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HomeMy WebLinkAboutWPO201900034 Calculations 2019-05-31UVA Encompass Health Rehabilitation Hospital COUNTY OF ALBEMARLE, VIRGINIA VSMP WPO 2019 DESIGN CALCULATIONS & NARRATIVE MAY 249 2019 TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: John Hash, PE Timmons Group 608 Preston Ave, Suite 200 Charlottesville, VA 22903 434.327.1691 ;TH op Lie. No. 31371 5-24-I - ��sstora�� �� Table of Contents Section Title Project Narrative 2 LD 229 — Storm Sewer Design Computations 3 LD 204 — Storm Inlet Design Computations 4 LD 347 — Hydraulic Grade Line Computations 5 Stormwater Management Exhibit for Pond 1 6 Drainage Subbasin Map — Developed Condition, Flat Branch — Tributary to North Fork Rivanna River, UVA Research Part at North Fork Project Narrative: This project includes the construction of a rehabilitation hospital and associated parking, utilities & landscaping. This development will utilize access points directly adjacent to the property. See project titled "UVA Research Park Loop Road" for additional information. The total limits of clearing and grading are 6.52 acres. Stormwater Management: Per the document "Stormwater Management/ BMP Analysis and Floodplan Study for the UVA Research Park at Northfork" by Dewberry & Davis, October 1997, The Research Park ponds has been master planned for stormwater management for the future build -out of the research park. This development drains to the large wetpond, designated Pond 1, to the north that was designed and constructed to handle quantity and quality for the future build -out of the research park including this property development. This pond is referred to as Pond 1 on SDP 199800043. For the approved drainage areas and CN values, see Drainage Subbasin Map — Developed Condition, Flat Branch — Tributary to North Fork Rivanna River, UVA Research Park at North Fork. The proposed development was analyzed to determine the amount of impermeable and permeable surface area. These values have been incorporated into the overall CN value for the drainage area map previously approved in drawings by others. All non -pavement areas within the limits of disturbance were assumed to become to turf, though some may be restored to a forested condition. Although the measurements of each drainage divide area vary slightly due to different mapping techniques, they are assumed to be substantially similar. For the proposed drainage areas and CN values, see Stormwater Management Exhibit for Pond 1. The calculated proposed CN values are within the limits of the approved future condition. See Table 1 for a comparison of the CN values in the approved future condition and the with the proposed roadway. Note that only drainage area F2 is impacted by construction of the rehabilitation hospital. Approved Drainage Areas and CN Values 7/23/1997 Area (Ac.) CN Al 57.25 79 A2 12.61 64 131 54.48 72 B2 48.56 80 C1 27.38 80 C2 85.84 82 D1 12.33 78 D2 84.03 86 E1 27.8 81 E2 17.28 83 F1 66.44 91 F2 31.64 91 G1 48.9 92 G2 49.05 92 Proposed Drainage Areas and CN Values 5/24/2018 Area (Ac.) CN Al 56.35 60 A2 11.77 55 131 49.59 50 B2 47.79 67 C1 31.15 42 C2 83.90 67 D1 9.55 51 D2 81.90 70 E1 28.71 55 E2 16.91 38 F1 64.97 53 F2 30.75 54 G1 47.53 76 G2 49.25 72 Table 1 — Drainage Areas and CN Values LD-229 STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 10 PROJECT: UVA ENCOMPASS HEALTH REHABILITATION HOSPITAL LOCATION: ALBEMARLE, COUNTY COUNTY: Charlottesville NOAA STATION: Designed by: A. MABEE Checked by: UNITS I ENGLISH PIPE, NO. FROM POINT TO POINT DRAIN. AREA "A" Acre (3) RUNOFF COEFF. "C" (4) CA TOTAL 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 Sec. (17) 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 Hrn Ft. Vn Ft/Sec (16) En Ft. REFERENCE (1) STA. REFERENCE (2) STA. 101 102 100 0.15 0.83 0.12 3.20 7.43 5.84 0.00 26.42 553.50 552.50 37.72 0.02651 24 Circular 1 39.90 0.01210 1.19 1.95 0.55 13.58 4.05 2.78 103 104 102 0.13 0.86 0.11 1.29 6.50 6.09 0.00 16.08 562.04 561.55 65.47 0.00748 24 Circular 1 21.20 0.00450 1.30 2.17 0.58 7.42 2.16 8.82 105 106 104 0.05 0.87 0.05 1.18 6.15 6.19 0.00 15.40 563.29 562.14 152.93 0.00752 24 Circular 1 21.25 0.00410 1.26 2.09 0.57 7.37 2.11 20.74 107 108 106 0.30 0.85 0.25 0.79 5.61 6.35 0.00 13.10 564.16 563.39 102.11 0.00754 24 Circular 1 21.28 0.00300 1.13 1.84 0.54 7.12 1.92 14.34 109 110 108 0.07 0.36 0.03 0.54 5.36 6.43 0.00 11.49 565.04 564.26 104.47 0.00747 24 Circular 1 21.18 0.00230 1.05 1.67 0.52 6.88 1.78 15.19 111 112 110 0.57 0.90 0.51 0.51 5.08 6.52 0.00 11.33 566.01 565.14 116.50 0.00747 24 Circular 1 21.18 0.00220 1.04 1.65 0.51 6.86 1.77 16.99 121 122 106 0.12 0.90 0.11 0.34 5.94 6.25 0.00 2.18 567.18 564.21 98.92 0.03002 12 Circular 1 6.69 0.00330 0.39 0.29 0.21 7.62 1.29 12.99 123 124 122 0.19 0.77 0.14 0.23 5.20 6.48 0.00 1.51 568.64 567.28 181.30 0.00750 10 Circular 1 2.06 0.00420 0.53 0.37 0.24 4.12 0.79 44.00 125 126 124 0.19 0.49 0.09 0.09 5.00 6.54 0.00 0.59 569.03 568.74 39.22 0.00739 10 Circular 1 2.04 0.00060 0.31 0.18 0.17 3.24 0.47 12.11 131 132 102 0.22 0.35 0.08 0.08 5.00 6.54 0.00 0.50 563.72 561.50 74.15 0.02994 12 Circular 1 6.68 0.00020 0.19 0.10 0.11 5.01 0.58 14.79 133 134 102 0.47 0.90 0.42 1.71 6.62 6.05 0.00 10.63 561.73 559.25 327.64 0.00757 24 Circular 1 21.32 0.00200 1.00 1.57 0.50 6.78 1.71 48.31 135 136 134 0.08 0.90 0.07 1.29 6.09 6.20 0.00 8.07 563.32 561.83 199.00 0.00749 18 Circular 1 9.85 0.00520 1.03 1.30 0.44 6.22 1.63 32.00 137 138 136 0.43 0.76 0.32 1.22 5.95 6.25 0.00 7.62 563.82 563.42 52.75 0.00758 18 Circular 1 9.91 0.00470 0.99 1.23 0.43 6.18 1.58 8.53 139 140 138 0.13 0.89 0.12 0.89 5.83 6.28 0.00 5.60 564.12 563.82 39.93 0.00751 15 Circular 1 6.07 0.00670 0.95 1.00 0.38 5.61 1.44 7.12 141 142 140 0.29 0.63 0.18 0.18 5.00 6.54 0.00 1.20 567.19 566.28 120.71 0,00754 12 Circular 1 3.35 0.00100 0.41 0.31 0.22 3.92 0.65 30.81 143 144 142 0.20 0.90 0.18 0.59 5.65 6.33 0.00 3.82 564.63 564.22 54.65 0.00750 15 Circular 1 6.06 0.00310 0.72 0.73 0.34 5.22 1.14 10.47 145 146 144 0.31 0.74 0.23 0.41 5.60 6.54 0.00 2.68 564.84 564.73 14.62 0.00752 12 Circular 1 3.35 0.00500 0.68 0.57 0.29 4.74 1.03 3.09 147 148 1 146 1 0.20 0.90 0.18 0.18 1 5.00 6.54 0.00 1.18 1 565.94 564.94 132.77 0.00753 12 Circular 1 3.09 0.00110 0.43 0.32 0.23 3.67 0.64 36.16 EX18 112 0.00 0.00 0.00 5.00 0.00 7.98 566.40 566.11 29.29 0.00990 18 Circular 1 1 10.45 1 0.00600 0.98 1.23 0.43 1 6.51 1.64 4.50 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 1 OF 3 ROUTE PROJECT UVA ENCOMPASS HEALTH REHABILITATION HOSPITAL DESIGNER: A. MABEE CHECKED: DATE 5/22/2019 UNITS ENGLISH INLET z p F F w ¢ w,¢x ¢ U ¢ ¢.... u ¢, u w � c '� .L Z � u w U ZCy w r K vi ¢ W UU O w F v; ,r �U a w � ``' �i C7 - w N F" ❑. �c��., o ¢ W ea. vz F" "' F: F .k.. 7 c7 3 H 3 p w F- �-' F, �" Ca7 'J�^ ,r 3 v] � d a ¢ o w i-: �% c S 0 OC: .� u �,; x 0. [-" �?Z F 1 cc o. ¢ w •o zv; w >O r x � u� Sag Inlets Only ¢ � a r `�• � x F z m -- �� oz 3 z " d I DI-3C 8.000 0.129 0.90 0.1161 Back/Lt. 0.000'RIGH 0.020 0.35 0.007 Back/Lt. 0.123 4 0.492 0 0.0196 0.0208 1.953 2.000 1.0241 0.0833 4.0048 3.50 Back/Lt. 0 4 0 0 Ahead/Rt. 0.492 0.0196 8 0.492 0.836 0.166 0.0138 12.0029 2.836 3.351 Weir Flow 104 DI-3B 8.000 0.120 0.90 0.108 0.000'RIGH 0.011 0.35 0.0039 0.112 4 0.448 0 0.448 0.0134 0.0208 2.100 2.000 0.9524 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.277 8.000 1.870 1.000 0.448 0.000 2.024 106 DI-3B 4.000 0.050 0.90 0.045 O'RIGHT 0.003 035 0.0011 0.046 4 0.184 0 0.184 0.0097 0.0208 1.542 2.000 1.297 0.0833 4.0048 1.000 3.50 0.1458 0.1666 2.671 4.000 1.498 1.000 0.184 0.000 1.541 108 DI-3B 6.000 0.270 0.90 0.243 O'RIGHT 0.030 0.35 0.0105 0.254 4 1.016 0 1.016 0.0140 0.0208 4.638 2.000 0.4312 0.0833 4.0048 0.910 3.50 0.1458 0.1535 6.420 6.000 0.935 0.993 1.008 0.008 2.658 110 DI-1 2.000 0.070 0.35 0.0245 Back/Lt. 0.000'RIGHT 0.025 4 0.1 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.100 0.0100 2.000 2 0.100 0.597 Weir Flow 112 DI-1 2.000 0.017 0.90 0.0153 Back/Lt. 0.000'RIGH 0.150 0.35 0.0525 Back/Lt. 0.068 4 0.272 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.272 0.0100 2.000 2 0.272 1.164 Weir Flow 122 DI-1 1.500 0.280 0.35 0.098 Back/Lt. 0.000'RIGHT 0.098 4 0.392 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.392 0.0100 1.500 1.5 0.392 1.745 Weir Flow 124 DI-1 1.500 0.140 090 0.126 Back/Lt. 0.000'RIGH 0.045 0.35 0.0158 Back/Lt. 0.142 4 0.569 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.568 0.0100 1.500 1.5 0.568 2.234 Weir Flow IE Dl-1 1.500 0.045 0 90 0.0405 Back/Lt. 0.000'RIGH 0.140 0.35 0.049 Back/Lt. INLETSOFT BY ENSOFTEC DATE: 5/22/2019 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 2 OF 3 ROUTE PROJECT UVA ENCOMPASS HEALTH REHABILITATION HOSPITAL DESIGNER: A. MABEE CHECKED: DATE 5/22/2019 UNITS ENGLISH INLET H v d¢ U ww z� U U�? Fw :� v - F F �w Owv F Xw 7 F �?° O UOz yr C7 w Q m o i- .. z� 6 w A d y a O Sag Inlets Only x i H Wz 72 J= o Q A x n �� 0.09 4 0.36 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.360 0.001 1.500 1.5 0.360 1.649 Weir Flow 132 DI-1 2.000 0.220 0.35 0.077 Back/Lt. 0.000'RIGHT 0.077 4 0.308 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.308 0.0100 2.000 2 0.308 1.226 Weir Flow 134 DI-3C 6.000 0.330 0.90 0.297 Back/Lt. 0.000'RIGH 0.200 0.35 0.07 Back/Lt. 0.367 4 1.468 0 0.0187 0.0208 5.389 2.000 0.3711 0.0833 4.0048 3.50 Back/Lt. 0 4 0 0 Ahead/Rt. 1.468 0.0187 6 1.468 1.968 0.166 0.0138 12.0029 3.968 7.883 Weir Flow 136 DI-3B 8.000 0.240 0.90 0.216 O'RIGHT 0.220 0.35 0.077 0.293 4 1.172 0 1.172 0.0225 0.0208 4.328 2.000 0.4621 0.0833 4.0048 0.929 3.50 0.1458 0.1563 7.775 8.000 1.029 1.000 1.172 0.000 2.580 138 DI-3B 8.000 0.317 0.90 0.2853 O'RIGHT 0.110 0.35 0.0385 0.324 4 1296 0 1.296 0.0174 0.0208 5.088 2.000 0.3931 0.0833 4.0048 0.880 3.50 0.1458 0.1492 7.722 8.000 1.036 1.000 1.296 0.000 2.770 140 DI-3B 8.000 0.130 0.90 0.117 O'RIGHT 0.001 0.35 0.0004 0.117 4 0.468 0 0.468 0.0145 0.0208 2.112 2.000 0.947 0.0833 4.0048 1.000 3.50 0.1458 0.1666 4.460 8.000 1.794 1.000 0.468 0.000 2.027 142 DI-3B 8.000 0.150 0.90 0.135 O'RIGHT 0.140 0.35 0.049 0.184 4 0.736 0 0.736 0.0233 0.0208 2.781 2.000 0.7192 0.0833 4.0048 0.994 3.50 0.1458 0.1657 6.240 8.000 1.282 1.000 0.736 0.000 2.194 144 DI-3B 8.000 0.140 0.90 0.126 O'RIGHT 0.030 0.35 0.0105 0.137 4 0.548 0 0.548 0.0283 0.0208 1.898 2.000 1.0537 0.0833 4.0048 1.000 3.50 0.1458 0.1666 5.825 8.000 1.373 1.000 0.548 0.000 1.898 146 DI-3B 8.000 0.220 0.90 0.198 O'RIGHT 0.090 0.35 0.0315 0.23 4 092 0 0.920 0.0236 0.0208 3.468 2.000 0.5767 0.0833 4.0048 0.973 3.50 0.1458 0.1627 6.955 8.000 1.150 1.000 0.920 0.000 2.366 148 DI-1 2.000 0.180 0.35 0.063 Back/Lt. INLETSOFT BY ENSOFTEC DATE: 5/22/2019 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 3 OF 3 ROUTE PROJECT UVA ENCOMPASS HEALTH REHABILITATION HOSPITAL DESIGNER: A. MABEE CHECKED: DATE 5/22/2019 UNITS ENGLISH INLET o Sag Inlets Only 72 A 6 v c t- QF d¢ U ww U LU Fw Owv 3 aFw a ' r % .� U .F\1 °i U p7Oy, U :J / w z UU Uz d O 0.000'RIGHT 0.063 4 0.252 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.252 0.001 2.000 2 0.252 1.106 T > 8.0 8 INLETSOFT BY ENSOFTEC DATE: 5/22/2019 LD-347 HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY -Year PROJECT: UVA ENCOMPASS HEALTH REHABILITATION HOSPITAL DESIGNED BY: A. MABEE 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 (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) 1 (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (16) (17) (18) (19) 100 554.500 102 552.500 2.00 554.500 24 26.422 37.72 0.01215 0.458 13.578 0.716 7.422 0.855 0.299 0.0 0.00 0.000 1.015 0.718 1.015 YES 0.508 0.966 555.466 570.840 O.K. 134 559.250 2.00 560.850 24 10.626 327.64 0.00197 0.644 6.782 0.179 6.218 0.600 0.210 0.0 0.00 0.000 0.389 2.560 0.505 YES 0.253 0.896 562.728 569.340 O.K. 136 561.830 1.50 563.030 18 8.066 199.00 0.00525 1.045 6.218 0.150 6.183 0.594 0.208 0.0 0.00 0.000 0.358 0.447 0.358 YES 0.179 1.224 564.353 569.610 O.K. 138 563.420 1.50 564.620 18 7.619 52.75 0.00469 0.247 6.183 0.148 5.609 0.489 0.171 0.0 0.00 0.000 0.319 2.024 0.415 NO 0.415 0.662 565.282 570.320 O.K. 140 563.820 1.25 565.282 15 5.596 39.93 0.00668 0.267 5.609 0.122 3.918 0.238 0.083 0.0 0.00 0.000 0.206 0.735 0.206 YES 0.103 0.370 565.652 571.020 O.K. 142 566.280 1.00 567.080 12 1.204 120.71 0.00102 0.123 3.918 0.060 5.222 0.423 0.148 0.0 0.00 0.000 0.208 1.204 0.270 YES 0.135 0.258 567.604 573.330 O.K. 144 564.220 1.25 567.604 15 3.822 54.65 0.00312 0.170 5.222 0.106 4.737 0.348 0.122 0.0 0.00 0.000 0.228 1.140 0.296 YES 0.148 0.318 567.922 571.650 O.K. 146 564.730 1.00 567.922 12 2.682 14.62 0.00505 0.074 4.737 0.087 3.672 0.209 0.073 0.0 0.00 0.000 0.160 1.505 0.209 YES 0.104 0.178 568.101 571.650 O.K. 148 564.940 1.00 568.101 12 1.178 132.77 0.00114 0.152 3.672 0.052 0.000 0.000 0.000 0.0 0.00 0.000 0.052 1.178 0.068 YES 0.034 0.186 568.286 569.940 O.K. 132 561.500 1.00 562.300 12 0.504 74.15 0.00018 0.013 5.013 0.098 0.000 0.000 0.000 0.0 0.00 0.000 0.098 0.504 0.127 NO 0,127 0.140 563.906 572.310 O.K. 104 561.550 2.00 563.150 24 16.083 65.47 0.00450 0.295 7.422 0.214 7.373 0.844 0.295 0.0 0.00 0.000 0.509 0.682 0.509 YES 0.255 0.549 563.699 571.610 O.K. 106 562.140 2.00 563.740 24 15.401 152.93 0.00413 0.631 7.373 0.211 7.122 0.788 0.276 0.0 0.00 0.000 0.487 0.285 0.487 YES 0.243 0.875 564.615 572.210 O.K. 122 564.210 1.00 565.010 12 2.184 98.92 0.00335 0.331 7.617 0.225 4.121 0.264 0.092 0.0 0.00 0.000 0.318 0.675 0.413 NO 0.413 0.744 567.573 571.850 O.K. 124 567.280 0.83 567.947 10 1.509 181.30 0.00423 0.766 4.121 0.066 3.239 0.163 0.057 0.0 0.00 0.000 0.123 0.920 0.160 NO 0.160 0.926 569.170 572.680 O.K. 126 568.740 0.83 569.407 10 0.589 39.22 0.00064 0.025 3.239 0.041 0.000 0.000 0.000 0.0 0.00 0.000 0.041 0.589 0.053 NO 0.053 0.078 569.485 573.030 O.K. 108 563.390 2.00 564.990 24 13.098 102.11 0.00299 0.305 7.122 0.197 6.879 0.735 0.257 0.0 0.00 0.000 0.454 1.612 0.454 YES 0.227 0.532 565.522 570.660 O.K. 110 564.260 2.00 565.860 24 11.486 104.47 0.00230 0.240 6.879 0.184 6.855 0.730 0.255 0.0 0.00 0.000 0.439 0.161 0.439 NO 0.439 0.679 566.539 570.920 O.K. 112 565.140 2.00 566.740 24 11.325 116.50 0.00223 0.260 6.855 0.182 6.514 0.659 0.231 0.0 0.00 0.000 0.413 3.344 0.537 YES 0.268 0.529 567.269 571.050 O.K. 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L ^ b fill —� 1 1 now 1 ` 1 ' r4925 72 1 ; AREA G2 I' `� ` 00 wo ---� or -k r8190 70 40 1 7 0�jv AREA D2 1 9 1 r6494 53 1 1 47.53 76 I 1 � AREA F1 AREA G 1 / / 1 iago goo 1 � / 1 9.55 51 ♦` 1 REA D1 100 00 I I I I I aft _ — � 1 54 r1728 0.83 AREA E2*41 31. m OHM wy��� A � 1 � 1 _ -% 28.71 55 AREA E1ftft *so 1 i DRAINAGE DIVIDES AND AREA NAMES ARE TAKEN "STORMW TER MANAGEMENT/BMP ANALYSIS AND FLOODPLA STUDY FOR THE UVA RESEARCH PARK NORTHFOR " BY DEWBERRY & DAVIS, DATED OCTO s. w'..' 000-is a '** oft LEGEND HYDROLOGIC SOIL GROUP HYDROLOGIC SOIL GROUP TURF WOODS HYDROLOGIC SOIL GROUP B, TURF HYDROLOGIC SOIL GROUP B, WOODS HYDROLOGIC SOIL GROUP C, TURF HYDROLOGIC SOIL GROUP C, WOODS HYDROLOGIC SOIL GROUP D, TURF HYDROLOGIC SOIL GROUP D, WOODS IMPERMEABLE SURFACES 4WI ' AREA, IN ACRES ` 28.71 / AREi i � (477.7967 1 1 AREA B2 r� 1 1 1 1 I 1 I 1 I 1 I 1 1 I 1 1 1 1 1 50 h ,� / B 1 1 / `♦ 000 / s / 55 11.76 / / 1 AREA A2 1 r5635 60 / AREA Al / 1 / / / 1 1 1 1 UVA ENCOMPASS HEALTH - STORMWATER MANAGEMENT EXHIBIT FOR POND 1 CN VALUE DRAINAGE DIVIDE r: � ��NTA SCALE Vk300' MAY 245 2019 TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS.