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HomeMy WebLinkAboutWPO202200032 Calculations 2023-02-08Berkmar Self Storage COUNTY OF ALBEMARLE, VIRGINIA VSMP WPO-2022-00032 STORMWATER DESIGN NARRATIVE & CALCULATIONS JULY 15, 2022 REV. OCTOBER 13, 2022 REV. FEBRUARY 6, 2022 00000 . s • TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Timmons Group Campbell Bolton, PE 608 Preston Ave, Suite 200 Charlottesville, VA 22903 434.327.1698 Uc. No. 51495 2/6/23 Table of Contents Section Title Project Narrative 2 Pipe and Inlet Computations Virginia Runoff Reduction Method Worksheet Summary 4 Pre -Developed HydroCAD Calculations 5 Post -Developed HydroCAD Calculations 6 Channel Analysis 7 Nutrient Credit Availability Letter Project Narrative: This project includes the establishment of three parcels and the development of two of the three parcels. Work associated with the two developed parcels under this plan consist of the construction of a hotel, a mini storage facility, required parking lots, and associated site features. The third lot will be graded but remain undeveloped at this time. The third lot, slated for future development, has an assumed impervious area accounted for in the water quantity calculations, but not the water quality calculations. Future improvements on the undeveloped lot will need to handle water quality independently. Also, a future shared use path is anticipated along Berkmar Drive. Impervious area associated with a 10' wide impervious path within the drainage area to the regional facility has been accounted for in water quantity calculations, while impervious area associated with the path along the entire frontage has been included in the water quality calculations. The majority of the site drains to an existing dry detention basin, County SWM facility ID 0021.01, which is located downhill and to the south of the site, between the bowling alley and Lowes home improvement store. This SWM facility will be used for stormwater quantity measurements and is within Deed of Easement (established right of County to Maintain), DB-PG: 1786-0734. For more information, please see County of Albemarle Deed of Easement with Keglers of Charlottesville, and Detention Pond Easement Plat, DB-PG: 1786-0737; plat by Wiley and Wilson, Lynchburg, April 15, 1994. Plan approval date of the facility is 11/19/87. Albemarle SWM facility database states existing dry detention basin watershed is 61.87 Ac. with 21.37 Ac. impervious; these values have been updated for use in our calculations based on a review of approved plans, GIS information, and site visits. The facility is listed in county SWM database (co - owned by) Keglers of Charlottesville and Lowes Investment Corp 4341. Water Quality Compliance: The disturbed area of 5.47 acres was used for water quality analysis. In the existing condition, there are 0.35 acres of impervious area associated with a gravel/paved access road, while the rest of the site is assumed forested. In the proposed conditions there will be 2.58 acres of managed turf and 2.89 acres of impervious. These values include the impervious area associated with the shared use path, but not development associated with the third platted parcel. The required phosphorus removal for the work shown on these plans is 5.19 lb/yr. The requirement will be satisfied with the purchase of credits from an offsite nutrient bank. Water Quantity Compliance: This majority of the project area currently drains to the offsite SWM facility ID 0021.01. Utilizing a combination of approved plans, survey data, GIS, and site visits, the drainage areas were determined for analysis. Notes on the drainage area maps indicate where specific information was obtained from approved plans. Information for drainage areas at the SPCA and Berkmar Overlook were pulled directly from approved plans since they drain to upstream stormwater management facilities. Other areas within the overall watershed were based on compiling best available information and engineering judgement. The SWM facility was modeled utilizing SCS 24-hr methodology. In the existing condition, runoff from upstream developments discharge onto the site from culverts under Berkmar Drive, continue across the site in open channels, and connect to an existing well-defined channel between the Keglers bowling alley site and Harvest Moon Catering. This channel appears to have been created, or at least modified, by fill slopes associated with the Keglers development. In the current condition, the channel is eroded. This channel continues into the floor of the SWM facility all the way to the outlet structure. The post -developed drainage follows a similar pattern, though runoff is piped through the property before discharging at the same point at the beginning of the channel behind Keglers. The project will require compliance with flood protection and channel protection regulations. Due to the downstream conditions and drainage areas, channel protection is required to be met through energy balance and flood protection through releasing the 10-year storm below pre -developed flow rates. Improvements to the existing SWM facility are proposed to satisfy all water quality requirements. Two small areas within the limits of disturbance do not flow into the regional basin. There is a very small drainage area in the northwest comer of the property which flows onto Berkmar Drive and to the north. Flows associated with this area will remain unchanged as no impervious area is being added with this project. Impervious area added with the shared use path may require further evaluation. The other piece of the limits which does not drain to the regional facility is within the shared right-of-way to the north of Schewels. This area will drain along a concrete curb and gutter, into a new inlet, and be piped to the existing storm sewer system along Route 29. This storm sewer system ultimately ties into the storm system downstream of the regional basin outlet. For channel protection, the first analysis was conducted within the channel between the piped discharge and the SWM facility. The existing channel shows signs of erosion and therefore requires improvement. Riprap lining has been added and shown to convey the 2-year storm without erosion. Ultimately, compliance with the energy balance equation is required due to downstream system entering a natural channel prior to the project area being over 100 times the size of the drainage area. The energy balance equation was applied to the entire limits of disturbance, 5.47 acres. This area is entered into the routing program as Node 0 for reference. The resulting 1-yr peak flow and volume numbers from the limits were used in the energy balance equation to determine a required reduction in flow for the SWM facility outfall in the post -developed condition. The energy balance equation results in an allowable flow for the limits of disturbance of 0.27 cfs. The target flow rate from the SWM facility for the 1-yr storm was determined by removing the pre -developed 1-yr peak flow rate for the onsite area and adding the allowable 1-yr peak flow rate for the post -developed condition. Improvements to the SWM outlet structure result in a reduced flow rate to meet the required reduction. Note: The orifice size remains as 18". However, due to filling in the small low point around the existing outlet and raising the invert of the orifice, there is substantially less head during the 1-year storm. Therefore, the same size orifice results in a lower flow. Energy balance calculations are summarized below. OUTFALL CHANNEL PROTECTION AND FLOOD PROTECTION CALCULATIONS CHANNEL PROTECTION (ENERGY BAL\ANCE)-1 YRFORONSITE AREAS QIYRPOST-DEVALLOW - IF t (QI YRPRE-DEV f RV1 YRPRE-DEVI/RVIYRPOST-DEV 0.800 *( 1.53 ` 0.17 )/ 0.76 0.27 CFS APPLYING Q1 YRPOs-DEY W TO THE POND ROUTING: QIYRPONDALLOW - Q1YR PRE-DEV POND - QIYRPRE-DEV 0N51TE+ Q1YR POST-DEV ALLOW 29.95 - 1.53 + 0.27 28.69 CFS 27.61 CFS 5 28.69 CFS For flood protection, the proposed on -site storm sewer system and the improvements to the channel between the site and the basin were designed to contain the 10-year, 24-hour storm. Due to capacity limits and potential flooding concerns of downstream properties, the 10-year flow out of the basin cannot be increased. Improvements to the outfall structure keep the post -developed 10-year storm below the pre -developed condition. Therefore, flood protection requirements are satisfied. FLOOD PROTECTION-10 YR Q10YRPOST-DEVPOND = Q10YRPRE-DEVPOND 113.35 CFS <- 114.06 CFS Improvements to the SWM outlets cause an increase in the overall water surface elevations of the 100-year storm. The water surface elevation is increased from 477.13' to 478.14'. The existing top of berm has a low point of approximately 479.5', which results in less than two feet of freeboard. Therefore, improvements to the berm are proposed to raise the top of berm to a minimum elevation of 480.25'. These improvements will be made in accordance with recommendations from a geotechnical engineer. Note: These improvements, along with filling the low point within the facility, result in a slightly reduced capacity of the facility. The volume of the basin has been adjusted accordingly in the calculations. PEAK FLOW ANALYSIS DRAINAGE AREA NAME TOTALAREA (AC) Tc (MIN) CN PEAK FLOW RATE (CFS) I YR 10 YR 1-YR RUNOFF VOLUME (AC-M Pre -Developed Drainage Areas: (1S) Lowes+ ChickfilA(Combination DA) Lowes SDP-1995-00087 Chick-fil-a SDP-2020-00006 (2S)Keglers SDP-1987-00071 (4S) Berkmar Overlook DA B to Pond (11P) (5S) West Berkmar Inlets (6S) Pre Developed Onsite Drainage Area (7S) Ex. Dev. to West (Combination DA) Woodbrook Crossing SDP-1998-00079 Loupe Terrace Phase 1 & 25PD2008-00094 UVA Credit Union SDP-1996-00089 Road Runoff (8S) SPCA to SWM A(SOP) (SOS) SPCA to SWM B (913) (11S) SPCA to 0( BIO (213) (12S) SPCA Area 4- Upstream (13S) SPCA to EX SWM (14S) Open Space around Facility (17S) Child Development (FDCD) into pipe (18S) Harvest Moon & Upstream (Combination DA) Harvest Moon WPO-2016-00011 Child Development Center SDP-2004-00010 16.30 6.0 93 62.02 122.41 3.071 4.55 6.0 91 16.26 33.27 0.788 7.43 7.2 79 15.20 40.64 0.739 0.77 6.0 71 1.02 3.45 0.049 4.86 16.7 59 0.95 8.44 0.123 9.79 8.0 83 23.65 57.50 1.184 0.93 6.0 81 2.20 5.58 0.102 0.42 6.0 94 1.64 3.19 0.082 0.43 6.0 58 0.18 1.21 0.012 12.43 8.0 58 3.14 28.75 0.286 2.31 8.0 81 5.07 12.93 0.254 5.25 6.0 57 0.93 11.71 0.097 0.28 6.0 98 1.19 2.19 0.065 3.75 7.5 80 7.98 20.83 0.392 (7P) ROUTED PRE DEVELOPMENT FLOW AT OUTFALL 29.95 114.06 Post -Developed Drainage Areas: (only DAs that differ from pre listed here) (6S) Post Developed Onsite Drainage Area (18S) Combination Drainage area 4.95 9.6 86 13.08 29.80 0.688 3.67 7.5 82 8.61 21.41 0.423 (7P) ROUTED POST DEVELOPMENT FLOW AT OUTFALL 27.61 113.35 PEAK FLOW RATE 1-YR TOTALAREA Tc (CFS) RUNOFF LIMnSOFDISTURBANCE (AC) (MIN) CN VOLUME IYR 10 YR (AC -FT) (0)LOD- Pre Developed for EB 5.47 16.7 58 1.53 10.66 0.167 (0)LOD- Post Developed for EB 5.47 9.6 86 14.24 32.47 0.76 FORM ID 201 STORMWATER INLET COMPUTATIONS SHEET OF ROUTE PROJECT Bakme W$TaaB2 OESIONER: C.Bdlm OATS 2f =3 CHECKED: C. B9Nm UNITS ENGUSH �mm�mmmoomm��®momommmmmmmmmmmmm��m �mm�mmmmmmm®®mmmmmmmmmmmommmmmmm®�m� ��m�mm®mmmmmmmmmmmmmmmmmmmmmmmmm��m� �mm�mm®®®mm��®mm��m®®m�mmmmm®mm��m� ®�m�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m� �mm�mmmmoomm®�mm���mm�mmmmmmmmmm��m� ®�m�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m� �mm�mmmm®mmm��mm���m®gym®mmmm�®mm��m� ��m�mm®mmmmmmmmmmmmmmmmmmmmmmmmm��m� �mm�mmm®®momm�®m���m®��mmmmmmmmm��m� ®®mom®�mmmmmmmmmmmmmmmmmmmmmmmmm��m �mm�mmm®®omm�®mm�mmmmmmmmmmmmmm��m �mm�mmmmmmm®mmmmmmmmmmmmomm®m®m®mt�m� ®�m�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m �mm�mmmm®momm�®mm�mm®mmmmmmmmmmm��m �mm�mmmmmmm®mmmmmmmmmmmmommmm®mmmt�m� �®m�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m �mm�mm®®mom®�mm��®mmmmmmmmmmmmm��m �mm�mmmmmmmm®mmmmmmmmmmmommmm®mmmt®®� �®m�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m� �mm®mmmm®mom��mm�m�mmm��mmm®mmmm��m� ®®®�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m �mm�mmmmmmom®�mmm�ommmmmmmmmmmmm��m �mm�mmmo®oommmmmmmmmmmmmmmmmmmmm��m �mm�mmmmmmm®mmmmmmmmmmmm®mmmmmmm®�m� �®m�®®�mmmmmmmmmmmmmmmmmmmmmmmmm��m� �mm�mmmm®mo®®�mmomomm��®m�mmmmmm��m� �®m�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m �mm�mmm®momm�mm®�mmmmmmmmmmmmmm��m �mm�mmmo®oommmmmmmmmmmmmmmmmmmmm��m �mm�mmmmmmm®®mmmmmmmmmmm®mmmmmmm��m� ®�m�mm®mmmmmmmmmmmmmmmmmmmmmmmmm��m� �mm®mmmm®®o®m�mmm�®m®���mmmmm®mm��m� INLETSOFT BY ENSOFTEC DATE :2 nOn FORM ID 2O4 STORMWATER INLET COMPUTATIONS SHEEf2OF2 ROUTE PROJECT �WSWI,,e OESIONER: C. Bdlm OATS 2f =3 CHECKED: C. B9Nm UNITS ENGUSH INLET S Inleb Onl 3W OI-3B B000 0.W I ,Sf 02856 tlRIGHi I I I 1 0286 1 5W2 1 1"2 1 0 1 1442 1 00100 I 00208 1 642C 1 2" 10 3113 100833 14 GAS 1 0]8] 1 350 10 1458 10.1356 1 7 2" 1 80.'U1 IIN I 1000 1 1"2 1 0O}I 1 3103 INLETSOFT BY ENSOFTEC DATE: 2/]12U23 BERKMAR STORM STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 70 PROJECT: Berkmar Self Storage LOCATION: COUNTY: Albemarle UNITS ENGLIBX PIPE NO FROM POINT TO POINT DRAM, AREA RUNOFF COEFF. "C" (4) CA TOTAL INLET TIME MWnten (7) RAM FALL 1 H' (8) RUNOFF Q CFS (9) INVERT ELEVATIONS LENGTH of Pipe FL (12) SLOPE Ft/Ft. (13) SIZE (Da. Or SpnNRise) In (14) SHAPE Capacity CFS (15) Fncnon Slope FUFt. VEL V. FVSec (16) FLOW TIME Min. (17) REMARKS (I8) MCI MENT (5) ADDTL CA ACCUM- ULATED (6) UPPER END (10) LOWER END (11) REFERENCE (1) STA. REFERENCE (2) STA. "A' Acre (3) 163 1" 16+50.69 162 1638.35 01% (LW 0084 0.171 0255 9750 5526 1K)7 509180 508750 42956 0010 12M C.W. 3.858 0001 4537 0.158 Wc1. RnnfdOn. 161 162 1638.35 132 16+0806 0010 0740 0007 0000 0262 8.908 5A91 1439 508.650 508 N7 303W 0.010 1E000 Circular 3.858 0001 4564 0.111 133 134 132 0.000 0M 0W0 0.120 0.120 6W0 6230 0.745 Son 7% 506.509 28063 0010 8000 C.W. L308 0.003 3879 0121 RoofinO. to So- 131 132 16+0806 114 16+06.71 0000 0000 0000 0000 0382 9018 5467 2086 506.000 505.190 40.517 0020 ISM O.W. 98% OWI 6W3 0105 117 118 116 0,250 0,770 0.193 OWO 0,193 0000 8901 1713 514.OW 513390 60.968 0010 15" Circular 6996 ONI 4M 0215 115 116 17+(652 114 16r0671 O0W 0000 0000 3.358 3550 7200 5.898 20941 510210 5W 528 96.815 0.100 24M O.W. T1.490 0007 20.9% 0077 i.1 WP0201900050 113 114 16+06.71 112 14+6541 0170 0890 0.151 0000 4083 9.124 5444 22.229 SWAN 498452 141293 0014 24W0 C.War 289% 0008 10.195 0231 129 130 11+21.76 112 10+8978 06W 0840 0554 0000 0554 0.000 8901 4935 4"753 499433 31985 0,010 ISM Circular 69% 00D5 6.193 0,086 111 112 14+6541 Ito 13M5.92 0240 0860 0206 0000 4,M4 6.SW 6087 294M 498.350 491,750 119497 0055 24M C.W. 57598 0014 18478 0108 127 128 13M592 Ito 13+4592 0820 0810 0lSN 0000 0664 OOUO 8901 5912 4%110 4%480 24347 0067 19" Circular 29438 0003 13 N9 0031 109 Ito 13+4592 108 12+0954 0000 0.000 0000 0000 5508 6608 6057 33362 4%750 489.386 136380 0010 36000 Circular M157 0002 10039 0226 107 108 12+0954 106 11M789 0280 0900 0252 0000 5760 6.834 5995 34533 4892% 497.749 61 N8 0.025 360W Circular 114249 0002 14.185 0072 125 126 12+8634 124 12M7.81 0150 0390 0.119 0000 0.119 0000 89m 1055 4W 082 495750 38527 0OM ISM C.ula 20.575 0000 8821 0073 123 124 12+4781 in 12+W.00 0" JIM 0m 0000 0,119 003 8.852 1049 491250 4%,V2 47,813 0.010 ISM Circular 69% 0" 4.109 0.1% 121 in 11M789 120 11M789 0450 01520 0279 0252 0.650 8250 5.640 3W3 490670 489.670 999" 0.010 ISM C.W. 69% 0003 5,780 0288 .1llnnfdrvn 119 120 11+4789 106 11M7.89 00% 0710 0064 0" 0713 9538 5573 3W6 489570 487570 99999 0020 ISM Circular 98% 0003 7639 0218 105 106 1m 0ow 0.800 0072 0216 6762 8757 5524 37353 487250 483048 52521 0080 36000 Circular 204.375 000E 22N7 0NO .1 Rnof&.. 103 1N 102 0" 0" 0" 0" 6.762 8.796 5.515 37293 481057 490710 3472E 0010 36M O.W. M257 000E 10.32A 0056 lot 102 10t6064 100 10(K)OO 0140 0840 0.118 0216 7095 8.852 5503 39N5 480606 480000 60.645 0010 36W CVeWar MZ7 000E 10442 0097 Wc1. Roofdnu. 203 2N 12+3937 202 11+9409 OW 0" 02P2 0000 0272 0000 5920 1610 479.300 475.878 45278 0,090 ISM Crcular 19788 0001 9727 0078 201 202 11N4.09 200 10M000 0000 0000 0000 0000 0272 0078 5920 1610 475639 WHO 19 ON 0080 ISM C.W. 19788 0.001 9727 0333 BERKMAR STORM PROJECT: Berlanar Self Storage HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY 10 Year INLET OR JUNCTION INLET STATION OUTLET WATER SURFACE EUWV DIA PIPE Do on) DESIGN DISCH. po (CFS) LENGTH PIPE L. (Fo FRICTION SLOPE. SW (FTIFT) FRICTION LOSS HI (Fo JUNCTION LO$ FINAL H (Ft) INet W r Sums EI.Ii. RYn Ekv CmnMnlS Vo Ho (Fo OI M OM MP g HI MP, HA HI 13 HI 0.5 HI 102 482.40 36 39.05 60.64 0.0029 0.18 10.44 0.42 37.29 10.32 385.02 1.66 0.58 53.05 0.83 1.83 0 TRUE 1.09 483.49 487.20 OK -3.71 104 10+95.37 483.49 36 37.29 34.]2 0.0027 0.09 10.32 0.41 37.35 22.05 823.52 7.55 2.54 37.11 3.25 6.30 0 TRUE 3.24 486.]4 488.28 OK -1.55 106 11+4].89 486.74 36 37.35 52.52 0.0027 0.14 22.05 1.89 34.53 14.19 489.85 3.12 1.09 57.18 1.75 4.73 0 TRUE 2.51 489.24 495.16 OK -5.92 108 12+09.54 490.15 36 34.53 61.65 0.0023 0.14 14.19 0.78 33.36 10.04 334.92 1.56 0.55 32.26 0.55 1.88 0 TRUE 1.08 491.23 497.05 OK -5.82 110 13+45.92 491.79 36 33.36 136.38 0.0021 0.29 10.04 0.39 29.48 18.48 544.82 5.30 1.86 81.94 3.71 5.96 0 TRUE 3.27 495.06 502.11 OK -7.05 112 14a65.41 495.06 24 29.48 119.50 0.0145 1.73 18.48 1.33 22.23 10.20 226.63 1.61 0.56 90.55 1.13 3.02 0 TRUE 3.24 498.30 506.53 OK -8.23 114 16+06.]i 500.05 24 22.23 141.1 0.0082 1.16 10.20 0.40 20.94 20.99 439.63 6.84 2.40 3.54 0.00 2.80 0 TRUE 2.56 502.61 512.65 OK -10.03 132 10+40.52 506.19 15 2.09 40 521 0.0009 1 0.04 6.40 0.16 1.44 4.56 6.5] 0.32 0.11 89.96 0.23 0.50 0 TRUE 0.29 506.48 513.61 OK -].13 162 10+70.83 509.15 12 1.44 30.31 0.0014 ON 4.% 0.D8 1.41 4.54 6.38 0.32 0.11 ]5.19 0.21 0.40 0 TRUE 0.24 509.39 515.93 OK b.59 164 11+13.78 509.55 1 12 1 1.41 1 42.96 1 0.0013 1 0.06 4.54 0.08 0.00 0.00 0.00 1 0.00 0.00 0.00 1 0.00 i 0.08 0.1038] TRUE 0.11 509.66 514.00 OK 4.34 120 489.24 15100.00 0.0032 0.32 ].64 0.23 3.66 5.]8 21.1] 0.52 0.18 0.00 0.00 0.41 0 TRUE 0.53 489.]] 495.16 OK -5.4 122 12+00.00 490.6] 15 ZI 6 100.00 0.002] 0.2] Sl8 0.13 1.05 4.11 4.31 0.26 0.09 36.56 0.11 0.33 0.43936 TRUE 0.49 491.1fi 495.16 OK 4 124 1 491.] 1 15 1.05 47.81 0.0002 1 0.01 4.11 0.07 1 1.05 1 8.82 9.30 1 1.21 1 0.42 1 12.97 0.23 1 0.72 1 0 1 TRUE 1 0.37 1 492.141 499.40 1 OK -7.25 126 12+86.39 1 496.75 1 15 1 1.05 1 38.531 0.0002 1 0.01 1 8.82 1 0.30 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.30 1 0.3927 TRUE 1 0.21 1 496.961 510.17 1 OK -13.21 128 1 10+24.35 1 495.68 1 18 1 5.91 124.35 1 0.0027 1 0.07 1 13.05 1 0.66 I 0A0 I 0.00 I 0.00 I 0.00 I 0.00 I 0.00 I 0.00 I 0.66 10.859321 TRUE 1 0.50 1496.18 1 500.50 1 OK 4.32 130 1 10+31.98 1 500.43 1 15 1 4.93 1 31.98 1 0.0050 1 0.16 1 6.19 1 0.15 1 0.00 1 0.00 1 0.D0 1 0.00 1 0.00 1 0.00 1 0.00 1 0.15 10.193541 TRUE 1 0.26 1500.69 1 506.83 1 OK b.i4 116 17+03.52 502.61 24 20.94 96.81 0.0073 0.71 20.99 1.71 1.71 4.72 8.09 0.35 0.12 78.99 1 0.23 1 2.06 1 0 1 TRUE 1 1.74 1 504.35 1 517.63 1 OK -13.28 118 11+64.49 514.39 15 1.71 60.97 0.0006 ON 4.72 0.09 0.00 0.00 0.00 0.00 0.00 0.00 1 0.00 1 0.09 10.112521 FALSE 1 0.15 1 514.54 1 518.86 1 OK 4.32 134 10+28.06 507.04 8 0.75 128.06 1 0.0032 1 0.09 1 3.88 1 0.06 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.06 1 0 1 TRUE 1 0.12 1507.16 1 511.42 1 OK 4.26 202 11+94.09 461.11 15 1.61 1194.091 0.0005 1 0.10 1 9.73 1 0.37 1 1.61 1 9.73 1 15.66 1 1.47 1 0.51 1 11.46 1 0.17 1 1.05 1 0 1 TRUE 1 0.B3 1 461.74 1 479.75 1 OK -18.01 204 12+39.37 476.88 15 1.61 1 45.28 1 0.0005 1 0.02 1 9.73 1 0.37 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.00 1 0.37 10.4T451 FALSE 1 0.50 1 4]].38 1 483.37 1 OK -5.99 OEQ Vi,9inu RumfjRNuefian MCMaO Re-0evebpnenf [arpllan[eSpenMM1ear - Veisbn 3.0 DI9..RM.s,artl.as.a s.euwNmr. om.e.ove9M.Mentlemseaspednmslem rvekewme: 9erYma,sengorye ® am xo-nam vwAN unea, Deeelnumem Pv_? un - Iwaer� Site Information Post -Development Project (Treatment Volume and Loads) Enter Total Disturbed PreAeoeidame,R land cover Is,eesl Area (acres) j 54) CheN: Q � BMI MsignS er1 [o4'anitisf. ]013 QraX sttls65pec[ !made Pmjndsi V In,am.eeoayenremm ama,W) Tolaltlkluebetlmm enreeem ✓ rvowr iwe.m,,.N—ewmrce smrarm .unlemeq-eiwreee.nwmx eerro..eume Irwadmscaarlad Pe.uselo ra.l necamer Na. rnre,yolen v-lxe,l-memwal ninnassetrnlamis�wreee.g a. aem�ve owrcl umx em,ermxl c-a Yeece. A. [namanto Ronan L..... s(Rr ulixnn) rcmisevl rwmprmspxeam wl see--RolwelMI laausmfart m¢mlmisuclmWl0 us r11� � mmn arc, ammo aw arc, ammo a eenopmem P..'esu'rarr-srve c- lenses we�l_:Pd mrevV n meal-e�l I- w.peee NyuT ..,u do R.mlenm ass xe cerm.u, zm rt.r leoe:l i.ec wr amleoeV mwr NI-P.-cll Ni-Pwi.u,l nes szx }e i�m(x,ulw seedsKK ure.sueuwryaen(Fep no..m e,, mµn a` xeelrwxdvry re'aVerremxeso I.-, s I se rareV0_snm+evm wvpwspvml wapree ral-I suvBvr:l V 0. rorvseirt[mer weismm metevp o.re an wgnvinleepV wr.�m swVic Ve Nm..- mrmioucwvlve,l 0v 035 sce—ccsyoxl 1A nnim^�1 Mvrrwvm,q a. m.'es.. see meyevey are.InW L) m Tentative olume and Nutrient Land Treatment Volume and Nutrient LoW ea,,x,ep� � omm Y a _ rve"..fis V,,me a_Son e sek...." Imelnl a.ID IieryV• = ev ozoul R1�xre�to tree , nwveluAr a.ect eN _ deMllypl A 59 ranoe.ny.rr..rrrrenm..rv.i.rr. Imetil nwm nmrr va�rr.m prenl ume nnsz or o2-seonn.ImlexNm l>m lay anMa rrem lewlrmxlme vmel. weneon.WpnnrtrvuM Iwnl 1.11 0.93 wlvu pment b Icmd a neu vmdr ••o• nm ns oel.ablerc iz 'rut, PaSWW ma aekrc.eMmemwnemrc�m,n.,eerv,m„gnew.er(/ore,Vwenwoaormvnwee nrm a.. ,a •w .cr...,mwr,+.mw.er. mr.,m w,r..oe.ewmm,wrewermm���wm etlaA'"0.]3 ruerra xeWetllnrww vnrevbe ueelwvV 4G6 ,mw..w:.,xl. :,:..:>....r.,;: reeve„Mreo,r,emem>drc.ewe,.rcr,wrc,lm,ee..,.e. Post -Development Requirement for Site TP LoatlRMrr[ion PepuirM llb/yr) Nitrogen loads (Informational Purposes men„me nmlmam m,rwwrm Area 5.19 Only) new nemrxlmvpwnl )ev 1-1 awmawrrems Inmwmwtwmr, al:s. rn do.l r Ilse Site Results (Water Quality Compliance) Area Checks D.A.A D.A.B DA.0 DA.D 0.0.E AREIICHECK FOREST/OPEN SPACE (a[) 0.00 aw 0.00 0.00 O.W OK. IMPERVIOUS COVER Ia[I IMPERVIOUS COVERTREATEO Ia[I 0.00 0.00 UOD O.W 0.00 0.00�22. O.m UOD 0WOK. OK. MANAGEDTURFAREA(a[) 0.00 ROD 0.00 O.N OK. MAMGEO TURF AREATREATEO (a[) 0.00 UOD 0.00 ROD OK. ARFACHECK OK OK. OK. OK. Site Treatment Volume (ft') 11,833 Runoff Reduction Volume and TP By Drainage Area D.A. A DA. C DA. D O.A E TOTAL RUNOFF REDUCTION VOLUME ACHIEVED (Fta) 0 0 0 0 0 0 TP LOAD AVAILABLE FOR REMOVAL (Ib/yr) 0.00 0.00 O.N 0.00 TPLOADREOUCTIONACHIEVED (Ib/yr) O.m O.N 0.DO 0.00 0.N ow TP LOAD REMAINING IIb/yr) 0.00 O.W 0.00 0.00 O.N 0.00 NITROGENLOADREOUCTLONACHIEVED IIb/yil 0.00 0.00 0.00 0.00 ROD 0.00 Total Phosphorus FINAL POST -DEVELOPMENT TP LOAD (Ib/yr) 7.43 TP LOAD REDUCTION REQUIRED (Ib/yr) 5.19 TPIDADREOUCTIONACHIEVED (Ib/yr) 0.00 TP LOAD REMAINING Qb/yr): 7.43 REMAINING TP LOAD REDUCTION REQUIRED (Ib/yr): 5.19 Total Nitrogen (For Information Purposes) POST -DEVELOPMENT WAD (Ib/yr) 53.19 NITROGEN LOAD REDUCTON ACHIEVED IIb/yr) 0.00 REMAINING POST -DEVELOPMENT NITROGEN LOAD Ib r 53.19 1S Loves+Chi ckfilA 2S Keglers 6S PRE Berkmar Self Storage VVP0202200032 co) LOD-PRE SPCA AREA TO EX A3P SWM SPCASWM / „$ �PCA AREA TO EX BID 8S 2P SPCA AREA F TO SIIM �Q 10S A EX BIO ACILRV w Q- SPCA AREA H TO SPCA SWIM AS EM SP SWIM BSYSTEM SWMB 01 (CMP DETENT ) 0 (CMP DETENTION) 10L 12S SPCA Area a- P 2201800030 Ex Dev. to West Upsteam Analysis Point /17$ F¢DC into Pipe ,2L �— 15R 4 R11L RR West Berkmar Inlets Com fined Ups am to Open Channel WP020190005Q Facility An Point \ 14S 11 o-� 4S BERKMAR OVERLOOK Berkmar Overlook DA I Open ace around WP0201900050 Facility POND WPO201900050 18S 7P Harvest Moon Upstream EttlsUng SWM Facility Subca Reach and Link PRE_ Developed _Berkmar Prepared by {enter your company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 2 Rainfall Events Listing (selected events) Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 1 year Type II 24-hr Default 24.00 1 3.01 2 2 10 year Type II 24-hr Default 24.00 1 5.50 2 3 100 year Type II 24-hr Default 24.00 1 9.02 2 PRE_ Developed _Berkmar Type 1124-hr 1year Rainta11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HVdroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Paoe 7 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 0: LOD - PRE Runoff Area=5.470 ac 6.40% Impervious Runoff Depth>0.37" Tc=16.7 min CN=61 Runoff=1.53 cfs 0.167 of Subcatchment 1S: Lowes + ChickfilA Runoff Area=16.300 ac 86.87% Impervious Runoff Depth>2.26" Tc=6.0 min CN=93 Runoff=62.02 cfs 3.071 of Subcatchment 2S: Keglers Runoff Area=4.550 ac 80.88% Impervious Runoff Depth>2.08" Tc=6.0 min CN=91 Runoff=16.26 cfs 0.788 of Subcatchment 4S: Berkmar Overlook DA B Runoff Area=7.430 ac 0.00% Impervious Runoff Depth>1.19" Tc=7.2 min CN=79 Runoff=15.20 cfs 0.739 of Subcatchment 5S: West Berkmar Inlets Runoff Area=0.770 ac 27.27% Impervious Runoff Depth>0.76" Tc=6.0 min CN=71 Runoff=1.02 cfs 0.049 of Subcatchment 6S: PRE-Berkmar Self Storage Runoff Area=4.860 ac 7.61 % Impervious Runoff Depth>0.30" Flow Length=627' Tc=16.7 min CN=59 Runoff=0.95 cfs 0.123 of Subcatchment 7S: Ex. Dev. to West Runoff Area=9.790 ac 60.16% Impervious Runoff Depth>1.45" Tc=8.0 min CN=83 Runoff=23.65 cfs 1.184 of Subcatchment 8S: SPCA AREA F TO SWM A Runoff Area=0.930 ac 54.84% Impervious Runoff Depth>1.32" Tc=6.0 min CN=81 Runoff=2.20 cfs 0.102 of Subcatchment 10S: SPCA AREA H TO SWM B Runoff Area=0.420 ac 88.10% Impervious Runoff Depth>2.36" Tc=6.0 min CN=94 Runoff=1.64 cfs 0.082 of Subcatchment 11S: SPCA AREA TO EX BIO Subcatchment 12S: 12S SPCA Area 4 - Subcatchment 13S: SPCA AREA TO EX SWM Runoff Area=0.430 ac 0.00% Impervious Runoff Depth>0.34" Tc=6.0 min CN=60 Runoff=0.18 cfs 0.012 of Runoff Area=12.430 ac 4.59% Impervious Runoff Depth>0.28" Tc=8.0 min CN=58 Runoff=3.14 cfs 0.286 of Runoff Area=2.310 ac 55.41 % Impervious Runoff Depth>1.32" Tc=8.0 min CN=81 Runoff=5.07 cfs 0.254 of Subcatchment 14S: Open Space around Facility Runoff Area=5.250 ac 0.00% Impervious Runoff Depth>0.22" Tc=6.0 min CN=56 Runoff=0.93 cfs 0.097 of Subcatchment 17S: FCDC into Pipe Runoff Area=0.280 ac 100.00% Impervious Runoff Depth>2.78" Tc=6.0 min CN=98 Runoff=1.19 cfs 0.065 of Subcatchment 18S: Harvest Moon + Upstream Runoff Area=3.750 ac 52.00% Impervious Runoff Depth>1.25" Tc=7.5 min CN=80 Runoff=7.98 cfs 0.392 of Reach 15R: Open Channel Avg. Flow Depth=0.12' Max Vet=2.48 fps Inflow=9.25 cfs 0.852 of n=0.035 L=495.0' S=0.0566'/' Capacity=2,103.18 cfs Outflow=8.09 cfs 0.849 of PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 8 Pond 2P: EX BIO FACILITY Peak Elev=512.87' Storage=3,284 cf Inflow=2.75 cfs 0.265 of Outflow=2.38 cfs 0.196 of Pond 3P: SPCA EX SWM Peak Elev=518.94' Storage=0.047 of Inflow=5.07 cfs 0.254 of Outflow=2.66 cfs 0.253 of Pond 7P: Existing SWM Facility Peak Elev=466.74' Storage=65,234 cf Inflow=114.49 cfs 7.170 of Outflow=29.95 cfs 7.170 of Pond 9P: SPCA SWM B SYSTEM 02 (CMP Peak Elev=525.28' Storage=0.027 of Inflow=1.64 cfs 0.082 of Outflow=0.33 cfs 0.082 of Pond 10P: SPCA SWM A SYSTEM 01 (CMP Peak Elev=512.21' Storage=0.032 of Inflow=2.20 cfs 0.102 of Outflow=0.45 cfs 0.102 of Pond 11 P: BERKMAR OVERLOOK POND Peak Elev=523.24' Storage=8,754 cf Inflow=15.20 cfs 0.739 of Outflow=8.34 cfs 0.738 of Link 10L: WP0201800030 Analysis Point Inflow=27.02 cfs 1.851 of Primary=27.02 cfs 1.851 of Link 11L: WP0201900050 Analysis Point Inflow=9.25 cfs 0.852 of Primary=9.25 cfs 0.852 of Link 12L: Combined Upstream to Facility Inflow=113.83 cfs 7.073 of Primary=113.83 cfs 7.073 of Total Runoff Area = 74.970 ac Runoff Volume = 7.410 of Average Runoff Depth = 1.19" 60.49% Pervious = 45.350 ac 39.51 % Impervious = 29.620 ac PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 0: LOD - PRE Runoff = 1.53 cfs @ 12.14 hrs, Volume= 0.167 af, Depth> 0.37" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 5.120 58 Woods/grass comb., Good, HSG B 0.350 98 Paved parking, HSG B 5.470 61 Weighted Average 5.120 93.60% Pervious Area 0.350 6.40% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.7 Direct Entry, Subcatchment 0: LOD - PRE Hydrograph Type II 24-hr 1 year Rainfall=3.01" Runoff Area=5.470 ac Runoff Volume=0.167 of Runoff Depth>0.37" Tc=16.7 min CN=61 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment 1S: Lowes + ChickfilA Runoff = 62.02 cfs @ 11.97 hrs, Volume= 3.071 af, Depth> 2.26" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 14.160 98 Paved parking, HSG B 2.140 61 >75% Grass cover, Good, HSG B 16.300 93 Weighted Average 2.140 13.13% Pervious Area 14.160 86.87% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment 1S: Lowes + ChickfilA Hydrograph ❑ Runoff _......... 62.02 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=16.300 ac RunoffVolume=3.071 of Runoff Depth>2.26" Tc=6.0 min CN=93 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 29 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 2S: Keglers Runoff = 16.26 cfs @ 11.97 hrs, Volume= 0.788 af, Depth> 2.08" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 3.680 98 Paved parking, HSG B 0.870 61 >75% Grass cover, Good, HSG B 4.550 91 Weighted Average 0.870 19.12% Pervious Area 3.680 80.88% Impervious Area Tc Length Capacity Description Direct Entry, Subcatchment 2S: Keglers Hydrograph Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Runoff = 15.20 cfs @ 11.99 hrs, Volume= 0.739 af, Depth> 1.19" Routed to Pond 11P : BERKMAR OVERLOOK POND WP0201900050 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 7.430 79 Approved plan. Fully built. 7.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description i..\ If--+% /ff/ff\ (f+10 _N 1-fo\ 7.2 Direct Entry, Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Hydrograph C S Type II 24-hr 1 year Rainfall=3.01" Runoff Area=7.430 ac Runoff Volume=0.739 of Runoff Depth>1.19" ....... ........... ....... <....Tc=7.2 min 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment SS: West Berkmar Inlets Runoff = 1.02 cfs @ 11.98 hrs, Volume= 0.049 af, Depth> 0.76" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.210 98 Paved parking, HSG B 0.560 61 >75% Grass cover, Good, HSG B 0.770 71 Weighted Average 0.560 72.73% Pervious Area 0.210 27.27% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment SS: West Berkmar Inlets Hydrograph 1.02 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=0.770 ac Runoff Volume=0.049 of Runoff Depth>0.76" LL Tc=6.0 min CN=71 0 1 2 3 4 5 6 7 S 9 10 11 12 13 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 14 Summary for Subcatchment 6S: PRE_Berkmar Self Storage WPO202200032 Runoff = 0.95 cfs @ 12.15 hrs, Volume= 0.123 af, Depth> 0.30" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.430 61 >75% Grass cover, Good, HSG B 4.060 55 Woods, Good, HSG B 4.860 59 Weighted Average 4.490 92.39% Pervious Area 0.370 7.61 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.0 100 0.0900 0.15 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.64" 2.0 167 0.0814 1.43 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.7 360 0.0527 1.64 131.20 Channel Flow, Area= 80.0 sf Perim= 30.0' r= 2.67' n= 0.400 16.7 627 Total Subcatchment 6S: PRE_Berkmar Self Storage WPO202200032 Hydrograph ❑Runoff 0.95 cfs Type II 24-hr ff 1 year Rainfall=3.01" Runoff Area=4.860 ac Runoff Volume=0.123 of Runoff Depth>0.30" Flow Length=627' Tc=16.7 min CN=59 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment 7S: Ex. Dev. to West Runoff = 23.65 cfs @ 12.00 hrs, Volume= 1.184 af, Depth> 1.45" Routed to Link 10L : WPO201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Descri 2.890 61 >75% Grass cover, Good, HSG B 1.010 55 Woods, Good, HSG B 5.890 98 Paved parking, HSG B 9.790 83 Weighted Average 3.900 39.84% Pervious Area 5.890 60.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 7S: Ex. Dev. to West Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 16 Summary for Subcatchment 8S: SPCA AREA F TO SWM A Runoff = 2.20 cfs @ 11.98 hrs, Volume= 0.102 af, Depth> 1.32" Routed to Pond 10P : SPCA SWM A SYSTEM 01 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.510 98 Paved parking, HSG B 0.420 61 >75% Grass cover, Good, HSG B 0.930 81 Weighted Average 0.420 45.16% Pervious Area 0.510 54.84% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, 1 Subcatchment 8S: SPCA AREA F TO SWM A Hydrograph 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Time (hours) 24 ❑ Runoff PRE_ Developed _Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 17 Summary for Subcatchment 10S: SPCA AREA H TO SWM B Runoff = 1.64 cfs @ 11.97 hrs, Volume= 0.082 af, Depth> 2.36" Routed to Pond 9P : SPCA SWM B SYSTEM 02 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.050 61 >75% Grass cover, Good, HSG B 0.420 94 Weighted Average 0.050 11.90% Pervious Area 0.370 88.10% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment 10S: SPCA AREA H TO SWM B Hydrograph ❑Runoff 1.64 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=0.420 ac Runoff Volume=0.082 of Runoff Depth>2.36" Tc=6.0 min CN=94 0- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2 „2 , .4 2 3 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 18 Summary for Subcatchment 11S: SPCA AREA TO EX BIO Runoff = 0.18 cfs @ 12.00 hrs, Volume= 0.012 af, Depth> 0.34" Routed to Pond 2P : FCC BIO FACILITY Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.250 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.430 60 Weighted Average 0.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 6.0 Direct Entry, Subcatchment 11S: SPCA AREA TO EX BIO Hydrograph ■ Runoff Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 19 Summary for Subcatchment 12S: 12S SPCA Area 4 - Upstream Runoff = 3.14 cfs @ 12.04 hrs, Volume= 0.286 af, Depth> 0.28" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.570 98 Paved parking, HSG B 1.290 61 >75% Grass cover, Good, HSG B 10.570 55 Woods, Good, HSG B 12.430 58 Weighted Average 11.860 95.41 % Pervious Area 0.570 4.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 12S: 12S SPCA Area 4 - Upstream Hydrograph 3.14 cfs 3- Type II 24-hr 1 year Rainfall=3.01" Runoff Area=12.430 ac Runoff Volume=0.286 of 2-Runoff Depth>0.28" Tc=8.0 min CN=58 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 20 Summary for Subcatchment 13S: SPCA AREA TO EX SWM Runoff = 5.07 cfs @ 12.00 hrs, Volume= 0.254 af, Depth> 1.32" Routed to Pond 3P : SPCA EX SWM Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 1.280 98 Paved parking, HSG B 0.890 61 >75% Grass cover, Good, HSG B 0.140 58 Woods/grass comb., Good, HSG B 2.310 81 Weighted Average 1.030 44.59% Pervious Area 1.280 55.41 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 13S: SPCA AREA TO EX SWM Hydrograph '. '. ❑Runoff _....... 5.07 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=2.310 ac Runoff Volume=0.254 of 3- I Runoff Depth>1.32" Tc=8.0 min 2=1 I I) CN=81 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type I/ 24-hr 1 year Rainfall=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 21 Summary for Subcatchment US: Open Space around Facility Runoff = 0.93 cfs @ 12.02 hrs, Volume= 0.097 af, Depth> 0.22" Routed to Pond 7P : Existing SWIM Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 1.310 61 >75% Grass cover, Good, HSG B 3.940 55 Woods, Good, HSG B 5.250 56 Weighted Average 5.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 14S: Open Space around Facility Hydrograph 0.9 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=5.250 ac Runoff Volume=0.097 of Runoff Depth>0.22' Tc=6.0 min CN=56 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 22 Summary for Subcatchment 17S: FCDC into Pipe Runoff = 1.19 cfs @ 11.97 hrs, Volume= 0.065 af, Depth> 2.78" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.280 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.280 98 Weighted Average 0.280 100.00% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 17S: FCDC into Pipe Hydrograph ❑ Runoff 1.19 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=0.280 ac Runoff Volume=0.065 of Rrrnnff nanfh57 7R" Tc=6.0 min I I U CN=98 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 23 Summary for Subcatchment 18S: Harvest Moon + Upstream Runoff = 7.98 cfs @ 11.99 hrs, Volume= 0.392 af, Depth> 1.25" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 1.950 98 Paved parking, HSG B 1.800 61 >75% Grass cover, Good, HSG B 3.750 80 Weighted Average 1.800 48.00% Pervious Area 1.950 52.00% Impervious Area Tc Length 7.5 Capacity Description /-fa % Direct Entry, Subcatchment 18S: Harvest Moon + Upstream Hydrograph 7.98 cfs 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 24 Summary for Reach 15R: Open Channel Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 1.21" for 1 year event Inflow = 9.25 cfs @ 12.07 hrs, Volume= 0.852 of Outflow = 8.09 cfs @ 12.16 hrs, Volume= 0.849 af, Atten= 13%, Lag= 5.4 min Routed to Link 12L : Combined Upstream to Facility Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Max. Velocity= 2.48 fps, Min. Travel Time= 3.3 min Avg. Velocity = 1.13 fps, Avg. Travel Time= 7.3 min Peak Storage= 1,618 cf @ 12.11 hrs Average Depth at Peak Storage= 0.12' , Surface Width= 27.16' Bank -Full Depth= 3.50' Flow Area= 102.5 sf, Capacity= 2,103.18 cfs 27.00' x 3.50' deep channel, n= 0.035 Earth, dense weeds Side Slope Z-value= 0.6 0.7 7' Top Width= 31.55' Length= 495.0' Slope= 0.0566 T Inlet Invert= 512.00', Outlet Invert= 484.00' Reach 15R: Open Channel Hydrograph Inflow - - ■Inflow F9.25 cfs - - - ■ Outflow Area=8.480 ac Avg. Flow Depth=OC Max Vet=2.48 fps n=0.035 bJ I__L=495.0' rE 5I ,'I S=0.0566 '/' Capacity=2,103.18 11 12 13 14 15 16 17 18 19 20 21 22 23 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 25 Summary for Pond 2P: EX BIO FACILITY Inflow Area = 2.740 ac, 46.72% Impervious, Inflow Depth > 1.16" for 1 year event Inflow = 2.75 cfs @ 12.08 hrs, Volume= 0.265 of Outflow = 2.38 cfs @ 12.23 hrs, Volume= 0.196 af, Atten= 13%, Lag= 8.8 min Primary = 2.38 cfs @ 12.23 hrs, Volume= 0.196 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 512.87' @ 12.23 hrs Surf.Area= 1,800 sf Storage= 3,284 cf Plug -Flow detention time= 148.9 min calculated for 0.196 of (74% of inflow) Center -of -Mass det. time= 50.4 min ( 901.2 - 850.8 ) Volume Invert Avail.Storage Storage Description #1 509.40' 8,940 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic -feet) (cubic -feet) 509.40 1,800 0.0 0 0 510.00 1,800 25.0 270 270 512.00 1,800 40.0 1,440 1,710 513.00 1,800 100.0 1,800 3,510 514.00 2,655 100.0 2,228 5,738 515.00 3,750 100.0 3,203 8,940 Device Routing Invert Outlet Devices #1 Primary 509.01' 15.0" Round EX 15 CPP L= 115.3' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 509.01' / 506.75' S= 0.0196 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.23 sf #2 Device 1 512.70' 30.0" x 30.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.38 cfs @ 12.23 hrs HW=512.87' (Free Discharge) L1=EX 15 CPP (Passes 2.38 cfs of 8.40 cfs potential flow) t2=Riser (Weir Controls 2.38 cfs @ 1.36 fps) PRE_ Developed _Berkmar Type 1124-hr 1 year Rainfa&3. 01 " Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 26 Pond 2P: EX BIO FACILITY Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 1124-hr 1year Rainfa&3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 27 Summary for Pond 3P: SPCA EX SWM [921 Warning: Device #3 is above defined storage Inflow Area = 2.310 ac, 55.41 % Impervious, Inflow Depth > 1.32" for 1 year event Inflow = 5.07 cfs @ 12.00 hrs, Volume= 0.254 of Outflow = 2.66 cfs @ 12.09 hrs, Volume= 0.253 af, Atten= 47%, Lag= 5.8 min Primary = 2.66 cfs @ 12.09 hrs, Volume= 0.253 of Routed to Pond 2P : EX BIO FACILITY Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 518.94' @ 12.09 hrs Surf.Area= 0.031 ac Storage= 0.047 of Plug -Flow detention time= 9.5 min calculated for 0.253 of (100% of inflow) Center -of -Mass det. time= 7.3 min ( 847.1 - 839.8) Volume Invert Avail.Storaoe Storage Description #1 517.00' 0.097 of 48.0" Round RCP —Round 48" L= 335.0' Device Routing Invert Outlet Devices #1 Primary 517.00' 15.0" Round RCP —Round 15" L= 15.6' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 517.00' / 513.60' S= 0.2179 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 517.00' 9.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 522.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.66 cfs @ 12.09 hrs HW=518.94' (Free Discharge) L1=RCP_Round 15" (Passes 2.66 cfs of 9.24 cfs potential flow) tZ=Orifice/Grate (Orifice Controls 2.66 cfs @ 6.03 fps) 3=Orifice/Grate ( Controls 0.00 cfs) PRE_ Developed_Berkmar Type 11 24-hr 1 year Rainfall=3.01 " Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 28 Pond 3P: SPCA EX SWM Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 29 Summary for Pond 7P: Existing SWM Facility Inflow Area = 69.500 ac, 42.12% Impervious, Inflow Depth > 1.24" for 1 year event Inflow = 114.49 cfs @ 11.98 hrs, Volume= 7.170 of Outflow = 29.95 cfs @ 12.20 hrs, Volume= 7.170 af, Atten= 74%, Lag= 13.5 min Primary = 29.95 cfs @ 12.20 hrs, Volume= 7.170 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 466.74' @ 12.20 hrs Surf.Area= 18,686 sf Storage= 65,234 cf Plug -Flow detention time= 12.2 min calculated for 7.170 of (100% of inflow) Center -of -Mass det. time= 12.2 min ( 838.3 - 826.2) Volume Invert Avail.Storage Storage Description #1 453.60' 701,999 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 453.60 20 0 0 456.00 167 224 224 458.00 416 583 807 460.00 2,064 2,480 3,287 462.00 5,236 7,300 10,587 464.00 10,213 15,449 26,036 466.00 16,142 26,355 52,391 468.00 23,040 39,182 91,573 470.00 31,559 54,599 146,172 472.00 40,004 71,563 217,735 474.00 49,169 89,173 306,908 476.00 59,667 108,836 415,744 478.00 71,336 131,003 546,747 480.00 83,916 155,252 701,999 Device Routing Invert Outlet Devices #1 Primary 452.30' 36.0" Round Culvert L= 480.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 452.30' / 442.70' S= 0.0200 '/' Cc= 0.900 n= 0.013, Flow Area= 7.07 sf #2 Device 1 453.60' 18.0" Round RCP -Round 18" L= 52.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 453.60' / 452.80' S= 0.0154 '/' Cc= 0.900 n= 0.013, Flow Area= 1.77 sf #3 Device 1 470.11' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 479.50' 50.0' long x 10.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 PRE_ Developed _Berkmar Type 1124-hr 1 year Rainta&3. 01 " Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 30 Primary OutFlow Max=29.95 cfs @ 12.20 hrs HW=466.74' (Free Discharge) 1=Culvert (Passes 29.95 cfs of 116.54 cfs potential flow) 1 2=RCP_Round 18" (Inlet Controls 29.95 cfs @ 16.95 fps) 3=Orifice/Grate ( Controls 0.00 cfs) -Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Pond 7P: Existing SWM Facility Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 31 Summary for Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Inflow Area = 0.420 ac, 88.10% Impervious, Inflow Depth > 2.36" for 1 year event Inflow = 1.64 cfs @ 11.97 hrs, Volume= 0.082 of Outflow = 0.33 cfs @ 12.13 hrs, Volume= 0.082 af, Atten= 80%, Lag= 9.8 min Primary = 0.33 cfs @ 12.13 hrs, Volume= 0.082 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 525.28' @ 12.13 hrs Surf.Area= 0.018 ac Storage= 0.027 of Plug -Flow detention time= 26.5 min calculated for 0.082 of (100% of inflow) Center -of -Mass det. time= 26.1 min ( 811.2 - 785.1 ) Volume Invert Avail.Storage Storage Description #1 523.24' 0.074 of 60.0" Round RCP -Round 60" L= 165.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 523.24' 15.0" Round RCP -Round 16' L= 9.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 523.24' / 523.04' S= 0.0206 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 523.24' 3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 527.40' 3.7' long Sharp -Crested Rectangular Weir 0 End Contraction(s) Primary OutFlow Max=0.33 cfs @ 12.13 hrs HW=525.28' (Free Discharge) t1=RCP_Round 15" (Passes 0.33 cfs of 8.51 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.33 cfs @ 6.66 fps) 3-Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) PRE_ Developed_Berkmar Type 11 24-hr 1 year Rainfall=3.01 " Prepared by {enter your company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 32 Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Hydrograph ■ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 33 Summary for Pond 10P: SPCA SWM A SYSTEM 01 (CMP DETENTION) Inflow Area = 0.930 ac, 54.84% Impervious, Inflow Depth > 1.32" for 1 year event Inflow = 2.20 cfs @ 11.98 hrs, Volume= 0.102 of Outflow = 0.45 cfs @ 12.14 hrs, Volume= 0.102 af, Atten= 80%, Lag= 10.0 min Primary = 0.45 cfs @ 12.14 hrs, Volume= 0.102 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 512.21' @ 12.14 hrs Surf.Area= 0.022 ac Storage= 0.032 of Plug -Flow detention time= 24.0 min calculated for 0.102 of (100% of inflow) Center -of -Mass det. time= 23.2 min ( 861.6 - 838.3) Volume Invert Avail.Storage Storage Description #1 510.12' 0.133 of 84.0" Round CMP_Round W' L= 150.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 510.12' 15.0" Round RCP -Round 15" L= 24.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 510.12' / 509.17' S= 0.0385 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 510.12' 3.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 516.56' 3.8' long Sharp -Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=0.45 cfs @ 12.14 hrs HW=512.21' (Free Discharge) t1=RCP_Round 15" (Passes 0.45 cfs of 9.76 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.45 cfs @ 6.72 fps) 3-Sharp-Crested Vee/Trap Weir ( Controls 0.00 cfs) PRE_ Developed _Berkmar Type 1124-hr 1 year Rainfa&3. 01 " Prepared by {enter your company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 34 Pond 10P: SPCA SWM A SYSTEM 01 (CMP DETENTION) Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 35 Summary for Pond 11 P: BERKMAR OVERLOOK POND WP0201900050 Inflow Area = 7.430 ac, 0.00% Impervious, Inflow Depth > 1.19" for 1 year event Inflow = 15.20 cfs @ 11.99 hrs, Volume= 0.739 of Outflow = 8.34 cfs @ 12.08 hrs, Volume= 0.738 af, Atten= 45%, Lag= 5.3 min Primary = 8.34 cfs @ 12.08 hrs, Volume= 0.738 of Routed to Link 11 L : WP0201900050 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 523.24' @ 12.08 hrs Surf.Area= 4,025 sf Storage= 8,754 cf Plug -Flow detention time= 25.1 min calculated for 0.738 of (100% of inflow) Center -of -Mass det. time= 24.5 min ( 870.3 - 845.8 ) Volume Invert Avail.Storage Storage Description #1 518.00' 24,528 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 518.00 37 0 0 520.00 964 1,001 1,001 522.00 2,647 3,611 4,612 524.00 4,867 7,514 12,126 526.00 7,535 12,402 24,528 Device Routing Invert Outlet Devices #1 Primary 518.00' 18.0" Round RCP -Round 18" L= 119.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 518.00' / 514.00' S= 0.0336 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #2 Device 1 518.00' 6.0" Vert. Low -Flow Orifice C= 0.500 Limited to weir flow at low heads #3 Device 1 522.00' 9.0" Vert. Mid -Flow Orifice C= 0.500 Limited to weir flow at low heads #4 Device 1 523.00' 12.6' long Riser 2 End Contraction(s) #5 Primary 524.50' 12.0' long x 25.0' breadth Emergency Spillway Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=8.27 cfs @ 12.08 hrs HW=523.24' (Free Discharge) 1=RCP_Round 18" (Passes 8.27 cfs of 18.03 cfs potential flow) Low -Flow Orifice (Orifice Controls 1.76 cfs @ 8.96 fps) q-_-Riser Mid-Flow Orifice (Orifice Controls 1.65 cfs @ 3.73 fps) (Weir Controls 4.86 cfs @ 1.61 fps) S=Emergency Spillway ( Controls 0.00 cfs) PRE_ Developed_Berkmar Type 11 24-hr 1 year Rainfall=3.01 " Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 36 Pond 11P: BERKMAR OVERLOOK POND WPO201900050 Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 37 Summary for Link 10L: WPO201800030 Analysis Point Inflow Area = 26.310 ac, 32.76% Impervious, Inflow Depth > 0.84" for 1 year event Inflow = 27.02 cfs @ 12.01 hrs, Volume= 1.851 of Primary = 27.02 cfs @ 12.01 hrs, Volume= 1.851 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 10L: WPO201800030 Analysis Point Hydrograph ■ Inflow ■ Primary Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 38 Summary for Link 11 L: WP0201900050 Analysis Point Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 1.21" for 1 year event Inflow = 9.25 cfs @ 12.07 hrs, Volume= 0.852 of Primary = 9.25 cfs @ 12.07 hrs, Volume= 0.852 af, Atten= 0%, Lag= 0.0 min Routed to Reach 15R : Open Channel Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 11 L: WP0201900050 Analysis Point Hydrograph ■ Inflow ■ Primary Time (hours) PRE_ Developed _Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 39 Summary for Link 12L: Combined Upstream to Facility Inflow Area = 64.250 ac, 45.56% Impervious, Inflow Depth > 1.32" for 1 year event Inflow = 113.83 cfs @ 11.98 hrs, Volume= 7.073 of Primary = 113.83 cfs @ 11.98 hrs, Volume= 7.073 af, Atten= 0%, Lag= 0.0 min Routed to Pond 7P : Existing SWM Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 12L: Combined Upstream to Facility Hydrograph ■ Inflow ■ Primary Thm (houm) PRE_ Developed _Berkmar Type 1124-hr 10 year Rainta11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HVdroCAD®10.10-7a s/n 08663 © 2021 HVdroCAD Software Solutions LLC Paoe 40 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 0: LOD - PRE Runoff Area=5.470 ac 6.40% Impervious Runoff Depth>1.67" Tc=16.7 min CN=61 Runoff=10.66 cfs 0.761 of Subcatchment 1S: Lowes + ChickfilA Runoff Area=16.300 ac 86.87% Impervious Runoff Depth>4.68" Tc=6.0 min CN=93 Runoff=122.41 cfs 6.363 of Subcatchment 2S: Keglers Runoff Area=4.550 ac 80.88% Impervious Runoff Depth>4.46" Tc=6.0 min CN=91 Runoff=33.27 cfs 1.692 of Subcatchment 4S: Berkmar Overlook DA B Runoff Area=7.430 ac 0.00% Impervious Runoff Depth>3.23" Tc=7.2 min CN=79 Runoff=40.64 cfs 2.001 of Subcatchment 5S: West Berkmar Inlets Runoff Area=0.770 ac 27.27% Impervious Runoff Depth>2.50" Tc=6.0 min CN=71 Runoff=3.45 cfs 0.160 of Subcatchment 6S: PRE-Berkmar Self Storage Runoff Area=4.860 ac 7.61 % Impervious Runoff Depth>1.52" Flow Length=627' Tc=16.7 min CN=59 Runoff=8.44 cfs 0.615 of Subcatchment 7S: Ex. Dev. to West Runoff Area=9.790 ac 60.16% Impervious Runoff Depth>3.62" Tc=8.0 min CN=83 Runoff=57.50 cfs 2.956 of Subcatchment 8S: SPCA AREA F TO SWM A Runoff Area=0.930 ac 54.84% Impervious Runoff Depth>3.43" Tc=6.0 min CN=81 Runoff=5.58 cfs 0.266 of Subcatchment 10S: SPCA AREA H TO SWM B Runoff Area=0.420 ac 88.10% Impervious Runoff Depth>4.80" Tc=6.0 min CN=94 Runoff=3.19 cfs 0.168 of Subcatchment 11S: SPCA AREA TO EX BIO Subcatchment 12S: 12S SPCA Area 4 - Subcatchment 13S: SPCA AREA TO EX SWM Runoff Area=0.430 ac 0.00% Impervious Runoff Depth>1.60" Tc=6.0 min CN=60 Runoff=1.21 cfs 0.057 of Runoff Area=12.430 ac 4.59% Impervious Runoff Depth>1.45" Tc=8.0 min CN=58 Runoff=28.75 cfs 1.501 of Runoff Area=2.310 ac 55.41 % Impervious Runoff Depth>3.42" Tc=8.0 min CN=81 Runoff=12.93 cfs 0.659 of Subcatchment 14S: Open Space around Facility Runoff Area=5.250 ac 0.00% Impervious Runoff Depth>1.31" Tc=6.0 min CN=56 Runoff=11.71 cfs 0.572 of Subcatchment 17S: FCDC into Pipe Runoff Area=0.280 ac 100.00% Impervious Runoff Depth>5.26" Tc=6.0 min CN=98 Runoff=2.19 cfs 0.123 of Subcatchment 18S: Harvest Moon + Upstream Runoff Area=3.750 ac 52.00% Impervious Runoff Depth>3.33" Tc=7.5 min CN=80 Runoff=20.83 cfs 1.040 of Reach 15R: Open Channel Avg. Flow Depth=0.28' Max Vet=4.29 fps Inflow=33.78 cfs 2.282 of n=0.035 L=495.0' S=0.0566 7 Capacity=2,103.18 cfs Outflow=32.74 cfs 2.276 of PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 41 Pond 2P: EX BIO FACILITY Peak EIev=513.64' Storage=4,834 cf Inflow=22.01 cfs 0.715 of Outflow=9.33 cfs 0.646 of Pond 3P: SPCA EX SWM Peak Elev=527.63' Storage=0.097 of Inflow=12.93 cfs 0.659 of Outflow=20.84 cfs 0.658 of Pond 7P: Existing SWM Facility Peak EIev=471.80' Storage=209,773 cf Inflow=307.83 cfs 18.093 of Outflow=114.06 cfs 18.092 of Pond 9P: SPCA SWM B SYSTEM 02 (CMP Peak EIev=527.15' Storage=0.061 of Inflow=3.19 cfs 0.168 of Outflow=0.46 cfs 0.168 of Pond 10P: SPCA SWM A SYSTEM 01 (CMP Peak EIev=515.23' Storage=0.102 of Inflow=5.58 cfs 0.266 of Outflow=0.72 cfs 0.265 of Pond 11 P: BERKMAR OVERLOOK POND Peak EIev=524.93' Storage=17,207 cf Inflow=40.64 cfs 2.001 of Outflow=30.19 cfs 1.999 of Link 10L: WP0201800030 Analysis Point Inflow=95.89 cfs 5.536 of Primary=95.89 cfs 5.536 of Link 11L: WP0201900050 Analysis Point Inflow=33.78 cfs 2.282 of Primary=33.78 cfs 2.282 of Link 12L: Combined Upstream to Facility Inflow=296.12 cfs 17.522 of Primary=296.12 cfs 17.522 of Total Runoff Area = 74.970 ac Runoff Volume=18.933 of Average Runoff Depth = 3.03" 60.49% Pervious = 45.350 ac 39.51 % Impervious = 29.620 ac PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 42 Summary for Subcatchment 0: LOD - PRE Runoff = 10.66 cfs @ 12.10 hrs, Volume= 0.761 af, Depth> 1.67" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 5.120 58 Woods/grass comb., Good, HSG B 0.350 98 Paved parking, HSG B 5.470 61 Weighted Average 5.120 93.60% Pervious Area 0.350 6.40% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.7 Direct Entry, Subcatchment 0: LOD - PRE Hydrograph ■ Runofi 11- 10- Type 11 24-hr 9- 10 year Rainfall=5.50" Runoff Area=5.470 ac 8- Runoff Volume=0.761 of 7- Runoff Depth>1.67' LL 5 Tc=16.7 min 4- CN=61 0%J 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 43 Summary for Subcatchment 1S: Lowes + ChickfilA Runoff = 122.41 cfs @ 11.97 hrs, Volume= 6.363 af, Depth> 4.68" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 14.160 98 Paved parking, HSG B 2.140 61 >75% Grass cover, Good, HSG B 16.300 93 Weighted Average 2.140 13.13% Pervious Area 14.160 86.87% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment 1S: Lowes + ChickfilA Hydrograph ❑ Runoff 130- 122.41 cfs 20 Type II 24-hr 10 year Rainfall=5.50" °° Runoff Area=16.300 ac 90- ' Runoff Volume=6.363 of 80- w Runoff Depth>4.68" LL 60- Tc=6.0 min 7 8 9 19 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time )hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 44 Summary for Subcatchment 2S: Keglers Runoff = 33.27 cfs @ 11.97 hrs, Volume= 1.692 af, Depth> 4.46" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 3.680 98 Paved parking, HSG B 0.870 61 >75% Grass cover, Good, HSG B 4.550 91 Weighted Average 0.870 19.12% Pervious Area 3.680 80.88% Impervious Area Tc Length Capacity Description Direct Entry, Subcatchment 2S: Keglers Hydrograph Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 45 Summary for Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Runoff = 40.64 cfs @ 11.99 hrs, Volume= 2.001 af, Depth> 3.23" Routed to Pond 11P : BERKMAR OVERLOOK POND WP0201900050 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 7.430 79 Approved plan. Fully built. 7.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 7.2 Direct Entry, Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 46 Summary for Subcatchment 5S: West Berkmar Inlets Runoff = 3.45 cfs @ 11.98 hrs, Volume= 0.160 af, Depth> 2.50" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.210 98 Paved parking, HSG B 0.560 61 >75% Grass cover, Good, HSG B 0.770 71 Weighted Average 0.560 72.73% Pervious Area 0.210 27.27% Impervious Area Tc Length 1 Capacity Description Direct Entry, Subcatchment 5S: West Berkmar Inlets Hydrograph ❑Runoff 3.45 cfs Type II 24-hr 10 year Rainfall=5.50" Runoff Area=0.770 ac Runoff Volume=0.160 of Runoff Depth>2.50" Tc=6.0 min CN=71 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time )hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 47 Summary for Subcatchment 6S: PRE_Berkmar Self Storage WPO202200032 Runoff = 8.44 cfs @ 12.11 hrs, Volume= 0.615 af, Depth> 1.52" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.430 61 >75% Grass cover, Good, HSG B 4.060 55 Woods, Good, HSG B 4.860 59 Weighted Average 4.490 92.39% Pervious Area 0.370 7.61 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.0 100 0.0900 0.15 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.64" 2.0 167 0.0814 1.43 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.7 360 0.0527 1.64 131.20 Channel Flow, Area= 80.0 sf Perim= 30.0' r= 2.67' n= 0.400 16.7 627 Total Subcatchment 6S: PRE_Berkmar Self Storage WPO202200032 Hydrograph 9-- 8.44 Type II 24-hr 8_.. 10 year Rainfall=5.50" ' Runoff Area=4.860 ac 6- Runoff Volume=0.615 of 5 Runoff Depth>1.52" Flow Length=627' 4 Tc=16.7 min 3 CN=59 2 -- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runofi PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 48 Summary for Subcatchment 7S: Ex. Dev. to West Runoff = 57.50 cfs @ 11.99 hrs, Volume= 2.956 af, Depth> 3.62" Routed to Link 10L : WPO201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 2.890 61 >75% Grass cover, Good, HSG B 1.010 55 Woods, Good, HSG B 5.890 98 Paved parking, HSG B 9.790 83 Weighted Average 3.900 39.84% Pervious Area 5.890 60.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 7S: Ex. Dev. to West Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 49 Summary for Subcatchment 8S: SPCA AREA F TO SWM A Runoff = 5.58 cfs @ 11.97 hrs, Volume= 0.266 af, Depth> 3.43" Routed to Pond 10P : SPCA SWM A SYSTEM 01 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.510 98 Paved parking, HSG B 0.420 61 >75% Grass cover, Good, HSG B 0.930 81 Weighted Average 0.420 45.16% Pervious Area 0.510 54.84% Impervious Area Tc Length 2 1 Capacity Description Direct Entry, Subcatchment 8S: SPCA AREA F TO SWM A Hydrograph 5.58 cfs Type II 24-hr 10 year Rainfall=5.50" Runoff Area=0.930 ac Runoff Volume=0.266 of Runoff Depth>3.43" Tc=6.0 min CN=81 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 50 Summary for Subcatchment 10S: SPCA AREA H TO SWM B Runoff = 3.19 cfs @ 11.97 hrs, Volume= 0.168 af, Depth> 4.80" Routed to Pond 9P : SPCA SWM B SYSTEM 02 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.050 61 >75% Grass cover, Good, HSG B 0.420 94 Weighted Average 0.050 11.90% Pervious Area 0.370 88.10% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 10S: SPCA AREA H TO SWM B Hydrograph ❑ Runoff 3.19 cfs 3- Type II 24-hr 10 year Rainfall=5.50rr Runoff Area=0.420 ac V' Runoff Volume=0.168 of 2 RiiiinnfP nanfh5A Rno, LL Tc=6.0 min CN=94 3. 4. „5.., ,6,. 7�.. a. 9, ..1�0. 1,1 12 13 14 15 16 11., 1�8.. 1,9 .. 20 .21 2 2, ., 2 3 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 51 Summary for Subcatchment 11S: SPCA AREA TO EX BIO Runoff = 1.21 cfs @ 11.98 hrs, Volume= 0.057 af, Depth> 1.60" Routed to Pond 2P : FCC BIO FACILITY Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.250 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.430 60 Weighted Average 0.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 6.0 Direct Entry, Subcatchment 11S: SPCA AREA TO EX BIO Hydrograph ❑ Runoff 1.21 cfs Type II 24-hr 10 year Rainfall=5.50rr 1 k Runoff Area=0.430 ac HRunoff Volume=0.057 of Rrrnn# nanfh5l rw- Tc=6.0 min I I KA CN=60 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 52 Summary for Subcatchment 12S: 12S SPCA Area 4 - Upstream Runoff = 28.75 cfs @ 12.01 hrs, Volume= 1.501 af, Depth> 1.45" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.570 98 Paved parking, HSG B 1.290 61 >75% Grass cover, Good, HSG B 10.570 55 Woods, Good, HSG B 12.430 58 Weighted Average 11.860 95.41 % Pervious Area 0.570 4.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 12S: 12S SPCA Area 4 - Upstream Hydrograph 30 ` 28.75 cfs 28- Type 11. 24-hr '... 26- 10 year Rainfall=5.50" 24 Runoff Area=12.430 ac 22 20 Runoff Volume=1.501 of 'a Runoff Depth>1.45'' 3 ,6- ,4 Tc=8.0 min 12-_. CN=58-- E 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runofi PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 53 Summary for Subcatchment 13S: SPCA AREA TO EX SWM Runoff = 12.93 cfs @ 11.99 hrs, Volume= 0.659 af, Depth> 3.42" Routed to Pond 3P : SPCA EX SWM Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Descri 1.280 98 Paved parking, HSG B 0.890 61 >75% Grass cover, Good, HSG B 0.140 58 Woods/grass comb., Good, HSG B 2.310 81 Weighted Average 1.030 44.59% Pervious Area 1.280 55.41 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 13S: SPCA AREA TO EX SWM Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 54 Summary for Subcatchment US: Open Space around Facility Runoff = 11.71 cfs @ 11.98 hrs, Volume= 0.572 af, Depth> 1.31" Routed to Pond 7P : Existing SWIM Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 1.310 61 >75% Grass cover, Good, HSG B 3.940 55 Woods, Good, HSG B 5.250 56 Weighted Average 5.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 6 Subcatchment 14S: Open Space around Facility Hydrograph .71 cfs Type II 24-hr 10 year Rainfall=5.50" Runoff Area=5.250 ac Runoff Volume=0.572 of Runoff Depth>1.31' Tc=6.0 min CN=56 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 55 Summary for Subcatchment 17S: FCDC into Pipe Runoff = 2.19 cfs @ 11.97 hrs, Volume= 0.123 af, Depth> 5.26" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.280 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.280 98 Weighted Average 0.280 100.00% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 17S: FCDC into Pipe Hydrograph ❑ Runoff 2.19 cfs Type II 24-hr 2 10 year Rainfall=5.50" Runoff Area=0.280 ac Runoff Volume=0.123 of Runoff Depth>5.26" Tc=6.0 min 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 56 Summary for Subcatchment 18S: Harvest Moon + Upstream Runoff = 20.83 cfs @ 11.99 hrs, Volume= 1.040 af, Depth> 3.33" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 1.950 98 Paved parking, HSG B 1.800 61 >75% Grass cover, Good, HSG B 3.750 80 Weighted Average 1.800 48.00% Pervious Area 1.950 52.00% Impervious Area Tc Length Capacity Description 7.5 Direct Entry, ■ RunoiF Time (hours) PRE_ Developed _Berkmar Type // 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 57 Summary for Reach 15R: Open Channel Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 3.23" for 10 year event Inflow = 33.78 cfs @ 12.04 hrs, Volume= 2.282 of Outflow = 32.74 cfs @ 12.09 hrs, Volume= 2.276 af, Atten= 3%, Lag= 3.1 min Routed to Link 12L : Combined Upstream to Facility Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Max. Velocity= 4.29 fps, Min. Travel Time= 1.9 min Avg. Velocity = 1.22 fps, Avg. Travel Time= 6.8 min Peak Storage= 3,786 cf @ 12.06 hrs Average Depth at Peak Storage= 0.28' , Surface Width= 27.37' Bank -Full Depth= 3.50' Flow Area= 102.5 sf, Capacity= 2,103.18 cfs 27.00' x 3.50' deep channel, n= 0.035 Earth, dense weeds Side Slope Z-value= 0.6 0.7 7' Top Width= 31.55' Length= 495.0' Slope= 0.0566 T Inlet Invert= 512.00', Outlet Invert= 484.00' Reach 15R: Open Channel Hydrograph ■ Inflow ■ Outflow Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 58 Summary for Pond 2P: EX BIO FACILITY [791 Warning: Submerged Pond 3P Primary device # 1 OUTLET by 0.04' Inflow Area = 2.740 ac, 46.72% Impervious, Inflow Depth > 3.13" for 10 year event Inflow = 22.01 cfs @ 12.00 hrs, Volume= 0.715 of Outflow = 9.33 cfs @ 12.07 hrs, Volume= 0.646 af, Atten= 58%, Lag= 4.1 min Primary = 9.33 cfs @ 12.07 hrs, Volume= 0.646 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 513.64' @ 12.07 hrs Surf.Area= 2,346 sf Storage= 4,834 cf Plug -Flow detention time= 70.0 min calculated for 0.646 of (90% of inflow) Center -of -Mass det. time= 21.5 min ( 845.9 - 824.3) Volume Invert Avail.Storage Storage Description #1 509.40' 8,940 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic -feet) (cubic -feet) 509.40 1,800 0.0 0 0 510.00 1,800 25.0 270 270 512.00 1,800 40.0 1,440 1,710 513.00 1,800 100.0 1,800 3,510 514.00 2,655 100.0 2,228 5,738 515.00 3,750 100.0 3,203 8,940 Device Routing Invert Outlet Devices #1 Primary 509.01' 15.0" Round EX 15 CPP L= 115.3' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 509.01' / 506.75' S= 0.0196 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.23 sf #2 Device 1 512.70' 30.0" x 30.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=9.33 cfs @ 12.07 hrs HW=513.64' (Free Discharge) t1=EX 15 CPP (Inlet Controls 9.33 cfs @ 7.60 fps) L2=Riser (Passes 9.33 cfs of 29.13 cfs potential flow) PRE_ Developed_Berkmar Type/1 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 59 F❑ Intl- ❑ Pnmary PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 60 Summary for Pond 3P: SPCA EX SWM [921 Warning: Device #3 is above defined storage [931 Warning: Storage range exceeded by 6.63' [881 Warning: Qout>Qin may require smaller dt or Finer Routing [851 Warning: Oscillations may require smaller dt or Finer Routing (severity=5) Inflow Area = 2.310 ac, 55.41 % Impervious, Inflow Depth > 3.42" for 10 year event Inflow = 12.93 cfs @ 11.99 hrs, Volume= 0.659 of Outflow = 20.84 cfs @ 12.00 hrs, Volume= 0.658 af, Atten= 0%, Lag= 0.4 min Primary = 20.84 cfs @ 12.00 hrs, Volume= 0.658 of Routed to Pond 2P : EX BIO FACILITY Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 527.63' @ 12.00 hrs Storage= 0.097 of Plug -Flow detention time= 9.7 min calculated for 0.658 of (100% of inflow) Center -of -Mass det. time= 8.2 min ( 820.9 - 812.7) Volume Invert Avail.Storage Storage Description #1 517.00' 0.097 of 48.0" Round RCP -Round 48" L= 335.0' Device Routing Invert Outlet Devices #1 Primary 517.00' 15.0" Round RCP -Round 15" L= 15.6' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 517.00' / 513.60' S= 0.2179 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 517.00' 9.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 522.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=20.81 cfs @ 12.00 hrs HW=527.62' (Free Discharge) L1=RCP_Round 15" (Passes 20.81 cfs of 25.47 cfs potential flow) t2=Orifice/Grate (Orifice Controls 6.81 cfs @ 15.41 fps) 3--Orifice/Grate (Orifice Controls 14.00 cfs @ 11.41 fps) PRE_ Developed _Berkmar Type 1124-hr 10 year Rainfa&5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 61 Pond 3P: SPCA EX SWM Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa//=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 62 Summary for Pond 7P: Existing SWM Facility Inflow Area = 69.500 ac, 42.12% Impervious, Inflow Depth > 3.12" for 10 year event Inflow = 307.83 cfs @ 11.98 hrs, Volume= 18.093 of Outflow = 114.06 cfs @ 12.14 hrs, Volume= 18.092 af, Atten= 63%, Lag= 9.2 min Primary = 114.06 cfs @ 12.14 hrs, Volume= 18.092 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 471.80' @ 12.14 hrs Surf.Area= 39,155 sf Storage= 209,773 cf Plug -Flow detention time= 28.6 min calculated for 18.085 of (100% of inflow) Center -of -Mass det. time= 28.5 min ( 836.8 - 808.3) Volume Invert Avail.Storage Storage Description #1 453.60' 701,999 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 453.60 20 0 0 456.00 167 224 224 458.00 416 583 807 460.00 2,064 2,480 3,287 462.00 5,236 7,300 10,587 464.00 10,213 15,449 26,036 466.00 16,142 26,355 52,391 468.00 23,040 39,182 91,573 470.00 31,559 54,599 146,172 472.00 40,004 71,563 217,735 474.00 49,169 89,173 306,908 476.00 59,667 108,836 415,744 478.00 71,336 131,003 546,747 480.00 83,916 155,252 701,999 Device Routing Invert Outlet Devices #1 Primary 452.30' 36.0" Round Culvert L= 480.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 452.30' / 442.70' S= 0.0200 '/' Cc= 0.900 n= 0.013, Flow Area= 7.07 sf #2 Device 1 453.60' 18.0" Round RCP -Round 18" L= 52.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 453.60' / 452.80' S= 0.0154 '/' Cc= 0.900 n= 0.013, Flow Area= 1.77 sf #3 Device 1 470.11' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 479.50' 50.0' long x 10.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 PRE_ Developed _Berkmar Type 1124-hr 10 year Rainta//=5.50" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 63 Primary OutFlow Max=114.16 cfs @ 12.14 hrs HW=471.80' (Free Discharge) 1=Culvert (Passes 114.16 cfs of 129.80 cfs potential flow) 1 2=RCP_Round 18" (Inlet Controls 35.54 cfs @ 20.11 fps) 3=Orifice/Grate (Orifice Controls 78.62 cfs @ 6.26 fps) -Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Pond 7P: Existing SWM Facility Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 64 Summary for Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Inflow Area = 0.420 ac, 88.10% Impervious, Inflow Depth > 4.80" for 10 year event Inflow = 3.19 cfs @ 11.97 hrs, Volume= 0.168 of Outflow = 0.46 cfs @ 12.19 hrs, Volume= 0.168 af, Atten= 86%, Lag= 13.0 min Primary = 0.46 cfs @ 12.19 hrs, Volume= 0.168 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 527.15' @ 12.19 hrs Surf.Area= 0.016 ac Storage= 0.061 of Plug -Flow detention time= 46.3 min calculated for 0.168 of (100% of inflow) Center -of -Mass det. time= 45.7 min ( 812.3 - 766.5 ) Volume Invert Avail.Storage Storage Description #1 523.24' 0.074 of 60.0" Round RCP -Round 60" L= 165.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 523.24' 15.0" Round RCP -Round 16' L= 9.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 523.24' / 523.04' S= 0.0206 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 523.24' 3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 527.40' 3.7' long Sharp -Crested Rectangular Weir 0 End Contraction(s) Primary OutFlow Max=0.46 cfs @ 12.19 hrs HW=527.15' (Free Discharge) t1=RCP_Round 15" (Passes 0.46 cfs of 14.47 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.46 cfs @ 9.37 fps) 3-Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) PRE_ Developed _Berkmar Type 1124-hr 10 year Rainfa&5.50" Prepared by {enter your company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 65 Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 66 Summary for Pond 10P: SPCA SWM A SYSTEM 01 (CMP DETENTION) Inflow Area = 0.930 ac, 54.84% Impervious, Inflow Depth > 3.43" for 10 year event Inflow = 5.58 cfs @ 11.97 hrs, Volume= 0.266 of Outflow = 0.72 cfs @ 12.25 hrs, Volume= 0.265 af, Atten= 87%, Lag= 16.9 min Primary = 0.72 cfs @ 12.25 hrs, Volume= 0.265 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 515.23' @ 12.25 hrs Surf.Area= 0.022 ac Storage= 0.102 of Plug -Flow detention time= 54.6 min calculated for 0.265 of (100% of inflow) Center -of -Mass det. time= 53.8 min ( 865.0 - 811.1 ) Volume Invert Avail.Storage Storage Description #1 510.12' 0.133 of 84.0" Round CMP_Round W' L= 150.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 510.12' 15.0" Round RCP -Round 15" L= 24.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 510.12' / 509.17' S= 0.0385 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 510.12' 3.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 516.56' 3.8' long Sharp -Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=0.72 cfs @ 12.25 hrs HW=515.23' (Free Discharge) t1=RCP_Round 15" (Passes 0.72 cfs of 16.68 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.72 cfs @ 10.72 fps) 3-Sharp-Crested Vee/Trap Weir ( Controls 0.00 cfs) PRE_ Developed_Berkmar Type/1 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 67 F❑ Intl- ❑ P —ry PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 68 Summary for Pond 11 P: BERKMAR OVERLOOK POND WP0201900050 Inflow Area = 7.430 ac, 0.00% Impervious, Inflow Depth > 3.23" for 10 year event Inflow = 40.64 cfs @ 11.99 hrs, Volume= 2.001 of Outflow = 30.19 cfs @ 12.05 hrs, Volume= 1.999 af, Atten= 26%, Lag= 3.7 min Primary = 30.19 cfs @ 12.05 hrs, Volume= 1.999 of Routed to Link 11 L : WP0201900050 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 524.93' @ 12.05 hrs Surf.Area= 6,103 sf Storage= 17,207 cf Plug -Flow detention time= 20.8 min calculated for 1.999 of (100% of inflow) Center -of -Mass det. time= 20.3 min ( 837.5 - 817.3 ) Volume Invert Avail.Storage Storage Description #1 518.00' 24,528 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 518.00 37 0 0 520.00 964 1,001 1,001 522.00 2,647 3,611 4,612 524.00 4,867 7,514 12,126 526.00 7,535 12,402 24,528 Device Routing Invert Outlet Devices #1 Primary 518.00' 18.0" Round RCP -Round 18" L= 119.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 518.00' / 514.00' S= 0.0336 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #2 Device 1 518.00' 6.0" Vert. Low -Flow Orifice C= 0.500 Limited to weir flow at low heads #3 Device 1 522.00' 9.0" Vert. Mid -Flow Orifice C= 0.500 Limited to weir flow at low heads #4 Device 1 523.00' 12.6' long Riser 2 End Contraction(s) #5 Primary 524.50' 12.0' long x 25.0' breadth Emergency Spillway Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=30.11 cfs @ 12.05 hrs HW=524.92' (Free Discharge) 1=RCP_Round 18" (Inlet Controls 21.14 cfs @ 11.96 fps) Low -Flow Orifice (Passes < 2.04 cfs potential flow) q-Riser Mid-Flow Orifice (Passes< 2.83 cfs potential flow) (Passes < 106.66 cfs potential flow) S=Emergency Spillway (Weir Controls 8.97 cfs @ 1.76 fps) PRE_ Developed_Berkmar Type/1 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 69 Pond 11P: BERKMAR OVERLOOK POND WPO201900050 Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 70 Summary for Link 10L: WPO201800030 Analysis Point Inflow Area = 26.310 ac, 32.76% Impervious, Inflow Depth > 2.53" for 10 year event Inflow = 95.89 cfs @ 12.00 hrs, Volume= 5.536 of Primary = 95.89 cfs @ 12.00 hrs, Volume= 5.536 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 10L: WPO201800030 Analysis Point Hydrograph ■ Inflow ■ Primary Thm (houm) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 71 Summary for Link 11 L: WP0201900050 Analysis Point Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 3.23" for 10 year event Inflow = 33.78 cfs @ 12.04 hrs, Volume= 2.282 of Primary = 33.78 cfs @ 12.04 hrs, Volume= 2.282 af, Atten= 0%, Lag= 0.0 min Routed to Reach 15R : Open Channel Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 11 L: WP0201900050 Analysis Point Hydrograph ■ Inflow ■ Primary Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 72 Summary for Link 12L: Combined Upstream to Facility Inflow Area = 64.250 ac, 45.56% Impervious, Inflow Depth > 3.27" for 10 year event Inflow = 296.12 cfs @ 11.98 hrs, Volume= 17.522 of Primary = 296.12 cfs @ 11.98 hrs, Volume= 17.522 af, Atten= 0%, Lag= 0.0 min Routed to Pond 7P : Existing SWM Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 12L: Combined Upstream to Facility Hydrograph ■ Inflow ■ Primary Thm (houm) PRE_ Developed _Berkmar Type 1124-hr 100 year Rainta11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HVdroCAD®10.10-7a s/n 08663 © 2021 HVdroCAD Software Solutions LLC Paoe 73 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 0: LOD - PRE Runoff Area=5.470 ac 6.40% Impervious Runoff Depth>4.22" Tc=16.7 min CN=61 Runoff=28.37 cfs 1.923 of Subcatchment 1S: Lowes + ChickfilA Runoff Area=16.300 ac 86.87% Impervious Runoff Depth>8.17" Tc=6.0 min CN=93 Runoff=206.26 cfs 11.093 of Subcatchment 2S: Keglers Runoff Area=4.550 ac 80.88% Impervious Runoff Depth>7.92" Tc=6.0 min CN=91 Runoff=56.87 cfs 3.005 of Subcatchment 4S: Berkmar Overlook DA B Runoff Area=7.430 ac 0.00% Impervious Runoff Depth>6.45" Tc=7.2 min CN=79 Runoff=78.54 cfs 3.996 of Subcatchment 5S: West Berkmar Inlets Runoff Area=0.770 ac 27.27% Impervious Runoff Depth>5.47" Tc=6.0 min CN=71 Runoff=7.41 cfs 0.351 of Subcatchment 6S: PRE-Berkmar Self Storage Runoff Area=4.860 ac 7.61 % Impervious Runoff Depth>3.97" Flow Length=627' Tc=16.7 min CN=59 Runoff=23.65 cfs 1.609 of Subcatchment 7S: Ex. Dev. to West Runoff Area=9.790 ac 60.16% Impervious Runoff Depth>6.94" Tc=8.0 min CN=83 Runoff=106.29 cfs 5.665 of Subcatchment 8S: SPCA AREA F TO SWM A Runoff Area=0.930 ac 54.84% Impervious Runoff Depth>6.70" Tc=6.0 min CN=81 Runoff=10.52 cfs 0.519 of Subcatchment 10S: SPCA AREA H TO SWM B Runoff Area=0.420 ac 88.10% Impervious Runoff Depth>8.29" Tc=6.0 min CN=94 Runoff=5.34 cfs 0.290 of Subcatchment 11S: SPCA AREA TO EX BIO Subcatchment 12S: 12S SPCA Area 4 - Subcatchment 13S: SPCA AREA TO EX SWM Runoff Area=0.430 ac 0.00% Impervious Runoff Depth>4.11" Tc=6.0 min CN=60 Runoff=3.17 cfs 0.147 of Runoff Area=12.430 ac 4.59% Impervious Runoff Depth>3.86" Tc=8.0 min CN=58 Runoff=79.90 cfs 4.000 of Runoff Area=2.310 ac 55.41 % Impervious Runoff Depth>6.70" Tc=8.0 min CN=81 Runoff=24.45 cfs 1.290 of Subcatchment 14S: Open Space around Facility Runoff Area=5.250 ac 0.00% Impervious Runoff Depth>3.62" Tc=6.0 min CN=56 Runoff=34.11 cfs 1.583 of Subcatchment 17S: FCDC into Pipe Runoff Area=0.280 ac 100.00% Impervious Runoff Depth>8.77" Tc=6.0 min CN=98 Runoff=3.61 cfs 0.205 of Subcatchment 18S: Harvest Moon + Upstream Runoff Area=3.750 ac 52.00% Impervious Runoff Depth>6.58" Tc=7.5 min CN=80 Runoff=39.81 cfs 2.055 of Reach 15R: Open Channel Avg. Flow Depth=0.49' Max Vet=6.12 fps Inflow=82.37 cfs 4.545 of n=0.035 L=495.0' S=0.0566 7 Capacity=2,103.18 cfs Outflow=81.24 cfs 4.535 of PRE_ Developed _Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 74 Pond 2P: EX BIO FACILITY Peak Elev=548.37' Storage=8,940 cf Inflow=29.71 cfs 1.434 of Outflow=29.04 cfs 1.365 of Pond 3P: SPCA EX SWM Peak Elev=531.82' Storage=0.097 of Inflow=24.45 cfs 1.290 of Outflow=26.60 cfs 1.287 of Pond 7P: Existing SWM Facility Peak Elev=477.13' Storage=486,941 cf Inflow=636.41 cfs 35.719 of Outflow=142.44 cfs 35.717 of Pond 9P: SPCA SWM B SYSTEM 02 (CMP Peak Elev=527.93' Storage=0.072 of Inflow=5.34 cfs 0.290 of Outflow=5.20 cfs 0.290 of Pond 10P: SPCA SWM A SYSTEM 01 (CMP Peak Elev=517.42' Storage=0.133 of Inflow=10.52 cfs 0.519 of Outflow=10.80 cfs 0.519 of Pond 11 P: BERKMAR OVERLOOK POND Peak Elev=525.86' Storage=23,477 cf Inflow=78.54 cfs 3.996 of Outflow=72.87 cfs 3.989 of Link 10L: WP0201800030 Analysis Point Inflow=229.35 cfs 11.838 of Primary=229.35 cfs 11.838 of Link 11L: WP0201900050 Analysis Point Inflow=82.37 cfs 4.545 of Primary=82.37 cfs 4.545 of Link 12L: Combined Upstream to Facility Inflow=603.06 cfs 34.136 of Primary=603.06 cfs 34.136 of Total Runoff Area = 74.970 ac Runoff Volume = 37.732 of Average Runoff Depth = 6.04" 60.49% Pervious = 45.350 ac 39.51 % Impervious = 29.620 ac PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 75 Summary for Subcatchment 0: LOD - PRE Runoff = 28.37 cfs @ 12.09 hrs, Volume= 1.923 af, Depth> 4.22" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 5.120 58 Woods/grass comb., Good, HSG B 0.350 98 Paved parking, HSG B 5.470 61 Weighted Average 5.120 93.60% Pervious Area 0.350 6.40% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.7 Direct Entry, 39 28 26 24 22 29 n 18 3 i6 0 LL 14 12 6 4 2 9' 9 Subcatchment 0: LOD - PRE Hydrograph Type 11 24-hr 100 year Rainfall=9.02rr Runoff Area=5.470 ac Runoff Volume=1.923 of Runoff Depth>4.22rr Tc=16.7 min CN=61 ....... 1 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runofi PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 76 Summary for Subcatchment 1S: Lowes + ChickfilA Runoff = 206.26 cfs @ 11.97 hrs, Volume= 11.093 af, Depth> 8.17" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 14.160 98 Paved parking, HSG B 2.140 61 >75% Grass cover, Good, HSG B 16.300 93 Weighted Average 2.140 13.13% Pervious Area 14.160 86.87% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 1S: Lowes + ChickfilA Hydrograph ■ Runofi Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 77 Summary for Subcatchment 2S: Keglers Runoff = 56.87 cfs @ 11.97 hrs, Volume= 3.005 af, Depth> 7.92" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 3.680 98 Paved parking, HSG B 0.870 61 >75% Grass cover, Good, HSG B 4.550 91 Weighted Average 0.870 19.12% Pervious Area 3.680 80.88% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 2S: Keglers Hydrograph ❑ Runoff 1 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 29 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 78 Summary for Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Runoff = 78.54 cfs @ 11.98 hrs, Volume= 3.996 af, Depth> 6.45" Routed to Pond 11P : BERKMAR OVERLOOK POND WP0201900050 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 7.430 79 Approved plan. Fully built. 7.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 7.2 Direct Entry, Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 79 Summary for Subcatchment SS: West Berkmar Inlets Runoff = 7.41 cfs @ 11.97 hrs, Volume= 0.351 af, Depth> 5.47" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.210 98 Paved parking, HSG B 0.560 61 >75% Grass cover, Good, HSG B 0.770 71 Weighted Average 0.560 72.73% Pervious Area 0.210 27.27% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment SS: West Berkmar Inlets Hydrograph 8- 7.41 cfs - Type II 24-hr 100 year Rainfall=9.02" 6-Runoff Area=0.770 ac 5 1 Runoff Volume=0.351 of Runoff Depth>5.47" 0 4 LL Tc=6.0 min 3 - - - CN=71 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 80 Summary for Subcatchment 6S: PRE_Berkmar Self Storage WPO202200032 Runoff = 23.65 cfs @ 12.09 hrs, Volume= 1.609 af, Depth> 3.97" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.430 61 >75% Grass cover, Good, HSG B 4.060 55 Woods, Good, HSG B 4.860 59 Weighted Average 4.490 92.39% Pervious Area 0.370 7.61 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.0 100 0.0900 0.15 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.64" 2.0 167 0.0814 1.43 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.7 360 0.0527 1.64 131.20 Channel Flow, Area= 80.0 sf Perim= 30.0' r= 2.67' n= 0.400 16.7 627 Total ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 81 Summary for Subcatchment 7S: Ex. Dev. to West Runoff = 106.29 cfs @ 11.99 hrs, Volume= 5.665 af, Depth> 6.94" Routed to Link 10L : WPO201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Descri 2.890 61 >75% Grass cover, Good, HSG B 1.010 55 Woods, Good, HSG B 5.890 98 Paved parking, HSG B 9.790 83 Weighted Average 3.900 39.84% Pervious Area 5.890 60.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 7S: Ex. Dev. to West Hydrograph ■ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 82 Summary for Subcatchment 8S: SPCA AREA F TO SWM A Runoff = 10.52 cfs @ 11.97 hrs, Volume= 0.519 af, Depth> 6.70" Routed to Pond 10P : SPCA SWM A SYSTEM 01 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.510 98 Paved parking, HSG B 0.420 61 >75% Grass cover, Good, HSG B 0.930 81 Weighted Average 0.420 45.16% Pervious Area 0.510 54.84% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment 8S: SPCA AREA F TO SWM A Hydrograph ❑ Runoff PRE_ Developed _Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 83 Summary for Subcatchment 10S: SPCA AREA H TO SWM B Runoff = 5.34 cfs @ 11.97 hrs, Volume= 0.290 af, Depth> 8.29" Routed to Pond 9P : SPCA SWM B SYSTEM 02 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.050 61 >75% Grass cover, Good, HSG B 0.420 94 Weighted Average 0.050 11.90% Pervious Area 0.370 88.10% Impervious Area Tc Length 1 0 Capacity Description Direct Entry, Subcatchment 10S: SPCA AREA H TO SWM B Hydrograph ❑Runoff 5.34 cfs Type 11 24-hr 100 year Rainfall=9.02" Runoff Area=0.420 ac Runoff Volume=0.290 of Runoff Depth>8.29" Tc=6.0 min CN=94 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 84 Summary for Subcatchment 11S: SPCA AREA TO EX BIO Runoff = 3.17 cfs @ 11.98 hrs, Volume= 0.147 af, Depth> 4.11" Routed to Pond 2P : FCC BIO FACILITY Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.250 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.430 60 Weighted Average 0.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 1 Direct Entry, Subcatchment 11S: SPCA AREA TO EX BIO Hydrograph ❑ Runoff 3.17 cfs Type II 24-hr 100 year Rainfall=9.02" Runoff Area=0.430 ac Runoff Volume=0.147 of Runoff Depth>4.11" Tc=6.0 min CN=60 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 85 Summary for Subcatchment 12S: 12S SPCA Area 4 - Upstream Runoff = 79.90 cfs @ 12.00 hrs, Volume= 4.000 af, Depth> 3.86" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.570 98 Paved parking, HSG B 1.290 61 >75% Grass cover, Good, HSG B 10.570 55 Woods, Good, HSG B 12.430 58 Weighted Average 11.860 95.41 % Pervious Area 0.570 4.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, 20 Subcatchment 12S: 12S SPCA Area 4 - Upstream Hydrograph Type II 24-hr 100 year Rainfall=9.02" Runoff Area=12.430 ac Runoff Volume=4.000 of Runoff Depth>3.86 Tc=8.0 min CN=58 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 86 Summary for Subcatchment 13S: SPCA AREA TO EX SWM Runoff = 24.45 cfs @ 11.99 hrs, Volume= 1.290 af, Depth> 6.70" Routed to Pond 3P : SPCA EX SWM Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Descri 1.280 98 Paved parking, HSG B 0.890 61 >75% Grass cover, Good, HSG B 0.140 58 Woods/grass comb., Good, HSG B 2.310 81 Weighted Average 1.030 44.59% Pervious Area 1.280 55.41 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 13S: SPCA AREA TO EX SWM Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 87 Summary for Subcatchment US: Open Space around Facility Runoff = 34.11 cfs @ 11.98 hrs, Volume= 1.583 af, Depth> 3.62" Routed to Pond 7P : Existing SWIM Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 1.310 61 >75% Grass cover, Good, HSG B 3.940 55 Woods, Good, HSG B 5.250 56 Weighted Average 5.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, ■ Runoff PRE_ Developed _Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 88 Summary for Subcatchment 17S: FCDC into Pipe Runoff = 3.61 cfs @ 11.97 hrs, Volume= 0.205 af, Depth> 8.77" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.280 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.280 98 Weighted Average 0.280 100.00% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 17S: FCDC into Pipe Hydrograph ❑ Runoff 3.61 cfs Type II 24-hr 100 year Rainfall=9.02" 3- Runoff Area=0.280 ac Runoff Volume=0.205 of Runoff Depth>8.77' 2 Tc=6.0 min -1 1 U CN=98 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 89 Summary for Subcatchment 18S: Harvest Moon + Upstream Runoff = 39.81 cfs @ 11.99 hrs, Volume= 2.055 af, Depth> 6.58" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 1.950 98 Paved parking, HSG B 1.800 61 >75% Grass cover, Good, HSG B 3.750 80 Weighted Average 1.800 48.00% Pervious Area 1.950 52.00% Impervious Area Tc Length Capacity Description 7.5 Direct Entry, Subcatchment 18S: Harvest Moon + Upstream Hydrograph ❑ Runoff Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 90 Summary for Reach 15R: Open Channel Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 6.43" for 100 year event Inflow = 82.37 cfs @ 12.01 hrs, Volume= 4.545 of Outflow = 81.24 cfs @ 12.04 hrs, Volume= 4.535 af, Atten= 1 %, Lag= 2.2 min Routed to Link 12L : Combined Upstream to Facility Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Max. Velocity= 6.12 fps, Min. Travel Time= 1.3 min Avg. Velocity = 1.35 fps, Avg. Travel Time= 6.1 min Peak Storage= 6,577 cf @ 12.02 hrs Average Depth at Peak Storage= 0.49' , Surface Width= 27.63' Bank -Full Depth= 3.50' Flow Area= 102.5 sf, Capacity= 2,103.18 cfs 27.00' x 3.50' deep channel, n= 0.035 Earth, dense weeds Side Slope Z-value= 0.6 0.7 7' Top Width= 31.55' Length= 495.0' Slope= 0.0566 T Inlet Invert= 512.00', Outlet Invert= 484.00' ■ Inflow ■ Outflow PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 91 Summary for Pond 2P: EX BIO FACILITY [93] Warning: Storage range exceeded by 33.37' [81] Warning: Exceeded Pond 3P by 19.85' @ 12.00 hrs Inflow Area = 2.740 ac, 46.72% Impervious, Inflow Depth > 6.28" for 100 year event Inflow = 29.71 cfs @ 11.99 hrs, Volume= 1.434 of Outflow = 29.04 cfs @ 12.00 hrs, Volume= 1.365 af, Atten= 2%, Lag= 0.6 min Primary = 29.04 cfs @ 12.00 hrs, Volume= 1.365 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 548.37' @ 12.00 hrs Surf.Area= 3,750 sf Storage= 8,940 cf Plug -Flow detention time= 45.4 min calculated for 1.364 of (95% of inflow) Center -of -Mass det. time= 17.9 min ( 822.0 - 804.1 ) Volume Invert Avail.Storage Storage Description #1 509.40' 8,940 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic -feet) (cubic -feet) 509.40 1,800 0.0 0 0 510.00 1,800 25.0 270 270 512.00 1,800 40.0 1,440 1,710 513.00 1,800 100.0 1,800 3,510 514.00 2,655 100.0 2,228 5,738 515.00 3,750 100.0 3,203 8,940 Device Routing Invert Outlet Devices #1 Primary 509.01' 15.0" Round EX 15 CPP L= 115.3' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 509.01' / 506.75' S= 0.0196 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.23 sf #2 Device 1 512.70' 30.0" x 30.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=28.84 cfs @ 12.00 hrs HW=547.86' (Free Discharge) L1=EX 15 CPP (Inlet Controls 28.84 cfs @ 23.50 fps) t2=Riser (Passes 28.84 cfs of 178.45 cfs potential flow) PRE_ Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 92 Pond 2P: EX BIO FACILITY Hydrograph ■ Inflow ® Pnmary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type /I 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 93 Summary for Pond 3P: SPCA EX SWM [921 Warning: Device #3 is above defined storage [931 Warning: Storage range exceeded by 10.82' [881 Warning: Qout>Qin may require smaller dt or Finer Routing [851 Warning: Oscillations may require smaller dt or Finer Routing (severity=15) Inflow Area = 2.310 ac, 55.41 % Impervious, Inflow Depth > 6.70" for 100 year event Inflow = 24.45 cfs @ 11.99 hrs, Volume= 1.290 of Outflow = 26.60 cfs @ 11.99 hrs, Volume= 1.287 af, Atten= 0%, Lag= 0.0 min Primary = 26.60 cfs @ 11.99 hrs, Volume= 1.287 of Routed to Pond 2P : EX BIO FACILITY Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 531.82' @ 11.99 hrs Storage= 0.097 of Plug -Flow detention time= 7.9 min calculated for 1.286 of (100% of inflow) Center -of -Mass det. time= 6.7 min ( 800.4 - 793.8) Volume Invert Avail.Storage Storage Description #1 517.00' 0.097 of 48.0" Round RCP -Round 48" L= 335.0' Device Routing Invert Outlet Devices #1 Primary 517.00' 15.0" Round RCP -Round 15" L= 15.6' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 517.00' / 513.60' S= 0.2179 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 517.00' 9.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 522.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=26.58 cfs @ 11.99 hrs HW=531.80' (Free Discharge) L1=RCP_Round 15" (Passes 26.58 cfs of 30.34 cfs potential flow) t2=Orifice/Grate (Orifice Controls 8.08 cfs @ 18.29 fps) 3--Orifice/Grate (Orifice Controls 18.50 cfs @ 15.08 fps) PRE_ Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 94 Pond 3P: SPCA EX SWM Hydrograph ■ Inflow p Pr mary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa&9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 95 Summary for Pond 7P: Existing SWM Facility Inflow Area = 69.500 ac, 42.12% Impervious, Inflow Depth > 6.17" for 100 year event Inflow = 636.41 cfs @ 11.99 hrs, Volume= 35.719 of Outflow = 142.44 cfs @ 12.21 hrs, Volume= 35.717 af, Atten= 78%, Lag= 12.9 min Primary = 142.44 cfs @ 12.21 hrs, Volume= 35.717 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 477.13' @ 12.21 hrs Surf.Area= 66,264 sf Storage= 486,941 cf Plug -Flow detention time= 33.5 min calculated for 35.702 of (100% of inflow) Center -of -Mass det. time= 33.4 min ( 827.6 - 794.1 ) Volume Invert Avail.Storage Storage Description #1 453.60' 701,999 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 453.60 20 0 0 456.00 167 224 224 458.00 416 583 807 460.00 2,064 2,480 3,287 462.00 5,236 7,300 10,587 464.00 10,213 15,449 26,036 466.00 16,142 26,355 52,391 468.00 23,040 39,182 91,573 470.00 31,559 54,599 146,172 472.00 40,004 71,563 217,735 474.00 49,169 89,173 306,908 476.00 59,667 108,836 415,744 478.00 71,336 131,003 546,747 480.00 83,916 155,252 701,999 Device Routing Invert Outlet Devices #1 Primary 452.30' 36.0" Round Culvert L= 480.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 452.30' / 442.70' S= 0.0200 '/' Cc= 0.900 n= 0.013, Flow Area= 7.07 sf #2 Device 1 453.60' 18.0" Round RCP -Round 18" L= 52.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 453.60' / 452.80' S= 0.0154 '/' Cc= 0.900 n= 0.013, Flow Area= 1.77 sf #3 Device 1 470.11' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 479.50' 50.0' long x 10.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 PRE_ Developed _Berkmar Type /I 24-hr 100 year Rainta&9.02" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 96 Primary OutFlow Max=142.44 cfs @ 12.21 hrs HW=477.13' (Free Discharge) 1=Culvert (Barrel Controls 142.44 cfs @ 20.15 fps) 1 2=RCP_Round 18" (Passes < 40.61 cfs potential flow) 3=Orifice/Grate (Passes < 160.32 cfs potential flow) -Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Pond 7P: Existing SWM Facility Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type /I 24-hr 100 year Rainfa&9.02" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 97 Summary for Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Inflow Area = 0.420 ac, 88.10% Impervious, Inflow Depth > 8.29" for 100 year event Inflow = 5.34 cfs @ 11.97 hrs, Volume= 0.290 of Outflow = 5.20 cfs @ 11.99 hrs, Volume= 0.290 af, Atten= 3%, Lag= 1.1 min Primary = 5.20 cfs @ 11.99 hrs, Volume= 0.290 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 527.93' @ 11.99 hrs Surf.Area= 0.010 ac Storage= 0.072 of Plug -Flow detention time= 40.0 min calculated for 0.290 of (100% of inflow) Center -of -Mass det. time= 39.4 min ( 793.4 - 754.1 ) Volume Invert Avail.Storage Storage Description #1 523.24' 0.074 of 60.0" Round RCP -Round 60" L= 165.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 523.24' 15.0" Round RCP -Round 16' L= 9.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 523.24' / 523.04' S= 0.0206 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 523.24' 3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 527.40' 3.7' long Sharp -Crested Rectangular Weir 0 End Contraction(s) Primary OutFlow Max=5.18 cfs @ 11.99 hrs HW=527.93' (Free Discharge) t1=RCP_Round 15" (Passes 5.18 cfs of 16.25 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.51 cfs @ 10.29 fps) 3-Sharp-Crested Rectangular Weir (Weir Controls 4.67 cfs @ 2.38 fps) PRE_ Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 98 Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type /I 24-hr 100 year Rainfa&9.02" Prepared by {enter your company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 99 Summary for Pond 10P: SPCA SWM A SYSTEM 01 (CMP DETENTION) [93] Warning: Storage range exceeded by 0.15' [88] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow Area = 0.930 ac, 54.84% Impervious, Inflow Depth > 6.70" for 100 year event Inflow = 10.52 cfs @ 11.97 hrs, Volume= 0.519 of Outflow = 10.80 cfs @ 11.97 hrs, Volume= 0.519 af, Atten= 0%, Lag= 0.0 min Primary = 10.80 cfs @ 11.97 hrs, Volume= 0.519 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 517.42' @ 11.97 hrs Storage= 0.133 of Plug -Flow detention time= 51.2 min calculated for 0.518 of (100% of inflow) Center -of -Mass det. time= 50.2 min ( 842.4 - 792.2) Volume Invert Avail.Storage Storage Description #1 510.12' 0.133 of 84.0" Round CMP_Round U' L= 150.0' S= 0.0010 '/' Device Routing Invert Outlet Devices #1 Primary 510.12' 15.0" Round RCP -Round 1T' L= 24.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 510.12' / 509.17' S= 0.0385 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 510.12' 3.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 516.56' 3.8' long Sharp -Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=10.79 cfs @ 11.97 hrs HW=517.42' (Free Discharge) t1=RCP_Round 15" (Passes 10.79 cfs of 20.13 cfs potential flow) tZ=Orifice/Grate (Orifice Controls 0.86 cfs @ 12.88 fps) 3=Sharp-Crested Vee/Trap Weir (Weir Controls 9.93 cfs @ 3.04 fps) PRE_ Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 100 ❑ Inf.. p Pnmary Time (hours) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 101 Summary for Pond 11 P: BERKMAR OVERLOOK POND WP0201900050 Inflow Area = 7.430 ac, 0.00% Impervious, Inflow Depth > 6.45" for 100 year event Inflow = 78.54 cfs @ 11.98 hrs, Volume= 3.996 of Outflow = 72.87 cfs @ 12.01 hrs, Volume= 3.989 af, Atten= 7%, Lag= 1.9 min Primary = 72.87 cfs @ 12.01 hrs, Volume= 3.989 of Routed to Link 11 L : WP0201900050 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 525.86' @ 12.01 hrs Surf.Area= 7,347 sf Storage= 23,477 cf Plug -Flow detention time= 20.2 min calculated for 3.987 of (100% of inflow) Center -of -Mass det. time= 19.0 min ( 816.7 - 797.7 ) Volume Invert Avail.Storage Storage Description #1 518.00' 24,528 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 518.00 37 0 0 520.00 964 1,001 1,001 522.00 2,647 3,611 4,612 524.00 4,867 7,514 12,126 526.00 7,535 12,402 24,528 Device Routing Invert Outlet Devices #1 Primary 518.00' 18.0" Round RCP -Round 18" L= 119.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 518.00' / 514.00' S= 0.0336 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #2 Device 1 518.00' 6.0" Vert. Low -Flow Orifice C= 0.500 Limited to weir flow at low heads #3 Device 1 522.00' 9.0" Vert. Mid -Flow Orifice C= 0.500 Limited to weir flow at low heads #4 Device 1 523.00' 12.6' long Riser 2 End Contraction(s) #5 Primary 524.50' 12.0' long x 25.0' breadth Emergency Spillway Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=72.75 cfs @ 12.01 hrs HW=525.86' (Free Discharge) 1=RCP_Round 18" (Inlet Controls 22.68 cfs @ 12.84 fps) Low -Flow Orifice (Passes < 2.17 cfs potential flow) q-Riser Mid-Flow Orifice (Passes< 3.31 cfs potential flow) (Passes < 189.92 cfs potential flow) S=Emergency Spillway (Weir Controls 50.06 cfs @ 3.08 fps) PRE_ Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 102 Pond 11P: BERKMAR OVERLOOK POND WPO201900050 Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) PRE_ Developed _Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 103 Summary for Link 10L: WPO201800030 Analysis Point Inflow Area = 26.310 ac, 32.76% Impervious, Inflow Depth > 5.40" for 100 year event Inflow = 229.35 cfs @ 12.00 hrs, Volume= 11.838 of Primary = 229.35 cfs @ 12.00 hrs, Volume= 11.838 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 10L: WPO201800030 Analysis Point Hydrograph ® Inflow Q Primary TRIG (houm) PRE_ Developed _Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 104 Summary for Link 11 L: WP0201900050 Analysis Point Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 6.43" for 100 year event Inflow = 82.37 cfs @ 12.01 hrs, Volume= 4.545 of Primary = 82.37 cfs @ 12.01 hrs, Volume= 4.545 af, Atten= 0%, Lag= 0.0 min Routed to Reach 15R : Open Channel Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 11 L: WP0201900050 Analysis Point Hydrograph ■ Inflow ■ Primary Time (hous) PRE_ Developed _Berkmar Type II 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 105 Summary for Link 12L: Combined Upstream to Facility Inflow Area = 64.250 ac, 45.56% Impervious, Inflow Depth > 6.38" for 100 year event Inflow = 603.06 cfs @ 11.99 hrs, Volume= 34.136 of Primary = 603.06 cfs @ 11.99 hrs, Volume= 34.136 af, Atten= 0%, Lag= 0.0 min Routed to Pond 7P : Existing SWM Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 12L: Combined Upstream to Facility Hydrograph ■ Inflov ■ Primary Tlna (houm) 1S � Lowes + CfiickfilA 2$ — Keglers 6S POST_Berkmar Self Storage WPO202200032 18S Harvest Moon + Upstream 13S ASPCA AREA TO EX 3P SWM SPCA qX SWIM 11$ �Illj SPCA AREA TO EX BID 8S 2P SPCA AREA F TO 10 IX B10 ACILIN 9P V SWIM A /DETENTION) SPCA AREA H TO SPCA SWIMA SWMB SWMB SYSTEM 01 (C EM 02 (CMP DETENTION) 12S 1OL 12S SPCA Area 4 - PO201800030 Ex. Dev. to West Upstream Analysis Point / 17$ ,VCDC into Pipe 11L v 1 :d Up tream to WPO2019000 Factli Analysis Point 14S Open pace around Facility 7P Modified SWM Facility co) LOD - POST Subca Reach and Link 5S West Berkmar Inlets Berkm it Overlook DA E BERKMAR OVERLOOK POND WPO201900050 WPO201900050 POST —Developed — Berkmar Prepared by {enter yur company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 2 Rainfall Events Listing (selected events) Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 1 year Type II 24-hr Default 24.00 1 3.01 2 2 10 year Type II 24-hr Default 24.00 1 5.50 2 3 100 year Type II 24-hr Default 24.00 1 9.02 2 POST —Developed — Berkmar Prepared by {enter yur company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 3 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 15.665 61 >75% Grass cover, Good, HSG B (0, 1 S, 2S, 5S, 6S, 7S, 8S, 10S, 11 S, 12S, 13S, 14S, 18S) 7.430 79 Approved plan. Fully built. (4S) 36.042 98 Paved parking, HSG B (0, 1S, 2S, 5S, 6S, 7S, 8S, 10S, 12S, 13S, 17S, 18S) 15.520 55 Woods, Good, HSG B (7S, 12S, 14S) 0.320 58 Woods/grass comb., Good, HSG B (11S, 13S) 74.977 79 TOTAL AREA POST -Developed - Berkmar Prepared by {enter yur company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 4 Pipe Listing (all nodes) Line# Node Number In -Invert (feet) Out -Invert (feet) Length (feet) Slope (ft/ft) n Width (inches) Diam/Height (inches) Inside -Fill (inches) 1 2P 509.01 506.75 115.3 0.0196 0.013 0.0 15.0 0.0 2 3P 517.00 513.60 15.6 0.2179 0.012 0.0 15.0 0.0 3 7P 452.30 442.70 480.0 0.0200 0.013 0.0 36.0 0.0 4 7P 453.10 452.80 32.0 0.0094 0.013 0.0 18.0 0.0 5 9P 523.24 523.04 9.7 0.0206 0.013 0.0 15.0 0.0 6 10P 510.12 509.17 24.7 0.0385 0.013 0.0 15.0 0.0 7 11 P 518.00 514.00 119.0 0.0336 0.012 0.0 18.0 0.0 POST -Developed - Berkmar Type ll24-hr 1year Rainta11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HVdroCAD®10.10-7a s/n 08663 © 2021 HVdroCAD Software Solutions LLC Paoe 5 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 0: LOD - POST Runoff Area=5.470 ac 66.36% Impervious Runoff Depth>1.67" Tc=9.6 min CN=86 Runoff=14.24 cfs 0.760 of Subcatchment 1S: Lowes + ChickfilA Runoff Area=16.300 ac 86.87% Impervious Runoff Depth>2.26" Tc=6.0 min CN=93 Runoff=62.02 cfs 3.071 of Subcatchment 2S: Keglers Runoff Area=4.550 ac 80.88% Impervious Runoff Depth>2.08" Tc=6.0 min CN=91 Runoff=16.26 cfs 0.788 of Subcatchment 4S: Berkmar Overlook DA B Runoff Area=7.430 ac 0.00% Impervious Runoff Depth>1.19" Tc=7.2 min CN=79 Runoff=15.20 cfs 0.739 of Subcatchment 5S: West Berkmar Inlets Runoff Area=0.770 ac 27.27% Impervious Runoff Depth>0.76" Tc=6.0 min CN=71 Runoff=1.02 cfs 0.049 of Subcatchment 6S: POST-Berkmar Self Storage Runoff Area=4.950 ac 68.69% Impervious Runoff Depth>1.67" Tc=9.2 min CN=86 Runoff=13.08 cfs 0.688 of Subcatchment 7S: Ex Dev. to West Runoff Area=9.790 ac 60.16% Impervious Runoff Depth>1.45" Tc=8.0 min CN=83 Runoff=23.65 cfs 1.184 of Subcatchment 8S: SPCA AREA F TO SWM A Runoff Area=0.930 ac 54.84% Impervious Runoff Depth>1.32" Tc=6.0 min CN=81 Runoff=2.20 cfs 0.102 of Subcatchment 10S: SPCA AREA H TO SWM B Runoff Area=0.420 ac 88.10% Impervious Runoff Depth>2.36" Tc=6.0 min CN=94 Runoff=1.64 cfs 0.082 of Subcatchment 11S: SPCA AREA TO EX BIO Subcatchment 12S: 12S SPCA Area 4 - Subcatchment 13S: SPCA AREA TO EX SWM Runoff Area=0.430 ac 0.00% Impervious Runoff Depth>0.34" Tc=6.0 min CN=60 Runoff=0.18 cfs 0.012 of Runoff Area=12.430 ac 4.59% Impervious Runoff Depth>0.28" Tc=8.0 min CN=58 Runoff=3.14 cfs 0.286 of Runoff Area=2.310 ac 55.41 % Impervious Runoff Depth>1.32" Tc=8.0 min CN=81 Runoff=5.07 cfs 0.254 of Subcatchment 14S: Open Space around Facility Runoff Area=5.250 ac 0.00% Impervious Runoff Depth>0.22" Tc=6.0 min CN=56 Runoff=0.93 cfs 0.097 of Subcatchment 17S: FCDC into Pipe Runoff Area=0.280 ac 100.00% Impervious Runoff Depth>2.78" Tc=6.0 min CN=98 Runoff=1.19 cfs 0.065 of Subcatchment 18S: Harvest Moon + Upstream Runoff Area=3.667 ac 56.23% Impervious Runoff Depth>1.38" Tc=7.5 min CN=82 Runoff=8.61 cfs 0.423 of Pond 2P: EX BIO FACILITY Peak Elev=512.87' Storage=3,284 cf Inflow=2.75 cfs 0.265 of Outflow--2.38 cfs 0.196 of POST -Developed - Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 6 Pond 3P: SPCA EX SWM Peak Elev=518.94' Storage=0.047 of Inflow=5.07 cfs 0.254 of Outflow=2.66 cfs 0.253 of Pond 7P: Modified SWM Facility Peak Elev=468.11' Storage=90,976 cf Inflow=129.34 cfs 7.769 of Outflow=27.61 cfs 7.765 of Pond 9P: SPCA SWM B SYSTEM 02 (CMP Peak Elev=525.28' Storage=0.027 of Inflow=1.64 cfs 0.082 of Outflow=0.33 cfs 0.082 of Pond 10P: SPCA SWM A SYSTEM 01 (CMP Peak Elev=512.21' Storage=0.032 of Inflow=2.20 cfs 0.102 of Outflow=0.45 cfs 0.102 of Pond 11 P: BERKMAR OVERLOOK POND Peak Elev=523.24' Storage=8,754 cf Inflow=15.20 cfs 0.739 of 01flow=8.34 cfs 0.738 of Link 10L: WP0201800030 Analysis Point Inflow=27.02 cfs 1.851 of Primary=27.02 cfs 1.851 of Link 11 L: WP0201900050 Analysis Point Inflow=9.25 cfs 0.852 of Primary=9.25 cfs 0.852 of Link 12L: Combined Upstream to Facility Inflow=128.65 cfs 7.672 of Primary=128.65 cfs 7.672 of Total Runoff Area = 74.977 ac Runoff Volume = 8.599 of Average Runoff Depth = 1.38" 51.93% Pervious = 38.935 ac 48.07% Impervious = 36.042 ac POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 0: LOD - POST Runoff = 14.24 cfs @ 12.01 hrs, Volume= 0.760 af, Depth> 1.67" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 3.630 98 Paved parking, HSG B 1.840 61 >75% Grass cover, Good, HSG B 5.470 86 Weighted Average 1.840 33.64% Pervious Area 3.630 66.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, 15 14 13 12 11 10 n 9 3 8 0 LL 7 6 5' 4- 3 2_ 1 0' 0 Subcatchment 0: LOD - POST Hydrograph Type 11 24-hr 1 year Rainfall=3.01" Runoff Area=5.470 ac' Runoff Volume=0.760 of Runoff Depth>1.67" Tc=9.6 min CN=86 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ RunolF POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 1S: Lowes + ChickfilA Runoff = 62.02 cfs @ 11.97 hrs, Volume= 3.071 af, Depth> 2.26" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 14.160 98 Paved parking, HSG B 2.140 61 >75% Grass cover, Good, HSG B 16.300 93 Weighted Average 2.140 13.13% Pervious Area 14.160 86.87% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment 1S: Lowes + ChickfilA Hydrograph ❑ Runoff _......... 62.02 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=16.300 ac RunoffVolume=3.071 of Runoff Depth>2.26" Tc=6.0 min CN=93 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 29 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 2S: Keglers Runoff = 16.26 cfs @ 11.97 hrs, Volume= 0.788 af, Depth> 2.08" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 3.680 98 Paved parking, HSG B 0.870 61 >75% Grass cover, Good, HSG B 4.550 91 Weighted Average 0.870 19.12% Pervious Area 3.680 80.88% Impervious Area Tc Length Capacity Description Direct Entry, Subcatchment 2S: Keglers Hydrograph Time (hours) ❑ Runoff POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Runoff = 15.20 cfs @ 11.99 hrs, Volume= 0.739 af, Depth> 1.19" Routed to Pond 11P : BERKMAR OVERLOOK POND WP0201900050 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 7.430 79 Approved plan. Fully built. 7.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description i..\ If--+% /ff/ff\ (f+10 _N 1-fo\ 7.2 Direct Entry, Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Hydrograph C S Type II 24-hr 1 year Rainfall=3.01" Runoff Area=7.430 ac Runoff Volume=0.739 of Runoff Depth>1.19" ....... ........... ....... <....Tc=7.2 min 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff POST —Developed — Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment SS: West Berkmar Inlets Runoff = 1.02 cfs @ 11.98 hrs, Volume= 0.049 af, Depth> 0.76" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.210 98 Paved parking, HSG B 0.560 61 >75% Grass cover, Good, HSG B 0.770 71 Weighted Average 0.560 72.73% Pervious Area 0.210 27.27% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment SS: West Berkmar Inlets Hydrograph 1.02 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=0.770 ac Runoff Volume=0.049 of Runoff Depth>0.76" LL Tc=6.0 min CN=71 0 1 2 3 4 5 6 7 S 9 10 11 12 13 Time (hours) ❑ Runoff POST —Developed — OSTDeveloped_ Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 6S: POST Berkmar Self Storage WPO202200032 Runoff = 13.08 cfs @ 12.01 hrs, Volume= 0.688 af, Depth> 1.67" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 3.400 98 Paved parking, HSG B 1.550 61 >75% Grass cover, Good, HSG B 4.950 86 Weighted Average 1.550 31.31% Pervious Area 3.400 68.69% Impervious Area Tc Length 9.2 14 13 12 M 10 9 U 8 O 7 LL 6 5 Capacity Description Direct Entry, Subcatchment 6S: POST Berkmar Self Storage WPO202200032 Hydrograph 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) p Runoff POST —Developed — Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment 7S: Ex. Dev. to West Runoff = 23.65 cfs @ 12.00 hrs, Volume= 1.184 af, Depth> 1.45" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Descri 2.890 61 >75% Grass cover, Good, HSG B 1.010 55 Woods, Good, HSG B 5.890 98 Paved parking, HSG B 9.790 83 Weighted Average 3.900 39.84% Pervious Area 5.890 60.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 7S: Ex. Dev. to West Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 14 Summary for Subcatchment 8S: SPCA AREA F TO SWM A Runoff = 2.20 cfs @ 11.98 hrs, Volume= 0.102 af, Depth> 1.32" Routed to Pond 10P : SPCA SWM A SYSTEM 01 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.510 98 Paved parking, HSG B 0.420 61 >75% Grass cover, Good, HSG B 0.930 81 Weighted Average 0.420 45.16% Pervious Area 0.510 54.84% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, 1 Subcatchment 8S: SPCA AREA F TO SWM A Hydrograph 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Time (hours) 24 ❑ Runoff POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment 10S: SPCA AREA H TO SWM B Runoff = 1.64 cfs @ 11.97 hrs, Volume= 0.082 af, Depth> 2.36" Routed to Pond 9P : SPCA SWM B SYSTEM 02 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.050 61 >75% Grass cover, Good, HSG B 0.420 94 Weighted Average 0.050 11.90% Pervious Area 0.370 88.10% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment 10S: SPCA AREA H TO SWM B Hydrograph ❑Runoff 1.64 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=0.420 ac Runoff Volume=0.082 of Runoff Depth>2.36" Tc=6.0 min CN=94 0- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2 „2 , .4 2 3 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 16 Summary for Subcatchment 11S: SPCA AREA TO EX BIO Runoff = 0.18 cfs @ 12.00 hrs, Volume= 0.012 af, Depth> 0.34" Routed to Pond 2P : FCC BIO FACILITY Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.250 61 >75% Grass cover, Good, HSG B 0.180 58 Woods/grass comb., Good, HSG B 0.430 60 Weighted Average 0.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: SPCA AREA TO EX BIO Hydrograph ❑ Runoff 9 1 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 29 21 22 23 24 Time (hours) POST —Developed — Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 17 Summary for Subcatchment 12S: 12S SPCA Area 4 - Upstream Runoff = 3.14 cfs @ 12.04 hrs, Volume= 0.286 af, Depth> 0.28" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.570 98 Paved parking, HSG B 1.290 61 >75% Grass cover, Good, HSG B 10.570 55 Woods, Good, HSG B 12.430 58 Weighted Average 11.860 95.41 % Pervious Area 0.570 4.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 12S: 12S SPCA Area 4 - Upstream Hydrograph 3.14 cfs 3- Type II 24-hr 1 year Rainfall=3.01" Runoff Area=12.430 ac Runoff Volume=0.286 of 2-Runoff Depth>0.28" Tc=8.0 min CN=58 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff POST —Developed — Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 18 Summary for Subcatchment 13S: SPCA AREA TO EX SWM Runoff = 5.07 cfs @ 12.00 hrs, Volume= 0.254 af, Depth> 1.32" Routed to Pond 3P : SPCA EX SWM Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 1.280 98 Paved parking, HSG B 0.890 61 >75% Grass cover, Good, HSG B 0.140 58 Woods/grass comb., Good, HSG B 2.310 81 Weighted Average 1.030 44.59% Pervious Area 1.280 55.41 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 13S: SPCA AREA TO EX SWM Hydrograph '. '. ❑Runoff _....... 5.07 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=2.310 ac Runoff Volume=0.254 of 3- I Runoff Depth>1.32" Tc=8.0 min 2=1 I I) CN=81 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type I/ 24-hr 1 year Rainfall=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 19 Summary for Subcatchment US: Open Space around Facility Runoff = 0.93 cfs @ 12.02 hrs, Volume= 0.097 af, Depth> 0.22" Routed to Pond 7P : Modified SWIM Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 1.310 61 >75% Grass cover, Good, HSG B 3.940 55 Woods, Good, HSG B 5.250 56 Weighted Average 5.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 14S: Open Space around Facility Hydrograph 0.9 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=5.250 ac Runoff Volume=0.097 of Runoff Depth>0.22' Tc=6.0 min CN=56 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Time (hours) ❑ Runoff POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 20 Summary for Subcatchment 17S: FCDC into Pipe Runoff = 1.19 cfs @ 11.97 hrs, Volume= 0.065 af, Depth> 2.78" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 0.280 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.280 98 Weighted Average 0.280 100.00% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 17S: FCDC into Pipe Hydrograph ❑ Runoff 1.19 cfs Type II 24-hr 1 year Rainfall=3.01" Runoff Area=0.280 ac Runoff Volume=0.065 of Rrrnnff nanfh57 7R" Tc=6.0 min I I U CN=98 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 21 Summary for Subcatchment 18S: Harvest Moon + Upstream Runoff = 8.61 cfs @ 11.99 hrs, Volume= 0.423 af, Depth> 1.38" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 year Rainfall=3.01" Area (ac) CN Description 2.062 98 Paved parking, HSG B 1.605 61 >75% Grass cover, Good, HSG B 3.667 82 Weighted Average 1.605 43.77% Pervious Area 2.062 56.23% Impervious Area Tc Length Capacity Description /-fa % 7.5 Direct Entry, 1 Subcatchment 18S: Harvest Moon + Upstream Hydrograph 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff POST -Developed - Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 22 Summary for Pond 2P: EX BIO FACILITY Inflow Area = 2.740 ac, 46.72% Impervious, Inflow Depth > 1.16" for 1 year event Inflow = 2.75 cfs @ 12.08 hrs, Volume= 0.265 of Outflow = 2.38 cfs @ 12.23 hrs, Volume= 0.196 af, Atten= 13%, Lag= 8.8 min Primary = 2.38 cfs @ 12.23 hrs, Volume= 0.196 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 512.87' @ 12.23 hrs Surf.Area= 1,800 sf Storage= 3,284 cf Plug -Flow detention time= 148.9 min calculated for 0.196 of (74% of inflow) Center -of -Mass det. time= 50.4 min ( 901.2 - 850.8 ) Volume Invert Avail.Storage Storage Description #1 509.40' 8,940 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic -feet) (cubic -feet) 509.40 1,800 0.0 0 0 510.00 1,800 25.0 270 270 512.00 1,800 40.0 1,440 1,710 513.00 1,800 100.0 1,800 3,510 514.00 2,655 100.0 2,228 5,738 515.00 3,750 100.0 3,203 8,940 Device Routing Invert Outlet Devices #1 Primary 509.01' 15.0" Round EX 15 CPP L= 115.3' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 509.01' / 506.75' S= 0.0196 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.23 sf #2 Device 1 512.70' 30.0" x 30.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.38 cfs @ 12.23 hrs HW=512.87' (Free Discharge) L1=EX 15 CPP (Passes 2.38 cfs of 8.40 cfs potential flow) t2=Riser (Weir Controls 2.38 cfs @ 1.36 fps) POST —Developed — Berkmar Type ll24-hr 1 year Rainfa&3. 01 " Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 23 Pond 2P: EX BIO FACILITY Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 1 year Rainfall=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 24 Summary for Pond 3P: SPCA EX SWM [921 Warning: Device #3 is above defined storage Inflow Area = 2.310 ac, 55.41 % Impervious, Inflow Depth > 1.32" for 1 year event Inflow = 5.07 cfs @ 12.00 hrs, Volume= 0.254 of Outflow = 2.66 cfs @ 12.09 hrs, Volume= 0.253 af, Atten= 47%, Lag= 5.8 min Primary = 2.66 cfs @ 12.09 hrs, Volume= 0.253 of Routed to Pond 2P : EX BIO FACILITY Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 518.94' @ 12.09 hrs Surf.Area= 0.031 ac Storage= 0.047 of Plug -Flow detention time= 9.5 min calculated for 0.253 of (100% of inflow) Center -of -Mass det. time= 7.3 min ( 847.1 - 839.8) Volume Invert Avail.Storaoe Storage Description #1 517.00' 0.097 of 48.0" Round RCP —Round 48" L= 335.0' Device Routing Invert Outlet Devices #1 Primary 517.00' 15.0" Round RCP —Round 15" L= 15.6' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 517.00' / 513.60' S= 0.2179 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 517.00' 9.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 522.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.66 cfs @ 12.09 hrs HW=518.94' (Free Discharge) L1=RCP_Round 15" (Passes 2.66 cfs of 9.24 cfs potential flow) tZ=Orifice/Grate (Orifice Controls 2.66 cfs @ 6.03 fps) 3=Orifice/Grate ( Controls 0.00 cfs) POST Developed_Berkmar Type 11 24-hr 1 year Rainfall=3.01 " Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 25 Pond 3P: SPCA EX SWM Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST -Developed - Berkmar Type 1124-hr 1year Rainfa&3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 26 Summary for Pond 7P: Modified SWM Facility Inflow Area = 69.507 ac, 46.63% Impervious, Inflow Depth > 1.34" for 1 year event Inflow = 129.34 cfs @ 11.98 hrs, Volume= 7.769 of Outflow = 27.61 cfs @ 12.23 hrs, Volume= 7.765 af, Atten= 79%, Lag= 14.6 min Primary = 27.61 cfs @ 12.23 hrs, Volume= 7.765 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 468.11' @ 12.23 hrs Surf.Area= 23,098 sf Storage= 90,976 cf Plug -Flow detention time= 23.8 min calculated for 7.762 of (100% of inflow) Center -of -Mass det. time= 23.4 min ( 846.5 - 823.1 ) Volume Invert Avail.Storage Storage Description #1 458.00' 689,722 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 458.00 100 0 0 460.00 1,452 1,552 1,552 462.00 5,111 6,563 8,115 464.00 10,317 15,428 23,543 466.00 15,977 26,294 49,837 468.00 22,633 38,610 88,447 470.00 31,034 53,667 142,114 472.00 39,369 70,403 212,517 474.00 48,481 87,850 300,367 476.00 58,977 107,458 407,825 478.00 70,278 129,255 537,080 480.00 82,364 152,642 689,722 Device Routing Invert Outlet Devices #1 Primary 452.30' 36.0" Round RCP -Round 36" L= 480.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 452.30' / 442.70' S= 0.0200 7' Cc= 0.900 n= 0.013, Flow Area= 7.07 sf #2 Device 1 471.36' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 453.10' 18.0" Round RCP -Round 18" L= 32.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 453.10' / 452.80' S= 0.0094 '/' Cc= 0.900 n= 0.013, Flow Area= 1.77 sf #4 Device 3 458.00' 18.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Device 3 468.00' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #6 Primary 479.50' 50.0' long x 10.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 POST —Developed — Berkmar Type 11 24-hr 1 year Rainfall=3.01" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 27 OutFlow Max=27.54 cfs @ 12.23 hrs HW=468.11' (Free Discharge) P_Round 36" (Passes 27.54 cfs of 120.28 cfs potential flow) Orifice/Grate ( Controls 0.00 cfs) RCP Round 18" (Passes 27.54 cfs of 32.13 cfs potential flow) ,4=Orifice/Grate (Orifice Controls 26.03 cfs @ 14.73 fps) -5=Orifice/Grate (Weir Controls 1.51 cfs @ 1.09 fps) )ad -Crested Rectangular Weir ( Controls 0.00 cfs) Pond 7P: Modified SWM Facility Hydrograph ❑ Inflow ❑ Pnmary Time (hours) POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 28 Summary for Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Inflow Area = 0.420 ac, 88.10% Impervious, Inflow Depth > 2.36" for 1 year event Inflow = 1.64 cfs @ 11.97 hrs, Volume= 0.082 of Outflow = 0.33 cfs @ 12.13 hrs, Volume= 0.082 af, Atten= 80%, Lag= 9.8 min Primary = 0.33 cfs @ 12.13 hrs, Volume= 0.082 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 525.28' @ 12.13 hrs Surf.Area= 0.018 ac Storage= 0.027 of Plug -Flow detention time= 26.5 min calculated for 0.082 of (100% of inflow) Center -of -Mass det. time= 26.1 min ( 811.2 - 785.1 ) Volume Invert Avail.Storage Storage Description #1 523.24' 0.074 of 60.0" Round RCP -Round 60" L= 165.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 523.24' 15.0" Round RCP -Round 16' L= 9.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 523.24' / 523.04' S= 0.0206 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 523.24' 3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 527.40' 3.7' long Sharp -Crested Rectangular Weir 0 End Contraction(s) Primary OutFlow Max=0.33 cfs @ 12.13 hrs HW=525.28' (Free Discharge) t1=RCP_Round 15" (Passes 0.33 cfs of 8.51 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.33 cfs @ 6.66 fps) 3-Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) POST —Developed — Berkmar Type 1124-hr 1 year Rainfa&3. 01 " Prepared by {enter yur company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 29 Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Hydrograph ❑ Inflow 1.64 Cfs ❑ Primary Inflow Area=0.420 ac Peak Elev=525.28' j Storage=0.027 of 0 LL WMA 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST -Developed - Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 30 Summary for Pond 10P: SPCA SWM A SYSTEM 01 (CMP DETENTION) Inflow Area = 0.930 ac, 54.84% Impervious, Inflow Depth > 1.32" for 1 year event Inflow = 2.20 cfs @ 11.98 hrs, Volume= 0.102 of Outflow = 0.45 cfs @ 12.14 hrs, Volume= 0.102 af, Atten= 80%, Lag= 10.0 min Primary = 0.45 cfs @ 12.14 hrs, Volume= 0.102 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 512.21' @ 12.14 hrs Surf.Area= 0.022 ac Storage= 0.032 of Plug -Flow detention time= 24.0 min calculated for 0.102 of (100% of inflow) Center -of -Mass det. time= 23.2 min ( 861.6 - 838.3) Volume Invert Avail.Storage Storage Description #1 510.12' 0.133 of 84.0" Round CMP_Round W' L= 150.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 510.12' 15.0" Round RCP -Round 15" L= 24.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 510.12' / 509.17' S= 0.0385 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 510.12' 3.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 516.56' 3.8' long Sharp -Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=0.45 cfs @ 12.14 hrs HW=512.21' (Free Discharge) t1=RCP_Round 15" (Passes 0.45 cfs of 9.76 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.45 cfs @ 6.72 fps) 3-Sharp-Crested Vee/Trap Weir ( Controls 0.00 cfs) POST —Developed — Berkmar Type ll24-hr 1 year Rainfa&3. 01 " Prepared by {enter yur company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 31 Pond 10P: SPCA SWM A SYSTEM 01 (CMP DETENTION) Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST -Developed - Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 32 Summary for Pond 11 P: BERKMAR OVERLOOK POND WP0201900050 Inflow Area = 7.430 ac, 0.00% Impervious, Inflow Depth > 1.19" for 1 year event Inflow = 15.20 cfs @ 11.99 hrs, Volume= 0.739 of Outflow = 8.34 cfs @ 12.08 hrs, Volume= 0.738 af, Atten= 45%, Lag= 5.3 min Primary = 8.34 cfs @ 12.08 hrs, Volume= 0.738 of Routed to Link 11 L : WP0201900050 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 523.24' @ 12.08 hrs Surf.Area= 4,025 sf Storage= 8,754 cf Plug -Flow detention time= 25.1 min calculated for 0.738 of (100% of inflow) Center -of -Mass det. time= 24.5 min ( 870.3 - 845.8 ) Volume Invert Avail.Storage Storage Description #1 518.00' 24,528 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 518.00 37 0 0 520.00 964 1,001 1,001 522.00 2,647 3,611 4,612 524.00 4,867 7,514 12,126 526.00 7,535 12,402 24,528 Device Routing Invert Outlet Devices #1 Primary 518.00' 18.0" Round RCP -Round 18" L= 119.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 518.00' / 514.00' S= 0.0336 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #2 Device 1 518.00' 6.0" Vert. Low -Flow Orifice C= 0.500 Limited to weir flow at low heads #3 Device 1 522.00' 9.0" Vert. Mid -Flow Orifice C= 0.500 Limited to weir flow at low heads #4 Device 1 523.00' 12.6' long Riser 2 End Contraction(s) #5 Primary 524.50' 12.0' long x 25.0' breadth Emergency Spillway Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=8.27 cfs @ 12.08 hrs HW=523.24' (Free Discharge) 1=RCP_Round 18" (Passes 8.27 cfs of 18.03 cfs potential flow) Low -Flow Orifice (Orifice Controls 1.76 cfs @ 8.96 fps) q-_-Riser Mid-Flow Orifice (Orifice Controls 1.65 cfs @ 3.73 fps) (Weir Controls 4.86 cfs @ 1.61 fps) S=Emergency Spillway ( Controls 0.00 cfs) POST Developed_Berkmar Type 11 24-hr 1 year Rainfall=3.01 " Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 33 Pond 11P: BERKMAR OVERLOOK POND WPO201900050 Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 34 Summary for Link 10L: WPO201800030 Analysis Point Inflow Area = 26.310 ac, 32.76% Impervious, Inflow Depth > 0.84" for 1 year event Inflow = 27.02 cfs @ 12.01 hrs, Volume= 1.851 of Primary = 27.02 cfs @ 12.01 hrs, Volume= 1.851 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 10L: WPO201800030 Analysis Point Hydrograph ■ Inflow ■ Primary Time (hours) POST —Developed — Berkmar Type ll24-hr 1year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 35 Summary for Link 11 L: WPO201900050 Analysis Point Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 1.21" for 1 year event Inflow = 9.25 cfs @ 12.07 hrs, Volume= 0.852 of Primary = 9.25 cfs @ 12.07 hrs, Volume= 0.852 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 11 L: WPO201900050 Analysis Point Hydrograph ■ Inflow ■ Primary Time (hours) POST —Developed — Berkmar Type 11 24-hr 1 year Rainfa11=3.01" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 36 Summary for Link 12L: Combined Upstream to Facility Inflow Area = 64.257 ac, 50.44% Impervious, Inflow Depth > 1.43" for 1 year event Inflow = 128.65 cfs @ 11.98 hrs, Volume= 7.672 of Primary = 128.65 cfs @ 11.98 hrs, Volume= 7.672 af, Atten= 0%, Lag= 0.0 min Routed to Pond 7P : Modified SWIM Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 12L: Combined Upstream to Facility Hydrograph ■ Inflow ■ Primary Thm (houm) POST -Developed - Berkmar Type 1124-hr 10 year Rainta11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HVdroCAD®10.10-7a s/n 08663 © 2021 HVdroCAD Software Solutions LLC Paoe 37 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 0: LOD - POST Runoff Area=5.470 ac 66.36% Impervious Runoff Depth>3.93" Tc=9.6 min CN=86 Runoff=32.47 cfs 1.790 of Subcatchment 1S: Lowes + ChickfilA Runoff Area=16.300 ac 86.87% Impervious Runoff Depth>4.68" Tc=6.0 min CN=93 Runoff=122.41 cfs 6.363 of Subcatchment 2S: Keglers Runoff Area=4.550 ac 80.88% Impervious Runoff Depth>4.46" Tc=6.0 min CN=91 Runoff=33.27 cfs 1.692 of Subcatchment 4S: Berkmar Overlook DA B Runoff Area=7.430 ac 0.00% Impervious Runoff Depth>3.23" Tc=7.2 min CN=79 Runoff=40.64 cfs 2.001 of Subcatchment 5S: West Berkmar Inlets Runoff Area=0.770 ac 27.27% Impervious Runoff Depth>2.50" Tc=6.0 min CN=71 Runoff=3.45 cfs 0.160 of Subcatchment 6S: POST-Berkmar Self Storage Runoff Area=4.950 ac 68.69% Impervious Runoff Depth>3.93" Tc=9.2 min CN=86 Runoff=29.80 cfs 1.620 of Subcatchment 7S: Ex Dev. to West Runoff Area=9.790 ac 60.16% Impervious Runoff Depth>3.62" Tc=8.0 min CN=83 Runoff=57.50 cfs 2.956 of Subcatchment 8S: SPCA AREA F TO SWM A Runoff Area=0.930 ac 54.84% Impervious Runoff Depth>3.43" Tc=6.0 min CN=81 Runoff=5.58 cfs 0.266 of Subcatchment 10S: SPCA AREA H TO SWM B Runoff Area=0.420 ac 88.10% Impervious Runoff Depth>4.80" Tc=6.0 min CN=94 Runoff=3.19 cfs 0.168 of Subcatchment 11S: SPCA AREA TO EX BIO Subcatchment 12S: 12S SPCA Area 4 - Subcatchment 13S: SPCA AREA TO EX SWM Runoff Area=0.430 ac 0.00% Impervious Runoff Depth>1.60" Tc=6.0 min CN=60 Runoff=1.21 cfs 0.057 of Runoff Area=12.430 ac 4.59% Impervious Runoff Depth>1.45" Tc=8.0 min CN=58 Runoff=28.75 cfs 1.501 of Runoff Area=2.310 ac 55.41 % Impervious Runoff Depth>3.42" Tc=8.0 min CN=81 Runoff=12.93 cfs 0.659 of Subcatchment 14S: Open Space around Facility Runoff Area=5.250 ac 0.00% Impervious Runoff Depth>1.31" Tc=6.0 min CN=56 Runoff=11.71 cfs 0.572 of Subcatchment 17S: FCDC into Pipe Runoff Area=0.280 ac 100.00% Impervious Runoff Depth>5.26" Tc=6.0 min CN=98 Runoff=2.19 cfs 0.123 of Subcatchment 18S: Harvest Moon + Upstream Runoff Area=3.667 ac 56.23% Impervious Runoff Depth>3.52" Tc=7.5 min CN=82 Runoff=21.41 cfs 1.077 of Pond 2P: EX BIO FACILITY Peak Elev=513.64' Storage=4,834 cf Inflow=22.01 cfs 0.715 of Outflow=9.33 cfs 0.646 of POST -Developed - Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 38 Pond 3P: SPCA EX SWM Peak Elev=527.63' Storage=0.097 of Inflow=12.93 cfs 0.659 of Outflow=20.84 cfs 0.658 of Pond 7P: Modified SWM Facility Peak Elev=472.96' Storage=252,293 cf Inflow=335.30 cfs 19.142 of Outflow=113.61 cfs 19.134 of Pond 9P: SPCA SWM B SYSTEM 02 (CMP Peak Elev=527.15' Storage=0.061 of Inflow=3.19 cfs 0.168 of Outflow=0.46 cfs 0.168 of Pond 10P: SPCA SWM A SYSTEM 01 (CMP Peak Elev=515.23' Storage=0.102 of Inflow=5.58 cfs 0.266 of Outflow=0.72 cfs 0.265 of Pond 11 P: BERKMAR OVERLOOK POND Peak Elev=524.93' Storage=17,207 cf Inflow=40.64 cfs 2.001 of Outflow=30.19 cfs 1.999 of Link 10L: WP0201800030 Analysis Point Inflow=95.89 cfs 5.536 of Primary=95.89 cfs 5.536 of Link 11 L: WP0201900050 Analysis Point Inflow=33.78 cfs 2.282 of Primary=33.78 cfs 2.282 of Link 12L: Combined Upstream to Facility Inflow=323.59 cfs 18.570 of Primary=323.59 cfs 18.570 of Total Runoff Area = 74.977 ac Runoff Volume = 21.005 of Average Runoff Depth = 3.36" 51.93% Pervious = 38.935 ac 48.07% Impervious = 36.042 ac POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 39 Summary for Subcatchment 0: LOD - POST Runoff = 32.47 cfs @ 12.01 hrs, Volume= 1.790 af, Depth> 3.93" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 3.630 98 Paved parking, HSG B 1.840 61 >75% Grass cover, Good, HSG B 5.470 86 Weighted Average 1.840 33.64% Pervious Area 3.630 66.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, ■ RunoiF Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 40 Summary for Subcatchment 1S: Lowes + ChickfilA Runoff = 122.41 cfs @ 11.97 hrs, Volume= 6.363 af, Depth> 4.68" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 14.160 98 Paved parking, HSG B 2.140 61 >75% Grass cover, Good, HSG B 16.300 93 Weighted Average 2.140 13.13% Pervious Area 14.160 86.87% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment 1S: Lowes + ChickfilA Hydrograph ❑ Runoff 130- 122.41 cfs 20 Type II 24-hr 10 year Rainfall=5.50" °° Runoff Area=16.300 ac 90- ' Runoff Volume=6.363 of 80- w Runoff Depth>4.68" LL 60- Tc=6.0 min 7 8 9 19 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time )hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 41 Summary for Subcatchment 2S: Keglers Runoff = 33.27 cfs @ 11.97 hrs, Volume= 1.692 af, Depth> 4.46" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 3.680 98 Paved parking, HSG B 0.870 61 >75% Grass cover, Good, HSG B 4.550 91 Weighted Average 0.870 19.12% Pervious Area 3.680 80.88% Impervious Area Tc Length Capacity Description Direct Entry, Subcatchment 2S: Keglers Hydrograph Time (hours) ❑ Runoff POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 42 Summary for Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Runoff = 40.64 cfs @ 11.99 hrs, Volume= 2.001 af, Depth> 3.23" Routed to Pond 11P : BERKMAR OVERLOOK POND WP0201900050 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 7.430 79 Approved plan. Fully built. 7.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 7.2 Direct Entry, Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 43 Summary for Subcatchment 5S: West Berkmar Inlets Runoff = 3.45 cfs @ 11.98 hrs, Volume= 0.160 af, Depth> 2.50" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.210 98 Paved parking, HSG B 0.560 61 >75% Grass cover, Good, HSG B 0.770 71 Weighted Average 0.560 72.73% Pervious Area 0.210 27.27% Impervious Area Tc Length 1 Capacity Description Direct Entry, Subcatchment 5S: West Berkmar Inlets Hydrograph ❑Runoff 3.45 cfs Type II 24-hr 10 year Rainfall=5.50" Runoff Area=0.770 ac Runoff Volume=0.160 of Runoff Depth>2.50" Tc=6.0 min CN=71 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time )hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 44 Summary for Subcatchment 6S: POST Berkmar Self Storage WPO202200032 Runoff = 29.80 cfs @ 12.01 hrs, Volume= 1.620 af, Depth> 3.93" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 3.400 98 Paved parking, HSG B 1.550 61 >75% Grass cover, Good, HSG B 4.950 86 Weighted Average 1.550 31.31% Pervious Area 3.400 68.69% Impervious Area Tc Length 9.2 Capacity Description Direct Entry, ■ RunoiF POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 45 Summary for Subcatchment 7S: Ex. Dev. to West Runoff = 57.50 cfs @ 11.99 hrs, Volume= 2.956 af, Depth> 3.62" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 2.890 61 >75% Grass cover, Good, HSG B 1.010 55 Woods, Good, HSG B 5.890 98 Paved parking, HSG B 9.790 83 Weighted Average 3.900 39.84% Pervious Area 5.890 60.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 7S: Ex. Dev. to West Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 46 Summary for Subcatchment 8S: SPCA AREA F TO SWM A Runoff = 5.58 cfs @ 11.97 hrs, Volume= 0.266 af, Depth> 3.43" Routed to Pond 10P : SPCA SWM A SYSTEM 01 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.510 98 Paved parking, HSG B 0.420 61 >75% Grass cover, Good, HSG B 0.930 81 Weighted Average 0.420 45.16% Pervious Area 0.510 54.84% Impervious Area Tc Length 2 1 Capacity Description Direct Entry, Subcatchment 8S: SPCA AREA F TO SWM A Hydrograph 5.58 cfs Type II 24-hr 10 year Rainfall=5.50" Runoff Area=0.930 ac Runoff Volume=0.266 of Runoff Depth>3.43" Tc=6.0 min CN=81 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 47 Summary for Subcatchment 10S: SPCA AREA H TO SWM B Runoff = 3.19 cfs @ 11.97 hrs, Volume= 0.168 af, Depth> 4.80" Routed to Pond 9P : SPCA SWM B SYSTEM 02 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.050 61 >75% Grass cover, Good, HSG B 0.420 94 Weighted Average 0.050 11.90% Pervious Area 0.370 88.10% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 10S: SPCA AREA H TO SWM B Hydrograph ❑ Runoff 3.19 cfs 3- Type II 24-hr 10 year Rainfall=5.50rr Runoff Area=0.420 ac V' Runoff Volume=0.168 of 2 RiiiinnfP nanfh5A Rno, LL Tc=6.0 min CN=94 3. 4. „5.., ,6,. 7�.. a. 9, ..1�0. 1,1 12 13 14 15 16 11., 1�8.. 1,9 .. 20 .21 2 2, ., 2 3 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 48 Summary for Subcatchment 11S: SPCA AREA TO EX BIO Runoff = 1.21 cfs @ 11.98 hrs, Volume= 0.057 af, Depth> 1.60" Routed to Pond 2P : FCC BIO FACILITY Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.250 61 >75% Grass cover, Good, HSG B 0.180 58 Woods/grass comb., Good, HSG B 0.430 60 Weighted Average 0.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: SPCA AREA TO EX BIO Hydrograph ❑ Runoff Type II 24-hr 10 year Rainfall=5.50" Runoff Area=0.430 ac Runoff Volume=0.057 of Runoff Depth>1.60" Tc=6.0 min CN=60 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 49 Summary for Subcatchment 12S: 12S SPCA Area 4 - Upstream Runoff = 28.75 cfs @ 12.01 hrs, Volume= 1.501 af, Depth> 1.45" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.570 98 Paved parking, HSG B 1.290 61 >75% Grass cover, Good, HSG B 10.570 55 Woods, Good, HSG B 12.430 58 Weighted Average 11.860 95.41 % Pervious Area 0.570 4.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 12S: 12S SPCA Area 4 - Upstream Hydrograph 30 ` 28.75 cfs 28- Type 11. 24-hr '... 26- 10 year Rainfall=5.50" 24 Runoff Area=12.430 ac 22 20 Runoff Volume=1.501 of 'a Runoff Depth>1.45'' 3 ,6- ,4 Tc=8.0 min 12-_. CN=58-- E 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runofi POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 50 Summary for Subcatchment 13S: SPCA AREA TO EX SWM Runoff = 12.93 cfs @ 11.99 hrs, Volume= 0.659 af, Depth> 3.42" Routed to Pond 3P : SPCA EX SWM Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Descri 1.280 98 Paved parking, HSG B 0.890 61 >75% Grass cover, Good, HSG B 0.140 58 Woods/grass comb., Good, HSG B 2.310 81 Weighted Average 1.030 44.59% Pervious Area 1.280 55.41 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 13S: SPCA AREA TO EX SWM Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 51 Summary for Subcatchment US: Open Space around Facility Runoff = 11.71 cfs @ 11.98 hrs, Volume= 0.572 af, Depth> 1.31" Routed to Pond 7P : Modified SWIM Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 1.310 61 >75% Grass cover, Good, HSG B 3.940 55 Woods, Good, HSG B 5.250 56 Weighted Average 5.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 6 Subcatchment 14S: Open Space around Facility Hydrograph .71 cfs Type II 24-hr 10 year Rainfall=5.50" Runoff Area=5.250 ac Runoff Volume=0.572 of Runoff Depth>1.31' Tc=6.0 min CN=56 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 52 Summary for Subcatchment 17S: FCDC into Pipe Runoff = 2.19 cfs @ 11.97 hrs, Volume= 0.123 af, Depth> 5.26" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 0.280 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.280 98 Weighted Average 0.280 100.00% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 17S: FCDC into Pipe Hydrograph ❑ Runoff 2.19 cfs Type II 24-hr 2 10 year Rainfall=5.50" Runoff Area=0.280 ac Runoff Volume=0.123 of Runoff Depth>5.26" Tc=6.0 min 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 53 Summary for Subcatchment 18S: Harvest Moon + Upstream Runoff = 21.41 cfs @ 11.99 hrs, Volume= 1.077 af, Depth> 3.52" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10 year Rainfall=5.50" Area (ac) CN Description 2.062 98 Paved parking, HSG B 1.605 61 >75% Grass cover, Good, HSG B 3.667 82 Weighted Average 1.605 43.77% Pervious Area 2.062 56.23% Impervious Area Tc Length Capacity Description 7.5 Direct Entry, Subcatchment 18S: Harvest Moon + Upstream Hydrograph ■ Runofi Time (hours) POST -Developed - Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 54 Summary for Pond 2P: EX BIO FACILITY [791 Warning: Submerged Pond 3P Primary device # 1 OUTLET by 0.04' Inflow Area = 2.740 ac, 46.72% Impervious, Inflow Depth > 3.13" for 10 year event Inflow = 22.01 cfs @ 12.00 hrs, Volume= 0.715 of Outflow = 9.33 cfs @ 12.07 hrs, Volume= 0.646 af, Atten= 58%, Lag= 4.1 min Primary = 9.33 cfs @ 12.07 hrs, Volume= 0.646 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 513.64' @ 12.07 hrs Surf.Area= 2,346 sf Storage= 4,834 cf Plug -Flow detention time= 70.0 min calculated for 0.646 of (90% of inflow) Center -of -Mass det. time= 21.5 min ( 845.9 - 824.3) Volume Invert Avail.Storage Storage Description #1 509.40' 8,940 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic -feet) (cubic -feet) 509.40 1,800 0.0 0 0 510.00 1,800 25.0 270 270 512.00 1,800 40.0 1,440 1,710 513.00 1,800 100.0 1,800 3,510 514.00 2,655 100.0 2,228 5,738 515.00 3,750 100.0 3,203 8,940 Device Routing Invert Outlet Devices #1 Primary 509.01' 15.0" Round EX 15 CPP L= 115.3' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 509.01' / 506.75' S= 0.0196 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.23 sf #2 Device 1 512.70' 30.0" x 30.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=9.33 cfs @ 12.07 hrs HW=513.64' (Free Discharge) t1=EX 15 CPP (Inlet Controls 9.33 cfs @ 7.60 fps) L2=Riser (Passes 9.33 cfs of 29.13 cfs potential flow) POST Developed_Berkmar Type/1 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 55 ❑ nnf. ❑ Primary POST -Developed - Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 56 Summary for Pond 3P: SPCA EX SWM [921 Warning: Device #3 is above defined storage [931 Warning: Storage range exceeded by 6.63' [881 Warning: Qout>Qin may require smaller dt or Finer Routing [851 Warning: Oscillations may require smaller dt or Finer Routing (severity=5) Inflow Area = 2.310 ac, 55.41 % Impervious, Inflow Depth > 3.42" for 10 year event Inflow = 12.93 cfs @ 11.99 hrs, Volume= 0.659 of Outflow = 20.84 cfs @ 12.00 hrs, Volume= 0.658 af, Atten= 0%, Lag= 0.4 min Primary = 20.84 cfs @ 12.00 hrs, Volume= 0.658 of Routed to Pond 2P : EX BIO FACILITY Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 527.63' @ 12.00 hrs Storage= 0.097 of Plug -Flow detention time= 9.7 min calculated for 0.658 of (100% of inflow) Center -of -Mass det. time= 8.2 min ( 820.9 - 812.7) Volume Invert Avail.Storage Storage Description #1 517.00' 0.097 of 48.0" Round RCP -Round 48" L= 335.0' Device Routing Invert Outlet Devices #1 Primary 517.00' 15.0" Round RCP -Round 15" L= 15.6' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 517.00' / 513.60' S= 0.2179 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 517.00' 9.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 522.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=20.81 cfs @ 12.00 hrs HW=527.62' (Free Discharge) L1=RCP_Round 15" (Passes 20.81 cfs of 25.47 cfs potential flow) t2=0rifice/Grate (Orifice Controls 6.81 cfs @ 15.41 fps) 3--Orifice/Grate (Orifice Controls 14.00 cfs @ 11.41 fps) POST —Developed — Berkmar Type 1124-hr 10 year Rainfa&5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 57 Pond 3P: SPCA EX SWM Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST -Developed - Berkmar Type 1124-hr 10 year Rainfa&5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 58 Summary for Pond 7P: Modified SWM Facility Inflow Area = 69.507 ac, 46.63% Impervious, Inflow Depth > 3.30" for 10 year event Inflow = 335.30 cfs @ 11.98 hrs, Volume= 19.142 of Outflow = 113.61 cfs @ 12.13 hrs, Volume= 19.134 af, Atten= 66%, Lag= 9.0 min Primary = 113.61 cfs @ 12.13 hrs, Volume= 19.134 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 472.96' @ 12.13 hrs Surf.Area= 43,731 sf Storage= 252,293 cf Plug -Flow detention time= 38.8 min calculated for 19.126 of (100% of inflow) Center -of -Mass det. time= 38.5 min ( 843.1 - 804.5) Volume Invert Avail.Storage Storage Description #1 458.00' 689,722 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 458.00 100 0 0 460.00 1,452 1,552 1,552 462.00 5,111 6,563 8,115 464.00 10,317 15,428 23,543 466.00 15,977 26,294 49,837 468.00 22,633 38,610 88,447 470.00 31,034 53,667 142,114 472.00 39,369 70,403 212,517 474.00 48,481 87,850 300,367 476.00 58,977 107,458 407,825 478.00 70,278 129,255 537,080 480.00 82,364 152,642 689,722 Device Routing Invert Outlet Devices #1 Primary 452.30' 36.0" Round RCP -Round 36" L= 480.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 452.30' / 442.70' S= 0.0200 7' Cc= 0.900 n= 0.013, Flow Area= 7.07 sf #2 Device 1 471.36' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 453.10' 18.0" Round RCP -Round 18" L= 32.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 453.10' / 452.80' S= 0.0094 '/' Cc= 0.900 n= 0.013, Flow Area= 1.77 sf #4 Device 3 458.00' 18.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Device 3 468.00' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #6 Primary 479.50' 50.0' long x 10.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 POST —Developed — Berkmar Type 11 24-hr 10 year Rainfall=5.50" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 59 OutFlow Max=113.64 cfs @ 12.13 hrs HW=472.96' (Free Discharge) P_Round 36" (Passes 113.64 cfs of 132.65 cfs potential flow) Orifice/Grate (Orifice Controls 76.45 cfs @ 6.08 fps) RCP Round 18" (Inlet Controls 37.19 cfs @ 21.05 fps) ,4=Orifice/Grate (Passes < 32.07 cfs potential flow) -5=Orifice/Grate (Passes < 134.71 cfs potential flow) )ad -Crested Rectangular Weir ( Controls 0.00 cfs) Pond 7P: Modified SWM Facility Hydrograph ■ Inflow ■ Primary Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 60 Summary for Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Inflow Area = 0.420 ac, 88.10% Impervious, Inflow Depth > 4.80" for 10 year event Inflow = 3.19 cfs @ 11.97 hrs, Volume= 0.168 of Outflow = 0.46 cfs @ 12.19 hrs, Volume= 0.168 af, Atten= 86%, Lag= 13.0 min Primary = 0.46 cfs @ 12.19 hrs, Volume= 0.168 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 527.15' @ 12.19 hrs Surf.Area= 0.016 ac Storage= 0.061 of Plug -Flow detention time= 46.3 min calculated for 0.168 of (100% of inflow) Center -of -Mass det. time= 45.7 min ( 812.3 - 766.5 ) Volume Invert Avail.Storage Storage Description #1 523.24' 0.074 of 60.0" Round RCP -Round 60" L= 165.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 523.24' 15.0" Round RCP -Round 16' L= 9.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 523.24' / 523.04' S= 0.0206 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 523.24' 3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 527.40' 3.7' long Sharp -Crested Rectangular Weir 0 End Contraction(s) Primary OutFlow Max=0.46 cfs @ 12.19 hrs HW=527.15' (Free Discharge) t1=RCP_Round 15" (Passes 0.46 cfs of 14.47 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.46 cfs @ 9.37 fps) 3-Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) POST —Developed — Berkmar Type 1124-hr 10 year Rainfa&5.50" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 61 Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST -Developed - Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 62 Summary for Pond 10P: SPCA SWM A SYSTEM 01 (CMP DETENTION) Inflow Area = 0.930 ac, 54.84% Impervious, Inflow Depth > 3.43" for 10 year event Inflow = 5.58 cfs @ 11.97 hrs, Volume= 0.266 of Outflow = 0.72 cfs @ 12.25 hrs, Volume= 0.265 af, Atten= 87%, Lag= 16.9 min Primary = 0.72 cfs @ 12.25 hrs, Volume= 0.265 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 515.23' @ 12.25 hrs Surf.Area= 0.022 ac Storage= 0.102 of Plug -Flow detention time= 54.6 min calculated for 0.265 of (100% of inflow) Center -of -Mass det. time= 53.8 min ( 865.0 - 811.1 ) Volume Invert Avail.Storage Storage Description #1 510.12' 0.133 of 84.0" Round CMP_Round W' L= 150.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 510.12' 15.0" Round RCP -Round 15" L= 24.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 510.12' / 509.17' S= 0.0385 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 510.12' 3.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 516.56' 3.8' long Sharp -Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=0.72 cfs @ 12.25 hrs HW=515.23' (Free Discharge) t1=RCP_Round 15" (Passes 0.72 cfs of 16.68 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.72 cfs @ 10.72 fps) 3-Sharp-Crested Vee/Trap Weir ( Controls 0.00 cfs) POST Developed_Berkmar Type/1 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 63 ❑ nnf. ❑ Primary POST -Developed - Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 64 Summary for Pond 11 P: BERKMAR OVERLOOK POND WP0201900050 Inflow Area = 7.430 ac, 0.00% Impervious, Inflow Depth > 3.23" for 10 year event Inflow = 40.64 cfs @ 11.99 hrs, Volume= 2.001 of Outflow = 30.19 cfs @ 12.05 hrs, Volume= 1.999 af, Atten= 26%, Lag= 3.7 min Primary = 30.19 cfs @ 12.05 hrs, Volume= 1.999 of Routed to Link 11 L : WP0201900050 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 524.93' @ 12.05 hrs Surf.Area= 6,103 sf Storage= 17,207 cf Plug -Flow detention time= 20.8 min calculated for 1.999 of (100% of inflow) Center -of -Mass det. time= 20.3 min ( 837.5 - 817.3 ) Volume Invert Avail.Storage Storage Description #1 518.00' 24,528 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 518.00 37 0 0 520.00 964 1,001 1,001 522.00 2,647 3,611 4,612 524.00 4,867 7,514 12,126 526.00 7,535 12,402 24,528 Device Routing Invert Outlet Devices #1 Primary 518.00' 18.0" Round RCP -Round 18" L= 119.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 518.00' / 514.00' S= 0.0336 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #2 Device 1 518.00' 6.0" Vert. Low -Flow Orifice C= 0.500 Limited to weir flow at low heads #3 Device 1 522.00' 9.0" Vert. Mid -Flow Orifice C= 0.500 Limited to weir flow at low heads #4 Device 1 523.00' 12.6' long Riser 2 End Contraction(s) #5 Primary 524.50' 12.0' long x 25.0' breadth Emergency Spillway Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=30.11 cfs @ 12.05 hrs HW=524.92' (Free Discharge) 1=RCP_Round 18" (Inlet Controls 21.14 cfs @ 11.96 fps) Low -Flow Orifice (Passes < 2.04 cfs potential flow) q-Riser Mid-Flow Orifice (Passes< 2.83 cfs potential flow) (Passes < 106.66 cfs potential flow) S=Emergency Spillway (Weir Controls 8.97 cfs @ 1.76 fps) POST Developed_Berkmar Type/1 24-hr 10 year Rainfall=5.50" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 65 Pond 11P: BERKMAR OVERLOOK POND WPO201900050 Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfall=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 66 Summary for Link 10L: WPO201800030 Analysis Point Inflow Area = 26.310 ac, 32.76% Impervious, Inflow Depth > 2.53" for 10 year event Inflow = 95.89 cfs @ 12.00 hrs, Volume= 5.536 of Primary = 95.89 cfs @ 12.00 hrs, Volume= 5.536 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 10L: WPO201800030 Analysis Point Hydrograph ■ Inflow ■ Primary Thm (houm) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfall=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 67 Summary for Link 11 L: WPO201900050 Analysis Point Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 3.23" for 10 year event Inflow = 33.78 cfs @ 12.04 hrs, Volume= 2.282 of Primary = 33.78 cfs @ 12.04 hrs, Volume= 2.282 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 11 L: WPO201900050 Analysis Point Hydrograph ■ Inflow ■ Primary Time (hours) POST —Developed — Berkmar Type 11 24-hr 10 year Rainfa11=5.50" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 68 Summary for Link 12L: Combined Upstream to Facility Inflow Area = 64.257 ac, 50.44% Impervious, Inflow Depth > 3.47" for 10 year event Inflow = 323.59 cfs @ 11.98 hrs, Volume= 18.570 of Primary = 323.59 cfs @ 11.98 hrs, Volume= 18.570 af, Atten= 0%, Lag= 0.0 min Routed to Pond 7P : Modified SWIM Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 12L: Combined Upstream to Facility Hydrograph ® Inflow Q Primary Thm (houm) POST -Developed - Berkmar Type II 24-hr 100 year Rainta11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HVdroCAD®10.10-7a s/n 08663 © 2021 HVdroCAD Software Solutions LLC Paoe 69 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 0: LOD - POST Runoff Area=5.470 ac 66.36% Impervious Runoff Depth>7.31" Tc=9.6 min CN=86 Runoff=58.25 cfs 3.332 of Subcatchment 1S: Lowes + ChickfilA Runoff Area=16.300 ac 86.87% Impervious Runoff Depth>8.17" Tc=6.0 min CN=93 Runoff=206.26 cfs 11.093 of Subcatchment 2S: Keglers Runoff Area=4.550 ac 80.88% Impervious Runoff Depth>7.92" Tc=6.0 min CN=91 Runoff=56.87 cfs 3.005 of Subcatchment 4S: Berkmar Overlook DA B Runoff Area=7.430 ac 0.00% Impervious Runoff Depth>6.45" Tc=7.2 min CN=79 Runoff=78.54 cfs 3.996 of Subcatchment 5S: West Berkmar Inlets Runoff Area=0.770 ac 27.27% Impervious Runoff Depth>5.47" Tc=6.0 min CN=71 Runoff=7.41 cfs 0.351 of Subcatchment 6S: POST-Berkmar Self Storage Runoff Area=4.950 ac 68.69% Impervious Runoff Depth>7.31" Tc=9.2 min CN=86 Runoff=53.40 cfs 3.015 of Subcatchment 7S: Ex Dev. to West Runoff Area=9.790 ac 60.16% Impervious Runoff Depth>6.94" Tc=8.0 min CN=83 Runoff=106.29 cfs 5.665 of Subcatchment 8S: SPCA AREA F TO SWM A Runoff Area=0.930 ac 54.84% Impervious Runoff Depth>6.70" Tc=6.0 min CN=81 Runoff=10.52 cfs 0.519 of Subcatchment 10S: SPCA AREA H TO SWM B Runoff Area=0.420 ac 88.10% Impervious Runoff Depth>8.29" Tc=6.0 min CN=94 Runoff=5.34 cfs 0.290 of Subcatchment 11S: SPCA AREA TO EX BIO Subcatchment 12S: 12S SPCA Area 4 - Subcatchment 13S: SPCA AREA TO EX SWM Runoff Area=0.430 ac 0.00% Impervious Runoff Depth>4.11" Tc=6.0 min CN=60 Runoff=3.17 cfs 0.147 of Runoff Area=12.430 ac 4.59% Impervious Runoff Depth>3.86" Tc=8.0 min CN=58 Runoff=79.90 cfs 4.000 of Runoff Area=2.310 ac 55.41 % Impervious Runoff Depth>6.70" Tc=8.0 min CN=81 Runoff=24.45 cfs 1.290 of Subcatchment 14S: Open Space around Facility Runoff Area=5.250 ac 0.00% Impervious Runoff Depth>3.62" Tc=6.0 min CN=56 Runoff=34.11 cfs 1.583 of Subcatchment 17S: FCDC into Pipe Runoff Area=0.280 ac 100.00% Impervious Runoff Depth>8.77" Tc=6.0 min CN=98 Runoff=3.61 cfs 0.205 of Subcatchment 18S: Harvest Moon + Upstream Runoff Area=3.667 ac 56.23% Impervious Runoff Depth>6.82" Tc=7.5 min CN=82 Runoff=39.98 cfs 2.085 of Pond 2P: EX BIO FACILITY Peak Elev=548.37' Storage=8,940 cf Inflow=29.71 cfs 1.434 of Outflow=29.04 cfs 1.365 of POST -Developed - Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 70 Pond 3P: SPCA EX SWM Peak Elev=531.82' Storage=0.097 of Inflow=24.45 cfs 1.290 of Outflow=26.60 cfs 1.287 of Pond 7P: Modified SWM Facility Peak Elev=478.14' Storage=546,979 cf Inflow=686.11 cfs 37.164 of Outflow=144.71 cfs 37.148 of Pond 9P: SPCA SWM B SYSTEM 02 (CMP Peak Elev=527.93' Storage=0.072 of Inflow=5.34 cfs 0.290 of Outflow=5.20 cfs 0.290 of Pond 10P: SPCA SWM A SYSTEM 01 (CMP Peak Elev=517.42' Storage=0.133 of Inflow=10.52 cfs 0.519 of Outflow=10.80 cfs 0.519 of Pond 11 P: BERKMAR OVERLOOK POND Peak Elev=525.86' Storage=23,477 cf Inflow=78.54 cfs 3.996 of Outflow=72.87 cfs 3.989 of Link 10L: WP0201800030 Analysis Point Inflow=229.35 cfs 11.838 of Primary=229.35 cfs 11.838 of Link 11 L: WP0201900050 Analysis Point Inflow=82.37 cfs 4.545 of Primary=82.37 cfs 4.545 of Link 12L: Combined Upstream to Facility Inflow=652.62 cfs 35.581 of Primary=652.62 cfs 35.581 of Total Runoff Area = 74.977 ac Runoff Volume = 40.576 of Average Runoff Depth = 6.49" 51.93% Pervious = 38.935 ac 48.07% Impervious = 36.042 ac POST —Developed — Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 71 Summary for Subcatchment 0: LOD - POST Runoff = 58.25 cfs @ 12.01 hrs, Volume= 3.332 af, Depth> 7.31" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 3.630 98 Paved parking, HSG B 1.840 61 >75% Grass cover, Good, HSG B 5.470 86 Weighted Average 1.840 33.64% Pervious Area 3.630 66.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Subcatchment 0: LOD - POST Hydrograph 65 60.. 58.. Type 11 24-hr 55 100 year Rainfall=9.02" 50.--. 45.- Runoff Area=5.470 ac' 40 Runoff Volume=3.332 of 35 Runoff Depth>7.31'. 30 Tc=9.6 min 25' CN=86------ - --- - ------''... -- 10 5 01. 0 1 2 3 4 5 6 7 8 9 10 11 12 1I3 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ RunofF POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 72 Summary for Subcatchment 1S: Lowes + ChickfilA Runoff = 206.26 cfs @ 11.97 hrs, Volume= 11.093 af, Depth> 8.17" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 14.160 98 Paved parking, HSG B 2.140 61 >75% Grass cover, Good, HSG B 16.300 93 Weighted Average 2.140 13.13% Pervious Area 14.160 86.87% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 1S: Lowes + ChickfilA Hydrograph ■ Runofi Time (hours) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 73 Summary for Subcatchment 2S: Keglers Runoff = 56.87 cfs @ 11.97 hrs, Volume= 3.005 af, Depth> 7.92" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 3.680 98 Paved parking, HSG B 0.870 61 >75% Grass cover, Good, HSG B 4.550 91 Weighted Average 0.870 19.12% Pervious Area 3.680 80.88% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 2S: Keglers Hydrograph ❑ Runoff 1 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 29 21 22 23 24 Time (hours) POST —Developed — Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 74 Summary for Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Runoff = 78.54 cfs @ 11.98 hrs, Volume= 3.996 af, Depth> 6.45" Routed to Pond 11P : BERKMAR OVERLOOK POND WP0201900050 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 7.430 79 Approved plan. Fully built. 7.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 7.2 Direct Entry, Subcatchment 4S: Berkmar Overlook DA B WP0201900050 Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 75 Summary for Subcatchment SS: West Berkmar Inlets Runoff = 7.41 cfs @ 11.97 hrs, Volume= 0.351 af, Depth> 5.47" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.210 98 Paved parking, HSG B 0.560 61 >75% Grass cover, Good, HSG B 0.770 71 Weighted Average 0.560 72.73% Pervious Area 0.210 27.27% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment SS: West Berkmar Inlets Hydrograph 8- 7.41 cfs - Type II 24-hr 100 year Rainfall=9.02" 6-Runoff Area=0.770 ac 5 1 Runoff Volume=0.351 of Runoff Depth>5.47" 0 4 LL Tc=6.0 min 3 - - - CN=71 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 76 Summary for Subcatchment 6S: POST Berkmar Self Storage WPO202200032 Runoff = 53.40 cfs @ 12.00 hrs, Volume= 3.015 af, Depth> 7.31" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 3.400 98 Paved parking, HSG B 1.550 61 >75% Grass cover, Good, HSG B 4.950 86 Weighted Average 1.550 31.31% Pervious Area 3.400 68.69% Impervious Area Tc Length Capacity Description 9.2 Direct Entry, ❑ Runoff POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 77 Summary for Subcatchment 7S: Ex. Dev. to West Runoff = 106.29 cfs @ 11.99 hrs, Volume= 5.665 af, Depth> 6.94" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Descri 2.890 61 >75% Grass cover, Good, HSG B 1.010 55 Woods, Good, HSG B 5.890 98 Paved parking, HSG B 9.790 83 Weighted Average 3.900 39.84% Pervious Area 5.890 60.16% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 7S: Ex. Dev. to West Hydrograph ■ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 78 Summary for Subcatchment 8S: SPCA AREA F TO SWM A Runoff = 10.52 cfs @ 11.97 hrs, Volume= 0.519 af, Depth> 6.70" Routed to Pond 10P : SPCA SWM A SYSTEM 01 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.510 98 Paved parking, HSG B 0.420 61 >75% Grass cover, Good, HSG B 0.930 81 Weighted Average 0.420 45.16% Pervious Area 0.510 54.84% Impervious Area Tc Length Capacity Description /-fa % 6.0 Direct Entry, Subcatchment 8S: SPCA AREA F TO SWM A Hydrograph ❑ Runoff POST —Developed — Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 79 Summary for Subcatchment 10S: SPCA AREA H TO SWM B Runoff = 5.34 cfs @ 11.97 hrs, Volume= 0.290 af, Depth> 8.29" Routed to Pond 9P : SPCA SWM B SYSTEM 02 (CMP DETENTION) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.370 98 Paved parking, HSG B 0.050 61 >75% Grass cover, Good, HSG B 0.420 94 Weighted Average 0.050 11.90% Pervious Area 0.370 88.10% Impervious Area Tc Length 1 0 Capacity Description Direct Entry, Subcatchment 10S: SPCA AREA H TO SWM B Hydrograph ❑Runoff 5.34 cfs Type 11 24-hr 100 year Rainfall=9.02" Runoff Area=0.420 ac Runoff Volume=0.290 of Runoff Depth>8.29" Tc=6.0 min CN=94 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 80 Summary for Subcatchment 11S: SPCA AREA TO EX BIO Runoff = 3.17 cfs @ 11.98 hrs, Volume= 0.147 af, Depth> 4.11" Routed to Pond 2P : FCC BIO FACILITY Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.250 61 >75% Grass cover, Good, HSG B 0.180 58 Woods/grass comb., Good, HSG B 0.430 60 Weighted Average 0.430 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: SPCA AREA TO EX BIO Hydrograph ❑ Runoff 3_- Type II 24-hr 100 year Rainfall=9.02" Runoff Area=0.430 ac Runoff Volume=0.147 of 2_1 K Runoff Depth>4.11" I I [r� Tc=6.0 min xnlrk 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 81 Summary for Subcatchment 12S: 12S SPCA Area 4 - Upstream Runoff = 79.90 cfs @ 12.00 hrs, Volume= 4.000 af, Depth> 3.86" Routed to Link 10L : WP0201800030 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Descri 0.570 98 Paved parking, HSG B 1.290 61 >75% Grass cover, Good, HSG B 10.570 55 Woods, Good, HSG B 12.430 58 Weighted Average 11.860 95.41 % Pervious Area 0.570 4.59% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 12S: 12S SPCA Area 4 - Upstream Hydrograph ■ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 82 Summary for Subcatchment 13S: SPCA AREA TO EX SWM Runoff = 24.45 cfs @ 11.99 hrs, Volume= 1.290 af, Depth> 6.70" Routed to Pond 3P : SPCA EX SWM Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Descri 1.280 98 Paved parking, HSG B 0.890 61 >75% Grass cover, Good, HSG B 0.140 58 Woods/grass comb., Good, HSG B 2.310 81 Weighted Average 1.030 44.59% Pervious Area 1.280 55.41 % Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 13S: SPCA AREA TO EX SWM Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 83 Summary for Subcatchment US: Open Space around Facility Runoff = 34.11 cfs @ 11.98 hrs, Volume= 1.583 af, Depth> 3.62" Routed to Pond 7P : Modified SWIM Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 1.310 61 >75% Grass cover, Good, HSG B 3.940 55 Woods, Good, HSG B 5.250 56 Weighted Average 5.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, ■ Runoff POST —Developed — Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 84 Summary for Subcatchment 17S: FCDC into Pipe Runoff = 3.61 cfs @ 11.97 hrs, Volume= 0.205 af, Depth> 8.77" Routed to Link 11 L : WP0201900050 Analysis Point Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 0.280 98 Paved parking, HSG B 0.000 61 >75% Grass cover, Good, HSG B 0.000 58 Woods/grass comb., Good, HSG B 0.280 98 Weighted Average 0.280 100.00% Impervious Area Tc Length Capacity Description 6.0 Direct Entry, Subcatchment 17S: FCDC into Pipe Hydrograph ❑ Runoff 3.61 cfs Type II 24-hr 100 year Rainfall=9.02" 3- Runoff Area=0.280 ac Runoff Volume=0.205 of Runoff Depth>8.77' 2 Tc=6.0 min -1 1 U CN=98 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 85 Summary for Subcatchment 18S: Harvest Moon + Upstream Runoff = 39.98 cfs @ 11.99 hrs, Volume= 2.085 af, Depth> 6.82" Routed to Link 12L : Combined Upstream to Facility Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100 year Rainfall=9.02" Area (ac) CN Description 2.062 98 Paved parking, HSG B 1.605 61 >75% Grass cover, Good, HSG B 3.667 82 Weighted Average 1.605 43.77% Pervious Area 2.062 56.23% Impervious Area Tc Length Capacity Description 7.5 Direct Entry, Subcatchment 18S: Harvest Moon + Upstream Hydrograph ■ Runofi Time (hours) POST -Developed - Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 86 Summary for Pond 2P: EX BIO FACILITY [93] Warning: Storage range exceeded by 33.37' [81] Warning: Exceeded Pond 3P by 19.85' @ 12.00 hrs Inflow Area = 2.740 ac, 46.72% Impervious, Inflow Depth > 6.28" for 100 year event Inflow = 29.71 cfs @ 11.99 hrs, Volume= 1.434 of Outflow = 29.04 cfs @ 12.00 hrs, Volume= 1.365 af, Atten= 2%, Lag= 0.6 min Primary = 29.04 cfs @ 12.00 hrs, Volume= 1.365 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 548.37' @ 12.00 hrs Surf.Area= 3,750 sf Storage= 8,940 cf Plug -Flow detention time= 45.4 min calculated for 1.364 of (95% of inflow) Center -of -Mass det. time= 17.9 min ( 822.0 - 804.1 ) Volume Invert Avail.Storage Storage Description #1 509.40' 8,940 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic -feet) (cubic -feet) 509.40 1,800 0.0 0 0 510.00 1,800 25.0 270 270 512.00 1,800 40.0 1,440 1,710 513.00 1,800 100.0 1,800 3,510 514.00 2,655 100.0 2,228 5,738 515.00 3,750 100.0 3,203 8,940 Device Routing Invert Outlet Devices #1 Primary 509.01' 15.0" Round EX 15 CPP L= 115.3' CPP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 509.01' / 506.75' S= 0.0196 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.23 sf #2 Device 1 512.70' 30.0" x 30.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=28.84 cfs @ 12.00 hrs HW=547.86' (Free Discharge) L1=EX 15 CPP (Inlet Controls 28.84 cfs @ 23.50 fps) t2=Riser (Passes 28.84 cfs of 178.45 cfs potential flow) POST Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 87 Pond 2P: EX BIO FACILITY Hydrograph ■ Inflow ® Pnmary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST -Developed - Berkmar Type /I 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 88 Summary for Pond 3P: SPCA EX SWM [921 Warning: Device #3 is above defined storage [931 Warning: Storage range exceeded by 10.82' [881 Warning: Qout>Qin may require smaller dt or Finer Routing [851 Warning: Oscillations may require smaller dt or Finer Routing (severity=15) Inflow Area = 2.310 ac, 55.41 % Impervious, Inflow Depth > 6.70" for 100 year event Inflow = 24.45 cfs @ 11.99 hrs, Volume= 1.290 of Outflow = 26.60 cfs @ 11.99 hrs, Volume= 1.287 af, Atten= 0%, Lag= 0.0 min Primary = 26.60 cfs @ 11.99 hrs, Volume= 1.287 of Routed to Pond 2P : EX BIO FACILITY Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 531.82' @ 11.99 hrs Storage= 0.097 of Plug -Flow detention time= 7.9 min calculated for 1.286 of (100% of inflow) Center -of -Mass det. time= 6.7 min ( 800.4 - 793.8) Volume Invert Avail.Storage Storage Description #1 517.00' 0.097 of 48.0" Round RCP -Round 48" L= 335.0' Device Routing Invert Outlet Devices #1 Primary 517.00' 15.0" Round RCP -Round 15" L= 15.6' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 517.00' / 513.60' S= 0.2179 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.23 sf #2 Device 1 517.00' 9.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 522.00' 15.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=26.58 cfs @ 11.99 hrs HW=531.80' (Free Discharge) L1=RCP_Round 15" (Passes 26.58 cfs of 30.34 cfs potential flow) t2=0rifice/Grate (Orifice Controls 8.08 cfs @ 18.29 fps) 3--Orifice/Grate (Orifice Controls 18.50 cfs @ 15.08 fps) POST Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 89 Pond 3P: SPCA EX SWM Hydrograph ■ Inflow p Pr mary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST -Developed - Berkmar Type II 24-hr 100 year Rainfa&9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 90 Summary for Pond 7P: Modified SWM Facility Inflow Area = 69.507 ac, 46.63% Impervious, Inflow Depth > 6.42" for 100 year event Inflow = 686.11 cfs @ 11.99 hrs, Volume= 37.164 of Outflow = 144.71 cfs @ 12.19 hrs, Volume= 37.148 af, Atten= 79%, Lag= 11.7 min Primary = 144.71 cfs @ 12.19 hrs, Volume= 37.148 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 478.14' @ 12.19 hrs Surf.Area= 71,124 sf Storage= 546,979 cf Plug -Flow detention time= 42.2 min calculated for 37.148 of (100% of inflow) Center -of -Mass det. time= 41.9 min ( 832.1 - 790.2) Volume Invert Avail.Storage Storage Description #1 458.00' 689,722 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 458.00 100 0 0 460.00 1,452 1,552 1,552 462.00 5,111 6,563 8,115 464.00 10,317 15,428 23,543 466.00 15,977 26,294 49,837 468.00 22,633 38,610 88,447 470.00 31,034 53,667 142,114 472.00 39,369 70,403 212,517 474.00 48,481 87,850 300,367 476.00 58,977 107,458 407,825 478.00 70,278 129,255 537,080 480.00 82,364 152,642 689,722 Device Routing Invert Outlet Devices #1 Primary 452.30' 36.0" Round RCP -Round 36" L= 480.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 452.30' / 442.70' S= 0.0200 7' Cc= 0.900 n= 0.013, Flow Area= 7.07 sf #2 Device 1 471.36' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 453.10' 18.0" Round RCP -Round 18" L= 32.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 453.10' / 452.80' S= 0.0094 '/' Cc= 0.900 n= 0.013, Flow Area= 1.77 sf #4 Device 3 458.00' 18.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Device 3 468.00' 48.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #6 Primary 479.50' 50.0' long x 10.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 POST —Developed — Berkmar Type lI 24-hr 100 year Rainfall=9.02" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 91 OutFlow Max=144.71 cfs @ 12.19 hrs HW=478.14' (Free Discharge) P_Round 36" (Barrel Controls 144.71 cfs @ 20.47 fps) Orifice/Grate (Passes < 157.55 cfs potential flow) RCP Round 18" (Passes < 41.93 cfs potential flow) ,4=Orifice/Grate (Passes < 37.47 cfs potential flow) -5=Orifice/Grate (Passes < 192.67 cfs potential flow) )ad -Crested Rectangular Weir ( Controls 0.00 cfs) Pond 7P: Modified SWM Facility Hydrograph ■ Inflow ■ Primary Time (hours) POST -Developed - Berkmar Type /I 24-hr 100 year Rainfa&9.02" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 92 Summary for Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Inflow Area = 0.420 ac, 88.10% Impervious, Inflow Depth > 8.29" for 100 year event Inflow = 5.34 cfs @ 11.97 hrs, Volume= 0.290 of Outflow = 5.20 cfs @ 11.99 hrs, Volume= 0.290 af, Atten= 3%, Lag= 1.1 min Primary = 5.20 cfs @ 11.99 hrs, Volume= 0.290 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 527.93' @ 11.99 hrs Surf.Area= 0.010 ac Storage= 0.072 of Plug -Flow detention time= 40.0 min calculated for 0.290 of (100% of inflow) Center -of -Mass det. time= 39.4 min ( 793.4 - 754.1 ) Volume Invert Avail.Storage Storage Description #1 523.24' 0.074 of 60.0" Round RCP -Round 60" L= 165.0' S= 0.0010 ? Device Routing Invert Outlet Devices #1 Primary 523.24' 15.0" Round RCP -Round 16' L= 9.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 523.24' / 523.04' S= 0.0206 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 523.24' 3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 527.40' 3.7' long Sharp -Crested Rectangular Weir 0 End Contraction(s) Primary OutFlow Max=5.18 cfs @ 11.99 hrs HW=527.93' (Free Discharge) t1=RCP_Round 15" (Passes 5.18 cfs of 16.25 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.51 cfs @ 10.29 fps) 3-Sharp-Crested Rectangular Weir (Weir Controls 4.67 cfs @ 2.38 fps) POST Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here) Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 93 Pond 9P: SPCA SWM B SYSTEM 02 (CMP DETENTION) Hydrograph ❑ Inflow ❑ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST -Developed - Berkmar Type /I 24-hr 100 year Rainfa&9.02" Prepared by {enter yur company name here) Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 94 Summary for Pond 10P: SPCA SWM A SYSTEM 01 (CMP DETENTION) [93] Warning: Storage range exceeded by 0.15' [88] Warning: Qout>Qin may require smaller dt or Finer Routing Inflow Area = 0.930 ac, 54.84% Impervious, Inflow Depth > 6.70" for 100 year event Inflow = 10.52 cfs @ 11.97 hrs, Volume= 0.519 of Outflow = 10.80 cfs @ 11.97 hrs, Volume= 0.519 af, Atten= 0%, Lag= 0.0 min Primary = 10.80 cfs @ 11.97 hrs, Volume= 0.519 of Routed to Link 10L : WP0201800030 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 517.42' @ 11.97 hrs Storage= 0.133 of Plug -Flow detention time= 51.2 min calculated for 0.518 of (100% of inflow) Center -of -Mass det. time= 50.2 min ( 842.4 - 792.2) Volume Invert Avail.Storage Storage Description #1 510.12' 0.133 of 84.0" Round CMP_Round U' L= 150.0' S= 0.0010 '/' Device Routing Invert Outlet Devices #1 Primary 510.12' 15.0" Round RCP -Round 1T' L= 24.7' RCP, rounded edge headwall, Ke= 0.100 Inlet / Outlet Invert= 510.12' / 509.17' S= 0.0385 '/' Cc= 0.900 n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf #2 Device 1 510.12' 3.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 516.56' 3.8' long Sharp -Crested Vee/Trap Weir Cv= 2.62 (C= 3.28) Primary OutFlow Max=10.79 cfs @ 11.97 hrs HW=517.42' (Free Discharge) t1=RCP_Round 15" (Passes 10.79 cfs of 20.13 cfs potential flow) tZ=Orifice/Grate (Orifice Controls 0.86 cfs @ 12.88 fps) 3=Sharp-Crested Vee/Trap Weir (Weir Controls 9.93 cfs @ 3.04 fps) POST Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 95 ❑ Inf.. p Pnmary Time (hours) POST -Developed - Berkmar Type II 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCADO 10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 96 Summary for Pond 11 P: BERKMAR OVERLOOK POND WP0201900050 Inflow Area = 7.430 ac, 0.00% Impervious, Inflow Depth > 6.45" for 100 year event Inflow = 78.54 cfs @ 11.98 hrs, Volume= 3.996 of Outflow = 72.87 cfs @ 12.01 hrs, Volume= 3.989 af, Atten= 7%, Lag= 1.9 min Primary = 72.87 cfs @ 12.01 hrs, Volume= 3.989 of Routed to Link 11 L : WP0201900050 Analysis Point Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 525.86' @ 12.01 hrs Surf.Area= 7,347 sf Storage= 23,477 cf Plug -Flow detention time= 20.2 min calculated for 3.987 of (100% of inflow) Center -of -Mass det. time= 19.0 min ( 816.7 - 797.7 ) Volume Invert Avail.Storage Storage Description #1 518.00' 24,528 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 518.00 37 0 0 520.00 964 1,001 1,001 522.00 2,647 3,611 4,612 524.00 4,867 7,514 12,126 526.00 7,535 12,402 24,528 Device Routing Invert Outlet Devices #1 Primary 518.00' 18.0" Round RCP -Round 18" L= 119.0' RCP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 518.00' / 514.00' S= 0.0336 '/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf #2 Device 1 518.00' 6.0" Vert. Low -Flow Orifice C= 0.500 Limited to weir flow at low heads #3 Device 1 522.00' 9.0" Vert. Mid -Flow Orifice C= 0.500 Limited to weir flow at low heads #4 Device 1 523.00' 12.6' long Riser 2 End Contraction(s) #5 Primary 524.50' 12.0' long x 25.0' breadth Emergency Spillway Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=72.75 cfs @ 12.01 hrs HW=525.86' (Free Discharge) 1=RCP_Round 18" (Inlet Controls 22.68 cfs @ 12.84 fps) Low -Flow Orifice (Passes < 2.17 cfs potential flow) q-Riser Mid-Flow Orifice (Passes< 3.31 cfs potential flow) (Passes < 189.92 cfs potential flow) S=Emergency Spillway (Weir Controls 50.06 cfs @ 3.08 fps) POST Developed_Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter your company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 97 Pond 11P: BERKMAR OVERLOOK POND WPO201900050 Hydrograph ■ Inflow ■ Primary 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfa11=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 @ 2021 HydroCAD Software Solutions LLC Page 98 Summary for Link 10L: WPO201800030 Analysis Point Inflow Area = 26.310 ac, 32.76% Impervious, Inflow Depth > 5.40" for 100 year event Inflow = 229.35 cfs @ 12.00 hrs, Volume= 11.838 of Primary = 229.35 cfs @ 12.00 hrs, Volume= 11.838 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 10L: WPO201800030 Analysis Point Hydrograph ® Inflow Q Primary TRIG (houm) POST —Developed — Berkmar Type II 24-hr 100 year Rainfall=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 99 Summary for Link 11 L: WPO201900050 Analysis Point Inflow Area = 8.480 ac, 5.78% Impervious, Inflow Depth > 6.43" for 100 year event Inflow = 82.37 cfs @ 12.01 hrs, Volume= 4.545 of Primary = 82.37 cfs @ 12.01 hrs, Volume= 4.545 af, Atten= 0%, Lag= 0.0 min Routed to Link 12L : Combined Upstream to Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 11 L: WPO201900050 Analysis Point Hydrograph ■ Inflow ■ Primary Time (hous) POST —Developed — Berkmar Type 11 24-hr 100 year Rainfall=9.02" Prepared by {enter yur company name here} Printed 2/7/2023 HydroCAD®10.10-7a s/n 08663 © 2021 HydroCAD Software Solutions LLC Page 100 Summary for Link 12L: Combined Upstream to Facility Inflow Area = 64.257 ac, 50.44% Impervious, Inflow Depth > 6.64" for 100 year event Inflow = 652.62 cfs @ 11.99 hrs, Volume= 35.581 of Primary = 652.62 cfs @ 11.99 hrs, Volume= 35.581 af, Atten= 0%, Lag= 0.0 min Routed to Pond 7P : Modified SWIM Facility Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Link 12L: Combined Upstream to Facility Hydrograph ■ Inflow ■ Primary Tlna (houm) Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Monday, Feb 6 2023 Grass Ditch on Future Parcel (Sized for Grass Cover) Triangular Highlighted Side Slopes (z:1) = 2.00, 4.00 Depth (ft) = 0.37 Total Depth (ft) = 1.00 Q (cfs) = 1.600 Area (sqft) = 0.41 Invert Elev (ft) = 501.00 Velocity (ft/s) = 3.90 Slope (%) = 6.67 Wetted Perim (ft) = 2.35 N-Value = 0.030 Crit Depth, Yc (ft) = 0.45 Top Width (ft) = 2.22 Calculations EGL (ft) = 0.61 Compute by: Known Q Known Q (cfs) = 1.60 Elev (ft) 503.00 v 502.50 502.00 501.50 501.00 500.50 1 2 3 Section 4 Reach (ft) 5 6 7 Depth (ft) 2.00 1.50 1.00 0.50 IMI -0.50 8 Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Proposed Downstream Channel Trapezoidal Bottom Width (ft) = 2.00 Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 2.00 Invert Elev (ft) = 460.00 Slope (%) = 6.55 N-Value = 0.035 Calculations Compute by: Known Q Known Q (cfs) = 60.00 Elev (ft) Section 463.00 462.50 462.00 461.50 461.00 460.50 460.00 459.50 Highlighted Depth (ft) Q (cfs) Area(sgft) Velocity (ft/s) Wetted Perim (ft) Crit Depth, Yc (ft) Top Width (ft) EGL (ft) Monday, Feb 6 2023 = 1.37 = 60.00 = 6.49 = 9.24 = 8.13 = 1.81 = 7.48 = 2.70 Depth (ft) 3.00 2.50 2.00 1.50 1.00 0.50 I I I I I I I I I I I 1 1 -0.50 0 1 2 3 4 5 6 7 8 9 10 11 12 Reach (ft) ECOSYSTEM SERVICES, LLC 1102 Carlton Avenue Charlottesville, VA 22902 540.578.4296 www.ecoVstemservices.us jongecoVstemservices.us February 7, 2023 Riki van Niekirk Project Engineer TIMMONS GROUP 608 Preston Avenue, Suite 300 Charlottesville, VA 22903 RE: Nutrient Offset Credit — Credit Availability Letter Project: Berkmar Self Storage and Hotel Project TMP: 04500-00-00112EO and 04500-00-0011200 Project Address: Berkmar Drive, Charlottesville, VA 22903 Project HUC: 02080204 Bank HUC: 02080204 Bank Address: 1705 Lambs Road, Charlottesville, VA 22901 Dear Riki, We appreciate the opportunity to provide a credit availability letter for 5.19 pounds of phosphorus for the above referenced project. This letter is to certify that as the date of this letter, Ivy Creek Nutrient Bank has 161.34 pounds of phosphorus (TP), 248.28 pounds of nitrogen (TN), and 50,875.5 pounds of TSS available for transfer to those entities requiring offsets in accordance with the Chesapeake Bay Watershed Nutrient Credit Exchange Program (VA Code § 62.1-44.19:14 et seq.). Those offsets are also transferable in accordance with the Virginia stormwater offset program (VA Code § 62.1-44.15:35) and the Virginia Soil and Water Conservation Board's Guidance Document on Stormwater Nonpoint Nutrient Offsets approved on July 23, 2009, to those regulated entities qualifying for nutrient credits. We can certainly accommodate your needs and could offer to fulfil the order of 5.19 pounds of phosphorus. Please feel free to contact us with any questions. I hope we have the opportunity to work together on this project. Sincerely, Ecosystem Services, LLC By: * ( bL Jonathan R. Roller, AOSE PSS CNMP Manager —Authorized Representative