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HomeMy WebLinkAboutWPO202100059 Calculations 2022-04-15Crozet Self Storage ALBEMARLE COUNTY, VIRGINIA WPO PLAN DESIGN CALCULATIONS & NARRATIVE OCTOBER 25, 2021 REVISED: FEBRUARY 2, 2022 REVISED: APRIL 15, 2022 % TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Clint Shifflett, PE Timmons Group 608 Preston Avenue, Suite 200 Charlottesville, VA 22903 434.327.1690 jXLTI1 CLINT W. SI�I,FFLET Lic. N 54330 04/15/2022 Table of Contents Section Title 1. Project Narrative 2. LD-204 Inlet Calculations 3. LD-229 Pipe Calculations 4. LD-347 Hydraulic Grade Line Analysis 5. Virginia Runoff Reduction Method Worksheet Summary 6. Dry Pond Routing Calculations 7. Cut/Fill Volume Estimate Project Narrative: This project includes the demolition of two houses and a gas station and the construction of a self -storage facility and associated utilities and landscaping. The limits of disturbance is 1.84 acres. Water Quality: The current site is a gas station and two houses. 1.84 acres was analyzed for water quality. The total TP load reduction required is 1.40 lbs/year. The 1.40 lbs/yr of required nutrient credits area shall be purchased from a DEQ-Approved Nutrient Credit Bank in Accordance with VA code 62.1-44.15:35. Water Quantity The site generally drains towards the south and southwest of the property. A dry pond facility, SWM A, is proposed to detain and release runoff such that the resulting runoff from the site at two analysis points meets the 1-year 24-hour storm requirements of the energy balance equation. Additionally, the 10-year 24-hour storm is being detained to reduce the pre -developed 10-year 24-hour storm to meet flood protection requirements, in accordance with 9VAC25-670-66, Section C.3.c. See sheet C6.1 for the Stormwater Management Plan. FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 1 OF 2 ROUTE PROJECT Crozet Self Storage DESIGNER: KAM CHECKED: DATE 4/12/2022 UNITS:NGLISH INLET O P a N a OF au Za 6 O O w E rG S Z U 66 t2 O� ay. U U '�" �� V V 1�i, WW� 'f�-' QQ� '~µ-' " a r4n 3.. k 3 ON t+. h a $ U OV (J z �w'2V h V ..i [zii a a ¢4 W va a� V ZZ u�'. V ai Se Inlets Only fA Z w a F O Z a 3 a 6 eon 8 9 �A n� F �a 100 DI-1 2.000 0.050 0.90 0.045 Back/Lt. 0.0001RIG 0.150 0.25 0.0375 Back/Lt. 0.083 4 0.332 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.332 0.001 2.000 2 0.332 1.330 Weir Flow 202 DI-3C 8.000 0. 120 0.90 0.108 Back/Lt. 0.0001RIGH 0.180 0.25 0.045 Back/Lt. 0.153 4 0.612 0 0.0200 0.0200 2.460 2.000 0.813 0.0833 4.165 3.52 Back/Lt. 0 4 0 0 Ahead/Rt. 0.612 0.0200 8 0.612 0.968 0.160 0.333 0.48048 2.968 4.032 Weir Flow 204 DI-1 2.000 0.040 0.90 0.036 Back/Lt. 0.0001RIGH 0.460 0.25 0.115 Back/Lt. 0.151 4 0.604 0 0.0100 0.0208 3.495 2.000 0.5722 0.0833 4.0048 3.50 Back/Lt. 0 4 0 0 Ahead/Rt. 0.604 0.0100 2.000 2 0.604 2.238 0.166 6.237 8.965 T> 8.0 ft 206 DI-311 4.000 0.160 0.90 0.144 Back/Lt. 0.0001RIG 0.260 0.25 0.065 Back/Lt. 0.209 4 0.836 0 0.0100 0.0360 3.550 2.000 0.5634 0.0833 2.3139 3.14 Back/Lt. 0 4 0 0 Ahead/Rt. 0.836 0.0100 4 0.836 1.579 0.288 0.333 0.86486 3.579 3.656 Weir Flow 208 DI-1 2.000 0.130 0.90 0.117 Back/Lt. 0.0001RIG 0.070 0.25 0.0175 Back/Lt. 0.135 4 0.54 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.540 0.001 2.000 2 0.540 1.839 T> 8.0 ft 210 DI-1 2.000 0.120 0.90 0.108 Back/Lt. 0.0001RIG 0.300 0.25 0.075 Back/Lt. 0.183 4 0.732 0 Back/Lt. 0 4 0 0 Ahead/Rt. 0.732 0.001 2.000 2 0.732 2.252 Weir Flow 302 DI-3C 6.000 0.090 0.90 0.081 Back/Lt. 0.0001RIGHT 0.081 4 0.324 0 0.0200 0.0200 L664 2.000 1.2019 0.0833 4.165 3.52 Back/Lt. 0 4 0 0 Ahead/Rt. 0.324 0.0200 6 0.324 0.718 0.160 0.333 0.48048 2.718 2.993 Weir Flow 402 DI-1 2.000 0.020 0.90 0.018 Back/Lt. 0.0001RIG 0.120 0.25 0.03 Back/Lt. 0.048 4 0.192 0 Back/Lt. INLETSOFT BY ENSOFTEC DATE: 4/12/2022 FORM LID 204 STORMWATER INLET COMPUTATIONS SHEET 2 OF 2 ROUTE PROJECT Crozet Self Storage DESIGNER: KAM CHECKED: DATE 4/12/2022 UNITS:NGLISH INLET a a 3 w w z a Qvaw Se Inlets Only c o m F.. Z ❑ y W. a F z a .� ram- a au ¢ w E or 8 �2 ❑ F a Z LL ti a Z z 0(7 Z g z'i' V c o L Z w W V A O S 0 4 0 0 Ahead/Rt. 0.192 0.0100 2.000 2 0.192 0.923 T> 8.0 ft EX 400 DI-1 2.000 0.380 0.90 0.342 Back/Lt. 0.0001RIGB 0.440 0.25 0.11 Back/Lt. 0.090 0.20 0.018 Back/Lt. 0.47 4 1.88 0 Back/Lt, 0 4 0 0 Ahead/Rt. 1.880 0.001 2.000 2 L880 2.661 T>8.0ft INLETSOFT BY ENSOFTEC DATE: 4/12/2022 48757-STRM 200 STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 10 PROJECT: LOCATION: COUNTY: Crozet Self Storage Albemarle Designed by: Checked by: UNITS ENGLISH PIPE NO FROM POINT TO POINT DRAIN. AREA "A" Acre (3) RUNOFF COEFF. "C" (4) CA TOTAL INLET TIME Minutes (7) RAIN FALL In/Hr (8) RUNOFF Q CFS (9) INVERT ELEVATIONS LENGTH of Pipe Ft. (12) SLOPE FOR. (13) SIZE (Dia. Or Span/Rise) In. (14) SHAPE Capacity CFS (15) Friction Slope Ft./Ft. VEL Vn Ft/Sec (16) FLOW TIME Min. (17) REMARKS (18) INCRE- MENT (5) ACCUM- ULATED (6) ADDTL CA UPPER END (10) LOWER END (11) REFERENCE (1) STA. REFERENCE (2) STA. 209 210 208 0.760 0.640 0.486 0.486 0.000 0.000 8.901 4.329 672.394 670.890 30.078 0.050 15.000 Circular 15.644 0.004 10.923 0.046 207 208 206 0.200 0.670 0.134 0.620 0.000 0.046 8.870 5.503 670.791 668.631 54.002 0.040 1 15.000 Circular 13.992 1 0.006 1 10.7431 0.084 205 206 204 0.420 0.500 0.210 0.830 1 0.000 0.130 8.814 7.319 668.530 1 667.896 63.434 0.010 15.000 Circular 6.996 0.011 6.489 0.163 203 204 202 0.500 0.310 0.155 0.985 0.000 6.000 6.230 6.139 667.800 667.089 71.091 0.010 15.000 Circular 6.996 0.008 6.446 0.184 201 202 200 0.300 0.510 0.153 1.138 0.000 6.184 6.176 7.031 666.309 666.000 15.431 0.020 21.000 Circular 24.272 0.002 8.755 0.029 48757-STRM 300 STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 10 PROJECT: LOCATION: COUNTY: Crozet Self Storage Albemarle Designed by: Checked by: UNITS ENGLISH PIPE NO FROM POINT TO POINT DRAIN. AREA "A" Acre (3) RUNOFF COEFF. "C" (4) CA TOTAL INLET TIME Minutes (7) RAIN FALL Inft (8) RUNOFF Q CFS (9) INVERT ELEVATIONS LENGTH of Pipe Ft. (12) SLOPE FOR. (13) SIZE (Dia. Or Span/Rise) In. (14) SHAPE Capacity CFS (15) Friction Slope Ft./Ft. VEL Vn Ft/Sec (16) FLOW TIME Min. (17) REMARKS (18) INCRE- MENT (5) ACCUM- ULATED (6) ADDTL CA UPPER END (10) LOWER END (11) REFERENCE (1) STA. REFERENCE (2) STA. 301 302 300 0.430 0.900 0.387 0.387 0.000 6.000 6.230 2.411 666.491 666.000 24.554 0.020 15.000 Circular 9.894 0.000 6.669 0.061 48757-STRM 400 STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY PROJECT: LOCATION: COUNTY: Designed by: Checked by: UNITS ENGLISH PIPE NO FROM POINT TO POINT DRAIN. AREA "A" Acre (3) RUNOFF COEFF. "C" (4) CA TOTAL INLET TIME Minutes (7) RAIN FALL In/Hr (8) RUNOFF Q CFS (9) INVERT ELEVATIONS LENGTH of Pipe Ft. (12) SLOPE FOR. (13) SIZE (Dia. Or Span/Rise) In. (14) SHAPE Capacity CFS (15) Friction Slope Ft./Ft. VEL Vn Ft/Sec (16) FLOW TIME Min. (17) REMARKS (18) INCRE- MENT (5) ACCUM- ULATED (6) ADDTL CA UPPER END (10) LOWER END (11) REFERENCE (1) STA. REFERENCE (2) STA. 401 402 EX.400 0.140 0.340 0.048 0.048 0.000 0.000 5.000 0.238 665.866 663.700 108.293 0.020 15.000 Circular 9.894 0.000 3.382 0.534 48757-STRM 200 PROJECT: Crozet Self Storage DESIGNED BY: HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY 10 Year Checked: INLET OR JUNCTION INLET STATION OUTLET WATER SURFACE ELEV. DIA. PIPE Do (In) DESIGN DISCH. Do (CFS) LENGTH PIPE Lo (Ft) FRICTION SLOPE, Sfo (FT/FT) FRICTION LOSS Hf (Ft) JUNCTION LOSS FINAL H (Ft) Inlet Water Surface Elevation Rim Elev Comments Vo Ho (Ft) Qi Vi DIM Vi'2/2g Hi Angle HD Ht 1.3 Ht 0.5 Ht 202 667.4 21 7.03 15.43 0.17% 0.03 8.75 0.3 6.14 6.45 39.57 0.65 0.23 29.8 0.23 0.75 0 TRUE 0.4 667.8 673.19 OK -5.39 204 668.09 15 6.14 71.09 0.77% 0.55 6.45 0.16 7.32 6.49 47.49 0.65 0.23 70.94 0.4 0.79 0 TRUE 0.94 669.03 673.97 OK -4.94 206 669.03 15 7.32 63.43 1.09% 0.69 6.49 0.16 5.5 10.74 59.12 1.79 0.63 8.39 0.23 1.02 1.33 TRUE 1.36 670.39 672.83 OK -2.44 208 670.39 15 5.5 54 0.62% 0.33 10.74 1 0.45 4.33 10.92 47.29 1.85 0.65 25.43 0.56 1.65 2.15 FALSE 2.48 1 672.87 676.21 OK -3.34 210 672.87 15 4.33 30.08 0.38% 1 0.12 10.92 0.46 0 0 0 0 0 0 0 0.46 0.6 FALSE 0.72 673.59 677.18 OK -3.59 48757-STRM 300 PROJECT: Crozet Self Storage DESIGNED BY: HYDRAULIC GRADE LINE ANALYSIS INCIDENCE PROBABILITY 10 Year Checked: INLET INLET OUTLET WATER DIA. PIPE DESIGN DISCH. LENGTH PIPE FRICTION SLOPE, Sfo FRICTION LOSS JUNCTION LOSS FINAL Inlet Water Rim Comments 1.3 0.5 OR STATION SURFACE Do Qo Lo [if Vo Ho Qi Vi QiVi Vi'2/2g Hi Angle HD Ht Ht Ht H Surface Elev JUNCTION ELEV. (In) (CFS) (Ft) (FT/FT) (Ft) (Ft) (Ft) Elevation 302 669.32 15 2.41 24.55 0.12% 0.03 6.67 1 0.17 0 0 0 0 0 0 0 0.17 1 0.22 1 FALSE 0.25 669.57 672.99 OK -3.41 48757-STRM 400 PROJECT: DESIGNED BY: HYDRAULIC GRADE LINE ANALYSIS Checked: INCIDENCE PROBABILITY 2 Year INLET INLET OUTLET WATER DIA. PIPE DESIGN DISCH. LENGTH PIPE FRICTION SLOPE, Sfo FRICTION LOSS JUNCTION LOSS FINAL Inlet Water Rim Comments 1.3 0.5 OR STATION SURFACE Do Do Lo [if Vo Ho Qi Vi QIVI Vi'2/2g Hi Angle HD Ht Ht Ht H Surface Elev JUNCTION ELEV. (In) (CFS) (Ft) (FT/FT) (Ft) (Ft) (Ft) Elevation 402 664.7 15 0.24 108.29 0.00% 0 3.38 1 0.04 0 0 0 0 0 0 0 0.04 1 0.06 1 FALSE 0.06 664.76 672.58 OK -7.82 Virginia Runoff Reduction Methotl Mrl sheet DEQ Virginia Runoff Reduction Method Re -Development Compliance Spreadsheet - Version 3.0 BMP Design Specifications list: 2013 Draft Stds & Specs Site Summary Project Title: Crozet Self Storage Date: 44662 Total Rainfall (in): 43 Total Disturbed Acreage: 1.84 Site Land Cover Summary Pre-ReDevelopment Land Cover (acres) Asoils BSolls CSOIIS DSolis Totals %of Total Forest/Open (acres) 0.00 0.16 0.00 0.00 0.16 9 Managed Turf (acres) 0.00 1.24 0.00 0.00 1.24 67 Impervious Cover (acres) 0.00 0.44 0.00 0.00 0.44 24 1.84 100 Post-ReDevelopment Land Cover (acres) Asoils BSolls CSolls DSoils Totals %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf (acres) 0.00 0.75 0.00 0.00 0.75 41 Impervious Cover (acres) 0.00 1.09 0.00 0.00 1.09 59 1.84 100 Site Tv and Land Cover Nutrient Loads Final Port -Development post- Post Adjusted Pre- (Post-ReDevelopment ReDevelopment Development ReDevelopment m rvlous B New l pe ) (New Impervious) Site Rv 0.64 0.48 0.95 0.48 Treatment Volume (W) 4,303 2,062 2,242 2,062 TP Load (lb/yr) 2.70 1.30 1.41 1.30 Total TP Load Reduction Required (Ib/yr) 1.40 0.26 1.14 Final Post -Development Load (Post-ReDevelopment & New Impervious) Pre- ReDevelopment TN Load (Ib/yr) 19.34 10.94 Pre ReDevelopment Final Post -Development Port-ReDevelopment TP TP Load per acre TP Load per acre Load per acre (lb/acre/yr) (lb/acre/yr) (lb/acre/yr) 1.09 1.47 1.09 Summary Print Virginia Runoff Reduction Method Worhsheet Site Compliance Summary Maximum% Reduction Required Below 2�Y pre-ReDevelopment Load Total Runoff Volume Reduction (ff) 0 Total TP Load Reduction Achieved (lb/yr) 0.00 Total TN Load Reduction Achieved (Ib/yr) 0.00 Remaining Post Development TP Load 2.70 (lb/yr) Remaining TP Load Reduction (lb/yr) Required 1.40 Summary Print Virginia Runoff Retluction Method Workeneet Drainage Area Summary D.A. A D.A. B DA. C D.A. D D.A. E Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0.00 Managed Turf (acres) 0.00 0.00 0.00 0.00 0.00 0.00 Impervious Cmer(acres) 0.00 0.00 0.00 0.00 0.00 0.00 Total Area (acres) 0.00 0.00 0.00 0.00 0.00 0.00 Drainage Area Compliance Summary DA. A D.A. B DA. C D.A. D DA. E Total TP Load Reduced (16/yr) 0.00 0.00 0.00 0.00 0.00 0.00 TN Load Reduced (Ih/yr) 0.00 0.00 0.00 0.00 0.00 0.00 Summary Print Virginia Runoff Reduction Method VV-rloi ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Runoff Volume and CN Calculations 1-yearstorm 2-yearrtorm 10-yearstorm Target Rainfall Event (in( 1 0.00 0.00 0.00 Drainage Areas RV & CN Drainage Area A Drainage Area B Drainage Area C Drainage Area D Drainage Area E CN 0 0 0 0 0 RR(W) 0 0 0 0 0 1-year return period RV w-RR(ws-in) 0.00 0.00 0.00 0.00 0.00 RV w RR(wz-in) 0.00 0.00 0.00 0.00 OM CN adjehA 0 0 0 0 0 2-year return period RVw- FIR (.-in) 0.00 0.00 0.00 0.00 0.00 RV w RR (wnin) 0.00 0.00 0.00 0.00 0.00 CN adjusted 0 0 0 0 0 10-year return period RVw-RR(.-in) 0.00 0.00 0.00 0.00 0.00 RV w RR (wsin) 0.00 0.00 0.00 0.00 0.00 CN adjehA 0 0 0 0 0 Summary Print 1S PRE-1-ON 3L ZS PRE-1 COMBINED PRE-1-OFF S4 Reach X 4on Llflk 11S POST-1-ON 12S / POST-1 COMBINED POST-1-OFF C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 1.060 69 50-75% Grass cover, Fair, HSG B (1S, 2S, 11S, 12S) 0.670 98 Paved parking, HSG B (2S, 11S, 12S) 0.120 98 Paved parking, HSG C (1 S) 0.170 65 Woods/grass comb., Fair, HSG B (1S, 2S, 12S) 2.020 80 TOTAL AREA Printed 4/11/2022 C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Area Soil (acres) Group 0.000 HSG A 1.900 HSG B 0.120 HSG C 0.000 HSG D 0.000 Other 2.020 Soil Listing (all nodes) Subcatchment Numbers 1S, 2S, 11S, 12S 1S TOTAL AREA Printed 4/11/2022 C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group HSG-A (acres) HSG-B (acres) HSG-C (acres) 0.000 1.060 0.000 0.000 0.670 0.120 0.000 0.170 0.000 0.000 1.900 0.120 Printed 4/11/2022 Panes d Ground Covers (all nodes) HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) Cover Numbers 0.000 0.000 1.060 50-75% Grass cover, Fair 1 S, 2S, 11S, 12S 0.000 0.000 0.790 Paved parking 1 S, 2S, 11S, 12S 0.000 0.000 0.170 Woods/grass comb., Fair 1 S, 2S, 12S 0.000 0.000 2.020 TOTAL AREA CrozetSelfStorage_AnalysisPoint1 Type // 24-hr 1-year Rainfall=3.07" Prepared by Timmons Group Printed 4/11/2022 HydroCAD® 10.10-4a s/n 08663 © 2020 HydroCAD Software Solutions LLC Paoe 5 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS:PRE-1-ON Runoff Area=0.330ac 36.36%Impervious Runoff Depth>1.13" Flow Length=380' Tc=14.9 min CN=79 Runoff=0.52 cfs 0.031 of Subcatchment2S: PRE -I -OFF Runoff Area=0.660 ac 43.94% Impervious Runoff Depth>1.25" Flow Length=531' Tc=14.0 min CN=81 Runoff=1.19 cfs 0.069 of Subcatchment11S: POST -I -ON Runoff Area=0.370 ac 24.32% Impervious Runoff Depth>0.96" Tc=6.0 min CN=76 Runoff=0.68 cfs 0.030 of Subcatchmentl2S: POST -I -OFF Runoff Area=0.660 ac 43.94% Impervious Runoff Depth>1.25" Flow Length=531' Tc=14.0 min CN=81 Runoff=1.19 cfs 0.069 of Link 3L: PRE-1 COMBINED Inflow=1.71 cfs 0.100 of Primary=1.71 cfs 0.100 of Link 13L: POSTA COMBINED Inflow=1.69 cfs 0.098 of Primary=1.69 cfs 0.098 of Total Runoff Area = 2.020 ac Runoff Volume = 0.198 of Average Runoff Depth = 1.18" 60.89% Pervious = 1.230 ac 39.11% Impervious = 0.790 ac C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 1S: PRE-1-ON Runoff = 0.52 cfs @ 12.08 hrs, Volume= 0.031 af, Depth> 1.13" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.120 98 Paved parking, HSG C 0.200 69 50-75% Grass cover, Fair, HSG B 0.010 65 Woods/grass comb., Fair, HSG B 0.330 79 Weighted Average 0.210 63.64% Pervious Area 0.120 36.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.3 19 0.0200 1.06 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.71" 10.1 81 0.0100 0.13 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.6 24 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.0 12 0.5946 5.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.9 244 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 14.9 380 Total CrozetSelfStorage_Analys is Poi nt1 Preaared by Timmons Grow Type 1124-hr 1-year Rainfall=3.07" Subcatchment IS: PRE-7-ON Printed 4/11/2022 - - -- I ---I -- I---0.52 CfS----- I------- li ---li---li----It---- ■Runoff 0.5 li li li 0.45 i I I I 0.4 I 0.35 � I 0.3 -------------- LL 0.25 ---L---L----L 0.2 li li li 0.15 0.1 0.05 JTYpe 11,-24yhr 1=y-3ar kainfaICT3Q7w Rtjffdff Are&OF 33OF ac I I I I `Rut�ofi;�/-ol',um�=0:b31`a1'` -- Run0 De`pth-�1:1313"- I - --- ----F1oWLetvgth--38or- --, --- Tc=1479 rain I I -----I-------tN=�79- I I I I 1 12 13 Time (hours) C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 2S: PREA-OFF Runoff = 1.19 cfs @ 12.06 hrs, Volume= 0.069 af, Depth> 1.25" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.290 98 Paved parking, HSG B 0.290 69 50-75% Grass cover, Fair, HSG B 0.080 65 Woods/grass comb., Fair, HSG B 0.660 81 Weighted Average 0.370 56.06% Pervious Area 0.290 43.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.1 100 0.0270 0.21 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.5 36 0.0270 1.15 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.6 34 0.0200 0.99 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.9 105 0.0100 2.03 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.0 12 0.5946 5.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.9 244 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 14.0 531 Total CrozetSelfStorage_Analys is Poi nt1 Prepared by Timmons GrouD Type 1124-hr 1-year Rainfall=3.07" Subcatchment 2S: PRE-1-OFF Printed 4/11/2022 I I I 1.19 cfs Type Il 24yhr ---'E year R-ait�#aNr�:QT" Runbff Areai=0.660 i3c ' RuOoff', Volume=0.',069', of Runoff DepthP-1.25" Flow Lehgth=531' Tc=1410 rain dN='81 1 12 13 Time (hours) ❑ Runoff CrozetSelfStorage_Analys is Poi nt1 Preaared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 11S: POST -I -ON Runoff = 0.68 cfs @ 11.98 hrs, Volume= 0.030 af, Depth> 0.96" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.090 98 Paved parking, HSG B 0.280 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.370 76 Weighted Average 0.280 75.68% Pervious Area 0.090 24.32% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ff) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: POST-1-ON 0.75 ------------------------------ I I I I I I __ 0.68 07 ----i- 0.85 0.8 I I I I I I 0.55 0.5 I I I I I I 0.45 _ ._. 0.4 I I I I I I 0.35 0.3 i I I I I I I 0.25 I I I I I I ____________________________ 0.2 I I I I I I I I I I I 0.15 0.1 ----------------- I I I I I I I I -- --- Type1111-2a-;hr 1-year_Rai nfall_T3.07" -R-u ftff 4rea.370 =- - ,Ru r�off ;NolpM=6: b30raf -- -- ,-Runof�De tfi=446" - -r---,- ------ ---I-- Tt7-"xriln- I I I I I I I I I I I I --- --------*--- - ---*--- I W 6- I I I I I I I I I I I I I I I 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Time (hove) ■ Runoff C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 12S: POSTA-OFF Runoff = 1.19 cfs @ 12.06 hrs, Volume= 0.069 af, Depth> 1.25" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.290 98 Paved parking, HSG B 0.290 69 50-75% Grass cover, Fair, HSG B 0.080 65 Woods/grass comb., Fair, HSG B 0.660 81 Weighted Average 0.370 56.06% Pervious Area 0.290 43.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.1 100 0.0270 0.21 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.5 36 0.0270 1.15 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.6 34 0.0200 0.99 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.9 105 0.0100 2.03 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.0 12 0.5946 5.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.9 244 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 14.0 531 Total CrozetSelfStorage_Analys is Poi nt1 Prepared by Timmons GrouD Type 1124-hr 1-year Rainfall=3.07" Printed 4/11/2022 Subcatchment 12S: POST-1-OFF ❑ Runoff 1.19 cfs Type Il 24yhr ---'E year R-ait�#aNr�:QT" Runbff Areai=0.660 i3c ' RuOoff', Volume=0.',069', of Runoff DepthP-1.25" Flow Lehgth=531' Tc=1410 rain dN='81 Time (hours) C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Printed 4/11/2022 Summary for Link 3L: PRE-1 COMBINED Inflow Area = 0.990 ac, 41.41 % Impervious, Inflow Depth > 1.21" for 1-year event Inflow = 1.71 cfs @ 12.07 hrs, Volume= 0.100 of Primary = 1.71 cfs @ 12.07 hrs, Volume= 0.100 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 3L: PRE-1 COMBINED ■ Inflow ■ Primary 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Printed 4/11/2022 Summary for Link 13L: POST-1 COMBINED Inflow Area = 1.030 ac, 36.89% Impervious, Inflow Depth > 1.15" for 1-year event Inflow = 1.69 cfs @ 12.02 hrs, Volume= 0.098 of Primary = 1.69 cfs @ 12.02 hrs, Volume= 0.098 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 13L: POST-1 COMBINED ■ Inflow ■ Primary 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) CrozetSelfStorage_AnalysisPoint1 Type // 24-hr 10-year Rainfall=5.58" Prepared by Timmons Group Printed 4/11/2022 HydroCAD® 10.10-4a s/n 08663 © 2020 HydroCAD Software Solutions LLC Paae 15 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS:PRE-1-ON Runoff Area=0.330ac 36.36%Impervious Runoff Depth>3.06" Flow Length=380' Tc=14.9 min CN=79 Runoff=1.40 cfs 0.084 of Subcatchment2S: PRE -I -OFF Runoff Area=0.660 ac 43.94% Impervious Runoff Depth>3.25" Flow Length=531' Tc=14.0 min CN=81 Runoff=3.05 cfs 0.179 of Subcatchment11S: POST -I -ON Runoff Area=0.370 ac 24.32% Impervious Runoff Depth>2.79" Tc=6.0 min CN=76 Runoff=1.92 cfs 0.086 of Subcatchmentl2S: POST -I -OFF Runoff Area=0.660 ac 43.94% Impervious Runoff Depth>3.25" Flow Length=531' Tc=14.0 min CN=81 Runoff=3.05 cfs 0.179 of Link 3L: PRE-1 COMBINED Inflow=4.45 cfs 0.263 of Primary=4.45 cfs 0.263 of Link 13L: POSTA COMBINED Inflow=4.53 cfs 0.265 of Primary=4.53 cfs 0.265 of Total Runoff Area = 2.020 ac Runoff Volume = 0.528 of Average Runoff Depth = 3.13" 60.89% Pervious = 1.230 ac 39.11% Impervious = 0.790 ac C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 1S: PRE-1-ON Runoff = 1.40 cfs @ 12.07 hrs, Volume= 0.084 af, Depth> 3.06" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.120 98 Paved parking, HSG C 0.200 69 50-75% Grass cover, Fair, HSG B 0.010 65 Woods/grass comb., Fair, HSG B 0.330 79 Weighted Average 0.210 63.64% Pervious Area 0.120 36.36% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.3 19 0.0200 1.06 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.71" 10.1 81 0.0100 0.13 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.6 24 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.0 12 0.5946 5.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.9 244 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 14.9 380 Total CrozetSelfStorage_Analys is Poi nt1 Preaared by Timmons Grow N 0 LL Type 11 24-hr 10-year Rainfall=5.58" Subcatchment IS: PRE-7-ON Printed 4/11/2022 I I I I Type Il 24-hr 1b-year Rainfall r5.98" --:--- RunbffArea1=0.330-Ac RuOoVol'umQ=0.084'of Runoff Depth�3.Q6"ff Flow Lehgth=380' Tc=14:9 rain Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 2S: PREA-OFF Runoff = 3.05 cfs @ 12.06 hrs, Volume= 0.179 af, Depth> 3.25" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.290 98 Paved parking, HSG B 0.290 69 50-75% Grass cover, Fair, HSG B 0.080 65 Woods/grass comb., Fair, HSG B 0.660 81 Weighted Average 0.370 56.06% Pervious Area 0.290 43.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.1 100 0.0270 0.21 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.5 36 0.0270 1.15 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.6 34 0.0200 0.99 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.9 105 0.0100 2.03 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.0 12 0.5946 5.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.9 244 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 14.0 531 Total CrozetSelfStorage_Analys is Poi nt1 Preaared by Timmons Grow ,r- Type 11 24-hr 10-year Rainfall=5.58" Subcatchment 2S: PRE-1-OFF Printed 4/11/2022 I I I 3.05 cfs ---------------- Type I124- --- r 10-year Rainfallr5.58" Runoff Area=0.660 be ' Rulroff', Volum>s--0.'1 7a', of Runoff Depth;o3.25" Flow Length=531' -Tc=14l0 nlin_ Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 11S: POST-1-ON Runoff = 1.92 cfs @ 11.97 hrs, Volume= 0.086 af, Depth> 2.79" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.090 98 Paved parking, HSG B 0.280 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.370 76 Weighted Average 0.280 75.68% Pervious Area 0.090 24.32% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: POST-1-ON Hydrograph 2 1.92 cfs Type 0 241hr 0-year RainfallT5.98rr Runbff Area=0.370 ac LRunoffVolum0=0.086af , Runoff Depth?2.79rr LL T'c=6,0 Min ON46 10 11 12 13 14 15 16 17 18 19 Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 12S: POSTA-OFF Runoff = 3.05 cfs @ 12.06 hrs, Volume= 0.179 af, Depth> 3.25" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.290 98 Paved parking, HSG B 0.290 69 50-75% Grass cover, Fair, HSG B 0.080 65 Woods/grass comb., Fair, HSG B 0.660 81 Weighted Average 0.370 56.06% Pervious Area 0.290 43.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.1 100 0.0270 0.21 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.5 36 0.0270 1.15 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.6 34 0.0200 0.99 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.9 105 0.0100 2.03 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.0 12 0.5946 5.40 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.9 244 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 14.0 531 Total CrozetSelfStorage_Analys is Poi nt1 Preaared by Timmons Grow ,r- Type 11 24-hr 10-year Rainfall=5.58" Subcatchment 12S: POST-1-OFF Printed 4/11/2022 I I I 3.05 cfs ---------------- Type I124- --- r 10-year Rainfallr5.58" Runoff Area=0.660 be ' Rulroff', Volume--0.'1 7a', of Runoff Depth;o3.25" Flow Length=531' -Tc=14l0 nlin_ Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 4/11/2022 Summary for Link 3L: PRE-1 COMBINED Inflow Area = 0.990 ac, 41.41 % Impervious, Inflow Depth > 3.19" for 10-year event Inflow = 4.45 cfs @ 12.06 hrs, Volume= 0.263 of Primary = 4.45 cfs @ 12.06 hrs, Volume= 0.263 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 3L: PRE-1 COMBINED ■ Inflow ■ Primary 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoint1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 4/11/2022 Summary for Link 13L: POST-1 COMBINED Inflow Area = 1.030 ac, 36.89% Impervious, Inflow Depth > 3.09" for 10-year event Inflow = 4.53 cfs @ 12.01 hrs, Volume= 0.265 of Primary = 4.53 cfs @ 12.01 hrs, Volume= 0.265 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 13L: POST-1 COMBINED ■ Inflow ■ Primary 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 12S POS -2A-OFF 11 S 1S PRE-2-ON POST-2A-ON 13 2S �� 6L SWM A PR 2 COMBINED 16L PRE-2A-OFF P T-2 COMBINED 5S 14S PRE-2B-OFF POST-2B-ON 15S POST-213-01FF Subcat Reach on Link Routing Diagram for CrozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group, Printed 4/11/2022 FHydroCADq) 10.10-4a s/n 08663 ® 2020 HydroCAD Software Solutions LLC C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 3.570 69 50-75% Grass cover, Fair, HSG B (1S, 2S, 11S, 12S, 14S) 1.840 98 Paved parking, HSG B (2S, 5S, 11S, 12S, 14S, 15S) 0.280 98 Paved parking, HSG C (1 S) 0.150 65 Woods/grass comb., Fair, HSG B (1S) 5.840 79 TOTAL AREA Printed 4/11/2022 C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Area Soil (acres) Group 0.000 HSG A 5.560 HSG B 0.280 HSG C 0.000 HSG D 0.000 Other 5.840 Soil Listing (all nodes) Subcatchment Numbers 1S, 2S, 5S, 11S, 12S, 14S, 15S 1S TOTAL AREA Printed 4/11/2022 C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group HSG-A HSG-B HSG-C (acres) (acres) (acres) 0.000 3.570 0.000 0.000 1.840 0.280 0.000 0.150 0.000 0.000 5.560 0.280 Ground Covers (all nodes) Printed 4/11/2022 HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) Cover Numbers 0.000 0.000 3.570 50-75% Grass cover, Fair 1 S, 2S, its, 12S, 14S 0.000 0.000 2.120 Paved parking 1 S, 2S, 5S, 11 S, 12S, 14S, 15S 0.000 0.000 0.150 Woods/grass comb., Fair 1 S 0.000 0.000 5.840 TOTAL AREA CrozetSelfStorage_AnalysisPoint2 Type // 24-hr 1-year Rainfall=3.07" Prepared by Timmons Group Printed 4/11/2022 HydroCAD® 10.10-4a s/n 08663 © 2020 HydroCAD Software Solutions LLC Paoe 5 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS:PRE-2-ON Runoff Area=1.470ac 19.05%Impervious Runoff Depth>0.86" Flow Length=297' Tc=9.1 min CN=74 Runoff=2.14 cfs 0.105 of Subcatchment2S: PRE-2A-OFF Runoff Area=1.390 ac 25.90% Impervious Runoff Depth>1.01" Flow Length=384' Tc=9.1 min CN=77 Runoff=2.42 cfs 0.118 of Subcatchment5S: PRE-213-01FF Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>2.63" Tc=6.0 min CN=98 Runoff=0.25 cfs 0.013 of Subcatchment11S: POST-2A-ON Runoff Area=1.310 ac 74.05% Impervious Runoff Depth>1.91" Tc=6.0 min CN=90 Runoff=4.49 cfs 0.209 of Subcatchment 1 2S: POST-2A-OFF Runoff Area=1.390 ac 25.90% Impervious Runoff Depth>1.01" Flow Length=384' Tc=9.1 min CN=77 Runoff=2.42 cfs 0.118 of Subcatchmentl4S: POST-213-ON Runoff Area=0.160 ac 18.75% Impervious Runoff Depth>0.86" Tc=6.0 min CN=74 Runoff=0.26 cfs 0.011 of Subcatchment 1 5S: POST-213-01FF Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>2.63" Tc=6.0 min CN=98 Runoff=0.25 cfs 0.013 of Pond 13P: SWM A Peak Elev=669.10' Storage=2,868 cf Inflow=6.76 cfs 0.326 of Outflow=3.10 cfs 0.326 of Link 6L: PRE-2 COMBINED Inflow=4.77 cfs 0.236 of Primary=4.77 cfs 0.236 of Link 16L: POST-2 COMBINED Inflow=3.27 cfs 0.350 of Primary=3.27 cfs 0.350 of Total Runoff Area = 5.840 ac Runoff Volume = 0.586 of Average Runoff Depth = 1.20" 63.70% Pervious = 3.720 ac 36.30% Impervious = 2.120 ac C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 1S: PRE-2-ON Runoff = 2.14 cfs @ 12.01 hrs, Volume= 0.105 af, Depth> 0.86" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.280 98 Paved parking, HSG C 1.040 69 50-75% Grass cover, Fair, HSG B 0.150 65 Woods/grass comb., Fair, HSG B 1.470 74 Weighted Average 1.190 80.95% Pervious Area 0.280 19.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.4 100 0.0340 0.23 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 1.5 164 0.0670 1.81 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3520 4.15 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 19 0.2700 3.64 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 297 Total Subcatchment 1S: PRE-2-ON Type I� 24-hr 1-year Rain,fa1173.07" Runoff Area=1.470 ac Runoff Volume=0.105 of Runoff Depth>0.86" Flow Length=297' 10 11 12 13 14 15 16 Time (hours) Tc=9.1 min ❑ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 2S: PRE-2A-OFF Runoff = 2.42 cfs @ 12.01 hrs, Volume= 0.118 af, Depth> 1.01" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.360 98 Paved parking, HSG B 1.030 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.390 77 Weighted Average 1.030 74.10% Pervious Area 0.360 25.90% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 100 0.0460 0.26 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.8 75 0.0460 1.50 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 88 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.8 77 0.0500 1.57 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3600 4.20 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.2 30 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 384 Total C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type // 24-hr 1-year Rainfall=3.07" Subcatchment 2S: PRE-2A-OFF Hydrograph Printed 4/11/2022 ❑ Runoff 2.42 cfs Type I� 24-hr 1-year RainfallT3.07" 2 Runoff Area=1.390 ac Runoff Volume=0.',118 of Runoff Depth>1.01" Flow Lehgth=384' T',c=9�1 min (,N=77 11 12 13 Time (hours) CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 5S: PRE-2B-OFF Runoff = 0.25 cfs @ 11.96 hrs, Volume= 0.013 af, Depth> 2.63" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.060 98 Paved parking, HSG B 0.000 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.060 98 Weighted Average 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: PRE-2B-OFF 0.28 0.25 cfs 0 26 0.24 0.2 --------------- 0.16 --L---L---- L--- L---- L- 3 0.14 v_ 0.12 01 0.08 0.06 0.04 -L- T--far Rainfai1T3:07'� Rundff Aree�0.060 i3c Rut}off Vni',ux p; 0.0_13!af- -- -Ruili f Depf1r�2:6F3"- --;---J,-- Tic=610-Min- 4 8 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 11S: POST-2A-ON Runoff = 4.49 cfs @ 11.97 hrs, Volume= 0.209 af, Depth> 1.91" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.970 98 Paved parking, HSG B 0.340 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.310 90 Weighted Average 0.340 25.95% Pervious Area 0.970 74.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: POST-2A-ON Hydrograph -------------------------------- -------- 5 4.49 cfs Type 11 24-hr 4- 1-year Rainfall=3.07" Runoff Area=1.310 ac 3 LRiujnoff',Volump=0 209' af- Runoff Depth>1.91" Tc=6,0 min 2 ON=',90 10 11 12 13 14 15 16 17 18 19 Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 12S: POST-2A-OFF Runoff = 2.42 cfs @ 12.01 hrs, Volume= 0.118 af, Depth> 1.01" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.360 98 Paved parking, HSG B 1.030 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.390 77 Weighted Average 1.030 74.10% Pervious Area 0.360 25.90% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 100 0.0460 0.26 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.8 75 0.0460 1.50 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 88 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.8 77 0.0500 1.57 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3600 4.20 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.2 30 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 384 Total C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type // 24-hr 1-year Rainfall=3.07" Subcatchment 12S: POST-2A-OFF Hydrograph Printed 4/11/2022 ❑ Runoff 2.42 cfs Type I� 24-hr 1-year RainfallT3.07" 2 Runoff Area=1.390 ac Runoff Volume=0.',118 of Runoff Depth>1.01" Flow Lehgth=384' T',c=9�1 min (,N=77 11 12 13 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 14S: POST-2B-ON Runoff = 0.26 cfs @ 11.98 hrs, Volume= 0.011 af, Depth> 0.86" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.030 98 Paved parking, HSG B 0.130 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.160 74 Weighted Average 0.130 81.25% Pervious Area 0.030 18.75% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 14S: POST-2B-ON Hydrograph ❑ Runoff c 0.14 LLr 0.12 0.08 i r O.Ofi L 0.04 Type II', 24-hr 1-year RainfallT3.07" Runoff Area=0.160 ac Runoff Volume=0.011 of Runoff Depth>0.86" ----------- Tc=6.0 min -------,----=---------(,N=74 11 12 13 14 15 16 17 18 19 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Subcatchment 15S: POST-2B-OFF Runoff = 0.25 cfs @ 11.96 hrs, Volume= 0.013 af, Depth> 2.63" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 1-year Rainfall=3.07" Area (ac) CN Description 0.060 98 Paved parking, HSG B 0.000 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.060 98 Weighted Average 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 15S: POST-2B-OFF Hydrograph 0.28 0.25 cfs 0.26 11---1 7 0.24 -----J---- --- ---- - - 0.2 0 18 w 0.16 0.14 -, --- " 0.12 01 0.06 0.04 Type II, 24-hr - ---- 1-year Rainfal1#1 i7"- RunOff Area'=0.060 ac Runoff Volume=0.',013 of Runoff Depth�-2.63" ----- Tc=6,0min- (,N=98 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Summary for Pond 13P: SWM A Printed 4/11/2022 Inflow Area = 2.700 ac, 49.26% Impervious, Inflow Depth > 1.45" for 1-year event Inflow = 6.76 cfs @ 11.98 hrs, Volume= 0.326 of Outflow = 3.10 cfs @ 12.10 hrs, Volume= 0.326 af, Atten= 54%, Lag= 7.2 min Primary = 3.10 cfs @ 12.10 hrs, Volume= 0.326 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 669.10' @ 12.10 hrs Surf.Area= 1,521 sf Storage= 2,868 cf Plug -Flow detention time= 6.7 min calculated for 0.325 of (100% of inflow) Center -of -Mass det. time= 6.3 min ( 788.1 - 781.8 ) Volume Invert Avail.Storage Storage Description #1 665.00' 9,542 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 665.00 78 0 0 666.00 299 189 189 667.00 623 461 650 668.00 1,017 820 1,470 669.00 1,468 1,243 2,712 670.00 1,976 1,722 4,434 671.00 2,540 2,258 6,692 672.00 3,160 2,850 9,542 Device Routing Invert Outlet Devices #1 Primary 662.65' 18.0" Round Culvert L= 90.8' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 662.65' / 658.11' S= 0.0500 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 665.00' 7.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 669.00' 24.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 670.45' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Primary 670.50' 10.0' long x 8.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.43 2.54 2.70 2.69 2.68 2.68 2.66 2.64 2.64 2.64 2.65 2.65 2.66 2.66 2.68 2.70 2.74 Primary OutFlow Max=3.08 cfs @ 12.10 hrs HW=669.10' (Free Discharge) 1=Culvert (Passes 3.08 cfs of 20.31 cfs potential flow) 2=Orifice/Grate (Orifice Controls 2.87 cfs @ 9.37 fps) 3=Orifice/Grate (Orifice Controls 0.20 cfs @ 1.01 fps) =Orifice/Grate ( Controls 0.00 cfs) S=Broad-Crested Rectangular Weir( Controls 0.00 cfs) CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow i c 0 w 0 W I I I I I I I I I I I, I ------------- � j L Type 1124-hr 1-year Rainfall=3.07" Printed 4/11/2022 Pond 13P: SWM A Hydrograph I I I I I I I I cfs I Inflpw:Area-z.700 ac Fea;k Elev=6f9.1:0' -- f S' - - orage=�2;868-pf- I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 11 12 13 14 15 Time (hours) Pond 13P: SWM A Stage -Discharge Discharge (cfs) ■ Inflow ■ Primary ❑ Primary CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow Pond 13P: SWM A Stage -Area -Storage Type 1124-hr 1-year Rainfall=3.07" Printed 4/11/2022 Surface/Horizontal/Wetted Area (sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000 1 II II n 672 _I I _I _I _I I _ __I _I ___11 I_I F I I F II _ _I _I Ti- ___nu ___II _I __I __ I I I __I_I ______ I I I I I I I I I I I 1 I I I I I I I u n I I II I I 1 u II 671 I I I I I I I I I 1 I I I I I I I I I I I I II I I -- 1I I I I I I I I 1 I I I I u I I I I I I I II I I I I I I I I I I I 1 I I I I I n I I I I I I I II I I 670 1 n II 1 u n II J__L I_J__I_I___LL__JL__ I I I I I I I I I I I I I I II II I I I I I I I II I I yy I I I I I I I 1 I I I I I II II I I I I I I I II II 669 1 II II II II II II 1 II II II II II II II _4+ _il _M —_N _++ O I I I I I I I I I I I I I I I II II I I I I I I I II I I I I I I I I I 1 I I I I I I I II II I I I I I I I II II i 668 1 II n II II N I I I I I I I I 1 I I I I I I I II n I I I I I I I II I I I I I I I I 1 I I I I I I I I I n I I I I I I I I I I I 1 II II II 667 I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I --�r- rr-r-�-r-rr--�---rr-�-r-r-rr--n---n--��--r-I-�--rr--n--rr-- I I I I I I II 1 I I I I I I I II II I I I I I I I II II II 1 II II II II 666 pr I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I 1 II II II Custom Stag 665 0 500 1,0001,5002,0002,5003,0003,5004,0004,5005,0005,5006,0006,5007,0007,5008,0008,5009,0009,500 ■ Surface ■ Storage C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Printed 4/11/2022 Summary for Link 6L: PRE-2 COMBINED Inflow Area = 2.920 ac, 23.97% Impervious, Inflow Depth > 0.97" for 1-year event Inflow = 4.77 cfs @ 12.01 hrs, Volume= 0.236 of Primary = 4.77 cfs @ 12.01 hrs, Volume= 0.236 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 6L: PRE-2 COMBINED ❑ Inflow ❑ Primary 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 1-year Rainfall=3.07" Printed 4/11/2022 Summary for Link 16L: POST-2 COMBINED Inflow Area = 2.920 ac, 48.63% Impervious, Inflow Depth > 1.44" for 1-year event Inflow = 3.27 cfs @ 12.09 hrs, Volume= 0.350 of Primary = 3.27 cfs @ 12.09 hrs, Volume= 0.350 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 16L: POST-2 COMBINED ■ Inflow ■ Primary 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) CrozetSelfStorage_AnalysisPoint2 Type // 24-hr 10-year Rainfall=5.58" Prepared by Timmons Group Printed 4/11/2022 HydroCAD® 10.10-4a s/n 08663 © 2020 HydroCAD Software Solutions LLC Paae 20 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS:PRE-2-ON Runoff Area=1.470ac 19.05%Impervious Runoff Depth>2.61" Flow Length=297' Tc=9.1 min CN=74 Runoff=6.54 cfs 0.320 of Subcatchment2S: PRE-2A-OFF Runoff Area=1.390 ac 25.90% Impervious Runoff Depth>2.88" Flow Length=384' Tc=9.1 min CN=77 Runoff=6.77 cfs 0.333 of Subcatchment5S: PRE-213-01FF Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>4.89" Tc=6.0 min CN=98 Runoff=0.46 cfs 0.024 of Subcatchment11S: POST-2A-ON Runoff Area=1.310 ac 74.05% Impervious Runoff Depth>4.16" Tc=6.0 min CN=90 Runoff=9.31 cfs 0.454 of Subcatchment 1 2S: POST-2A-OFF Runoff Area=1.390 ac 25.90% Impervious Runoff Depth>2.88" Flow Length=384' Tc=9.1 min CN=77 Runoff=6.77 cfs 0.333 of Subcatchmentl4S: POST-213-ON Runoff Area=0.160 ac 18.75% Impervious Runoff Depth>2.61" Tc=6.0 min CN=74 Runoff=0.78 cfs 0.035 of Subcatchment 1 5S: POST-213-01FF Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>4.89" Tc=6.0 min CN=98 Runoff=0.46 cfs 0.024 of Pond 13P: SWM A Peak Elev=670.46' Storage=5,401 cf Inflow=15.76 cfs 0.788 of Outflow=12.68 cfs 0.787 of Link 6L: PRE-2 COMBINED Inflow=13.73 cfs 0.678 of Primary=13.73 cfs 0.678 of Link 16L: POST-2 COMBINED Inflow=13.57 cfs 0.846 of Primary=13.57 cfs 0.846 of Total Runoff Area = 5.840 ac Runoff Volume = 1.525 of Average Runoff Depth = 3.13" 63.70% Pervious = 3.720 ac 36.30% Impervious = 2.120 ac C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 1S: PRE-2-ON Runoff = 6.54 cfs @ 12.01 hrs, Volume= 0.320 af, Depth> 2.61" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.280 98 Paved parking, HSG C 1.040 69 50-75% Grass cover, Fair, HSG B 0.150 65 Woods/grass comb., Fair, HSG B 1.470 74 Weighted Average 1.190 80.95% Pervious Area 0.280 19.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.4 100 0.0340 0.23 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 1.5 164 0.0670 1.81 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3520 4.15 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 19 0.2700 3.64 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 297 Total Subcatchment 1S: PRE-2-ON Hydrograph �� ❑ Runoff Type II 24-hr 10-year Rainfall=5.58" Runoff Area=1.470 ac Runoff Volume=0.320 of Runoff Depth>2.61" Flow Length=297' Tc=9.1 min CN=74 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 2S: PRE-2A-OFF Runoff = 6.77 cfs @ 12.00 hrs, Volume= 0.333 af, Depth> 2.88" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.360 98 Paved parking, HSG B 1.030 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.390 77 Weighted Average 1.030 74.10% Pervious Area 0.360 25.90% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 100 0.0460 0.26 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.8 75 0.0460 1.50 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 88 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.8 77 0.0500 1.57 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3600 4.20 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.2 30 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 384 Total CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow Type 11 24-hr 10-year Rainfall=5.58" Subcatchment 2S: PRE-2A-OFF Printed 4/11/2022 _ ❑Runoff 6.77 cfs 6 5 4 _ 1 3 2 -- Type I� 24-hr 10-year Otainfallr5.58" -------Runbff Areei=1:390-bc- i i i i i ' Ruooff', Vol',umq=0.',333', of -y Runof'� Depfh�2.8�`8" - F-low_Iehgtb -3E4-'- T,c=9:1 Min 4�NOT L, Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 5S: PRE-2B-OFF Runoff = 0.46 cfs @ 11.96 hrs, Volume= 0.024 af, Depth> 4.89" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.060 98 Paved parking, HSG B 0.000 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.060 98 Weighted Average 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: PRE-2B-OFF Hydrograph 0.5 -,----r---,----r---,- 0.46 cfs 0.48 _ _J _L _J _L _J 0.46 0.44 ---J----L---J----L---J----L- 0.42 0.4 ___ J____ L___J____L___ J____ L_ _ I I I I I I 0.36 0.34 0.32 _J 0.3 U .26 0 0.24 ---J----L---J----L---J----L- LL 0.22 0.2 0.18 I 0.12 ---J----L---J----L---J- - - - 01 0.06 - - - nnA I � � � � ■ Runoff --- Type 11, 24- hr _ AD-y-�BY_Raitlfa[CT&5 _r I I -- o Rdho#i;Vo"Ti#=A: a_ f r -- _T_ -r ._ I _ _r____ --; - ----;---LI-- Tic=l;lfl-rtm r--- �____ r--- �____ r___ N- V- I--_ I r r r 11 12 13 14 15 16 17 18 19 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 11S: POST-2A-ON Runoff = 9.31 cfs @ 11.96 hrs, Volume= 0.454 af, Depth> 4.16" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.970 98 Paved parking, HSG B 0.340 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.310 90 Weighted Average 0.340 25.95% Pervious Area 0.970 74.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: POST-2A-ON Hydrograph --------------------------------- 109.31 cfs ❑ Runoff 9 Type II 24-hr 8 10-year Rainfall=5.58rr Runoff Area01.310 ac 7 -------------------------- ;------- R-unoff-V-0L m0=0.454 of - 6 rr Runoff Depth>4.16 O5 I I I I I I I i LL Tc=6.0 min 1 1 4 CN=90 1 3 ---------------------------- - - `------------- 2 1 1 10 11 12 13 14 15 16 17 18 19 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 12S: POST-2A-OFF Runoff = 6.77 cfs @ 12.00 hrs, Volume= 0.333 af, Depth> 2.88" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.360 98 Paved parking, HSG B 1.030 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.390 77 Weighted Average 1.030 74.10% Pervious Area 0.360 25.90% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 100 0.0460 0.26 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.8 75 0.0460 1.50 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 88 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.8 77 0.0500 1.57 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3600 4.20 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.2 30 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 384 Total CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow Type 11 24-hr 10-year Rainfall=5.58" Subcatchment 12S: POST-2A-OFF Printed 4/11/2022 _ ❑Runoff 6.77 cfs 6 5 4 _ 1 3 2 -- Type I� 24-hr 10-year Otainfallr5.58" -------Runbff Areei=1:390-bc- i i i i i ' Ruooff', Vol',umq=0.',333', of -y Runof'� Depfh�2.8�`8" - F-low_Iehgtb -3E4-'- T,c=9:1 Min 4�NOT L, Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 14S: POST-2B-ON Runoff = 0.78 cfs @ 11.97 hrs, Volume= 0.035 af, Depth> 2.61" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.030 98 Paved parking, HSG B 0.130 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.160 74 Weighted Average 0.130 81.25% Pervious Area 0.030 18.75% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 14S: POST-2B-ON Hydrograph 0.8 0.75 I I I I I I 0.7 0.65 06 0.55 - 045 I-- 0 04 LL 0.35 0.25 I I I I I 02 0.15 I I I I I 0.1 ----------------- Typell'I 24 hr 10-year RainfallT5.58" Runoff Area=0.160 ac Runoff Volume=0.'1036af Runoff Depth�-2.61" Tc=6,0 min - (,N=74 I I I ------------- �II I I I I I I 11 12 13 14 15 16 17 18 19 Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Subcatchment 15S: POST-2B-OFF Runoff = 0.46 cfs @ 11.96 hrs, Volume= 0.024 af, Depth> 4.89" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-year Rainfall=5.58" Area (ac) CN Description 0.060 98 Paved parking, HSG B 0.000 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.060 98 Weighted Average 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 15S: POST-2B-OFF Hydrograph 0.5 -,----r---,----r---,- 0.46 cfs 0.48 _ _J _L _J _L _J 0.44 ---J----L---J----L---J - ---I 0.4 ___ J____ L___ J____ L___ J____ L_ _ I I I I I I 0.36 0.32 J _0.3 w ---J----L---J----L---J----L- 0 6.28 0 0.24 ---J----L---J----L---J----L- LL 0.22 0.2 016.-__J____L___J____L___J____L_ I 0.12 ---J----L---J----L---J- - - -01 0.08 O.Ofi - - - n Ild I I I r r--I--=-r--- Type II'I 24-hr- 10-year RainfallT5.58"= Runoff Area=0.060 ac- Runoff;Vol,ume=0.'10241 of RunoffDepth:4-.NI "_ - r----I---- --; --- ----;---JI-- Tic=�lfl-rtm __L--- J---- L____1___ U 1 1 1 IV- 8- I--_ I r r r 11 12 13 14 15 16 17 18 19 Time (hours) ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Summary for Pond 13P: SWM A [821 Warning: Early inflow requires earlier time span Printed 4/11/2022 Inflow Area = 2.700 ac, 49.26% Impervious, Inflow Depth > 3.50" for 10-year event Inflow = 15.76 cfs @ 11.98 hrs, Volume= 0.788 of Outflow = 12.68 cfs @ 12.04 hrs, Volume= 0.787 af, Atten= 20%, Lag= 3.4 min Primary = 12.68 cfs @ 12.04 hrs, Volume= 0.787 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 670.46' @ 12.04 hrs Surf.Area= 2,235 sf Storage= 5,401 cf Plug -Flow detention time= 6.3 min calculated for 0.785 of (100% of inflow) Center -of -Mass det. time= 6.0 min ( 770.9 - 764.9 ) Volume Invert Avail.Storage Storage Description #1 665.00' 9,542 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 665.00 78 0 0 666.00 299 189 189 667.00 623 461 650 668.00 1,017 820 1,470 669.00 1,468 1,243 2,712 670.00 1,976 1,722 4,434 671.00 2,540 2,258 6,692 672.00 3,160 2,850 9,542 Device Routing Invert Outlet Devices #1 Primary 662.65' 18.0" Round Culvert L= 90.8' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 662.65' / 658.11' S= 0.0500 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 665.00' 7.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 669.00' 24.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 670.45' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Primary 670.50' 10.0' long x 8.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.43 2.54 2.70 2.69 2.68 2.68 2.66 2.64 2.64 2.64 2.65 2.65 2.66 2.66 2.68 2.70 2.74 Primary OutFlow Max=12.51 cfs @ 12.04 hrs HW=670.43' (Free Discharge) 1=Culvert (Passes 12.51 cfs of 22.56 cfs potential flow) 2=Orifice/Grate (Orifice Controls 3.34 cfs @ 10.89 fps) 3=Orifice/Grate (Orifice Controls 9.17 cfs @ 4.58 fps) =Orifice/Grate ( Controls 0.00 cfs) S=Broad-Crested Rectangular Weir( Controls 0.00 cfs) CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow i c 0 w 0 W Pond 13P: SWM A Type 11 24-hr 10-year Rainfall=5.58" Printed 4/11/2022 I I I I I I I I I I I I 15.76 cfs ; -- ------ ----; - L JI--- lnflbwlarea= 7QG�c I I I I I I I I ' ' k Elev=_f_r70_.-_4f_'_-_ '',----� ----------------- 12.68 cfs --, I I -T -I Storage=&,401-icf- I I I I i I I I , i 1 _I _i _J , I I I I I i I I I I I ' I I , i I I I I I I I _______________--- ____ ________ I___ ____ ____II I I I I I I I I I I I I -I -T I 1 12 13 Time (hours) Pond 13P: SWM A Stage -Discharge Discharge (cfe) I InFlow ❑ Primary ❑ Primary CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow Pond 13P: SWM A Stage -Area -Storage Type 11 24-hr 10-year Rainfall=5.58" Printed 4/11/2022 Surface/Horizontal/Wetted Area (sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000 1 II II n 672 _I I _I _I _I I _ __I _I ___11 I_I F I I F II _ _I _I Ti- ___nu ___II _I __I __ I I I __I_I ______ I I I I I I I I I I I 1 I I I I I I I u n I I II I I 1 u II 671 I I I I I I I I I 1 I I I I I I I I I I I I II I I -- 1I I I I I I I I 1 I I I I u I I I I I I I II I I I I I I I I I I I 1 I I I I I n I I I I I I I II I I 670 1 n II 1 u n II J__L I_J__I_I___LL__JL__ I I I I I I I I I I I I I I II II I I I I I I I II I I yy I I I I I I I 1 I I I I I II II I I I I I I I II II 669 1 II II II II II II 1 II II II II II II II _4+ _il _M —_N _++ O I I I I I I I I I I I I I I I II II I I I I I I I II I I I I I I I I I 1 I I I I I I I II II I I I I I I I II II i 668 1 II n II II N I I I I I I I I 1 I I I I I I I II n I I I I I I I II I I I I I I I I 1 I I I I I I I I I n I I I I I I I I I I I 1 II II II 667 I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I --�r- rr-r-�-r-rr--�---rr-�-r-r-rr--n---n--��--r-I-�--rr--n--rr-- I I I I I I II 1 I I I I I I I II II I I I I I I I II II II 1 II II II II 666 pr I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I 1 II II II Custom Stag 665 0 500 1,0001,5002,0002,5003,0003,5004,0004,5005,0005,5006,0006,5007,0007,5008,0008,5009,0009,500 ■ Surface ■ Storage C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 4/11/2022 Summary for Link 6L: PRE-2 COMBINED Inflow Area = 2.920 ac, 23.97% Impervious, Inflow Depth > 2.78" for 10-year event Inflow = 13.73 cfs @ 12.00 hrs, Volume= 0.678 of Primary = 13.73 cfs @ 12.00 hrs, Volume= 0.678 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 6L: PRE-2 COMBINED r---T r---,----r" I- _ 15 --------- 13.73 cfs 14 I 13 I I I I I 12 I I I I I I I I I I 19 I I I I 9 I T -I - I H I I I U 8 I I I O 7 I I I I LL I 6 -+ 7 ❑ Inflow ❑ Primary Inflow Area=2.920 ac __T---- r___ T---- I____ r--- ,____ r___ I I I I I I I I I --T I T I r___�____r___ I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 3 2 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 4/11/2022 Summary for Link 16L: POST-2 COMBINED Inflow Area = 2.920 ac, 48.63% Impervious, Inflow Depth > 3.48" for 10-year event Inflow = 13.57 cfs @ 12.03 hrs, Volume= 0.846 of Primary = 13.57 cfs @ 12.03 hrs, Volume= 0.846 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs 13 12 11 10 9 w 8 2 7 5 4 3 2 1 Link 16L: POST-2 COMBINED - - - - - -- I I _ ❑Inflow J ❑ Primary Inflow Area=2.920 ac I I I I I I I I I I I I I I I I I I I I I I 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) CrozetSelfStorage_AnalysisPoint2 Type // 24-hr 100-year Rainfall=9.08" Prepared by Timmons Group Printed 4/11/2022 HydroCAD® 10.10-4a s/n 08663 © 2020 HydroCAD Software Solutions LLC Paae 35 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS:PRE-2-ON Runoff Area=1.470ac 19.05%Impervious Runoff Depth>5.49" Flow Length=297' Tc=9.1 min CN=74 Runoff=13.37 cfs 0.673 of Subcatchment2S: PRE-2A-OFF Runoff Area=1.390 ac 25.90% Impervious Runoff Depth>5.86" Flow Length=384' Tc=9.1 min CN=77 Runoff=13.30 cfs 0.678 of Subcatchment5S: PRE-213-01FF Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>8.03" Tc=6.0 min CN=98 Runoff=0.76 cfs 0.040 of Subcatchment11S: POST-2A-ON Runoff Area=1.310 ac 74.05% Impervious Runoff Depth>7.36" Tc=6.0 min CN=90 Runoff=15.91 cfs 0.803 of Subcatchment 1 2S: POST-2A-OFF Runoff Area=1.390 ac 25.90% Impervious Runoff Depth>5.86" Flow Length=384' Tc=9.1 min CN=77 Runoff=13.30 cfs 0.678 of Subcatchmentl4S: POST-213-ON Runoff Area=0.160 ac 18.75% Impervious Runoff Depth>5.50" Tc=6.0 min CN=74 Runoff=1.59 cfs 0.073 of Subcatchment 1 5S: POST-213-01FF Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>8.03" Tc=6.0 min CN=98 Runoff=0.76 cfs 0.040 of Pond 13P: SWM A Peak Elev=670.86' Storage=6,348 cf Inflow=28.67 cfs 1.481 of Outflow=28.22 cfs 1.480 of Link 6L: PRE-2 COMBINED Inflow=27.36 cfs 1.391 of Primary=27.36 cfs 1.391 of Link 16L: POST-2 COMBINED Inflow=30.52 cfs 1.594 of Primary=30.52 cfs 1.594 of Total Runoff Area = 5.840 ac Runoff Volume = 2.986 of Average Runoff Depth = 6.14" 63.70% Pervious = 3.720 ac 36.30% Impervious = 2.120 ac C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 100-year Rainfall=9.08" Summary for Subcatchment 1S: PRE-2-ON Runoff = 13.37 cfs @ 12.00 hrs, Volume= 0.673 af, Depth> 5.49" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-year Rainfall=9.08" Area (ac) CN Description 0.280 98 Paved parking, HSG C 1.040 69 50-75% Grass cover, Fair, HSG B 0.150 65 Woods/grass comb., Fair, HSG B 1.470 74 Weighted Average 1.190 80.95% Pervious Area 0.280 19.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.4 100 0.0340 0.23 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 1.5 164 0.0670 1.81 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3520 4.15 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 19 0.2700 3.64 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 297 Total Subcatchment 1S: PRE-2-ON I I I I 14 I I I I 1 3.: 13 1___ J____ 1___ J_ ____I__ 12 I I I I I I I I I I I 10 9 I I I I I I I I I I I I w 8 I I---- I-- 3 ---- ----------1I---- 1 1 1 0 7 I -I -i 6 1 5 4 I I I I I I 3 __ j____L____I____1____I____ 2 1 fs-1 Type II 24-hr -- 100-year Rainfall=9.08" --- Runoff Area01.470 ac --- Runoff Volume=0.673 of Runoff Depth>5.49" Flow Length=297' --- -- Tc=9.1 min 1 CN=74 L 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 100-year Rainfall=9.08" Summary for Subcatchment 2S: PRE-2A-OFF Runoff = 13.30 cfs @ 12.00 hrs, Volume= 0.678 af, Depth> 5.86" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-year Rainfall=9.08" Area (ac) CN Description 0.360 98 Paved parking, HSG B 1.030 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.390 77 Weighted Average 1.030 74.10% Pervious Area 0.360 25.90% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 100 0.0460 0.26 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.8 75 0.0460 1.50 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 88 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.8 77 0.0500 1.57 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3600 4.20 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.2 30 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 384 Total CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow Type 11 24-hr 100-year Rainfall=9.08" Subcatchment 2S: PRE-2A-OFF Hydrograph Printed 4/11/2022 I I I I I I I I I I I I I I ___�____a____I____a____L-------1----L----L---L----L----1----'---- ■ RunoH I I I I I 13.3o ct --- 13 I I I I I I 12 I I I I I I I I I 11 I I I I I I ,o I I 9 I I I I I I 8 3 I I 0 ] I I I I I I LL 6 I I I I I I I I 5 I I I I I I 4 I I I I 3 I I I p T - - - -T- T--------T- --- ._Type I_24yhr - 100-year- Otai nfa l lr 9.08 "- - --- fRt nbff gear=4.3900c-- --Autoffl`Vo�um0=0-,678j aT- ___?___-r-�___-r__1_--_T_ ------1_Runoff Depth�5.�6"--- --------flowL-ot, =43i4'-- T---- I, --- ;1--- Tc=9'1,1-Mirr- ------L----L---L----L---- _7__ +/N_1I Time (hours) CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow Type 11 24-hr 100-year Rainfall=9.08" Summary for Subcatchment SS: PRE-2B-OFF Runoff = 0.76 cfs @ 11.96 hrs, Volume= 0.040 af, Depth> 8.03" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-year Rainfall=9.08" Area (ac) CN Description 0.060 98 Paved parking, HSG B 0.000 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.060 98 Weighted Average 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment SS: PRE-2B-OFF Hydrograph 0.8 0.76 CfS ___J____J--- J____J--- J__ 0.75 i 07 0.65 1 1 0.6 0.55 0.5 0.45 3 0.4 0 0.35 0.3 0.25 0.2 0.15 0.1 ____I____r___r----r----I----r--- i -----Type A-2"r- 400 yevar-Rtajnfa1iT9:08"- RunbffArsa=0;060_ Ac_ Rur�off#ofpm�= - - - - - - ; a- R�In�f_ Depth_ $.9�3`'_ ' - - -T&&O -M ln- _ _--Ji-----_-- ---- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 100-year Rainfall=9.08" Summary for Subcatchment 11S: POST-2A-ON Runoff = 15.91 cfs @ 11.96 hrs, Volume= 0.803 af, Depth> 7.36" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-year Rainfall=9.08" Area (ac) CN Description 0.970 98 Paved parking, HSG B 0.340 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.310 90 Weighted Average 0.340 25.95% Pervious Area 0.970 74.05% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 11S: POST-2A-ON Hydrograph 17 -- - -- -- - - I I - I 1-5 S 16 1 ---y____r____1___-y _. 15 14 3 ,2 1 1 1 I I 11 ___-y___-r__-y__ N 10 ] I- �� �� � � ❑Runoff r� - Type II 24-hr 100-year Rainfall=9.08rr Runoff Area=1.310 ac --- Runoff Volume=0.803 of Runoff Depth>7.36rr 1 TAc=6.0 min-- + --- CN=90 1 1 11 12 13 14 15 16 17 18 19 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 100-year Rainfall=9.08" Summary for Subcatchment 12S: POST-2A-OFF Runoff = 13.30 cfs @ 12.00 hrs, Volume= 0.678 af, Depth> 5.86" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-year Rainfall=9.08" Area (ac) CN Description 0.360 98 Paved parking, HSG B 1.030 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 1.390 77 Weighted Average 1.030 74.10% Pervious Area 0.360 25.90% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.5 100 0.0460 0.26 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.8 75 0.0460 1.50 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.7 88 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.8 77 0.0500 1.57 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 14 0.3600 4.20 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.2 30 0.1000 2.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 9.1 384 Total CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow Type 11 24-hr 100-year Rainfall=9.08" Subcatchment 12S: POST-2A-OFF Printed 4/11/2022 I I I I I I I I I I I I I I ___�____a____I____a____L-------1----L----L---L----L----1----'---- ■ RunoH I I I I I 13.3o ct --- 13 I I I I I I 12 I I I I I I I I I 11 I I I I I I ,Q I I I I I I I I I I I 8 8 3 I I 0 ] I I I I I I LL 6 I I I I I I I I 5 I I I I I I 4 I I I I I I 3 I I I p T - - - -T- T--------T- --- ._Type I_24yhr - 100-year- Otai rifa l lr 9.08 "- - '---flurrbff Area-=4.3900c-- --Auooffl`Vo�um0=0-,678j aT - ___?___-r-�___-r__1_--_T_ ------1_Runoff Depth�5.�6"--- --------flowL-ot, =43i4'-- T---- I, --- ;1--- Tc=9'1,1-Mirr- ------L----L---L----L---- _7__ +/N_1I Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 100-year Rainfall=9.08" Summary for Subcatchment 14S: POST-2B-ON Runoff = 1.59 cfs @ 11.97 hrs, Volume= 0.073 af, Depth> 5.50" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-year Rainfall=9.08" Area (ac) CN Description 0.030 98 Paved parking, HSG B 0.130 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.160 74 Weighted Average 0.130 81.25% Pervious Area 0.030 18.75% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 14S: POST-2B-ON Hydrograph 1.59 cfs Type 0 24-hr 00-year Rainfall-9.08" Runoff Area=0.160 ac 1 LRunoff Volume=0.',073 of Runoff Depth>5.50" T'c=610 min (,N=74 10 11 12 13 14 15 16 17 18 19 Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 100-year Rainfall=9.08" Summary for Subcatchment 15S: POST-2B-OFF Runoff = 0.76 cfs @ 11.96 hrs, Volume= 0.040 af, Depth> 8.03" Printed 4/11/2022 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 100-year Rainfall=9.08" Area (ac) CN Description 0.060 98 Paved parking, HSG B 0.000 69 50-75% Grass cover, Fair, HSG B 0.000 65 Woods/grass comb., Fair, HSG B 0.060 98 Weighted Average 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, N 3 Subcatchment 15S: POST-2B-OFF Hydrograph Type III 24-hu ---L 100-yefar-Rainfa11T9.08"- -- --- RunbffArsa^0 06QOc_ I I I I I RuOff#olpmo=6:61340; af- ung _Dejpth:�8.00 ;- T&GA n ln- I I I I 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 100-year Rainfall=9.08" Summary for Pond 13P: SWM A [821 Warning: Early inflow requires earlier time span Printed 4/11/2022 Inflow Area = 2.700 ac, 49.26% Impervious, Inflow Depth > 6.58" for 100-year event Inflow = 28.67 cfs @ 11.98 hrs, Volume= 1.481 of Outflow = 28.22 cfs @ 11.99 hrs, Volume= 1.480 af, Atten= 2%, Lag= 0.4 min Primary = 28.22 cfs @ 11.99 hrs, Volume= 1.480 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 670.86' @ 11.99 hrs Surf.Area= 2,462 sf Storage= 6,348 cf Plug -Flow detention time= 5.6 min calculated for 1.475 of (100% of inflow) Center -of -Mass det. time= 5.3 min ( 758.7 - 753.4 ) Volume Invert Avail.Storage Storage Description #1 665.00' 9,542 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 665.00 78 0 0 666.00 299 189 189 667.00 623 461 650 668.00 1,017 820 1,470 669.00 1,468 1,243 2,712 670.00 1,976 1,722 4,434 671.00 2,540 2,258 6,692 672.00 3,160 2,850 9,542 Device Routing Invert Outlet Devices #1 Primary 662.65' 18.0" Round Culvert L= 90.8' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet Invert= 662.65' / 658.11' S= 0.0500 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 665.00' 7.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 669.00' 24.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 670.45' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #5 Primary 670.50' 10.0' long x 8.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.43 2.54 2.70 2.69 2.68 2.68 2.66 2.64 2.64 2.64 2.65 2.65 2.66 2.66 2.68 2.70 2.74 Primary OutFlow Max=27.67 cfs @ 11.99 hrs HW=670.85' (Free Discharge) 1=Culvert (Passes 22.44 cfs of 23.23 cfs potential flow) 2=Orifice/Grate (Orifice Controls 3.48 cfs @ 11.33 fps) 3=Orifice/Grate (Orifice Controls 11.13 cfs @ 5.56 fps) =Orifice/Grate (Weir Controls 7.83 cfs @ 2.07 fps) S=Broad-Crested Rectangular Weir(Weir Controls 5.23 cfs @ 1.49 fps) CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow 0 LL i c 0 w 0 W Pond 13P: SWM A I I I I I I I I I I I I I I I I I I I I I I i i Type 11 24-hr 100-year Rainfall=9.08" Printed 4/11/2022 I I I I I I I --lnfl4w Arp,a=x_74QAc_ I I I Pea`k Klevt,= 7;0�6`- ---- Storage=%$48-pf- I I 1 -r 1 12 13 Time (hours) Pond 13P: SWM A Stage -Discharge Discharge (cfe) ■ Inflow ■ Primary ❑ Primary CrozetSelfStorage_Analys is Poi nt2 Preaared by Timmons Grow Pond 13P: SWM A Stage -Area -Storage Type 11 24-hr 100-year Rainfall=9.08" Printed 4/11/2022 Surface/Horizontal/Wetted Area (sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 3,000 1 II II n 672 _I I _I _I _I I _ __I _I ___11 I_I F I I F II _ _I _I Ti- ___nu ___II _I __I __ I I I __I_I ______ I I I I I I I I I I I 1 I I I I I I I u n I I II I I 1 u II 671 I I I I I I I I I 1 I I I I I I I I I I I I II I I -- 1I I I I I I I I 1 I I I I u I I I I I I I II I I I I I I I I I I I 1 I I I I I n I I I I I I I II I I 670 1 n II 1 u n II J__L I_J__I_I___LL__JL__ I I I I I I I I I I I I I I II II I I I I I I I II I I yy I I I I I I I 1 I I I I I II II I I I I I I I II II 669 1 II II II II II II 1 II II II II II II II _4+ _il _M —_N _++ O I I I I I I I I I I I I I I I II II I I I I I I I II I I I I I I I I I 1 I I I I I I I II II I I I I I I I II II i 668 1 II n II II N I I I I I I I I 1 I I I I I I I II n I I I I I I I II I I I I I I I I 1 I I I I I I I I I n I I I I I I I I I I I 1 II II II 667 I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I --�r- rr-r-�-r-rr--�---rr-�-r-r-rr--n---n--��--r-I-�--rr--n--rr-- I I I I I I II 1 I I I I I I I II II I I I I I I I II II II 1 II II II II 666 pr I I I I I I I I 1 I I I I I I I II II I I I I I I I II I I 1 II II II Custom Stag 665 0 500 1,0001,5002,0002,5003,0003,5004,0004,5005,0005,5006,0006,5007,0007,5008,0008,5009,0009,500 ■ Surface ■ Storage C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 100-year Rainfall=9.08" Printed 4/11/2022 Summary for Link 6L: PRE-2 COMBINED Inflow Area = 2.920 ac, 23.97% Impervious, Inflow Depth > 5.72" for 100-year event Inflow = 27.36 cfs @ 12.00 hrs, Volume= 1.391 of Primary = 27.36 cfs @ 12.00 hrs, Volume= 1.391 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs 24 8 6 4 2 Link 6L: PRE-2 COMBINED ---- T-- - I I I -I- - - 27.36 c I I I I I I I I I I I I I T -I i I I I I I i i _ ___I____I____I_ I I I I I I I i I I I I I I I I I I T -I - T -1 ----r--- T---,---- T----I-- - -r - -- ■ Inflow • i -I -+ -I -t -y r__ ■ Primary infibw''IArea=2 920ac- ___1____r___ I I I I I I I I I I I I I I I I I I I I I I I I I I __ I____I ____I____I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I -I -T 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type/1 24-hr 100-year Rainfall=9.08" Printed 4/11/2022 Summary for Link 16L: POST-2 COMBINED Inflow Area = 2.920 ac, 48.63% Impervious, Inflow Depth > 6.55" for 100-year event Inflow = 30.52 cfs @ 11.99 hrs, Volume= 1.594 of Primary = 30.52 cfs @ 11.99 hrs, Volume= 1.594 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 16L: POST-2 COMBINED —1 ---- . J ❑Inflow ❑ Primary Inflow Area=2.920 ac I I I I I I I I I I I I I I I I I I I I I I I I I I I I I _1 _I _T _I _r _1 _r I I I I I I I I I I I I I I 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Page 1 of 1 Cut/Fill Report Generated: 2022-04-15 09:17:04 By user: Kevin.Flynn Drawing: S:\103\48757-Crozet Self Storage\DWG\C3D Model\S:\103\48757-Crozet Self Storage\DWG\C3D Model\48757-SMGRAD.dwg Volume Summary Name Type Cut Fill 2d Area Cut Fill Net Factor Factor (Sq. Ft.) (Cu. Yd.) (Cu. Yd.) (Cu. Yd.) Cut - Fill full 1.00 1.15 70510.98 3488.99 5133.90* 1644.91* Volume Totals 2d Area (Sq. Ft.) Cut (Cu. Yd.) Fill (Cu. Yd.) Net (Cu. Yd.) Total 70510.98 3488.99 5133.90* 1644.91 * * Value adjusted by cut or fill factor other than 1.0 file:///C:/Users/kevin.flynn/AppData/Local/Temp/CutFillReport.xml 4/15/2022