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HomeMy WebLinkAboutWPO202100059 Calculations 2021-10-25Crozet Self Storage ALBEMARLE COUNTY, VIRGINIA WPO PLAN DESIGN CALCULATIONS & NARRATIVE OCTOBER 25, 2021 Aso**00 TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Clint Shifflett, PE Timmons Group 608 Preston Avenue, Suite 200 Charlottesville, VA 22903 434.327.1690 CLINT W. S F LET Lit. N .54380 10/25/2021 a 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 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 2.05 acres. Water Quality: The current site is a gas station and two houses. 2.05 acres was analyzed for water quality. The total TP load reduction required is 1.29 lbs/year. The 1.29 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 Ouantity 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 LO 201 STORMWATER INLET COMPUTATIONS SHEET 1 OF ROU PROJECT G. SelfShag. DESIGNER: K M DATE 10IM2021 CHECKED: UNIM:NGLISH mmm�mm®o®om�m®m��mm®mmmmmmmmmmm��m mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmm�mmmmmmmmmmm®mm®mmmm��®� ®���mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmmm�mmmomom�mmmmmmm®mmmmmmmmmmm��m mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmm�mmmmmmmmmmm®mm®mmmm®�m� ��m�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmomom�mmm®�mm®mmmmmmmmmmm��m mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmm�mmmmmmmmmmmommmmm®mom®®� ��m�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmomommmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmm�mmmmmmmmmmmommmmmmm�®mom ®�m�®®mmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmomommmmmmmmmmmmmmmmmmmmm��m mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmmmmmmmmmmm®mmmmmmm��m� ®�m�mm®mmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmomommmmmmmmmmmmmmmmmmmmm��m mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmmmmmmmmmmm®mm®mmmm��m ��m�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmomom�mmm®�mm®mmmmmmmmmmm��m mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmm®�mmmmmmmmmmmommmmmmm�mtm� INLETSOFT BY ENSOFTEC DATE: 1=2 Ul 48767STRM STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 70 PROJECT: Crozet Self Storage LOCATION: COUNTY: Albemarle Designed by: Checked by: UNITS ENGLISH PIPE NO FROM POINT TO POMT DRAM. AREA "A" Acre (3) RUNOFF COEFF. "C" (4) CA TOTAL MLET TIME Minute¢ (7) RAM FALL lnI (8) RUNOFF Q us (9) INVERT ELEVATION$ LENGTH of Pipe FL (12) SLOPE Ft/Ft (13) SIZE (Dia Or SpaNRiae) 1. (14) SHAPE Capacityjan CFS (15)(16) VEL V. FNSec FLOW TIME Min(1) (17) REMARKS (18)101 MCR6 MENT (5) ACCUM- ULATED (6) ADDTL CA UPPER END (10) LOWER END (11) REFERENCE STA. REFERENCE (2) STA. 102 1W 0000 0000 0000 20W 2090 6-000 6230 13021 666400 659080 TL748 00% 18000 Cimtd r 3491018353 0071 211 212 210 0450 0390 0_176 0176 0-000 6-000 6230 1093 669643 667590 41056 0050 15000 Cimtd r 15&H7352 0093 209 210 2M 0240 0370 0089 0264 0-000 6-093 6203 1639 667489 667360 12917 0010 15000 Cimtd r 69964-664 0046207 208 2% 0490 0500 0245 0245 0-000 6000 6230 1526 668063 667630 86614 0005 12000 Cimtd r 27283579 0403 205 206 god 0390 0620 0242 OA87 0000 6403 6.114 2976 66]526 66]260 53289 0005 15000 CircWar 4.947 4226 021203 2M 2020590 0790 0466 1217 0-000 6613 6-055 7370 667.160 666990 34.004 0-005 19000 Cimtd r K 45 6176201 202 200 0390 0900 0351 1569 0-000 6T23 6-025 9449 666.887 666800 17434 0005 21000 Cimtd r 12136 5590 0052 301 302 3. 0070 0900 0-063 0063 0000 6000 6230 0392 666970 66 755 21446 0010 15000 Circular 6996 3-081 0116 48757-STRM PROJECT: Crozet Self Storage DESIGNED BY: HYDRAULIC GRADE LINE ANALYSIS Checked: INCIDENCE PROBABILITY 10 Year INLET OR JUNCTION INLET STATION OUTLET WATER SURFACE ELEV. DW PIPE Do (In) DESIGN DISCH. D0 (CPS) LENGTH PIPE LO (Ft) FRICTION SLOPE,M (FT/FT) FRICTION LOSS Hf (ED JUNCTION LOSS FINAL H (ED InIN MUS Su . Eik e n Rim Ekv Co..mm Vo Ho (Ft) pi N w VP32g Hi Ayk HA M 13 Ht 05 At 102 660.28 18 13.02 77.75 1.31% 1.02 18.35 1.31 0 0 0 0 0 0 0 1.31 0 TRUE 2.33 662.61 668.8 OK -6.19 202 669.32 21 9.45 17.43 0.30% 0.06 6.59 0.12 7.37 6.18 38.15 0.42 0.16 0.95 0 0.27 0.35 TRUE 0.23 669.56 670.29 OK -0.74 204 669.65 18 7.37 34 0.42% 0.14 6.18 0.1 2.98 4.23 12.58 0.28 0.1 70.12 0.21 0.41 0.53 TRUE 0.41 669.96 670.33 OK -0.37 210 669.95 15 1.64 12.92 0.05% 0.01 4.66 0.08 1.09 7.36 8.04 0.64 0.29 84.72 0.65 0.93 1.21 TRUE 0.61 670.57 670.61 OK -0.04 212 670.67 15 1.09 41.06 0.02% 0.01 7.35 0.21 0 0 0 0 0 0 0 0.21 0.27 TRUE 0.16 670.71 675.5 OK -4.79 206 669.95 15 2.98 53.29 0.18% 0.1 4.23 0.07 1.63 3.58 5.46 0.2 0.07 10.44 0.03 0.16 0.21 TRUE 0.2 670.16 671.02 OK -0.86 208 670.16 12 1.53 86.61 0.16% 0.14 3.58 0.06 0 0 0 0 0 0 0 0.06 0.06 TRUE 0.2 670.36 677 OK -6.64 302 669.32 15 0.39 21.46 0.00% 0 3.08 0.04 0 0 0 0 0 0 0 0.04 0.05 TRUE 0.06 669.37 670.93 OK -1.66 Virginia Runoff Reduction Method WOMsheel 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: 44490 Total Rainfall (in): 43 Total Disturbed Acreage: 2.05 Site Land Cover Summary Pre-ReDevelopment Land Cover (acres) A soils B Soils C Soils D Soils Totals %of Total Forest/Open (acres) 0.00 0.30 0.00 0.00 0.30 15 Managed Turf (acres) 1 0.00 1.30 0.00 0.00 1.30 63 Impervious Cover (acres) 1 0.00 0.45 0.00 0.00 0.45 22 2.05 100 Post-ReDevelopment Land Cover (acres) !soils BSolis CSolis DSolis Totals %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf(acres) 0.00 1.03 0.00 0.00 1.03 50 Impervious Cover (acres) 0.00 1.02 0.00 0.00 1.02 50 2.05 100 Site Tv and Land Cover Nutrient Loads Final Post -Development Post Post- Adjusted Pre- (Post-ReDevelopment ReDevelopment Development ReDevelopment &New Impervious) (New Impervious) Site Rv 0.57 0.43 0.95 0.43 Treatment Volume(ft') 4,265 2,300 1,966 2,300 TP Load (lb/yr) 2.68 1.44 1.24 1.44 Total TP Load Reduction Required (lb/yr) 1.29 0.29 1.00 Final Post -Development Load (Post-ReDevelopment&New Impervious) Pre- ReDevelopment TN Load (Ib/yr) 19.17 11.36 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) Ib acrer 0.98 1.31 0.98 Summary Prior Virginia Runoff Reduction Method WoMsheel ----------------------------- _-_ ------ _-_ ------ _-_ _-_._.___._.._.___._.._.___._.._.___._.._.___._.._.___._.._.___._.._.___._.._.___._.._.___._.._.___- Site Compliance Summary Maximum %Reduction Required Below PrieReDevelopment Load 20% Total Runoff Volume Reduction (f[s) 0 Total TP Load Reduction Achieved (Ih/yr) 0.00 Total TN Load Reduction Achieved (Ih/yr) 0.00 Remaining Post Development TP Load 2.68 (lh/yr) Remaining TP Load Reduction(16/yr) 1.29 Required Summary Print Virginia Runoff Reduction Method WOMsheel Drainage Area Summary D.A. A D.A. B D.A. C D.A. D D.A. E Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.0o coo Managed Turf (acres) 0.00 0.00 0.00 0.00 0.0o coo Impervious Cover (acres) 0.00 0.00 0.00 0.00 0.0o coo Total Area (acres) 0.00 0.00 0.00 0.00 0.00 0.00 Drainage Area Compliance Summary D.A. A D.A. B D.A. C D.A. D D.A. E Total TP Load Reduced (Ib/yr) 0.00 0.00 0.00 D.DD coo 0.00 TN Load Reduced (lb/yr) 0.00 0.00 0.00 D.DD coo 0.00 Summary Print Virginia Runoff Reduction Method! WoMsheel Runoff Volume and CN Calculations ITarget Rainfall EVeot(in) 1 0.00 1 0.00 1 0.00 1 Drainage Areas RV&CN Drainage Area Drainage Area Drainage Area Drainage Area Drainage Area ON 0 0 0 0 0 RR (ft°) 0 0 0 0 0 1-year return period RV wo RR(ws-in) 0.00 0.00 OAO 0.00 0.00 RVw RR (.sin) 0.00 0.00 OAO 0.00 0.00 CN adjusted 0 0 0 0 0 2-year return period RV wo RR(ws-in) 0.00 0.00 OAO 0.00 0.00 RV. RR (wsn) 0.00 0.00 OAO 0.00 0.00 CN adjusted 0 0 0 0 0 10-year return period o0.R (ws-in) 0.00 0.00 0.00 0.00 0.00 PRklw:R0.(wsin) 0.00 0.00 0.00 0.00 0.00 CN adjusted 0 0 0 0 0 Summary Print PRE-1-ON 3L 2S-1 COMBINED O PRE-1-OFF Subcat Reach Aon Llnk (i� POST-1-ON 4L POST-1 COMBINED 5S POST-1-OFF C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 1.070 69 50-75% Grass cover, Fair, HSG B (1S, 2S, 5S, 6S) 0.670 98 Paved parking, HSG B (2S, 5S, 6S) 0.150 98 Paved parking, HSG C (1S) 0.120 65 Woods/grass comb., Fair, HSG B (1S) 2.010 81 TOTAL AREA Printed 10/21/2021 C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 1.860 HSG B 1S, 2S, 5S, 6S 0.150 HSG C 1S 0.000 HSG D 0.000 Other 2.010 TOTAL AREA Printed 10/21/2021 C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Ground Covers (all nodes) Printed 10/21/2021 HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 1.070 0.000 0.000 0.000 1.070 50-75% Grass cover, Fair 1S, 2S, 5S, 6S 0.000 0.670 0.150 0.000 0.000 0.820 Paved parking 1S, 2S, 5S, 6S 0.000 0.120 0.000 0.000 0.000 0.120 Woods/grass comb., Fair 1S 0.000 1.860 0.150 0.000 0.000 2.010 TOTAL AREA CrozetSelfStorage_AnalysisPoint1 Type 1124-hr 1-year Rainfall=3.07" Prepared by Timmons Group Printed 10/21/2021 HydroCADO 10.00-20 s/n 06538 © 2017 HydroCAD Software Solutions LLC Paae 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 Subcatchment 1S: PRE-1-ON Runoff Area=0.600 ac 25.00% Impervious Runoff Depth>0.91" Flow Length=380' Tc=14.9 min CN=75 Runoff=0.75 cfs 0.045 of Subcatchment 2S: PRE -I -OFF Runoff Area=0.420 ac 66.67% Impervious Runoff Depth>1.74" Flow Length=531' Tc=14.0 min CN=88 Runoff=1.04 cfs 0.061 of Subcatchment 5S: POST-1 -OFF Runoff Area=0.430 ac 67.44% Impervious Runoff Depth>1.82" Flow Length=530' Tc=15.4 min CN=89 Runoff=1.06 cfs 0.065 of Subcatchment 6S: POST-1 -ON Runoff Area=0.560 ac 17.86% Impervious Runoff Depth>0.85" Flow Length=384' Tc=16.4 min CN=74 Runoff=0.62 cfs 0.040 of Link 3L: PRE-1 COMBINED Inflow=1.78 cfs 0.106 of Primary=1.78 cfs 0.106 of Link 4L: POSTA COMBINED Inflow=1.67 cfs 0.105 of Primary=1.67 cfs 0.105 of Total Runoff Area = 2.010 ac Runoff Volume = 0.211 of Average Runoff Depth = 1.26" 59.20% Pervious = 1.190 ac 40.80% Impervious = 0.820 ac C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type 1124-hr 1-year Rainfall=3.07" Printed 10/21/2021 Summary for Subcatchment 1S: PREA-ON Runoff = 0.75 cfs @ 12.08 hrs, Volume= 0.045 af, Depth> 0.91" 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 0.150 98 Paved parking, HSG C 0.330 69 50-75% Grass cover, Fair, HSG B 0.120 65 Woods/grass comb., Fair, HSG B 0.600 75 Weighted Average 0.450 75.00% Pervious Area 0.150 25.00% 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 fos iL�'>�Iiri[IFS CrozetSelfStorage AnalysisPointl Prepared by Timmons Group 0 LL 0. 0. Type1124-hr 1-year Rainfall=3.07" Printed 10/21/2021 Subcatchment 1S: PRE-1-ON Hydrograph 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (howl) ■ Rurwff C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type 1124-hr 1-year Rainfall=3.07" Printed 10/21/2021 Summary for Subcatchment 2S: PREA-OFF Runoff = 1.04 cfs @ 12.06 hrs, Volume= 0.061 af, Depth> 1.74" 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 0.140 69 50-75% Grass cover, Fair, HSG B 0.280 98 Paved parking, HSG B 0.420 88 Weighted Average 0.140 33.33% Pervious Area 0.280 66.67% 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 AnalysisPointl Prepared by Timmons Group L^ u Type1124-hr 1-year Rainfall=3.07" Printed 10/21/2021 Subcatchment 2S: PREA-OFF Hydrograph Time (houm) ❑ Runoff C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type 1124-hr 1-year Rainfall=3.07" Printed 10/21/2021 Summary for Subcatchment 5S: POSTA-OFF Runoff = 1.06 cfs @ 12.07 hrs, Volume= 0.065 af, Depth> 1.82" 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 0.140 69 50-75% Grass cover, Fair, HSG B 0.290 98 Paved parking, HSG B 0.430 89 Weighted Average 0.140 32.56% Pervious Area 0.290 67.44% 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 0.1 15 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.8 117 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.4000 4.43 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.8 239 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.4 530 Total CrozetSelfStorage AnalysisPoint7 Prepared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Printed 10/21/2021 Subcatchment 5S: POSTA-OFF Hydrograph ■ Runoff Time (houm) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type 1124-hr 1-year Rainfall=3.07" Printed 10/21/2021 Summary for Subcatchment 6S: POST-1-ON Runoff = 0.62 cfs @ 12.10 hrs, Volume= 0.040 af, Depth> 0.85" 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 0.460 69 50-75% Grass cover, Fair, HSG B 0.100 98 Paved parking, HSG B 0.560 74 Weighted Average 0.460 82.14% Pervious Area 0.100 17.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 100 0.0100 0.14 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.5 22 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.4000 4.43 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.8 239 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps i6 P1 Subcatchment 6S: POST-1-ON Hydrograph ■ Rurwff 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type 1124-hr 1-year Rainfall=3.07" Printed 10/21/2021 Summary for Link 3L: PRE-1 COMBINED Inflow Area = 1.020 ac, 42.16% Impervious, Inflow Depth > 1.25" for 1-year event Inflow = 1.78 cfs @ 12.07 hrs, Volume= 0.106 of Primary = 1.78 cfs @ 12.07 hrs, Volume= 0.106 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs 0 Link 3L: PRE-1 COMBINED Hydrograph Time (hours) ■ Inflow ❑ Primary C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type 1124-hr 1-year Rainfall=3.07" Printed 10/21/2021 Summary for Link 4L: POST-1 COMBINED Inflow Area = 0.990 ac, 39.39% Impervious, Inflow Depth > 1.27" for 1-year event Inflow = 1.67 cfs @ 12.08 hrs, Volume= 0.105 of Primary = 1.67 cfs @ 12.08 hrs, Volume= 0.105 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 4L: POST-1 COMBINED Hydrograph ■ Inflow ❑ Primary Time (hours) CrozetSelfStorage_AnalysisPoint1 Type // 24-hr 10-year Rainfall=5.58" Prepared by Timmons Group Printed 10/21/2021 HydroCADO 10.00-20 s/n 06538 © 2017 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 Subcatchment 1S: PRE-1-ON Runoff Area=0.600 ac 25.00% Impervious Runoff Depth>2.69" Flow Length=380' Tc=14.9 min CN=75 Runoff=2.26 cfs 0.135 of Subcatchment 2S: PREA-OFF Runoff Area=0.420 ac 66.67% Impervious Runoff Depth>3.95" Flow Length=531' Tc=14.0 min CN=88 Runoff=2.27 cfs 0.138 of Subcatchment 5S: POST-1 -OFF Runoff Area=0.430 ac 67.44% Impervious Runoff Depth>4.05" Flow Length=530' Tc=15.4 min CN=89 Runoff=2.27 cfs 0.145 of Subcatchment 6S: POST-1 -ON Runoff Area=0.560 ac 17.86% Impervious Runoff Depth>2.60" Flow Length=384' Tc=16.4 min CN=74 Runoff=1.95 cfs 0.121 of Link 3L: PRE-1 COMBINED Inflow=4.52 cfs 0.273 of Primary=4.52 cfs 0.273 of Link 4L: POSTA COMBINED Inflow=4.20 cfs 0.267 of Primary=4.20 cfs 0.267 of Total Runoff Area = 2.010 ac Runoff Volume = 0.539 of Average Runoff Depth = 3.22" 59.20% Pervious = 1.190 ac 40.80% Impervious = 0.820 ac C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Summary for Subcatchment 1S: PREA-ON Runoff = 2.26 cfs @ 12.07 hrs, Volume= 0.135 af, Depth> 2.69" 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 0.150 98 Paved parking, HSG C 0.330 69 50-75% Grass cover, Fair, HSG B 0.120 65 Woods/grass comb., Fair, HSG B 0.600 75 Weighted Average 0.450 75.00% Pervious Area 0.150 25.00% 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 fos iL�'>�Iiri[IFS CrozetSelfStorage AnalysisPointl Prepared by Timmons Group Type // 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Subcatchment 1S: PRE-1-ON Hydrograph ■ Runoff Time (houm) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Summary for Subcatchment 2S: PREA-OFF Runoff = 2.27 cfs @ 12.05 hrs, Volume= 0.138 af, Depth> 3.95" 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 0.140 69 50-75% Grass cover, Fair, HSG B 0.280 98 Paved parking, HSG B 0.420 88 Weighted Average 0.140 33.33% Pervious Area 0.280 66.67% 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 AnalysisPointl Prepared by Timmons Group Type // 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Subcatchment 2S: PREA-OFF Hydrograph ■ Runoff Time (houm) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Summary for Subcatchment 5S: POSTA-OFF Runoff = 2.27 cfs @ 12.07 hrs, Volume= 0.145 af, Depth> 4.05" 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 0.140 69 50-75% Grass cover, Fair, HSG B 0.290 98 Paved parking, HSG B 0.430 89 Weighted Average 0.140 32.56% Pervious Area 0.290 67.44% 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 0.1 15 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.8 117 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.4000 4.43 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.8 239 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.4 530 Total CrozetSelfStorage AnalysisPoint7 Prepared by Timmons Group Type // 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Subcatchment 5S: POSTA-OFF Hydrograph ■ Runoff Time (houm) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Summary for Subcatchment 6S: POST-1-ON Runoff = 1.95 cfs @ 12.09 hrs, Volume= 0.121 af, Depth> 2.60" 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 0.460 69 50-75% Grass cover, Fair, HSG B 0.100 98 Paved parking, HSG B 0.560 74 Weighted Average 0.460 82.14% Pervious Area 0.100 17.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 100 0.0100 0.14 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.5 22 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.4000 4.43 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.8 239 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps Subcatchment 6S: POST-1-ON ■ Rurwff II 24-hr 10-year Rainfall=5.58" Runoff Area=0.560 ac Runoff Volume=0.121 of Runoff Depth>2.60" Flow Length=384' Tc=16.4 min CN=74 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Summary for Link 3L: PRE-1 COMBINED Inflow Area = 1.020 ac, 42.16% Impervious, Inflow Depth > 3.21" for 10-year event Inflow = 4.52 cfs @ 12.06 hrs, Volume= 0.273 of Primary = 4.52 cfs @ 12.06 hrs, Volume= 0.273 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 Hydrograph ■ Inflow ■ Primary Time (hours) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type/1 24-hr 10-year Rainfall=5.58" Printed 10/21/2021 Summary for Link 4L: POST-1 COMBINED Inflow Area = 0.990 ac, 39.39% Impervious, Inflow Depth > 3.23" for 10-year event Inflow = 4.20 cfs @ 12.08 hrs, Volume= 0.267 of Primary = 4.20 cfs @ 12.08 hrs, Volume= 0.267 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 4L: POST-1 COMBINED Hydrograph ❑ Inflow ❑ Primary Time (hours) CrozetSelfStorage_AnalysisPoint1 Type // 24-hr 100-year Rainfall=9.08" Prepared by Timmons Group Printed 10/21/2021 HydroCADO 10.00-20 s/n 06538 © 2017 HydroCAD Software Solutions LLC Paae 25 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 Subcatchment 1S: PRE-1-ON Runoff Area=0.600 ac 25.00% Impervious Runoff Depth>5.60" Flow Length=380' Tc=14.9 min CN=75 Runoff=4.61 cfs 0.280 of Subcatchment 2S: PREA-OFF Runoff Area=0.420 ac 66.67% Impervious Runoff Depth>7.13" Flow Length=531' Tc=14.0 min CN=88 Runoff=3.97 cfs 0.250 of Subcatchment 5S: POST-1 -OFF Runoff Area=0.430 ac 67.44% Impervious Runoff Depth>7.24" Flow Length=530' Tc=15.4 min CN=89 Runoff=3.93 cfs 0.259 of Subcatchment 6S: POST-1 -ON Runoff Area=0.560 ac 17.86% Impervious Runoff Depth>5.48" Flow Length=384' Tc=16.4 min CN=74 Runoff=4.03 cfs 0.256 of Link 3L: PRE-1 COMBINED Inflow=8.56 cfs 0.530 of Primary=8.56 cfs 0.530 of Link 4L: POSTA COMBINED Inflow=7.93 cfs 0.515 of Primary=7.93 cfs 0.515 of Total Runoff Area = 2.010 ac Runoff Volume = 1.045 of Average Runoff Depth = 6.24" 59.20% Pervious = 1.190 ac 40.80% Impervious = 0.820 ac C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type // 24-hr 100-year Rainfall=9.08" Printed 10/21/2021 Summary for Subcatchment 1S: PREA-ON Runoff = 4.61 cfs @ 12.07 hrs, Volume= 0.280 af, Depth> 5.60" 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 0.150 98 Paved parking, HSG C 0.330 69 50-75% Grass cover, Fair, HSG B 0.120 65 Woods/grass comb., Fair, HSG B 0.600 75 Weighted Average 0.450 75.00% Pervious Area 0.150 25.00% 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 fos iL�'>�Iiri[IFS CrozetSelfStorage AnalysisPointl Prepared by Timmons Group Type 1124-hr 100-year Rainfall=9.08" Printed 10/21/2021 Subcatchment 1S: PRE-1-ON Hydrograph Runoff Ar Runoff Volum.11 o� Flow Runoff II i I.A. Dz a 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (houm) ■ Runoff C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type // 24-hr 100-year Rainfall=9.08" Printed 10/21/2021 Summary for Subcatchment 2S: PREA-OFF Runoff = 3.97 cfs @ 12.05 hrs, Volume= 0.250 af, Depth> 7.13" 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 0.140 69 50-75% Grass cover, Fair, HSG B 0.280 98 Paved parking, HSG B 0.420 88 Weighted Average 0.140 33.33% Pervious Area 0.280 66.67% 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 AnalysisPointl Prepared by Timmons Group Type 1124-hr 100-year Rainfall=9.08" Printed 10/21/2021 Subcatchment 2S: PREA-OFF Hydrograph ■ Runoff Time (houm) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type // 24-hr 100-year Rainfall=9.08" Printed 10/21/2021 Summary for Subcatchment 5S: POSTA-OFF Runoff = 3.93 cfs @ 12.07 hrs, Volume= 0.259 af, Depth> 7.24" 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 0.140 69 50-75% Grass cover, Fair, HSG B 0.290 98 Paved parking, HSG B 0.430 89 Weighted Average 0.140 32.56% Pervious Area 0.290 67.44% 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 0.1 15 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.8 117 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.4000 4.43 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.8 239 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.4 530 Total CrozetSelfStorage AnalysisPoint7 Prepared by Timmons Group Type 11 24-hr 100-year Rainfall=9.08" Printed 10/21/2021 Subcatchment 5S: POSTA-OFF Hydrograph ■ Runoff Time (houm) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type // 24-hr 100-year Rainfall=9.08" Printed 10/21/2021 Summary for Subcatchment 6S: POST-1-ON Runoff = 4.03 cfs @ 12.08 hrs, Volume= 0.256 af, Depth> 5.48" 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 0.460 69 50-75% Grass cover, Fair, HSG B 0.100 98 Paved parking, HSG B 0.560 74 Weighted Average 0.460 82.14% Pervious Area 0.100 17.86% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 100 0.0100 0.14 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 0.5 22 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.4000 4.43 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 3.8 239 0.0220 1.04 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps i6 P1 Subcatchment 6S: POST-1-ON ❑ RunoH 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type // 24-hr 100-year Rainfall=9.08" Printed 10/21/2021 Summary for Link 3L: PRE-1 COMBINED Inflow Area = 1.020 ac, 42.16% Impervious, Inflow Depth > 6.23" for 100-year event Inflow = 8.56 cfs @ 12.06 hrs, Volume= 0.530 of Primary = 8.56 cfs @ 12.06 hrs, Volume= 0.530 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 Hydrograph ■ InMov ■ Primary Time (hours) C rozetSelfStorage_AnalysisPoi nt1 Prepared by Timmons Group Type // 24-hr 100-year Rainfall=9.08" Printed 10/21/2021 Summary for Link 4L: POST-1 COMBINED Inflow Area = 0.990 ac, 39.39% Impervious, Inflow Depth > 6.24" for 100-year event Inflow = 7.93 cfs @ 12.08 hrs, Volume= 0.515 of Primary = 7.93 cfs @ 12.08 hrs, Volume= 0.515 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 4L: POST-1 COMBINED Hydrograph ❑ Inflow ❑ Primary Time (hours) 5S PO POST-2A-ON -2A-OFF F)S 1S PRE-2-ON 9P 2S �„ 3L SWM A ;'2'COMBINED 4L PRE-2A-OFF P T-2 COMBINED 7S 9S PRE-2B-OFF POST-2B-ON $S PRE-2B-OFF Subcat Reach On Link Routing Diagram for CrozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group, Printed 10/2512021 HydroCAD® 10.10-4a s/n 08663 02020 HydroCAD Software Solutions LLC C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Printed 10/25/2021 Rainfall Events Listing 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 3.07 2 2 10-year Type II 24-hr Default 24.00 1 5.58 2 3 100-year Type II 24-hr Default 24.00 1 9.08 2 C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 3.680 69 50-75% Grass cover, Fair, HSG B (1 S, 2S, 5S, 6S, 7S, 8S, 9S) 1.730 98 Paved parking, HSG B (2S, 5S, 6S, 7S, 8S) 0.300 98 Paved parking, HSG C (1S) 0.180 65 Woods/grass comb., Fair, HSG B (1S) 5.890 79 TOTAL AREA Printed 10/25/2021 C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 5.590 HSG B 1S, 2S, 5S, 6S, 7S, 8S, 9S 0.300 HSG C 1S 0.000 HSG D 0.000 Other 5.890 TOTAL AREA Printed 10/25/2021 C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Ground Covers (all nodes) Printed 10/25/2021 HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 3.680 0.000 0.000 0.000 3.680 50-75% Grass cover, Fair 1S, 2S, 5S, 6S, 7S, 8S, 9S 0.000 1.730 0.300 0.000 0.000 2.030 Paved parking 1S, 2S, 5S, 6S, 7S, 8S 0.000 0.180 0.000 0.000 0.000 0.180 Woods/grass comb., Fair 1S 0.000 5.590 0.300 0.000 0.000 5.890 TOTAL AREA C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Pipe Listing (all nodes) Printed 10/25/2021 Line# Node In -Invert Out -Invert Length Slope n Diam/Width Height Inside -Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 5S 0.00 0.00 100.0 0.0200 0.013 15.0 0.0 6.0 2 5S 0.00 0.00 76.0 0.0150 0.013 15.0 0.0 6.0 3 6S 0.00 0.00 100.0 0.0200 0.013 15.0 0.0 6.0 4 6S 0.00 0.00 76.0 0.0150 0.013 15.0 0.0 6.0 5 9P 666.40 659.08 77.0 0.0951 0.013 18.0 0.0 0.0 CrozetSelfStorage_AnalysisPoint2 Type 1124-hr 1-year Rainfall=3.07" Prepared by Timmons Group Printed 10/25/2021 HydroCAD® 10.10-4a s/n 08663 ©2020 HydroCAD Software Solutions LLC Page 7 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 Subcatchment1S: PRE-2-ON Runoff Area=1.450 ac 20.69% Impervious Runoff Depth>0.91" Flow Length=297' Tc=9.1 min CN=75 Runoff=2.24 cfs 0.110 of Subcatchment2S: PRE-2A-OFF Runoff Area=1.390 ac 25.18% Impervious Runoff Depth>0.96" Flow Length=384' Tc=9.1 min CN=76 Runoff=2.28 cfs 0.111 of Subcatchment5S: POST-2A-OFF Runoff Area=1.390 ac 25.18% Impervious Runoff Depth>0.96" Flow Length=490' Tc=10.1 min CN=76 Runoff=2.19 cfs 0.111 of Subcatchment6S: POST-2A-ON Runoff Area=1.380 ac 65.94% Impervious Runoff Depth>1.74" Flow Length=466' Tc=16.2 min CN=88 Runoff=3.20 cfs 0.200 of Subcatchment7S: PRE-26-01FF Runoff Area=0.090 ac 77.78% Impervious Runoff Depth>2.09" Tc=6.0 min CN=92 Runoff=0.33 cfs 0.016 of Subcatchment8S: PRE-26-01FF Runoff Area=0.080 ac 62.50% Impervious Runoff Depth>1.67" Tc=6.0 min CN=87 Runoff=0.25 cfs 0.011 of Subcatchment9S: POST-26-ON Runoff Area=0.110 ac 0.00% Impervious Runoff Depth>0.63" Tc=6.0 min CN=69 Runoff=0.13 cfs 0.006 of Pond 9P: SWM A Peak Elev=668.61' Storage=0.046 of Inflow=5.22 cfs 0.311 of Outflow=3.42 cfs 0.310 of Link 3L: PRE-2 COMBINED Inflow=4.82 cfs 0.237 of Primary=4.82 cfs 0.237 of Link4L: POST-2 COMBINED Inflow=3.48 cfs 0.326 of Primary=3.48 cfs 0.326 of Total Runoff Area = 5.890 ac Runoff Volume = 0.565 of Average Runoff Depth = 1.15" 65.53% Pervious = 3.860 ac 34.47% Impervious = 2.030 ac C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Subcatchment 1S: PRE-2-ON Runoff = 2.24 cfs @ 12.01 hrs, Volume= 0.110 af, Depth> 0.91" 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 0.300 98 Paved parking, HSG C 0.970 69 50-75% Grass cover, Fair, HSG B 0.180 65 Woods/grass comb., Fair, HSG B 1.450 75 Weighted Average 1.150 79.31 % Pervious Area 0.300 20.69% Impervious Area Tc Length Slope Velocity Capacity Description 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 fos 9.1 297 Total Subcatchment 1S: PRE-2-ON Hydrograph r2 2 N I I I I 3 I I 1 III Type II 24-hr 1-year Rainfall=3.07" Runoff Area=1.450 ac Runoff Volume=0.110 of Runoff Depth>0.91" Flow Length=297' Tc=9.1 min CN=75 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 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Subcatchment 2S: PRE-2A-OFF Runoff = 2.28 cfs @ 12.01 hrs, Volume= 0.111 af, Depth> 0.96" 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 1.040 69 50-75% Grass cover, Fair, HSG B 0.350 98 Paved parking, HSG B 1.390 76 Weighted Average 1.040 74.82% Pervious Area 0.350 25.18% 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 rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type 1124-hr 1-year Rainfall=3.07" Printed 10/25/2021 Subcatchment 2S: PRE-2A-OFF Hydrograph - i 1 i 1 12 13 Time (horns) j Type II 24ihr 1-year ItalnfallT3.Q7" Runbff Areal=1.390 'lac Runoff'', Vol'',ume=0.'',111'', of Runoff Du,pth 4.96" ---Flow-LehgttY=334- Tc=9:1 r"in ON=,b6 ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Subcatchment 5S: POST-2A-OFF Runoff = 2.19 cfs @ 12.03 hrs, Volume= 0.111 af, Depth> 0.96" 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 1.040 69 50-75% Grass cover, Fair, HSG B 0.350 98 Paved parking, HSG B 1.390 76 Weighted Average 1.040 74.82% Pervious Area 0.350 25.18% 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 0.1 16 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 2.0 82 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 18 0.2800 3.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.3 100 0.0200 5.95 4.58 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corrugated PE, smooth interior 0.2 76 0.0150 5.16 3.96 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corruqated PE, smooth interior 10.1 490 Total r= 0.22' r= 0.22' C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type 1124-hr 1-year Rainfall=3.0T' Printed 10/25/2021 Subcatchment 5S: POST-2A-OFF Hydrograph ■ Runoff 2.19 c .TypeJ24ihr_ -- --- 2 1-year Rainfall-3.07" Runoff Areal=1.390 'ac Runoff', Vof,ume=0.',111', of Runoff Depth 4.96" LL T - - - F4ow-Lehgth=490' - 1 Tc=10,1 Min ON=,76 11 12 13 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Subcatchment 6S: POST-2A-ON Runoff = 3.20 cfs @ 12.08 hrs, Volume= 0.200 af, Depth> 1.74" 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 0.470 69 50-75% Grass cover, Fair, HSG B 0.910 98 Paved parking, HSG B 1.380 88 Weighted Average 0.470 34.06% Pervious Area 0.910 65.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 100 0.0100 0.14 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 3.5 149 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 18 0.2800 3.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.3 100 0.0200 5.95 4.58 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corrugated PE, smooth interior 0.2 76 0.0150 5.16 3.96 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corruqated PE, smooth interior 16.2 466 Total r= 0.22' r= 0.22' C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type 1124-hr 1-year Rainfall=3.07" Printed 10/25/2021 Subcatchment GS: POST-2A-ON Hydrograph C 3 I II �2 LL I I ------------------ + 'I Time (hours) i i i I I I I i i i I I I I TYpe 11 2"r- 1-year Rainfall9--3.07" Runoff Areal=1.380'ac Run, off_'; VoIum_q=Q.,200raf- Runoff Depth: 1II JC Flow Length=466' Tc=16�2 Min ON=88 ■ RunoH C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Subcatchment 7S: PRE-2B-OFF Runoff = 0.33 cfs @ 11.97 hrs, Volume= 0.016 af, Depth> 2.09" 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 0.070 98 Paved parking, HSG B 0.020 69 50-75% Grass cover, Fair, HSG B 0.090 92 Weighted Average 0.020 22.22% Pervious Area 0.070 77.78% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: PRE-2B-OFF Hydrograph 0.36 1 034 0as ae 1 -_ Ty+--2-4+ 0 Pe r0.32 03 . _ 4mrarRainaFlr�Q7"- 0.28 _ _ L _L _1 _L 0.26 L L- -J------- --Runbf-Ame-09Qac- 022I LI RunoffVofpme 0-0--- at ,I . N_ 0.2 I I I I I I I I - -- 1RunotDepIth:2.O9 0.18 --,----r 1 1 ,----r---,----�- 1 1 1 1 1 -�----1----r----1--7c=81Diriin 1 1 1 E 0.16 0.14 0.12 1 1 -+ -1 1 1 1 1 1 -+ 1 1 1 -+ 1 -. I 1 1 1 1 _ -. -1 -+ -1 -+-�1sN-92 1 1 1 1 T 1 0.1 _- _- _ _- I _� 0.08 I 1 1 1 1 L___ I____L___ I---_�____1____i 0.0 0.04 I I I I I I I I I I 1 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 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Subcatchment 8S: PRE-2B-OFF Runoff = 0.25 cfs @ 11.97 hrs, Volume= 0.011 af, Depth> 1.67" 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 0.050 98 Paved parking, HSG B 0.030 69 50-75% Grass cover, Fair, HSG B 0.080 87 Weighted Average 0.030 37.50% Pervious Area 0.050 62.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 8S: PRE-2B-OFF Hydrograph 0.26 = ° 0.24 I I I I I i I I I I I I ---------------------------- 0.22 I I 0.2 ' 0.18 ------------------ 0.16 ' N " 014 I I I I I I Q., I I I I I I 0.08 I I I I I I 0.06 004 I I I I I I I I I I I hr ---- .... II-Type-I�_24 -- I I I I I I 11___J1-y-ear_RairtfalLT3 QZ ---Runoff-Area (L080 ac- RuOoff ;Vt 1OfftO=O.-Of ; of -- -Runo Deprth;?1:Q7"- � I I I -- -- . - - -- T&C0 rriin YN VI 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 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 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Subcatchment 9S: POST-2B-ON Runoff = 0.13 cfs @ 11.99 hrs, Volume= 0.006 af, Depth> 0.63" 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 0.110 69 50-75% Grass cover, Fair, HSG B 0.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 9S: POST-2B-ON Hydrograph 0.14 0.13 0.12 i I I I 0.09 li li li li N 0 08 i � I I I I I i 007 c 0.06 li 0.05 0 04 ____ ___ __________ i i 0.02 Type H-24�hr- 1-year Rainfall: 3:07"- Runoff Area=0.110 ac Runoff Volume=0.006'af -- -Runoff Depth>0.63"- ----- Tc=6.0 min- q N=169- i 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 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Pond 9P: SWM A Inflow Area = 2.770 ac, 45.49% Impervious, Inflow Depth > 1.35" for 1-year event Inflow = 5.22 cfs @ 12.05 hrs, Volume= 0.311 of Outflow = 3.42 cfs @ 12.17 hrs, Volume= 0.31Oaf, Atten= 35%, Lag= 7.4 min Primary = 3.42 cfs @ 12.17 hrs, Volume= 0.310 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 668.61' @ 12.17 hrs Surf.Area= 0.032 ac Storage= 0.046 of Plug -Flow detention time= 9.3 min calculated for 0.310 of (99% of inflow) Center -of -Mass det. time= 6.8 min ( 799.1 - 792.3 ) Volume Invert Avail.Storage Storage Description #1 666.50' 0.144 of Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 666.50 0.012 0.000 0.000 667.50 0.021 0.016 0.016 668.50 0.031 0.026 0.043 669.50 0.043 0.037 0.080 670.50 0.057 0.050 0.130 670.75 0.060 0.015 0.144 Device Routing Invert Outlet Devices #1 Primary 666.40' 18.0" Round CMP_Round 18" L= 77.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 666.40' / 659.08' S= 0.0951 T Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 666.50' 10.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 668.80' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 669.10' 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=3.40 cfs @ 12.17 hrs HW=668.59' (Free Discharge) 1=CMP_Round 18" (Passes 3.40 cfs of 8.07 cfs potential flow) �2=Orifice/Grate (Orifice Controls 3.40 cfs @ 6.23 fps) 3=Orif ice/G rate ( Controls 0.00 cfs) = B road-C rested Rectangular Weir( Controls 0.00 cfs) C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Pond 9P: SWM A Hydrograph Type 1124-hr 1-year Rainfall=3.07" Printed 10/25/2021 I I I I I I I I I � ■ Inflow li li li li ■ Primary Inftow ,LArea=7 770-6- I PeAk r;lev:6Q8.611' Stbrage0.046 of 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 1 12 13 Time (houm) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Link 3L: PRE-2 COMBINED Inflow Area = 2.930 ac, 24.57% Impervious, Inflow Depth > 0.97" for 1-year event Inflow = 4.82 cfs @ 12.01 hrs, Volume= 0.237 of Primary = 4.82 cfs @ 12.01 hrs, Volume= 0.237 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 3L: PRE-2 COMBINED Hydrograph FE ]—I n—fl.—. ❑ Primary Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 1-year Rainfall=3.07" Printed 10/25/2021 Summary for Link 4L: POST-2 COMBINED Inflow Area = 2.960 ac, 44.26% Impervious, Inflow Depth > 1.32" for 1-year event Inflow = 3.48 cfs @ 12.17 hrs, Volume= 0.326 of Primary = 3.48 cfs @ 12.17 hrs, Volume= 0.326 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 4L: POST-2 COMBINED Hydrograph FE ]—I n—fl.—. ❑ Primary Time (hours) CrozetSelfStorage_AnalysisPoint2 Type 1124-hr 10-year Rainfall=5.58" Prepared by Timmons Group Printed 10/25/2021 HydroCAD® 10.10-4a s/n 08663 ©2020 HydroCAD Software Solutions LLC Page 22 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 Subcatchment1S: PRE-2-ON Runoff Area=1.450 ac 20.69% Impervious Runoff Depth>2.70" Flow Length=297' Tc=9.1 min CN=75 Runoff=6.66 cfs 0.326 of Subcatchment2S: PRE-2A-OFF Runoff Area=1.390 ac 25.18% Impervious Runoff Depth>2.79" Flow Length=384' Tc=9.1 min CN=76 Runoff=6.58 cfs 0.323 of Subcatchment5S: POST-2A-OFF Runoff Area=1.390 ac 25.18% Impervious Runoff Depth>2.79" Flow Length=490' Tc=10.1 min CN=76 Runoff=6.33 cfs 0.323 of Subcatchment6S: POST-2A-ON Runoff Area=1.380 ac 65.94% Impervious Runoff Depth>3.95" Flow Length=466' Tc=16.2 min CN=88 Runoff=6.98 cfs 0.454 of Subcatchment7S: PRE-26-01FF Runoff Area=0.090 ac 77.78% Impervious Runoff Depth>4.36" Tc=6.0 min CN=92 Runoff=0.66 cfs 0.033 of Subcatchment8S: PRE-26-01FF Runoff Area=0.080 ac 62.50% Impervious Runoff Depth>3.86" Tc=6.0 min CN=87 Runoff=0.54 cfs 0.026 of Subcatchment9S: POST-26-ON Runoff Area=0.110 ac 0.00% Impervious Runoff Depth>2.18" Tc=6.0 min CN=69 Runoff=0.46 cfs 0.020 of Pond 9P: SWM A Peak Elev=669.32' Storage=0.072 of Inflow=12.86 cfs 0.777 of Outflow=12.47 cfs 0.774 of Link 3L: PRE-2 COMBINED Inflow=13.83 cfs 0.682 of Primary=13.83 cfs 0.682 of Link4L: POST-2 COMBINED Inflow=12.99 cfs 0.820 of Primary=12.99 cfs 0.820 of Total Runoff Area = 5.890 ac Runoff Volume = 1.504 of Average Runoff Depth = 3.06" 65.53% Pervious = 3.860 ac 34.47% Impervious = 2.030 ac C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Subcatchment 1S: PRE-2-ON Runoff = 6.66 cfs @ 12.01 hrs, Volume= 0.326 af, Depth> 2.70" 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 0.300 98 Paved parking, HSG C 0.970 69 50-75% Grass cover, Fair, HSG B 0.180 65 Woods/grass comb., Fair, HSG B 1.450 75 Weighted Average 1.150 79.31 % Pervious Area 0.300 20.69% Impervious Area Tc Length Slope Velocity Capacity Description 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 fos 9.1 297 Total Subcatchment 1S: PRE-2-ON Hydrograph ❑ Runoff 7 s.ea as s I 5 li N 3 � LL j 3 i i Type II 24-hr 10-year Rainfall=5.58" Runoff Area=1.450 ac Runoff Volume=0.326 of Runoff Depth>2.70" Flow Length=297' Tc=9.1 min CN=75 10 11 12 13 14 15 16 17 18 19 20 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Subcatchment 2S: PRE-2A-OFF Runoff = 6.58 cfs @ 12.01 hrs, Volume= 0.323 af, Depth> 2.79" 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 1.040 69 50-75% Grass cover, Fair, HSG B 0.350 98 Paved parking, HSG B 1.390 76 Weighted Average 1.040 74.82% Pervious Area 0.350 25.18% 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 rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type 11 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Subcatchment 2S: PRE-2A-OFF Hydrograph i i i i i i i T 8.58 ch i i i i i i i r-------- ! -- --- : Type 1124ihr- 6 10-year I�ai 1 91-5.618" --J--- Runoff Areal=1:390 �[c- Runoff Vol',umip=0.',323',of 4 Runoff Depth;�2.*' --F 4oW-Lehgth=38W- 3 Tc=90 r"in 2 N= 6 Time (hours) ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Subcatchment 5S: POST-2A-OFF [471 Hint: Peak is 138% of capacity of segment #7 [471 Hint: Peak is 160% of capacity of segment #8 Runoff = 6.33 cfs @ 12.02 hrs, Volume= 0.323 af, Depth> 2.79" 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 1.040 69 50-75% Grass cover, Fair, HSG B 0.350 98 Paved parking, HSG B 1.390 76 Weighted Average 1.040 74.82% Pervious Area 0.350 25.18% 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 0.1 16 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 2.0 82 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 18 0.2800 3.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.3 100 0.0200 5.95 4.58 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corrugated PE, smooth interior 0.2 76 0.0150 5.16 3.96 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corruqated PE, smooth interior 10.1 490 Total r= 0.22' r= 0.22' C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type 11 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Subcatchment 5S: POST-2A-OFF Hydrograph -- ----'i -------i`--- 1 Type ]I 2#hr- 1p-year ItainfallT5.518 Runoff Areal=1.390 'ac Rupaff'', Vo l ume=II.}323 af- Runoff Depth:�2.7I,9" --- FIoW-Lehgt --= 0'- Tc=101 rein Time (hours) ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Subcatchment 6S: POST-2A-ON [471 Hint: Peak is 152% of capacity of segment #5 [471 Hint: Peak is 176% of capacity of segment #6 Runoff = 6.98 cfs @ 12.08 hrs, Volume= 0.454 af, Depth> 3.95" 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 0.470 69 50-75% Grass cover, Fair, HSG B 0.910 98 Paved parking, HSG B 1.380 88 Weighted Average 0.470 34.06% Pervious Area 0.910 65.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 100 0.0100 0.14 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 3.5 149 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 18 0.2800 3.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.3 100 0.0200 5.95 4.58 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corrugated PE, smooth interior 0.2 76 0.0150 5.16 3.96 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corruqated PE, smooth interior r= 0.22' r= 0.22' C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type 11 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Subcatchment GS: POST-2A-ON Hydrograph i i I I I I i i i I I I I i i i I I I I I Type II 24ihr -;I--- 10year RalnfAH: 5-58"- Runbff Areal=1.380 'ac -- ---- r-- - - - - -- i - - -- I- - -- 7----Ir--- Runoff ll Volllume=0.�14541I of ----1-Runoft-Quptti:�3.9i5"- r _ _ _ Ff l_oy� Lehgth=466' _ I Tc=16,2l�npin I 1\ I I Time (hours) i ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Subcatchment 7S: PRE-2B-OFF Runoff = 0.66 cfs @ 11.96 hrs, Volume= 0.033 af, Depth> 4.36" 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 0.070 98 Paved parking, HSG B 0.020 69 50-75% Grass cover, Fair, HSG B 0.090 92 Weighted Average 0.020 22.22% Pervious Area 0.070 77.78% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: PRE-2B-OFF Hydrograph 07 1 I I I I I I I I 0.65 __ -Type-0-2-4 0.6 _a-0-year-Rairdall:; 58"- 0.55 J, J, -ftrtdff-ATee-Or.l90'ac- 0.5 0.45 Runoff Vof'u-et 4--033`af w -__ L __ __ L _ n, f Depth�4 36 Nso � 0.4 V �.. I _J _L _J _L _J _L y. /� c 0.35 _ _ _ i_ _ T4�6,i7 AI1ri- 0.3 .__!____I____!____! ___!____! _ ___!____I !____1___ i I I i i i '-i i I I i I 0.25 0.2 I I I I I I 0.15 I I I I I i I I I I I I 0.1 I I I I I i 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 II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Subcatchment 8S: PRE-2B-OFF Runoff = 0.54 cfs @ 11.97 hrs, Volume= 0.026 af, Depth> 3.86" 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 0.050 98 Paved parking, HSG B 0.030 69 50-75% Grass cover, Fair, HSG B 0.080 87 Weighted Average 0.030 37.50% Pervious Area 0.050 62.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 8S: PRE-2B-OFF 0.6 ' I° 0.55 0.5 ' 0.45 04 . 0.35 N 0.25 0.2 0.15 0.1 n 051 . _L _ Type II 24-hr 10-year Rainfall=5.58" Runoff Area=0.080 ac Runoff Volume=0.026 of ---,-Runoff Depth>3.86"- Tc=6.0 min- 1 -- CN- 87 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 II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Subcatchment 9S: POST-2B-ON Runoff = 0.46 cfs @ 11.98 hrs, Volume= 0.020 af, Depth> 2.18" 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 0.110 69 50-75% Grass cover, Fair, HSG B 0.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 9S: POST-2B-ON Hydrograph 0.5 1 _L _J 0.48 ',i __�____� ,____r___i____ eae as ___i____i _ 0.46 _� _L _J _L _ _� Type II 24-hr 0.42 , __J____L L___J____L_ ----- 10-year Rainfall=5.58"- 0.38 0.36 ' _--,----'�- -;----r----------------- Runoff Area=0.110 ac- 0.34 ---L----�-- -----L---L----L- -- RlunoffrVbI =0-M of 0.3 ---L- - - -- -_ _________i _ . ---------------------- Ru1notDepth-;x2-j8"- `. 026--- ------ ------- 0 0.24 -"----L-------�--------�-- - -- `-- TC= trim ________~_ _ 0.2 -------'�- -----------�- --- ----i----'---'i----*--- 0.18 (: N='69= 0,4 0.12-----------------'- ---'------------------------�--- 0.1 ------------ 10 11 12 13 14 15 16 17 18 19 20 Time (hours) ❑ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Pond 9P: SWM A Inflow Area = 2.770 ac, 45.49% Impervious, Inflow Depth > 3.37" for 10-year event Inflow = 12.86 cfs @ 12.04 hrs, Volume= 0.777 of Outflow = 12.47 cfs @ 12.07 hrs, Volume= 0.774 af, Atten= 3%, Lag= 1.5 min Primary = 12.47 cfs @ 12.07 hrs, Volume= 0.774 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 669.32' @ 12.07 hrs Surf.Area= 0.041 ac Storage= 0.072 of Plug -Flow detention time= 7.3 min calculated for 0.774 of (100% of inflow) Center -of -Mass det. time= 5.7 min ( 779.3 - 773.6 ) Volume Invert Avail.Storage Storage Description #1 666.50' 0.144 of Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 666.50 0.012 0.000 0.000 667.50 0.021 0.016 0.016 668.50 0.031 0.026 0.043 669.50 0.043 0.037 0.080 670.50 0.057 0.050 0.130 670.75 0.060 0.015 0.144 Device Routing Invert Outlet Devices #1 Primary 666.40' 18.0" Round CMP_Round 18" L= 77.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 666.40' / 659.08' S= 0.0951 T Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 666.50' 10.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 668.80' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 669.10' 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=12.26 cfs @ 12.07 hrs HW=669.31' (Free Discharge) 1=CMP_Round 18" (Inlet Controls 9.88 cfs @ 5.59 fps) �2=Orifice/Grate (Passes < 4.06 cfs potential flow) 3=Orif ice/G rate (Passes < 11.30 cfs potential flow) = B road-C rested Rectangular Weir(Weir Controls 2.38 cfs @ 1.12 fps) C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type 11 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Pond 9P: SWM A Hydrograph I ---------- r --- FEInflow 14 I I I II fz.es c----- ---7----I----i __—__II____I_ ■Primary fL —1----il ifl IowArm& c- 13 1247 cfs •7 Y 12 ,,' - „ ' I I I I I -----Qea;k-Elev�6Q9.32'- I I I I I I 10 , —1 T__—T___—I I I I I I l ---'I Stbra"=9.072 a#- g I I I I I I I I I I I ' I I 7 i ' I I I I I I I 6 , I I I I I I I I I I 5 I r - - - -r I I I r__- I - I----r---r----r I __ I I I I I I I 4 , I I I I I I I I I I I , , I I I I I I I I I I I I 2 - ---- 1 12 13 Time (hours) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Link 3L: PRE-2 COMBINED Inflow Area = 2.930 ac, 24.57% Impervious, Inflow Depth > 2.79" for 10-year event Inflow = 13.83 cfs @ 12.00 hrs, Volume= 0.682 of Primary = 13.83 cfs @ 12.00 hrs, Volume= 0.682 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs 1 13 12 11 10 Y 9 V .r 8 3 O 7 LL 6 5 4 3 2 1 0 5 Link 3L: PRE-2 COMBINED Hydrograph I I I I I I I I I 113.33 cfa ------------T-- r 383�° ---inflow Area=2.930 ac- I I I I I I I iI I I I I I 6 7 I 1 Time (hours) 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 4 J L I I ❑ Inflow ❑ Primary C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type II 24-hr 10-year Rainfall=5.58" Printed 10/25/2021 Summary for Link 4L: POST-2 COMBINED Inflow Area = 2.960 ac, 44.26% Impervious, Inflow Depth > 3.32" for 10-year event Inflow = 12.99 cfs @ 12.06 hrs, Volume= 0.820 of Primary = 12.99 cfs @ 12.06 hrs, Volume= 0.820 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 4L: POST-2 COMBINED Hydrograph 14 1 11 10 g I I I I I I I I I I I y LL 6 I I I I I I 4 ___ - I I I I I I I I 3 I I I I 1 'I 'I ❑ Inflow ❑Primary I nfllowArea=Z-96a 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 12 13 14 Time (hours) CrozetSelfStorage_AnalysisPoint2 Type 1124-hr 100-year Rainfall=9.08" Prepared by Timmons Group Printed 10/25/2021 HydroCAD® 10.10-4a s/n 08663 ©2020 HydroCAD Software Solutions LLC Page 37 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 Subcatchment1S: PRE-2-ON Runoff Area=1.450 ac 20.69% Impervious Runoff Depth>5.61" Flow Length=297' Tc=9.1 min CN=75 Runoff=13.42 cfs 0.678 of Subcatchment2S: PRE-2A-OFF Runoff Area=1.390 ac 25.18% Impervious Runoff Depth>5.73" Flow Length=384' Tc=9.1 min CN=76 Runoff=13.09 cfs 0.664 of Subcatchment5S: POST-2A-OFF Runoff Area=1.390 ac 25.18% Impervious Runoff Depth>5.73" Flow Length=490' Tc=10.1 min CN=76 Runoff=12.62 cfs 0.664 of Subcatchment6S: POST-2A-ON Runoff Area=1.380 ac 65.94% Impervious Runoff Depth>7.13" Flow Length=466' Tc=16.2 min CN=88 Runoff=12.21 cfs 0.820 of Subcatchment7S: PRE-26-01FF Runoff Area=0.090 ac 77.78% Impervious Runoff Depth>7.56" Tc=6.0 min CN=92 Runoff=1.11 cfs 0.057 of Subcatchment8S: PRE-26-01FF Runoff Area=0.080 ac 62.50% Impervious Runoff Depth>7.03" Tc=6.0 min CN=87 Runoff=0.95 cfs 0.047 of Subcatchment9S: POST-26-ON Runoff Area=0.110 ac 0.00% Impervious Runoff Depth>4.90" Tc=6.0 min CN=69 Runoff=0.99 cfs 0.045 of Pond 9P: SWM A Peak Elev=669.71' Storage=0.089 of Inflow=23.96 cfs 1.484 of Outflow=23.76 cfs 1.480 of Link 3L: PRE-2 COMBINED Inflow=27.53 cfs 1.399 of Primary=27.53 cfs 1.399 of Link4L: POST-2 COMBINED Inflow=24.92 cfs 1.572 of Primary=24.92 cfs 1.572 of Total Runoff Area = 5.890 ac Runoff Volume = 2.975 of Average Runoff Depth = 6.06" 65.53% Pervious = 3.860 ac 34.47% Impervious = 2.030 ac C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 100-year Rainfall=9.08" Printed 10/25/2021 Summary for Subcatchment 1S: PRE-2-ON Runoff = 13.42 cfs @ 12.00 hrs, Volume= 0.678 af, Depth> 5.61" 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 0.300 98 Paved parking, HSG C 0.970 69 50-75% Grass cover, Fair, HSG B 0.180 65 Woods/grass comb., Fair, HSG B 1.450 75 Weighted Average 1.150 79.31 % Pervious Area 0.300 20.69% Impervious Area Tc Length Slope Velocity Capacity Description 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 14 :F is 13 12 11 10 _ __ __ __1____L__ 8 0 7 6 5 1 4 3 ' 1____'____1____L___J_ 2 Type II 24-hr 100-year Rainfall=9.08" Runoff Area=1.450 ac Runoff Volume=0.678 of Runoff Depth>5.61" Flow Length=297' Tc=9.1 min CN=75 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" Printed 10/25/2021 Summary for Subcatchment 2S: PRE-2A-OFF Runoff = 13.09 cfs @ 12.00 hrs, Volume= 0.664 af, Depth> 5.73" 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 1.040 69 50-75% Grass cover, Fair, HSG B 0.350 98 Paved parking, HSG B 1.390 76 Weighted Average 1.040 74.82% Pervious Area 0.350 25.18% 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 rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type II 24-hr 100-year Rainfa&9.08" Printed 10/25/2021 Subcatchment 2S: PRE-2A-OFF Hydrograph ------------'--------'-------------'--------' ---- 14 19. 13 ------1-i -- - Type-1�24,6hr- ---1----T----I----T----r----I----T----r, 12 so , „ '0a____-____I ___i ___I -----1QyeritinfM9Q8- ---Runbfred=1.304ac - o I I I I I I I I I I I I I 9 - -- ------------ ----I -- - Ru offlrVojumO=0:1664?af --------------------------- ------------------------------- - --RawftDepth; 5-&t3_'-- O 7 1 1 1 1 LL -1 -T -I -T -r -T -T -flow Lefigth�384r 6 _ _ _I_______ __ _1________ I � 1 � � '1 1---i'c=Amin - - ------I------------~---�-------------F--------------�+r%- -- 4 1 1 1 tN=76 1 1 1 3 1 I 1 1 ________1 _I _1 _L _J_ ___I __1____L_ I I I I I I I 2 5 6 7 8 9 10 11 12 13 Time (hours) ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 100-year Rainfall=9.08" Printed 10/25/2021 Summary for Subcatchment 5S: POST-2A-OFF [471 Hint: Peak is 276% of capacity of segment #7 [471 Hint: Peak is 318% of capacity of segment #8 Runoff = 12.62 cfs @ 12.01 hrs, Volume= 0.664 af, Depth> 5.73" 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 1.040 69 50-75% Grass cover, Fair, HSG B 0.350 98 Paved parking, HSG B 1.390 76 Weighted Average 1.040 74.82% Pervious Area 0.350 25.18% 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 0.1 16 0.0800 1.98 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 2.0 82 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 18 0.2800 3.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.3 100 0.0200 5.95 4.58 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corrugated PE, smooth interior 0.2 76 0.0150 5.16 3.96 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corruqated PE, smooth interior 10.1 490 Total r= 0.22' r= 0.22' C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type II 24-hr 100-year Rainfa&9.08" Printed 10/25/2021 Subcatchment 5S: POST-2A-OFF Hydrograph 14 I I 13 12 12 ----------------- 9 I I I I 6 7 3 u 6 5 � � -------- --,- ,4 3 - 2 -- --------'----I----------------------- I I I I i I I I I I 62 ch 24i ype � M q _-_100-year Otainfalfr3II8'r- Runb_ff_ Area=1.390'ac _I _7 ___r _y ____r____I .___Y____ RuMtoff_V-oMumQ=O.66t af_ - - t-Runoff DeptFro&7�3"- ---- --- flow Lettgth=4W- --TC=10,1 rrjln _ 5 6 7 8 9 10 11 12 13 Time (hours) ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 100-year Rainfall=9.08" Printed 10/25/2021 Summary for Subcatchment 6S: POST-2A-ON [471 Hint: Peak is 267% of capacity of segment #5 [471 Hint: Peak is 308% of capacity of segment #6 Runoff = 12.21 cfs @ 12.08 hrs, Volume= 0.820 af, Depth> 7.13" 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 0.470 69 50-75% Grass cover, Fair, HSG B 0.910 98 Paved parking, HSG B 1.380 88 Weighted Average 0.470 34.06% Pervious Area 0.910 65.94% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 100 0.0100 0.14 Sheet Flow, Grass: Short n= 0.150 P2= 3.71" 3.5 149 0.0100 0.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 18 0.2800 3.70 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 0.1 23 0.0200 2.87 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.3 100 0.0200 5.95 4.58 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corrugated PE, smooth interior 0.2 76 0.0150 5.16 3.96 Pipe Channel, CMP_Round 15" 15.0" Round w/ 6.0" inside fill Area= 0.8 sf Perim= 3.4' n= 0.013 Corruqated PE, smooth interior r= 0.22' r= 0.22' C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type II 24-hr 100-year Rainfa&9.08" Printed 10/25/2021 Subcatchment 6S: POST-2A-ON Hydrograph i 13 1221 cfs ,2 _- i Type_I� 24ihr -T „ i _ --,4 _ - 100-� :w Rainfallr8.Il8' _ - -- .- - - Ftunbff Areak=4.380-'ac - 9 -- -- T I - - -- r - -- RurtoffrVo�um0=0-.820;af- ---- -- - ---T-Runoff Depths-Mlw- -------- 1Flow Le -- h--b-fi�- ---- _ 5 � - -- _ Tg'=16'4_Mln_- 4 _NEAR_ 3 Time (hours) ■ Runoff C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 100-year Rainfall=9.08" Printed 10/25/2021 Summary for Subcatchment 7S: PRE-2B-OFF Runoff = 1.11 cfs @ 11.96 hrs, Volume= 0.057 af, Depth> 7.56" 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 0.070 98 Paved parking, HSG B 0.020 69 50-75% Grass cover, Fair, HSG B 0.090 92 Weighted Average 0.020 22.22% Pervious Area 0.070 77.78% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: PRE-2B-OFF I I I I i I I I I I I 1.11 cfa I I I i-- Type II 24-hr I I I 100-year Rainfall=9.08" I I I Runoff Area=0.090 ac I I I Runoff Volume=0.057 of Runoff Depth>7.56" LL Tc=6.0 min CN=92 0 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" Printed 10/25/2021 Summary for Subcatchment 8S: PRE-2B-OFF Runoff = 0.95 cfs @ 11.96 hrs, Volume= 0.047 af, Depth> 7.03" 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 0.050 98 Paved parking, HSG B 0.030 69 50-75% Grass cover, Fair, HSG B 0.080 87 Weighted Average 0.030 37.50% Pervious Area 0.050 62.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 8S: PRE-2B-OFF Hydrograph ❑ Runoff 1 Type II 24-hr 100-year Rainfall=9.08" Runoff Area=0.080 ac Runoff Volume=0.047 of Runoff Depth>7.03" Tc=6.0 min CN=87 0 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 11 24-hr 100-year Rainfall=9.08" Printed 10/25/2021 Summary for Subcatchment 9S: POST-2B-ON Runoff = 0.99 cfs @ 11.97 hrs, Volume= 0.045 af, Depth> 4.90" 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 0.110 69 50-75% Grass cover, Fair, HSG B 0.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 9S: POST-2B-ON Hydrograph ❑ Runoff Type II 24-hr 100-year Rainfall=9.08" Runoff Area=0.110 ac Runoff Volume=0.045 of { I Runoff Depth>4.90" N Tc=6.0 min ANEE`�, 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 11 24-hr 100-year Rainfall=9.08" Printed 10/25/2021 Summary for Pond 9P: SWM A [821 Warning: Early inflow requires earlier time span Inflow Area = 2.770 ac, 45.49% Impervious, Inflow Depth > 6.43" for 100-year event Inflow = 23.96 cfs @ 12.04 hrs, Volume= 1.484 of Outflow = 23.76 cfs @ 12.05 hrs, Volume= 1.480 af, Atten= 1%, Lag= 0.9 min Primary = 23.76 cfs @ 12.05 hrs, Volume= 1.480 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 669.71' @ 12.05 hrs Surf.Area= 0.046 ac Storage= 0.089 of Plug -Flow detention time= 5.9 min calculated for 1.480 of (100% of inflow) Center -of -Mass det. time= 4.7 min ( 765.3 - 760.7 ) Volume Invert Avail.Storage Storage Description #1 666.50' 0.144 of Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 666.50 0.012 0.000 0.000 667.50 0.021 0.016 0.016 668.50 0.031 0.026 0.043 669.50 0.043 0.037 0.080 670.50 0.057 0.050 0.130 670.75 0.060 0.015 0.144 Device Routing Invert Outlet Devices #1 Primary 666.40' 18.0" Round CMP_Round 18" L= 77.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 666.40' / 659.08' S= 0.0951 T Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 666.50' 10.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 668.80' 36.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Primary 669.10' 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=23.68 cfs @ 12.05 hrs HW=669.71' (Free Discharge) 1=CMP_Round 18" (Inlet Controls 10.75 cfs @ 6.08 fps) �2=Orifice/Grate (Passes < 4.39 cfs potential flow) 3=Orif ice/G rate (Passes < 26.85 cfs potential flow) = B road-C rested Rectangular Weir(Weir Controls 12.93 cfs @ 2.11 fps) C rozetSelfSto rage_Analys is Poi nt2 Prepared by Timmons Grow Type II 24-hr 100-year Rainfa&9.08" Printed 10/25/2021 Pond 9P: SWM A Hydrograph ■Inflow I i I 26 --- ■Primary I_ I_ I_ I_ 23.]Bcfa 24 ---Jnfl�oW�:Area-2.-77GAc- I I I I I I I I I I 22 ',,, -------,------------; --- ; ---# a(ki lev"-"9.-74`- 20--------- ------ Stbra a=0.089 of I I 16 ' I I I I I I I — 14 - I I 3 I I LL 12 , , I I I I ' I I , � I I I I I , ' I I 4 1 12 13 Time (horns) C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 100-year Rainfall=9.08" Printed 10/25/2021 Summary for Link 3L: PRE-2 COMBINED Inflow Area = 2.930 ac, 24.57% Impervious, Inflow Depth > 5.73" for 100-year event Inflow = 27.53 cfs @ 12.00 hrs, Volume= 1.399 of Primary = 27.53 cfs @ 12.00 hrs, Volume= 1.399 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 3L: PRE-2 COMBINED Hydrograph 28 I I I I 26- I I I I I 24 I I 22 I I 20 I I 18 � I I -- 16 I I 3 LL 14 I 12 I I -_____ 10 I I I I 8 6 L5 4 2 0 6 7 8 9 10 11 Time (hours) Inflow Area=2.930 ac I I I I I I I I I I I I I I ____ I I I I I- r - I I I I I I I I I I I I I I I I _J _L 4 ❑ Inflow ❑ Primary C rozetSelfStorage_AnalysisPoint2 Prepared by Timmons Group Type 11 24-hr 100-year Rainfall=9.08" Printed 10/25/2021 Summary for Link 4L: POST-2 COMBINED Inflow Area = 2.960 ac, 44.26% Impervious, Inflow Depth > 6.37" for 100-year event Inflow = 24.92 cfs @ 12.04 hrs, Volume= 1.572 of Primary = 24.92 cfs @ 12.04 hrs, Volume= 1.572 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Link 4L: POST-2 COMBINED Hydrograph FE ]—I n—fl.—. ❑ Primary Time (hours)