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WPO201900062 Calculations 2021-03-19
Southwood Redevelopment — Village 1 ALBEMARLE COUNTY, VIRGINIA ROAD PLAN, WPO PLAN, & PRELIMINARY SUBDIVISION PLAT DESIGN CALCULATIONS & NARRATIVE OCTOBER 30, 2019 REVISED: JUNE 4, 2020 REVISED: SEPTEMBER 10, 2020 REVISED: OCTOBER 26, 2020 REVISED: MARCH 19, 2021 TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Clint Shifflett, PE Timmons Group 608 Preston Avenue, Suite 200 Charlottesville, VA 22903 434.327.1690 CLINT W. �y S FFLET > Lic. N s43ae �ar� 3/19/2021 At Table of Contents Section Title 1. Project Narrative 2. LD-204 Inlet Calculations 3. LD-229 Pipe Calculations 4. LD-347 Hydraulic Grade Line Analysis 5. LD-269 Culvert Calculations 6. Outlet Protection Sizing 7. Virginia Runoff Reduction Method Worksheet Summary 8. Bioretention Routing Calculations 9. Storage Pipe Routing Calculations Project Narrative: This project includes the construction three roads, a residential community, and associated utilities and landscaping. The limits of disturbance is 15.68 acres. Water Ouality: The current site is undeveloped. 22.68 acres was analyzed for water quality, including 15.68 acres of disturbed area. The total TP load reduction required is 9.12 lbs/year. There will be 5.55 lbs/year to be treated via Bioretention 1, and 2.25 lbs/year to be treated via Bioretention 2. The remaining 1.32 lbs/yr of required nutrient credits area shall be purchased from a DEQ-Approved Nutrient Credit Bank in Accordance with VA code 62.1-44.15:35. Water Quantity The proposed stormwater conveyance system outfall enters a floodplain and discharges runoff into an established channel with less than 1 % of the contributing drainage area, in accordance with 9VAC25-870-66 section C.3. Bioretention facilities 1 & 2 have been analyzed to ensure adequate storage and routing. No further stormwater quantity measures have been provided as part of this development. Energy balance requirements will be met through the use of two bioretention basins and one dry pond. Flood protection requirements for the 10-year storm will be met by releasing the stormwater into the mapped floodplain, in accordance with 9VAC25-670-66, Section C.3.c. FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 1 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET �, �s" q - 01 a Sag Inlets Only z Z Z F. 106 D1-3B 6.000 0.048 0.90 0.0432 O'RIGHT 0.019 0.25 0.0048 0.048 4 0.192 0 0.192 0.0250 0.0208 1.312 2.000 1.5244 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.613 6.000 1.661 1.000 0.192 0.000 1.311 108 D1-2B 10 0.037 0.90 0.0333 O'RIGHT 0.017 0.25 0.0043 0.038 4 0.152 0 0.152 0.0200 0.0208 1.253 2.000 1.5962 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.063 6.000 3.265 1.000 0.152 0.000 1.253 110 D1-2B 10 0.024 0.90 0.0216 O'RIGHT 0.007 0.25 0.0018 0.023 4 0.092 0 0.092 0.0496 0.0208 0.876 2.000 2.2831 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.257 6.000 3.070 1.000 0.092 0.000 0.876 112 D1-3B 6.000 0.147 0.90 0.1323 O'RIGHT 0.037 0.25 0.0093 0.142 4 0.568 0 0.568 0.0496 0.0208 1.732 2.000 1.1547 0.0833 4.0048 1.000 3.50 0.1458 0.1666 6.997 6.000 0.858 0.970 0.551 0.017 1.731 112A D1-3B 6.000 0.093 0.90 0.0837 O'RIGHT 0.037 0.25 0.0093 0.093 4 0.372 0 0.372 0.0100 0.0208 1.995 2.000 1.0025 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.623 6.000 1.656 1.000 0.372 0.000 1.994 114 D1-3B 6.000 0.058 0.90 0.0522 O'RIGHT 0.026 0.25 0.0065 0.059 4 0.236 0 0.236 0.0450 0.0208 1.270 2.000 1.5748 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.699 6.000 1.277 1.000 0.236 0.000 1.269 116 D1-3B 6.000 0.098 0.90 0.0882 O'RIGHT 0.029 0.25 0.0073 0.095 4 0.38 0 0.380 0A000 0.0208 L008 2.000 L9841 0.0833 4.0048 L000 3.50 0.1458 0.1666 11.055 6.000 0.543 0.755 0.287 0.093 L008 127A D1-3B 6.000 0.119 0.90 0.1071 O'RIGHT 0.051 0.25 0.0128 0.12 4 0.48 0 0.480 0.0100 0.0208 2.766 2.000 0.7231 0.0833 4.0048 0.994 3.50 0.1458 0.1658 4.045 6.000 1.483 1.000 0.480 0.000 2.191 132 D1-2B 8 0.047 0.90 0.0423 0.000'RIG 0.018 0.25 0.0045 0.047 4 0.188 0 0.188 0.0100 0.0208 1.545 2.000 1.2945 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.720 6.000 2.941 1.000 0.188 0.000 1.545 INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 2 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET A - ce V a Ukw� Oo ��? o�c �� a o C7 �.' o °c7 Z Q. .. u Sag Inlets Only Z z ' 134 DI-2A 2 0.132 0.90 0.1188 O'RIGHT 0.144 0.25 0.036 0.155 4 0.62 0 0.620 0.0289 0.0208 1.980 2.000 1.0101 0.0833 4.0048 1.000 3.50 0.1458 0.1666 6.173 2.000 0.324 0.506 0.314 0.306 1.980 136 DI-2B 10 0.070 0.90 0.063 O'RIGHT 0.029 0.25 0.0073 0.07 4 0.28 0 0.280 0.0289 0.0208 1.471 2.000 1.3596 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.421 6.000 2.262 1.000 0.280 0.000 1.470 136A DI-2B 8 0.048 0.90 0.0432 O'RIGHT 0.016 0.25 0.004 0.047 4 0.188 0 0.188 0.0100 0.0208 1.545 2.000 1.2945 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.720 6.000 1941 1.000 0.188 0.000 1.545 138 DI-3B 6.000 0.032 0.90 0.0288 O'RIGHT 0.011 0.25 0.0028 0.032 4 0.128 0 0.128 0.0289 0.0208 1.097 2.000 1.8232 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.182 6.000 1.886 1.000 0.128 0.000 1.096 140 DI-1 2.000 0.212 0.90 0.1908 O'RIGHT 0.180 0.25 0.045 0.355 0.20 0.071 0.307 4 1.228 0 1.228 0.0100 0.3333 1.311 2.000 1.5256 0.3333 1 1.000 2.00 0.0833 0.4166 3.452 2.000 0.579 1.000 1.228 0.000 5.243 142 DI-1 2.000 0.885 0.90 0.7965 Bwk/Lt. 0.000'RIG 0.189 0.35 0.0662 Bwk/Lt. 1.796 0.20 0.3592 Bwk/Lt. 1.222 4 4.888 0 0.0500 0.1800 2.392 2.000 0.8361 0.1800 1 2.00 Bwk/Lt. 0 4 0 0 Ahead/Rt. 4.888 0.0500 2.000 2 4.888 5.032 1.440 7.032 2.330 Weir Flow 144 DI-2B 10 0.063 0.90 0.0567 0.000'RIG 0.021 0.35 0.0074 0.064 4 0.256 0 0.256 0.0289 0.0208 1.422 2.000 1.4065 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.258 6.000 2.349 1.000 0.256 0.000 1.421 F 144A DI-3B 6.000 0.097 0.90 0.0873 I O'RIGHT 0.036 0.25 0.009 0.096 4 0.384 0 0.384 0.0100 0.0208 2.076 2.000 0.9634 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.672 6.000 L634 1.000 0.384 0.000 2.018 144B DI-2B 8 0.069 0.90 0.0621 INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 3 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET cekw� 01 Sag Inlets Only 0.000'RIG 0.036 0.25 0.009 0.071 4 0.284 0 0.284 0.0100 0.0208 1.803 2.000 1.1093 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.235 6.000 2.473 1.000 0.284 0.000 1.803 146 D1-3B 6.000 0.143 0.90 0.1287 0.000'RIG 0.034 0.25 0.0085 0.137 4 0.548 0 0.548 0.0289 0.0208 1.891 2.000 1.0576 0.0833 4.0048 1.000 3.50 0.1458 0.1666 5.861 6.000 1.024 1.000 0.548 0.000 1.890 148 D1-3B 6.000 0.055 0.90 0.0495 O'RIGHT 0.018 0.25 0.0045 0.054 4 0.216 0 0.216 0.0289 0.0208 1.334 2.000 1.4993 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.964 6.000 1.514 1.000 0.216 0.000 1.334 150 D1-3B 6.000 0.104 1 0.90 0.0936 0.000'RIG 0.064 0.25 0.016 0.11 4 0.44 0 0.440 0.0100 0.0208 2.494 2.000 0.8019 0.0833 4.0048 0.998 3.50 0.1458 0.1663 3.892 6.000 1.542 1.000 0.440 0.000 2.123 152 D1-3B 6.000 0.099 0.90 0.0891 O'RIGHT 0.033 0.25 0.0083 0.097 4 0.388 0 0.388 0.0289 0.0208 1.662 2.000 1.2034 0.0833 4.0048 1.000 3.50 0.1458 0.1666 5.070 6.000 1.183 1.000 0.388 0.000 1.661 154 D1-2B 70 0.077 0.90 0.0693 O'RIGHT 0.028 0.25 0.007 0.076 4 0.304 0 0.304 0.0500 0.0208 1.369 2.000 1.4609 0.0833 4.0048 1.000 3.50 0.1458 0.1666 5.394 66.000 12.977 1.000 0.304 0.000 1.368 154A D1-3B 6.000 0.062 0.90 0.0558 O'RIGHT 0.021 0.25 0.0053 0.061 4 0.244 0 0.244 0.0100 0.0208 1.704 2.000 1.1737 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.035 6.000 1.977 1.000 0.244 0.000 1.703 154B D1-2B 8 0.057 0.90 0.0513 YRIGHT 0.023 0.25 0.0058 0.057 4 0.228 0 0.228 0.0100 0.0208 1.661 2.000 1.2041 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.950 6.000 2.712 1.000 0.228 0.000 1.660 156 D1-3B 6.000 0.078 0.90 0.0702 0.000'RIG 0.029 0.25 0.0073 0.077 4 0.308 0 0.308 0.0500 0.0208 1.375 2.000 1.4545 0.0833 4.0048 L000 3.50 0.1458 0.1666 5.424 6.000 1.106 1.000 0.308 0.000 1.375 158 DI-2B 10 0.115 0.90 0.1035 INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 4 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET cekw� 01 Sag Inlets Only O'RIGHT 0.037 0.25 0.0093 0.113 4 0.452 0 0.452 0.0500 0.0208 1.588 2.000 1.2594 0.0833 4.0048 1.000 3.50 0.1458 0.1666 6.372 6.000 1.569 1.000 0.452 0.000 1.587 160 D1-3B 6.000 0.119 0.90 0.1071 0.000'RIG 0.040 0.25 0.01 0.117 4 0.468 0 0.468 0.0500 0.0208 1.609 2.000 1.243 0.0833 4.0048 1.000 3.50 0.1458 0.1666 6.466 6.000 0.928 0.991 0.464 0.004 1.608 162 D1-2B 8 0.042 0.90 0.0378 0.000'RIG 0.014 0.25 0.0035 0.041 4 0.164 0 0.164 0.0100 0.0208 1.468 2.000 1.3624 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.568 6.000 3.115 1.000 0.164 0.000 1.468 164 D1-3B 6.000 0.057 0.90 0.0513 0.000'RIG 0.016 0.25 0.004 0.055 4 0.22 0 0.220 0.0390 0.0200 1.270 2.000 1.5748 0.0833 4.165 1.000 3.52 0.1466 0.1666 4.371 6.000 1.373 1.000 0.220 0.000 1.270 166 D1-3B 6.000 0.016 0.90 0.0144 0.000'RIG 0.004 0.25 0.001 0.015 4 0.06 0 0.060 0.0200 0.0200 0.885 2.000 2.2599 0.0833 4.165 1.000 3.52 0.1466 0.1666 2.073 6.000 2.894 1.000 0.060 0.000 0.884 168 D1-2B 8 0.014 0.90 0.0126 0.000'RIG 0.003 0.25 0.0008 0.013 4 0.052 0 0.052 0.0100 0.0208 0.955 2.000 2.0942 0.0833 4.0048 1.000 3.50 0.1458 0.1666 1.585 6.000 5.047 1.000 0.052 0.000 0.954 170 D1-2B 8 0.102 0.90 0.0918 0.000'RIG 0.062 0.25 0.0155 0.107 4 0.428 0 0.428 0.0100 0.0208 2.409 2.000 0.8302 0.0833 4.0048 0.999 3.50 0.1458 0.1665 3.845 6.000 2.081 1.000 0.428 0.000 2.101 172 D1-3B 6.000 0.053 0.90 0.0477 O'RIGHT 0.016 0.25 0.004 0.052 4 0.208 0 0.208 0.0131 0.0200 1.526 2.000 1.3106 0.0833 4.165 1.000 3.52 0.1466 0.1666 3.078 6.000 1.949 1.000 0.208 0.000 1.525 172A D1-3B 6.000 0.119 0.90 0.1071 O'RIGHT 0.051 0.25 0.0128 0.12 4 0.48 0 0.480 0.0100 0.0208 2.766 2.000 0.7231 0.0833 4.0048 0.994 3.50 0.1458 0.1658 4.045 6.000 1.483 1.000 0.480 0.000 2.191 202A D1-2B 8 0.050 0.90 0.045 INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 5 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET cekw� 01 Sag Inlets Only 0.000'RIG 0.012 0.25 0.003 0.048 4 0.192 0 0.192 0.0100 0.0208 1.557 2.000 1.2845 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.744 6.000 2.915 1.000 0.192 0.000 1.557 204 D1-2B 10 0.052 0.90 0.0468 O'RIGHT 0.020 0.25 0.005 0.052 4 0.208 0 0.208 0.0250 0.0208 1.352 2.000 1.4793 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.736 6.000 2.677 1.000 0.208 0.000 1.351 206 D1-3B 6.000 0.095 0.90 0.0855 O'RIGHT 0.030 0.25 0.0075 0.093 4 0.372 0 0.372 0.0250 0.0208 1.681 2.000 1.1898 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.769 6.000 1.258 1.000 0.372 0.000 1.680 208 D1-2B 10 0.110 1 0.90 0.099 O'RIGHT 0.031 0.25 0.0078 0.107 4 0.428 0 0.428 0.0250 0.0208 1.771 2.000 1.1293 0.0833 4.0048 1.000 3.50 0.1458 0.1666 5.059 6.000 1.977 1.000 0.428 0.000 L771 208A D1-3B 6.000 0.130 0.90 0.117 O'RIGHT 0.064 0.25 0.016 0.133 4 0.532 0 0.532 0.0100 0.0208 3.091 2.000 0.647 0.0833 4.0048 0.986 3.50 0.1458 0.1646 4.241 6.000 1.415 1.000 0.532 0.000 2.271 208B D1-2B 8 0.049 0.90 0.0441 O'RIGHT 0.014 0.25 0.0035 0.048 4 0.192 0 0.192 0.0100 0.0208 1.557 2.000 1.2845 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.744 6.000 2.915 1.000 0.192 0.000 1.557 210 D1-3B 6.000 0.059 0.90 0.0531 O'RIGHT 0.027 0.25 0.0068 0.06 4 0.24 0 0.240 0.0289 0.0208 1.388 2.000 1.4409 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.144 6.000 1.448 1.000 0.240 0.000 1.387 210A D1-3B 6.000 0.017 0.90 0.0153 O'RIGHT 0.045 0.25 0.0113 0.027 4 0.108 0 0.108 0.0100 0.0208 1.256 2.000 1.5924 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.155 6.000 2.784 1.000 0.108 0.000 1.255 210B D1-3B 2.000 0.024 0.90 0.0216 O'RIGHT 0.006 0.25 0.0015 0.023 4 0.092 0 0.092 0.0100 0.0208 1.182 2.000 1.692 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.015 2.000 0.993 1.000 0.092 0.000 1.182 212 DI-3B 6.000 0.026 0.90 0.0234 INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 6 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET cekw� 01 Sag Inlets Only 0.000'RIG 0.006 0.25 0.0015 0.025 4 0.1 0 0.100 0.0289 0.0208 1.000 2.000 2 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.869 6.000 2.091 1.000 0.100 0.000 1.000 214 D1-2A 2 0.044 0.90 0.0396 0.000'RIG 0.016 0.25 0.004 0.044 4 0.176 0 0.176 0.0200 0.0208 1.324 2.000 1.5106 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.257 2.000 0.614 0.820 0.144 0.032 1.323 216 D1-3B 6.000 0.092 0.90 0.0828 O'RIGHT 0.025 0.25 0.0063 0.089 4 0.356 0 0.356 0.0200 0.0208 1.724 2.000 1.1601 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.379 6.000 1.370 1.000 0.356 0.000 1.723 218 DI-1 1.000 0.071 1 0.90 0.0639 0.000'RIG 0.083 0.25 0.0208 0.042 0.20 0.0084 0.093 4 0.372 0 0.372 0.0700 0.0208 1.386 2.000 1.443 0.0833 4.0048 1.000 3.50 0.1458 0.1666 6.495 1.000 0.154 1.000 0.372 0.000 1.385 220 D1-3B 6.000 0.060 0.90 0.054 O'RIGHT 0.012 0.25 0.003 0.057 4 0.228 0 0.228 0.0200 0.0208 1.459 2.000 1.3708 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.631 6.000 1.652 1.000 0.228 0.000 1.458 222 D1-2B 10 0.039 0.90 0.0351 O'RIGHT 0.015 0.25 0.0038 0.039 4 0.156 0 0.156 0.0300 0.0208 1.173 2.000 1.705 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.497 6.000 2.860 1.000 0.156 0.000 1.172 224 D1-2B 8 0.032 0.90 0.0288 O'RIGHT 0.027 0.25 0.0068 0.036 4 0.144 0 0.144 0.0100 0.0208 1.398 2.000 1.4306 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.432 6.000 3.289 1.000 0.144 0.000 1.398 224A D1-3B 6.000 0.130 0.90 0.117 O'RIGHT 0.044 0.25 0.011 0.128 4 0.512 0 0.512 0.0100 0.0208 2.970 2.000 0.6734 0.0833 4.0048 0.990 3.50 0.1458 0.1651 4.166 6.000 1.440 1.000 0.512 0.000 2.241 224B D1-3B 6.000 0.127 0.90 0.1143 O'RIGHT 0.131 0.25 0.0328 0.147 4 0.588 0 0.588 0.0100 0.0208 3.409 2.000 0.5867 0.0833 4.0048 0.975 3.50 0.1458 0.1630 4.449 6.000 1.349 1.000 0.588 0.000 2.351 INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 7 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET F azs 2" q " w Z - cekw� u O, U c? V V 'q �c °.fk. U� a '� V o � U Z 6 .. u Sag Inlets Only Z Z 226 D1-3B 6.000 0.092 0.90 0.0828 0.000'RIG 0.025 0.25 0.0063 0.089 4 0.356 0 0.356 0.0389 0.0208 1.522 2.000 1.3141 0.0833 4.0048 1.000 3.50 0.1458 0.1666 5.346 6.000 1.122 1.000 0.356 0.000 1.521 226A D1-2B 10 0.133 0.90 0.1197 O'RIGHT 0.070 0.25 0.0175 0.137 4 0.548 0 0.548 0.0389 0.0208 1.789 2.000 1.1179 0.0833 4.0048 1.000 3.50 0.1458 0.1666 6.408 6.000 1.561 1.000 0.548 0.000 1.788 228 D1-2B 6 0.046 0.90 0.0414 YRIGHT 0.011 0.25 0.0028 0.044 4 0.176 0 0.176 0.0100 0.0208 1.507 2.000 1.3271 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.646 4.000 1 2.268 1.000 0.176 0.000 1.507 230 D1-2B 6 0.096 0.90 0.0864 O'RIGHT 0.029 0.25 0.0073 0.053 0.20 0.0106 0.104 4 0.416 0 0.416 0.0100 0.0208 2.321 2.000 0.8617 0.0833 4.0048 0.999 3.50 0.1458 0.1665 3.799 4.000 1.579 1.000 0.416 0.000 2.079 232 D1-3B 6.000 0.234 0.90 0.2106 O'RIGHT 0.038 0.25 0.0095 0.22 4 0.88 0 0.880 0.0100 0.0208 4.719 2.000 0.4238 0.0833 4.0048 0.905 3.50 0.1458 0.1527 5.480 6.000 1.095 1.000 0.880 0.000 2.678 234 DI-1 2.000 0.063 0.90 0.0567 Bwk/Lt. 0.000'RIG 0.014 0.25 0.0035 Bwk/Lt. O. 160 0.20 0.032 Bwk/Lt. 0.092 4 0.368 0 Bwk/Lt. 0 4 0 0 Ahead/Rt. 0.368 0.0100 2.000 2 0.368 1.384 T> 8.0 ft 236 DI-1 2.000 0.461 0.90 0.4149 Bwk/Lt. 0.000'RIG 0.035 0.25 0.0088 Bwk/Lt. 0.724 0.20 0.1448 Bwk/Lt. 0.568 4 2.272 0 Bwk/Lt. 0 4 0 0 Ahead/At. 2.272 0.001 2.000 2 2.272 4.657 240 DI-1 1.000 0.064 0.90 0.0576 0.000'RIG 0.038 0.25 0.0095 110tft 0.067 4 0.268 0 INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 8 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET F W S C7 Ca �" < a U a Km"°'� U �� �v �v UU Sag Inlets Only m z a z H 0 4 0 0 Ahead/Rt. 0.268 0.001 1.000 1 0.268 1.746 T > 8.0 ft 242 DI-3B 6.000 0.210 0.90 0.189 YRIGHT 0.053 0.25 0.0133 0.016 0.20 0.0032 0.205 4 0.82 0 0.820 0.0100 0.0208 4.486 2.000 0.4458 0.0833 4.0048 0.920 3.50 0.1458 0.1549 5.276 6.000 1.137 1.000 0.820 0.000 2.620 302 DI-3C 6.000 0.382 0.90 0.3438 Bwk/Lt. 0.000'RIG 0.063 0.25 0.0158 Bwk/Lt. 0.36 4 144 0 0.0200 0.0208 5.209 2.000 0.384 0.0833 4.0048 3.50 Bwk/Lt. 0 4 0 0 Ahead/At. 1.440 0.0200 6 1.440 1.943 0.166 0.333 0.4985 3.943 7.782 Weir Flow 404 DI-1 2.000 0.406 0.90 0.3654 Bwk/Lt. 0.000'RIG 0.196 0.25 0.049 Bwk/Lt. 0.414 4 1.656 0 Bwk/Lt. 0 4 0 0 Ahead/At. 1.656 0.001 2.000 2 1.656 3.772 T > 8.0 ft 404A DI-1 2.000 0.070 0.90 0.063 Bwk/Lt. 0.000'RIG 0.079 0.25 0.0198 Bwk/Lt. 0.083 4 0.332 0 Bwk/Lt. 0 4 0 0 Ahead/At. 0.332 0.0100 2.000 2 0.332 1.292 T> 8.0 ft 406 DI-1 2.000 0.122 0.90 0.1098 Bwk/Lt. 0.000'RIG 0.089 0.25 0.0223 Bwk/Lt. 0.132 4 0.528 0 Bwk/Lt. 0 4 0 0 Ahead/At. 0.528 0.001 2.000 2 0.528 1.760 T > 8.0 ft 408 DI-1 2.000 0.054 0.90 0.0486 0.000'RIG 0.053 0.25 0.0133 0.062 4 0.248 0 0.248 0.0500 0.0208 1.268 2.000 1.5773 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.952 2.000 0.404 1.000 0.248 0.000 1.268 412 DI-1 2.000 0.065 0.90 0.0585 Bwk/Lt. 0.000'RIG 0.078 0.25 0.0195 Bwk/Lt. 0.078 4 0.312 0 0.001 0.0208 5.102 2.000 0.392 0.0833 4.0048 3.50 Bwk/Lt. 0 4 0 0 Ahead/At. 0.312 0.001 2.000 2 0.312 0.907 0.166 4.907 3.636 Weir Flow INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 9 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET " q Z - u O, Uc? V V 'q �c U� a '� V� o �U Z 6 .. Uv Sag Inlets Only Z 412A DI-3B 6.000 0.083 0.90 0.0747 O'RIGHT 0.024 0.25 0.006 0.081 4 0.324 0 0.324 0.0100 0.0208 1.895 2.000 1.0554 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.419 6.000 1.755 1.000 0.324 0.000 1.894 414 DI-3B 6.000 0.054 0.90 0.0486 O'RIGHT 0.024 0.25 0.006 0.055 4 0.22 0 0.220 0.0400 0.0208 1.264 2.000 1.5823 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.404 6.000 1.362 1.000 0.220 0.000 1.264 416 DI-3B 6.000 0.031 0.90 0.0279 O'RIGHT 0.043 0.25 0.0108 0.039 4 0.156 0 0.156 0.0200 0.0208 1.265 2.000 1.581 0.0833 4.0048 1.000 3.50 0.1458 0.1666 3.096 6.000 1.938 1.000 0.156 0.000 1.265 416A DI-3B 6.000 0.009 0.90 0.0081 O'RIGHT 0.004 0.25 0.001 0.009 4 0.036 0 0.036 0.0100 0.0208 0.832 2.000 2.4038 0.0833 4.0048 1.000 3.50 0.1458 0.1666 1.359 6.000 4.415 1.000 0.036 0.000 0.832 418 DI-3B 6.000 0.063 0.90 0.0567 O'RIGHT 0.016 0.25 0.004 0.015 0.20 0.003 0.064 4 0.256 0 0.256 0.0496 0.0208 1.285 2.000 1.5564 0.0833 4.0048 1.000 3.50 0.1458 0.1666 5.007 6.000 1.198 1.000 0.256 0.000 1.285 420 DI-3B 6.000 0.066 0.90 0.0594 O'RIGHT 0.041 0.25 0.0103 0.07 4 028 0 0.280 0.0400 0.0208 1.384 2.000 L4451 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.874 6.000 1.231 1.000 0.280 0.000 1.383 506 DI-3B 6.000 0.024 0.90 0.0216 O'RIGHT 0.010 0.25 0.0025 0.024 4 0.096 0 0.096 0.0131 0.0200 1.142 2.000 1.7513 0.0833 4.165 1.000 3.52 0.1466 0.1666 2.224 6.000 2.698 1.000 0.096 0.000 1.142 508 DI-3C 6.000 0.063 0.90 0.0567 Bwk/Lt. 0.000'RIG 0.016 0.25 0.004 Bwk/Lt. 0.061 4 1 0.244 0 Bwk/Lt. 0.320 0.61 0.1952 Ahead/Rt. 0.195 4 0.78 0 0.0131 0.0200 3.952 2.000 0.5061 0.0833 4.165 3.52 Ahead/Rt. 1.024 0.0131 6 1.024 1.547 0.160 0.333 0.48048 3.547 6.448 Weir Flow 600 DI-1 2.000 2.712 0.25 0.678 1 Bwk/Lt. INLETSOFT BY ENSOFTEC DATE: 311912021 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 10 OF 10 LD204 PROJECT SouthwoodVillagel DESIGNER: CG CHECKED: DATE 3/19/2021 UNITS ENGLISH INLET Sag Inlets Only " F az" w ce k w � ° .fk. 3 y a � chi p u 01 0.000'RIG 0.020 0.20 0.004 Bwk/Lt. 0.682 4 2.728 0 0.0100 0.3333 1.768 2.000 1.1312 0.3333 1 2.00 Bwk/Lt. 0 4 0 0 Ahead/Rt. 2.728 0.0100 2.000 2 2.728 3.852 2.666 5.852 0.963 Weir Flow INLETSOFT BY ENSOFTEC DATE: 311912021 LD-229 STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 10 PROJECT: Southwood Redevelopment- Village 1 LOCATION: COUNTY: Charlottesville Designed by: CG Checked by: UNITS ENGLISH PIPE NO. FROM POINT TO POINT DRAIN. AREA "A" Acre (3) RUNOFF COEFF. "C" (4) CA INLET TIME Minutes (7) RAIN FALL In/Hr (8) RUNOFF INVERT ELEVATIONS LENGTH of Pipe Ft. (12) SLOPE Ft./Ft. (13) SIZE (Dia. Or Span/Rise) In. (14) SHAPE Number of Pipes Capacity CFS (15) Friction Slope Ft./Ft. NORMAL FLOW FLOW TIME REMARKS (18) INCRE- MENT �5) ACCUM- ULATED �6) Lateral CFS Total Q CFS (9) UPPER END (10) LOWER END (11) Depth of Flow, do Ft. Area of Flow, An SgFt Hm Ft. Vn Ft/Sec (16) En Ft. INCRE- MENT Minutes (17) ACCUMU -LATED Minutes (17) REFERENCE (1) STA. REFERENCE (2) STA. 101 102 100 0.00 0.00 0.00 5.00 0.00 0.00 76.89 409.71 409.00 47.58 0.01492 36 Circular 1 88.26 0.01180 2.17 5.47 0.90 14.07 5.24 0.06 5.06 103 104 102 0.00 0.00 0.50 6.15 6.19 0.00 43.76 410.83 409.81 67.71 0.01506 30 Circular 1 54.53 0.01010 1.70 3.54 0.73 12.35 4.06 0.09 6.24 105 106 104 0.07 0.72 0.05 0.50 6.06 6.21 0.00 13.99 418.63 411.43 89.98 0.08002 24 Circular 1 69.33 0.00340 0.61 0.81 0.35 17.27 5.24 0.09 6.15 107 108 106 0.05 0.70 0.04 0.45 5.96 6.24 0.00 13.69 422.80 421.02 71.00 0.02507 24 Circular 1 38.80 0.00320 0.82 1.21 0.44 11.28 2.80 0.11 6.06 109 110 108 0.03 0.74 0.02 0.41 5.79 6.29 0.00 2.59 432.10 427.94 92.51 0.04497 15 Circular 1 14.84 0.00140 0.35 0.29 0.20 9.08 1.64 0.17 5.96 111 112 112A 0.18 0.77 0.14 0.30 5.44 6.40 0.00 1.91 437.93 432.20 114.53 0.05003 15 Circular 1 15.65 0.00080 0.30 0.22 0.17 8.65 1.46 0.22 5.66 111A 112A 110 0.13 0.72 0.09 0.39 5.62 4.88 0.00 2.37 440.84 438.03 56.22 0.04998 15 Circular 1 15.65 0.00120 0.33 0.26 0.19 9.19 1.64 0.10 5.73 113 114 112 0.08 0.70 0.06 0.15 5.21 6.47 0.00 1.00 445.12 440.94 83.63 0.04998 15 Circular 1 1 15.65 0.00020 0.21 0.14 0.13 7.15 1.01 0.20 5.41 115 116 114 0.13 0.75 0.10 0.10 5.00 6.54 0.00 0.62 448.30 445.22 76.90 0.04005 15 Circular 1 14.01 0.00010 0.18 0.11 0.11 5.74 0.69 0.22 5.22 119 120 108 0.00 0.00 0.00 5.00 0.00 11.19 424.43 422.90 61.43 0.02491 18 Circular 1 17.96 0.01010 0.86 1.04 0.41 10.72 2.64 0.10 5.10 127 128 126 0.00 0.00 4.88 8.57 4.26 0.00 27.75 419.12 418.00 27.95 0.04007 30 Circular 1 88.95 0.00410 0.96 1.73 0.52 16.01 4.94 0.03 8.60 129 130 128 0.00 0.00 4.88 8.51 5.58 0.00 27.75 430.38 427.88 62.56 0.03996 30 Circular 1 88.93 0.00410 0.96 1.74 0.52 16.00 4.93 0.07 8.57 131 136 130 0.10 0.71 0.07 4.88 8.46 5.59 0.00 27.75 437.19 436.73 30.94 0.01487 30 Circular 1 54.19 0.00410 1.27 2.50 0.63 11.10 3.18 0.05 8.51 133 134 136A 0.28 0.56 0.16 0.16 5.00 6.54 0.00 1.01 438.57 437.90 44.59 0.01503 15 Circular 1 8.59 0.00020 0.29 0.22 0.17 4.70 0.63 0.16 5.16 135 1136A 136 0.06 0.73 0.05 0.25 5.30 6.44 0.00 1.61 437.80 437.29 51.16 0.00997 15 Circular 1 6.99 0.00050 0.41 0.35 0.23 4.62 0.74 0.18 5.49 135A 132 136A 0.07 0.72 0.05 0.05 5.00 5.04 0.00 0.24 438.87 438.38 48.27 0.01015 15 Circular 1 7.05 0.00000 0.16 0.09 0.10 2.67 0.27 0.30 5.30 137 138 136 0.04 0.74 0.03 1.56 5.28 6.45 0.00 10.20 439.15 438.60 55.20 0.00996 24 Circular 1 24.46 0.00180 0.90 1.37 0.47 7.43 1.76 0.12 5.40 139 140 138 0.75 0.41 0.31 1.53 5.10 6.51 0.00 9.99 440.05 439.25 79.43 0.01007 24 Circular 1 24.59 0.00170 0.89 1.35 0.46 7.42 1.74 0.18 5.28 141 142 140 2.87 0.43 1.22 1.22 5.00 6.54 0.00 7.99 442.51 440.60 63.87 0.02990 15 Circular 1 12.10 0.01360 0.74 0.76 0.35 10.54 2.47 0.10 5.10 143 144 136 0.08 0.76 0.06 2.83 7.97 5.71 0.00 16.52 445.05 442.33 181.26 0.01501 24 Circular 1 30.03 0.00470 1.06 1.69 0.52 9.79 2.55 0.31 8.28 143A 144A 144B 0.13 0.72 0.10 0.10 5.00 5.04 0.00 048 443.64 443.31 32.70 0.01009 15 Circular 1 7.03 0.00000 0.22 0.15 0.14 3.29 0.39 0.17 5.17 143B 144B 136 0.11 0.68 0.07 3.00 8.28 4.32 0.00 17.24 442.23 440.62 10T07 0.01504 24 Circular 1 30.06 0.00520 1.09 1.74 0.53 9.89 2.61 0.18 8.46 145 146 144 0.18 0.77 0.14 0.14 5.00 6.54 0.00 0.90 448.35 447.59 38.24 0.01987 15 Circular 1 9.87 0.00020 0.25 0.18 0.15 5.00 0.64 0.13 5.13 147 148 144 0.07 0.74 0.05 2.63 7.73 5.77 0.00 15.38 446.35 445.15 119.92 0.01001 24 Circular 1 24.52 0.00410 1.15 1.87 0.54 8.24 2.20 0.24 7.97 149 150 148 0.17 0.66 0.11 2.58 7.57 5.80 0.00 15.06 453.66 451.62 101.95 0.02001 24 Circular 1 34.67 0.00390 0.92 1.42 0.47 10.65 2.68 0.16 7.73 151 152 150 0.13 0.74 0.10 0.10 5.00 6.54 0.00 0.64 454.16 453.76 40.05 0.00999 15 Circular 1 7.00 0.00010 0.25 0.18 0.15 3.55 0.45 0.19 5.19 153 154C 150 0.00 0.00 2.25 7.20 4.53 0.00 13.33 461.98 460.85 45.25 0.02497 24 Circular 1 38.73 0.00310 0.81 1.19 0.43 11.18 2.75 0.07 7.27 153A 154A 154B 0.08 0.74 0.06 0.06 5.00 5.04 0.00 0.31 459.99 459.61 37.79 0.01006 15 Circular 1 7.02 0.00000 0.18 0.11 0.11 2.87 0.31 0.22 5.22 153B 154B 150 0.08 0.71 0.06 2.37 7.27 4.51 0.00 13.86 458.87 455.13 187.03 0.02000 24 Circular 1 34.66 0.00330 0.88 1.33 0.46 10.42 2.57 0.30 7.57 153C 154 154C 0.11 0.72 0.08 2.18 7.12 4.55 0.00 12.98 463.69 462.26 57.06 0.02506 24 Circular 1 38.90 0.00290 0.80 1.17 0.43 11.12 2.72 0.09 7.20 155 156 154 0.11 0.72 0.08 0.08 5.00 6.54 0.00 0.50 464.55 463.79 37.80 0.02011 15 Circular 1 9.92 0.00010 0.19 0.12 0.12 4.24 0.47 0.15 5.15 157 158 154 0.15 0.74 0.11 2.02 6.88 5.98 0.00 12.29 469.69 465.85 153.79 0.02497 24 Circular 1 38.73 0.00260 0.77 1.12 0.42 10.94 2.63 0.23 7.12 159 160 158 0.16 0.74 0.12 0.12 5.00 6.54 0.00 0.77 472.60 472.22 37.79 0.01006 15 Circular 1 7.02 0.00010 0.28 0.20 0.17 3.75 0.50 0.17 5.17 161 162A 158 0.00 0.00 1.79 6.73 4.63 0.00 10.91 475.23 473.49 87.11 0.01997 24 Circular 1 34.63 0.00210 0.77 1.12 0.42 9.77 2.25 0.15 6.88 161A 162 162A 0.06 0.73 0.04 1.79 6.52 4.68 0.00 10.91 479.28 476.74 126.88 0.02002 24 Circular 1 34.68 0.00210 0.77 1.12 0.42 9.77 2.25 0.22 6.73 163 164 162 0.07 0.75 0.06 0.06 5.00 6.54 0.00 0.36 483.35 482.94 41.32 0.00992 15 Circular 1 6.97 0.00000 0.19 0.12 0.12 2.99 0.33 0.23 5.23 165 166 162 0.02 0.75 0.02 1 1.70 6.33 6.14 0.00 10.46 480.25 479.36 87.43 0.01018 24 Circular 1 24.73 0.00190 0.91 1.39 0.47 7.54 1.79 0.19 6.57 LD-229 STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 10 PROJECT: Southwood Redevelopment- Village 1 LOCATION: COUNTY: Charlottesville Designed by: CG Checked by: UNITS ENGLISH PIPE NO. FROM POINT TO POINT DRAIN. AREA "A" AcreMinutes (3) RUNOFF]CRE COEFF. "C" (4) INLET (7) RAIN FALL In/Hr (8) RUNOFF INVERT ELEVATIONS LENGTH of Pipe (12) SLOPE Ft./Ft. (13) SIZE (Dia. Or Span/Rise) In. (14) SHAPE Number of Pipes Capacity CFS (15) Friction Slope Ft./Ft. NORMAL FLOW FLOW TIME REMARKS (18) CUM- ATEDTIME (6) Lateral CFS Total Q CFSFt. (9)(10) UPPER END LOWER END (11) Depth of Flow, do Ft. Area of Flow, An SgFt Hm Ft. Vn Ft/Sec (16) En Ft. INCRE- MENT Minutes (17) ACCUMO -LATED Minutes (17) REFERENCE (1) STA. REFERENCE (2) STA. 167 168 166 0.02 0.77 .68 6.23 6.16 0.00 10.37 480.77 480.35 42.31 0.00993 24 C rcu ar 1 24.42 0.00190 0.91 1.39 0.47 7.46 L77 0.10 6.33 169 170A 168 0.00 .28 5.66 4.88 0.00 1.36 492.90 481.40 149.53 0.01003 18 Circular 1 11.40 0.00010 0.35 0.31 0.21 4.34 0.64 0.57 6.23 169A 170 170A 0.16 0.65 .11 5.00 5.04 0.00 0.54 484.50 483.56 94.12 0.00999 15 Circular 1 7.00 0.00010 0.24 0.16 0.14 3.38 0.41 0.46 5.46 171 172 170 0.07 0.75 .05 5.00 6.54 0.00 0.34 484.61 483.71 90.18 0.00998 15 Circular 1 6.99 0.00000 0.19 0.12 0.12 2.95 0.32 0.51 5.51 171A 172A 170A 0.17 0.71 .17 5.51 4.91 0.00 0.93 483.36 483.00 35.28 0.01020 15 Circular 1 7.07 0.00020 0.31 0.23 0.18 3.99 0.55 0.15 5.66 201 202 200 0.00 .78 6.55 4.67 0.00 17.08 414.90 413.95 15.83 0.06001 24 Circular 1 60.04 0.005I0 0.73 1.04 0.40 16.46 4.94 0.02 6.57 203 202A 204 0.06 0.77 .05 5.00 6.54 0.00 0.31 429.47 428.32 57.56 0.01998 15 Circular 1 9.89 0.00000 0.15 0.09 0.10 3.68 0.36 0.26 5.26 203A 204 204A 0.07 0.72 0.05 2.78 6.44 6.11 0.00 17.08 428.22 427.61 30.42 0.02005 24 Circular 1 1 34.70 0.00510 0.99 1.55 0.50 11.00 2.87 0.05 6.48 203B 204A 202 0.00 0.00 2.78 6.48 4.68 0.00 17.08 419.53 415.36 69.57 0.05994 24 Circular 1 60.00 0.00510 0.73 1.04 0.40 16.46 4.94 0.07 6.55 205 206 204 0.13 0.74 0.09 0.09 5.00 6.54 0.00 0.61 429.30 428.84 30.92 0.01493 15 Circular 1 8.55 0.00010 0.23 0.15 0.14 4.04 0.48 0.13 5.13 207 208 208B 0.14 0.76 0.11 2.40 6.26 6.16 0.00 15.04 430.79 430.08 35.74 0.01987 24 Circular 1 34.55 0.00390 0.92 142 0.47 10.62 2.67 0.06 6.31 207A 208A 208B 0.19 0.69 0.13 0.13 5.00 5.04 0.00 0.67 430.79 430.08 35.52 0.01999 18 Circular 1 16.09 0.00000 0.21 0.15 0.13 4.50 0.52 0.13 5.13 207B 208B 204 0.06 0.76 0.05 2.58 6.34 4.72 0.00 15.90 429.98 428.82 58.09 0.01997 24 Circular 1 34.63 0.00440 0.95 1.47 0.48 10.79 2.76 0.09 6.43 209 210 210B 0.09 0.70 0.06 2.24 6.03 6.22 0.00 14.15 434.35 433.23 55.90 0.02004 24 Circular I 34.69 0.00350 0.89 1.35 0.46 10.48 2.60 0.09 6.12 209A 210A 210B 0.06 0.44 0.03 0.03 5.00 5.04 0.00 0.14 434.29 433.97 32.00 0.01000 15 Circular 1 7.00 0.00000 0.12 0.06 0.08 2.25 0.20 0.24 5.24 209B 210B 208 0.03 0.77 0.02 2.29 6.12 4.77 0.00 14.39 433.13 430.96 108.73 0.01996 24 Circular 1 34.62 0.00360 0.90 1.37 0.47 10.51 2.61 0.17 6.29 211 212 210 0.03 0.78 0.03 2.18 5.98 6.24 0.00 13.77 435.09 434.45 32.04 0.01998 24 Circular I 34.64 0.00330 0.88 1.33 0.46 10.40 2.56 0.05 6.03 213 214 212 0.06 0.73 0.04 2.16 5.91 6.26 0.00 13.62 436.01 435.20 40.45 0.02002 24 Circular I 34.68 0.00320 0.87 1.31 0.46 10.37 2.54 0.07 5.98 215 216 214 0.12 0.76 0.09 0.18 5.04 6.53 0.00 1.19 436.72 436.11 30.60 0.01993 12 Circular 1 5.45 0.00100 0.32 0.21 0.18 5.56 0.80 0.09 5.14 217 218 216 0.20 0.47 0.09 0.09 5.00 6.54 0.00 0.61 438.90 438.17 16.12 0.04529 12 Circular 1 8.21 0.00030 0.18 0.10 0.11 6.13 0.77 0.04 5.04 219 220 214 0.07 0.79 0.06 1.93 5.79 6.29 0.00 12.20 438.40 436.32 83.40 0.02494 24 Circular 1 38.70 0.00260 0.77 1.12 0.42 10.92 2.62 0.13 5.91 221 222 220 0.05 0.72 0.04 1.88 5.72 6.31 0.00 11.85 438.84 438.53 30.71 0.01009 24 Circular 1 24.62 0.00240 0.98 1.53 0.49 7.76 1.91 0.07 5.79 223 224 224B 0.06 0.61 0.04 0.53 5.43 4.93 0.00 2.96 445.31 442.37 98.00 0.03000 15 Circular 1 12.12 0.00190 0.42 0.36 0.24 8.16 1.45 0.20 5.63 223A 224A 224B 0.17 0.74 0.13 0.13 5.00 5.04 0.00 0.65 441.28 440.98 29.79 0.01007 15 Circular 1 7.02 0.00010 0.26 0.18 0.15 3.57 0.45 0.14 5.14 223B 224B 222 0.26 0.57 0.15 0.81 5.63 4.88 0.00 3.95 440.88 440.06 40.95 0.02002 15 Circular 1 9.90 0.00330 0.55 0.52 0.29 7.62 1.45 0.09 5.72 225 226 226A 0.12 0.76 0.09 0.09 5.00 6.54 0.00 0.58 447.30 446.70 29.79 0.02014 15 Circular 1 9.93 0.00010 0.21 0.13 0.13 4.43 0.51 0.11 5.11 225A 226A 224 0.20 0.68 0.14 0.23 5.11 6.51 0.00 147 446.56 445.41 57.42 0.02003 15 Circular 1 9.90 0.00050 0.33 0.25 0.19 5.79 0.85 0.17 5.28 227 228 222 0.06 0.77 0.04 1.03 5.45 6.40 0.00 6.68 440.78 440.08 34.83 0.02010 18 Circular 1 16.13 0.00360 0.67 0.77 0.35 8.70 1.85 0.07 5.52 229 230 228 0.18 0.58 0.10 0.98 5.35 6.43 0.00 640 441.86 440.86 49.76 0.02010 18 Circular 1 16.13 0.00330 0.66 0.74 0.34 8.60 1.81 0.10 5.45 231 232 230 0.27 0.81 0.22 0.88 5.32 6.44 0.00 5.73 442.77 442.42 17.71 0.01976 15 Circular 1 9.84 0.00700 0.69 0.69 0.33 8.32 1.76 0.04 5.35 233 234 232 0.24 0.39 0.09 0.66 5.13 6.50 0.00 4.31 444.61 442.87 86.87 0.02003 15 Circular 1 9.90 0.00400 0.58 0.55 0.30 7.79 1.52 0.19 5.32 235 236 234 1.22 0.47 0.57 0.57 5.00 6.54 0.00 3.72 445.71 444.71 56.94 0.01756 15 Circular 1 927 0.00290 0.55 0.52 0.29 7.14 1.34 0.13 5.13 237 238 224 0.00 0.00 0.27 5.25 4.98 0.00 143 446.72 445.45 63.29 0.02007 15 Circular 1 9.91 0.00040 0.32 0.25 0.19 5.75 0.84 0.18 5.43 239 240 238 0.10 0.66 0.07 0.07 5.00 6.54 0.00 044 447.20 446.82 18.56 0.02047 15 Circular 1 10.01 0.00000 0.18 0.11 0.11 4.09 0.44 0.08 5.08 241 242 238 0.28 0.74 0.21 0.21 5.00 6.54 0.00 1.34 450.75 449.09 1 83.05 0.01999 15 Circular 1 9.99 0.00040 0.31 0.24 0.18 5.63 0.80 0.25 5.25 301 302 300 0.45 0.81 0.36 0.36 5.00 6.54 0.00 2.36 431.01 1 430.91 1 9.50 10.01053 15 Circular 1 7.18 0.00120 0.49 0.45 0.27 5.24 0.92 0.03 5.03 401 402 400 0.00 0.00 1.09 6.27 4.73 0.00 5.65 431.21 1 430.91 1 38.92 10.00771 18 Circular 1 9.99 0.00260 0.81 0.97 0.39 5.83 1.34 0.11 6.38 LD-229 STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 10 PROJECT: Southwood Redevelopment- Village 1 LOCATION: COUNTY: Charlottesville Designed by: CG Checked by: UNITS ENGLISH PIPE NO. FROM POINT TO POINT DRAIN. AREA "A" Acre (3) RUNOFF COEFF. "C' (4) CA INLET TIME Minutes (7) RAIN FALL In/Hr (8) RUNOFF INVERT ELEVATIONS LENGTH of Pipe Ft. (12) SLOPE Ft./Ft. (13) SIZE (Dia. Or Span/Rise) In. (14) SHAPE Number of Pipes Capacity CFS (15) Friction Slope Ft./Ft. NORMAL FLOW FLOW TIME REMARKS (18) INCRE- MENT �5) ACCUM- ULATED �6) Lateral CFS Total Q CFS �9) UPPER END (10) LOWER END (11) Depth of Flow, do Ft, Area of Flow, An SgFt Hm Ft, Vn Ft/Sec (16) En Ft. INCRE- MENT Minutes (17) ACCUMO -LATED Minutes (17) REFERENCE (l) STA. REFERENCE (2) STA. 403 404 404A 0.60 0.69 0.41 0.41 5.00 6.54 0.00 271 432.35 431.60 106.66 0.00703 5 Circular 1 5.87 0.00160 0.60 0.58 0.30 4.69 0.94 0.38 5.38 403A 404A 402 0.15 0.56 0.08 0.50 5.38 4.95 0.00 3.12 431.50 431.31 26.75 0.00710 15 Circular 1 5.90 0.00210 0.65 0.64 0.32 4.87 1.02 0.09 5.47 405 406 402 0.21 0.63 0.13 0.59 6.25 6.16 0.00 3.69 432.37 432.07 10.05 0.02985 15 Circular 1 12.09 0.00290 0.47 0.43 0.26 8.65 1.64 0.02 6.27 407 408 406 0.11 0.58 0.06 0.46 5.91 6.26 0.00 2.88 438.52 432.47 172.89 0.03499 15 Circular 1 13.09 0.00180 0.40 0.34 0.22 8.55 1.53 0.34 6.25 409 410 408 0.00 0.00 0.40 5SI 6.29 0.00 249 439.72 438.95 38.46 0.02002 15 Circular 1 9.90 0.00130 0.43 0.37 0.24 6.72 1.13 0.10 5.91 411 412 410 0.14 0.55 0.08 0.21 5.24 6.47 0.00 1.38 440.95 439.82 56.58 0.01997 15 Circular 1 9.99 0.00040 0.32 0.24 0.19 5.68 0.82 0.17 5.40 411A 412A 412 0.11 0.76 0.08 0.08 5.00 5.04 0.00 041 442.25 441.31 47.12 0.01995 15 Circular 1 9.98 0.00000 0.17 0.10 0.11 3.97 0.42 0.20 5.20 413 414 412 0.08 0.71 0.06 0.06 5.00 6.54 0.00 0.36 441.79 441.05 36.82 0.02010 15 Circular 1 1 9.92 0.00000 0.16 0.09 0.10 3.83 0.39 0.16 5.16 415 416B 410 0.00 0.00 0.18 5.71 4.86 0.00 1.11 446.38 444.00 47.62 0.04998 15 Circular 1 15.65 0.00030 0.23 0.15 0.14 7.37 1.07 0.11 5.81 417 418 416 0.09 0.68 0.06 0.13 5.17 6.49 0.00 0.87 451.86 451.43 43.16 0.00996 15 Circular 1 6.98 0.00020 0.30 0.23 0.18 3.89 0.53 0.19 5.36 417A 416 416A 0.07 0.53 0.04 0.17 5.36 4.95 0.00 1.07 45133 451.01 32.38 0.00988 15 Circular 1 6.96 0.00020 0.33 0.26 0.19 4.10 0.59 0.13 5.49 417B 416A 416B 0.01 0.69 0.01 0.18 5.49 4.92 0.00 1.11 450.91 450.37 53.95 0.01001 15 Circular 1 7.00 0.00030 0.34 0.27 0.20 4.17 0.61 0.22 5.71 419 420 418 0.11 0.65 0.07 0.07 5.00 6.54 0.00 046 452.30 451.96 33.27 0.01022 15 Circular I 7.08 0.00000 0.22 0.14 0.13 3.25 0.38 0.17 5.17 501A 500A 500 0.00 0.00 0.00 5.00 0.00 823 444.26 443.25 50.56 0.01998 18 Circular I 14.85 0.00640 0.80 0.96 0.39 8.62 1.95 0.10 5.10 505 506 504 0.03 0.71 0.02 0.28 5.18 5.00 0.00 6.67 479.55 479.00 54.57 0.01008 24 Circular 1 22.71 0.00090 0.74 1.06 0.41 6.28 1.36 0.15 5.33 507 508 506 0.40 0.64 0.26 0.26 5.04 5.03 0.00 6.55 480.16 479.65 1 51.80 0.00985 24 Circular 1 22.45 0.00090 0.74 1.06 0.40 6.20 1.34 0.14 5.18 509 510 508 0.00 0.00 0.00 5.00 0.00 0.00 5.26 483.83 483.44 1 19.58 10.019921 24 Circular I 31.93 0.00o601 0.55 1 0.70 0.32 7.51 1.42 0.04 5.04 601 600 168 1.55 0.90 1.39 1.39 5.00 6.54 0.00 9.10 482.21 480.96 62.63 0.01996 24 Circular 1 34.62 0.00140 0.70 0.98 0.39 1 9.29 2.04 0.11 5.11 LD-347 PROJECT: Southwood Redevelopment - Village 1 DESIGNED BY: CIS HYDRAULIC GRADE LINE ANALYSIS Checked: INCIDENCE PROBABILITY 10 Year INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA. PIPE Do (In/mm) DESIGN DISCH. Qo (CFS/CMS) LENGTH PIPE Lo (FtlM) FRICTION SLOPE, Sfo (FT/FT) (M/M) FRICTION LOSS Hf (FtlM) JUNCTION LOSS SURFACE FLOW Adj. Ht 1.3 Ht (Ft/M) Inlet Shaping? Y/N 0.5 Ht (FtlM) FINAL H (FtlM) Inlet Water Surface Elevation Top of MH Top of Inlet Elev. APPROX. Adjustment? Vo Contr. Ho (FtlM) Vi Vi'2/2g Hi (Expn) 0.35`MAX. (Vi2/2g) SKEW Angle K Bend H (FtlM) Sum HL (Ft/M) (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (16) (17) (18) (19) 100 1 1 1 1 1 1 412.330 102 409.000 3.00 412.330 36 76.887 47.58 0.01184 0.563 14.068 0.768 12.349 2.368 0.829 0.0 0.00 0.000 1.597 0.000 1.597 YES 0.799 1.362 413.692 415.000 O.K. 104 409.810 2.50 413.692 30 43.764 67.71 0.01014 0.687 12.349 0.592 23.264 8.404 2.941 0.0 0.00 0.000 3.533 0.000 3.533 YES 1.767 2.453 416.145 416.170 O.K. 122 411.220 1.50 416.145 18 41.110 19.66 0.16011 3.148 23.264 2.101 0.000 0.000 0.000 0.0 0.00 0.000 2.101 0.000 2.101 YES 1.050 4.198 420.343 422.750 O.K. 106 411.430 2.00 416.145 24 13.992 89.98 0.00341 0.307 17.271 1.158 11.283 1.977 0.692 0.0 0.00 0.000 1.850 0.298 1.850 YES 0.925 1.232 419.239 432.440 O.K. 108 421.020 2.00 422.620 24 13.694 71.00 0.00326 0.232 11.283 0.494 10.717 1.783 0.624 0.0 0.00 0.000 1.118 0.237 1.118 YES 0.559 0.791 423.620 432.850 O.K. 110 427.940 1.25 428.940 15 2.592 92.51 0.00143 0.133 9.084 0.320 9.193 1.312 0.459 0.0 0.00 0.000 0.780 0.145 0.780 YES 0.390 0.522 432.454 437.000 O.K. 112A 438.030 1.25 439.030 15 2.366 56.22 0.00119 0.067 9.193 0.328 8.646 1.161 0.406 0.0 0.00 0.000 0.734 0.454 0.734 YES 0.367 0.434 441.168 443.190 O.K. 112 432.200 1.25 441.168 15 1.912 114.53 0.00078 0.089 8.646 0.290 7.153 0.794 0.278 0.0 0.00 0.000 0.568 0.909 0.739 YES 0.369 0.459 441.627 445.910 O.K. 114 440.940 1.25 441.940 15 1.003 83.63 0.00021 0.018 7.153 0.199 5.741 0.512 0.179 0.0 0.00 0.000 0.378 0.382 0.491 YES 0.246 0.263 445.334 449.790 O.K. 116 445.220 1.25 446.220 15 0.621 76.90 0.00008 0.006 5.741 0.128 0.000 0.000 0.000 0.0 0.00 0.000 0.128 0.621 0.166 YES 0.083 0.089 448.479 453.350 O.K. 120 422.900 1.50 424.100 18 11.190 61.43 0.01011 0.621 10.717 0.446 0.000 0.000 0.000 0.0 0.00 0.000 0.446 0.000 0.446 YES 0.223 0.844 425.287 432.910 O.K. LD-347 HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY 10 Year PROJECT: Southwood Redevelopment - Village 1 DESIGNED BY: CG Checked: INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA. PIPE Do (In/mm) DESIGN DISCH. Qo (CFS/CMS) LENGTH PIPE Lo (FtlM) FRICTION SLOPE, Sfo (FT/FT) (M/M) FRICTION LOSS Hf (FtlM) JUNCTION LOSS SURFACE FLOW Adj. Ht 1.3 Ht (Ft/M) Inlet Shaping? Y/N 0.5 Ht (FtlM) FINAL H (FtlM) Inlet Water Surface Elevation Top of MH Top of Inlet Elev. APPROX. Adjustment? Vo Contr. Ho (FtlM) Vi Vi'2/2g Hi (Expn) 0.35'MAX. (Vi2/2g) SKEW Angle K Bend H (FtlM) Sum HL (FtlM) (1) (2) 1 (3) (4) 1 (5) (6) 1 (7) (8) (9) (10) (11) (12) (13) (14) (15) it (16) 1 1 (16) (17) 1 (18) (19) 126 1 1 1 1 420.750 128 418.000 2.50 420.750 30 27.754 27.95 0.00408 0.114 16.010 0.995 15.995 3.973 1.390 0.0 0.00 0.000 2.385 0.000 2.385 YES 1.193 1.307 422.057 437.500 O.K. 130 427.880 2.50 429.880 30 27.754 62.56 0.00408 0.255 15.995 0.993 11.104 1.915 0.670 0.0 0.00 0.000 1.663 0.000 1.663 YES 0.832 1.087 431.340 446.920 O.K. 136 436.730 2.50 438.730 30 27.754 30.94 0.00408 0.126 11.104 0.479 9.894 1.520 0.532 0.0 0.00 0.000 1.011 0.391 1.011 YES 0.505 0.632 439.362 446.110 O.K. 144 442.330 2.00 443.930 24 16.522 181.26 0.00475 0.861 9.786 0.372 8.242 1.055 0.369 0.0 0.00 0.000 0.741 0.365 0.741 YES 0.370 1.232 446.109 454.810 O.K. 148 445.150 2.00 446.750 24 15.375 119.92 0.00411 0.493 8.242 0.264 10.648 1.761 0.616 0.0 0.00 0.000 0.880 0.311 0.880 YES 0.440 0.933 447.683 458.100 O.K. 150 451.620 2.00 453.220 24 15.064 101.95 0.00395 0.403 10.648 0.440 11.184 1.942 0.680 0.0 0.00 0.000 1.120 0.638 1.120 YES 0.560 0.963 454.582 460.860 O.K. 154C 460.850 2.00 462.450 24 13.330 45.25 0.00309 0.140 11.184 0.486 11.120 1.920 0.672 0.0 0.00 0.000 1.158 0.000 1.158 YES 0.579 0.719 463.169 468.240 O.K. 154 462.260 2.00 463.860 24 12.981 57.06 0.00293 0.167 11.120 0.480 10.940 1.858 0.650 0.0 0.00 0.000 1.130 0.345 1.130 YES 0.565 0.733 464.593 470.950 O.K. 158 465.850 2.00 467.450 24 12.286 153.79 0.00263 0.404 10.940 0.465 9.765 1.481 0.518 0.0 0.00 0.000 0.983 0.676 0.983 YES 0.491 0.895 470.464 478.640 O.K. 162A 473.490 2.00 475.090 24 10.910 87.11 0.00207 0.180 9.765 0.370 9.774 1.483 0.519 0.0 0.00 0.000 0.889 0.000 0.889 YES 0.445 0.625 476.001 483.300 O.K. 162 476.740 2.00 478.340 24 10.910 126.88 0.00207 0.263 9.774 0.371 7.542 0.883 0.309 0.0 0.00 0.000 0.680 0.192 0.680 YES 0.340 0.603 480.051 489.620 O.K. 166 479.360 2.00 480.960 24 10.461 87.43 0.00190 0.167 7.542 0.221 7.456 0.863 0.302 0.0 0.00 0.000 0.523 0.092 0.523 YES 0.261 0.428 481.388 491.970 O.K. 168 480.350 2.00 481.950 24 10.369 42.31 0.00187 0.079 7.456 0.216 9.289 1.340 0.469 0.0 0.00 0.000 0.685 0.080 0.685 YES 0.342 0.422 482.372 491.640 O.K. 170A 481.400 1.50 482.600 18 1.360 149.53 0.00015 0.022 4.343 0.073 3.989 0.247 0.086 0.0 0.00 0.000 0.160 0.000 0.160 YES 0.080 0.102 483.250 498.880 O.K. 170 483.560 1.25 484.560 15 0.539 94.12 0.00006 0.006 3.379 0.044 2.950 0.135 0.047 0.0 0.00 0.000 0.092 0.539 0.119 YES 0.060 0.065 484.735 488.420 O.K. 172 483.710 1.25 484.735 15 0.340 90.18 0.00002 0.002 2.950 0.034 0.000 0.000 0.000 0.0 0.00 0.000 0.034 0.340 0.044 YES 0.022 0.024 484.797 489.010 O.K. 138 438.600 2.00 440.200 24 10.198 55.20 0.00181 0.100 7.432 0.214 7.423 0.856 0.299 0.0 0.00 0.000 0.514 0.206 0.514 YES 0.257 0.357 440.557 447.900 O.K. 140 439.250 2.00 440.850 24 9.992 79.43 0.00174 0.138 7.423 0.214 10.536 1.724 0.603 0.0 0.00 0.000 0.817 1.998 0.817 YES 0.409 0.547 441.397 445.030 O.K. 142 440.600 1.25 441.600 15 7.994 63.87 0.01364 0.871 10.536 0.431 0.000 0.000 0.000 0.0 0.00 0.000 0.431 7.994 0.560 YES 0.280 1.151 443.252 449.240 O.K. 136A 437.290 1.25 439.362 15 1.605 51.16 0.00055 0.028 4.624 0.083 4.695 0.342 0.120 0.0 0.00 0.000 0.203 0.303 0.203 YES 0.101 0.130 439.491 444.610 O.K. 134 437.900 1.25 439.491 15 1.014 44.59 0.00022 0.010 4.695 0.086 0.000 0.000 0.000 0.0 0.00 0.000 0.086 1.014 0.111 YES 0.056 0.065 439.556 443.560 O.K. 144B 440.620 2.00 442.220 24 17.243 107.07 0.00517 0.554 9.894 0.380 3.285 0.168 0.059 0.0 0.00 0.000 0.439 0.306 0.439 YES 0.219 0.773 443.316 449.230 O.K. LD-347 HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY 10 Year PROJECT: Southwood Redevelopment - Village 1 DESIGNED BY: CG Checked: INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA. PIPE Do (In/mm) DESIGN DISCH. Qo (CFS/CMS) LENGTH PIPE Lo (FtlM) FRICTION SLOPE, Sfo (FT/FT) (M/M) FRICTION LOSS Hf (FtlM) JUNCTION LOSS SURFACE FLOW Adj. Ht 1.3 Ht (Ft/M) Inlet Shaping? Y/N 0.5 Ht (FtlM) FINAL H (FtlM) Inlet Water Surface Elevation Top of MH Top of Inlet Elev. APPROX. Adjustment? Vo Contr. Ho (FtlM) Vi Vi'2/2g Hi (Expn) 0.35'MAX. (Vi2/2g) SKEW Angle K Bend H (FtlM) Sum HL (FtlM) (1) (2) 1 (3) (4) 1 (5) (6) 1 (7) (8) (9) (10) (11) (12) (13) (14) (15) it (16) 1 1 (16) (17) 1 (18) (19) 144A 443.310 1.25 444.310 15 0.484 32.70 0.00005 0.002 3.285 0.042 0.000 0.000 0.000 0.0 0.00 0.000 0.042 0.484 0.054 YES 0.027 0.029 444.339 449.610 O.K. 146 447.590 1.25 448.590 15 0.896 38.24 0.00017 0.007 4.999 0.097 0.000 0.000 0.000 0.0 0.00 0.000 0.097 0.896 0.126 YES 0.063 0.070 448.660 454.880 O.K. 152 453.760 1.25 454.760 15 0.635 40.05 0.00009 0.003 3.547 0.049 0.000 0.000 0.000 0.0 0.00 0.000 0.049 0.635 0.063 YES 0.032 0.035 454.795 460.890 O.K. 154B 455.130 2.00 456.730 24 13.863 187.03 0.00334 0.626 10.417 0.421 2.873 0.128 0.045 0.0 0.00 0.000 0.466 0.257 0.466 YES 0.233 0.859 459.750 466.030 O.K. 154A 459.610 1.25 460.610 15 0.308 37.79 0.00002 0.001 2.873 0.032 0.000 0.000 0.000 0.0 0.00 0.000 0.032 0.308 0.042 YES 0.021 0.022 460.632 466.510 O.K. 156 463.790 1.25 464.790 15 0.504 37.80 0.00005 0.002 4.238 0.070 0.000 0.000 0.000 0.0 0.00 0.000 0.070 0.504 0.091 YES 0.045 0.047 464.837 471.430 O.K. 160 472.220 1.25 473.220 15 0.765 37.79 0.00012 0.005 3.753 0.055 0.000 0.000 0.000 0.0 0.00 0.000 0.055 0.765 0.071 YES 0.036 0.040 473.260 479.120 O.K. 164 482.940 1.25 483.940 15 0.360 41.32 0.00003 0.001 2.993 0.035 0.000 0.000 0.000 0.0 0.00 0.000 0.035 0.360 0.045 YES 0.023 0.024 483.964 490.030 O.K. 600 480.960 2.00 482.560 24 9.097 62.63 0.00144 0.090 9.289 0.335 0.000 0.000 0.000 0.0 0.00 0.000 0.335 9.097 0.435 YES 0.218 0.308 482.910 487.290 O.K. 172A 483.000 1.25 484.000 15 0.929 35.28 0.00018 0.006 3.989 0.062 0.000 0.000 0.000 0.0 0.00 0.000 0.062 0.589 0.080 YES 0.040 0.047 484.047 489.900 O.K. 132 438.380 1.25 439.491 15 0.237 48.27 0.00001 0.001 2.666 0.028 0.000 0.000 0.000 0.0 0.00 0.000 0.028 0.237 0.036 YES 0.018 0.019 439.510 443.200 O.K. LD-347 HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY 10 Year PROJECT: Southwood Redevelopment - Village 1 DESIGNED BY: CG Checked: INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA. PIPE Do (In/mm) DESIGN DISCH. Qo (CFS/CMS) LENGTH PIPE Lo (FtlM) FRICTION SLOPE, Sfo (FT/FT) (M/M) FRICTION LOSS Hf (FtlM) JUNCTION LOSS SURFACE FLOW Adj. Ht 1.3 Ht (Ft/M) Inlet Shaping? Y/N 0.5 Ht (FtlM) FINAL H (FtlM) Inlet Water Surface Elevation Top of MH Top of Inlet Elev. APPROX. Adjustment? Vo Contr. Ho (FtlM) Vi Vi'2/2g Hi (Expn) 0.35'MAX. (Vi2/2g) SKEW Angle K Bend H (FtlM) Sum HL (FtlM) (1) (2) 1 (3) (4) 1 (5) (6) 1 (7) (8) (9) (10) (11) (12) (13) (14) (15) it (16) 1 1 (16) (17) 1 (18) (19) 200 1 1 1 1 416.120 202 413.950 2.00 416.120 24 17.075 15.83 0.00507 0.080 16.462 1.052 16.456 4.205 1.472 0.0 0.00 0.000 2.524 0.000 2.524 YES 1.262 1.342 417.462 420.100 O.K. 204A 415.360 2.00 417.462 24 17.075 69.57 0.00507 0.353 16.456 1.051 11.002 1.880 0.658 0.0 0.00 0.000 1.709 0.000 1.709 YES 0.855 1.208 420.260 435.860 O.K. 204 427.610 2.00 429.210 24 17.075 30.42 0.00507 0.154 11.002 0.470 10.788 1.807 0.633 0.0 0.00 0.000 1.102 0.317 1.102 YES 0.551 0.706 429.916 434.770 O.K. 206 428.840 1.25 429.916 15 0.608 30.82 0.00008 0.002 4.035 0.063 0.000 0.000 0.000 0.0 0.00 0.000 0.063 0.608 0.082 YES 0.041 0.044 429.959 435.090 O.K. 202A 428.320 1.25 429.916 15 0.314 57.56 0.00002 0.001 3.675 0.052 0.000 0.000 0.000 0.0 0.00 0.000 0.052 0.314 0.068 YES 0.034 0.035 429.951 433.280 O.K. 208B 428.820 2.00 430.420 24 15.897 58.09 0.00440 0.255 10.788 0.452 10.616 1.750 0.612 0.0 0.00 0.000 1.064 0.226 1.064 YES 0.532 0.788 431.208 436.260 O.K. 208 430.080 2.00 431.680 24 15.044 35.74 0.00394 0.141 10.616 0.437 10.511 1.716 0.600 0.0 0.00 0.000 1.038 0.659 1.038 YES 0.519 0.660 432.340 437.130 O.K. 210B 430.960 2.00 432.560 24 14.385 108.73 0.00360 0.392 10.511 0.429 10.480 1.705 0.597 0.0 0.00 0.000 1.026 0.110 1.026 YES 0.513 0.904 434.029 440.350 O.K. 210 433.230 2.00 434.830 24 14.147 55.90 0.00348 0.195 10.480 0.426 10.397 1.679 0.587 0.0 0.00 0.000 1.014 0.373 1.014 YES 0.507 0.702 435.532 441.830 O.K. 212 434.450 2.00 436.050 24 13.774 32.04 0.00330 0.106 10.397 0.420 10.372 1.670 0.585 0.0 0.00 0.000 1.004 0.156 1.004 YES 0.502 0.608 436.658 441.870 O.K. 214 435.200 2.00 436.800 24 13.618 40.45 0.00323 0.131 10.372 0.418 10.916 1.850 0.648 0.0 0.00 0.000 1.065 0.275 1.065 YES 0.533 0.663 437.463 442.430 O.K. 220 436.320 2.00 437.920 24 12.204 83.40 0.00259 0.216 10.916 0.463 7.761 0.935 0.327 0.0 0.00 0.000 0.790 0.359 0.790 YES 0.395 0.611 439.172 445.620 O.K. 222 438.530 2.00 440.130 24 11.845 30.71 0.00244 0.075 7.761 0.234 8.700 1.175 0.411 0.0 0.00 0.000 0.645 0.246 0.645 YES 0.323 0.398 440.528 445.350 O.K. 228 440.080 1.50 441.280 18 6.680 34.83 0.00360 0.125 8.700 0.294 8.603 1.149 0.402 0.0 0.00 0.000 0.696 0.281 0.696 YES 0.348 0.473 441.753 445.590 O.K. 230 440.860 1.50 442.060 18 6.399 49.76 0.00331 0.164 8.603 0.287 8.321 1.075 0.376 0.0 0.00 0.000 0.664 0.669 0.664 YES 0.332 0.496 442.556 447.620 O.K. 232 442.420 1.25 443.420 15 5.730 17.71 0.00701 0.124 8.321 0.269 7.794 0.943 0.330 0.0 0.00 0.000 0.599 1.417 0.779 YES 0.389 0.513 443.933 448.730 O.K. 234 442.870 1.25 443.933 15 4.314 86.87 0.00397 0.345 7.794 0.236 7.140 0.792 0.277 0.0 0.00 0.000 0.513 0.598 0.513 YES 0.256 0.602 445.187 449.970 O.K. 236 444.710 1.25 445.710 15 3.716 56.94 0.00295 0.168 7.140 0.198 0.000 0.000 0.000 0.0 0.00 0.000 0.198 3.716 0.257 YES 0.129 0.296 446.260 450.140 O.K. 208A 430.080 1.50 431.280 18 0.671 35.52 0.00004 0.001 4.500 0.079 0.000 0.000 0.000 0.0 0.00 0.000 0.079 0.671 0.102 YES 0.051 0.052 431.332 437.260 O.K. 210A 433.970 1.25 434.970 15 0.136 32.00 0.00000 0.000 2.250 0.020 0.000 0.000 0.000 0.0 0.00 0.000 0.020 0.136 0.026 YES 0.013 0.013 434.983 440.340 O.K. LD-347 HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY 10 Year PROJECT: Southwood Redevelopment - Village 1 DESIGNED BY: CG Checked: INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA. PIPE Do (In/mm) DESIGN DISCH. Qo (CFS/CMS) LENGTH PIPE Lo (FtlM) FRICTION SLOPE, Sfo (FT/FT) (M/M) FRICTION LOSS Hf (FtlM) JUNCTION LOSS SURFACE FLOW Adj. Ht 1.3 Ht (Ft/M) Inlet Shaping? Y/N 0.5 Ht (FtlM) FINAL H (FtlM) Inlet Water Surface Elevation Top of MH Top of Inlet Elev. APPROX. Adjustment? Vo Contr. Ho (FtlM) Vi Vi'2/2g Hi (Expn) 0.35'MAX. (Vi2/2g) SKEW Angle K Bend H (FtlM) Sum HL (FtlM) (1) (2) 1 (3) (4) 1 (5) (6) 1 (7) (8) (9) (10) (11) (12) (13) (14) (15) it (16) 1 1 (16) (17) 1 (18) (19) 216 436.110 1.00 437.463 12 1.189 30.60 0.00099 0.030 5.555 0.120 6.128 0.583 0.204 0.0 0.00 0.000 0.324 0.581 0.421 YES 0.211 0.241 437.704 442.760 O.K. 218 438.170 1.00 438.970 12 0.608 16.12 0.00026 0.004 6.128 0.146 0.000 0.000 0.000 0.0 0.00 0.000 0.146 0.608 0.190 YES 0.095 0.099 439.084 443.900 O.K. 224B 440.060 1.25 441.060 15 3.950 40.95 0.00333 0.136 7.615 0.225 8.158 1.033 0.362 0.0 0.00 0.000 0.587 0.718 0.587 YES 0.293 0.430 441.490 446.840 O.K. 224 442.370 1.25 443.370 15 2.961 98.00 0.00187 0.183 8.158 0.258 5.792 0.521 0.182 0.0 0.00 0.000 0.441 0.178 0.441 YES 0.220 0.404 445.731 450.600 O.K. 226A 445.410 1.25 446.410 15 1.473 57.42 0.00046 0.027 5.792 0.130 4.425 0.304 0.106 0.0 0.00 0.000 0.237 0.891 0.308 YES 0.154 0.180 446.886 452.830 O.K. 226 446.700 1.25 447.700 15 0.582 29.79 0.00007 0.002 4.425 0.076 0.000 0.000 0.000 0.0 0.00 0.000 0.076 0.582 0.099 YES 0.049 0.052 447.752 453.320 O.K. 224A 440.980 1.25 441.980 15 0.645 29.79 0.00009 0.003 3.572 0.050 0.000 0.000 0.000 0.0 0.00 0.000 0.050 0.645 0.064 YES 0.032 0.035 442.015 447.320 O.K. 238 445.450 1.25 446.450 15 1.434 63.29 0.00044 0.028 5.753 0.128 5.633 0.493 0.172 0.0 0.00 0.000 0.301 0.000 0.301 YES 0.150 0.178 447.041 453.460 O.K. 242 449.090 1.25 450.090 15 1.341 83.05 0.00038 0.032 5.633 0.123 0.000 0.000 0.000 0.0 0.00 0.000 0.123 1.341 0.160 YES 0.080 0.112 451.061 456.900 O.K. 240 446.820 1.25 447.820 15 0.438 18.56 0.00004 0.001 4.092 0.065 0.000 0.000 0.000 0.0 0.00 0.000 0.065 0.438 0.085 YES 0.042 0.043 447.863 451.720 O.K. LD-347 PROJECT: Southwood Redevelopment - Village 1 DESIGNED BY: CG HYDRAULIC GRADE LINE ANALYSIS Checked: INCIDENCE PROBABILIT) 10 Year INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA. PIPE Do (In/mm) DESIGN DISCH. Do (CFS/CMS) LENGTH PIPE Lo (Ft/M) FRICTION SLOPE, Sfo (FT/FT) (M/M) FRICTION LOSS Hf (Ft/M) JUNCTION LOSS SURFACE FLOW Adj. Ht 1.3 Ht (Ft/M) Inlet Shaping? Y/N 0.5 Ht (Ft/M) FINAL H (Ft/M) Inlet Water Surface Elevation Top of MH Top of Inlet Elev. APPROX. Adjustment? Vo Contr. Ho (Ft/M) Vi Vi*2/2g Hi (Expn) 0.35*MAX. (Vi2/2g) SKEW Angle K Bend H (Ft/M) Sum HL (Ft/M) (1) (2) (3 4 (5) (61 (7) (8) (9) (10) (11) (12) 13 (14) (15) 16 (16) (17) (18) (19) 300 431.910 302 430.910 1.25 431.910 15 2.355 9.50 0.00118 0.011 i 5.241 1 0.107 1 0.000 1 0.000 1 0.000 0.0 1 0.00 1 0.000 1 0.107 2.355 0.139 YES 0.069 0.081 431.991 432.770 O.K. LD-347 PROJECT: Southwood Redevelopment - Village 1 DESIGNED BY: CG HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY 10 Year Checked: INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA. PIPE Do (In/mm) DESIGN DISCH. Do (CFS/CMS) LENGTH PIPE Lo (FUM) FRICTION SLOPE, Sfo (FT/FT) (M/M) FRICTION LOSS Hf (FVM) JUNCTION LOSS SURFACE Adj. Ht 1.3 Ht (FUM) Inlet Shaping? Y/N 0.5 Ht (FUM) FINAL H (Ft/M) Inlet Water Surface Elevation Top of MIT Top of Inlet Elev. APPROX. Adjustment? Vo Conlr. Ho (FUM) Vi Vi'2/2g Hi (Expn) 0.35`MAX. (Vi2/2g) SKEW Angle K HFLOW BendT(F (FUM) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 17 18 19 400 1 1 1 1 1 1 432.290 402 430.910 1.50 432.290 18 5.653 38.92 0.00258 0.100 5.829 0.132 8.653 1.163 0.407 0.0 0.00 0.000 0.539 0.000 0.539 YES 0.269 0.370 432.660 437.620 O.K. 406 432.070 1.25 433.070 15 3.690 10.05 0.00291 0.029 8.653 0.291 8.554 1.136 0.398 0.0 0.00 0.000 0.688 0.813 0.895 YES 0.447 0.477 433.547 436.910 O.K. 408 432.470 1.25 433.547 15 2.877 172.89 0.00177 0.305 8.554 0.284 6.717 1 0.701 1 0.245 0.0 1 0.00 0.000 0.529 0.388 0.529 YES 0.265 0.570 438.918 445.650 O.K. 410 438.950 1.25 439.950 15 2.489 38.46 0.00132 0.051 6.717 0.175 7.371 0.844 0.295 0.0 0.00 0.000 0.470 0.000 0.470 YES 0.235 0.286 440.236 448.380 O.K. 416B 444.000 1.25 445.000 15 1.110 47.62 0.00026 1 0.013 7.371 0.211 4.171 0.270 0.095 0.0 0.00 0.000 0.305 1 0.000 0.305 YES 0.153 0.165 446.605 456.800 O.K. 416A 1 450.370 1 1.25 451.370 1 15 1 1.110 53.95 0.00026 0.014 4.171 0.068 4.103 0.261 0.091 0.0 0.00 0.000 0.159 0.044 0.159 YES 1 0.080 0.094 451.464 458.060 O.K. 416 451.010 1.25 452.010 15 1.066 32.38 0.00024 0.008 4.103 0.065 3.886 0.234 0.082 0.0 0.00 0.000 0.147 0.193 0.147 YES 0.074 0.082 452.092 458.020 O.K. 418 451.430 1.25 452.430 15 0.873 43.16 0.00016 0.007 3.886 0.059 3.247 0.164 0.057 0.0 0.00 0.000 0.116 0.415 0.151 YES 0.075 0.082 452.512 458.710 O.K. 420 451.960 1.25 452.960 15 0.458 33.27 0.00004 0.001 3.247 0.041 0.000 1 0.000 1 0.000 0.0 1 0.00 0.000 0.041 0.458 0.053 YES 0.027 0.028 452.988 458.560 O.K. 404A 431.310 1.25 432.660 15 3.118 1 26.75 0.00208 1 0.056 4.873 0.092 4.686 0.341 0.119 0.0 0.00 0.000 1 0.212 1 0.410 0.212 YES 0.106 1 0.161 432.821 1 437.240 O.K. 404 1 431.600 1 1.25 432.821 15 2.708 106.66 0.00157 0.167 4.686 0.085 0.000 0.000 0.000 0.0 0.00 0.000 0.085 2.708 0.111 1 YES 0.055 0.222 433.043 436.490 O.K. 412 439.820 1.25 440.820 15 1.384 56.58 0.00041 0.023 5.684 0.125 3.970 0.245 0.086 0.0 0.00 0.000 0.211 0.504 0.274 YES 0.137 0.160 441.266 445.970 O.K. 414 441.050 1.25 442.050 15 0.360 36.82 0.00003 0.001 3.833 0.057 0.000 1 0.000 0.000 0.0 0.00 0.000 0.057 0.360 0.074 YES 0.037 0.038 442.088 446.240 O.K. 412A 441.310 1.25 1 442.310 1 15 1 0.408 1 47.12 1 0.00004 1 0.002 1 3.970 0.061 0.000 0.000 0.000 0.0 1 0.00 1 0.000 1 0.061 1 0.408 1 0.080 YES 1 0.040 1 0.041 1 442.423 1 449.890 1 O.K. PROJECT South redd Redeveopment - Village 1 SHEEL UNITS OF FNGLISH CULVERT DESIGNER: REVIEWER: DESIGN FORM LD-269 DATE: 2/9/2021 DATE: ROAD CODNTY Albemarle (Zone 2) CULVERT 501 VA NOAA Station Charlottesville HYDROLOGICAL DATA Method: RATIONAL Drainage Area: 3317 Acres Time ofConcenhation 5 Minutes DESIGN FLOWS SMdr. EI -- Eli= L= S= SKEW= Ekv_4.= ELHWd= 45454 45294 R 452A6 H 7134 a 524% 00 Roadway Width 283 ft ROADWAY R ft ________________________________________________ Her ._ ______ ________________ DEPRESSION 0. ..n" Rod 0013 ELEVATION Stream Bed 456.53 R __________ Ek= Road Lerigh 1N Freeboard= Shkk. EkvRt=—ft ___ H TW DEPTH TW TW VEL. Cknrol low IS 44912 fl SuPce Type PAVED XVAIU i It 0.27 ft 325 fps 443 25 ft R,L(years) FLOW(efs) 10 Design 8,23 2 Check 6.43 25 Max. 1035 CULVERT DESCRIPTION: TYPE: Single/Multiple Conforming Inlet Edge DwAptioo: Smooth Tapemd Inlet Throat TOTAL FLOW Q c6 110WRISR BARREL ON c@ HEADWATER CALCULATIONS CONTROL HEADWATER ELEV ft OUTLET VEL fps MINIMUM SHOULDER ELEV. R COMbI RIS INLET CONTROL OUTLET CONTROL Sin a/Multi le Confonnin / Broken Back Colverts H ffi HWi ft FALL ft ELHVh R TW a do ft (d D)/2 ft ho a ke H fl U11Wo R MATERIAL SHAPE Sim (in) N Memang5 n Concrete Circular IB 1 001 823 82 L12 168 008 45454 0.27 I'll 1,31 1.31 020 0.84 45127 454.54 12.30 643 64 0.98 147 008 45433 0.25 098 124 124 020 0.51 450,87 454.33 1L52 1035 104 L32 198 0.08 454.84 0.30 124 1,37 1.37 020 1133 451,82 454.84 13.09 Broken Back Culvert TAILWATER DATA: TAILWATER RESULTS: ROADWAY DATA: ROADWAY OVERTOPPING: LENGTH Elev. SKEW° bannel Shape Tnngukr = 0.03$ Dischorc cfs Elevation ft Flow depM ft Vekwdy fps eadway WMflSfl 28.7 D.1harge c6 Overtopping Dkdarge Cfs Overtopping Ekvadon ft Bonin WMn,a Side Slope 4:(H:1V) Slope RL(H:1V) Channel Slope. BM 0.00 unfine Type PAVED 50.00 i, 44352 02] 325 d.42 ip M Bond SmaBon, R 456SS sf 0 000Side 18.00 lock 44350 025 3.06 -englb of Road, Il 100 heck 0 ON 0.0830 44355 0.30 3.64 0 ON Dismnce levadon n. TECHNICAL FOOTNOTES: (1) USEQ/NBFORBOXCULVERTS (4) ELhi=HWi+ELi(INVERT OF INLET CONTROL SECTION) (6)he-7W or(do + W)(WHICHEVER IS GREATER) (2)HWi/D= HW/D OR HWi/D FROM DESIGN CHARTS (5) TW BASED ON DOWNSTREAM CONTROL OR FLOW (7)H=[I+kc+(29n2LpIli 9'V/2g (3) FALL =HWI-(ELHWd-ELsB; FALL IS ZERO FOR CULVERTS ON GRADE DEPTH IN CHANNEL SUBSCRIPT DEFDSITIONS: COMMENTS / DISCUSSION: CULVERT BARREL SELECTED HWd DESIGN HEADWATER i INLET SIZE: n HWi HW IN INLET CONTROL o OUTLET SHAPE: MATERIAL: HWo HW IN OUTLET CONTROL sf Sucanded ENTRANCE: @ culvert face CULVERTSOFT by ENSOFTEC, INC. PROJECT South redd Redeveopment - Village 1 SHEEI UNITS OF ENGLISH CULVERT DESIGNER: REVIEWER: DESIGN FORM LD-269 DATE: 2/9/2021 DATE: ROAD COONTY Albemarle (Zone 2) CULVERT 509 VA NOAA SbBon Charlottesville HYDROLOGICAL DATA Method: INPUT Drainage Ares: 1.102 Time ofConcenhetion 5 DESIGN FLOWS SMdr. Ek-- Eli= L= S= SKEW= Ekv_ D. = ELHWd= 48500 483-91 R 48183 R 1958 R 1996M 00 Roadway Width 10 ft ROADWAY R ft _ �________________________________________________ Her ___________________Stream DEPRESSION ..n" Bed 0013 ELEVATION Bed 488 W R __________ Ek, Road length 25 Freeboard= Shkk. Elev. Rt=—ft ___ H TW DEPTH TW TW VEL Charnel low El 481" R Su0ce Type PAVED XVALUEI R 0.55 ft 5.02 fps 683.52 R R,L(years) FLOW(cfs) 10 Design 5,26 2 Check 215 25 Max. 6.62 CULVERT DESCRIPTION: TYPE: Sioglr/Moltiple Conforming Inlet Edge Description: Smooth Tapemd Inlet Throat TOTAL FLOW Q Ciscft FIX>W REIt BARREL O/N HEADWATER CALCULATIONS CONTROL HEADWATER ELEV R O1ITLET VEL fps M]Nl O SHOULDER ELEV. R COMMENTS INLET CONTROL OUTLET CONTROL Sin a/Multi le Conformin / Broken Beck Culverts HWm HWi ft FALL R ELHVh R TW a do ft (d Dy2 ft he a ke H fl ELHWo R MATERIAL SHAPE Sin (in) N M9nrang5 n Concrete Circular 24 1 001 526 53 0.59 117 008 48500 0.55 0,81 141 140 020 006 484.91 48500 749 225 23 044 0.73 008 48456 OAO 052 126 126 020 001 484.71 484.71 5,85 662 b 6 0.67 1.33 0,08 485.16 T60 0,91 1,46 146 020 0.10 48500 485.16 8,00 Broken Back Culvert TAILWATER DATA: TAILWATER RESULTS: ROADWAY DATA: ROADWAY OVERTOPPING: LENGTH Elev. SKEW° hannel Shape Triangular = 0.035 Dischar,,e cfs Elevation ft Flow depM ft Vekwdy fps oadway WMtllfl 10 D.Iharge c6 0—pp-g Dkdarge cfs Overtopping Ekvadon ft Bottum WMtgfl Side Slope Lb(HAV) Side Slope RL(H:1V) Channel Slope. fVft 0.00 unfine Type PAVED 3.00 e- 4840] 0.55 5.02 d2O6 op M Road Elevation, ft a88 sf 0 000 4.00 lock 48392 O60 4.06 -englb of Road,If 26 heck 0 ON 0.0830 484.12 060 5.32 0 ON Distance levadon n. TECHNICAL, FOOTNOTES: (1) USEQ/NBFORBOXCULVERTS (4) ELhi=HWi+ELi(INVERT OF INLET CONTROL SECTION) (6)he-7W or(do + D/2)(WHICHEVER IS GREATER) (2)HWi/D= HW/D OR HWYD FROM DESIGN CHARTS (5)TW BASED ON DOWNSTREAM CONTROL OR FLOW (7)H=[I+kc+(29n2L)/R13'V/2g (3) FALL =HWI-(ELHWd-ELsB; FALL IS ZERO FOR CULVERTS ON GRADE DEPTH IN CHANNEL SUBSCRIPT DEFINITIONS: COMMENTS / DISCUSSION: CULVERT BARREL SELECTED HWd DESIGN HEADWATER i INLET SIZE: n HWi HW IN INLET CONTROL o OUTLET SHAPE: MATERIAL: HWo HW IN OUTLET CONTROL sf Sucamhed ENJEiiNCE: @ culvert face CULVERTSOFT by ENSOFTEC, INC. If ' �� 1. 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M vdum.l.ubi.leM1 m.. lead llb/v1 MRB llzzl .en.Mnlmw�a Ym akIYMa6 Drainage ANDIA s Yitl(un. I —I M�nrpce•sprePml wmgmmal+ml wwlw.vl O nl PFmomm AM,INEIF for xemwalln DA A MNW) TGE.1 SS Pna DemlgmnM T..I—1 vWmeI. DA A (eo) RAai GRA UGH D,ae, ,=G ED 1..1 CHICK OK. TOTAL RUNOFF REDUCTION IN D.A. A UF) - .0.AIlb/p) 6.18 US T AAIIb/p) P. TOTAL Pxauxoxus REMAIN mOAMRAPnnxG RUNOFF NEDurnax PRACTICES Ix DA. A pb/pl D.. IIE WATER QUA OFF COMYIWNCE TAB FOR STIE COMYfLINCE CALCULATIONS a. nlsTanvlA I rz DceenR nPs NO nvlLmm M., GF--1 y At PE., P,AT TE D 1.e1 nM TULIMP GMFOTMMANAGED TURF AMA CHECK: OF. TOTALPxOEPxoxDS REARAM REQUIRED ON SITE IIbN.10 lOGUULPHOMHMRUl AAII pI TOTAL PHOSPHORUS PINIONED WITHOUT R llb/p) TmALPxOSPx AAIIbN.I TOTAL PHOSPHORUS LOAD REDUCTION MERGE NA A Ilb/y TOTAL PHOSPHORUS REMAINING AMR APPUR xG FAR LOAD REDUCTIONS IN DA A (ROI) F. SEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS O GEN MOVED VHTH RUNOFF REDUCTION PRACTICES:: AAAAIItyN.I ROWERS aui TOTAL NITROGEN REMOVED IN DA A (lb/p) Kb1 Nbep�lrtl Ybenba xHARRA M1nnl� Pemmnl lmm YpAeem Nbepnrtlb M1nwnaxy xbynn L"A Ewa.m (x) Mnmm ObA Pmmlr,) PmaaulYa) I-) m IRRI I RR) Ie (RN1 n 1M) 7.InfiFmlon RNI ended Deteneon Pone (NN) znee�nowm o xnepom I,IA) mmm oommm 00000 � rtlmGw RemoyEowrtx Rxo uTOICAL AALNj xrnox PRAen¢S Ix DAAR/M . N,uGAGU.COM,GANCETABPoRSNFGLCVLITONSLLn)wm.Only) FAA mM wnUna l^o NRI 13 .Ino RR) 11 a,1U,,d NMP (n. A) 000mm 000mm I GI Drainage Area B DAHma-AAFF.RRINCAN, L—I rnarPce•spreUe&1 wmgmmal+e&1 Em lw+ml TANI MADE—Te.II.Xe Fnr Re lii DA BMW) TnM .e PAR D.bymml TPNFN vW.me: Ds a(WI I S6909 UNE D—RD, BAR D(..LOR ED,.., CHEON ON. ECTALRUNGM REDUCTION IN DA. B (W) A.B nbna� A. B nbnn ARPL PHOSPHORUS REMAINING AFTER APPLYING RUNOFF REDUCTION PRACTICES IN DA. B nb/yrl ]5 SEE WATER AUTYCOMYLWNCE TAB FOR SITE COMYWNCE EALCULATLONS 1-IN, PlIlt— ,nn RO a. n1Y�aTL1 rz OceenM nBs U, nv lLmm Mm1PS— F 1 NOR T- --DE-Rug nz Xd NE.,P,ATA1 A I NOR TED(..I� nwK. TmIALIMPGEDwRFARRRTREATEDI-I REHECR OF TOTALPHOEPHORUS REMOVAL REQUIRED ON SITE nbnn ABnbm) TUEAL PHOSPHORUS RUMOREDA.. nbnn TOTAL PHOSPHORUSNnIl .A.nbmL A.n mL TUEALPHOSPHORUS REMAININGAFTERAPPLYING BMP LOAD REDUCTIONS IN Dn Bnb/rrl 0.25 SEE WATER QUALINCOMPLIANCE TAB FOR SITE COMPLWNCECALCU(ATIONS A.B�lbnrl NORNET GEMOVEOwRXOOT A. B:1bnrl TOTALXITROGEX REMOVED IN DA. B (RhOm. —1 Nbep�lmtl Wb..btl xlbeRen M1nsLiir Pemwsl Imm YPAeem Nbepnrtlb M1nwea Br XbyenlW Ewa.m(x) M.mm nb.L mm M� PnMm M) MI m IRRI e IRRI le (AN) n 1RRI 7. nfiPminn RR) ended Demoeoo Pone IRRI znee�nowm o HBe,/Oce a(ARI mmm oommm 00000 TOTAL RUNOFF REDUE�CEN IN A A(W) B,LGL .UTRD U. SEE WA PERWAUTY EEMIPLIANEETAB fORLrE fAINlRl10N5 (InJonnttbn (Mly) FAA mM wnUna l^o wl 13 .Ino MR) 11 -1U.,d BMP (n. RR) 000mm 000mm 4S 7S Onsite o Bioretention 1 To Biot tion 2 5S 6P 41 $P Offsite To Bioretention 1 o BIORETENTION 2 "'RETENTION 1 Subcat Reach Aon Llnk 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Summary for Subcatchment 4S: Onsite To Bioretention 1 Runoff = 11.45 cfs @ 11.97 hrs, Volume= 0.508 af, Depth> 1.30" Printed 6/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 2.710 98 Paved parking, HSG B 1.510 61 >75% Grass cover, Good, HSG B 0.460 60 Woods, Fair, HSG B 4.680 82 Weighted Average 1.970 42.09% Pervious Area 2.710 57.91% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 4S: Onsite To Bioretention 1 Hydrograph ■ Rurwff Time (hours) 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 4S: Onsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.01 9.50 0.50 0.00 0.02 9.75 0.52 0.00 0.03 10.00 0.55 0.01 0.05 10.25 0.58 0.01 0.07 10.50 0.62 0.01 0.10 10.75 0.67 0.02 0.14 11.00 0.72 0.03 0.20 11.25 0.78 0.05 0.30 11.50 0.86 0.07 0.45 11.75 1.18 0.19 2.69 12.00 2.02 0.66 11.04 12.25 2.15 0.75 1.64 12.50 2.24 0.81 1.08 12.75 2.30 0.86 0.80 13.00 2.35 0.89 0.67 13.25 2.40 0.92 0.59 13.50 2.44 0.95 0.52 13.75 2.47 0.98 0.46 14.00 2.50 1.00 0.41 14.25 2.53 1.02 0.38 14.50 2.55 1.04 0.36 14.75 2.58 1.06 0.35 15.00 2.60 1.07 0.33 15.25 2.63 1.09 0.31 15.50 2.65 1.11 0.29 15.75 2.67 1.12 0.28 16.00 2.68 1.14 0.26 16.25 2.70 1.15 0.25 16.50 2.72 1.16 0.24 16.75 2.73 1.17 0.23 17.00 2.75 1.19 0.23 17.25 2.77 1.20 0.22 17.50 2.78 1.21 0.21 17.75 2.80 1.22 0.21 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 1.23 0.20 18.25 2.82 1.24 0.20 18.50 2.84 1.25 0.19 18.75 2.85 1.26 0.18 19.00 2.86 1.27 0.18 19.25 2.87 1.28 0.17 19.50 2.88 1.29 0.16 19.75 2.89 1.30 0.15 20.00 2.90 1.30 0.15 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Summary for Subcatchment 5S: Mite To Bioretention 1 Runoff = 2.37 cfs @ 11.98 hrs, Volume= 0.104 af, Depth> 0.85" Printed 6/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 0.530 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.940 60 Woods, Fair, HSG B 1.470 74 Weighted Average 0.940 63.95% Pervious Area 0.530 36.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Mite To Bioretention 1 Hydrograph ■ Rurwff Type II 24-hr 1-YR Rainfall=3.05" Runoff Area=1.470 ac Runoff Volume=0.104 of Runoff Depth>0.85" Tc=6.0 min CN=74 T-„ 12 13 14 15 16 17 18 19 20 Time (hours) 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 5S: Offsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.67 0.00 0.00 11.00 0.72 0.00 0.00 11.25 0.78 0.00 0.01 11.50 0.86 0.01 0.03 11.75 1.18 0.06 0.36 12.00 2.02 0.36 2.31 12.25 2.15 0.42 0.37 12.50 2.24 0.47 0.25 12.75 2.30 0.50 0.19 13.00 2.35 0.53 0.16 13.25 2.40 0.55 0.14 13.50 2.44 0.57 0.12 13.75 2.47 0.59 0.11 14.00 2.50 0.61 0.10 14.25 2.53 0.62 0.09 14.50 2.55 0.64 0.09 14.75 2.58 0.65 0.08 15.00 2.60 0.67 0.08 15.25 2.63 0.68 0.08 15.50 2.65 0.69 0.07 15.75 2.67 0.70 0.07 16.00 2.68 0.71 0.06 16.25 2.70 0.72 0.06 16.50 2.72 0.73 0.06 16.75 2.73 0.74 0.06 17.00 2.75 0.75 0.06 17.25 2.77 0.76 0.05 17.50 2.78 0.77 0.05 17.75 2.80 0.78 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 0.79 0.05 18.25 2.82 0.80 0.05 18.50 2.84 0.81 0.05 18.75 2.85 0.81 0.05 19.00 2.86 0.82 0.04 19.25 2.87 0.83 0.04 19.50 2.88 0.83 0.04 19.75 2.89 0.84 0.04 20.00 2.90 0.85 0.04 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Printed 6/4/2020 Summary for Subcatchment 7S: To Bioretention 2 Runoff = 4.53 cfs @ 11.97 hrs, Volume= 0.202 af, Depth> 1.44" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN Description 1.040 98 Paved parking, HSG B 0.640 61 >75% Grass cover, Good, HSG B 0.010 60 Woods, Fair, HSG B 1.690 84 Weighted Average 0.650 38.46% Pervious Area 1.040 61.54% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: To Bioretention 2 Hydrograph ■ Rurwff Type II 24-hr 4 i 1-YR Rainfall=3.05" Runoff Area=1.690 ac Runoff Volume=0.202 of 3 Runoff Depth>1.44" Tc=6.0 min 211 U a I I CN=p4 7 8 9 10 11 12 13 14 15 16 17 18 19 Time (hours) 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 7S: To Bioretention 2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.01 9.00 0.45 0.00 0.01 9.25 0.47 0.00 0.01 9.50 0.50 0.01 0.02 9.75 0.52 0.01 0.02 10.00 0.55 0.01 0.03 10.25 0.58 0.02 0.04 10.50 0.62 0.03 0.05 10.75 0.67 0.04 0.07 11.00 0.72 0.05 0.09 11.25 0.78 0.07 0.14 11.50 0.86 0.10 0.20 11.75 1.18 0.24 1.14 12.00 2.02 0.76 4.34 12.25 2.15 0.85 0.63 12.50 2.24 0.92 0.42 12.75 2.30 0.97 0.31 13.00 2.35 1.00 0.26 13.25 2.40 1.04 0.22 13.50 2.44 1.07 0.20 13.75 2.47 1.09 0.18 14.00 2.50 1.12 0.16 14.25 2.53 1.14 0.15 14.50 2.55 1.16 0.14 14.75 2.58 1.18 0.13 15.00 2.60 1.20 0.13 15.25 2.63 1.21 0.12 15.50 2.65 1.23 0.11 15.75 2.67 1.25 0.10 16.00 2.68 1.26 0.10 16.25 2.70 1.27 0.09 16.50 2.72 1.29 0.09 16.75 2.73 1.30 0.09 17.00 2.75 1.31 0.09 17.25 2.77 1.33 0.08 17.50 2.78 1.34 0.08 17.75 2.80 1.35 0.08 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 1.36 0.08 18.25 2.82 1.37 0.07 18.50 2.84 1.38 0.07 18.75 2.85 1.39 0.07 19.00 2.86 1.40 0.07 19.25 2.87 1.41 0.06 19.50 2.88 1.42 0.06 19.75 2.89 1.43 0.06 20.00 2.90 1.44 0.06 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Summary for Pond 6P: BIORETENTION 1 Printed 6/4/2020 Inflow Area = 6.150 ac, 52.68% Impervious, Inflow Depth > 1.19" for 1-YR event Inflow = 13.92 cfs @ 11.98 hrs, Volume= 0.611 of Outflow = 1.88 cfs @ 12.30 hrs, Volume= 0.301 af, Atten= 86%, Lag= 19.6 min Primary = 1.88 cfs @ 12.30 hrs, Volume= 0.301 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 415.10' @ 12.30 hrs Surf.Area= 5,312 sf Storage= 13,947 cf Plug -Flow detention time= 173.3 min calculated for 0.301 of (49% of inflow) Center -of -Mass det. time= 89.1 min ( 884.1 - 795.0 ) Volume Invert Avail.Storage Storage Description #1 407.00' 19,325 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 407.00 3,808 0.0 0 0 411.00 3,808 40.0 6,093 6,093 414.00 3,808 25.0 2,856 8,949 415.00 5,174 100.0 4,491 13,440 416.00 6,596 100.0 5,885 19,325 Device Routing Invert Outlet Devices #1 Primary 409.56' 36.0" Round HDPE_Round 30" L= 37.1' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 409.56' / 409.00' S= 0.0151 T Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 7.07 sf #2 Device 1 415.00' 36.0" Horiz. Orifice/Grate X 2.00 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.85 cfs @ 12.30 hrs HW=415.10' (Free Discharge) t1=HDPE_Round 30" (Passes 1.85 cfs of 68.38 cfs potential flow) t2=04ice/Grate (Weir Controls 1.85 cfs @ 1.02 fps) 2020-05-20 Energy Balance Prepared by Timmons Group W Type // 24-hr 1-YR Rainfall=3.05" Printed 6/4/2020 ������■ IME MEN I""////////'//////////�////��///� Pond 6P: BIORETENTION 1 Stage -Discharge Discharge (ds) ■ InMoa ■ Primary ❑ Primary 2020-05-20 Energy Balance Prepared by Timmons Group Pond 6P: BIORETENTION 1 Stage -Area -Storage Storage (cubic -feet) Type 1124-hr 1-YR Rainfall=3.05" Printed 6/4/2020 ■ Surface ■ Storage 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Pond 6P: BIORETENTION 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 407.00 0.00 5.50 0.00 0 407.00 0.00 6.00 0.00 0 407.00 0.00 6.50 0.00 0 407.00 0.00 7.00 0.00 0 407.00 0.00 7.50 0.00 0 407.00 0.00 8.00 0.00 0 407.00 0.00 8.50 0.00 0 407.00 0.00 9.00 0.00 0 407.00 0.00 9.50 0.02 18 407.01 0.00 10.00 0.05 77 407.05 0.00 10.50 0.10 205 407.13 0.00 11.00 0.20 462 407.30 0.00 11.50 0.48 1,034 407.68 0.00 12.00 13.34 9,744 414.20 0.00 12.50 1.33 13,853 415.08 1.51 13.00 0.83 13,696 415.05 0.88 13.50 0.64 13,642 415.04 0.66 14.00 0.51 13,608 415.03 0.53 14.50 0.45 13,591 415.03 0.46 15.00 0.41 13,580 415.03 0.41 15.50 0.36 13,569 415.02 0.37 16.00 0.32 13,558 415.02 0.33 16.50 0.30 13,552 415.02 0.30 17.00 0.28 13,548 415.02 0.29 17.50 0.27 13,544 415.02 0.27 18.00 0.25 13,540 415.02 0.25 18.50 0.24 13,536 415.02 0.24 19.00 0.22 13,532 415.02 0.22 19.50 0.20 13,527 415.02 0.20 20.00 0.19 13,523 415.02 0.19 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Elevation Primary (feet) (cfs) 407.00 0.00 407.10 0.00 407.20 0.00 407.30 0.00 407.40 0.00 407.50 0.00 407.60 0.00 407.70 0.00 407.80 0.00 407.90 0.00 408.00 0.00 408.10 0.00 408.20 0.00 408.30 0.00 408.40 0.00 408.50 0.00 408.60 0.00 408.70 0.00 408.80 0.00 408.90 0.00 409.00 0.00 409.10 0.00 409.20 0.00 409.30 0.00 409.40 0.00 409.50 0.00 409.60 0.00 409.70 0.00 409.80 0.00 409.90 0.00 410.00 0.00 410.10 0.00 410.20 0.00 410.30 0.00 410.40 0.00 410.50 0.00 410.60 0.00 410.70 0.00 410.80 0.00 410.90 0.00 411.00 0.00 411.10 0.00 411.20 0.00 411.30 0.00 411.40 0.00 411.50 0.00 411.60 0.00 411.70 0.00 411.80 0.00 411.90 0.00 412.00 0.00 412.10 0.00 Type 1124-hr 1-YR Rainfall=3.05" Stage -Discharge for Pond 6P: BIORETENTION 1 Elevation Primary (feet) (cfs) 412.20 0.00 412.30 0.00 412.40 0.00 412.50 0.00 412.60 0.00 412.70 0.00 412.80 0.00 412.90 0.00 413.00 0.00 413.10 0.00 413.20 0.00 413.30 0.00 413.40 0.00 413.50 0.00 413.60 0.00 413.70 0.00 413.80 0.00 413.90 0.00 414.00 0.00 414.10 0.00 414.20 0.00 414.30 0.00 414.40 0.00 414.50 0.00 414.60 0.00 414.70 0.00 414.80 0.00 414.90 0.00 415.00 0.00 415.10 1.95 415.20 5.51 415.30 10.13 415.40 15.59 415.50 21.79 415.60 28.65 415.70 36.10 415.80 44.10 415.90 52.63 416.00 61.64 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Stage -Area -Storage for Pond 6P: BIORETENTION 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 407.00 3,808 0 407.10 3,808 152 407.20 3,808 305 407.30 3,808 457 407.40 3,808 609 407.50 3,808 762 407.60 3,808 914 407.70 3,808 1,066 407.80 3,808 1,219 407.90 3,808 1,371 408.00 3,808 1,523 408.10 3,808 1,676 408.20 3,808 1,828 408.30 3,808 1,980 408.40 3,808 2,132 408.50 3,808 2,285 408.60 3,808 2,437 408.70 3,808 2,589 408.80 3,808 2,742 408.90 3,808 2,894 409.00 3,808 3,046 409.10 3,808 3,199 409.20 3,808 3,351 409.30 3,808 3,503 409.40 3,808 3,656 409.50 3,808 3,808 409.60 3,808 3,960 409.70 3,808 4,113 409.80 3,808 4,265 409.90 3,808 4,417 410.00 3,808 4,570 410.10 3,808 4,722 410.20 3,808 4,874 410.30 3,808 5,027 410.40 3,808 5,179 410.50 3,808 5,331 410.60 3,808 5,484 410.70 3,808 5,636 410.80 3,808 5,788 410.90 3,808 5,940 411.00 3,808 6,093 411.10 3,808 6,188 411.20 3,808 6,283 411.30 3,808 6,378 411.40 3,808 6,474 411.50 3,808 6,569 411.60 3,808 6,664 411.70 3,808 6,759 411.80 3,808 6,854 411.90 3,808 6,950 412.00 3,808 7,045 412.10 3,808 7,140 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 412.20 3,808 7,235 412.30 3,808 7,330 412.40 3,808 7,426 412.50 3,808 7,521 412.60 3,808 7,616 412.70 3,808 7,711 412.80 3,808 7,806 412.90 3,808 7,902 413.00 3,808 7,997 413.10 3,808 8,092 413.20 3,808 8,187 413.30 3,808 8,282 413.40 3,808 8,378 413.50 3,808 8,473 413.60 3,808 8,568 413.70 3,808 8,663 413.80 3,808 8,758 413.90 3,808 8,854 414.00 3,808 8,949 414.10 3,945 9,336 414.20 4,081 9,738 414.30 4,218 10,153 414.40 4,354 10,581 414.50 4,491 11,024 414.60 4,628 11,479 414.70 4,764 11,949 414.80 4,901 12,432 414.90 5,037 12,929 415.00 5,174 13,440 415.10 5,316 13,964 415.20 5,458 14,503 415.30 5,601 15,056 415.40 5,743 15,623 415.50 5,885 16,205 415.60 6,027 16,800 415.70 6,169 17,410 415.80 6,312 18,034 415.90 6,454 18,672 416.00 6,596 19,325 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Summary for Pond 8P: BIORETENTION 2 Printed 6/4/2020 Inflow Area = 1.690 ac, 61.54% Impervious, Inflow Depth > 1.44" for 1-YR event Inflow = 4.53 cfs @ 11.97 hrs, Volume= 0.202 of Outflow = 0.32 cfs @ 12.72 hrs, Volume= 0.075 af, Atten= 93%, Lag= 44.6 min Primary = 0.32 cfs @ 12.72 hrs, Volume= 0.075 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 431.95' @ 12.72 hrs Surf.Area= 2,020 sf Storage= 5,603 cf Plug -Flow detention time= 214.6 min calculated for 0.075 of (37% of inflow) Center -of -Mass det. time= 129.1 min ( 915.7 - 786.7 ) Volume Invert Avail.Storage Storage Description #1 423.91' 10,323 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 423.91 1,587 0.0 0 0 427.91 1,587 40.0 2,539 2,539 430.91 1,587 25.0 1,190 3,729 431.00 1,627 100.0 145 3,874 432.00 2,041 100.0 1,834 5,708 433.00 2,350 100.0 2,196 7,904 434.00 2,489 100.0 2,420 10,323 Device Routino Invert Outlet Devices #1 Primary 424.43' 24.0" Round HDPE_Round 24" L= 61.4' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 424.43' / 423.82' S= 0.0099 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 3.14 sf #2 Device 1 431.91' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.23 cfs @ 12.72 hrs HW=431.95' (Free Discharge) L1=HDPE_Round 24" (Passes 0.23 cfs of 38.62 cfs potential flow) t2=Orifice/Grate (Weir Controls 0.23 cfs @ 0.64 fps) 2020-05-20 Energy Balance Prepared by Timmons Group i c 0 A d W Pond 8P: BIORETENTION 2 Hydrograph Time (hours) Pond 8P: BIORETENTION 2 Stage -Discharge Discharge (ds) Type 1124-hr 1-YR Rainfall=3.05" Printed 6/4/2020 ■ Inflow ■ Pdmary ❑ Primary 2020-05-20 Energy Balance Prepared by Timmons Group Pond 8P: BIORETENTION 2 Stage -Area -Storage Storage (cubic -feet) Type 1124-hr 1-YR Rainfall=3.05" Printed 6/4/2020 ■ Surface ■ Storage 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Pond 8P: BIORETENTION 2 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 423.91 0.00 5.50 0.00 0 423.91 0.00 6.00 0.00 0 423.91 0.00 6.50 0.00 0 423.91 0.00 7.00 0.00 0 423.91 0.00 7.50 0.00 0 423.91 0.00 8.00 0.00 0 423.91 0.00 8.50 0.00 1 423.91 0.00 9.00 0.01 11 423.93 0.00 9.50 0.02 35 423.97 0.00 10.00 0.03 76 424.03 0.00 10.50 0.05 148 424.14 0.00 11.00 0.09 276 424.35 0.00 11.50 0.20 528 424.74 0.00 12.00 4.34 3,547 430.45 0.00 12.50 0.42 5,511 431.90 0.00 13.00 0.26 5,592 431.94 0.27 13.50 0.20 5,576 431.93 0.20 14.00 0.16 5,566 431.93 0.16 14.50 0.14 5,560 431.93 0.14 15.00 0.13 5,557 431.93 0.13 15.50 0.11 5,554 431.92 0.11 16.00 0.10 5,550 431.92 0.10 16.50 0.09 5,548 431.92 0.09 17.00 0.09 5,547 431.92 0.09 17.50 0.08 5,546 431.92 0.08 18.00 0.08 5,545 431.92 0.08 18.50 0.07 5,544 431.92 0.07 19.00 0.07 5,542 431.92 0.07 19.50 0.06 5,541 431.92 0.06 20.00 0.06 5,540 431.92 0.06 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Elevation Primary (feet) (cfs) 423.91 0.00 423.97 0.00 424.03 0.00 424.09 0.00 424.15 0.00 424.21 0.00 424.27 0.00 424.33 0.00 424.39 0.00 424.45 0.00 424.51 0.00 424.57 0.00 424.63 0.00 424.69 0.00 424.75 0.00 424.81 0.00 424.87 0.00 424.93 0.00 424.99 0.00 425.05 0.00 425.11 0.00 425.17 0.00 425.23 0.00 425.29 0.00 425.35 0.00 425.41 0.00 425.47 0.00 425.53 0.00 425.59 0.00 425.65 0.00 425.71 0.00 425.77 0.00 425.83 0.00 425.89 0.00 425.95 0.00 426.01 0.00 426.07 0.00 426.13 0.00 426.19 0.00 426.25 0.00 426.31 0.00 426.37 0.00 426.43 0.00 426.49 0.00 426.55 0.00 426.61 0.00 426.67 0.00 426.73 0.00 426.79 0.00 426.85 0.00 426.91 0.00 426.97 0.00 Type 1124-hr 1-YR Rainfall=3.05" Stage -Discharge for Pond 8P: BIORETENTION 2 Elevation Primary (feet) (cfs) 427.03 0.00 427.09 0.00 427.15 0.00 427.21 0.00 427.27 0.00 427.33 0.00 427.39 0.00 427.45 0.00 427.51 0.00 427.57 0.00 427.63 0.00 427.69 0.00 427.75 0.00 427.81 0.00 427.87 0.00 427.93 0.00 427.99 0.00 428.05 0.00 428.11 0.00 428.17 0.00 428.23 0.00 428.29 0.00 428.35 0.00 428.41 0.00 428.47 0.00 428.53 0.00 428.59 0.00 428.65 0.00 428.71 0.00 428.77 0.00 428.83 0.00 428.89 0.00 428.95 0.00 429.01 0.00 429.07 0.00 429.13 0.00 429.19 0.00 429.25 0.00 429.31 0.00 429.37 0.00 429.43 0.00 429.49 0.00 429.55 0.00 429.61 0.00 429.67 0.00 429.73 0.00 429.79 0.00 429.85 0.00 429.91 0.00 429.97 0.00 430.03 0.00 430.09 0.00 Elevation Primary (feet) (cfs) 430.15 0.00 430.21 0.00 430.27 0.00 430.33 0.00 430.39 0.00 430.45 0.00 430.51 0.00 430.57 0.00 430.63 0.00 430.69 0.00 430.75 0.00 430.81 0.00 430.87 0.00 430.93 0.00 430.99 0.00 431.05 0.00 431.11 0.00 431.17 0.00 431.23 0.00 431.29 0.00 431.35 0.00 431.41 0.00 431.47 0.00 431.53 0.00 431.59 0.00 431.65 0.00 431.71 0.00 431.77 0.00 431.83 0.00 431.89 0.00 431.95 0.25 432.01 0.97 432.07 1.97 432.13 3.18 432.19 4.57 432.25 6.11 432.31 7.80 432.37 9.62 432.43 11.56 432.49 13.61 432.55 15.78 432.61 18.05 432.67 20.42 432.73 22.88 432.79 25.44 432.85 28.09 432.91 30.82 432.97 33.63 433.03 36.02 433.09 36.97 433.15 37.90 433.21 38.81 Printed 6/4/2020 Elevation Primary (feet) (cfs) 433.27 39.69 433.33 40.56 433.39 41.41 433.45 42.24 433.51 43.00 433.57 43.16 433.63 43.32 433.69 43.47 433.75 43.63 433.81 43.79 433.87 43.95 433.93 44.10 433.99 44.26 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 1-YR Rainfall=3.05" Stage -Area -Storage for Pond 8P: BIORETENTION 2 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.91 1,587 0 424.06 1,587 95 424.21 1,587 190 424.36 1,587 286 424.51 1,587 381 424.66 1,587 476 424.81 1,587 571 424.96 1,587 667 425.11 1,587 762 425.26 1,587 857 425.41 1,587 952 425.56 1,587 1,047 425.71 1,587 1,143 425.86 1,587 1,238 426.01 1,587 1,333 426.16 1,587 1,428 426.31 1,587 1,524 426.46 1,587 1,619 426.61 1,587 1,714 426.76 1,587 1,809 426.91 1,587 1,904 427.06 1,587 2,000 427.21 1,587 2,095 427.36 1,587 2,190 427.51 1,587 2,285 427.66 1,587 2,381 427.81 1,587 2,476 427.96 1,587 2,559 428.11 1,587 2,619 428.26 1,587 2,678 428.41 1,587 2,738 428.56 1,587 2,797 428.71 1,587 2,857 428.86 1,587 2,916 429.01 1,587 2,976 429.16 1,587 3,035 429.31 1,587 3,095 429.46 1,587 3,154 429.61 1,587 3,214 429.76 1,587 3,273 429.91 1,587 3,333 430.06 1,587 3,392 430.21 1,587 3,452 430.36 1,587 3,511 430.51 1,587 3,571 430.66 1,587 3,630 430.81 1,587 3,690 430.96 1,609 3,809 431.11 1,673 4,056 431.26 1,735 4,311 431.41 1,797 4,576 431.56 1,859 4,850 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 431.71 1,921 5,134 431.86 1,983 5,426 432.01 2,044 5,729 432.16 2,090 6,039 432.31 2,137 6,356 432.46 2,183 6,680 432.61 2,229 7,011 432.76 2,276 7,348 432.91 2,322 7,693 433.06 2,358 8,045 433.21 2,379 8,400 433.36 2,400 8,759 433.51 2,421 9,120 433.66 2,442 9,485 433.81 2,463 9,853 433.96 2,483 10,224 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 4S: Onsite To Bioretention 1 Runoff = 28.38 cfs @ 11.97 hrs, Volume= 1.309 af, Depth> 3.36" Printed 6/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 2.710 98 Paved parking, HSG B 1.510 61 >75% Grass cover, Good, HSG B 0.460 60 Woods, Fair, HSG B 4.680 82 Weighted Average 1.970 42.09% Pervious Area 2.710 57.91% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 4S: Onsite To Bioretention 1 Hydrograph ■ Rurwff Time (hours) 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 4S: Onsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.01 6.50 0.50 0.00 0.02 6.75 0.52 0.00 0.03 7.00 0.55 0.01 0.05 7.25 0.58 0.01 0.06 7.50 0.61 0.01 0.07 7.75 0.64 0.02 0.09 8.00 0.67 0.02 0.10 8.25 0.70 0.03 0.12 8.50 0.74 0.04 0.15 8.75 0.78 0.05 0.18 9.00 0.82 0.06 0.22 9.25 0.86 0.07 0.24 9.50 0.91 0.08 0.26 9.75 0.96 0.10 0.31 10.00 1.01 0.12 0.37 10.25 1.07 0.14 0.45 10.50 1.14 0.17 0.54 10.75 1.22 0.20 0.68 11.00 1.31 0.25 0.86 11.25 1.43 0.31 1.17 11.50 1.58 0.39 1.61 11.75 2.16 0.76 8.26 12.00 3.70 1.95 26.80 12.25 3.94 2.15 3.76 12.50 4.10 2.29 2.44 12.75 4.21 2.39 1.79 13.00 4.31 2.47 1.50 13.25 4.39 2.54 1.30 13.50 4.46 2.60 1.14 13.75 4.52 2.65 1.01 14.00 4.58 2.70 0.90 14.25 4.63 2.75 0.83 14.50 4.67 2.79 0.79 14.75 4.72 2.83 0.75 15.00 4.76 2.87 0.72 15.25 4.80 2.90 0.68 15.50 4.84 2.94 0.64 15.75 4.88 2.97 0.60 16.00 4.91 3.00 0.55 16.25 4.94 3.03 0.53 16.50 4.97 3.05 0.52 16.75 5.00 3.08 0.50 17.00 5.03 3.11 0.49 17.25 5.06 3.13 0.47 17.50 5.09 3.16 0.46 17.75 5.11 3.18 0.45 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 3.20 0.43 18.25 5.16 3.23 0.42 18.50 5.19 3.25 0.40 18.75 5.21 3.27 0.39 19.00 5.23 3.29 0.37 19.25 5.25 3.31 0.36 19.50 5.27 3.33 0.34 19.75 5.29 3.34 0.33 20.00 5.31 3.36 0.31 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 5S: Mite To Bioretention 1 Runoff = 7.17 cfs @ 11.97 hrs, Volume= 0.320 af, Depth> 2.61" Printed 6/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 0.530 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.940 60 Woods, Fair, HSG B 1.470 74 Weighted Average 0.940 63.95% Pervious Area 0.530 36.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Mite To Bioretention 1 Hydrograph ■ Runoff Time (hours) 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 5S: Offsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.74 0.00 0.00 8.75 0.78 0.00 0.01 9.00 0.82 0.00 0.01 9.25 0.86 0.01 0.02 9.50 0.91 0.01 0.03 9.75 0.96 0.02 0.03 10.00 1.01 0.02 0.05 10.25 1.07 0.03 0.06 10.50 1.14 0.05 0.08 10.75 1.22 0.07 0.11 11.00 1.31 0.09 0.15 11.25 1.43 0.12 0.21 11.50 1.58 0.17 0.31 11.75 2.16 0.43 1.79 12.00 3.70 1.38 6.88 12.25 3.94 1.55 1.01 12.50 4.10 1.67 0.66 12.75 4.21 1.75 0.49 13.00 4.31 1.83 0.41 13.25 4.39 1.89 0.36 13.50 4.46 1.94 0.31 13.75 4.52 1.99 0.28 14.00 4.58 2.03 0.25 14.25 4.63 2.07 0.23 14.50 4.67 2.11 0.22 14.75 4.72 2.14 0.21 15.00 4.76 2.18 0.20 15.25 4.80 2.21 0.19 15.50 4.84 2.24 0.18 15.75 4.88 2.27 0.17 16.00 4.91 2.29 0.15 16.25 4.94 2.32 0.15 16.50 4.97 2.34 0.14 16.75 5.00 2.37 0.14 17.00 5.03 2.39 0.14 17.25 5.06 2.41 0.13 17.50 5.09 2.43 0.13 17.75 5.11 2.46 0.13 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 2.48 0.12 18.25 5.16 2.50 0.12 18.50 5.19 2.51 0.11 18.75 5.21 2.53 0.11 19.00 5.23 2.55 0.11 19.25 5.25 2.57 0.10 19.50 5.27 2.58 0.10 19.75 5.29 2.60 0.09 20.00 5.31 2.62 0.09 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 7S: To Bioretention 2 Runoff = 10.72 cfs @ 11.97 hrs, Volume= 0.500 af, Depth> 3.55" Printed 6/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 1.040 98 Paved parking, HSG B 0.640 61 >75% Grass cover, Good, HSG B 0.010 60 Woods, Fair, HSG B 1.690 84 Weighted Average 0.650 38.46% Pervious Area 1.040 61.54% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: To Bioretention 2 Hydrograph ■ Rurwff Time (hours) 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 7S: To Bioretention 2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.01 6.00 0.45 0.00 0.01 6.25 0.47 0.00 0.01 6.50 0.50 0.01 0.02 6.75 0.52 0.01 0.02 7.00 0.55 0.01 0.03 7.25 0.58 0.02 0.03 7.50 0.61 0.02 0.04 7.75 0.64 0.03 0.04 8.00 0.67 0.04 0.05 8.25 0.70 0.05 0.06 8.50 0.74 0.06 0.07 8.75 0.78 0.07 0.08 9.00 0.82 0.08 0.10 9.25 0.86 0.10 0.11 9.50 0.91 0.11 0.12 9.75 0.96 0.13 0.13 10.00 1.01 0.16 0.16 10.25 1.07 0.18 0.19 10.50 1.14 0.22 0.23 10.75 1.22 0.26 0.28 11.00 1.31 0.31 0.35 11.25 1.43 0.37 0.47 11.50 1.58 0.46 0.64 11.75 2.16 0.86 3.22 12.00 3.70 2.11 10.09 12.25 3.94 2.32 1.40 12.50 4.10 2.46 0.91 12.75 4.21 2.56 0.67 13.00 4.31 2.64 0.56 13.25 4.39 2.72 0.48 13.50 4.46 2.78 0.42 13.75 4.52 2.84 0.38 14.00 4.58 2.88 0.33 14.25 4.63 2.93 0.31 14.50 4.67 2.97 0.29 14.75 4.72 3.01 0.28 15.00 4.76 3.05 0.26 15.25 4.80 3.09 0.25 15.50 4.84 3.13 0.23 15.75 4.88 3.16 0.22 16.00 4.91 3.19 0.21 16.25 4.94 3.22 0.20 16.50 4.97 3.25 0.19 16.75 5.00 3.27 0.19 17.00 5.03 3.30 0.18 17.25 5.06 3.33 0.18 17.50 5.09 3.35 0.17 17.75 5.11 3.37 0.16 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 3.40 0.16 18.25 5.16 3.42 0.15 18.50 5.19 3.44 0.15 18.75 5.21 3.46 0.14 19.00 5.23 3.48 0.14 19.25 5.25 3.50 0.13 19.50 5.27 3.52 0.13 19.75 5.29 3.54 0.12 20.00 5.31 3.56 0.12 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Summary for Pond 6P: BIORETENTION 1 Printed 6/4/2020 Inflow Area = 6.150 ac, 52.68% Impervious, Inflow Depth > 3.18" for 10-YR event Inflow = 35.54 cfs @ 11.97 hrs, Volume= 1.628 of Outflow = 34.62 cfs @ 11.99 hrs, Volume= 1.317 af, Atten= 3%, Lag= 1.4 min Primary = 34.62 cfs @ 11.99 hrs, Volume= 1.317 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 415.68' @ 11.99 hrs Surf.Area= 6,141 sf Storage= 17,288 cf Plug -Flow detention time= 82.3 min calculated for 1.317 of (81% of inflow) Center -of -Mass det. time= 29.0 min ( 803.1 - 774.2 ) Volume Invert Avail.Storage Storage Description #1 407.00' 19,325 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 407.00 3,808 0.0 0 0 411.00 3,808 40.0 6,093 6,093 414.00 3,808 25.0 2,856 8,949 415.00 5,174 100.0 4,491 13,440 416.00 6,596 100.0 5,885 19,325 Device Routing Invert Outlet Devices #1 Primary 409.56' 36.0" Round HDPE_Round 30" L= 37.1' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 409.56' / 409.00' S= 0.0151 T Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 7.07 sf #2 Device 1 415.00' 36.0" Horiz. Orifice/Grate X 2.00 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=33.79 cfs @ 11.99 hrs HW=415.67' (Free Discharge) t1=HDPE_Round 30" (Passes 33.79 cfs of 73.07 cfs potential flow) t2=04ice/Grate (Weir Controls 33.79 cfs @ 2.68 fps) 2020-05-20 Energy Balance Prepared by Timmons Group W Type /l 24-hr 10-YR Rainfall=5.58" Pond 6P: BIORETENTION 1 Hydrograph Time (hours) Pond 6P: BIORETENTION 1 Stage -Discharge Discharge ids) Printed 6/4/2020 ■ Inflow ■ Primary ❑ Primary 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 10-YR Rainfall=5.58" Pond 6P: BIORETENTION 7 Stage -Area -Storage Storage (cubic -feet) Printed 6/4/2020 ■ Surface ■ Storage 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Pond 6P: BIORETENTION 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 407.00 0.00 5.50 0.00 0 407.00 0.00 6.00 0.00 0 407.00 0.00 6.50 0.02 19 407.01 0.00 7.00 0.05 79 407.05 0.00 7.50 0.07 184 407.12 0.00 8.00 0.10 338 407.22 0.00 8.50 0.15 558 407.37 0.00 9.00 0.23 900 407.59 0.00 9.50 0.29 1,374 407.90 0.00 10.00 0.41 1,993 408.31 0.00 10.50 0.62 2,913 408.91 0.00 11.00 1.00 4,349 409.86 0.00 11.50 1.93 6,886 411.83 0.00 12.00 33.67 17,275 415.68 34.46 12.50 3.10 14,183 415.14 3.37 13.00 1.91 13,969 415.10 1.98 13.50 1.46 13,855 415.08 1.51 14.00 1.15 13,774 415.06 1.19 14.50 1.01 13,734 415.06 1.03 15.00 0.91 13,709 415.05 0.93 15.50 0.81 13,683 415.05 0.83 16.00 0.71 13,658 415.04 0.72 16.50 0.66 13,643 415.04 0.67 17.00 0.63 13,634 415.04 0.63 17.50 0.59 13,625 415.04 0.59 18.00 0.55 13,616 415.03 0.56 18.50 0.52 13,607 415.03 0.52 19.00 0.48 13,597 415.03 0.48 19.50 0.44 13,588 415.03 0.45 20.00 0.40 13,579 415.03 0.41 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Elevation Primary (feet) (cfs) 407.00 0.00 407.10 0.00 407.20 0.00 407.30 0.00 407.40 0.00 407.50 0.00 407.60 0.00 407.70 0.00 407.80 0.00 407.90 0.00 408.00 0.00 408.10 0.00 408.20 0.00 408.30 0.00 408.40 0.00 408.50 0.00 408.60 0.00 408.70 0.00 408.80 0.00 408.90 0.00 409.00 0.00 409.10 0.00 409.20 0.00 409.30 0.00 409.40 0.00 409.50 0.00 409.60 0.00 409.70 0.00 409.80 0.00 409.90 0.00 410.00 0.00 410.10 0.00 410.20 0.00 410.30 0.00 410.40 0.00 410.50 0.00 410.60 0.00 410.70 0.00 410.80 0.00 410.90 0.00 411.00 0.00 411.10 0.00 411.20 0.00 411.30 0.00 411.40 0.00 411.50 0.00 411.60 0.00 411.70 0.00 411.80 0.00 411.90 0.00 412.00 0.00 412.10 0.00 Type/1 24-hr 10-YR Rainfall=5.58" Stage -Discharge for Pond 6P: BIORETENTION 1 Elevation Primary (feet) (cfs) 412.20 0.00 412.30 0.00 412.40 0.00 412.50 0.00 412.60 0.00 412.70 0.00 412.80 0.00 412.90 0.00 413.00 0.00 413.10 0.00 413.20 0.00 413.30 0.00 413.40 0.00 413.50 0.00 413.60 0.00 413.70 0.00 413.80 0.00 413.90 0.00 414.00 0.00 414.10 0.00 414.20 0.00 414.30 0.00 414.40 0.00 414.50 0.00 414.60 0.00 414.70 0.00 414.80 0.00 414.90 0.00 415.00 0.00 415.10 1.95 415.20 5.51 415.30 10.13 415.40 15.59 415.50 21.79 415.60 28.65 415.70 36.10 415.80 44.10 415.90 52.63 416.00 61.64 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Stage -Area -Storage for Pond 6P: BIORETENTION 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 407.00 3,808 0 407.10 3,808 152 407.20 3,808 305 407.30 3,808 457 407.40 3,808 609 407.50 3,808 762 407.60 3,808 914 407.70 3,808 1,066 407.80 3,808 1,219 407.90 3,808 1,371 408.00 3,808 1,523 408.10 3,808 1,676 408.20 3,808 1,828 408.30 3,808 1,980 408.40 3,808 2,132 408.50 3,808 2,285 408.60 3,808 2,437 408.70 3,808 2,589 408.80 3,808 2,742 408.90 3,808 2,894 409.00 3,808 3,046 409.10 3,808 3,199 409.20 3,808 3,351 409.30 3,808 3,503 409.40 3,808 3,656 409.50 3,808 3,808 409.60 3,808 3,960 409.70 3,808 4,113 409.80 3,808 4,265 409.90 3,808 4,417 410.00 3,808 4,570 410.10 3,808 4,722 410.20 3,808 4,874 410.30 3,808 5,027 410.40 3,808 5,179 410.50 3,808 5,331 410.60 3,808 5,484 410.70 3,808 5,636 410.80 3,808 5,788 410.90 3,808 5,940 411.00 3,808 6,093 411.10 3,808 6,188 411.20 3,808 6,283 411.30 3,808 6,378 411.40 3,808 6,474 411.50 3,808 6,569 411.60 3,808 6,664 411.70 3,808 6,759 411.80 3,808 6,854 411.90 3,808 6,950 412.00 3,808 7,045 412.10 3,808 7,140 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 412.20 3,808 7,235 412.30 3,808 7,330 412.40 3,808 7,426 412.50 3,808 7,521 412.60 3,808 7,616 412.70 3,808 7,711 412.80 3,808 7,806 412.90 3,808 7,902 413.00 3,808 7,997 413.10 3,808 8,092 413.20 3,808 8,187 413.30 3,808 8,282 413.40 3,808 8,378 413.50 3,808 8,473 413.60 3,808 8,568 413.70 3,808 8,663 413.80 3,808 8,758 413.90 3,808 8,854 414.00 3,808 8,949 414.10 3,945 9,336 414.20 4,081 9,738 414.30 4,218 10,153 414.40 4,354 10,581 414.50 4,491 11,024 414.60 4,628 11,479 414.70 4,764 11,949 414.80 4,901 12,432 414.90 5,037 12,929 415.00 5,174 13,440 415.10 5,316 13,964 415.20 5,458 14,503 415.30 5,601 15,056 415.40 5,743 15,623 415.50 5,885 16,205 415.60 6,027 16,800 415.70 6,169 17,410 415.80 6,312 18,034 415.90 6,454 18,672 416.00 6,596 19,325 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Summary for Pond 8P: BIORETENTION 2 Printed 6/4/2020 Inflow Area = 1.690 ac, 61.54% Impervious, Inflow Depth > 3.55" for 10-YR event Inflow = 10.72 cfs @ 11.97 hrs, Volume= 0.500 of Outflow = 10.53 cfs @ 11.99 hrs, Volume= 0.373 af, Atten= 2%, Lag= 1.2 min Primary = 10.53 cfs @ 11.99 hrs, Volume= 0.373 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 432.40' @ 11.99 hrs Surf.Area= 2,164 sf Storage= 6,546 cf Plug -Flow detention time= 99.9 min calculated for 0.373 of (75% of inflow) Center -of -Mass det. time= 38.6 min ( 805.0 - 766.4 ) Volume Invert Avail.Storage Storage Description #1 423.91' 10,323 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 423.91 1,587 0.0 0 0 427.91 1,587 40.0 2,539 2,539 430.91 1,587 25.0 1,190 3,729 431.00 1,627 100.0 145 3,874 432.00 2,041 100.0 1,834 5,708 433.00 2,350 100.0 2,196 7,904 434.00 2,489 100.0 2,420 10,323 Device Routino Invert Outlet Devices #1 Primary 424.43' 24.0" Round HDPE_Round 24" L= 61.4' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 424.43' / 423.82' S= 0.0099 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 3.14 sf #2 Device 1 431.91' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=10.20 cfs @ 11.99 hrs HW=432.39' (Free Discharge) L1=HDPE_Round 24" (Passes 10.20 cfs of 39.90 cfs potential flow) t2=Orifice/Grate (Weir Controls 10.20 cfs @ 2.26 fps) 2020-05-20 Energy Balance Prepared by Timmons Group i c 0 A d W Type /l 24-hr 10-YR Rainfall=5.58" Printed 6/4/2020 Pond 8P: BIORETENTION 2 Hydrograph /MMMMM �MMMMM.. pE !EC ...-. �' / ".MMMM"M .---- wwwww"" pEi E pECC! i eF CCC i I.M.M. I.M.M. S - - • . • .---. MMMMM M .---- ------- .---- ------- ....... I� .-.-. .... ... o, 5 ........ . 67891017 8 8 99 1010 1 it 12 13 14 15 16 17 18 19 20 Time (hours) Pond 8P: BIORETENTION 2 Stage -Discharge Discharge (ds) ■ Inflow ■ Primary ❑ Primary 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 10-YR Rainfall=5.58" Pond 8P: BIORETENTION 2 Stage -Area -Storage Storage (cubic -feet) Printed 6/4/2020 ■ Surface ■ Storage 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Pond 8P: BIORETENTION 2 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 423.91 0.00 5.50 0.00 0 423.91 0.00 6.00 0.01 10 423.93 0.00 6.50 0.02 35 423.97 0.00 7.00 0.03 77 424.03 0.00 7.50 0.04 137 424.13 0.00 8.00 0.05 216 424.25 0.00 8.50 0.07 322 424.42 0.00 9.00 0.10 472 424.65 0.00 9.50 0.12 666 424.96 0.00 10.00 0.16 905 425.34 0.00 10.50 0.23 1,245 425.87 0.00 11.00 0.35 1,753 426.67 0.00 11.50 0.64 2,616 428.10 0.00 12.00 10.09 6,538 432.39 10.41 12.50 0.91 5,725 432.01 0.97 13.00 0.56 5,668 431.98 0.58 13.50 0.42 5,633 431.96 0.44 14.00 0.33 5,610 431.95 0.34 14.50 0.29 5,599 431.95 0.30 15.00 0.26 5,592 431.94 0.27 15.50 0.23 5,584 431.94 0.24 16.00 0.21 5,577 431.94 0.21 16.50 0.19 5,573 431.93 0.19 17.00 0.18 5,570 431.93 0.18 17.50 0.17 5,568 431.93 0.17 18.00 0.16 5,565 431.93 0.16 18.50 0.15 5,563 431.93 0.15 19.00 0.14 5,560 431.93 0.14 19.50 0.13 5,557 431.93 0.13 20.00 0.12 5,555 431.92 0.12 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Elevation Primary (feet) (cfs) 423.91 0.00 423.97 0.00 424.03 0.00 424.09 0.00 424.15 0.00 424.21 0.00 424.27 0.00 424.33 0.00 424.39 0.00 424.45 0.00 424.51 0.00 424.57 0.00 424.63 0.00 424.69 0.00 424.75 0.00 424.81 0.00 424.87 0.00 424.93 0.00 424.99 0.00 425.05 0.00 425.11 0.00 425.17 0.00 425.23 0.00 425.29 0.00 425.35 0.00 425.41 0.00 425.47 0.00 425.53 0.00 425.59 0.00 425.65 0.00 425.71 0.00 425.77 0.00 425.83 0.00 425.89 0.00 425.95 0.00 426.01 0.00 426.07 0.00 426.13 0.00 426.19 0.00 426.25 0.00 426.31 0.00 426.37 0.00 426.43 0.00 426.49 0.00 426.55 0.00 426.61 0.00 426.67 0.00 426.73 0.00 426.79 0.00 426.85 0.00 426.91 0.00 426.97 0.00 Type /l 24-hr 10-YR Rainfall=5.58" Stage -Discharge for Pond 8P: BIORETENTION 2 Elevation Primary (feet) (cfs) 427.03 0.00 427.09 0.00 427.15 0.00 427.21 0.00 427.27 0.00 427.33 0.00 427.39 0.00 427.45 0.00 427.51 0.00 427.57 0.00 427.63 0.00 427.69 0.00 427.75 0.00 427.81 0.00 427.87 0.00 427.93 0.00 427.99 0.00 428.05 0.00 428.11 0.00 428.17 0.00 428.23 0.00 428.29 0.00 428.35 0.00 428.41 0.00 428.47 0.00 428.53 0.00 428.59 0.00 428.65 0.00 428.71 0.00 428.77 0.00 428.83 0.00 428.89 0.00 428.95 0.00 429.01 0.00 429.07 0.00 429.13 0.00 429.19 0.00 429.25 0.00 429.31 0.00 429.37 0.00 429.43 0.00 429.49 0.00 429.55 0.00 429.61 0.00 429.67 0.00 429.73 0.00 429.79 0.00 429.85 0.00 429.91 0.00 429.97 0.00 430.03 0.00 430.09 0.00 Elevation Primary (feet) (cfs) 430.15 0.00 430.21 0.00 430.27 0.00 430.33 0.00 430.39 0.00 430.45 0.00 430.51 0.00 430.57 0.00 430.63 0.00 430.69 0.00 430.75 0.00 430.81 0.00 430.87 0.00 430.93 0.00 430.99 0.00 431.05 0.00 431.11 0.00 431.17 0.00 431.23 0.00 431.29 0.00 431.35 0.00 431.41 0.00 431.47 0.00 431.53 0.00 431.59 0.00 431.65 0.00 431.71 0.00 431.77 0.00 431.83 0.00 431.89 0.00 431.95 0.25 432.01 0.97 432.07 1.97 432.13 3.18 432.19 4.57 432.25 6.11 432.31 7.80 432.37 9.62 432.43 11.56 432.49 13.61 432.55 15.78 432.61 18.05 432.67 20.42 432.73 22.88 432.79 25.44 432.85 28.09 432.91 30.82 432.97 33.63 433.03 36.02 433.09 36.97 433.15 37.90 433.21 38.81 Printed 6/4/2020 Elevation Primary (feet) (cfs) 433.27 39.69 433.33 40.56 433.39 41.41 433.45 42.24 433.51 43.00 433.57 43.16 433.63 43.32 433.69 43.47 433.75 43.63 433.81 43.79 433.87 43.95 433.93 44.10 433.99 44.26 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 10-YR Rainfall=5.58" Stage -Area -Storage for Pond 8P: BIORETENTION 2 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.91 1,587 0 424.06 1,587 95 424.21 1,587 190 424.36 1,587 286 424.51 1,587 381 424.66 1,587 476 424.81 1,587 571 424.96 1,587 667 425.11 1,587 762 425.26 1,587 857 425.41 1,587 952 425.56 1,587 1,047 425.71 1,587 1,143 425.86 1,587 1,238 426.01 1,587 1,333 426.16 1,587 1,428 426.31 1,587 1,524 426.46 1,587 1,619 426.61 1,587 1,714 426.76 1,587 1,809 426.91 1,587 1,904 427.06 1,587 2,000 427.21 1,587 2,095 427.36 1,587 2,190 427.51 1,587 2,285 427.66 1,587 2,381 427.81 1,587 2,476 427.96 1,587 2,559 428.11 1,587 2,619 428.26 1,587 2,678 428.41 1,587 2,738 428.56 1,587 2,797 428.71 1,587 2,857 428.86 1,587 2,916 429.01 1,587 2,976 429.16 1,587 3,035 429.31 1,587 3,095 429.46 1,587 3,154 429.61 1,587 3,214 429.76 1,587 3,273 429.91 1,587 3,333 430.06 1,587 3,392 430.21 1,587 3,452 430.36 1,587 3,511 430.51 1,587 3,571 430.66 1,587 3,630 430.81 1,587 3,690 430.96 1,609 3,809 431.11 1,673 4,056 431.26 1,735 4,311 431.41 1,797 4,576 431.56 1,859 4,850 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 431.71 1,921 5,134 431.86 1,983 5,426 432.01 2,044 5,729 432.16 2,090 6,039 432.31 2,137 6,356 432.46 2,183 6,680 432.61 2,229 7,011 432.76 2,276 7,348 432.91 2,322 7,693 433.06 2,358 8,045 433.21 2,379 8,400 433.36 2,400 8,759 433.51 2,421 9,120 433.66 2,442 9,485 433.81 2,463 9,853 433.96 2,483 10,224 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Summary for Subcatchment 4S: Onsite To Bioretention 1 Runoff = 52.96 cfs @ 11.96 hrs, Volume= 2.547 af, Depth> 6.53" Printed 6/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN 2.710 98 Paved parking, HSG B 1.510 61 >75% Grass cover, Good, HSG B 0.460 60 Woods, Fair, HSG B 4.680 82 Weighted Average 1.970 42.09% Pervious Area 2.710 57.91% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, •Eli ----- --- --- TY 1 .---- / Iowa ANN Mon Runoff Di. 0 a Aw Runoff Volumi, 1 ___ I _____ ■ ____ 1 1, Time (hours) ■ Rurwff 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 4S: Onsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.01 0.07 5.25 0.61 0.01 0.09 5.50 0.65 0.02 0.12 5.75 0.69 0.03 0.14 6.00 0.73 0.03 0.16 6.25 0.77 0.04 0.19 6.50 0.82 0.06 0.21 6.75 0.86 0.07 0.24 7.00 0.91 0.08 0.27 7.25 0.95 0.10 0.29 7.50 1.00 0.11 0.32 7.75 1.05 0.13 0.35 8.00 1.10 0.15 0.38 8.25 1.15 0.17 0.43 8.50 1.21 0.20 0.50 8.75 1.28 0.23 0.58 9.00 1.35 0.27 0.66 9.25 1.42 0.30 0.71 9.50 1.49 0.34 0.74 9.75 1.57 0.39 0.83 10.00 1.66 0.44 0.96 10.25 1.76 0.49 1.14 10.50 1.87 0.56 1.34 10.75 2.00 0.65 1.64 11.00 2.15 0.75 1.99 11.25 2.34 0.89 2.65 11.50 2.59 1.07 3.52 11.75 3.54 1.82 16.93 12.00 6.07 4.05 49.46 12.25 6.47 4.42 6.75 12.50 6.73 4.67 4.36 12.75 6.92 4.84 3.19 13.00 7.07 4.98 2.67 13.25 7.20 5.11 2.30 13.50 7.32 5.22 2.02 13.75 7.42 5.31 1.79 14.00 7.51 5.40 1.58 14.25 7.59 5.48 1.47 14.50 7.67 5.55 1.40 14.75 7.75 5.62 1.33 15.00 7.82 5.69 1.25 15.25 7.88 5.75 1.18 15.50 7.95 5.81 1.11 15.75 8.01 5.87 1.04 16.00 8.06 5.92 0.97 16.25 8.11 5.97 0.93 16.50 8.16 6.01 0.90 16.75 8.21 6.06 0.88 17.00 8.26 6.11 0.85 17.25 8.31 6.15 0.83 17.50 8.35 6.19 0.80 17.75 8.39 6.23 0.78 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 6.27 0.75 18.25 8.48 6.31 0.73 18.50 8.52 6.35 0.70 18.75 8.55 6.39 0.67 19.00 8.59 6.42 0.65 19.25 8.62 6.45 0.62 19.50 8.66 6.49 0.60 19.75 8.69 6.52 0.57 20.00 8.72 6.55 0.55 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Summary for Subcatchment 5S: Mite To Bioretention 1 Runoff = 14.76 cfs @ 11.97 hrs, Volume= 0.682 af, Depth> 5.57" Printed 6/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN 0.530 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.940 60 Woods, Fair, HSG B 1.470 74 Weighted Average 0.940 63.95% Pervious Area 0.530 36.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Mite To Bioretention 1 Hydrograph ■ Rurwff Time (hours) 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 5S: Offsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.00 0.00 5.25 0.61 0.00 0.00 5.50 0.65 0.00 0.00 5.75 0.69 0.00 0.00 6.00 0.73 0.00 0.00 6.25 0.77 0.00 0.01 6.50 0.82 0.00 0.01 6.75 0.86 0.01 0.02 7.00 0.91 0.01 0.03 7.25 0.95 0.02 0.03 7.50 1.00 0.02 0.04 7.75 1.05 0.03 0.05 8.00 1.10 0.04 0.05 8.25 1.15 0.05 0.07 8.50 1.21 0.06 0.08 8.75 1.28 0.08 0.10 9.00 1.35 0.10 0.12 9.25 1.42 0.12 0.13 9.50 1.49 0.15 0.14 9.75 1.57 0.17 0.16 10.00 1.66 0.20 0.19 10.25 1.76 0.24 0.24 10.50 1.87 0.29 0.29 10.75 2.00 0.35 0.36 11.00 2.15 0.42 0.45 11.25 2.34 0.52 0.62 11.50 2.59 0.66 0.85 11.75 3.54 1.27 4.32 12.00 6.07 3.25 13.93 12.25 6.47 3.58 1.95 12.50 6.73 3.81 1.27 12.75 6.92 3.97 0.93 13.00 7.07 4.10 0.78 13.25 7.20 4.22 0.67 13.50 7.32 4.32 0.59 13.75 7.42 4.41 0.52 14.00 7.51 4.49 0.47 14.25 7.59 4.56 0.43 14.50 7.67 4.63 0.41 14.75 7.75 4.70 0.39 15.00 7.82 4.76 0.37 15.25 7.88 4.82 0.35 15.50 7.95 4.88 0.33 15.75 8.01 4.93 0.31 16.00 8.06 4.98 0.29 16.25 8.11 5.03 0.28 16.50 8.16 5.07 0.27 16.75 8.21 5.12 0.26 17.00 8.26 5.16 0.25 17.25 8.31 5.20 0.25 17.50 8.35 5.24 0.24 17.75 8.39 5.28 0.23 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 5.32 0.22 18.25 8.48 5.35 0.22 18.50 8.52 5.39 0.21 18.75 8.55 5.42 0.20 19.00 8.59 5.46 0.19 19.25 8.62 5.49 0.19 19.50 8.66 5.52 0.18 19.75 8.69 5.55 0.17 20.00 8.72 5.57 0.16 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Printed 6/4/2020 Summary for Subcatchment 7S: To Bioretention 2 Runoff = 19.58 cfs @ 11.96 hrs, Volume= 0.953 af, Depth> 6.77" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN Description 1.040 98 Paved parking, HSG B 0.640 61 >75% Grass cover, Good, HSG B 0.010 60 Woods, Fair, HSG B 1.690 84 Weighted Average 0.650 38.46% Pervious Area 1.040 61.54% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: To Bioretention 2 Hydrograph • / min 5. 6 7....8....9....1,0.. 1,1....1,2....1,9....1,4.. 1,5....16 17 18 19 20 Time (hours) E Runoff 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 7S: To Bioretention 2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.02 0.04 5.25 0.61 0.03 0.05 5.50 0.65 0.03 0.06 5.75 0.69 0.04 0.07 6.00 0.73 0.05 0.08 6.25 0.77 0.07 0.09 6.50 0.82 0.08 0.10 6.75 0.86 0.10 0.11 7.00 0.91 0.11 0.12 7.25 0.95 0.13 0.13 7.50 1.00 0.15 0.14 7.75 1.05 0.17 0.15 8.00 1.10 0.20 0.16 8.25 1.15 0.22 0.18 8.50 1.21 0.25 0.21 8.75 1.28 0.29 0.24 9.00 1.35 0.32 0.27 9.25 1.42 0.37 0.29 9.50 1.49 0.41 0.30 9.75 1.57 0.46 0.33 10.00 1.66 0.51 0.38 10.25 1.76 0.58 0.45 10.50 1.87 0.65 0.53 10.75 2.00 0.74 0.64 11.00 2.15 0.85 0.77 11.25 2.34 1.00 1.02 11.50 2.59 1.19 1.35 11.75 3.54 1.97 6.38 12.00 6.07 4.26 18.25 12.25 6.47 4.64 2.48 12.50 6.73 4.89 1.60 12.75 6.92 5.06 1.17 13.00 7.07 5.21 0.98 13.25 7.20 5.33 0.84 13.50 7.32 5.44 0.74 13.75 7.42 5.54 0.65 14.00 7.51 5.63 0.58 14.25 7.59 5.71 0.54 14.50 7.67 5.78 0.51 14.75 7.75 5.85 0.48 15.00 7.82 5.92 0.46 15.25 7.88 5.98 0.43 15.50 7.95 6.04 0.41 15.75 8.01 6.10 0.38 16.00 8.06 6.15 0.35 16.25 8.11 6.20 0.34 16.50 8.16 6.25 0.33 16.75 8.21 6.30 0.32 17.00 8.26 6.35 0.31 17.25 8.31 6.39 0.30 17.50 8.35 6.43 0.29 17.75 8.39 6.47 0.28 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 6.51 0.27 18.25 8.48 6.55 0.26 18.50 8.52 6.59 0.26 18.75 8.55 6.63 0.25 19.00 8.59 6.66 0.24 19.25 8.62 6.70 0.23 19.50 8.66 6.73 0.22 19.75 8.69 6.76 0.21 20.00 8.72 6.79 0.20 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Summary for Pond 6P: BIORETENTION 1 [82] Warning: Early inflow requires earlier time span [93] Warning: Storage range exceeded by 0.09' [88] Warning: Qout>Qin may require smaller dt or Finer Routing Printed 6/4/2020 Inflow Area = 6.150 ac, 52.68% Impervious, Inflow Depth > 6.30" for 100-YR event Inflow = 67.71 cfs @ 11.97 hrs, Volume= 3.229 of Outflow = 69.62 cfs @ 11.99 hrs, Volume= 2.916 af, Atten= 0%, Lag= 1.4 min Primary = 69.62 cfs @ 11.99 hrs, Volume= 2.916 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 416.09' @ 11.99 hrs Surf.Area= 6,596 sf Storage= 19,325 cf Plug -Flow detention time= 57.4 min calculated for 2.916 of (90% of inflow) Center -of -Mass det. time= 23.5 min ( 782.4 - 758.8 ) Volume Invert Avail.Storage Storage Description #1 407.00' 19,325 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 407.00 3,808 0.0 0 0 411.00 3,808 40.0 6,093 6,093 414.00 3,808 25.0 2,856 8,949 415.00 5,174 100.0 4,491 13,440 416.00 6,596 100.0 5,885 19,325 Device Routing Invert Outlet Devices #1 Primary 409.56' 36.0" Round HDPE_Round 30" L= 37.1' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 409.56' / 409.00' S= 0.0151 T Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 7.07 sf #2 Device 1 415.00' 36.0" Horiz. Orifice/Grate X 2.00 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=66.83 cfs @ 11.99 hrs HW=416.06' (Free Discharge) t1=HDPE_Round 30" (Passes 66.83 cfs of 76.07 cfs potential flow) L2=04ice/Grate (Weir Controls 66.83 cfs @ 3.36 fps) 2020-05-20 Energy Balance Prepared by Timmons Group 75 70 65 60 55 50 � 45 40 3 C 35 30 25 20 15 10 5 0 W Type 1124-hr 100-YR Rainfall=9.16" Printed 6/4/2020 Pond 6P: BIORETENTION 1 Hydrograph 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 6P: BIORETENTION 1 Stage -Discharge Discharge ids) ■ Inflow ■ Primary ❑ Primary 2020-05-20 Energy Balance Prepared by Timmons Group 500 Type 1124-hr 100-YR Rainfall=9.16" Printed 6/4/2020 Pond 6P: BIORETENTION 1 Stage -Area -Storage Surface/Horizontal/Wetted Area (sq-f ) 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500 6,000 6,500 ■ Surface ■ Storage Storage (cubic -feet) 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Hydrograph for Pond 6P: BIORETENTION 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.07 6 407.00 0.00 5.50 0.12 175 407.11 0.00 6.00 0.17 426 407.28 0.00 6.50 0.23 780 407.51 0.00 7.00 0.29 1,249 407.82 0.00 7.50 0.36 1,839 408.21 0.00 8.00 0.43 2,554 408.68 0.00 8.50 0.58 3,453 409.27 0.00 9.00 0.78 4,670 410.07 0.00 9.50 0.88 6,180 411.09 0.00 10.00 1.16 7,981 412.98 0.00 10.50 1.63 10,465 414.37 0.00 11.00 2.44 13,853 415.08 1.50 11.50 4.37 14,306 415.16 4.18 12.00 63.39 19,325 416.08 68.74 12.50 5.62 14,561 415.21 6.02 13.00 3.45 14,212 415.15 3.56 13.50 2.61 14,075 415.12 2.67 14.00 2.05 13,987 415.10 2.10 14.50 1.81 13,935 415.09 1.83 15.00 1.63 13,890 415.09 1.65 15.50 1.44 13,844 415.08 1.47 16.00 1.26 13,798 415.07 1.28 16.50 1.17 13,772 415.06 1.18 17.00 1.11 13,755 415.06 1.12 17.50 1.04 13,739 415.06 1.05 18.00 0.97 13,723 415.05 0.98 18.50 0.91 13,706 415.05 0.92 19.00 0.84 13,689 415.05 0.85 19.50 0.78 13,673 415.04 0.79 20.00 0.71 13,656 415.04 0.72 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Elevation Primary (feet) (cfs) 407.00 0.00 407.10 0.00 407.20 0.00 407.30 0.00 407.40 0.00 407.50 0.00 407.60 0.00 407.70 0.00 407.80 0.00 407.90 0.00 408.00 0.00 408.10 0.00 408.20 0.00 408.30 0.00 408.40 0.00 408.50 0.00 408.60 0.00 408.70 0.00 408.80 0.00 408.90 0.00 409.00 0.00 409.10 0.00 409.20 0.00 409.30 0.00 409.40 0.00 409.50 0.00 409.60 0.00 409.70 0.00 409.80 0.00 409.90 0.00 410.00 0.00 410.10 0.00 410.20 0.00 410.30 0.00 410.40 0.00 410.50 0.00 410.60 0.00 410.70 0.00 410.80 0.00 410.90 0.00 411.00 0.00 411.10 0.00 411.20 0.00 411.30 0.00 411.40 0.00 411.50 0.00 411.60 0.00 411.70 0.00 411.80 0.00 411.90 0.00 412.00 0.00 412.10 0.00 Type/1 24-hr 100-YR Rainfall=9.16" Stage -Discharge for Pond 6P: BIORETENTION 1 Elevation Primary (feet) (cfs) 412.20 0.00 412.30 0.00 412.40 0.00 412.50 0.00 412.60 0.00 412.70 0.00 412.80 0.00 412.90 0.00 413.00 0.00 413.10 0.00 413.20 0.00 413.30 0.00 413.40 0.00 413.50 0.00 413.60 0.00 413.70 0.00 413.80 0.00 413.90 0.00 414.00 0.00 414.10 0.00 414.20 0.00 414.30 0.00 414.40 0.00 414.50 0.00 414.60 0.00 414.70 0.00 414.80 0.00 414.90 0.00 415.00 0.00 415.10 1.95 415.20 5.51 415.30 10.13 415.40 15.59 415.50 21.79 415.60 28.65 415.70 36.10 415.80 44.10 415.90 52.63 416.00 61.64 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Stage -Area -Storage for Pond 6P: BIORETENTION 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 407.00 3,808 0 407.10 3,808 152 407.20 3,808 305 407.30 3,808 457 407.40 3,808 609 407.50 3,808 762 407.60 3,808 914 407.70 3,808 1,066 407.80 3,808 1,219 407.90 3,808 1,371 408.00 3,808 1,523 408.10 3,808 1,676 408.20 3,808 1,828 408.30 3,808 1,980 408.40 3,808 2,132 408.50 3,808 2,285 408.60 3,808 2,437 408.70 3,808 2,589 408.80 3,808 2,742 408.90 3,808 2,894 409.00 3,808 3,046 409.10 3,808 3,199 409.20 3,808 3,351 409.30 3,808 3,503 409.40 3,808 3,656 409.50 3,808 3,808 409.60 3,808 3,960 409.70 3,808 4,113 409.80 3,808 4,265 409.90 3,808 4,417 410.00 3,808 4,570 410.10 3,808 4,722 410.20 3,808 4,874 410.30 3,808 5,027 410.40 3,808 5,179 410.50 3,808 5,331 410.60 3,808 5,484 410.70 3,808 5,636 410.80 3,808 5,788 410.90 3,808 5,940 411.00 3,808 6,093 411.10 3,808 6,188 411.20 3,808 6,283 411.30 3,808 6,378 411.40 3,808 6,474 411.50 3,808 6,569 411.60 3,808 6,664 411.70 3,808 6,759 411.80 3,808 6,854 411.90 3,808 6,950 412.00 3,808 7,045 412.10 3,808 7,140 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 412.20 3,808 7,235 412.30 3,808 7,330 412.40 3,808 7,426 412.50 3,808 7,521 412.60 3,808 7,616 412.70 3,808 7,711 412.80 3,808 7,806 412.90 3,808 7,902 413.00 3,808 7,997 413.10 3,808 8,092 413.20 3,808 8,187 413.30 3,808 8,282 413.40 3,808 8,378 413.50 3,808 8,473 413.60 3,808 8,568 413.70 3,808 8,663 413.80 3,808 8,758 413.90 3,808 8,854 414.00 3,808 8,949 414.10 3,945 9,336 414.20 4,081 9,738 414.30 4,218 10,153 414.40 4,354 10,581 414.50 4,491 11,024 414.60 4,628 11,479 414.70 4,764 11,949 414.80 4,901 12,432 414.90 5,037 12,929 415.00 5,174 13,440 415.10 5,316 13,964 415.20 5,458 14,503 415.30 5,601 15,056 415.40 5,743 15,623 415.50 5,885 16,205 415.60 6,027 16,800 415.70 6,169 17,410 415.80 6,312 18,034 415.90 6,454 18,672 416.00 6,596 19,325 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Summary for Pond 8P: BIORETENTION 2 [82] Warning: Early inflow requires earlier time span Printed 6/4/2020 Inflow Area = 1.690 ac, 61.54% Impervious, Inflow Depth > 6.77" for 100-YR event Inflow = 19.58 cfs @ 11.96 hrs, Volume= 0.953 of Outflow = 19.34 cfs @ 11.98 hrs, Volume= 0.825 af, Atten= 1 %, Lag= 1.1 min Primary = 19.34 cfs @ 11.98 hrs, Volume= 0.825 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 432.64' @ 11.98 hrs Surf.Area= 2,240 sf Storage= 7,084 cf Plug -Flow detention time= 72.7 min calculated for 0.822 of (86% of inflow) Center -of -Mass det. time= 30.6 min ( 782.8 - 752.2 ) Volume Invert Avail.Storage Storage Description #1 423.91' 10,323 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 423.91 1,587 0.0 0 0 427.91 1,587 40.0 2,539 2,539 430.91 1,587 25.0 1,190 3,729 431.00 1,627 100.0 145 3,874 432.00 2,041 100.0 1,834 5,708 433.00 2,350 100.0 2,196 7,904 434.00 2,489 100.0 2,420 10,323 Device Routing Invert Outlet Devices #1 Primary 424.43' 24.0" Round HDPE_Round 24" L= 61.4' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 424.43' / 423.82' S= 0.0099 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 3.14 sf #2 Device 1 431.91' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=18.63 cfs @ 11.98 hrs HW=432.62' (Free Discharge) t1=HDPE_Round 24" (Passes 18.63 cfs of 40.58 cfs potential flow) L2=Orifice/Grate (Weir Controls 18.63 cfs @ 2.77 fps) 2020-05-20 Energy Balance Prepared by Timmons Group i c 0 A d W Type 1124-hr 100-YR Rainfa&9.16" Pond 8P: BIORETENTION 2 Hydrograph Time (hours) Pond 8P: BIORETENTION 2 Stage -Discharge Discharge (ds) Printed 6/4/2020 ■ h fim— ■ Primary ■ Primary 2020-05-20 Energy Balance Prepared by Timmons Group Type 1124-hr 100-YR Rainfa&9.16" Pond 8P: BIORETENTION 2 Stage -Area -Storage Storage (cubic -feet) Printed 6/4/2020 ■ Surface ■ Storage 2020-05-20 Energy Balance Prepared by Timmons Group Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Pond 8P: BIORETENTION 2 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.04 4 423.92 0.00 5.50 0.06 94 424.06 0.00 6.00 0.08 216 424.25 0.00 6.50 0.10 372 424.50 0.00 7.00 0.12 564 424.80 0.00 7.50 0.14 793 425.16 0.00 8.00 0.16 1,059 425.58 0.00 8.50 0.21 1,382 426.09 0.00 9.00 0.27 1,807 426.76 0.00 9.50 0.30 2,321 427.57 0.00 10.00 0.38 2,920 428.87 0.00 10.50 0.53 3,729 430.91 0.00 11.00 0.77 4,880 431.58 0.00 11.50 1.35 5,766 432.03 1.30 12.00 18.25 7,062 432.63 18.98 12.50 1.60 5,816 432.05 1.71 13.00 0.98 5,729 432.01 1.00 13.50 0.74 5,696 431.99 0.76 14.00 0.58 5,671 431.98 0.59 14.50 0.51 5,652 431.97 0.52 15.00 0.46 5,640 431.97 0.47 15.50 0.41 5,627 431.96 0.41 16.00 0.35 5,614 431.95 0.36 16.50 0.33 5,607 431.95 0.33 17.00 0.31 5,603 431.95 0.31 17.50 0.29 5,598 431.95 0.30 18.00 0.27 5,594 431.94 0.28 18.50 0.26 5,589 431.94 0.26 19.00 0.24 5,584 431.94 0.24 19.50 0.22 5,580 431.94 0.22 20.00 0.20 5,575 431.93 0.20 Printed 6/4/2020 2020-05-20 Energy Balance Prepared by Timmons Group Elevation Primary (feet) (cfs) 423.91 0.00 423.97 0.00 424.03 0.00 424.09 0.00 424.15 0.00 424.21 0.00 424.27 0.00 424.33 0.00 424.39 0.00 424.45 0.00 424.51 0.00 424.57 0.00 424.63 0.00 424.69 0.00 424.75 0.00 424.81 0.00 424.87 0.00 424.93 0.00 424.99 0.00 425.05 0.00 425.11 0.00 425.17 0.00 425.23 0.00 425.29 0.00 425.35 0.00 425.41 0.00 425.47 0.00 425.53 0.00 425.59 0.00 425.65 0.00 425.71 0.00 425.77 0.00 425.83 0.00 425.89 0.00 425.95 0.00 426.01 0.00 426.07 0.00 426.13 0.00 426.19 0.00 426.25 0.00 426.31 0.00 426.37 0.00 426.43 0.00 426.49 0.00 426.55 0.00 426.61 0.00 426.67 0.00 426.73 0.00 426.79 0.00 426.85 0.00 426.91 0.00 426.97 0.00 Type 1124-hr 100-YR Rainfa&9.16" Stage -Discharge for Pond 8P: BIORETENTION 2 Elevation Primary (feet) (cfs) 427.03 0.00 427.09 0.00 427.15 0.00 427.21 0.00 427.27 0.00 427.33 0.00 427.39 0.00 427.45 0.00 427.51 0.00 427.57 0.00 427.63 0.00 427.69 0.00 427.75 0.00 427.81 0.00 427.87 0.00 427.93 0.00 427.99 0.00 428.05 0.00 428.11 0.00 428.17 0.00 428.23 0.00 428.29 0.00 428.35 0.00 428.41 0.00 428.47 0.00 428.53 0.00 428.59 0.00 428.65 0.00 428.71 0.00 428.77 0.00 428.83 0.00 428.89 0.00 428.95 0.00 429.01 0.00 429.07 0.00 429.13 0.00 429.19 0.00 429.25 0.00 429.31 0.00 429.37 0.00 429.43 0.00 429.49 0.00 429.55 0.00 429.61 0.00 429.67 0.00 429.73 0.00 429.79 0.00 429.85 0.00 429.91 0.00 429.97 0.00 430.03 0.00 430.09 0.00 Elevation Primary (feet) (cfs) 430.15 0.00 430.21 0.00 430.27 0.00 430.33 0.00 430.39 0.00 430.45 0.00 430.51 0.00 430.57 0.00 430.63 0.00 430.69 0.00 430.75 0.00 430.81 0.00 430.87 0.00 430.93 0.00 430.99 0.00 431.05 0.00 431.11 0.00 431.17 0.00 431.23 0.00 431.29 0.00 431.35 0.00 431.41 0.00 431.47 0.00 431.53 0.00 431.59 0.00 431.65 0.00 431.71 0.00 431.77 0.00 431.83 0.00 431.89 0.00 431.95 0.25 432.01 0.97 432.07 1.97 432.13 3.18 432.19 4.57 432.25 6.11 432.31 7.80 432.37 9.62 432.43 11.56 432.49 13.61 432.55 15.78 432.61 18.05 432.67 20.42 432.73 22.88 432.79 25.44 432.85 28.09 432.91 30.82 432.97 33.63 433.03 36.02 433.09 36.97 433.15 37.90 433.21 38.81 Printed 6/4/2020 Elevation Primary (feet) (cfs) 433.27 39.69 433.33 40.56 433.39 41.41 433.45 42.24 433.51 43.00 433.57 43.16 433.63 43.32 433.69 43.47 433.75 43.63 433.81 43.79 433.87 43.95 433.93 44.10 433.99 44.26 2020-05-20 Energy Balance Prepared by Timmons Group Type/1 24-hr 100-YR Rainfall=9.16" Stage -Area -Storage for Pond 8P: BIORETENTION 2 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.91 1,587 0 424.06 1,587 95 424.21 1,587 190 424.36 1,587 286 424.51 1,587 381 424.66 1,587 476 424.81 1,587 571 424.96 1,587 667 425.11 1,587 762 425.26 1,587 857 425.41 1,587 952 425.56 1,587 1,047 425.71 1,587 1,143 425.86 1,587 1,238 426.01 1,587 1,333 426.16 1,587 1,428 426.31 1,587 1,524 426.46 1,587 1,619 426.61 1,587 1,714 426.76 1,587 1,809 426.91 1,587 1,904 427.06 1,587 2,000 427.21 1,587 2,095 427.36 1,587 2,190 427.51 1,587 2,285 427.66 1,587 2,381 427.81 1,587 2,476 427.96 1,587 2,559 428.11 1,587 2,619 428.26 1,587 2,678 428.41 1,587 2,738 428.56 1,587 2,797 428.71 1,587 2,857 428.86 1,587 2,916 429.01 1,587 2,976 429.16 1,587 3,035 429.31 1,587 3,095 429.46 1,587 3,154 429.61 1,587 3,214 429.76 1,587 3,273 429.91 1,587 3,333 430.06 1,587 3,392 430.21 1,587 3,452 430.36 1,587 3,511 430.51 1,587 3,571 430.66 1,587 3,630 430.81 1,587 3,690 430.96 1,609 3,809 431.11 1,673 4,056 431.26 1,735 4,311 431.41 1,797 4,576 431.56 1,859 4,850 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 431.71 1,921 5,134 431.86 1,983 5,426 432.01 2,044 5,729 432.16 2,090 6,039 432.31 2,137 6,356 432.46 2,183 6,680 432.61 2,229 7,011 432.76 2,276 7,348 432.91 2,322 7,693 433.06 2,358 8,045 433.21 2,379 8,400 433.36 2,400 8,759 433.51 2,421 9,120 433.66 2,442 9,485 433.81 2,463 9,853 433.96 2,483 10,224 Printed 6/4/2020 11S 9S Onsile .routed 4 5S To Dry Po 10 Offsite T Bior DRY P NO etenlion 1 4S 7S Onsi To Bioretention 1 1 S PRE site To Bioro ntion 2 2S v 6P / 8P /Pre Onsite BIORETENTION 1 CCCSSS BIORETENTION 2 13L 3L POST Combine PRE Combined 12S Onsite Unrouted 5 Subcat Reach Aon Llnk 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Subcatchment 1S: PRE Onsite Runoff = 7.33 cfs @ 12.00 hrs, Volume= 0.398 af, Depth> 0.33" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 0.210 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 14.350 60 Woods, Fair, HSG B 14.560 61 Weighted Average 14.350 98.56% Pervious Area 0.210 1.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: PRE Onsite Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 1S: PRE Onsite Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.67 0.00 0.00 11.00 0.72 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.00 0.00 12.00 2.02 0.08 7.33 12.25 2.15 0.11 1.63 12.50 2.24 0.13 1.15 12.75 2.30 0.14 0.89 13.00 2.35 0.15 0.78 13.25 2.40 0.17 0.69 13.50 2.44 0.18 0.62 13.75 2.47 0.19 0.56 14.00 2.50 0.20 0.51 14.25 2.53 0.20 0.48 14.50 2.55 0.21 0.46 14.75 2.58 0.22 0.45 15.00 2.60 0.23 0.43 15.25 2.63 0.23 0.41 15.50 2.65 0.24 0.39 15.75 2.67 0.25 0.37 16.00 2.68 0.25 0.35 16.25 2.70 0.26 0.33 16.50 2.72 0.26 0.33 16.75 2.73 0.27 0.32 17.00 2.75 0.28 0.31 17.25 2.77 0.28 0.31 17.50 2.78 0.29 0.30 17.75 2.80 0.29 0.29 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 0.30 0.28 18.25 2.82 0.30 0.28 18.50 2.84 0.30 0.27 18.75 2.85 0.31 0.26 19.00 2.86 0.31 0.25 19.25 2.87 0.32 0.24 19.50 2.88 0.32 0.23 19.75 2.89 0.33 0.22 20.00 2.90 0.33 0.22 Printed 3/11/2021 2021-03-11 Full Routing Type 1124-hr 1-YR Rainfall=3.05" Prepared by Timmons Group Printed 3/11/2021 Summary for Subcatchment 2S: Pre Offsite Runoff = 2.30 cfs @ 11.98 hrs, Volume= 0.101 af, Depth> 0.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 0.510 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 1.010 60 Woods, Fair, HSG B 1.520 73 Weighted Average 1.010 66.45% Pervious Area 0.510 33.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Pre Offsite Hydrograph ■ Rurwff Type II 24-hr 1-YR Rainfall=3.05r� Runoff Area=1.520 ac Runoff Volume=0.101 of Runoff Depth>0.80" i.0 min CN=j73 12 13 14 15 16 17 18 19 20 Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 2S: Pre Mite Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.67 0.00 0.00 11.00 0.72 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.02 11.75 1.18 0.05 0.32 12.00 2.02 0.33 2.25 12.25 2.15 0.39 0.37 12.50 2.24 0.43 0.25 12.75 2.30 0.46 0.18 13.00 2.35 0.49 0.16 13.25 2.40 0.51 0.14 13.50 2.44 0.53 0.12 13.75 2.47 0.55 0.11 14.00 2.50 0.57 0.10 14.25 2.53 0.58 0.09 14.50 2.55 0.60 0.09 14.75 2.58 0.61 0.08 15.00 2.60 0.62 0.08 15.25 2.63 0.64 0.08 15.50 2.65 0.65 0.07 15.75 2.67 0.66 0.07 16.00 2.68 0.67 0.06 16.25 2.70 0.68 0.06 16.50 2.72 0.69 0.06 16.75 2.73 0.70 0.06 17.00 2.75 0.71 0.06 17.25 2.77 0.72 0.05 17.50 2.78 0.73 0.05 17.75 2.80 0.73 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 0.74 0.05 18.25 2.82 0.75 0.05 18.50 2.84 0.76 0.05 18.75 2.85 0.77 0.05 19.00 2.86 0.77 0.04 19.25 2.87 0.78 0.04 19.50 2.88 0.79 0.04 19.75 2.89 0.79 0.04 20.00 2.90 0.80 0.04 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Printed 3/11/2021 Summary for Subcatchment 4S: Onsite To Bioretention 1 Runoff = 11.09 cfs @ 11.97 hrs, Volume= 0.493 af, Depth> 1.37" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN Description 2.640 98 Paved parking, HSG B 1.430 61 >75% Grass cover, Good, HSG B 0.260 60 Woods, Fair, HSG B 4.330 83 Weighted Average 1.690 39.03% Pervious Area 2.640 60.97% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 3 LL Subcatchment 4S: Onsite To Bioretention 1 Hydrograph Now MMM MMMMMMM It / tl V lu 11 11 13 14 15 lb I 18 19 zu Time (hours) ■ Rurwff 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 4S: Onsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.01 9.25 0.47 0.00 0.02 9.50 0.50 0.00 0.03 9.75 0.52 0.01 0.04 10.00 0.55 0.01 0.06 10.25 0.58 0.01 0.08 10.50 0.62 0.02 0.11 10.75 0.67 0.03 0.15 11.00 0.72 0.04 0.21 11.25 0.78 0.06 0.31 11.50 0.86 0.08 0.46 11.75 1.18 0.21 2.70 12.00 2.02 0.71 10.66 12.25 2.15 0.80 1.57 12.50 2.24 0.87 1.03 12.75 2.30 0.91 0.76 13.00 2.35 0.95 0.64 13.25 2.40 0.98 0.56 13.50 2.44 1.01 0.49 13.75 2.47 1.03 0.44 14.00 2.50 1.06 0.39 14.25 2.53 1.08 0.36 14.50 2.55 1.10 0.35 14.75 2.58 1.12 0.33 15.00 2.60 1.13 0.31 15.25 2.63 1.15 0.30 15.50 2.65 1.17 0.28 15.75 2.67 1.18 0.26 16.00 2.68 1.20 0.24 16.25 2.70 1.21 0.23 16.50 2.72 1.22 0.23 16.75 2.73 1.24 0.22 17.00 2.75 1.25 0.22 17.25 2.77 1.26 0.21 17.50 2.78 1.27 0.20 17.75 2.80 1.28 0.20 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 1.29 0.19 18.25 2.82 1.31 0.18 18.50 2.84 1.32 0.18 18.75 2.85 1.33 0.17 19.00 2.86 1.33 0.17 19.25 2.87 1.34 0.16 19.50 2.88 1.35 0.15 19.75 2.89 1.36 0.15 20.00 2.90 1.37 0.14 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Subcatchment 5S: Mite To Bioretention 1 Runoff = 2.30 cfs @ 11.98 hrs, Volume= 0.101 af, Depth> 0.80" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 0.510 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 1.010 60 Woods, Fair, HSG B 1.520 73 Weighted Average 1.010 66.45% Pervious Area 0.510 33.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Mite To Bioretention 1 Hydrograph ■ Rurwff Type II 24-hr 1-YR Rainfall=3.05r� Runoff Area=1.520 ac Runoff Volume=0.101 of Runoff Depth>0.80" i.0 min CN=j73 12 13 14 15 16 17 18 19 20 Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 5S: Offsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.67 0.00 0.00 11.00 0.72 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.02 11.75 1.18 0.05 0.32 12.00 2.02 0.33 2.25 12.25 2.15 0.39 0.37 12.50 2.24 0.43 0.25 12.75 2.30 0.46 0.18 13.00 2.35 0.49 0.16 13.25 2.40 0.51 0.14 13.50 2.44 0.53 0.12 13.75 2.47 0.55 0.11 14.00 2.50 0.57 0.10 14.25 2.53 0.58 0.09 14.50 2.55 0.60 0.09 14.75 2.58 0.61 0.08 15.00 2.60 0.62 0.08 15.25 2.63 0.64 0.08 15.50 2.65 0.65 0.07 15.75 2.67 0.66 0.07 16.00 2.68 0.67 0.06 16.25 2.70 0.68 0.06 16.50 2.72 0.69 0.06 16.75 2.73 0.70 0.06 17.00 2.75 0.71 0.06 17.25 2.77 0.72 0.05 17.50 2.78 0.73 0.05 17.75 2.80 0.73 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 0.74 0.05 18.25 2.82 0.75 0.05 18.50 2.84 0.76 0.05 18.75 2.85 0.77 0.05 19.00 2.86 0.77 0.04 19.25 2.87 0.78 0.04 19.50 2.88 0.79 0.04 19.75 2.89 0.79 0.04 20.00 2.90 0.80 0.04 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Subcatchment 7S: To Bioretention 2 Runoff = 4.48 cfs @ 11.97 hrs, Volume= 0.198 af, Depth> 1.24" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 1.040 98 Paved parking, HSG B 0.840 61 >75% Grass cover, Good, HSG B 0.040 60 Woods, Fair, HSG B 1.920 81 Weighted Average 0.880 45.83% Pervious Area 1.040 54.17% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: To Bioretention 2 Hydrograph ■ Runoff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 7S: To Bioretention 2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.01 10.00 0.55 0.00 0.01 10.25 0.58 0.01 0.02 10.50 0.62 0.01 0.03 10.75 0.67 0.02 0.05 11.00 0.72 0.02 0.07 11.25 0.78 0.04 0.11 11.50 0.86 0.06 0.16 11.75 1.18 0.17 1.01 12.00 2.02 0.62 4.33 12.25 2.15 0.70 0.65 12.50 2.24 0.76 0.43 12.75 2.30 0.80 0.32 13.00 2.35 0.84 0.27 13.25 2.40 0.87 0.23 13.50 2.44 0.90 0.21 13.75 2.47 0.92 0.18 14.00 2.50 0.94 0.16 14.25 2.53 0.96 0.15 14.50 2.55 0.98 0.14 14.75 2.58 1.00 0.14 15.00 2.60 1.02 0.13 15.25 2.63 1.03 0.12 15.50 2.65 1.05 0.12 15.75 2.67 1.06 0.11 16.00 2.68 1.08 0.10 16.25 2.70 1.09 0.10 16.50 2.72 1.10 0.10 16.75 2.73 1.11 0.09 17.00 2.75 1.12 0.09 17.25 2.77 1.14 0.09 17.50 2.78 1.15 0.09 17.75 2.80 1.16 0.08 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 1.17 0.08 18.25 2.82 1.18 0.08 18.50 2.84 1.19 0.08 18.75 2.85 1.20 0.07 19.00 2.86 1.21 0.07 19.25 2.87 1.22 0.07 19.50 2.88 1.22 0.06 19.75 2.89 1.23 0.06 20.00 2.90 1.24 0.06 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Subcatchment 9S: To Dry Pond Runoff = 17.96 cfs @ 11.97 hrs, Volume= 0.799 af, Depth> 1.37" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 4.240 98 Paved parking, HSG B 2.770 61 >75% Grass cover, Good, HSG B 0.000 60 Woods, Fair, HSG B 7.010 83 Weighted Average 2.770 39.51 % Pervious Area 4.240 60.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 9S: To Dry Pond Hydrograph FA _M M_MMMMM _____ _MMM M_MMMMM ___MW''�'IMM ____ ® ___K"UMZ&iUM ______ �_�_�_�_�_�_■ �L►1:LJ111JC11'WJb�L�JC.I■ /______� Time (hours) ■ Runoff 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 9S: To Dry Pond Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.02 9.25 0.47 0.00 0.04 9.50 0.50 0.00 0.05 9.75 0.52 0.01 0.07 10.00 0.55 0.01 0.10 10.25 0.58 0.01 0.13 10.50 0.62 0.02 0.18 10.75 0.67 0.03 0.25 11.00 0.72 0.04 0.34 11.25 0.78 0.06 0.50 11.50 0.86 0.08 0.75 11.75 1.18 0.21 4.37 12.00 2.02 0.71 17.26 12.25 2.15 0.80 2.55 12.50 2.24 0.87 1.67 12.75 2.30 0.91 1.24 13.00 2.35 0.95 1.04 13.25 2.40 0.98 0.90 13.50 2.44 1.01 0.80 13.75 2.47 1.03 0.71 14.00 2.50 1.06 0.63 14.25 2.53 1.08 0.59 14.50 2.55 1.10 0.56 14.75 2.58 1.12 0.53 15.00 2.60 1.13 0.51 15.25 2.63 1.15 0.48 15.50 2.65 1.17 0.45 15.75 2.67 1.18 0.42 16.00 2.68 1.20 0.40 16.25 2.70 1.21 0.38 16.50 2.72 1.22 0.37 16.75 2.73 1.24 0.36 17.00 2.75 1.25 0.35 17.25 2.77 1.26 0.34 17.50 2.78 1.27 0.33 17.75 2.80 1.28 0.32 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 1.29 0.31 18.25 2.82 1.31 0.30 18.50 2.84 1.32 0.29 18.75 2.85 1.33 0.28 19.00 2.86 1.33 0.27 19.25 2.87 1.34 0.26 19.50 2.88 1.35 0.25 19.75 2.89 1.36 0.24 20.00 2.90 1.37 0.23 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Subcatchment 11S: Onsite Unrouted 4 Runoff = 0.61 cfs @ 11.99 hrs, Volume= 0.028 af, Depth> 0.54" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 0.110 98 Paved parking, HSG B 0.380 61 >75% Grass cover, Good, HSG B 0.140 60 Woods, Fair, HSG B 0.630 67 Weighted Average 0.520 82.54% Pervious Area 0.110 17.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: Onsite Unrouted 4 Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 11S: Onsite Unrouted 4 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.00 0.00 10.75 0.67 0.00 0.00 11.00 0.72 0.00 0.00 11.25 0.78 0.00 0.00 11.50 0.86 0.00 0.00 11.75 1.18 0.01 0.02 12.00 2.02 0.18 0.61 12.25 2.15 0.22 0.11 12.50 2.24 0.26 0.08 12.75 2.30 0.28 0.06 13.00 2.35 0.30 0.05 13.25 2.40 0.32 0.04 13.50 2.44 0.33 0.04 13.75 2.47 0.34 0.03 14.00 2.50 0.36 0.03 14.25 2.53 0.37 0.03 14.50 2.55 0.38 0.03 14.75 2.58 0.39 0.03 15.00 2.60 0.40 0.03 15.25 2.63 0.41 0.02 15.50 2.65 0.42 0.02 15.75 2.67 0.43 0.02 16.00 2.68 0.44 0.02 16.25 2.70 0.44 0.02 16.50 2.72 0.45 0.02 16.75 2.73 0.46 0.02 17.00 2.75 0.47 0.02 17.25 2.77 0.47 0.02 17.50 2.78 0.48 0.02 17.75 2.80 0.49 0.02 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 0.49 0.02 18.25 2.82 0.50 0.02 18.50 2.84 0.51 0.02 18.75 2.85 0.51 0.01 19.00 2.86 0.52 0.01 19.25 2.87 0.52 0.01 19.50 2.88 0.53 0.01 19.75 2.89 0.53 0.01 20.00 2.90 0.54 0.01 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Subcatchment 12S: Onsite Unrouted 5 Runoff = 1.98 cfs @ 11.97 hrs, Volume= 0.088 af, Depth> 1.30" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-YR Rainfall=3.05 Area (ac) CN 0.460 98 Paved parking, HSG B 0.310 61 >75% Grass cover, Good, HSG B 0.040 60 Woods, Fair, HSG B 0.810 82 Weighted Average 0.350 43.21 % Pervious Area 0.460 56.79% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 12S: Onsite Unrouted 5 Hydrograph ❑ RunoH Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Subcatchment 12S: Onsite Unrouted 5 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.37 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.01 10.00 0.55 0.01 0.01 10.25 0.58 0.01 0.01 10.50 0.62 0.01 0.02 10.75 0.67 0.02 0.02 11.00 0.72 0.03 0.03 11.25 0.78 0.05 0.05 11.50 0.86 0.07 0.08 11.75 1.18 0.19 0.47 12.00 2.02 0.66 1.91 12.25 2.15 0.75 0.28 12.50 2.24 0.81 0.19 12.75 2.30 0.86 0.14 13.00 2.35 0.89 0.12 13.25 2.40 0.92 0.10 13.50 2.44 0.95 0.09 13.75 2.47 0.98 0.08 14.00 2.50 1.00 0.07 14.25 2.53 1.02 0.07 14.50 2.55 1.04 0.06 14.75 2.58 1.06 0.06 15.00 2.60 1.07 0.06 15.25 2.63 1.09 0.05 15.50 2.65 1.11 0.05 15.75 2.67 1.12 0.05 16.00 2.68 1.14 0.04 16.25 2.70 1.15 0.04 16.50 2.72 1.16 0.04 16.75 2.73 1.17 0.04 17.00 2.75 1.19 0.04 17.25 2.77 1.20 0.04 17.50 2.78 1.21 0.04 17.75 2.80 1.22 0.04 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 2.81 1.23 0.03 18.25 2.82 1.24 0.03 18.50 2.84 1.25 0.03 18.75 2.85 1.26 0.03 19.00 2.86 1.27 0.03 19.25 2.87 1.28 0.03 19.50 2.88 1.29 0.03 19.75 2.89 1.30 0.03 20.00 2.90 1.30 0.03 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Pond 6P: BIORETENTION 1 Printed 3/11/2021 Inflow Area = 5.850 ac, 53.85% Impervious, Inflow Depth > 1.22" for 1-YR event Inflow = 13.48 cfs @ 11.98 hrs, Volume= 0.594 of Outflow = 1.71 cfs @ 12.34 hrs, Volume= 0.284 af, Atten= 87%, Lag= 22.0 min Primary = 1.71 cfs @ 12.34 hrs, Volume= 0.284 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 415.10' @ 12.34 hrs Surf.Area= 5,317 sf Storage= 13,966 cf Plug -Flow detention time= 178.1 min calculated for 0.284 of (48% of inflow) Center -of -Mass det. time= 93.9 min ( 887.2 - 793.3 ) Volume Invert Avail.Storage Storage Description #1 407.00' 30,851 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 407.00 3,808 0.0 0 0 411.00 3,808 40.0 6,093 6,093 414.00 3,808 25.0 2,856 8,949 415.00 5,174 100.0 4,491 13,440 416.00 6,596 100.0 5,885 19,325 417.50 8,772 100.0 11,526 30,851 Device Routing Invert Outlet Devices #1 Primary 409.71' 36.0" Round HDPE_Round 36" L= 47.6' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 409.71' / 409.00' S= 0.0149 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 7.07 sf #2 Device 1 415.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 415.85' 15.0' long x 1.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 Primary OutFlow Max=1.62 cfs @ 12.34 hrs HW=415.10' (Free Discharge) 11=HDPE Round 36" (Passes 1.62 cfs of 67.13 cfs potential flow) t2=Orifice/Grate (Weir Controls 1.62 cfs @ 1.03 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 2021-03-11 Full Routing Prepared by Timmons Grc i c 0 A d W Pond 6P: BIORETENTION 1 Hydrograph Time (hours) Pond 6P: BIORETENTION 1 Stage -Discharge Discharge (ds) Type ll 24-hr 1-YR Rainfall=3.05" Printed 3/11/2021 ■ Inflow ■ Primary ❑ Primary 2021-03-11 Full Routing Prepared by Timmons Grc Pond 6P: BIORETENTION 1 Stage -Area -Storage Storage (cubic -feet) Type ll 24-hr 1-YR Rainfall=3.05" Printed 3/11/2021 ■ Surface ■ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Pond 6P: BIORETENTION 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 407.00 0.00 5.50 0.00 0 407.00 0.00 6.00 0.00 0 407.00 0.00 6.50 0.00 0 407.00 0.00 7.00 0.00 0 407.00 0.00 7.50 0.00 0 407.00 0.00 8.00 0.00 0 407.00 0.00 8.50 0.00 0 407.00 0.00 9.00 0.01 7 407.00 0.00 9.50 0.03 46 407.03 0.00 10.00 0.06 125 407.08 0.00 10.50 0.11 275 407.18 0.00 11.00 0.21 557 407.37 0.00 11.50 0.49 1,143 407.75 0.00 12.00 12.91 9,654 414.18 0.00 12.50 1.28 13,911 415.09 1.41 13.00 0.80 13,741 415.06 0.86 13.50 0.61 13,666 415.04 0.65 14.00 0.49 13,619 415.03 0.51 14.50 0.43 13,594 415.03 0.44 15.00 0.39 13,580 415.03 0.40 15.50 0.35 13,565 415.02 0.36 16.00 0.31 13,550 415.02 0.32 16.50 0.29 13,541 415.02 0.29 17.00 0.27 13,536 415.02 0.27 17.50 0.26 13,531 415.02 0.26 18.00 0.24 13,525 415.02 0.24 18.50 0.23 13,520 415.02 0.23 19.00 0.21 13,514 415.01 0.21 19.50 0.19 13,509 415.01 0.20 20.00 0.18 13,503 415.01 0.18 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 407.00 0.00 407.06 0.00 407.12 0.00 407.18 0.00 407.24 0.00 407.30 0.00 407.36 0.00 407.42 0.00 407.48 0.00 407.54 0.00 407.60 0.00 407.66 0.00 407.72 0.00 407.78 0.00 407.84 0.00 407.90 0.00 407.96 0.00 408.02 0.00 408.08 0.00 408.14 0.00 408.20 0.00 408.26 0.00 408.32 0.00 408.38 0.00 408.44 0.00 408.50 0.00 408.56 0.00 408.62 0.00 408.68 0.00 408.74 0.00 408.80 0.00 408.86 0.00 408.92 0.00 408.98 0.00 409.04 0.00 409.10 0.00 409.16 0.00 409.22 0.00 409.28 0.00 409.34 0.00 409.40 0.00 409.46 0.00 409.52 0.00 409.58 0.00 409.64 0.00 409.70 0.00 409.76 0.00 409.82 0.00 409.88 0.00 409.94 0.00 410.00 0.00 410.06 0.00 Type 1124-hr 1-YR Rainfall=3.05" Stage -Discharge for Pond 6P: BIORETENTION 1 Elevation Primary (feet) (cfs) 410.12 0.00 410.18 0.00 410.24 0.00 410.30 0.00 410.36 0.00 410.42 0.00 410.48 0.00 410.54 0.00 410.60 0.00 410.66 0.00 410.72 0.00 410.78 0.00 410.84 0.00 410.90 0.00 410.96 0.00 411.02 0.00 411.08 0.00 411.14 0.00 411.20 0.00 411.26 0.00 411.32 0.00 411.38 0.00 411.44 0.00 411.50 0.00 411.56 0.00 411.62 0.00 411.68 0.00 411.74 0.00 411.80 0.00 411.86 0.00 411.92 0.00 411.98 0.00 412.04 0.00 412.10 0.00 412.16 0.00 412.22 0.00 412.28 0.00 412.34 0.00 412.40 0.00 412.46 0.00 412.52 0.00 412.58 0.00 412.64 0.00 412.70 0.00 412.76 0.00 412.82 0.00 412.88 0.00 412.94 0.00 413.00 0.00 413.06 0.00 413.12 0.00 413.18 0.00 Elevation Primary (feet) (cfs) 413.24 0.00 413.30 0.00 413.36 0.00 413.42 0.00 413.48 0.00 413.54 0.00 413.60 0.00 413.66 0.00 413.72 0.00 413.78 0.00 413.84 0.00 413.90 0.00 413.96 0.00 414.02 0.00 414.08 0.00 414.14 0.00 414.20 0.00 414.26 0.00 414.32 0.00 414.38 0.00 414.44 0.00 414.50 0.00 414.56 0.00 414.62 0.00 414.68 0.00 414.74 0.00 414.80 0.00 414.86 0.00 414.92 0.00 414.98 0.00 415.04 0.41 415.10 1.62 415.16 3.29 415.22 5.30 415.28 7.61 415.34 10.18 415.40 12.99 415.46 16.03 415.52 19.26 415.58 22.69 415.64 26.30 415.70 30.08 415.76 34.03 415.82 38.14 415.88 42.61 415.94 47.90 416.00 53.71 416.06 59.94 416.12 66.57 416.18 73.54 416.24 80.86 416.30 88.48 Printed 3/11/2021 Elevation Primary (feet) (cfs) 416.36 92.19 416.42 95.41 416.48 98.87 416.54 102.61 416.60 106.54 416.66 110.69 416.72 115.14 416.78 119.80 416.84 124.69 416.90 129.68 416.96 134.85 417.02 140.22 417.08 145.85 417.14 151.76 417.20 157.88 417.26 164.18 417.32 170.43 417.38 176.86 417.44 183.47 417.50 189.88 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Stage -Area -Storage for Pond 6P: BIORETENTION 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 407.00 3,808 0 407.15 3,808 228 407.30 3,808 457 407.45 3,808 685 407.60 3,808 914 407.75 3,808 1,142 407.90 3,808 1,371 408.05 3,808 1,599 408.20 3,808 1,828 408.35 3,808 2,056 408.50 3,808 2,285 408.65 3,808 2,513 408.80 3,808 2,742 408.95 3,808 2,970 409.10 3,808 3,199 409.25 3,808 3,427 409.40 3,808 3,656 409.55 3,808 3,884 409.70 3,808 4,113 409.85 3,808 4,341 410.00 3,808 4,570 410.15 3,808 4,798 410.30 3,808 5,027 410.45 3,808 5,255 410.60 3,808 5,484 410.75 3,808 5,712 410.90 3,808 5,940 411.05 3,808 6,140 411.20 3,808 6,283 411.35 3,808 6,426 411.50 3,808 6,569 411.65 3,808 6,712 411.80 3,808 6,854 411.95 3,808 6,997 412.10 3,808 7,140 412.25 3,808 7,283 412.40 3,808 7,426 412.55 3,808 7,568 412.70 3,808 7,711 412.85 3,808 7,854 413.00 3,808 7,997 413.15 3,808 8,140 413.30 3,808 8,282 413.45 3,808 8,425 413.60 3,808 8,568 413.75 3,808 8,711 413.90 3,808 8,854 414.05 3,876 9,141 414.20 4,081 9,738 414.35 4,286 10,365 414.50 4,491 11,024 414.65 4,696 11,713 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 414.80 4,901 12,432 414.95 5,106 13,183 415.10 5,316 13,964 415.25 5,530 14,778 415.40 5,743 15,623 415.55 5,956 16,501 415.70 6,169 17,410 415.85 6,383 18,351 416.00 6,596 19,325 416.15 6,814 20,331 416.30 7,031 21,369 416.45 7,249 22,440 416.60 7,466 23,544 416.75 7,684 24,680 416.90 7,902 25,849 417.05 8,119 27,050 417.20 8,337 28,284 417.35 8,554 29,551 417.50 8,772 30,851 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Pond 8P: BIORETENTION 2 Printed 3/11/2021 Inflow Area = 1.920 ac, 54.17% Impervious, Inflow Depth > 1.24" for 1-YR event Inflow = 4.48 cfs @ 11.97 hrs, Volume= 0.198 of Outflow = 0.27 cfs @ 12.99 hrs, Volume= 0.071 af, Atten= 94%, Lag= 60.8 min Primary = 0.27 cfs @ 12.99 hrs, Volume= 0.071 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 431.94' @ 12.99 hrs Surf.Area= 2,017 sf Storage= 5,592 cf Plug -Flow detention time= 226.5 min calculated for 0.071 of (36% of inflow) Center -of -Mass det. time= 138.8 min ( 933.0 - 794.2 ) Volume Invert Avail.Storage Storage Description #1 423.91' 10,323 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 423.91 1,587 0.0 0 0 427.91 1,587 40.0 2,539 2,539 430.91 1,587 25.0 1,190 3,729 431.00 1,627 100.0 145 3,874 432.00 2,041 100.0 1,834 5,708 433.00 2,350 100.0 2,196 7,904 434.00 2,489 100.0 2,420 10,323 Device Routino Invert Outlet Devices #1 Primary 424.43' 18.0" Round HDPE_Round 18" L= 61.4' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 424.43' / 423.82' S= 0.0099 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 1.77 sf #2 Device 1 431.91' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.18 cfs @ 12.99 hrs HW=431.94' (Free Discharge) L1=HDPE_Round 18" (Passes 0.18 cfs of 22.13 cfs potential flow) t2=Orifice/Grate (Weir Controls 0.18 cfs @ 0.59 fps) 2021-03-11 Full Routing Prepared by Timmons Grc i c m m W Type ll 24-hr 1-YR Rainfall=3.05" Printed 3/11/2021 Pond 8P: BIORETENTION 2 Hydrograph I I I I Time (hours) Pond 8P: BIORETENTION 2 Stage -Discharge 434 Orifice/Grate - - 432 431 430- 429- .. ...... 428 ,_ ........_.. 427 426 425 HD 424 0 2 4 6 6 10 12 14 16 16 20 22 24 Discharge (ds) ■ h fim— ■ Primary ■ Primary 2021-03-11 Full Routing Prepared by Timmons Grc Pond 8P: BIORETENTION 2 Stage -Area -Storage Storage (cubic -feet) Type ll 24-hr 1-YR Rainfall=3.05" Printed 3/11/2021 ■ Surface ■ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Pond 8P: BIORETENTION 2 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 423.91 0.00 5.50 0.00 0 423.91 0.00 6.00 0.00 0 423.91 0.00 6.50 0.00 0 423.91 0.00 7.00 0.00 0 423.91 0.00 7.50 0.00 0 423.91 0.00 8.00 0.00 0 423.91 0.00 8.50 0.00 0 423.91 0.00 9.00 0.00 0 423.91 0.00 9.50 0.00 1 423.91 0.00 10.00 0.01 15 423.93 0.00 10.50 0.03 54 424.00 0.00 11.00 0.07 141 424.13 0.00 11.50 0.16 337 424.44 0.00 12.00 4.33 3,195 429.56 0.00 12.50 0.43 5,184 431.74 0.00 13.00 0.27 5,592 431.94 0.27 13.50 0.21 5,578 431.94 0.21 14.00 0.16 5,567 431.93 0.17 14.50 0.14 5,562 431.93 0.15 15.00 0.13 5,559 431.93 0.13 15.50 0.12 5,555 431.92 0.12 16.00 0.10 5,552 431.92 0.10 16.50 0.10 5,550 431.92 0.10 17.00 0.09 5,548 431.92 0.09 17.50 0.09 5,547 431.92 0.09 18.00 0.08 5,546 431.92 0.08 18.50 0.08 5,545 431.92 0.08 19.00 0.07 5,543 431.92 0.07 19.50 0.06 5,542 431.92 0.07 20.00 0.06 5,541 431.92 0.06 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 423.91 0.00 423.97 0.00 424.03 0.00 424.09 0.00 424.15 0.00 424.21 0.00 424.27 0.00 424.33 0.00 424.39 0.00 424.45 0.00 424.51 0.00 424.57 0.00 424.63 0.00 424.69 0.00 424.75 0.00 424.81 0.00 424.87 0.00 424.93 0.00 424.99 0.00 425.05 0.00 425.11 0.00 425.17 0.00 425.23 0.00 425.29 0.00 425.35 0.00 425.41 0.00 425.47 0.00 425.53 0.00 425.59 0.00 425.65 0.00 425.71 0.00 425.77 0.00 425.83 0.00 425.89 0.00 425.95 0.00 426.01 0.00 426.07 0.00 426.13 0.00 426.19 0.00 426.25 0.00 426.31 0.00 426.37 0.00 426.43 0.00 426.49 0.00 426.55 0.00 426.61 0.00 426.67 0.00 426.73 0.00 426.79 0.00 426.85 0.00 426.91 0.00 426.97 0.00 Type ll 24-hr 1-YR Rainfall=3.05" Stage -Discharge for Pond 8P: BIORETENTION 2 Elevation Primary (feet) (cfs) 427.03 0.00 427.09 0.00 427.15 0.00 427.21 0.00 427.27 0.00 427.33 0.00 427.39 0.00 427.45 0.00 427.51 0.00 427.57 0.00 427.63 0.00 427.69 0.00 427.75 0.00 427.81 0.00 427.87 0.00 427.93 0.00 427.99 0.00 428.05 0.00 428.11 0.00 428.17 0.00 428.23 0.00 428.29 0.00 428.35 0.00 428.41 0.00 428.47 0.00 428.53 0.00 428.59 0.00 428.65 0.00 428.71 0.00 428.77 0.00 428.83 0.00 428.89 0.00 428.95 0.00 429.01 0.00 429.07 0.00 429.13 0.00 429.19 0.00 429.25 0.00 429.31 0.00 429.37 0.00 429.43 0.00 429.49 0.00 429.55 0.00 429.61 0.00 429.67 0.00 429.73 0.00 429.79 0.00 429.85 0.00 429.91 0.00 429.97 0.00 430.03 0.00 430.09 0.00 Elevation Primary (feet) (cfs) 430.15 0.00 430.21 0.00 430.27 0.00 430.33 0.00 430.39 0.00 430.45 0.00 430.51 0.00 430.57 0.00 430.63 0.00 430.69 0.00 430.75 0.00 430.81 0.00 430.87 0.00 430.93 0.00 430.99 0.00 431.05 0.00 431.11 0.00 431.17 0.00 431.23 0.00 431.29 0.00 431.35 0.00 431.41 0.00 431.47 0.00 431.53 0.00 431.59 0.00 431.65 0.00 431.71 0.00 431.77 0.00 431.83 0.00 431.89 0.00 431.95 0.25 432.01 0.97 432.07 1.97 432.13 3.18 432.19 4.57 432.25 6.11 432.31 7.80 432.37 9.62 432.43 11.56 432.49 13.61 432.55 15.78 432.61 18.05 432.67 20.42 432.73 22.88 432.79 23.47 432.85 23.56 432.91 23.66 432.97 23.75 433.03 23.84 433.09 23.93 433.15 24.02 433.21 24.11 Printed 3/11/2021 Elevation Primary (feet) (cfs) 433.27 24.20 433.33 24.29 433.39 24.38 433.45 24.47 433.51 24.56 433.57 24.65 433.63 24.73 433.69 24.82 433.75 24.91 433.81 25.00 433.87 25.08 433.93 25.17 433.99 25.26 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Stage -Area -Storage for Pond 8P: BIORETENTION 2 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.91 1,587 0 424.06 1,587 95 424.21 1,587 190 424.36 1,587 286 424.51 1,587 381 424.66 1,587 476 424.81 1,587 571 424.96 1,587 667 425.11 1,587 762 425.26 1,587 857 425.41 1,587 952 425.56 1,587 1,047 425.71 1,587 1,143 425.86 1,587 1,238 426.01 1,587 1,333 426.16 1,587 1,428 426.31 1,587 1,524 426.46 1,587 1,619 426.61 1,587 1,714 426.76 1,587 1,809 426.91 1,587 1,904 427.06 1,587 2,000 427.21 1,587 2,095 427.36 1,587 2,190 427.51 1,587 2,285 427.66 1,587 2,381 427.81 1,587 2,476 427.96 1,587 2,559 428.11 1,587 2,619 428.26 1,587 2,678 428.41 1,587 2,738 428.56 1,587 2,797 428.71 1,587 2,857 428.86 1,587 2,916 429.01 1,587 2,976 429.16 1,587 3,035 429.31 1,587 3,095 429.46 1,587 3,154 429.61 1,587 3,214 429.76 1,587 3,273 429.91 1,587 3,333 430.06 1,587 3,392 430.21 1,587 3,452 430.36 1,587 3,511 430.51 1,587 3,571 430.66 1,587 3,630 430.81 1,587 3,690 430.96 1,609 3,809 431.11 1,673 4,056 431.26 1,735 4,311 431.41 1,797 4,576 431.56 1,859 4,850 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 431.71 1,921 5,134 431.86 1,983 5,426 432.01 2,044 5,729 432.16 2,090 6,039 432.31 2,137 6,356 432.46 2,183 6,680 432.61 2,229 7,011 432.76 2,276 7,348 432.91 2,322 7,693 433.06 2,358 8,045 433.21 2,379 8,400 433.36 2,400 8,759 433.51 2,421 9,120 433.66 2,442 9,485 433.81 2,463 9,853 433.96 2,483 10,224 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Summary for Pond 10P: DRY POND Printed 3/11/2021 Inflow Area = 7.010 ac, 60.49% Impervious, Inflow Depth > 1.37" for 1-YR event Inflow = 17.96 cfs @ 11.97 hrs, Volume= 0.799 of Outflow = 1.34 cfs @ 12.63 hrs, Volume= 0.752 af, Atten= 93%, Lag= 39.7 min Primary = 1.34 cfs @ 12.63 hrs, Volume= 0.752 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 423.91' @ 12.63 hrs Surf.Area= 4,343 sf Storage= 17,130 cf Plug -Flow detention time= 147.5 min calculated for 0.749 of (94% of inflow) Center -of -Mass det. time= 125.9 min ( 915.1 - 789.3 ) Volume Invert Avail.Storage Storage Description #1 418.00' 29,593 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 418.00 1,493 0 0 419.00 1,914 1,704 1,704 420.00 2,380 2,147 3,851 421.00 2,888 2,634 6,485 422.00 3,430 3,159 9,644 423.00 3,995 3,713 13,356 424.00 4,379 4,187 17,543 425.00 4,734 4,557 22,100 426.00 5,058 4,896 26,996 426.50 5,330 2,597 29,593 Device Routino Invert Outlet Devices #1 Primary 417.90' 24.0" Round Culvert L= 117.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 417.90' / 417.01' S= 0.0075 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 3.14 sf #2 Device 1 418.00' 4.0" W x 4.2" H Vert. Orifice/Grate C= 0.600 #3 Device 1 423.92' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 424.99' 45.0' long x 5.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65 2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88 Primary OutFlow Max=1.34 cfs @ 12.63 hrs HW=423.91' (Free Discharge) 1_Cu lvert (Passes 1.34 cfs of 33.84 cfs potential flow) �2=Orifice/Grate (Orifice Controls 1.34 cfs @ 11.53 fps) 3=Orifice/Grate ( Controls 0.00 cfs) =Broad -Crested Rectangular Weir ( Controls 0.00 cfs) 2021-03-11 Full Routing Prepared by Timmons Grc 42 42 42 42 c 0 m 42 W 42 42 41 41 0 Type I/ 24-hr 1-YR Rainfall=3.05" Printed 3/11/2021 C Paae 31 Pond 10P: DRY POND Hydrograph Time (hours) Pond 10P: DRY POND Stage -Discharge 8 LU 4U UU aU lUU l[U 14U 1w laU LUU LLU 24U L(jU Discharge ids) ■ Irrflow ■ Primary ■ Primary 2021-03-11 Full Routing Prepared by Timmons Grc 42 42 42 42 c 0 m 4 W 42 42 41 41 Type // 24-hr 1-YR Rainfall=3.05- Printed 3/11/2021 C Page 32 Pond 10P: DRY POND Stage -Area -Storage Surface/Horizontal/Wetted Area (sq-ft) n 5nn 1 nnn 1 5nn 2 nnn 2 5nn n nnn ISM 4 nnn 4 5nn 5 nnn 22 6 5 4 3 1 ',. oo 0 y Custom Stage Data 6 0 5,000 10,000 15,000 20.000 25,000 Storage (cubic -feet) ■ Surface ■ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Pond 10P: DRY POND Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 418.00 0.00 5.50 0.00 0 418.00 0.00 6.00 0.00 0 418.00 0.00 6.50 0.00 0 418.00 0.00 7.00 0.00 0 418.00 0.00 7.50 0.00 0 418.00 0.00 8.00 0.00 0 418.00 0.00 8.50 0.00 0 418.00 0.00 9.00 0.02 10 418.01 0.00 9.50 0.05 61 418.04 0.01 10.00 0.10 150 418.10 0.03 10.50 0.18 289 418.19 0.09 11.00 0.34 500 418.32 0.19 11.50 0.75 941 418.58 0.36 12.00 17.26 11,569 422.54 1.17 12.50 1.67 17,065 423.89 1.34 13.00 1.04 16,924 423.86 1.34 13.50 0.80 16,164 423.68 1.32 14.00 0.63 15,096 423.43 1.29 14.50 0.56 13,871 423.13 1.25 15.00 0.51 12,616 422.81 1.21 15.50 0.45 11,340 422.48 1.16 16.00 0.40 10,049 422.12 1.12 16.50 0.37 8,773 421.74 1.06 17.00 0.35 7,562 421.36 1.00 17.50 0.33 6,424 420.98 0.94 18.00 0.31 5,365 420.60 0.87 18.50 0.29 4,393 420.22 0.80 19.00 0.27 3,516 419.86 0.73 19.50 0.25 2,741 419.51 0.65 20.00 0.23 2,076 419.19 0.57 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 418.00 0.00 418.10 0.03 418.20 0.10 418.30 0.18 418.40 0.26 418.50 0.32 418.60 0.36 418.70 0.41 418.80 0.44 418.90 0.48 419.00 0.51 419.10 0.54 419.20 0.57 419.30 0.60 419.40 0.62 419.50 0.65 419.60 0.67 419.70 0.69 419.80 0.72 419.90 0.74 420.00 0.76 420.10 0.78 420.20 0.80 420.30 0.82 420.40 0.84 420.50 0.86 420.60 0.87 420.70 0.89 420.80 0.91 420.90 0.93 421.00 0.94 421.10 0.96 421.20 0.98 421.30 0.99 421.40 1.01 421.50 1.02 421.60 1.04 421.70 1.05 421.80 1.07 421.90 1.08 422.00 1.10 422.10 1.11 422.20 1.13 422.30 1.14 422.40 1.15 422.50 1.17 422.60 1.18 422.70 1.19 422.80 1.21 422.90 1.22 423.00 1.23 423.10 1.25 Type 1124-hr 1-YR Rainfall=3.05" Stage -Discharge for Pond 10P: DRY POND Elevation Primary (feet) (cfs) 423.20 1.26 423.30 1.27 423.40 1.28 423.50 1.30 423.60 1.31 423.70 1.32 423.80 1.33 423.90 1.34 424.00 2.52 424.10 5.29 424.20 8.99 424.30 13.42 424.40 18.48 424.50 24.10 424.60 30.23 424.70 36.43 424.80 36.74 424.90 37.05 425.00 37.47 425.10 41.51 425.20 48.14 425.30 57.13 425.40 68.22 425.50 81.64 425.60 97.02 425.70 111.84 425.80 127.65 425.90 144.71 426.00 162.67 426.10 181.05 426.20 200.16 426.30 220.25 426.40 241.08 426.50 262.97 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Grc Type l/ 24-hr 1-YR Rainfall=3.05" Stage -Area -Storage for Pond 10P: DRY POND Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 418.00 1,493 0 418.10 1,535 151 418.20 1,577 307 418.30 1,619 467 418.40 1,661 631 418.50 1,704 799 418.60 1,746 972 418.70 1,788 1,148 418.80 1,830 1,329 418.90 1,872 1,514 419.00 1,914 1,704 419.10 1,961 1,897 419.20 2,007 2,096 419.30 2,054 2,299 419.40 2,100 2,506 419.50 2,147 2,719 419.60 2,194 2,936 419.70 2,240 3,157 419.80 2,287 3,384 419.90 2,333 3,615 420.00 2,380 3,851 420.10 2,431 4,091 420.20 2,482 4,337 420.30 2,532 4,587 420.40 2,583 4,843 420.50 2,634 5,104 420.60 2,685 5,370 420.70 2,736 5,641 420.80 2,786 5,917 420.90 2,837 6,198 421.00 2,888 6,485 421.10 2,942 6,776 421.20 2,996 7,073 421.30 3,051 7,375 421.40 3,105 7,683 421.50 3,159 7,996 421.60 3,213 8,315 421.70 3,267 8,639 421.80 3,322 8,968 421.90 3,376 9,303 422.00 3,430 9,644 422.10 3,487 9,989 422.20 3,543 10,341 422.30 3,600 10,698 422.40 3,656 11,061 422.50 3,713 11,429 422.60 3,769 11,803 422.70 3,825 12,183 422.80 3,882 12,568 422.90 3,938 12,959 423.00 3,995 13,356 423.10 4,033 13,757 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.20 4,072 14,163 423.30 4,110 14,572 423.40 4,149 14,985 423.50 4,187 15,402 423.60 4,225 15,822 423.70 4,264 16,247 423.80 4,302 16,675 423.90 4,341 17,107 424.00 4,379 17,543 424.10 4,415 17,983 424.20 4,450 18,426 424.30 4,486 18,873 424.40 4,521 19,323 424.50 4,557 19,777 424.60 4,592 20,234 424.70 4,627 20,695 424.80 4,663 21,160 424.90 4,698 21,628 425.00 4,734 22,100 425.10 4,766 22,575 425.20 4,799 23,053 425.30 4,831 23,534 425.40 4,864 24,019 425.50 4,896 24,507 425.60 4,928 24,998 425.70 4,961 25,493 425.80 4,993 25,990 425.90 5,026 26,491 426.00 5,058 26,996 426.10 5,112 27,504 426.20 5,167 28,018 426.30 5,221 28,537 426.40 5,276 29,062 426.50 6,330 29,593 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Printed 3/11/2021 Summary for Link 3L: PRE Combined Inflow Area = 16.080 ac, 4.48% Impervious, Inflow Depth > 0.37" for 1-YR event Inflow = 9.58 cfs @ 12.00 hrs, Volume= 0.499 of Primary = 9.58 cfs @ 12.00 hrs, Volume= 0.499 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs 10 9 8 7 6 0 5 LL 4 3 2 1 0 Link 3L: PRE Combined Hydrograph Time (hours) 1 1 1 1 1 1 1 1 ■ InMov ■ Primary 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Link 3L: PRE Combined Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 5.25 0.00 0.00 0.00 5.50 0.00 0.00 0.00 5.75 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.25 0.00 0.00 0.00 6.50 0.00 0.00 0.00 6.75 0.00 0.00 0.00 7.00 0.00 0.00 0.00 7.25 0.00 0.00 0.00 7.50 0.00 0.00 0.00 7.75 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.25 0.00 0.00 0.00 8.50 0.00 0.00 0.00 8.75 0.00 0.00 0.00 9.00 0.00 0.00 0.00 9.25 0.00 0.00 0.00 9.50 0.00 0.00 0.00 9.75 0.00 0.00 0.00 10.00 0.00 0.00 0.00 10.25 0.00 0.00 0.00 10.50 0.00 0.00 0.00 10.75 0.00 0.00 0.00 11.00 0.00 0.00 0.00 11.25 0.00 0.00 0.00 11.50 0.02 0.00 0.02 11.75 0.32 0.00 0.32 12.00 9.57 0.00 9.57 12.25 1.99 0.00 1.99 12.50 1.40 0.00 1.40 12.75 1.08 0.00 1.08 13.00 0.93 0.00 0.93 13.25 0.83 0.00 0.83 13.50 0.75 0.00 0.75 13.75 0.67 0.00 0.67 14.00 0.61 0.00 0.61 14.25 0.57 0.00 0.57 14.50 0.55 0.00 0.55 14.75 0.53 0.00 0.53 15.00 0.51 0.00 0.51 15.25 0.48 0.00 0.48 15.50 0.46 0.00 0.46 15.75 0.44 0.00 0.44 16.00 0.41 0.00 0.41 16.25 0.39 0.00 0.39 16.50 0.39 0.00 0.39 16.75 0.38 0.00 0.38 17.00 0.37 0.00 0.37 17.25 0.36 0.00 0.36 17.50 0.35 0.00 0.35 17.75 0.34 0.00 0.34 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 18.00 0.33 0.00 0.33 18.25 0.32 0.00 0.32 18.50 0.32 0.00 0.32 18.75 0.31 0.00 0.31 19.00 0.29 0.00 0.29 19.25 0.28 0.00 0.28 19.50 0.27 0.00 0.27 19.75 0.26 0.00 0.26 20.00 0.25 0.00 0.25 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Printed 3/11/2021 Summary for Link 13L: POST Combined Inflow Area = 16.220 ac, 55.49% Impervious, Inflow Depth > 0.90" for 1-YR event Inflow = 3.74 cfs @ 11.98 hrs, Volume= 1.223 of Primary = 3.74 cfs @ 11.98 hrs, Volume= 1.223 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 13L: POST Combined Hydrograph ■ Inflow ■ Primary Time (houm) 2021-03-11 Full Routing Prepared by Timmons Gro Type 1124-hr 1-YR Rainfall=3.05" Hydrograph for Link 13L: POST Combined Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 5.25 0.00 0.00 0.00 5.50 0.00 0.00 0.00 5.75 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.25 0.00 0.00 0.00 6.50 0.00 0.00 0.00 6.75 0.00 0.00 0.00 7.00 0.00 0.00 0.00 7.25 0.00 0.00 0.00 7.50 0.00 0.00 0.00 7.75 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.25 0.00 0.00 0.00 8.50 0.00 0.00 0.00 8.75 0.00 0.00 0.00 9.00 0.00 0.00 0.00 9.25 0.01 0.00 0.01 9.50 0.02 0.00 0.02 9.75 0.03 0.00 0.03 10.00 0.04 0.00 0.04 10.25 0.07 0.00 0.07 10.50 0.11 0.00 0.11 10.75 0.16 0.00 0.16 11.00 0.23 0.00 0.23 11.25 0.32 0.00 0.32 11.50 0.43 0.00 0.43 11.75 1.08 0.00 1.08 12.00 3.69 0.00 3.69 12.25 3.04 0.00 3.04 12.50 3.01 0.00 3.01 12.75 2.57 0.00 2.57 13.00 2.64 0.00 2.64 13.25 2.45 0.00 2.45 13.50 2.31 0.00 2.31 13.75 2.18 0.00 2.18 14.00 2.07 0.00 2.07 14.25 1.98 0.00 1.98 14.50 1.93 0.00 1.93 14.75 1.88 0.00 1.88 15.00 1.83 0.00 1.83 15.25 1.77 0.00 1.77 15.50 1.72 0.00 1.72 15.75 1.66 0.00 1.66 16.00 1.60 0.00 1.60 16.25 1.55 0.00 1.55 16.50 1.51 0.00 1.51 16.75 1.47 0.00 1.47 17.00 1.43 0.00 1.43 17.25 1.38 0.00 1.38 17.50 1.34 0.00 1.34 17.75 1.30 0.00 1.30 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 18.00 1.25 0.00 1.25 18.25 1.20 0.00 1.20 18.50 1.16 0.00 1.16 18.75 1.11 0.00 1.11 19.00 1.06 0.00 1.06 19.25 1.01 0.00 1.01 19.50 0.95 0.00 0.95 19.75 0.90 0.00 0.90 20.00 0.84 0.00 0.84 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 1S: PRE Onsite Runoff = 43.26 cfs @ 11.98 hrs, Volume= 1.889 af, Depth> 1.56" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 0.210 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 14.350 60 Woods, Fair, HSG B 14.560 61 Weighted Average 14.350 98.56% Pervious Area 0.210 1.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: PRE Onsite Hydrograph ■ Runoff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 1S: PRE Onsite Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.74 0.00 0.00 8.75 0.78 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.91 0.00 0.00 9.75 0.96 0.00 0.00 10.00 1.01 0.00 0.00 10.25 1.07 0.00 0.00 10.50 1.14 0.00 0.00 10.75 1.22 0.00 0.00 11.00 1.31 0.00 0.01 11.25 1.43 0.00 0.23 11.50 1.58 0.01 0.65 11.75 2.16 0.11 6.69 12.00 3.70 0.66 42.07 12.25 3.94 0.78 6.79 12.50 4.10 0.86 4.54 12.75 4.21 0.92 3.40 13.00 4.31 0.97 2.89 13.25 4.39 1.02 2.53 13.50 4.46 1.06 2.24 13.75 4.52 1.09 2.00 14.00 4.58 1.12 1.79 14.25 4.63 1.15 1.67 14.50 4.67 1.18 1.60 14.75 4.72 1.20 1.53 15.00 4.76 1.23 1.46 15.25 4.80 1.25 1.38 15.50 4.84 1.27 1.30 15.75 4.88 1.30 1.23 16.00 4.91 1.32 1.15 16.25 4.94 1.33 1.10 16.50 4.97 1.35 1.08 16.75 5.00 1.37 1.05 17.00 5.03 1.39 1.02 17.25 5.06 1.41 1.00 17.50 5.09 1.42 0.97 17.75 5.11 1.44 0.94 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 1.45 0.91 18.25 5.16 1.47 0.88 18.50 5.19 1.48 0.85 18.75 5.21 1.50 0.83 19.00 5.23 1.51 0.80 19.25 5.25 1.52 0.77 19.50 5.27 1.54 0.74 19.75 5.29 1.55 0.71 20.00 5.31 1.56 0.68 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 2S: Pre Offsite Runoff = 7.18 cfs @ 11.97 hrs, Volume= 0.320 af, Depth> 2.52" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 0.510 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 1.010 60 Woods, Fair, HSG B 1.520 73 Weighted Average 1.010 66.45% Pervious Area 0.510 33.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Pre Offsite Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 2S: Pre Mite Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.74 0.00 0.00 8.75 0.78 0.00 0.00 9.00 0.82 0.00 0.01 9.25 0.86 0.00 0.02 9.50 0.91 0.01 0.02 9.75 0.96 0.01 0.03 10.00 1.01 0.02 0.04 10.25 1.07 0.03 0.06 10.50 1.14 0.04 0.07 10.75 1.22 0.05 0.10 11.00 1.31 0.08 0.14 11.25 1.43 0.11 0.20 11.50 1.58 0.16 0.30 11.75 2.16 0.39 1.76 12.00 3.70 1.32 6.90 12.25 3.94 1.48 1.02 12.50 4.10 1.60 0.67 12.75 4.21 1.68 0.49 13.00 4.31 1.75 0.42 13.25 4.39 1.81 0.36 13.50 4.46 1.86 0.32 13.75 4.52 1.91 0.28 14.00 4.58 1.95 0.25 14.25 4.63 1.99 0.23 14.50 4.67 2.03 0.22 14.75 4.72 2.06 0.21 15.00 4.76 2.10 0.20 15.25 4.80 2.13 0.19 15.50 4.84 2.16 0.18 15.75 4.88 2.18 0.17 16.00 4.91 2.21 0.16 16.25 4.94 2.24 0.15 16.50 4.97 2.26 0.15 16.75 5.00 2.28 0.14 17.00 5.03 2.31 0.14 17.25 5.06 2.33 0.14 17.50 5.09 2.35 0.13 17.75 5.11 2.37 0.13 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 2.39 0.12 18.25 5.16 2.41 0.12 18.50 5.19 2.43 0.12 18.75 5.21 2.45 0.11 19.00 5.23 2.46 0.11 19.25 5.25 2.48 0.10 19.50 5.27 2.50 0.10 19.75 5.29 2.51 0.09 20.00 5.31 2.53 0.09 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 4S: Onsite To Bioretention 1 Runoff = 26.87 cfs @ 11.97 hrs, Volume= 1.246 af, Depth> 3.45" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 2.640 98 Paved parking, HSG B 1.430 61 >75% Grass cover, Good, HSG B 0.260 60 Woods, Fair, HSG B 4.330 83 Weighted Average 1.690 39.03% Pervious Area 2.640 60.97% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 4S: Onsite To Bioretention 1 Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 4S: Onsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.01 6.25 0.47 0.00 0.02 6.50 0.50 0.00 0.03 6.75 0.52 0.01 0.04 7.00 0.55 0.01 0.06 7.25 0.58 0.01 0.07 7.50 0.61 0.02 0.08 7.75 0.64 0.02 0.10 8.00 0.67 0.03 0.11 8.25 0.70 0.04 0.13 8.50 0.74 0.05 0.16 8.75 0.78 0.06 0.19 9.00 0.82 0.07 0.22 9.25 0.86 0.08 0.25 9.50 0.91 0.10 0.27 9.75 0.96 0.12 0.31 10.00 1.01 0.14 0.37 10.25 1.07 0.16 0.45 10.50 1.14 0.19 0.54 10.75 1.22 0.23 0.67 11.00 1.31 0.28 0.84 11.25 1.43 0.34 1.15 11.50 1.58 0.43 1.57 11.75 2.16 0.81 7.95 12.00 3.70 2.03 25.33 12.25 3.94 2.23 3.54 12.50 4.10 2.37 2.29 12.75 4.21 2.47 1.68 13.00 4.31 2.56 1.41 13.25 4.39 2.63 1.22 13.50 4.46 2.69 1.07 13.75 4.52 2.74 0.95 14.00 4.58 2.79 0.84 14.25 4.63 2.84 0.78 14.50 4.67 2.88 0.74 14.75 4.72 2.92 0.71 15.00 4.76 2.96 0.67 15.25 4.80 3.00 0.63 15.50 4.84 3.03 0.60 15.75 4.88 3.06 0.56 16.00 4.91 3.09 0.52 16.25 4.94 3.12 0.50 16.50 4.97 3.15 0.48 16.75 5.00 3.18 0.47 17.00 5.03 3.20 0.46 17.25 5.06 3.23 0.44 17.50 5.09 3.25 0.43 17.75 5.11 3.28 0.42 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 3.30 0.40 18.25 5.16 3.32 0.39 18.50 5.19 3.34 0.38 18.75 5.21 3.37 0.36 19.00 5.23 3.39 0.35 19.25 5.25 3.40 0.34 19.50 5.27 3.42 0.32 19.75 5.29 3.44 0.31 20.00 5.31 3.46 0.29 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 5S: Mite To Bioretention 1 Runoff = 7.18 cfs @ 11.97 hrs, Volume= 0.320 af, Depth> 2.52" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 0.510 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 1.010 60 Woods, Fair, HSG B 1.520 73 Weighted Average 1.010 66.45% Pervious Area 0.510 33.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Mite To Bioretention 1 Hydrograph ❑ RunoH Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 5S: Offsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.74 0.00 0.00 8.75 0.78 0.00 0.00 9.00 0.82 0.00 0.01 9.25 0.86 0.00 0.02 9.50 0.91 0.01 0.02 9.75 0.96 0.01 0.03 10.00 1.01 0.02 0.04 10.25 1.07 0.03 0.06 10.50 1.14 0.04 0.07 10.75 1.22 0.05 0.10 11.00 1.31 0.08 0.14 11.25 1.43 0.11 0.20 11.50 1.58 0.16 0.30 11.75 2.16 0.39 1.76 12.00 3.70 1.32 6.90 12.25 3.94 1.48 1.02 12.50 4.10 1.60 0.67 12.75 4.21 1.68 0.49 13.00 4.31 1.75 0.42 13.25 4.39 1.81 0.36 13.50 4.46 1.86 0.32 13.75 4.52 1.91 0.28 14.00 4.58 1.95 0.25 14.25 4.63 1.99 0.23 14.50 4.67 2.03 0.22 14.75 4.72 2.06 0.21 15.00 4.76 2.10 0.20 15.25 4.80 2.13 0.19 15.50 4.84 2.16 0.18 15.75 4.88 2.18 0.17 16.00 4.91 2.21 0.16 16.25 4.94 2.24 0.15 16.50 4.97 2.26 0.15 16.75 5.00 2.28 0.14 17.00 5.03 2.31 0.14 17.25 5.06 2.33 0.14 17.50 5.09 2.35 0.13 17.75 5.11 2.37 0.13 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 2.39 0.12 18.25 5.16 2.41 0.12 18.50 5.19 2.43 0.12 18.75 5.21 2.45 0.11 19.00 5.23 2.46 0.11 19.25 5.25 2.48 0.10 19.50 5.27 2.50 0.10 19.75 5.29 2.51 0.09 20.00 5.31 2.53 0.09 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 7S: To Bioretention 2 Runoff = 11.37 cfs @ 11.97 hrs, Volume= 0.521 af, Depth> 3.26" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 1.040 98 Paved parking, HSG B 0.840 61 >75% Grass cover, Good, HSG B 0.040 60 Woods, Fair, HSG B 1.920 81 Weighted Average 0.880 45.83% Pervious Area 1.040 54.17% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: To Bioretention 2 Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 7S: To Bioretention 2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.01 7.00 0.55 0.00 0.01 7.25 0.58 0.01 0.02 7.50 0.61 0.01 0.02 7.75 0.64 0.01 0.03 8.00 0.67 0.02 0.03 8.25 0.70 0.02 0.04 8.50 0.74 0.03 0.05 8.75 0.78 0.04 0.06 9.00 0.82 0.05 0.08 9.25 0.86 0.06 0.09 9.50 0.91 0.07 0.10 9.75 0.96 0.08 0.11 10.00 1.01 0.10 0.14 10.25 1.07 0.12 0.17 10.50 1.14 0.15 0.21 10.75 1.22 0.18 0.26 11.00 1.31 0.22 0.33 11.25 1.43 0.28 0.45 11.50 1.58 0.36 0.63 11.75 2.16 0.71 3.25 12.00 3.70 1.87 10.75 12.25 3.94 2.07 1.52 12.50 4.10 2.21 0.98 12.75 4.21 2.30 0.72 13.00 4.31 2.38 0.61 13.25 4.39 2.45 0.52 13.50 4.46 2.51 0.46 13.75 4.52 2.57 0.41 14.00 4.58 2.61 0.36 14.25 4.63 2.66 0.34 14.50 4.67 2.70 0.32 14.75 4.72 2.74 0.31 15.00 4.76 2.78 0.29 15.25 4.80 2.81 0.27 15.50 4.84 2.85 0.26 15.75 4.88 2.88 0.24 16.00 4.91 2.91 0.22 16.25 4.94 2.93 0.22 16.50 4.97 2.96 0.21 16.75 5.00 2.99 0.20 17.00 5.03 3.01 0.20 17.25 5.06 3.04 0.19 17.50 5.09 3.06 0.19 17.75 5.11 3.09 0.18 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 3.11 0.17 18.25 5.16 3.13 0.17 18.50 5.19 3.15 0.16 18.75 5.21 3.17 0.16 19.00 5.23 3.19 0.15 19.25 5.25 3.21 0.15 19.50 5.27 3.23 0.14 19.75 5.29 3.25 0.13 20.00 5.31 3.26 0.13 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 9S: To Dry Pond Runoff = 43.50 cfs @ 11.97 hrs, Volume= 2.017 af, Depth> 3.45" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 4.240 98 Paved parking, HSG B 2.770 61 >75% Grass cover, Good, HSG B 0.000 60 Woods, Fair, HSG B 7.010 83 Weighted Average 2.770 39.51 % Pervious Area 4.240 60.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 9S: To Dry Pond Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 9S: To Dry Pond Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.02 6.25 0.47 0.00 0.04 6.50 0.50 0.00 0.05 6.75 0.52 0.01 0.07 7.00 0.55 0.01 0.09 7.25 0.58 0.01 0.11 7.50 0.61 0.02 0.13 7.75 0.64 0.02 0.15 8.00 0.67 0.03 0.18 8.25 0.70 0.04 0.21 8.50 0.74 0.05 0.26 8.75 0.78 0.06 0.31 9.00 0.82 0.07 0.36 9.25 0.86 0.08 0.41 9.50 0.91 0.10 0.44 9.75 0.96 0.12 0.50 10.00 1.01 0.14 0.60 10.25 1.07 0.16 0.72 10.50 1.14 0.19 0.87 10.75 1.22 0.23 1.09 11.00 1.31 0.28 1.36 11.25 1.43 0.34 1.86 11.50 1.58 0.43 2.54 11.75 2.16 0.81 12.86 12.00 3.70 2.03 41.00 12.25 3.94 2.23 5.72 12.50 4.10 2.37 3.71 12.75 4.21 2.47 2.72 13.00 4.31 2.56 2.28 13.25 4.39 2.63 1.97 13.50 4.46 2.69 1.73 13.75 4.52 2.74 1.54 14.00 4.58 2.79 1.36 14.25 4.63 2.84 1.26 14.50 4.67 2.88 1.20 14.75 4.72 2.92 1.14 15.00 4.76 2.96 1.08 15.25 4.80 3.00 1.02 15.50 4.84 3.03 0.96 15.75 4.88 3.06 0.90 16.00 4.91 3.09 0.84 16.25 4.94 3.12 0.81 16.50 4.97 3.15 0.78 16.75 5.00 3.18 0.76 17.00 5.03 3.20 0.74 17.25 5.06 3.23 0.72 17.50 5.09 3.25 0.70 17.75 5.11 3.28 0.68 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 3.30 0.65 18.25 5.16 3.32 0.63 18.50 5.19 3.34 0.61 18.75 5.21 3.37 0.59 19.00 5.23 3.39 0.57 19.25 5.25 3.40 0.54 19.50 5.27 3.42 0.52 19.75 5.29 3.44 0.50 20.00 5.31 3.46 0.48 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Printed 3/11/2021 Summary for Subcatchment 11S: Onsite Unrouted 4 Runoff = 2.43 cfs @ 11.98 hrs, Volume= 0.106 af, Depth> 2.02" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN Description 0.110 98 Paved parking, HSG B 0.380 61 >75% Grass cover, Good, HSG B 0.140 60 Woods, Fair, HSG B 0.630 67 Weighted Average 0.520 82.54% Pervious Area 0.110 17.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: Onsite Unrouted 4 Hydrograph 2 43 da Type II 24-hr I10-YR Rainfall=5.58" Runoff Area=0.630 ac Runoff Volume=0.106 of Runoff Depth>2.02" Tc=6.0 min CN=67 5 b 1 8 9 1U 11 12 iJ 14 15 1U I 18 19 2U Time (hours) ❑ RunoH 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 11S: Onsite Unrouted 4 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.00 0.00 8.00 0.67 0.00 0.00 8.25 0.70 0.00 0.00 8.50 0.74 0.00 0.00 8.75 0.78 0.00 0.00 9.00 0.82 0.00 0.00 9.25 0.86 0.00 0.00 9.50 0.91 0.00 0.00 9.75 0.96 0.00 0.00 10.00 1.01 0.00 0.00 10.25 1.07 0.00 0.00 10.50 1.14 0.00 0.01 10.75 1.22 0.01 0.02 11.00 1.31 0.02 0.03 11.25 1.43 0.04 0.04 11.50 1.58 0.06 0.07 11.75 2.16 0.23 0.50 12.00 3.70 0.96 2.34 12.25 3.94 1.11 0.36 12.50 4.10 1.21 0.24 12.75 4.21 1.28 0.18 13.00 4.31 1.34 0.15 13.25 4.39 1.39 0.13 13.50 4.46 1.44 0.11 13.75 4.52 1.48 0.10 14.00 4.58 1.51 0.09 14.25 4.63 1.55 0.09 14.50 4.67 1.58 0.08 14.75 4.72 1.61 0.08 15.00 4.76 1.64 0.07 15.25 4.80 1.67 0.07 15.50 4.84 1.69 0.07 15.75 4.88 1.72 0.06 16.00 4.91 1.74 0.06 16.25 4.94 1.76 0.06 16.50 4.97 1.78 0.05 16.75 5.00 1.80 0.05 17.00 5.03 1.83 0.05 17.25 5.06 1.84 0.05 17.50 5.09 1.86 0.05 17.75 5.11 1.88 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 1.90 0.05 18.25 5.16 1.92 0.04 18.50 5.19 1.93 0.04 18.75 5.21 1.95 0.04 19.00 5.23 1.97 0.04 19.25 5.25 1.98 0.04 19.50 5.27 2.00 0.04 19.75 5.29 2.01 0.04 20.00 5.31 2.02 0.03 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Subcatchment 12S: Onsite Unrouted 5 Runoff = 4.91 cfs @ 11.97 hrs, Volume= 0.226 af, Depth> 3.36" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=5.58" Area (ac) CN 0.460 98 Paved parking, HSG B 0.310 61 >75% Grass cover, Good, HSG B 0.040 60 Woods, Fair, HSG B 0.810 82 Weighted Average 0.350 43.21 % Pervious Area 0.460 56.79% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 12S: Onsite Unrouted 5 Hydrograph ❑ RunoH Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Subcatchment 12S: Onsite Unrouted 5 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.01 7.00 0.55 0.01 0.01 7.25 0.58 0.01 0.01 7.50 0.61 0.01 0.01 7.75 0.64 0.02 0.01 8.00 0.67 0.02 0.02 8.25 0.70 0.03 0.02 8.50 0.74 0.04 0.03 8.75 0.78 0.05 0.03 9.00 0.82 0.06 0.04 9.25 0.86 0.07 0.04 9.50 0.91 0.08 0.05 9.75 0.96 0.10 0.05 10.00 1.01 0.12 0.06 10.25 1.07 0.14 0.08 10.50 1.14 0.17 0.09 10.75 1.22 0.20 0.12 11.00 1.31 0.25 0.15 11.25 1.43 0.31 0.20 11.50 1.58 0.39 0.28 11.75 2.16 0.76 1.43 12.00 3.70 1.95 4.64 12.25 3.94 2.15 0.65 12.50 4.10 2.29 0.42 12.75 4.21 2.39 0.31 13.00 4.31 2.47 0.26 13.25 4.39 2.54 0.22 13.50 4.46 2.60 0.20 13.75 4.52 2.65 0.18 14.00 4.58 2.70 0.16 14.25 4.63 2.75 0.14 14.50 4.67 2.79 0.14 14.75 4.72 2.83 0.13 15.00 4.76 2.87 0.12 15.25 4.80 2.90 0.12 15.50 4.84 2.94 0.11 15.75 4.88 2.97 0.10 16.00 4.91 3.00 0.10 16.25 4.94 3.03 0.09 16.50 4.97 3.05 0.09 16.75 5.00 3.08 0.09 17.00 5.03 3.11 0.08 17.25 5.06 3.13 0.08 17.50 5.09 3.16 0.08 17.75 5.11 3.18 0.08 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 5.14 3.20 0.07 18.25 5.16 3.23 0.07 18.50 5.19 3.25 0.07 18.75 5.21 3.27 0.07 19.00 5.23 3.29 0.06 19.25 5.25 3.31 0.06 19.50 5.27 3.33 0.06 19.75 5.29 3.34 0.06 20.00 5.31 3.36 0.05 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Pond 6P: BIORETENTION 1 Printed 3/11/2021 Inflow Area = 5.850 ac, 53.85% Impervious, Inflow Depth > 3.21" for 10-YR event Inflow = 34.04 cfs @ 11.97 hrs, Volume= 1.566 of Outflow = 32.79 cfs @ 11.99 hrs, Volume= 1.254 af, Atten= 4%, Lag= 1.5 min Primary = 32.79 cfs @ 11.99 hrs, Volume= 1.254 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 415.74' @ 11.99 hrs Surf.Area= 6,228 sf Storage= 17,664 cf Plug -Flow detention time= 85.4 min calculated for 1.254 of (80% of inflow) Center -of -Mass det. time= 30.9 min ( 803.7 - 772.8 ) Volume Invert Avail.Storage Storage Description #1 407.00' 30,851 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 407.00 3,808 0.0 0 0 411.00 3,808 40.0 6,093 6,093 414.00 3,808 25.0 2,856 8,949 415.00 5,174 100.0 4,491 13,440 416.00 6,596 100.0 5,885 19,325 417.50 8,772 100.0 11,526 30,851 Device Routing Invert Outlet Devices #1 Primary 409.71' 36.0" Round HDPE_Round 36" L= 47.6' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 409.71' / 409.00' S= 0.0149 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 7.07 sf #2 Device 1 415.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 415.85' 15.0' long x 1.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 Primary OutFlow Max=32.20 cfs @ 11.99 hrs HW=415.73' (Free Discharge) 11=HDPE Round 36" (Passes 32.20 cfs of 72.38 cfs potential flow) t2=Orifice/Grate (Weir Controls 32.20 cfs @ 2.80 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 2021-03-11 Full Routing Prepared by Timmons Gro W Type/1 24-hr 10-YR Rainfall=5.58" Printed 3/11/2021 Pond 6P: BIORETENTION 1 Hydrograph 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 6P: BIORETENTION 1 Stage -Discharge Discharge ids) ■ InMoa ■ Primary ❑ Primary 2021-03-11 Full Routing Prepared by Timmons Grc Type 1124-hr 10-YR Rainfall=5.58" Pond 6P: BIORETENTION 1 Stage -Area -Storage Storage (cubic -feet) Printed 3/11/2021 ■ Surface ■ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Pond 6P: BIORETENTION 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 407.00 0.00 5.50 0.00 0 407.00 0.00 6.00 0.01 6 407.00 0.00 6.50 0.03 46 407.03 0.00 7.00 0.06 127 407.08 0.00 7.50 0.08 252 407.17 0.00 8.00 0.11 423 407.28 0.00 8.50 0.16 659 407.43 0.00 9.00 0.23 1,007 407.66 0.00 9.50 0.29 1,485 407.97 0.00 10.00 0.41 2,101 408.38 0.00 10.50 0.61 3,009 408.98 0.00 11.00 0.98 4,417 409.90 0.00 11.50 1.87 6,889 411.84 0.00 12.00 32.23 17,657 415.74 32.72 12.50 2.96 14,264 415.16 3.28 13.00 1.83 14,003 415.11 1.90 13.50 1.39 13,914 415.09 1.43 14.00 1.09 13,841 415.08 1.15 14.50 0.97 13,784 415.07 0.99 15.00 0.87 13,751 415.06 0.89 15.50 0.77 13,717 415.05 0.79 16.00 0.68 13,683 415.05 0.70 16.50 0.63 13,663 415.04 0.64 17.00 0.60 13,651 415.04 0.60 17.50 0.56 13,639 415.04 0.57 18.00 0.53 13,626 415.04 0.53 18.50 0.49 13,614 415.03 0.50 19.00 0.46 13,602 415.03 0.46 19.50 0.42 13,589 415.03 0.43 20.00 0.38 13,577 415.03 0.39 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 407.00 0.00 407.06 0.00 407.12 0.00 407.18 0.00 407.24 0.00 407.30 0.00 407.36 0.00 407.42 0.00 407.48 0.00 407.54 0.00 407.60 0.00 407.66 0.00 407.72 0.00 407.78 0.00 407.84 0.00 407.90 0.00 407.96 0.00 408.02 0.00 408.08 0.00 408.14 0.00 408.20 0.00 408.26 0.00 408.32 0.00 408.38 0.00 408.44 0.00 408.50 0.00 408.56 0.00 408.62 0.00 408.68 0.00 408.74 0.00 408.80 0.00 408.86 0.00 408.92 0.00 408.98 0.00 409.04 0.00 409.10 0.00 409.16 0.00 409.22 0.00 409.28 0.00 409.34 0.00 409.40 0.00 409.46 0.00 409.52 0.00 409.58 0.00 409.64 0.00 409.70 0.00 409.76 0.00 409.82 0.00 409.88 0.00 409.94 0.00 410.00 0.00 410.06 0.00 Type/1 24-hr 10-YR Rainfall=5.58" Stage -Discharge for Pond 6P: BIORETENTION 1 Elevation Primary (feet) (cfs) 410.12 0.00 410.18 0.00 410.24 0.00 410.30 0.00 410.36 0.00 410.42 0.00 410.48 0.00 410.54 0.00 410.60 0.00 410.66 0.00 410.72 0.00 410.78 0.00 410.84 0.00 410.90 0.00 410.96 0.00 411.02 0.00 411.08 0.00 411.14 0.00 411.20 0.00 411.26 0.00 411.32 0.00 411.38 0.00 411.44 0.00 411.50 0.00 411.56 0.00 411.62 0.00 411.68 0.00 411.74 0.00 411.80 0.00 411.86 0.00 411.92 0.00 411.98 0.00 412.04 0.00 412.10 0.00 412.16 0.00 412.22 0.00 412.28 0.00 412.34 0.00 412.40 0.00 412.46 0.00 412.52 0.00 412.58 0.00 412.64 0.00 412.70 0.00 412.76 0.00 412.82 0.00 412.88 0.00 412.94 0.00 413.00 0.00 413.06 0.00 413.12 0.00 413.18 0.00 Elevation Primary (feet) (cfs) 413.24 0.00 413.30 0.00 413.36 0.00 413.42 0.00 413.48 0.00 413.54 0.00 413.60 0.00 413.66 0.00 413.72 0.00 413.78 0.00 413.84 0.00 413.90 0.00 413.96 0.00 414.02 0.00 414.08 0.00 414.14 0.00 414.20 0.00 414.26 0.00 414.32 0.00 414.38 0.00 414.44 0.00 414.50 0.00 414.56 0.00 414.62 0.00 414.68 0.00 414.74 0.00 414.80 0.00 414.86 0.00 414.92 0.00 414.98 0.00 415.04 0.41 415.10 1.62 415.16 3.29 415.22 5.30 415.28 7.61 415.34 10.18 415.40 12.99 415.46 16.03 415.52 19.26 415.58 22.69 415.64 26.30 415.70 30.08 415.76 34.03 415.82 38.14 415.88 42.61 415.94 47.90 416.00 53.71 416.06 59.94 416.12 66.57 416.18 73.54 416.24 80.86 416.30 88.48 Printed 3/11/2021 Elevation Primary (feet) (cfs) 416.36 92.19 416.42 95.41 416.48 98.87 416.54 102.61 416.60 106.54 416.66 110.69 416.72 115.14 416.78 119.80 416.84 124.69 416.90 129.68 416.96 134.85 417.02 140.22 417.08 145.85 417.14 151.76 417.20 157.88 417.26 164.18 417.32 170.43 417.38 176.86 417.44 183.47 417.50 189.88 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Stage -Area -Storage for Pond 6P: BIORETENTION 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 407.00 3,808 0 407.15 3,808 228 407.30 3,808 457 407.45 3,808 685 407.60 3,808 914 407.75 3,808 1,142 407.90 3,808 1,371 408.05 3,808 1,599 408.20 3,808 1,828 408.35 3,808 2,056 408.50 3,808 2,285 408.65 3,808 2,513 408.80 3,808 2,742 408.95 3,808 2,970 409.10 3,808 3,199 409.25 3,808 3,427 409.40 3,808 3,656 409.55 3,808 3,884 409.70 3,808 4,113 409.85 3,808 4,341 410.00 3,808 4,570 410.15 3,808 4,798 410.30 3,808 5,027 410.45 3,808 5,255 410.60 3,808 5,484 410.75 3,808 5,712 410.90 3,808 5,940 411.05 3,808 6,140 411.20 3,808 6,283 411.35 3,808 6,426 411.50 3,808 6,569 411.65 3,808 6,712 411.80 3,808 6,854 411.95 3,808 6,997 412.10 3,808 7,140 412.25 3,808 7,283 412.40 3,808 7,426 412.55 3,808 7,568 412.70 3,808 7,711 412.85 3,808 7,854 413.00 3,808 7,997 413.15 3,808 8,140 413.30 3,808 8,282 413.45 3,808 8,425 413.60 3,808 8,568 413.75 3,808 8,711 413.90 3,808 8,854 414.05 3,876 9,141 414.20 4,081 9,738 414.35 4,286 10,365 414.50 4,491 11,024 414.65 4,696 11,713 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 414.80 4,901 12,432 414.95 5,106 13,183 415.10 5,316 13,964 415.25 5,530 14,778 415.40 5,743 15,623 415.55 5,956 16,501 415.70 6,169 17,410 415.85 6,383 18,351 416.00 6,596 19,325 416.15 6,814 20,331 416.30 7,031 21,369 416.45 7,249 22,440 416.60 7,466 23,544 416.75 7,684 24,680 416.90 7,902 25,849 417.05 8,119 27,050 417.20 8,337 28,284 417.35 8,554 29,551 417.50 8,772 30,851 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Pond 8P: BIORETENTION 2 Printed 3/11/2021 Inflow Area = 1.920 ac, 54.17% Impervious, Inflow Depth > 3.26" for 10-YR event Inflow = 11.37 cfs @ 11.97 hrs, Volume= 0.521 of Outflow = 11.19 cfs @ 11.99 hrs, Volume= 0.394 af, Atten= 2%, Lag= 1.1 min Primary = 11.19 cfs @ 11.99 hrs, Volume= 0.394 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 432.42' @ 11.99 hrs Surf.Area= 2,170 sf Storage= 6,589 cf Plug -Flow detention time= 95.9 min calculated for 0.394 of (76% of inflow) Center -of -Mass det. time= 35.2 min ( 808.4 - 773.2 ) Volume Invert Avail.Storage Storage Description #1 423.91' 10,323 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 423.91 1,587 0.0 0 0 427.91 1,587 40.0 2,539 2,539 430.91 1,587 25.0 1,190 3,729 431.00 1,627 100.0 145 3,874 432.00 2,041 100.0 1,834 5,708 433.00 2,350 100.0 2,196 7,904 434.00 2,489 100.0 2,420 10,323 Device Routino Invert Outlet Devices #1 Primary 424.43' 18.0" Round HDPE_Round 18" L= 61.4' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 424.43' / 423.82' S= 0.0099 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 1.77 sf #2 Device 1 431.91' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=10.83 cfs @ 11.99 hrs HW=432.41' (Free Discharge) L1=HDPE_Round 18" (Passes 10.83 cfs of 22.88 cfs potential flow) t2=Orifice/Grate (Weir Controls 10.83 cfs @ 2.31 fps) 2021-03-11 Full Routing Prepared by Timmons Grc i c m m W Type 1124-hr 10-YR Rainfall=5.58" Pond 8P: BIORETENTION 2 Hydrograph Time (hours) Pond 813: BIORETENTION 2 Stage -Discharge 434 433 L - 432 431 430 429428427 426 425424 6 10 12 14 16 16 20 22 24 Discharge (de) Printed 3/11/2021 ■ Inflow ■ Primary ❑ Primary 2021-03-11 Full Routing Prepared by Timmons Grc Type 1124-hr 10-YR Rainfall=5.58" Pond 8P: BIORETENTION 2 Stage -Area -Storage Storage (cubic -feet) Printed 3/11/2021 ■ Surface ■ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Pond 8P: BIORETENTION 2 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 423.91 0.00 5.50 0.00 0 423.91 0.00 6.00 0.00 0 423.91 0.00 6.50 0.00 1 423.91 0.00 7.00 0.01 15 423.93 0.00 7.50 0.02 47 423.98 0.00 8.00 0.03 98 424.07 0.00 8.50 0.05 175 424.19 0.00 9.00 0.08 292 424.37 0.00 9.50 0.10 452 424.62 0.00 10.00 0.14 659 424.95 0.00 10.50 0.21 965 425.43 0.00 11.00 0.33 1,438 426.17 0.00 11.50 0.63 2,267 427.48 0.00 12.00 10.75 6,580 432.41 11.06 12.50 0.98 5,735 432.01 1.05 13.00 0.61 5,676 431.98 0.63 13.50 0.46 5,643 431.97 0.48 14.00 0.36 5,618 431.96 0.38 14.50 0.32 5,606 431.95 0.33 15.00 0.29 5,598 431.95 0.29 15.50 0.26 5,590 431.94 0.26 16.00 0.22 5,582 431.94 0.23 16.50 0.21 5,578 431.94 0.21 17.00 0.20 5,575 431.93 0.20 17.50 0.19 5,572 431.93 0.19 18.00 0.17 5,569 431.93 0.18 18.50 0.16 5,566 431.93 0.16 19.00 0.15 5,563 431.93 0.15 19.50 0.14 5,561 431.93 0.14 20.00 0.13 5,558 431.93 0.13 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 423.91 0.00 423.97 0.00 424.03 0.00 424.09 0.00 424.15 0.00 424.21 0.00 424.27 0.00 424.33 0.00 424.39 0.00 424.45 0.00 424.51 0.00 424.57 0.00 424.63 0.00 424.69 0.00 424.75 0.00 424.81 0.00 424.87 0.00 424.93 0.00 424.99 0.00 425.05 0.00 425.11 0.00 425.17 0.00 425.23 0.00 425.29 0.00 425.35 0.00 425.41 0.00 425.47 0.00 425.53 0.00 425.59 0.00 425.65 0.00 425.71 0.00 425.77 0.00 425.83 0.00 425.89 0.00 425.95 0.00 426.01 0.00 426.07 0.00 426.13 0.00 426.19 0.00 426.25 0.00 426.31 0.00 426.37 0.00 426.43 0.00 426.49 0.00 426.55 0.00 426.61 0.00 426.67 0.00 426.73 0.00 426.79 0.00 426.85 0.00 426.91 0.00 426.97 0.00 Type 1124-hr 10-YR Rainfall=5.58" Stage -Discharge for Pond 8P: BIORETENTION 2 Elevation Primary (feet) (cfs) 427.03 0.00 427.09 0.00 427.15 0.00 427.21 0.00 427.27 0.00 427.33 0.00 427.39 0.00 427.45 0.00 427.51 0.00 427.57 0.00 427.63 0.00 427.69 0.00 427.75 0.00 427.81 0.00 427.87 0.00 427.93 0.00 427.99 0.00 428.05 0.00 428.11 0.00 428.17 0.00 428.23 0.00 428.29 0.00 428.35 0.00 428.41 0.00 428.47 0.00 428.53 0.00 428.59 0.00 428.65 0.00 428.71 0.00 428.77 0.00 428.83 0.00 428.89 0.00 428.95 0.00 429.01 0.00 429.07 0.00 429.13 0.00 429.19 0.00 429.25 0.00 429.31 0.00 429.37 0.00 429.43 0.00 429.49 0.00 429.55 0.00 429.61 0.00 429.67 0.00 429.73 0.00 429.79 0.00 429.85 0.00 429.91 0.00 429.97 0.00 430.03 0.00 430.09 0.00 Elevation Primary (feet) (cfs) 430.15 0.00 430.21 0.00 430.27 0.00 430.33 0.00 430.39 0.00 430.45 0.00 430.51 0.00 430.57 0.00 430.63 0.00 430.69 0.00 430.75 0.00 430.81 0.00 430.87 0.00 430.93 0.00 430.99 0.00 431.05 0.00 431.11 0.00 431.17 0.00 431.23 0.00 431.29 0.00 431.35 0.00 431.41 0.00 431.47 0.00 431.53 0.00 431.59 0.00 431.65 0.00 431.71 0.00 431.77 0.00 431.83 0.00 431.89 0.00 431.95 0.25 432.01 0.97 432.07 1.97 432.13 3.18 432.19 4.57 432.25 6.11 432.31 7.80 432.37 9.62 432.43 11.56 432.49 13.61 432.55 15.78 432.61 18.05 432.67 20.42 432.73 22.88 432.79 23.47 432.85 23.56 432.91 23.66 432.97 23.75 433.03 23.84 433.09 23.93 433.15 24.02 433.21 24.11 Printed 3/11/2021 Elevation Primary (feet) (cfs) 433.27 24.20 433.33 24.29 433.39 24.38 433.45 24.47 433.51 24.56 433.57 24.65 433.63 24.73 433.69 24.82 433.75 24.91 433.81 25.00 433.87 25.08 433.93 25.17 433.99 25.26 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Stage -Area -Storage for Pond 8P: BIORETENTION 2 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.91 1,587 0 424.06 1,587 95 424.21 1,587 190 424.36 1,587 286 424.51 1,587 381 424.66 1,587 476 424.81 1,587 571 424.96 1,587 667 425.11 1,587 762 425.26 1,587 857 425.41 1,587 952 425.56 1,587 1,047 425.71 1,587 1,143 425.86 1,587 1,238 426.01 1,587 1,333 426.16 1,587 1,428 426.31 1,587 1,524 426.46 1,587 1,619 426.61 1,587 1,714 426.76 1,587 1,809 426.91 1,587 1,904 427.06 1,587 2,000 427.21 1,587 2,095 427.36 1,587 2,190 427.51 1,587 2,285 427.66 1,587 2,381 427.81 1,587 2,476 427.96 1,587 2,559 428.11 1,587 2,619 428.26 1,587 2,678 428.41 1,587 2,738 428.56 1,587 2,797 428.71 1,587 2,857 428.86 1,587 2,916 429.01 1,587 2,976 429.16 1,587 3,035 429.31 1,587 3,095 429.46 1,587 3,154 429.61 1,587 3,214 429.76 1,587 3,273 429.91 1,587 3,333 430.06 1,587 3,392 430.21 1,587 3,452 430.36 1,587 3,511 430.51 1,587 3,571 430.66 1,587 3,630 430.81 1,587 3,690 430.96 1,609 3,809 431.11 1,673 4,056 431.26 1,735 4,311 431.41 1,797 4,576 431.56 1,859 4,850 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 431.71 1,921 5,134 431.86 1,983 5,426 432.01 2,044 5,729 432.16 2,090 6,039 432.31 2,137 6,356 432.46 2,183 6,680 432.61 2,229 7,011 432.76 2,276 7,348 432.91 2,322 7,693 433.06 2,358 8,045 433.21 2,379 8,400 433.36 2,400 8,759 433.51 2,421 9,120 433.66 2,442 9,485 433.81 2,463 9,853 433.96 2,483 10,224 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Summary for Pond 10P: DRY POND Printed 3/11/2021 Inflow Area = 7.010 ac, 60.49% Impervious, Inflow Depth > 3.45" for 10-YR event Inflow = 43.50 cfs @ 11.97 hrs, Volume= 2.017 of Outflow = 37.35 cfs @ 12.00 hrs, Volume= 1.836 af, Atten= 14%, Lag= 2.2 min Primary = 37.35 cfs @ 12.00 hrs, Volume= 1.836 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 424.99' @ 12.00 hrs Surf.Area= 4,731 sf Storage= 22,063 cf Plug -Flow detention time= 84.0 min calculated for 1.836 of (91% of inflow) Center -of -Mass det. time= 52.5 min ( 821.3 - 768.8 ) Volume Invert Avail.Storage Storage Description #1 418.00' 29,593 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 418.00 1,493 0 0 419.00 1,914 1,704 1,704 420.00 2,380 2,147 3,851 421.00 2,888 2,634 6,485 422.00 3,430 3,159 9,644 423.00 3,995 3,713 13,356 424.00 4,379 4,187 17,543 425.00 4,734 4,557 22,100 426.00 5,058 4,896 26,996 426.50 5,330 2,597 29,593 Device Routino Invert Outlet Devices #1 Primary 417.90' 24.0" Round Culvert L= 117.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 417.90' / 417.01' S= 0.0075 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 3.14 sf #2 Device 1 418.00' 4.0" W x 4.2" H Vert. Orifice/Grate C= 0.600 #3 Device 1 423.92' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 424.99' 45.0' long x 5.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65 2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88 Primary OutFlow Max=37.31 cfs @ 12.00 hrs HW=424.98' (Free Discharge) 1_Cu lvert (Inlet Controls 37.31 cfs @ 11.87 fps) �2=Orifice/Grate (Passes < 1.47 cfs potential flow) 3=Orifice/Grate (Passes < 56.23 cfs potential flow) =Broad -Crested Rectangular Weir ( Controls 0.00 cfs) 2021-03-11 Full Routing Prepared by Timmons Grc 42 42 42 42 c 0 m 42 W 42 42 41 41 0 Type 1124-hr 10-YR Rainfall=5.58" Printed 3/11/2021 LC Pape 69 Pond 10P: DRY POND Hydrograph Time (hours) Pond 10P: DRY POND Stage -Discharge 8 LU 4U UU aU lUU l[U 14U 1w laU LUU LLU 24U L(jU Discharge ids) Fill—, —fl M ■ Primary 0 Primary 2021-03-11 Full Routing Prepared by Timmons Grc 42 42 42 42 c 0 m 4 W 42 42 41 41 Type 1124-hr 10-YR Rainfall=5.58" Printed 3/11/2021 Pond 10P: DRY POND Stage -Area -Storage Surface/Horizontal/Wetted Area (sq-ft) n snn 1 nnn 1 5nn 2 nnn 2 snn n nnn s 5nn a nnn a snn 5 nnn 22 6 5 4 3 1 0 y Custom Stage Data S 0 5,000 10,000 15,000 20.000 25,000 Storage (cubic -feet) Surface ❑ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Pond 10P: DRY POND Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.00 0 418.00 0.00 5.50 0.00 0 418.00 0.00 6.00 0.02 9 418.01 0.00 6.50 0.05 62 418.04 0.01 7.00 0.09 153 418.10 0.04 7.50 0.13 257 418.17 0.07 8.00 0.18 359 418.23 0.12 8.50 0.26 473 418.30 0.18 9.00 0.36 634 418.40 0.26 9.50 0.44 833 418.52 0.33 10.00 0.60 1,100 418.67 0.39 10.50 0.87 1,614 418.95 0.49 11.00 1.36 2,587 419.44 0.63 11.50 2.54 4,679 420.34 0.83 12.00 41.00 22,059 424.99 37.35 12.50 3.71 17,791 424.06 4.02 13.00 2.28 17,513 423.99 2.39 13.50 1.73 17,368 423.96 1.80 14.00 1.36 17,245 423.93 1.45 14.50 1.20 17,074 423.89 1.34 15.00 1.08 16,725 423.81 1.33 15.50 0.96 16,180 423.68 1.32 16.00 0.84 15,449 423.51 1.30 16.50 0.78 14,588 423.30 1.27 17.00 0.74 13,694 423.08 1.24 17.50 0.70 12,774 422.85 1.21 18.00 0.65 11,831 422.61 1.18 18.50 0.61 10,870 422.35 1.15 19.00 0.57 9,896 422.07 1.11 19.50 0.52 8,915 421.78 1.07 20.00 0.48 7,932 421.48 1.02 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 418.00 0.00 418.10 0.03 418.20 0.10 418.30 0.18 418.40 0.26 418.50 0.32 418.60 0.36 418.70 0.41 418.80 0.44 418.90 0.48 419.00 0.51 419.10 0.54 419.20 0.57 419.30 0.60 419.40 0.62 419.50 0.65 419.60 0.67 419.70 0.69 419.80 0.72 419.90 0.74 420.00 0.76 420.10 0.78 420.20 0.80 420.30 0.82 420.40 0.84 420.50 0.86 420.60 0.87 420.70 0.89 420.80 0.91 420.90 0.93 421.00 0.94 421.10 0.96 421.20 0.98 421.30 0.99 421.40 1.01 421.50 1.02 421.60 1.04 421.70 1.05 421.80 1.07 421.90 1.08 422.00 1.10 422.10 1.11 422.20 1.13 422.30 1.14 422.40 1.15 422.50 1.17 422.60 1.18 422.70 1.19 422.80 1.21 422.90 1.22 423.00 1.23 423.10 1.25 Type/1 24-hr 10-YR Rainfall=5.58" Stage -Discharge for Pond 10P: DRY POND Elevation Primary (feet) (cfs) 423.20 1.26 423.30 1.27 423.40 1.28 423.50 1.30 423.60 1.31 423.70 1.32 423.80 1.33 423.90 1.34 424.00 2.52 424.10 5.29 424.20 8.99 424.30 13.42 424.40 18.48 424.50 24.10 424.60 30.23 424.70 36.43 424.80 36.74 424.90 37.05 425.00 37.47 425.10 41.51 425.20 48.14 425.30 57.13 425.40 68.22 425.50 81.64 425.60 97.02 425.70 111.84 425.80 127.65 425.90 144.71 426.00 162.67 426.10 181.05 426.20 200.16 426.30 220.25 426.40 241.08 426.50 262.97 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Grc Type /l 24-hr 10-YR Rainfall=5.58" Stage -Area -Storage for Pond 10P: DRY POND Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 418.00 1,493 0 418.10 1,535 151 418.20 1,577 307 418.30 1,619 467 418.40 1,661 631 418.50 1,704 799 418.60 1,746 972 418.70 1,788 1,148 418.80 1,830 1,329 418.90 1,872 1,514 419.00 1,914 1,704 419.10 1,961 1,897 419.20 2,007 2,096 419.30 2,054 2,299 419.40 2,100 2,506 419.50 2,147 2,719 419.60 2,194 2,936 419.70 2,240 3,157 419.80 2,287 3,384 419.90 2,333 3,615 420.00 2,380 3,851 420.10 2,431 4,091 420.20 2,482 4,337 420.30 2,532 4,587 420.40 2,583 4,843 420.50 2,634 5,104 420.60 2,685 5,370 420.70 2,736 5,641 420.80 2,786 5,917 420.90 2,837 6,198 421.00 2,888 6,485 421.10 2,942 6,776 421.20 2,996 7,073 421.30 3,051 7,375 421.40 3,105 7,683 421.50 3,159 7,996 421.60 3,213 8,315 421.70 3,267 8,639 421.80 3,322 8,968 421.90 3,376 9,303 422.00 3,430 9,644 422.10 3,487 9,989 422.20 3,543 10,341 422.30 3,600 10,698 422.40 3,656 11,061 422.50 3,713 11,429 422.60 3,769 11,803 422.70 3,825 12,183 422.80 3,882 12,568 422.90 3,938 12,959 423.00 3,995 13,356 423.10 4,033 13,757 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.20 4,072 14,163 423.30 4,110 14,572 423.40 4,149 14,985 423.50 4,187 15,402 423.60 4,225 15,822 423.70 4,264 16,247 423.80 4,302 16,675 423.90 4,341 17,107 424.00 4,379 17,543 424.10 4,415 17,983 424.20 4,450 18,426 424.30 4,486 18,873 424.40 4,521 19,323 424.50 4,557 19,777 424.60 4,592 20,234 424.70 4,627 20,695 424.80 4,663 21,160 424.90 4,698 21,628 425.00 4,734 22,100 425.10 4,766 22,575 425.20 4,799 23,053 425.30 4,831 23,534 425.40 4,864 24,019 425.50 4,896 24,507 425.60 4,928 24,998 425.70 4,961 25,493 425.80 4,993 25,990 425.90 5,026 26,491 426.00 5,058 26,996 426.10 5,112 27,504 426.20 5,167 28,018 426.30 5,221 28,537 426.40 5,276 29,062 426.50 6,330 29,593 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Printed 3/11/2021 Summary for Link 3L: PRE Combined Inflow Area = 16.080 ac, 4.48% Impervious, Inflow Depth > 1.65" for 10-YR event Inflow = 50.48 cfs @ 11.98 hrs, Volume= 2.209 of Primary = 50.48 cfs @ 11.98 hrs, Volume= 2.209 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 3L: PRE Combined Hydrograph ■ h fim— ■ Primary Time (horns) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Link 3L: PRE Combined Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 5.25 0.00 0.00 0.00 5.50 0.00 0.00 0.00 5.75 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.25 0.00 0.00 0.00 6.50 0.00 0.00 0.00 6.75 0.00 0.00 0.00 7.00 0.00 0.00 0.00 7.25 0.00 0.00 0.00 7.50 0.00 0.00 0.00 7.75 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.25 0.00 0.00 0.00 8.50 0.00 0.00 0.00 8.75 0.00 0.00 0.00 9.00 0.01 0.00 0.01 9.25 0.02 0.00 0.02 9.50 0.02 0.00 0.02 9.75 0.03 0.00 0.03 10.00 0.04 0.00 0.04 10.25 0.06 0.00 0.06 10.50 0.07 0.00 0.07 10.75 0.10 0.00 0.10 11.00 0.15 0.00 0.15 11.25 0.43 0.00 0.43 11.50 0.95 0.00 0.95 11.75 8.45 0.00 8.45 12.00 48.97 0.00 48.97 12.25 7.80 0.00 7.80 12.50 5.21 0.00 5.21 12.75 3.89 0.00 3.89 13.00 3.31 0.00 3.31 13.25 2.89 0.00 2.89 13.50 2.56 0.00 2.56 13.75 2.29 0.00 2.29 14.00 2.04 0.00 2.04 14.25 1.90 0.00 1.90 14.50 1.82 0.00 1.82 14.75 1.74 0.00 1.74 15.00 1.66 0.00 1.66 15.25 1.57 0.00 1.57 15.50 1.48 0.00 1.48 15.75 1.40 0.00 1.40 16.00 1.30 0.00 1.30 16.25 1.25 0.00 1.25 16.50 1.22 0.00 1.22 16.75 1.19 0.00 1.19 17.00 1.16 0.00 1.16 17.25 1.13 0.00 1.13 17.50 1.10 0.00 1.10 17.75 1.07 0.00 1.07 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 18.00 1.04 0.00 1.04 18.25 1.00 0.00 1.00 18.50 0.97 0.00 0.97 18.75 0.94 0.00 0.94 19.00 0.90 0.00 0.90 19.25 0.87 0.00 0.87 19.50 0.84 0.00 0.84 19.75 0.80 0.00 0.80 20.00 0.77 0.00 0.77 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Printed 3/11/2021 Summary for Link 13L: POST Combined Inflow Area = 16.220 ac, 55.49% Impervious, Inflow Depth > 2.82" for 10-YR event Inflow = 88.46 cfs @ 11.99 hrs, Volume= 3.817 of Primary = 88.46 cfs @ 11.99 hrs, Volume= 3.817 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 13L: POST Combined Hydrograph ■ hifim— ■ Primary Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type/1 24-hr 10-YR Rainfall=5.58" Hydrograph for Link 13L: POST Combined Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 5.25 0.00 0.00 0.00 5.50 0.00 0.00 0.00 5.75 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.25 0.01 0.00 0.01 6.50 0.02 0.00 0.02 6.75 0.03 0.00 0.03 7.00 0.04 0.00 0.04 7.25 0.06 0.00 0.06 7.50 0.09 0.00 0.09 7.75 0.11 0.00 0.11 8.00 0.14 0.00 0.14 8.25 0.17 0.00 0.17 8.50 0.21 0.00 0.21 8.75 0.25 0.00 0.25 9.00 0.30 0.00 0.30 9.25 0.34 0.00 0.34 9.50 0.37 0.00 0.37 9.75 0.41 0.00 0.41 10.00 0.46 0.00 0.46 10.25 0.52 0.00 0.52 10.50 0.60 0.00 0.60 10.75 0.69 0.00 0.69 11.00 0.81 0.00 0.81 11.25 0.96 0.00 0.96 11.50 1.18 0.00 1.18 11.75 3.01 0.00 3.01 12.00 88.11 0.00 88.11 12.25 14.27 0.00 14.27 12.50 9.01 0.00 9.01 12.75 6.33 0.00 6.33 13.00 5.33 0.00 5.33 13.25 4.56 0.00 4.56 13.50 4.02 0.00 4.02 13.75 3.56 0.00 3.56 14.00 3.22 0.00 3.22 14.25 2.96 0.00 2.96 14.50 2.87 0.00 2.87 14.75 2.80 0.00 2.80 15.00 2.72 0.00 2.72 15.25 2.63 0.00 2.63 15.50 2.55 0.00 2.55 15.75 2.46 0.00 2.46 16.00 2.38 0.00 2.38 16.25 2.31 0.00 2.31 16.50 2.26 0.00 2.26 16.75 2.22 0.00 2.22 17.00 2.18 0.00 2.18 17.25 2.14 0.00 2.14 17.50 2.10 0.00 2.10 17.75 2.06 0.00 2.06 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 18.00 2.01 0.00 2.01 18.25 1.97 0.00 1.97 18.50 1.92 0.00 1.92 18.75 1.88 0.00 1.88 19.00 1.83 0.00 1.83 19.25 1.78 0.00 1.78 19.50 1.73 0.00 1.73 19.75 1.68 0.00 1.68 20.00 1.63 0.00 1.63 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Printed 3/11/2021 Summary for Subcatchment 1S: PRE Onsite Runoff = 109.22 cfs @ 11.97 hrs, Volume= 4.849 af, Depth> 4.00" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN Description 0.210 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 14.350 60 Woods, Fair, HSG B 14.560 61 Weighted Average 14.350 98.56% Pervious Area 0.210 1.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: PRE Onsite Hydrograph � wwww wwwwww wwwww wwwww wwwww wwwww wwwww I® wwwwwww w■ L77i" I wt,1I 1 M wI111111ii�ww � t • - >i . I r:�■ 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ■ Rurwff 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 1S: PRE Onsite Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.00 0.00 5.25 0.61 0.00 0.00 5.50 0.65 0.00 0.00 5.75 0.69 0.00 0.00 6.00 0.73 0.00 0.00 6.25 0.77 0.00 0.00 6.50 0.82 0.00 0.00 6.75 0.86 0.00 0.00 7.00 0.91 0.00 0.00 7.25 0.95 0.00 0.00 7.50 1.00 0.00 0.00 7.75 1.05 0.00 0.00 8.00 1.10 0.00 0.00 8.25 1.15 0.00 0.00 8.50 1.21 0.00 0.00 8.75 1.28 0.00 0.00 9.00 1.35 0.00 0.05 9.25 1.42 0.00 0.15 9.50 1.49 0.01 0.24 9.75 1.57 0.01 0.36 10.00 1.66 0.02 0.52 10.25 1.76 0.03 0.73 10.50 1.87 0.05 1.01 10.75 2.00 0.07 1.42 11.00 2.15 0.11 1.96 11.25 2.34 0.15 2.93 11.50 2.59 0.22 4.40 11.75 3.54 0.59 26.06 12.00 6.07 2.05 105.17 12.25 6.47 2.32 15.58 12.50 6.73 2.51 10.24 12.75 6.92 2.64 7.58 13.00 7.07 2.75 6.39 13.25 7.20 2.85 5.55 13.50 7.32 2.93 4.89 13.75 7.42 3.01 4.35 14.00 7.51 3.08 3.88 14.25 7.59 3.14 3.60 14.50 7.67 3.20 3.44 14.75 7.75 3.25 3.28 15.00 7.82 3.31 3.11 15.25 7.88 3.36 2.94 15.50 7.95 3.40 2.77 15.75 8.01 3.45 2.60 16.00 8.06 3.49 2.43 16.25 8.11 3.53 2.33 16.50 8.16 3.57 2.27 16.75 8.21 3.61 2.21 17.00 8.26 3.64 2.15 17.25 8.31 3.68 2.09 17.50 8.35 3.71 2.03 17.75 8.39 3.75 1.97 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 3.78 1.90 18.25 8.48 3.81 1.84 18.50 8.52 3.84 1.78 18.75 8.55 3.87 1.72 19.00 8.59 3.90 1.65 19.25 8.62 3.93 1.59 19.50 8.66 3.95 1.53 19.75 8.69 3.98 1.46 20.00 8.72 4.00 1.40 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Summary for Subcatchment 2S: Pre Offsite Runoff = 14.99 cfs @ 11.97 hrs, Volume= 0.690 af, Depth> 5.45" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN 0.510 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 1.010 60 Woods, Fair, HSG B 1.520 73 Weighted Average 1.010 66.45% Pervious Area 0.510 33.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Pre Offsite Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 2S: Pre Mite Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.00 0.00 5.25 0.61 0.00 0.00 5.50 0.65 0.00 0.00 5.75 0.69 0.00 0.00 6.00 0.73 0.00 0.00 6.25 0.77 0.00 0.00 6.50 0.82 0.00 0.01 6.75 0.86 0.00 0.01 7.00 0.91 0.01 0.02 7.25 0.95 0.01 0.03 7.50 1.00 0.02 0.03 7.75 1.05 0.02 0.04 8.00 1.10 0.03 0.05 8.25 1.15 0.04 0.06 8.50 1.21 0.05 0.08 8.75 1.28 0.07 0.09 9.00 1.35 0.09 0.11 9.25 1.42 0.11 0.12 9.50 1.49 0.13 0.14 9.75 1.57 0.15 0.16 10.00 1.66 0.18 0.19 10.25 1.76 0.22 0.23 10.50 1.87 0.26 0.28 10.75 2.00 0.32 0.35 11.00 2.15 0.39 0.45 11.25 2.34 0.49 0.61 11.50 2.59 0.62 0.84 11.75 3.54 1.21 4.33 12.00 6.07 3.15 14.17 12.25 6.47 3.48 1.99 12.50 6.73 3.71 1.29 12.75 6.92 3.86 0.95 13.00 7.07 4.00 0.80 13.25 7.20 4.11 0.69 13.50 7.32 4.21 0.61 13.75 7.42 4.30 0.54 14.00 7.51 4.38 0.48 14.25 7.59 4.45 0.44 14.50 7.67 4.52 0.42 14.75 7.75 4.59 0.40 15.00 7.82 4.65 0.38 15.25 7.88 4.71 0.36 15.50 7.95 4.76 0.34 15.75 8.01 4.82 0.32 16.00 8.06 4.86 0.29 16.25 8.11 4.91 0.28 16.50 8.16 4.95 0.27 16.75 8.21 5.00 0.27 17.00 8.26 5.04 0.26 17.25 8.31 5.08 0.25 17.50 8.35 5.12 0.24 17.75 8.39 5.16 0.24 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 5.20 0.23 18.25 8.48 5.23 0.22 18.50 8.52 5.27 0.21 18.75 8.55 5.30 0.21 19.00 8.59 5.34 0.20 19.25 8.62 5.37 0.19 19.50 8.66 5.40 0.18 19.75 8.69 5.43 0.17 20.00 8.72 5.45 0.17 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Printed 3/11/2021 Summary for Subcatchment 4S: Onsite To Bioretention 1 Runoff = 49.60 cfs @ 11.96 hrs, Volume= 2.399 af, Depth> 6.65" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN Description 2.640 98 Paved parking, HSG B 1.430 61 >75% Grass cover, Good, HSG B 0.260 60 Woods, Fair, HSG B 4.330 83 Weighted Average 1.690 39.03% Pervious Area 2.640 60.97% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 55 50 45 40 35 N � 30 3 LL 25 20 15 10 j 0 Subcatchment 4S: Onsite To Bioretention 1 Hydrograph Time (hours) ■ Rurwff 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 4S: Onsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.01 0.09 5.25 0.61 0.02 0.11 5.50 0.65 0.03 0.13 5.75 0.69 0.03 0.15 6.00 0.73 0.04 0.17 6.25 0.77 0.06 0.20 6.50 0.82 0.07 0.22 6.75 0.86 0.08 0.25 7.00 0.91 0.10 0.27 7.25 0.95 0.11 0.30 7.50 1.00 0.13 0.32 7.75 1.05 0.15 0.35 8.00 1.10 0.17 0.38 8.25 1.15 0.20 0.43 8.50 1.21 0.23 0.50 8.75 1.28 0.26 0.57 9.00 1.35 0.29 0.65 9.25 1.42 0.33 0.70 9.50 1.49 0.37 0.72 9.75 1.57 0.42 0.81 10.00 1.66 0.47 0.93 10.25 1.76 0.53 1.10 10.50 1.87 0.61 1.29 10.75 2.00 0.69 1.57 11.00 2.15 0.80 1.91 11.25 2.34 0.94 2.53 11.50 2.59 1.13 3.35 11.75 3.54 1.90 16.01 12.00 6.07 4.16 46.27 12.25 6.47 4.53 6.30 12.50 6.73 4.78 4.06 12.75 6.92 4.95 2.97 13.00 7.07 5.10 2.49 13.25 7.20 5.22 2.14 13.50 7.32 5.33 1.88 13.75 7.42 5.43 1.66 14.00 7.51 5.51 1.48 14.25 7.59 5.59 1.36 14.50 7.67 5.67 1.30 14.75 7.75 5.74 1.23 15.00 7.82 5.80 1.17 15.25 7.88 5.87 1.10 15.50 7.95 5.93 1.04 15.75 8.01 5.98 0.97 16.00 8.06 6.04 0.90 16.25 8.11 6.09 0.86 16.50 8.16 6.13 0.84 16.75 8.21 6.18 0.82 17.00 8.26 6.23 0.79 17.25 8.31 6.27 0.77 17.50 8.35 6.31 0.75 17.75 8.39 6.35 0.72 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 6.39 0.70 18.25 8.48 6.43 0.68 18.50 8.52 6.47 0.65 18.75 8.55 6.51 0.63 19.00 8.59 6.54 0.60 19.25 8.62 6.58 0.58 19.50 8.66 6.61 0.56 19.75 8.69 6.64 0.53 20.00 8.72 6.67 0.51 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Summary for Subcatchment 5S: Mite To Bioretention 1 Runoff = 14.99 cfs @ 11.97 hrs, Volume= 0.690 af, Depth> 5.45" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN 0.510 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 1.010 60 Woods, Fair, HSG B 1.520 73 Weighted Average 1.010 66.45% Pervious Area 0.510 33.55% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Mite To Bioretention 1 Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 5S: Offsite To Bioretention 1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.00 0.00 5.25 0.61 0.00 0.00 5.50 0.65 0.00 0.00 5.75 0.69 0.00 0.00 6.00 0.73 0.00 0.00 6.25 0.77 0.00 0.00 6.50 0.82 0.00 0.01 6.75 0.86 0.00 0.01 7.00 0.91 0.01 0.02 7.25 0.95 0.01 0.03 7.50 1.00 0.02 0.03 7.75 1.05 0.02 0.04 8.00 1.10 0.03 0.05 8.25 1.15 0.04 0.06 8.50 1.21 0.05 0.08 8.75 1.28 0.07 0.09 9.00 1.35 0.09 0.11 9.25 1.42 0.11 0.12 9.50 1.49 0.13 0.14 9.75 1.57 0.15 0.16 10.00 1.66 0.18 0.19 10.25 1.76 0.22 0.23 10.50 1.87 0.26 0.28 10.75 2.00 0.32 0.35 11.00 2.15 0.39 0.45 11.25 2.34 0.49 0.61 11.50 2.59 0.62 0.84 11.75 3.54 1.21 4.33 12.00 6.07 3.15 14.17 12.25 6.47 3.48 1.99 12.50 6.73 3.71 1.29 12.75 6.92 3.86 0.95 13.00 7.07 4.00 0.80 13.25 7.20 4.11 0.69 13.50 7.32 4.21 0.61 13.75 7.42 4.30 0.54 14.00 7.51 4.38 0.48 14.25 7.59 4.45 0.44 14.50 7.67 4.52 0.42 14.75 7.75 4.59 0.40 15.00 7.82 4.65 0.38 15.25 7.88 4.71 0.36 15.50 7.95 4.76 0.34 15.75 8.01 4.82 0.32 16.00 8.06 4.86 0.29 16.25 8.11 4.91 0.28 16.50 8.16 4.95 0.27 16.75 8.21 5.00 0.27 17.00 8.26 5.04 0.26 17.25 8.31 5.08 0.25 17.50 8.35 5.12 0.24 17.75 8.39 5.16 0.24 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 5.20 0.23 18.25 8.48 5.23 0.22 18.50 8.52 5.27 0.21 18.75 8.55 5.30 0.21 19.00 8.59 5.34 0.20 19.25 8.62 5.37 0.19 19.50 8.66 5.40 0.18 19.75 8.69 5.43 0.17 20.00 8.72 5.45 0.17 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Printed 3/11/2021 Summary for Subcatchment 7S: To Bioretention 2 Runoff = 21.45 cfs @ 11.97 hrs, Volume= 1.026 af, Depth> 6.41" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN Description 1.040 98 Paved parking, HSG B 0.840 61 >75% Grass cover, Good, HSG B 0.040 60 Woods, Fair, HSG B 1.920 81 Weighted Average 0.880 45.83% Pervious Area 1.040 54.17% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: To Bioretention 2 Hydrograph 24 23 _.._ _ _ ■ Rurwff 22 21 21 45 dl Type II 24-hr 29 19 - 100-YR Rainfall=9.16" 18 17 + Runoff Area=1.920 ac 16 15 '' -- - Runoff Volume=1.026 of .13 Runoff Depth>6.41" 3 12 211 Tc=6.0 min 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 7S: To Bioretention 2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.00 0.02 5.25 0.61 0.01 0.03 5.50 0.65 0.01 0.04 5.75 0.69 0.02 0.05 6.00 0.73 0.03 0.06 6.25 0.77 0.04 0.07 6.50 0.82 0.05 0.08 6.75 0.86 0.06 0.09 7.00 0.91 0.07 0.10 7.25 0.95 0.08 0.11 7.50 1.00 0.10 0.12 7.75 1.05 0.12 0.13 8.00 1.10 0.13 0.14 8.25 1.15 0.15 0.16 8.50 1.21 0.18 0.19 8.75 1.28 0.21 0.22 9.00 1.35 0.24 0.25 9.25 1.42 0.27 0.28 9.50 1.49 0.31 0.29 9.75 1.57 0.35 0.32 10.00 1.66 0.40 0.38 10.25 1.76 0.46 0.45 10.50 1.87 0.52 0.53 10.75 2.00 0.60 0.65 11.00 2.15 0.70 0.79 11.25 2.34 0.83 1.05 11.50 2.59 1.01 1.40 11.75 3.54 1.74 6.79 12.00 6.07 3.95 20.06 12.25 6.47 4.31 2.75 12.50 6.73 4.56 1.77 12.75 6.92 4.73 1.30 13.00 7.07 4.87 1.09 13.25 7.20 4.99 0.94 13.50 7.32 5.10 0.82 13.75 7.42 5.20 0.73 14.00 7.51 5.28 0.65 14.25 7.59 5.36 0.60 14.50 7.67 5.43 0.57 14.75 7.75 5.50 0.54 15.00 7.82 5.57 0.51 15.25 7.88 5.63 0.48 15.50 7.95 5.69 0.45 15.75 8.01 5.75 0.42 16.00 8.06 5.80 0.40 16.25 8.11 5.85 0.38 16.50 8.16 5.90 0.37 16.75 8.21 5.94 0.36 17.00 8.26 5.99 0.35 17.25 8.31 6.03 0.34 17.50 8.35 6.07 0.33 17.75 8.39 6.12 0.32 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 6.16 0.31 18.25 8.48 6.19 0.30 18.50 8.52 6.23 0.29 18.75 8.55 6.27 0.28 19.00 8.59 6.30 0.26 19.25 8.62 6.33 0.25 19.50 8.66 6.37 0.24 19.75 8.69 6.40 0.23 20.00 8.72 6.42 0.22 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Printed 3/11/2021 Summary for Subcatchment 9S: To Dry Pond Runoff = 80.29 cfs @ 11.96 hrs, Volume= 3.884 af, Depth> 6.65" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN Description 4.240 98 Paved parking, HSG B 2.770 61 >75% Grass cover, Good, HSG B 0.000 60 Woods, Fair, HSG B 7.010 83 Weighted Average 2.770 39.51 % Pervious Area 4.240 60.49% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 85 80 75 70 65 60 55 w 50 V 3 45 LL 40 35 30 25 20 15 10 5 0 Subcatchment 9S: To Dry Pond Hydrograph Time (hours) ■ Runoff 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 9S: To Dry Pond Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.01 0.14 5.25 0.61 0.02 0.17 5.50 0.65 0.03 0.21 5.75 0.69 0.03 0.24 6.00 0.73 0.04 0.28 6.25 0.77 0.06 0.32 6.50 0.82 0.07 0.36 6.75 0.86 0.08 0.40 7.00 0.91 0.10 0.44 7.25 0.95 0.11 0.48 7.50 1.00 0.13 0.53 7.75 1.05 0.15 0.57 8.00 1.10 0.17 0.61 8.25 1.15 0.20 0.69 8.50 1.21 0.23 0.80 8.75 1.28 0.26 0.92 9.00 1.35 0.29 1.05 9.25 1.42 0.33 1.13 9.50 1.49 0.37 1.17 9.75 1.57 0.42 1.31 10.00 1.66 0.47 1.51 10.25 1.76 0.53 1.78 10.50 1.87 0.61 2.10 10.75 2.00 0.69 2.54 11.00 2.15 0.80 3.09 11.25 2.34 0.94 4.09 11.50 2.59 1.13 5.43 11.75 3.54 1.90 25.92 12.00 6.07 4.16 74.91 12.25 6.47 4.53 10.20 12.50 6.73 4.78 6.57 12.75 6.92 4.95 4.81 13.00 7.07 5.10 4.02 13.25 7.20 5.22 3.47 13.50 7.32 5.33 3.04 13.75 7.42 5.43 2.69 14.00 7.51 5.51 2.39 14.25 7.59 5.59 2.21 14.50 7.67 5.67 2.10 14.75 7.75 5.74 2.00 15.00 7.82 5.80 1.89 15.25 7.88 5.87 1.78 15.50 7.95 5.93 1.68 15.75 8.01 5.98 1.57 16.00 8.06 6.04 1.46 16.25 8.11 6.09 1.40 16.50 8.16 6.13 1.36 16.75 8.21 6.18 1.32 17.00 8.26 6.23 1.28 17.25 8.31 6.27 1.25 17.50 8.35 6.31 1.21 17.75 8.39 6.35 1.17 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 6.39 1.13 18.25 8.48 6.43 1.09 18.50 8.52 6.47 1.05 18.75 8.55 6.51 1.02 19.00 8.59 6.54 0.98 19.25 8.62 6.58 0.94 19.50 8.66 6.61 0.90 19.75 8.69 6.64 0.86 20.00 8.72 6.67 0.82 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Summary for Subcatchment 11S: Onsite Unrouted 4 Runoff = 5.50 cfs @ 11.97 hrs, Volume= 0.248 af, Depth> 4.72" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN 0.110 98 Paved parking, HSG B 0.380 61 >75% Grass cover, Good, HSG B 0.140 60 Woods, Fair, HSG B 0.630 67 Weighted Average 0.520 82.54% Pervious Area 0.110 17.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: Onsite Unrouted 4 Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 11S: Onsite Unrouted 4 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.00 0.00 5.25 0.61 0.00 0.00 5.50 0.65 0.00 0.00 5.75 0.69 0.00 0.00 6.00 0.73 0.00 0.00 6.25 0.77 0.00 0.00 6.50 0.82 0.00 0.00 6.75 0.86 0.00 0.00 7.00 0.91 0.00 0.00 7.25 0.95 0.00 0.00 7.50 1.00 0.00 0.00 7.75 1.05 0.00 0.00 8.00 1.10 0.00 0.00 8.25 1.15 0.01 0.01 8.50 1.21 0.01 0.01 8.75 1.28 0.02 0.02 9.00 1.35 0.02 0.02 9.25 1.42 0.04 0.03 9.50 1.49 0.05 0.03 9.75 1.57 0.06 0.04 10.00 1.66 0.08 0.05 10.25 1.76 0.10 0.06 10.50 1.87 0.13 0.08 10.75 2.00 0.17 0.10 11.00 2.15 0.22 0.13 11.25 2.34 0.29 0.19 11.50 2.59 0.40 0.27 11.75 3.54 0.88 1.46 12.00 6.07 2.59 5.24 12.25 6.47 2.89 0.76 12.50 6.73 3.10 0.49 12.75 6.92 3.24 0.36 13.00 7.07 3.36 0.31 13.25 7.20 3.47 0.26 13.50 7.32 3.56 0.23 13.75 7.42 3.65 0.21 14.00 7.51 3.72 0.18 14.25 7.59 3.79 0.17 14.50 7.67 3.85 0.16 14.75 7.75 3.91 0.15 15.00 7.82 3.97 0.15 15.25 7.88 4.03 0.14 15.50 7.95 4.08 0.13 15.75 8.01 4.13 0.12 16.00 8.06 4.17 0.11 16.25 8.11 4.22 0.11 16.50 8.16 4.26 0.11 16.75 8.21 4.30 0.10 17.00 8.26 4.34 0.10 17.25 8.31 4.38 0.10 17.50 8.35 4.41 0.10 17.75 8.39 4.45 0.09 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 4.49 0.09 18.25 8.48 4.52 0.09 18.50 8.52 4.55 0.08 18.75 8.55 4.58 0.08 19.00 8.59 4.62 0.08 19.25 8.62 4.64 0.07 19.50 8.66 4.67 0.07 19.75 8.69 4.70 0.07 20.00 8.72 4.73 0.07 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Summary for Subcatchment 12S: Onsite Unrouted 5 Runoff = 9.17 cfs @ 11.96 hrs, Volume= 0.441 af, Depth> 6.53" Printed 3/11/2021 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-YR Rainfall=9.16" Area (ac) CN 0.460 98 Paved parking, HSG B 0.310 61 >75% Grass cover, Good, HSG B 0.040 60 Woods, Fair, HSG B 0.810 82 Weighted Average 0.350 43.21 % Pervious Area 0.460 56.79% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 12S: Onsite Unrouted 5 Hydrograph ■ Rurwff Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Subcatchment 12S: Onsite Unrouted 5 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 5.00 0.58 0.01 0.01 5.25 0.61 0.01 0.02 5.50 0.65 0.02 0.02 5.75 0.69 0.03 0.02 6.00 0.73 0.03 0.03 6.25 0.77 0.04 0.03 6.50 0.82 0.06 0.04 6.75 0.86 0.07 0.04 7.00 0.91 0.08 0.05 7.25 0.95 0.10 0.05 7.50 1.00 0.11 0.06 7.75 1.05 0.13 0.06 8.00 1.10 0.15 0.07 8.25 1.15 0.17 0.07 8.50 1.21 0.20 0.09 8.75 1.28 0.23 0.10 9.00 1.35 0.27 0.11 9.25 1.42 0.30 0.12 9.50 1.49 0.34 0.13 9.75 1.57 0.39 0.14 10.00 1.66 0.44 0.17 10.25 1.76 0.49 0.20 10.50 1.87 0.56 0.23 10.75 2.00 0.65 0.28 11.00 2.15 0.75 0.34 11.25 2.34 0.89 0.46 11.50 2.59 1.07 0.61 11.75 3.54 1.82 2.93 12.00 6.07 4.05 8.56 12.25 6.47 4.42 1.17 12.50 6.73 4.67 0.75 12.75 6.92 4.84 0.55 13.00 7.07 4.98 0.46 13.25 7.20 5.11 0.40 13.50 7.32 5.22 0.35 13.75 7.42 5.31 0.31 14.00 7.51 5.40 0.27 14.25 7.59 5.48 0.25 14.50 7.67 5.55 0.24 14.75 7.75 5.62 0.23 15.00 7.82 5.69 0.22 15.25 7.88 5.75 0.20 15.50 7.95 5.81 0.19 15.75 8.01 5.87 0.18 16.00 8.06 5.92 0.17 16.25 8.11 5.97 0.16 16.50 8.16 6.01 0.16 16.75 8.21 6.06 0.15 17.00 8.26 6.11 0.15 17.25 8.31 6.15 0.14 17.50 8.35 6.19 0.14 17.75 8.39 6.23 0.13 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 18.00 8.44 6.27 0.13 18.25 8.48 6.31 0.13 18.50 8.52 6.35 0.12 18.75 8.55 6.39 0.12 19.00 8.59 6.42 0.11 19.25 8.62 6.45 0.11 19.50 8.66 6.49 0.10 19.75 8.69 6.52 0.10 20.00 8.72 6.55 0.09 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Summary for Pond 6P: BIORETENTION 1 [82] Warning: Early inflow requires earlier time span Printed 3/11/2021 Inflow Area = 5.850 ac, 53.85% Impervious, Inflow Depth > 6.34" for 100-YR event Inflow = 64.58 cfs @ 11.97 hrs, Volume= 3.089 of Outflow = 63.63 cfs @ 11.99 hrs, Volume= 2.775 af, Atten= 1 %, Lag= 1.2 min Primary = 63.63 cfs @ 11.99 hrs, Volume= 2.775 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 416.09' @ 11.98 hrs Surf.Area= 6,732 sf Storage= 19,949 cf Plug -Flow detention time= 59.9 min calculated for 2.775 of (90% of inflow) Center -of -Mass det. time= 24.8 min ( 782.8 - 758.0 ) Volume Invert Avail.Storage Storage Description #1 407.00' 30,851 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 407.00 3,808 0.0 0 0 411.00 3,808 40.0 6,093 6,093 414.00 3,808 25.0 2,856 8,949 415.00 5,174 100.0 4,491 13,440 416.00 6,596 100.0 5,885 19,325 417.50 8,772 100.0 11,526 30,851 Device Routing Invert Outlet Devices #1 Primary 409.71' 36.0" Round HDPE_Round 36" L= 47.6' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 409.71' / 409.00' S= 0.0149 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 7.07 sf #2 Device 1 415.00' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 415.85' 15.0' long x 1.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32 Primary OutFlow Max=61.42 cfs @ 11.99 hrs HW=416.07' (Free Discharge) 11=HDPE Round 36" (Passes 57.14 cfs of 75.06 cfs potential flow) t2=Orifice/Grate (Weir Controls 57.14 cfs @ 3.39 fps) 3=Broad-Crested Rectangular Weir (Weir Controls 4.27 cfs @ 1.27 fps) 2021-03-11 Full Routing Prepared by Timmons Gro W Type II 24-hr 100-YR Rainfall=9.16" Printed 3/11/2021 Pond 6P: BIORETENTION 1 Hydrograph 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 6P: BIORETENTION 1 Stage -Discharge Discharge ids) ❑ Inflow ❑ Primary ❑ Primary 2021-03-11 Full Routing Prepared by Timmons Grc Type 11 24-hr 100-YR Rainfall=9.16" Pond 6P: BIORETENTION 1 Stage -Area -Storage Storage (cubic -feet) Printed 3/11/2021 ■ Surface ■ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Pond 6P: BIORETENTION 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.09 8 407.01 0.00 5.50 0.13 200 407.13 0.00 6.00 0.17 471 407.31 0.00 6.50 0.23 833 407.55 0.00 7.00 0.29 1,305 407.86 0.00 7.50 0.36 1,892 408.24 0.00 8.00 0.43 2,600 408.71 0.00 8.50 0.57 3,484 409.29 0.00 9.00 0.76 4,675 410.07 0.00 9.50 0.86 6,145 411.05 0.00 10.00 1.12 7,894 412.89 0.00 10.50 1.58 10,297 414.33 0.00 11.00 2.35 13,713 415.05 0.78 11.50 4.20 14,394 415.18 3.97 12.00 60.44 19,890 416.08 62.75 12.50 5.35 14,675 415.23 5.81 13.00 3.28 14,290 415.16 3.42 13.50 2.48 14,128 415.13 2.56 14.00 1.95 14,023 415.11 2.00 14.50 1.72 13,973 415.10 1.74 15.00 1.55 13,940 415.10 1.57 15.50 1.37 13,907 415.09 1.39 16.00 1.20 13,869 415.08 1.23 16.50 1.11 13,834 415.08 1.13 17.00 1.05 13,812 415.07 1.06 17.50 0.99 13,790 415.07 1.00 18.00 0.93 13,768 415.06 0.94 18.50 0.86 13,746 415.06 0.88 19.00 0.80 13,724 415.05 0.81 19.50 0.74 13,702 415.05 0.75 20.00 0.68 13,680 415.05 0.69 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 407.00 0.00 407.06 0.00 407.12 0.00 407.18 0.00 407.24 0.00 407.30 0.00 407.36 0.00 407.42 0.00 407.48 0.00 407.54 0.00 407.60 0.00 407.66 0.00 407.72 0.00 407.78 0.00 407.84 0.00 407.90 0.00 407.96 0.00 408.02 0.00 408.08 0.00 408.14 0.00 408.20 0.00 408.26 0.00 408.32 0.00 408.38 0.00 408.44 0.00 408.50 0.00 408.56 0.00 408.62 0.00 408.68 0.00 408.74 0.00 408.80 0.00 408.86 0.00 408.92 0.00 408.98 0.00 409.04 0.00 409.10 0.00 409.16 0.00 409.22 0.00 409.28 0.00 409.34 0.00 409.40 0.00 409.46 0.00 409.52 0.00 409.58 0.00 409.64 0.00 409.70 0.00 409.76 0.00 409.82 0.00 409.88 0.00 409.94 0.00 410.00 0.00 410.06 0.00 Type II 24-hr 100-YR Rainfall=9.16" Stage -Discharge for Pond 6P: BIORETENTION 1 Elevation Primary (feet) (cfs) 410.12 0.00 410.18 0.00 410.24 0.00 410.30 0.00 410.36 0.00 410.42 0.00 410.48 0.00 410.54 0.00 410.60 0.00 410.66 0.00 410.72 0.00 410.78 0.00 410.84 0.00 410.90 0.00 410.96 0.00 411.02 0.00 411.08 0.00 411.14 0.00 411.20 0.00 411.26 0.00 411.32 0.00 411.38 0.00 411.44 0.00 411.50 0.00 411.56 0.00 411.62 0.00 411.68 0.00 411.74 0.00 411.80 0.00 411.86 0.00 411.92 0.00 411.98 0.00 412.04 0.00 412.10 0.00 412.16 0.00 412.22 0.00 412.28 0.00 412.34 0.00 412.40 0.00 412.46 0.00 412.52 0.00 412.58 0.00 412.64 0.00 412.70 0.00 412.76 0.00 412.82 0.00 412.88 0.00 412.94 0.00 413.00 0.00 413.06 0.00 413.12 0.00 413.18 0.00 Elevation Primary (feet) (cfs) 413.24 0.00 413.30 0.00 413.36 0.00 413.42 0.00 413.48 0.00 413.54 0.00 413.60 0.00 413.66 0.00 413.72 0.00 413.78 0.00 413.84 0.00 413.90 0.00 413.96 0.00 414.02 0.00 414.08 0.00 414.14 0.00 414.20 0.00 414.26 0.00 414.32 0.00 414.38 0.00 414.44 0.00 414.50 0.00 414.56 0.00 414.62 0.00 414.68 0.00 414.74 0.00 414.80 0.00 414.86 0.00 414.92 0.00 414.98 0.00 415.04 0.41 415.10 1.62 415.16 3.29 415.22 5.30 415.28 7.61 415.34 10.18 415.40 12.99 415.46 16.03 415.52 19.26 415.58 22.69 415.64 26.30 415.70 30.08 415.76 34.03 415.82 38.14 415.88 42.61 415.94 47.90 416.00 53.71 416.06 59.94 416.12 66.57 416.18 73.54 416.24 80.86 416.30 88.48 Printed 3/11/2021 Elevation Primary (feet) (cfs) 416.36 92.19 416.42 95.41 416.48 98.87 416.54 102.61 416.60 106.54 416.66 110.69 416.72 115.14 416.78 119.80 416.84 124.69 416.90 129.68 416.96 134.85 417.02 140.22 417.08 145.85 417.14 151.76 417.20 157.88 417.26 164.18 417.32 170.43 417.38 176.86 417.44 183.47 417.50 189.88 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Stage -Area -Storage for Pond 6P: BIORETENTION 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 407.00 3,808 0 407.15 3,808 228 407.30 3,808 457 407.45 3,808 685 407.60 3,808 914 407.75 3,808 1,142 407.90 3,808 1,371 408.05 3,808 1,599 408.20 3,808 1,828 408.35 3,808 2,056 408.50 3,808 2,285 408.65 3,808 2,513 408.80 3,808 2,742 408.95 3,808 2,970 409.10 3,808 3,199 409.25 3,808 3,427 409.40 3,808 3,656 409.55 3,808 3,884 409.70 3,808 4,113 409.85 3,808 4,341 410.00 3,808 4,570 410.15 3,808 4,798 410.30 3,808 5,027 410.45 3,808 5,255 410.60 3,808 5,484 410.75 3,808 5,712 410.90 3,808 5,940 411.05 3,808 6,140 411.20 3,808 6,283 411.35 3,808 6,426 411.50 3,808 6,569 411.65 3,808 6,712 411.80 3,808 6,854 411.95 3,808 6,997 412.10 3,808 7,140 412.25 3,808 7,283 412.40 3,808 7,426 412.55 3,808 7,568 412.70 3,808 7,711 412.85 3,808 7,854 413.00 3,808 7,997 413.15 3,808 8,140 413.30 3,808 8,282 413.45 3,808 8,425 413.60 3,808 8,568 413.75 3,808 8,711 413.90 3,808 8,854 414.05 3,876 9,141 414.20 4,081 9,738 414.35 4,286 10,365 414.50 4,491 11,024 414.65 4,696 11,713 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 414.80 4,901 12,432 414.95 5,106 13,183 415.10 5,316 13,964 415.25 5,530 14,778 415.40 5,743 15,623 415.55 5,956 16,501 415.70 6,169 17,410 415.85 6,383 18,351 416.00 6,596 19,325 416.15 6,814 20,331 416.30 7,031 21,369 416.45 7,249 22,440 416.60 7,466 23,544 416.75 7,684 24,680 416.90 7,902 25,849 417.05 8,119 27,050 417.20 8,337 28,284 417.35 8,554 29,551 417.50 8,772 30,851 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Summary for Pond 8P: BIORETENTION 2 Printed 3/11/2021 Inflow Area = 1.920 ac, 54.17% Impervious, Inflow Depth > 6.41" for 100-YR event Inflow = 21.45 cfs @ 11.97 hrs, Volume= 1.026 of Outflow = 21.20 cfs @ 11.98 hrs, Volume= 0.898 af, Atten= 1 %, Lag= 1.1 min Primary = 21.20 cfs @ 11.98 hrs, Volume= 0.898 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 432.69' @ 11.98 hrs Surf.Area= 2,254 sf Storage= 7,189 cf Plug -Flow detention time= 67.2 min calculated for 0.895 of (87% of inflow) Center -of -Mass det. time= 27.2 min ( 784.8 - 757.6 ) Volume Invert Avail.Storage Storage Description #1 423.91' 10,323 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) M (cubic -feet) (cubic -feet) 423.91 1,587 0.0 0 0 427.91 1,587 40.0 2,539 2,539 430.91 1,587 25.0 1,190 3,729 431.00 1,627 100.0 145 3,874 432.00 2,041 100.0 1,834 5,708 433.00 2,350 100.0 2,196 7,904 434.00 2,489 100.0 2,420 10,323 Device Routino Invert Outlet Devices #1 Primary 424.43' 18.0" Round HDPE_Round 18" L= 61.4' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 424.43' / 423.82' S= 0.0099 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 1.77 sf #2 Device 1 431.91' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=20.44 cfs @ 11.98 hrs HW=432.67' (Free Discharge) L1=HDPE_Round 18" (Passes 20.44 cfs of 23.29 cfs potential flow) t2=Orifice/Grate (Weir Controls 20.44 cfs @ 2.85 fps) 2021-03-11 Full Routing Prepared by Timmons Grc i c m m W Type 1124-hr 100-YR Rainfa&9.16" Printed 3/11/2021 Pond 8P: BIORETENTION 2 Hydrograph Time (hours) Pond 813: BIORETENTION 2 Stage -Discharge 434 433 _.. ,. Orifice/Grate - 432 431 430- 429- .. ...... 428 ,_ ........_.. 427 426 425 HD 424 0 2 4 6 6 10 12 14 16 16 20 22 24 Discharge (de) ■ Inflow ■ Primary ❑ Primary 2021-03-11 Full Routing Prepared by Timmons Grc Type 1124-hr 100-YR Rainfa&9.16" Pond 8P: BIORETENTION 2 Stage -Area -Storage Storage (cubic -feet) Printed 3/11/2021 ■ Surface ■ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Pond 8P: BIORETENTION 2 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.02 2 423.91 0.00 5.50 0.04 56 424.00 0.00 6.00 0.06 142 424.13 0.00 6.50 0.08 264 424.33 0.00 7.00 0.10 423 424.58 0.00 7.50 0.12 620 424.89 0.00 8.00 0.14 858 425.26 0.00 8.50 0.19 1,155 425.73 0.00 9.00 0.25 1,555 426.36 0.00 9.50 0.29 2,048 427.14 0.00 10.00 0.38 2,635 428.15 0.00 10.50 0.53 3,441 430.18 0.00 11.00 0.79 4,609 431.43 0.00 11.50 1.40 5,772 432.03 1.35 12.00 20.06 7,167 432.68 20.82 12.50 1.77 5,839 432.06 1.90 13.00 1.09 5,743 432.02 1.11 13.50 0.82 5,709 432.00 0.84 14.00 0.65 5,681 431.99 0.66 14.50 0.57 5,667 431.98 0.58 15.00 0.51 5,653 431.97 0.52 15.50 0.45 5,639 431.97 0.46 16.00 0.40 5,625 431.96 0.40 16.50 0.37 5,617 431.95 0.37 17.00 0.35 5,612 431.95 0.35 17.50 0.33 5,607 431.95 0.33 18.00 0.31 5,602 431.95 0.31 18.50 0.29 5,597 431.94 0.29 19.00 0.26 5,591 431.94 0.27 19.50 0.24 5,586 431.94 0.25 20.00 0.22 5,581 431.94 0.23 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 423.91 0.00 423.97 0.00 424.03 0.00 424.09 0.00 424.15 0.00 424.21 0.00 424.27 0.00 424.33 0.00 424.39 0.00 424.45 0.00 424.51 0.00 424.57 0.00 424.63 0.00 424.69 0.00 424.75 0.00 424.81 0.00 424.87 0.00 424.93 0.00 424.99 0.00 425.05 0.00 425.11 0.00 425.17 0.00 425.23 0.00 425.29 0.00 425.35 0.00 425.41 0.00 425.47 0.00 425.53 0.00 425.59 0.00 425.65 0.00 425.71 0.00 425.77 0.00 425.83 0.00 425.89 0.00 425.95 0.00 426.01 0.00 426.07 0.00 426.13 0.00 426.19 0.00 426.25 0.00 426.31 0.00 426.37 0.00 426.43 0.00 426.49 0.00 426.55 0.00 426.61 0.00 426.67 0.00 426.73 0.00 426.79 0.00 426.85 0.00 426.91 0.00 426.97 0.00 Type 1124-hr 100-YR Rainfa&9.16" Stage -Discharge for Pond 8P: BIORETENTION 2 Elevation Primary (feet) (cfs) 427.03 0.00 427.09 0.00 427.15 0.00 427.21 0.00 427.27 0.00 427.33 0.00 427.39 0.00 427.45 0.00 427.51 0.00 427.57 0.00 427.63 0.00 427.69 0.00 427.75 0.00 427.81 0.00 427.87 0.00 427.93 0.00 427.99 0.00 428.05 0.00 428.11 0.00 428.17 0.00 428.23 0.00 428.29 0.00 428.35 0.00 428.41 0.00 428.47 0.00 428.53 0.00 428.59 0.00 428.65 0.00 428.71 0.00 428.77 0.00 428.83 0.00 428.89 0.00 428.95 0.00 429.01 0.00 429.07 0.00 429.13 0.00 429.19 0.00 429.25 0.00 429.31 0.00 429.37 0.00 429.43 0.00 429.49 0.00 429.55 0.00 429.61 0.00 429.67 0.00 429.73 0.00 429.79 0.00 429.85 0.00 429.91 0.00 429.97 0.00 430.03 0.00 430.09 0.00 Elevation Primary (feet) (cfs) 430.15 0.00 430.21 0.00 430.27 0.00 430.33 0.00 430.39 0.00 430.45 0.00 430.51 0.00 430.57 0.00 430.63 0.00 430.69 0.00 430.75 0.00 430.81 0.00 430.87 0.00 430.93 0.00 430.99 0.00 431.05 0.00 431.11 0.00 431.17 0.00 431.23 0.00 431.29 0.00 431.35 0.00 431.41 0.00 431.47 0.00 431.53 0.00 431.59 0.00 431.65 0.00 431.71 0.00 431.77 0.00 431.83 0.00 431.89 0.00 431.95 0.25 432.01 0.97 432.07 1.97 432.13 3.18 432.19 4.57 432.25 6.11 432.31 7.80 432.37 9.62 432.43 11.56 432.49 13.61 432.55 15.78 432.61 18.05 432.67 20.42 432.73 22.88 432.79 23.47 432.85 23.56 432.91 23.66 432.97 23.75 433.03 23.84 433.09 23.93 433.15 24.02 433.21 24.11 Printed 3/11/2021 Elevation Primary (feet) (cfs) 433.27 24.20 433.33 24.29 433.39 24.38 433.45 24.47 433.51 24.56 433.57 24.65 433.63 24.73 433.69 24.82 433.75 24.91 433.81 25.00 433.87 25.08 433.93 25.17 433.99 25.26 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Stage -Area -Storage for Pond 8P: BIORETENTION 2 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.91 1,587 0 424.06 1,587 95 424.21 1,587 190 424.36 1,587 286 424.51 1,587 381 424.66 1,587 476 424.81 1,587 571 424.96 1,587 667 425.11 1,587 762 425.26 1,587 857 425.41 1,587 952 425.56 1,587 1,047 425.71 1,587 1,143 425.86 1,587 1,238 426.01 1,587 1,333 426.16 1,587 1,428 426.31 1,587 1,524 426.46 1,587 1,619 426.61 1,587 1,714 426.76 1,587 1,809 426.91 1,587 1,904 427.06 1,587 2,000 427.21 1,587 2,095 427.36 1,587 2,190 427.51 1,587 2,285 427.66 1,587 2,381 427.81 1,587 2,476 427.96 1,587 2,559 428.11 1,587 2,619 428.26 1,587 2,678 428.41 1,587 2,738 428.56 1,587 2,797 428.71 1,587 2,857 428.86 1,587 2,916 429.01 1,587 2,976 429.16 1,587 3,035 429.31 1,587 3,095 429.46 1,587 3,154 429.61 1,587 3,214 429.76 1,587 3,273 429.91 1,587 3,333 430.06 1,587 3,392 430.21 1,587 3,452 430.36 1,587 3,511 430.51 1,587 3,571 430.66 1,587 3,630 430.81 1,587 3,690 430.96 1,609 3,809 431.11 1,673 4,056 431.26 1,735 4,311 431.41 1,797 4,576 431.56 1,859 4,850 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 431.71 1,921 5,134 431.86 1,983 5,426 432.01 2,044 5,729 432.16 2,090 6,039 432.31 2,137 6,356 432.46 2,183 6,680 432.61 2,229 7,011 432.76 2,276 7,348 432.91 2,322 7,693 433.06 2,358 8,045 433.21 2,379 8,400 433.36 2,400 8,759 433.51 2,421 9,120 433.66 2,442 9,485 433.81 2,463 9,853 433.96 2,483 10,224 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Summary for Pond 10P: DRY POND [82] Warning: Early inflow requires earlier time span [88] Warning: Qout>Qin may require smaller dt or Finer Routing Printed 3/11/2021 Inflow Area = 7.010 ac, 60.49% Impervious, Inflow Depth > 6.65" for 100-YR event Inflow = 80.29 cfs @ 11.96 hrs, Volume= 3.884 of Outflow = 81.26 cfs @ 11.97 hrs, Volume= 3.556 af, Atten= 0%, Lag= 0.5 min Primary = 81.26 cfs @ 11.97 hrs, Volume= 3.556 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 425.50' @ 11.97 hrs Surf.Area= 4,897 sf Storage= 24,524 cf Plug -Flow detention time= 53.3 min calculated for 3.556 of (92% of inflow) Center -of -Mass det. time= 22.8 min ( 776.8 - 754.0 ) Volume Invert Avail.Storage Storage Description #1 418.00' 29,593 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 418.00 1,493 0 0 419.00 1,914 1,704 1,704 420.00 2,380 2,147 3,851 421.00 2,888 2,634 6,485 422.00 3,430 3,159 9,644 423.00 3,995 3,713 13,356 424.00 4,379 4,187 17,543 425.00 4,734 4,557 22,100 426.00 5,058 4,896 26,996 426.50 5,330 2,597 29,593 Device Routino Invert Outlet Devices #1 Primary 417.90' 24.0" Round Culvert L= 117.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 417.90' / 417.01' S= 0.0075 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 3.14 sf #2 Device 1 418.00' 4.0" W x 4.2" H Vert. Orifice/Grate C= 0.600 #3 Device 1 423.92' 60.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 424.99' 45.0' long x 5.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65 2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88 Primary OutFlow Max=77.51 cfs @ 11.97 hrs HW=425.47' (Free Discharge) 1_Cu lvert (Inlet Controls 38.78 cfs @ 12.34 fps) �2=Orifice/Grate (Passes < 1.52 cfs potential flow) 3=Orifice/Grate (Passes < 99.21 cfs potential flow) =Broad -Crested Rectangular Weir (Weir Controls 38.73 cfs @ 1.79 fps) 2021-03-11 Full Routing Prepared by Timmons Grc 42 42 42 42 c 0 m 42 W 42 42 41 41 0 Type 1124-hr 100-YR Rainfa&9.16" Printed 3/11/2021 LLC Paae107 Pond 10P: DRY POND Hydrograph Time (hours) Pond 10P: DRY POND Stage -Discharge 8 LU 4U UU aU lUU l[U 14U 1w laU LUU LLU 24U L(jU Discharge ids) ■ Irrflow ■ Primary 0 Primary 2021-03-11 Full Routing Prepared by Timmons Grc 42 42 42 42 c 0 m 4 W 42 42 41 41 Type 1124-hr 100-YR Rainfa&9.16" Printed 3/11/2021 LLC Page108 Pond 10P: DRY POND Stage -Area -Storage Surface/Horizontal/Wetted Area (sq-ft) n 5nn 1 nnn 1 5nn 2 nnn 2 enn n nnn ISM 4 nnn 4 5nn 5 nnn 22 6 OOK 5 4 3 1 0 y jCustom Stage Data S 0 5,000 10,000 15,000 20.000 25,000 Storage (cubic -feet) ■ Surtace ■ Storage 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Pond 10P: DRY POND Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 5.00 0.14 12 418.01 0.00 5.50 0.21 261 418.17 0.08 6.00 0.28 471 418.30 0.18 6.50 0.36 646 418.41 0.26 7.00 0.44 835 418.52 0.33 7.50 0.53 1,064 418.65 0.39 8.00 0.61 1,339 418.81 0.44 8.50 0.80 1,734 419.02 0.51 9.00 1.05 2,388 419.34 0.61 9.50 1.17 3,228 419.73 0.70 10.00 1.51 4,257 420.17 0.79 10.50 2.10 5,943 420.81 0.91 11.00 3.09 8,777 421.74 1.06 11.50 5.43 14,146 423.20 1.26 12.00 74.91 24,331 425.46 76.68 12.50 6.57 18,194 424.15 7.02 13.00 4.02 17,810 424.06 4.15 13.50 3.04 17,654 424.03 3.13 14.00 2.39 17,529 424.00 2.46 14.50 2.10 17,449 423.98 2.13 15.00 1.89 17,398 423.97 1.92 15.50 1.68 17,346 423.95 1.71 16.00 1.46 17,276 423.94 1.52 16.50 1.36 17,212 423.92 1.38 17.00 1.28 17,154 423.91 1.35 17.50 1.21 16,980 423.87 1.34 18.00 1.13 16,680 423.80 1.33 18.50 1.05 16,259 423.70 1.32 19.00 0.98 15,724 423.58 1.31 19.50 0.90 15,081 423.42 1.29 20.00 0.82 14,335 423.24 1.26 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Elevation Primary (feet) (cfs) 418.00 0.00 418.10 0.03 418.20 0.10 418.30 0.18 418.40 0.26 418.50 0.32 418.60 0.36 418.70 0.41 418.80 0.44 418.90 0.48 419.00 0.51 419.10 0.54 419.20 0.57 419.30 0.60 419.40 0.62 419.50 0.65 419.60 0.67 419.70 0.69 419.80 0.72 419.90 0.74 420.00 0.76 420.10 0.78 420.20 0.80 420.30 0.82 420.40 0.84 420.50 0.86 420.60 0.87 420.70 0.89 420.80 0.91 420.90 0.93 421.00 0.94 421.10 0.96 421.20 0.98 421.30 0.99 421.40 1.01 421.50 1.02 421.60 1.04 421.70 1.05 421.80 1.07 421.90 1.08 422.00 1.10 422.10 1.11 422.20 1.13 422.30 1.14 422.40 1.15 422.50 1.17 422.60 1.18 422.70 1.19 422.80 1.21 422.90 1.22 423.00 1.23 423.10 1.25 Type II 24-hr 100-YR Rainfall=9.16" Stage -Discharge for Pond 10P: DRY POND Elevation Primary (feet) (cfs) 423.20 1.26 423.30 1.27 423.40 1.28 423.50 1.30 423.60 1.31 423.70 1.32 423.80 1.33 423.90 1.34 424.00 2.52 424.10 5.29 424.20 8.99 424.30 13.42 424.40 18.48 424.50 24.10 424.60 30.23 424.70 36.43 424.80 36.74 424.90 37.05 425.00 37.47 425.10 41.51 425.20 48.14 425.30 57.13 425.40 68.22 425.50 81.64 425.60 97.02 425.70 111.84 425.80 127.65 425.90 144.71 426.00 162.67 426.10 181.05 426.20 200.16 426.30 220.25 426.40 241.08 426.50 262.97 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Grc Type 11 24-hr 100-YR Rainfall=9.16" Stage -Area -Storage for Pond 10P: DRY POND Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 418.00 1,493 0 418.10 1,535 151 418.20 1,577 307 418.30 1,619 467 418.40 1,661 631 418.50 1,704 799 418.60 1,746 972 418.70 1,788 1,148 418.80 1,830 1,329 418.90 1,872 1,514 419.00 1,914 1,704 419.10 1,961 1,897 419.20 2,007 2,096 419.30 2,054 2,299 419.40 2,100 2,506 419.50 2,147 2,719 419.60 2,194 2,936 419.70 2,240 3,157 419.80 2,287 3,384 419.90 2,333 3,615 420.00 2,380 3,851 420.10 2,431 4,091 420.20 2,482 4,337 420.30 2,532 4,587 420.40 2,583 4,843 420.50 2,634 5,104 420.60 2,685 5,370 420.70 2,736 5,641 420.80 2,786 5,917 420.90 2,837 6,198 421.00 2,888 6,485 421.10 2,942 6,776 421.20 2,996 7,073 421.30 3,051 7,375 421.40 3,105 7,683 421.50 3,159 7,996 421.60 3,213 8,315 421.70 3,267 8,639 421.80 3,322 8,968 421.90 3,376 9,303 422.00 3,430 9,644 422.10 3,487 9,989 422.20 3,543 10,341 422.30 3,600 10,698 422.40 3,656 11,061 422.50 3,713 11,429 422.60 3,769 11,803 422.70 3,825 12,183 422.80 3,882 12,568 422.90 3,938 12,959 423.00 3,995 13,356 423.10 4,033 13,757 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 423.20 4,072 14,163 423.30 4,110 14,572 423.40 4,149 14,985 423.50 4,187 15,402 423.60 4,225 15,822 423.70 4,264 16,247 423.80 4,302 16,675 423.90 4,341 17,107 424.00 4,379 17,543 424.10 4,415 17,983 424.20 4,450 18,426 424.30 4,486 18,873 424.40 4,521 19,323 424.50 4,557 19,777 424.60 4,592 20,234 424.70 4,627 20,695 424.80 4,663 21,160 424.90 4,698 21,628 425.00 4,734 22,100 425.10 4,766 22,575 425.20 4,799 23,053 425.30 4,831 23,534 425.40 4,864 24,019 425.50 4,896 24,507 425.60 4,928 24,998 425.70 4,961 25,493 425.80 4,993 25,990 425.90 5,026 26,491 426.00 5,058 26,996 426.10 5,112 27,504 426.20 5,167 28,018 426.30 5,221 28,537 426.40 5,276 29,062 426.50 6,330 29,593 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Printed 3/11/2021 Summary for Link 3L: PRE Combined Inflow Area = 16.080 ac, 4.48% Impervious, Inflow Depth > 4.13" for 100-YR event Inflow = 124.19 cfs @ 11.97 hrs, Volume= 5.539 of Primary = 124.19 cfs @ 11.97 hrs, Volume= 5.539 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 3L: PRE Combined Hydrograph ■ InMov ■ Primary Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Link 3L: PRE Combined Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 5.00 0.00 0.00 0.00 5.25 0.00 0.00 0.00 5.50 0.00 0.00 0.00 5.75 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.25 0.00 0.00 0.00 6.50 0.01 0.00 0.01 6.75 0.01 0.00 0.01 7.00 0.02 0.00 0.02 7.25 0.03 0.00 0.03 7.50 0.03 0.00 0.03 7.75 0.04 0.00 0.04 8.00 0.05 0.00 0.05 8.25 0.06 0.00 0.06 8.50 0.08 0.00 0.08 8.75 0.09 0.00 0.09 9.00 0.16 0.00 0.16 9.25 0.27 0.00 0.27 9.50 0.38 0.00 0.38 9.75 0.52 0.00 0.52 10.00 0.71 0.00 0.71 10.25 0.96 0.00 0.96 10.50 1.30 0.00 1.30 10.75 1.77 0.00 1.77 11.00 2.41 0.00 2.41 11.25 3.54 0.00 3.54 11.50 5.24 0.00 5.24 11.75 30.40 0.00 30.40 12.00 119.33 0.00 119.33 12.25 17.58 0.00 17.58 12.50 11.54 0.00 11.54 12.75 8.53 0.00 8.53 13.00 7.19 0.00 7.19 13.25 6.23 0.00 6.23 13.50 5.50 0.00 5.50 13.75 4.89 0.00 4.89 14.00 4.36 0.00 4.36 14.25 4.04 0.00 4.04 14.50 3.86 0.00 3.86 14.75 3.68 0.00 3.68 15.00 3.49 0.00 3.49 15.25 3.30 0.00 3.30 15.50 3.11 0.00 3.11 15.75 2.92 0.00 2.92 16.00 2.72 0.00 2.72 16.25 2.61 0.00 2.61 16.50 2.54 0.00 2.54 16.75 2.48 0.00 2.48 17.00 2.41 0.00 2.41 17.25 2.34 0.00 2.34 17.50 2.27 0.00 2.27 17.75 2.20 0.00 2.20 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 18.00 2.13 0.00 2.13 18.25 2.06 0.00 2.06 18.50 1.99 0.00 1.99 18.75 1.92 0.00 1.92 19.00 1.85 0.00 1.85 19.25 1.78 0.00 1.78 19.50 1.71 0.00 1.71 19.75 1.64 0.00 1.64 20.00 1.57 0.00 1.57 Printed 3/11/2021 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Printed 3/11/2021 Summary for Link 13L: POST Combined Inflow Area = 16.220 ac, 55.49% Impervious, Inflow Depth > 5.86" for 100-YR event Inflow = 179.09 cfs @ 11.98 hrs, Volume= 7.918 of Primary = 179.09 cfs @ 11.98 hrs, Volume= 7.918 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 13L: POST Combined Hydrograph ■ Inflow ■ Primary Time (hours) 2021-03-11 Full Routing Prepared by Timmons Gro Type II 24-hr 100-YR Rainfall=9.16" Hydrograph for Link 13L: POST Combined Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 5.00 0.01 0.00 0.01 5.25 0.05 0.00 0.05 5.50 0.10 0.00 0.10 5.75 0.15 0.00 0.15 6.00 0.21 0.00 0.21 6.25 0.26 0.00 0.26 6.50 0.30 0.00 0.30 6.75 0.34 0.00 0.34 7.00 0.37 0.00 0.37 7.25 0.41 0.00 0.41 7.50 0.44 0.00 0.44 7.75 0.48 0.00 0.48 8.00 0.51 0.00 0.51 8.25 0.56 0.00 0.56 8.50 0.61 0.00 0.61 8.75 0.67 0.00 0.67 9.00 0.74 0.00 0.74 9.25 0.81 0.00 0.81 9.50 0.86 0.00 0.86 9.75 0.93 0.00 0.93 10.00 1.01 0.00 1.01 10.25 1.11 0.00 1.11 10.50 1.22 0.00 1.22 10.75 1.37 0.00 1.37 11.00 2.32 0.00 2.32 11.25 4.72 0.00 4.72 11.50 7.46 0.00 7.46 11.75 50.34 0.00 50.34 12.00 174.06 0.00 174.06 12.25 25.16 0.00 25.16 12.50 15.97 0.00 15.97 12.75 11.26 0.00 11.26 13.00 9.45 0.00 9.45 13.25 8.06 0.00 8.06 13.50 7.10 0.00 7.10 13.75 6.27 0.00 6.27 14.00 5.58 0.00 5.58 14.25 5.10 0.00 5.10 14.50 4.85 0.00 4.85 14.75 4.61 0.00 4.61 15.00 4.37 0.00 4.37 15.25 4.13 0.00 4.13 15.50 3.88 0.00 3.88 15.75 3.65 0.00 3.65 16.00 3.43 0.00 3.43 16.25 3.25 0.00 3.25 16.50 3.14 0.00 3.14 16.75 3.06 0.00 3.06 17.00 3.01 0.00 3.01 17.25 2.96 0.00 2.96 17.50 2.91 0.00 2.91 17.75 2.85 0.00 2.85 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 18.00 2.80 0.00 2.80 18.25 2.75 0.00 2.75 18.50 2.69 0.00 2.69 18.75 2.63 0.00 2.63 19.00 2.58 0.00 2.58 19.25 2.52 0.00 2.52 19.50 2.46 0.00 2.46 19.75 2.40 0.00 2.40 20.00 2.34 0.00 2.34 Printed 3/11/2021