Loading...
Hydrology ReportHydrology Report Control Concepts Chanhassen, MN Prepared by Loucks June 15, 2018 Loucks Project No. 17516.00 i■ LOUCKS CITY OF CHANHASSEN RECEIVED JUN 152018 WM ASSEN R ANMW DEPT PLANNING I CIVIL ENGINEERING I LAND SURVEYING I LANDSCAPE ARCHITECTURE I ENVIRONMENTAL www.loucksinc.com 1 7200 Hemlock Lane, Suite 300, Maple Grove, MN 55369 1 763.424.5505 Control Concepts Chanhassen, Minnesota Stormwater Management Plan Table of Contents Page Number Introduction..................................................................................................................................1 Methodology................................................................................................................................1 ExistingConditions.......................................................................................................................2 ProposedConditions....................................................................................................................2 BestManagement Practices.........................................................................................................5 Conclusion....................................................................................................................................b Appendices HydroCAD Report -Existing........................................................................................Appendix A HydroCAD Report -Proposed......................................................................................Appendix B MIDSReport ................................................................................................................Appendix C Figures Existing Drainage Exhibit...............................................................................................Figure H-1 ProposedDrainage Exhibit............................................................................................Figure H-2 Stormwater Management Plan June 15, 2018 Control Concepts — Chanhassen Control Concepts Chanhassen, Minnesota Stormwater Management Plan Introduction This stormwater management plan was created for the Control Concepts project located at 8077 Century Boulevard in Chanhassen, Minnesota. The total site area encompasses 5.23 acres. The project generally consists of constructing a commercial building, parking areas, retaining wall, stormwater management systems, and associated utilities. Included in this plan are calculations for the total proposed discharge offsite of stormwater from the total site area. The stormwater from the site drains to public storm sewer located in the adjacent city street and a wetland located north of the site. Ultimately, all stormwater drains to an existing wetland located to the north of the site. Requirements and Methodology City of Chanhassen and Riley Purgatory Bluff Creek Watershed District (RPBCWD) Requirements 1. Rate Control — Limit peak runoff flow rates to that from existing conditions for the 2 - year, 10 -year, and 100 -year frequency events using a nested 24-hour rainfall distribution, and 100 -year frequency, 10 -day snowmelt event. 2. Volume Reduction — Provide for abstraction onsite of 1.1 inches of runoff from impervious surface of the parcel. 3. Water Quality— Sixty percent (60%) annual removal efficiency for total phosphorous and ninety percent (90%) annual removal efficiency for total suspended solids (TSS). Methodoloog The stormwater calculations were made utilizing the stormwater-modeling program HydroCAD 10.00. Calculations were performed for the 24-hour 100 -year rainfall event of 7.18 inches, 10 -year rainfall event of 4.20 inches and 2 -year rainfall event of 2.84 inches based on Atlas 14 data. The 10 -day snowmelt event of 7.20 inches was also analyzed. Soils information was found to be D soils, based on the geotechnical report provided by Braun Intertec dated March 13, 2018. For purposes of analyzing the 5.23 -acre project area, a drainage area of about 5.23 acres was included in the hydrologic analysis to account for all runoff that affects the proposed project. Stormwater Management Plan June 15, 2018 Control Concepts — Chanhassen Page 1 Conditions The existing site was previously mass graded for a building pad. The site is made up of green space consisting of native grasses. The existing site is broken up into two drainage areas. Drainage Area W drains directly to Century Boulevard. Drainage Area E sheet drains to an existing wetland located north of the site. Ultimately, all public storm sewer surrounding the site drains to the existing wetland located north of the site. Overall the existing project area being analyzed contains 0.1% impervious surface area. Conditions The proposed site consists of constructing a building, surface pavements, retaining wall, underground detention system, and utilities. A Contech Jellyfish JFPDO806 system is provided for treatment prior to discharging to city storm sewer. The proposed site contains 59% impervious surface area. The proposed project area is broken up into four drainage areas. Drainage area W drains directly to city storm sewer in Century Boulevard. Drainage area N sheet drains to an existing wetland located north of the site. Drainage area P and B drain directly into an underground detention system located on site. Water discharges the underground detention system to an outlet control structure consisting of a weir and two orifices. Water leaves the outlet control structure and passes through a Contech Jellyfish JFPDO806 treatment system prior to discharging into city storm sewer located in Century Boulevard. Rate Control The rate control requirements for the City of Chanhassen and Riley Purgatory Bluff Creek Watershed District are that peak rates shall not exceed existing rates for the 2, 10, and 100 - year events, and the 10 -day snowmelt event. Table 1.1 below compare the existing and proposed peak runoff rates and volumes for the discharge points analyzed. Table 1.1 — Peak Runoff Rates and Volumes to Century Boulevard 24 -HR Existing Peak Proposed Peak Runoff Rate and Runoff Rate and Storm Event Volume Volume 2 -yr (2.84") 0.15 cfs, 0.007 ac -ft 1.80 cfs, 0.654 ac -ft 10 -yr (4.20") 0.28 cfs, 0.014 ac -ft 4.58 cfs, 1.007 ac -ft 100 -yr (7.18") 0.58 cfs, 0.029 ac -ft 10.12 cfs, 1.791 ac -ft 10 -day Snowmelt 0.08 cfs, 0.041 ac -ft 2.28 cfs, 1.919 ac -ft (7.20") Stormwater Management Plan June 15, 2018 Control Concepts — Chanhassen Page 2 Table 1.2 - Peak Runoff Rates and Volumes to Wetland 24 -HR Storm Event Existing Peak Runoff Rate and Volume Proposed Peak Runoff Rate and Volume 2 -yr (2.84") 5.10 cfs, 0.487 ac -ft 2.87 cfs, 0.217 ac -ft 10 -yr (4.20") 10.17 cfs, 0.950 ac -ft 5.43 cfs, 0.405 ac -ft 100 -yr (7.18") 22.29 cfs, 2.091 ac -ft 11.44 cfs, 0.859ac-ft 10 -day Snowmelt (7.20") 6.11 cfs, 3.097 ac -ft 2.43 cfs, 1.219 ac -ft Table 1.3 - Peak Runoff Rates and Volumes to Total 24 -HR Storm Event Existing Peak Runoff Rate and Volume Proposed Peak Runoff Rate and Volume 2 -yr (2.84") 5.13 cfs, 0.494 ac -ft 4.64 cfs, 0.871 ac -ft 10 -yr (4.20") 10.23 cfs, 0.963 ac -ft 9.86 cis, 1.412 ac -ft 100 -yr (7.18") 22.41 cfs, 2.120 ac -ft 21.52 cfs, 2.651 ac -ft 10 -day Snowmelt (7.20") 6.18 cfs, 3.138 ac -ft 4.71 cfs, 3.139 ac -ft Volume Reduction Based on the City of Chanhassen and Riley Purgatory Bluff Creek Watershed District requirements, the proposed site shall provide for abstraction onsite of 1.1 inches of runoff from impervious surface of the parcel. Based on the geotechnical report provided by Braun Intertec dated March 13, 2018, soil infiltration rates are approximately 0.0006 inches/hour which are significantly lower than MPCA design infiltration rates for clay soils. Based on this report, infiltration is not feasible for this site. Water Quality Based on the City of Chanhassen and Riley Purgatory Bluff Creek Watershed District requirements, the proposed site shall remove 60% total phosphorous and 90% total suspended solids (TSS). Various options were considered to meet water quality requirements such as permeable pavement, green roofs, sand filters, and reuse. Table 2.1 shows a summary of TP and TSS removal efficiencies for these options based on the MPCA Stormwater Manual and compares them to the Contech's field test results for the Jellyfish JFPD0806: Stormwater Management Plan June 15, 2018 Control Concepts — Chanhassen Page 3 Table 2.1 — TP and TSS Removal Efficiencies Treatment System TP Removal Efficiency (°/,) TSS Removal Efficient (%) Permeable Pavement 55 74 Green Roof 0 85 Sand Filter w/ Iron Filings 77 85 Reuse 100 100 Contech Jellyfish JFPD0806 59 89 Though reuse was found to yield the most removal efficiency, it was found to be impractical for this site. The developable portion of the site only contains 10.6% lawn area that could be utilized for irrigation reuse. An area this small would not provide the volume reductions necessary to meet the TP and TSS removals above. The majority of the proposed building square footage will be utilized as a warehouse while only a small portion will consist of office space. Given the building use and minimal employees per SF, it was determined that the potential for grey water reuse would not provide the volume reductions necessary to meet the TP and TSS removals above. For these reasons, the Contech Jellyfish filter provides the most feasible option to reach the treatment goal of 60% TP removal and 90% TSS removal. To work towards the treatment goals, a Contech Jellyfish JFPDO806 system was provided. Based on information provided by Contech, the Jellyfish systems have been field tested to provide the following removal efficiencies if the design requirements are met: Table 2.1 — Contech Jellyfish Filter Field Performance Test Results Pollutant of Concern % Removal Total Trash 99% Total Suspended Solids (TSS) 89% Total Phosphorus (TP) 59% Total Nitrogen (TN) 51% Total Copper (TCu) >80% Total Zinc (TZn) >50% Turbidity (NTU) <15% In order for the Jellyfish systems to provide the water quality benefits listed above, the following design requirement must be met for the system: For the area draining to the system, runoff rates from the 1.25 -inch storm event shall be lower than the maximum allowable treatment flow rate. Details of the Jellyfish system provided are outlined below: (2) Contech Jellyfish JFPD0806 Treatment System Cartridge Depth = 40" Maximum allowable treatment flow rate = 1.47 cfs Stormwater Management Plan June 15, 2018 Control Concepts - Chanhassen Page 4 A breakdown of the flow characteristics compared to the design constraints for the drainage areas being routed to the system is outlined below: Table 3.1 — Peak Runoff Rates to Jellyfish Treatment System - Treatment Drainage Area Treatment System 1.25 -inch 24 -HR Max. Allowable acre -ft Routing Storm Event Treatment Flow Rate P+B Jellyfish JFPDO806 1.12 cfs 1.47 cfs As shown in the table above, the design parameters for the maximum allowable treatment flow rate have been met for the Jellyfish system selected. MIDS modeling was used to determine total suspended solids and total phosphorus removal within the site utilizing the Jellyfish field performance test results. Impervious area from the city requested bituminous path on the north and east sides of the site were omitted from the MIDS model. The load reductions obtained from the proposed Jellyfish treatment systems area shown below: Summary Information Performance Goal Requirement Performance goal volume retention requirement: 11408 ft3 Volume removed by BMPs towards performance goal: ft3 Percent volume removed towards performance goal % Annual Volume and Pollutant Load Reductions Post development annual runoff volume 6.4491 acre -ft Annual runoff volume removed by BMPs: 0 acre -ft Percent annual runoff volume removed: 0 % Post development annual particulate P load: 2.894 Ibs Annual particulate P removed by BMPs: 1.647 lbs Post development annual dissolved P load: 2.368 lbs Annual dissolved P removed by BMPs: 1.347 Ilas Percent annual total phosphorus removed: 57 % Post development annual TSS load: Annual TSS removed by BMPs: Percent annual TSS removed: Best Management Practices 956 lbs 820.6 lbs 86 % Best management practices (BMP's) will be implemented during construction per the project Stormwater Pollution Prevention Plan (C3-2, C3-3). During construction, erosion control measures will include dust control, silt fence, inlet protection, erosion control blankets, and temporary rock construction entrances. Permanent BMP's will include stormwater management systems, surface pavements, and turf establishment (vegetation) of disturbed areas. Stormwater Management Plan June 15, 2018 Control Concepts — Chanhassen Page 5 Conclusion The proposed Stormwater Management Plan for the Control Concepts project provides an improved solution for the conveyance of stormwater on this site. The underground detention system will capture runoff onsite while the Contech Jellyfish treatment system will provide additional water quality on the site. Stormwater Management Plan June 15, 2018 Control Concepts — Chanhassen Page 6 Appendix A HydroCAD Report, Existing 3R Total :2R] Wetland 1R � E W Century Blvd —n �Subcat; Reach on �i "I Existing HydroCAD - 17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 ©: Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 5.223 80 >75% Grass cover, Good, HSG D (E, W) 0.007 98 Paved parking, HSG D (E, W) 5.230 80 TOTAL AREA Printed 6/15/2018 Existing HydroCAD -17516 Prepared by Loucks Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 5.230 HSG D E, W 0.000 Other 5.230 TOTAL AREA Printed 6/15/2018 Existing HydroCAD -17516 Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 5.223 0.000 5.223 >75% Grass cover, Good E, W 0.000 0.000 0.000 0.007 0.000 0.007 Paved parking E, W 0.000 0.000 0.000 5.230 0.000 5.230 TOTAL AREA Existing HydroCAD - 17516 MSE 24-hr3 2-YearRainfall=2.84" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 5 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E: Runoff Area=5.161 ac 0.02% Impervious Runoff Depth=1.13" Flow Length=494' Tc=30.1 min CN=80/98 Runoff=5.10 cfs 0.487 of Subcatchment W: Runoff Area=0.069 ac 8.70% Impervious Runoff Depth=1.26" Tc=7.0 min CN=80/98 Runoff=0.15 cfs 0.007 of Reach 1R: Century Blvd Inflow=0.15 cfs 0.007 of Outflow=0.15 cfs 0.007 of Reach 2R: Wetland Inflow=5.10 cfs 0.487 of Outflow=5.10 cfs 0.487 of Reach 3R: Total Inflow=5.13 cfs 0.494 of Outflow=5.13 cfs 0.494 of Total Runoff Area= 5.230 ac Runoff Volume= 0.494 of Average Runoff Depth= 1.13" 99.87% Pervious= 5.223 ac 0.13% Impervious= 0.007 ac Existing HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 MSE 24 -hr 3 2 -Year Rainfall=2.84" Printed 6/15/2018 Summary for Subcatchment E: Runoff = 5.10 cfs @ 12.44 hrs, Volume= 0.487 af, Depth= 1.13" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 2 -Year Rainfall=2.84" Area (ac) CN Description 0.001 98 Paved parking, HSG D N 5.161 80 Weighted Average 5.160 80 99.98% Pervious Area 0.001 98 0.02% Impervious Area Tc Length Slope Velocity Capacity Description 29.5 300 0.0330 0.17 Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" 0.6 194 0.1190 5.17 Shallow Concentrated Flow, Grassed Waterwav Kv= 15.0 fos 30.1 494 Total 1 5.10 cfs --------------------------------------------- MSE ------------------------------------------- MSE 24 -hr 3 2 -Year Rainfall=2.84" Runoff Area=5.161 ac Runoff Volume=0.487 of ------------------------------------ - Runoff Depth=1.13" Flow Length=494' Tc=3VA min- CN=80/98 3 0 LL Subcatchment E: Hydrograph 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 Time (hours) ■ Runoff Existing HydroCAD -17516 MSE 24 -hr 3 2 -Year Rainfall=2.84" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment W: Runoff = 0.15 cfs @ 12.15 hrs, Volume= 0.007 af, Depth= 1.26" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 2 -Year Rainfall=2.84" Area (ac) CN Description 0.006 98 Paved parking, HSG D 0.063 80 >75% Grass cover, Good, HSG D 0.069 82 Weighted Average 0.063 80 91.30% Pervious Area 0.006 98 8.70% Impervious Area Tc Length Slope Velocity Capacity Description 7.0 Direct Entry, Subcatchment W: - 0.16 0.15 ------------------------------------------------------------------ 0.15 cfs ---------------- 0.14 ______________________________________________ q _ g _ -- -- L----�J 0.19 ........ ---------------------------2-Y-ear_RWnfall=2.$4"-- 012 -------- ---------------------------- Runoff-Area=0:469ac- - 0.+ ' -------- --------------------- KdrnoffVokirhibi-4:0-07-af- 0.09 ' ------------------------------ ------- Runoff- Depth --1,26"-- 3 0.08 u. 0.07 T�=fi.O -m In- 0.06 • CN_=_89J28_ 0.05 _ _ _ 0.04 0.03 0.02 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 Time (hours) ■ Runof( Existing HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 (c� MSE 24 -hr 3 2 -Year Rainfall=2.84" Printed 6/15/2018 Summary for Reach 1 R: Century Blvd [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.069 ac, 8.70% Impervious, Inflow Depth = 1.26" for 2 -Year event Inflow = 0.15 cfs @ 12.15 hrs, Volume= 0.007 of Outflow = 0.15 cfs @ 12.15 hrs, Volume= 0.007 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd Hydrograph . __ ___ ______________________________ o.1s ,'; _ _ 0.15 cfs _ _ 0.15 -------------------- Inflow-area=0.069-ac - 0.1a ----------------------------------------------------- 0.13 - --------------------------------------------------- 0.12 0.11 .' " ______ _____________________________ ________________________ 0.1 ___________________________________________________________ � 0.09 3 0.08 __________________________ __________________ 0 u_ 0,07- 0.0s 0.04:-- - -- --------- - - -- —--- -- - - - - -- 0.03 ,' ____________________ 0.02 ____________________________________________________ 0.01 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 64 56 58 60 62 64 66 68 70 72 Time (hours) ■ Inflow ■ Outflow Existing HydroCAD - 17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 @2017 MSE 24 -hr 3 2 -Year Rainfall=2.84" Printed 6/15/2018 Summary for Reach 2R: Wetland [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.161 ac, 0.02% Impervious, Inflow Depth = 1.13" for 2 -Year event Inflow = 5.10 cfs @ 12.44 hrs, Volume= 0.487 of Outflow = 5.10 cfs @ 12.44 hrs, Volume= 0.487 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph Time (hours) e Inflow ■ ouHlow Existing HydroCAD -17516 MSE 24 -hr 3 2 -Year Rainfall=2.84" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 10 Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.230 ac, 0.13% Impervious, Inflow Depth = 1.13" for 2 -Year event Inflow = 5.13 cfs @ 12.44 hrs, Volume= 0.494 of Outflow = 5.13 cfs @ 12.44 hrs, Volume= 0.494 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 3R: Total Hydrograph Time (hours) FM-1n—f1­.---j ■ Outflow Existing HydroCAD - 17516 MSE 24 -hr 3 10 -Year Rainfall=4.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Paae 11 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentE: Runoff Area=5.161 ac 0.02% Impervious RunoffDepth=2.21" Flow Length=494' Tc=30.1 min CN=80/98 Runoff=10.17 cfs 0.950 of Subcatchment W: Runoff Area=0.069 ac 8.70% Impervious Runoff Depth=2.36" Tc=7.0 min CN=80/98 Runoff=0.28 cfs 0.014 of Reach 1R: Century Blvd Inflow=0.28 cfs 0.014 of Outflow=0.28 cfs 0.014 of Reach 211: Wetland Inflow=10.17 cfs 0.950 of Outflow=10.17 cfs 0.950 of Reach 3R: Total Inflow=10.23 cfs 0.963 of Outflow=10.23 cfs 0.963 of Total Runoff Area= 5.230 ac Runoff Volume= 0.963 of Average Runoff Depth =2.21" 99.87% Pervious =5.223 ac 0.13% Impervious = 0.007 ac Existing HydroCAD -17516 Prepared by Loucks MSE 24 -hr 3 10 -Year Rainfall=4.20" Printed 6/15/2018 Summary for Subcatchment E: Runoff = 10.17 cfs @ 12.43 hrs, Volume= 0.950 af, Depth= 2.21" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 10 -Year Rainfall=4.20" Area (ac) CN Description 0.001 98 Paved parking, HSG D 5.160 80 >75% Grass cover. Good. HSG D 5.161 80 Weighted Average 5.160 80 99.98% Pervious Area 0.001 98 0.02% Impervious Area Tc Length Slope Velocity Capacity Description 29.5 300 0.0330 0.17 Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" 0.6 194 0.1190 5.17 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 30.1 494 Total Subcatchment E: 1 10.17 cfs I -------------------------------------- 10 MSE 24 -hr 3 --------- -------------------------------------------------------- 9 10 -Year Rainfall=4.20" --------- -------------------------------------------------------- Runoff ------------------------------------------- --- 6 Runoff Area=5.161 ac -------- ------------------------------------------- ------ 7 " Runoff Volume=0.950 of --------- -------------------------------- -2-.-2- 6 " Runoff Depth=1- ---------" ----- LL 6 . flow Length=494' ----------------------------- -•-- 4 " Tc=3Q.-1-min 3 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 6'6..6'8 .. '7072 ..,...,27072 Time (hours) ■Runoff Existing HydroCAD - 17516 MSE 24 -hr 3 10 -Year Rainfall=4.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment W: Runoff = 0.28 cfs @ 12.14 hrs, Volume= 0.014 af, Depth= 2.36" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 10 -Year Rainfall=4.20" Area (ac) CN Description 0.006 ------------------------------------- ----------------------- ------ ------------------------------------------ -- --- 0.28 cfs 98 Paved parking, HSG D 0.063 1U --Year Real falf=4:70" -------- ------------------------------------------------------- 80 >75% Grass cover, Good, HSG D 0.069 -------- -------------------------Runoff Volun e= 041-4-a# 82 Weighted Average 0.063 --------------------------------------------------_-------- - ----------------------------------------- Tc=7_,0_min_ 80 91.30% Pervious Area 0.006 -------- ------------------------------------------------------- 98 8.70% Impervious Area Tc Length Slope Velocity Capacity Description 7.0 Direct Entry, Subcatchment W: 0.3 ------------------------------------- ----------------------- ------ ------------------------------------------ -- --- 0.28 cfs 0.28 -- - - - -----------------------------------------MSE-24-hr l 0.26 0.24 ' 1U --Year Real falf=4:70" -------- ------------------------------------------------------- 0.22 RunoffA_ r_ea=0 Il69 ac_ -------- --------------------------- 0.2 -------- -------------------------Runoff Volun e= 041-4-a# � 0.18 0.16 ________ Runoff Depti_ 7 36" LL 0.14 ' --------------------------------------------------_-------- - ----------------------------------------- Tc=7_,0_min_ 0.12-------- ------------------------------------------ 4CN=80F98- 0.1 -------- ------------------------------------------------------- 0.08 ' ________ _________ __-__________--____________ 0.06 ____________________________________________ 0.04 _________ 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) ■Runoff Existing HydroCAD - 17516 MSE 24 -hr 3 10 -Year Rainfall=4.20" Prepared by Loucks Printed 6/15/2018 HydroCADO 10.00-20 s/n 02676 © 2017 HydroCAD Software Solutions LLC Page 14 Summary for Reach 1 R: Century Blvd [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.069 ac, 8.70% Impervious, Inflow Depth = 2.36" for 10 -Year event Inflow = 0.28 cfs @ 12.14 hrs, Volume= 0.014 of Outflow = 0.28 cfs @ 12.14 hrs, Volume= 0.014 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd Hydrograph -------------- — ----- — — --------- — ---------------------- — ---- ■Inflow 0.3 0.28 ■ Outflow __ 10.28 cfs _____________inflow-Area-0069ac- ___________________________________________________________ 0.26 ______ 0.24 _____________________________________________________ 0.22 ________________ 0.2 ------ _____________________________________________________ 0.18 ______ ____________________ — � _________________________ = 0.16 3 ______ ° 0.14 _____________________________________________________ LL 0.12 0.1 0.66 ___________________________________________________________ 0.06- 0.041 _____________________ 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 Time (hours) Existing HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 ©: MSE 24 -hr 3 10 -Year Rainfall=4.20" Printed 6/15/2018 .LLC Page 15 Summary for Reach 2R: Wetland [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.161 ac, 0.02% Impervious, Inflow Depth = 2.21" for 10 -Year event Inflow = 10.17 cfs @ 12.43 hrs, Volume= 0.950 of Outflow = 10.17 cfs @ 12.43 hrs, Volume= 0.950 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph - ------------------------------- — - ________ ■Inflow 10.17 cfS ■ Outflow ,o _________________ Inflow Area=5.161 ac 9 ------------ ----- ---------------------- g_______------------------------------------------------ 7 ______________________________________________________________ .0 g ___________________________________________________ 3 LL6 _______ ------------------------------------------------------ 4 ______ ------------------------------------------------------ 3 _____________________________________________________________ 2 - ______ ----------------------------------------------------- 22 24 26 28 30 32 34 36 38 41 Time (hours) Existing HydroCAD -17516 MSE 24 -hr 3 10 -Year Rainfall=4.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 16 Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.230 ac, 0.13% Impervious, Inflow Depth = 2.21" for 10 -Year event Inflow = 10.23 cfs @ 12.43 hrs, Volume= 0.963 of Outflow = 10.23 cfs @ 12.43 hrs, Volume= 0.963 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 3R: Total Hydrograph ------ Fs—in—fl.—w-1 10.23 cfs ---------------------------------------------------- 10 Outflow ------------------------ Inflow_Area=5.230 ac ___________________________________--_____---__ W ---------------------------------------------------- i O - ----------------------------------------------------- 8 _ -_ --_ __ ---_____- 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 Time (hours) Existing HydroCAD - 17516 MSE 24 -hr 3 100 -Year Rainfall=7.18" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 © 2017 HydroCAD Software Solutions LLC Page 17 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentE: Runoff Area=5.161 ac 0.02% Impervious Runoff Depth=4.86" Flow Length=494' Tc=30.1 min CN=80/98 Runoff=22.29 cfs 2.091 of Subcatchment W: Runoff Area=0.069 ac 8.70% Impervious Runoff Depth=5.04" Tc=7.0 min CN=80/98 Runoff=0.58 cfs 0.029 of Reach 1R: Century Blvd Inflow=0.58 cfs 0.029 of Outflow=0.58 cfs 0.029 of Reach 2R: Wetland Inflow=22.29 cfs 2.091 of Outflow=22.29 cfs 2.091 of Reach 3R: Total Inflow=22.41 cfs 2.120 of Outflow=22.41 cfs 2.120 of Total Runoff Area = 5.230 ac Runoff Volume = 2.120 of Average Runoff Depth = 4.86" 99.87% Pervious = 5.223 ac 0.13% Impervious = 0.007 ac Existing HydroCAD -17516 Prepared by Loucks HydroCAD®10.00-20 s/n 02676 © 2017 MSE 24 -hr 3 100 -Year Rainfall=7.18" Printed 6/15/2018 Summary for Subcatchment E: Runoff = 22.29 cfs @ 12.42 hrs, Volume= 2.091 af, Depth= 4.86" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 100 -Year Rainfall=7.18" Area (ac) CN Description 0.001 98 Paved parking, HSG D 5.160 80 >75% Grass cover, Good, HSG D 5.161 80 Weighted Average 5.160 80 99.98% Pervious Area 0.001 98 0.02% Impervious Area Tc Length Slope Mn) (feet) (ft/ft) 29.5 300 0.0330 Velocity Capacity Description 0.17 0.6 194 0.1190 5.17 30.1 494 Total Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" Shallow Concentrated Flow. Subcatchment E: Hydrograph ------------ — — - —----------------------------------- — ---- 22.29 cfs---------------------- ------------------------------ ---------- --------------------------------MS-E-24=hr a- ------------------------------------------------------- --------- ------------------------ _-farRaittfal---------- ------------------------------------- Runoff AeewmS,461i _ -------- -----------------------------------Runoff-Y_oKMWn 2:091 -at- -------- - ------------------------------------Rdhd f dep�fi=x.86' --------- -------------------------------- --------------------------------------- f low Lerigih=d94' - --------- -------------------------------------------------------- --------- -------------------------------------- 1'c=30:1-mim- --------- ------------------------------------------------------ ---------------------------------------------------C-4.80/9&---------------------------------------------------------------- - 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 Time (hours) Existing HydroCAD - 17516 MSE 24 -hr 3 100 -Year Rainfall=7.18" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 19 Summary for Subcatchment W: Runoff = 0.58 cfs @ 12.14 hrs, Volume= 0.029 af, Depth= 5.04" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 100 -Year Rainfall=7.18" Area (ac) CN Description 0.006 98 Paved parking, HSG D 0.063 80 >75% Grass cover, Good, HSG D 0.069 82 Weighted Average 0.063 80 91.30% Pervious Area 0.006 98 8.70% Impervious Area Tc Length Slope Velocity Capacity Description 7.0 Direct Entry, Subcatchment W: 0.6 ________________________________________________________ 0.58 cfs 0.55 ' --------- --------------------------------------- -24 ihr3 0.5 --------------------------M-Year RaifffalC=T.'1 V 0.45 ' -------- ---------------------------------- Runoff Area=0.069 ac 0.4 ' -------- ------------------------------------------------------- Runoff Volume=0.029 of -- 0.35 -------- ------------------------------------------------------- Depth=5.04"- LL 0.3 ' - ------------------------------Runoff -------- --------------------------------- -------_T&=7_ Amin_ 0.25-.CN=801-9& ' p/��np ___________________________________________ 0.2 ________ 0.15 __________________________-------- ________ 0.1 _______________________________________________________ 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 Time (hours) ■Runoff Existing HydroCAD - 17516 MSE 24 -hr 3 100 -Year Rainfall= 7.18" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @ 2017 HydroCAD Software Solutions LLC Page 20 Summary for Reach 1 R: Century Blvd [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.069 ac, 8.70% Impervious, Inflow Depth = 5.04" for 100 -Year event Inflow = 0.58 cfs @ 12.14 hrs, Volume= 0.029 of Outflow = 0.58 cfs @ 12.14 hrs, Volume= 0.029 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd ____ _________ ■Inflow ______________________________ 0.6 --10.5 cfs---------------------- lriftbw-Are"=Q:06Jae- .gumow 0.55 �' - - - - -- -------------------- 0.6 ------ ----------------------------------------------------- 0.45 ______ 0.4 ______ ___________________ _____________________ w u 0.35 ______ _______ __________ 0 0.3 ______ _ ______________ LL 0.25 0.2 0.16 0.1 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 4( Time (hours) Existing HydroCAD - 17516 MSE 24 -hr 3 100 -Year Rainfall= 7.18" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 21 Summary for Reach 2R: Wetland [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.161 ac, 0.02% Impervious, Inflow Depth = 4.86" for 100 -Year event Inflow = 22.29 cfs @ 12.42 hrs, Volume= 2.091 of Outflow = 22.29 cfs @ 12.42 hrs, Volume= 2.091 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph -------------------------------------------------------------------------------___________ ------ ■Inflow _______ ------ _____________ ■ out6ow 24 23 -- 22.29 CfS_________________,_______j�_______/�_____________________ ____._________________n11OW_----_-_—a----- C__ - - 21 _______ ____________________________________ 20 ___________________________________------------------------- __ 19 ______________________________________________________________ 18 ____________________________________________________________ 17 _______ __________________----------------------------- 16 ______-----------------------------------------________ 15 ______________________________________________________________ w14 ---- ------- _______________________________________________________ u 13 _________----_---------------------------------------------- 3 12 �.' _____________________________________________________________ u11 _______--- __--- ____________-------------------------__ 10 ____________________________________________________________ 9 ______ ___________________ _________________________ 6 ________--- _---------------------------------------- 7 ____________------------------------------ 6 ______________________________--------------- 5 ______ __________ _ _____________________ 4 _________________________________________________________ 3 __________________________________________________ 2 14 16 18 20 22 24 26 28 30 32 34 36 38 4( Time (hours) Existing HydroCAD - 17516 Prepared by Loucks MSE 24 -hr 3 100 -Year Rainfall=7.18" Printed 6/15/2018 Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.230 ac, 0.13% Impervious, Inflow Depth = 4.86" for 100 -Year event Inflow = 22.41 cfs @ 12.42 hrs, Volume= 2.120 of Outflow = 22.41 cfs @ 12.42 hrs, Volume= 2.120 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs 21 20 19 18 17 16 15 14 13 e 12 LL 11 Reach 3R: Total /,' ------------------------------------------------------------------ I ____________________________________________________ ■Inflow ---------------------------------------- —------- ■ Outflow -----------------------h,fiQWAMa=---30ac-- ',---------------------------------------------------- ----------------------------------------------------------------------------------------------------------- - 0 2 20 22 24 Time (hours) 4446 48 68 70 72 3R Total 2 R Wetland E W Century Blvd OSubcat/Po�n, Link! Routing Diagram for Existing HydroCAD -17516 (Snowmelt) Prepared by Loucks, Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 © 2017 HydroCAD Software Solutions LLC Existing HydroCAD -17516 (Snowmelt) Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Pane 9 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 5.223 100 >75% Grass cover, Good, HSG D (E, W) 0.007 100 Paved parking, HSG D (E, W) 5.230 100 TOTAL AREA HydroCAD -17516 (Snowmelt) by Loucks Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 5.230 HSG D E, W 0.000 Other 5.230 TOTAL AREA Printed 6/15/2018 Existing HydroCAD - 17516 (Snowmelt) Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 5.223 0.000 5.223 >75% Grass cover, Good E, W 0.000 0.000 0.000 0.007 0.000 0.007 Paved parking E, W 0.000 0.000 0.000 5.230 0.000 5.230 TOTAL AREA Existing HydroCAD - 17516 (Snow MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 5 Time span=0.00-300.00 hrs, dt=0.05 hrs, 6001 points Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentE: Runoff Area=5.161 ac 100.00% Impervious Runoff Depth=7.20" Flow Length=494' Tc=30.1 min CN=0/100 Runoff=6.11 cfs 3.097 of Subcatchment W: Runoff Area=0.069 ac 100.00% Impervious Runoff Depth=7.20" Tc=7.0 min CN=0/100 Runoff=0.08 cfs 0.041 of Reach 1R: Century Blvd Inflow=0.08 cfs 0.041 of Outflow=0.08 cfs 0.041 of Reach 2R: Wetland Inflow=6.11 cfs 3.097 of Outflow=6.11 cfs 3.097 of Reach 3R: Total Inflow=6.18 cfs 3.138 of Outflow=6.18 cfs 3.138 of Total Runoff Area = 5.230 ac Runoff Volume = 3.138 of Average Runoff Depth = 7.20" 0.00% Pervious= 0.000 ac 100.00% Impervious =5.230 ac Existing HydroCAD - 17516 (Snow MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Paoe 6 Summary for Subcatchment E: Runoff = 6.11 cfs @ 121.06 hrs, Volume= 3.097 af, Depth= 7.20" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-300.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Area (ac) CN Description * 0.001 100 Paved parking, HSG D * 5.160 100 >75% Grass cover, Good, HSG D 5.161 100 Weighted Average 5.161 100 100.00% Impervious Area Tc Length Slope Velocity Capacity Description 29.5 300 0.0330 0.17 Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" 0.6 194 0.1190 5.17 Shallow Concentrated Flow, Grassed Waterwav Kv= 15.0 fps 30.1 494 Total Subcatchment E: ■Runoff j------------------------------------- MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" ---- RuriofFArea -smf we Runoff Volume=3.097 of ------------------- Runoff -Depth=7.20" Flow Length=494' --------------------------- TCZ30- m9n CN=0/100 40 60 80 100 120 140 160 180 200 220 240 260 280 Time (hours) ------------------------ ------------------------------ ------------------------ 3 31 j------------------------------------- MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" ---- RuriofFArea -smf we Runoff Volume=3.097 of ------------------- Runoff -Depth=7.20" Flow Length=494' --------------------------- TCZ30- m9n CN=0/100 40 60 80 100 120 140 160 180 200 220 240 260 280 Time (hours) Existing HydroCAD - 17516 (Snow MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment W: Runoff = 0.08 cfs @ 120.64 hrs, Volume= 0.041 af, Depth= 7.20" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-300.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Area (ac) CN Description ' 0.006 100 Paved parking, HSG D 0.063 100 >75% Grass cover, Good HSG D 0.069 100 Weighted Average 0.069 100 100.00% Impervious Area Tc Length Capacity Description 7.0 Direct Entry, Subcatchment W: Hydrograph ---------------------- ■ Rl 0.085 I ____________________ 0.08 0.075 ' 0.070.065 0.06 --------- 0.055 ____________________0.05c 0.045 _______________u 0.04 '0.035 ____________________0.03 0.025 ____________________0.02 '0.015 ____________________ 0.01 ' 0 20 ---------------USE-24 hr 3-24Q.11-hii§- --------------------------------------- 10-day snowmelt Rainfall=7,20" _ ------------------ Runoff_AreaaO 069_ac_ ----------------Runoff-Volume=0.44 af- --------------------Runoff-Depth=i.20"- __________________ -------T. - min- ----------------------------- CN=0%100_ _______________________________________ --------------------------------------- _______________________________________ --------------------------------------- _______________________________________ 140 160 180 Time (hours) Existing HydroCAD - 17516 (Snow MSE 24 -hr 3 240.00 hrs 10 -day snowme/t Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 8 Summary for Reach 1 R: Century Blvd [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 0.069 ac,100.00% Impervious, Inflow Depth = 7.20" for 10 -day snowmelt event Inflow = 0.08 cfs @ 120.64 hrs, Volume= 0.041 of Outflow = 0.08 cfs @ 120.64 hrs, Volume= 0.041 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-300.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd _________ _______________________________________________________ ■Inflow 0.08 cfs ________ ■ Outflow -----------------------------Cnf1Qw=Alre�a_=_O.II6�_ac__ -------------- 0.02 .� r 0.015 0.01 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Time (hours) Existing HydroCAD - 17516 (Snow MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 © 2017 HydroCAD Software Solutions LLC Page 9 Summary for Reach 2R: Wetland [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.161 ac,100.00% Impervious, Inflow Depth= 7.20" for 10 -day snowmelt event Inflow = 6.11 cfs @ 121.06 hrs, Volume= 3.097 of Outflow = 6.11 cfs @ 121.06 hrs, Volume= 3.097 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-300.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph Time (hours) Fio—in—ftmli ■ Outflow Existing HydroCAD - 17516 (Snow MSE 24 -hr 3 240.00 hrs 10 -day snowme/t Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 10 Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.230 ac,100.00% Impervious, Inflow Depth = 7.20" for 10 -day snowmelt event Inflow = 6.18 cis @ 121.04 hrs, Volume= 3.138 of Outflow = 6.18 cfs @ 121.04 hrs, Volume= 3.138 af, Men= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-300.00 hrs, dt= 0.05 hrs Reach 3R: Total Hydrograph Time (hours) ■ Inflow ■ Outflow Appendix B HydroCAD Report, Proposed F3R Total 1R Century Blvd 2R Wetland LJG O UG Detention OB Sub4 Reach Aon Ljn k Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 2017 Area Listing (all nodes) Area CN Description (acres) (su bcatchment-nu mbers) 2.163 80 >75% Grass cover, Good, HSG D (N, P, W) 3.068 98 Paved parking, HSG D (B, N, P, W) 5.231 91 TOTAL AREA Printed 6/15/2018 Proposed HydroCAD -17516 Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 02017 HydroCAD Software Solutions LLC Paae 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 5.231 HSG D B, N, P, W 0.000 Other 5.231 TOTAL AREA Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 20 Ground Covers (all nodes) Printed 6/15/2018 0--- A HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 2.163 0.000 2.163 >75% Grass cover, Good N, P, W 0.000 0.000 0.000 3.068 0.000 3.068 Paved parking B, N, P, W 0.000 0.000 0.000 5.231 0.000 5.231 TOTAL AREA Proposed HydroCAD -17516 Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 5 Pipe Listing (all nodes) Line# Node Number In -Invert (feet) Out -Invert (feet) Length (feet) Slope (ft/ft) n Diam/Width (inches) Height (inches) Inside -Fill (inches) 1 UG 960.63 959.59 104.0 0.0100 0.013 18.0 0.0 0.0 Proposed HydroCAD - 17516 MSE 24 -hr 3 1.25" Event Rainfall=1.25" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 6 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentB: Runoff Area=1.127 ac 100.00% Impervious Runoff Depth=1.03" Tc=7.0 min CN=0/98 Runoff=1.86 cfs 0.097 of SubcatchmentN: Runoff Area=2.032 ac 10.33% Impervious Runoff Depth=0.26" Flow Length=345' Tc=19.1 min CN=80/98 Runoff=0.47 cfs 0.044 of SubcatchmentP: Runoff Area=2.042 ac 84.72% Impervious Runoff Depth=0.90" Tc=7.0 min CN=80/98 Runoff=2.92 cfs 0.154 of Subcatchment W: Runoff Area=0.030 ac 3.33% Impervious Runoff Depth=0.20" Tc=7.0 min CN=80/98 Runoff=0.01 cfs 0.001 of Reach 1R: Century Blvd Inflow=1.13 cfs 0.251 of Outflow --1.13 cfs 0.251 of Reach 2R: Wetland Inflow=0.47 cfs 0.044 of Outflow=0.47 cfs 0.044 of Reach 3R: Total Inflow=1.59 cfs 0.296 of Outflow=1.59 cfs 0.296 of Pond UG: UG Detention Peak Elev=961.76' Storage=0.093 of Inflow=4.78 cfs 0.251 of Outflow=1.12 cfs 0.251 of Total Runoff Area = 5.231 ac Runoff Volume = 0.296 of Average Runoff Depth = 0.68" 41.35% Pervious = 2.163 ac 58.65% Impervious = 3.068 ac Proposed HydroCAD -17516 Prepared by Loucks HvdroCAD@ 10.00-20 s/n 02676 n 20 MSE 24 -hr 3 1.25" Event Rainfall=1.25" Printed 6/15/2018 Summary for Subcatchment B: Runoff = 1.86 cfs @ 12.14 hrs, Volume= 0.097 af, Depth= 1.03" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 1.25' Event Rainfall=1.25' Area (ac) CN Description 1.127 98 Paved parking HSG D 1.127 98 100.00% Impervious Area Tc Length Slope Velocity Capacity Description 7.0 Direct Entry, Subcatchment B: Hydrograph ------- ——- ----------- - - - - - - - - - - - - - - MSE 24 -hr 3 1.25" Event Rainfall=1.25" Runoff Area=1.127 ac Runoff Volume=0.097 of --------------------------------- _ _ _ Runoff Depth= -I-.03"- Tc=7.0 min LL CN=0/98 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 Time (hours) ■Runoff Proposed HydroCAD - 17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 @ 20 MSE 24 -hr 3 1.25" Event Rainfall=1.25" Printed 6/15/2018 Summary for Subcatchment N: Runoff = 0.47 cfs @ 12.32 hrs, Volume= 0.044 af, Depth= 0.26" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 1.25" Event Rainfall=1.25" Area (ac) CN Description 0.210 98 Paved parking, HSG D 1.822 80 >75% Grass cover, Good, HSG D 2.032 82 Weighted Average 1.822 80 89.67% Pervious Area 0.210 98 10.33% Impervious Area Tc Length Slope Velocity Capacity Description 18.9 300 0.1008 0.26 Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" 0.2 45 0.0667 3.87 Shallow Concentrated Flow, Grassed Waterwav Kv= 15.0 fos 19.1 345 Total Subcatchment N: Hydrograph 0.52__________________________________________________________________ 0.5 --- 0.47 cfs-------------------------------------------------- 0.48 ---- ---------------------------------------------------- 0.46 - - - - - - ------------------------------------------- MSE-24hr- 3 0.44 -------- ------------------------------------------------------- 0.42 - - - - - - - - -------------------------435" Event -RaiftfaH=1.-25"- 0.4 --------- ------------------------------------------------------- 0.38 ------------------------------------ Runoff Area=2- 32 -ac 0.36_________ 0.34 --------------------------------- Rtmoff Volume--O.O"af 0.32 ____________________________________________________ n 0.3 _ _________---- .--------------------------- is � 0.28 --- - - - - -- Runoff Depth --0.26c 3 0.26 -------- ----------------- LL ---- -- - ow=ength=3�s` _ 0.22 _ ii in 0.2 ____-____._________________________:________________ _ __.__!fl_ 0.18; - - - - - - ------------------------- - - - - -- CN=$019$ 0.16 -------- ------------------------------------------------ 0.12 ----------------------------------------------- - 0.1 -------- ------------------------------------------------------ 0.08 '. _______________________________________________.______________ 0.06 _____________________________________________________________ 0.04 ________ _ 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 Time (hours) ■ Runoff Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 20 MSE 24 -hr 3 1.25" Event Rainfall=1.25" Printed 6/15/2018 Summary for Subcatchment P: Runoff = 2.92 cfs @ 12.14 hrs, Volume= 0.154 af, Depth= 0.90" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 1.25" Event Rainfall=1.25' Area (ac) CN Description 1.730 98 Paved parking, HSG D 2.042 95 Weighted Average 0.312 80 15.28% Pervious Area 1.730 98 84.72% Impervious Area Tc Length M Capacity Description 7.0 Direct Entry, Subcatchment P: Hydrograph ---- 2.9fc1s ------------------------ 3MSE 24 -hr 3 1.25" Event Rainfall=1.25" Runoff Area=2.042 ac z '---------------------- -Runoff Volurne=OA54 of Runoff Depth=0.90" Tc=7.0 min LL CN=80/98 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 M 60 62 64 66 68 70 72 Time (hours) ■ Runoff Proposed HydroCAD -17516 Prepared by Loucks HydroCAD@ 10.00-20 s/n 02676 @ 2017 MSE 24 -hr 3 1.25" Event Rainfall=1.25" Printed 6/15/2018 Summary for Subcatchment W: Runoff = 0.01 cfs @ 12.16 hrs, Volume= 0.001 af, Depth= 0.20" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 1.25" Event Rainfall=1.25" Area (ac) CN Description 0.001 98 Paved parking, HSG D 0.029 80 >75% Grass cover, Good, HSG D 0.030 81 Weighted Average 0.029 80 96.67% Pervious Area 0.001 98 3.33% Impervious Area Tc Length Slope Description 7.0 Direct Entry, Subcatchment W: 0.009 --------- ___ ______ __________________________ 0.01 cfs 0.008 ---__--- ARSE-24-hF3- 00D7 ' - - - - - - - -' ------------------------ 1:25"Event-Ratnfalt=1:25"- 0.007 -------------------------- - ------------------- 0.006 ' - -- ------------------------------------- Runoff.Area=Il.030_ac._ 0.006 ' -------- -------------------------- -Runoff-Volume=0:004af- 0.00 5 ________ --------------------------------____________-___________ 0.005 0.004 - ----------------------------------------- Tt=7.0Imn- LL 0.004 ' 0.003 C1V-80798 0.003 0.002 0.002 _______________________________________________________________ 0.001 ' 0.001 0.000 ' 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) ■Runoff Proposed HydroCAD - 17516 MSE 24 -hr 3 1.25" Event Rainfall=1.25" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 11 Summary for Reach 1 R: Century Blvd [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 3.199 ac, 89.34% Impervious, Inflow Depth = 0.94" for 1.25' Event event Inflow = 1.13 cfs @ 12.39 hrs, Volume= 0.251 of Outflow = 1.13 cfs @ 12.39 hrs, Volume= 0.251 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd Hydrograph Time (hours) ■ Inflow ■ Outflow Proposed HydroCAD -17516 Prepared by Loucks MSE 24 -hr 3 1.25" Event Rainfall=1.25" Printed 6/15/2018 tions LLC Page 12 Summary for Reach 2R: Wetland [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 2.032 ac, 10.33% Impervious, Inflow Depth = 0.26" for 1.25' Event event Inflow = 0.47 cfs @ 12.32 hrs, Volume= 0.044 of Outflow = 0.47 cfs @ 12.32 hrs, Volume= 0.044 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph ----------------------- -' ---------------------' ■IMo—w "" ■ Out6ow 0.s 0.47 cfs--------- "------------lnflow-area=2:032-ac- 0.45 "---------------------------------------------------- 0.35 ------ ----------------------------------------------------- ------ --------------- 0.3 ---___ -__.-------------------------------------------------- c0.25 _ - - - -- ----------------------------------------------------- LL 0.2 ------ ----------------------------------------------------- ------------------------------ __-----__0.15 0.15 -------_-_---_ 0.1 ------ ---------------------------------------------------- 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 Time (hours) Proposed HydroCAD - 17516 MSE 24 -hr 3 1.25" Event Rainfall=1.25" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 13 Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.231 ac, 58.65% Impervious, Inflow Depth = 0.68" for 1.25" Event event Inflow = 1.59 cfs @ 12.33 hrs, Volume= 0.296 of Outflow = 1.59 cfs @ 12.33 hrs, Volume= 0.296 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 3R: Total Hydrograph Time (hours) m1 -flow ■ OUMOW Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 20 MSE 24 -hr 3 1.25" Event Rainfall=1.25" Summary for Pond UG: UG Detention Printed 6/15/2018 Inflow Area = 3.169 ac, 90.15% Impervious, Inflow Depth = 0.95" for 1.25" Event event Inflow = 4.78 cfs @ 12.14 hrs, Volume= 0.251 of Outflow = 1.12 cfs @ 12.40 hrs, Volume= 0.251 af, Atten= 76%, Lag= 15.4 min Primary = 1.12 cfs @ 12.40 hrs, Volume= 0.251 of Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 961.76' @ 12.40 hrs Surf.Area= 0.118 ac Storage= 0.093 of Plug -Flow detention time= 45.1 min calculated for 0.251 of (100% of inflow) Center -of -Mass det. time= 45.2 min ( 818.2 - 773.0 ) Volume Invert Avail Storage Storage Description #1 960.63' 0.714 of 72.0" Round Pipe Storage L= 1,100.0' Device Routing Invert Outlet Devices #1 Primary 960.63' 18.0" Round Culvert L= 104.0' Ke= 0.500 Inlet/ Outlet Invert= 960.63'/ 959.59' S=0.01001/1 Cc= 0.900 n=0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 960.63' 6.0" W x 6.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 963.09' 12.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=1.12 cfs @ 12.40 hrs HW=961.76' (Free Discharge) tCulvert (Passes 1.12 cfs of 5.15 cfs potential flow) 2=Orifice/Grate (Orifice Controls 1.12 cfs @ 4.50 fps) 3=Orifice/Grate ( Controls 0.00 cfs) Proposed HydroCAD -17516 Prepared by Loucks MSE 24 -hr 3 1.25" Event Rainfall= 1. 25" Printed 6/15/2018 Pond UG: UG Detention 4.78 cfs 5- Inflow Area=3.169 ac ------ --------------------------- Peak -ECev=961-.76'-- ' Storage=0.093 of 'w 3 U 3 LL ,-r--1 1.12 cts ------------- ----------------- Time (hoes) ■ Inflow ■ Pnmary Proposed HydroCAD -17516 MSE 24 -hr 3 2 -Year Rainfall=2.84" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 16 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment B: Runoff Area=1.127 ac 100.00% Impervious Runoff Depth=2.61" Tc=7.0 min CN=0/98 Runoff=4.44 cfs 0.245 of Subcatchment N: Runoff Area=2.032 ac 10.33% Impervious Runoff Depth= 1.28" Flow Length=345' Tc=19.1 min CN=80/98 Runoff=2.87 cfs 0.217 of Subcatchment P: Runoff Area=2.042 ac 84.72% Impervious Runoff Depth=2.38" Tc=7.0 min CN=80/98 Runoff=7.42 cfs 0.406 of Subcatchment W: Runoff Area=0.030 ac 3.33% Impervious Runoff Depth= 1.18" Tc=7.0 min CN=80/98 Runoff=0.06 cfs 0.003 of Reach 1 R: Century Blvd Inflow=1.80 cfs 0.654 of Outflow=1.80 cfs 0.654 of Reach 2R: Wetland Inflow=2.87 cfs 0.217 of Outflow=2.87 cfs 0.217 of Reach 3R: Total Inflow=4.64 cfs 0.871 of Outflow=4.64 cfs 0.871 of Pond UG: UG Detention Peak Elev=963.09' Storage=0.275 of Inflow=11.86 cfs 0.651 of Outflow=1.79 cfs 0.651 of Total Runoff Area = 5.231 ac Runoff Volume = 0.871 of Average Runoff Depth = 2.00" 41.35% Pervious = 2.163 ac 58.65% Impervious = 3.068 ac Proposed HydroCAD - 17516 MSE 24 -hr 3 2 -Year Rainfall=2.84" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 17 Summary for Subcatchment B: Runoff = 4.44 cfs @ 12.14 hrs, Volume= 0.245 af, Depth= 2.61" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 2 -Year Rainfall=2.84" Area (ac) CN Description 1.127 98 Paved parking HSG D 1.127 98 100.00% Impervious Area Tc Length Slope Velocity Capacity Description W Direct Entry, Subcatchment B: ■Runoff ,T-------- 3 -- - - - -- W 3 0 -------- ---------------------------------------MSE-24-hr-3- 2-Year SE24-hr3- 2-Year Rainfall=2.84" Runoff Area=1.127 ac ------------------------ Min -off V-d[(jme=D:245-af-- Runoff Depth=2.61" ---------------------------------------- Tc=7.0 min - CN=0/98 4 6 8 10 12 14 16 18 20 22 24 2"6'28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) Proposed HydroCAD - 17516 Prepared by Loucks HydroCAD@ 10.00-20 s/n 02676 © 2017 MSE 24 -hr 3 2 -Year Rainfall=2.84" Summary for Subcatchment N: Runoff = 2.87 cfs @ 12.29 hrs, Volume= 0.217 af, Depth= 1.28" Printed 6/15/2018 Runoff by SCS TR -20 method, UH=SCS, Split Pervious/[mperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 2 -Year Rainfall=2.84" Area (ac) CN Descriotion 0.210 98 Paved parking, HSG D 1.822 80 >75% Grass cover, Good, HSG D 2.032 82 Weighted Average 1.822 80 89.67% Pervious Area 0.210 98 10.33% Impervious Area Tc Length Slope Velocity Capacity Description 18.9 300 0.1008 0.26 Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" 0.2 45 0.0667 3.87 Shallow Concentrated Flow, Grassed Waterwav Kv= 15.0 fos 19.1 345 Total 3 , 2 LL Subcatchment N: Hydrograph MSE 24 -hr 3 2 -Year Rainfall=2.84" Runoff Area=2.032 ac Runoff Volume=0.217 of Runoff Depth=1.28" Flow Length=345' --------------------------------------- T -c-19 4 mtn- CN=80/98 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) ■ Runoff Proposed HydroCAD -17516 Prepared by Loucks MSE 24 -hr 3 2 -Year Rainfall=2.84" Printed 6/15/2018 Summary for Subcatchment P: Runoff = 7.42 cfs @ 12.14 hrs, Volume= 0.406 af, Depth= 2.38" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 2 -Year Rainfall=2.84" Area (ac) CN Description 1.730 98 Paved parking, HSG D 2.042 95 Weighted Average 0.312 80 15.28% Pervious Area 1.730 98 84.72% Impervious Area Tc Length Slope 7.0 0 Capacity Description Direct Entry, Subcatchment P: Hydrograph --- ------- 7.42 cfs -----------------------------------------------MSE 24--hr-3- _________ ----------------------------- 2 -Year Rainfal1=2.84"- Runoff Area=2.042 ac -------------------------RUnOff VOMffd=-0:40-6-af- ------------------------------- Runoff-Depth=2.38"- Tc=7.0 min CN =80/98__ _ __ ____ 4 8 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 66 70 72 Time (hours) ■Runoff Proposed HydroCAD -17516 MSE 24 -hr 3 2 -Year Rainfall=2.84" Prepared by Loucks Printed 6/15/2018 HydroCAD®10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 20 Summary for Subcatchment W: Runoff = 0.06 cfs @ 12.15 hrs, Volume= 0.003 af, Depth= 1.18" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 2 -Year Rainfall=2.84" Area (ac) CN Description 0.001 98 Paved parking, HSG D 0.029 80 >75% Grass cover, Good, HSG D 0.030 81 Weighted Average 0.029 80 96.67% Pervious Area 0.001 98 3.33% Impervious Area Tc Length Slope Velocity Capacity Description 7.0 Direct Entry, Subcatchment W: Hydrograph 0.065- ---------------------------...- --- --------------------------------- ____ 0,06 Cfs 0.06 " SE_24-hr 3 0.055 " " ---------------------------------------_ ----------------------------------Mew-Rainfall=2.84" O.oS " -------------Runoff-Area=0MO-ac- 0.045 " ------------------ ----Runoff-Volume=0:003af- ... 6.04 e 0.035 "________________________________________________ -- - - - - -- ----- -------------------RtinoffDepiFi='�.'t8i`- 0.03 __�__M 1 C=70 m m________________________.____ "--------- -________________________________0.025 CN=80/980.02-------------------------------------------------------------- -------------------- --- 0.015 "0.01 ____________________________.____-________-_______-____________ 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 Time (hours) ■ Runoff Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 20 Solutions MSE 24 -hr 3 2 -Year Rainfall=2.84" Printed 6/15/2018 Summary for Reach 1 R: Century Blvd [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 3.199 ac, 89.34% Impervious, Inflow Depth = 2.45' for 2 -Year event Inflow = 1.80 cfs @ 12.50 hrs, Volume= 0.654 of Outflow = 1.80 cfs @ 12.50 hrs, Volume= 0.654 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd Time (hours) ■Inflow ■ Outtlow Proposed HydroCAD - 17516 MSE 24 -hr 3 2 -Year Rainfall=2.84" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 22 Summary for Reach 2R: Wetland [40) Hint: Not Described (Outflow=Inflow) Inflow Area = 2.032 ac, 10.33% Impervious, Inflow Depth = 1.28" for 2 -Year event Inflow = 2.87 cfs @ 12.29 hrs, Volume= 0.217 of Outflow = 2.87 cfs @ 12.29 hrs, Volume= 0.217 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph Time (hours) ■ Inflow ■ Outflow Proposed HydroCAD -17516 Prepared by Loucks MSE 24 -hr 3 2 -Year Rainfall=2.84" Printed 6/15/2018 Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.231 ac, 58.65% Impervious, Inflow Depth = 2.00" for 2 -Year event Inflow = 4.64 cfs @ 12.30 hrs, Volume= 0.871 of Outflow = 4.64 cfs @ 12.30 hrs, Volume= 0.871 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 3R: Total Hydrograph Time (hours) ■ Intlow ■ Outflow Proposed HydroCAD - 17516 MSE 24 -hr 3 2 -Year Rainfall=2.84" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 24 Summary for Pond UG: UG Detention Inflow Area = 3.169 ac, 90.15% Impervious, Inflow Depth = 2.46" for 2 -Year event Inflow = 11.86 cfs @ 12.14 hrs, Volume= 0.651 of Outflow = 1.79 cfs @ 12.52 hrs, Volume= 0.651 af, Atten= 85%, Lag= 23.1 min Primary = 1.79 cfs @ 12.52 hrs, Volume= 0.651 of Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 963.09' @ 12.52 hrs Surf.Area= 0.149 ac Storage= 0.275 of Plug -Flow detention time= 69.9 min calculated for 0.650 of (100% of inflow) Center -of -Mass det. time= 69.9 min ( 827.6 - 757.7 ) Volume Invert Avail.Storage Storage Description #1 960.63' 0.714 of 72.0" Round Pipe Storage L= 1,100.0' Device Routing Invert Outlet Devices #1 Primary 960.63' 18.0" Round Culvert L= 104.0' Ke= 0.500 Inlet/ Outlet Invert= 960.63'/ 959.59' S= 0.0100 'P Cc= 0.900 n=0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 960.63' 6.0" W x 6.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 963.09' 12.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=1.79 cfs @ 12.52 hrs HW=963.09' (Free Discharge) tnuivert (Passes 1.79 cfs of 10.86 cfs potential flow) 2=Orifice/Grate (Orifice Controls 1.79 cfs @ 7.15 fps) 3=Orifice/Grate ( Controls 0.00 cfs) Proposed HydroCAD - 17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 2017 MSE 24 -hr 3 2 -Year Rainfall=2.84" Printed 6/15/2018 Pond UG: UG Detention Hydrograph ---------- — --------------------- ------------------------------- 13 11.86 cfs ------------------------------------------ 12 ------ ----------------------- Inflow-Area=3.16gac- „ ---------------------------PealicElav=963.-Ogv 10 -------- ------------------------------------------------ ----- ''"-------------------------------------- Storage=_0 27-5-af_ 8 -------- ------------------------------------------------------ 7- __ ________________ N 0 6 LL 6 4 1.79 ds 2-- ----------------------- ---' ------ 24 26 28 30 32 34 36 38 40 42 44 46 Time (hours) ■ Inflow ■ Pdmary Proposed HydroCAD - 17516 MSE 24-hr 3 10-Year Rainfall=4.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 26 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentB: Runoff Area=1.127 ac 100.00% Impervious Runoff Depth=3.96" Tc=7.0 min CN=0/98 Runoff=6.62 cfs 0.372 of SubcatchmentN: Runoff Area=2.032 ac 10.33% Impervious Runoff Depth=2.39" Flow Length=345' Tc=19.1 min CN=80/98 Runoff=5.43 cfs 0.405 of SubcatchmentP: Runoff Area=2.042 ac 84.72% Impervious Runoff Depth=3.70" Tc=7.0 min CN=80/98 Runoff= 11.35 cfs 0.629 of Subcatchment W: Runoff Area=0.030 ac 3.33% Impervious Runoff Depth=2.27" Tc=7.0 min CN=80/98 Runoff=0.12 cfs 0.006 of Reach 1R: Century Blvd Inflow=4.58 cfs 1.007 of Outflow=4.58 cfs 1.007 of Reach 211: Wetland Inflow=5.43 cfs 0.405 of Outflow=5.43 cfs 0.405 of Reach 3R: Total Inflow=9.86 cfs 1.412 of Outflow=9.86 cfs 1.412 of Pond UG: UG Detention Peak Elev=963.92' Storage=0.401 of Inflow= 17.97 cfs 1.001 of Outflow=4.54 cfs 1.001 of Total Runoff Area = 5.231 ac Runoff Volume = 1.412 of Average Runoff Depth = 3.24" 41.35% Pervious = 2.163 ac 58.65% Impervious = 3.068 ac Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 @ 2017 MSE 24 -hr 3 10 -Year Rainfall=4.20" Printed 6/15/2018 Summary for Subcatchment B: Runoff = 6.62 cfs @ 12.14 hrs, Volume= 0.372 af, Depth= 3.96" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 10 -Year Rainfall=4.20" Area (ac) CN Description 1.127 98 Paved parking HSG D 1.127 98 100.00% Impervious Area Tc Length Slope Description 7.0 Direct Entry, Subcatchment B: Hydrograph ________________________________ ----------------------------- ----MSE 24 -hr -3- 6- 10 -Year Rainfall=4.20" 5 -------- ----------------------------Run-off Area=1:127-a�c- Run_ off Volume=0.372 of --------------------------------------- - - ----------------- 3 4 Runoff Depth=3.96" --------- ----------------------------------------Tc=7.0min- 3 CN=0/98 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 Time (hours) ■ Runoff Proposed HydroCAD -17516 Prepared by Loucks HydroCAD@ 10.00-20 s/n 02676 @ 20 MSE 24 -hr 3 10 -Year Rainfall=4.20" Summary for Subcatchment IN: Runoff = 5.43 cfs @ 12.29 hrs, Volume= 0.405 af, Depth= 2.39" Printed 6/15/2018 Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 10 -Year Rainfall=4.20" Area (ac) CN Description 0.210 98 Paved oarkina. HSG D 2.032 82 Weighted Average 1.822 80 89.67% Pervious Area 0.210 98 10.33% Impervious Area Tc Length Slope Velocity Capacity Description 18.9 300 0.1008 0.26 Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" 0.2 45 0.0667 3.87 Shallow Concentrated Flow, Grassed Waterwav Kv= 15.0 fos 19.1 345 Total Subcatchment N: Hydrograph -------------------------------------------------------------------- ■ Runoff -------------------------------------------- MSE 24 hr -3- 6 10 -Year Rainfall=4.20" -----------------------------------Runoff Area=2:032-ac- 4 Runoff Volume=0.405 of ------------------------------------R-unoff-Depth=2:39"- 3 LL Flow Length=345' 2 ----------------------------------------------- Tc=19.1 -mn- CN=80/98 ------------ 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 Time (hours) Proposed HydroCAD - 17516 MSE 24 -hr 3 10 -Year Rainfall=4.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 29 Summary for Subcatchment P: Runoff = 11.35 cis @ 12.14 hrs, Volume= 0.629 af, Depth= 3.70" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 10 -Year Rainfall=4.20" Area (ac) CN Description 1.730 98 Paved parking, HSG D 0.312 80 >75% Grass cover, Good HSG D 2.042 95 Weighted Average 0.312 80 15.28% Pervious Area 1.730 98 84.72% Impervious Area Tc Length Slope Description 7.0 Direct Entry, Subcatchment P: Hydrograph ----------------------- -------------------------------------- 12-, ___--_--_--_ ___-____-_-----___ 12 11.35 cfs ---------------------- --MS1E-24.h-r 1- --------------------------------------------------- 10 , 10 -Year Rainfall=4.20" --------- --------------------------------------------------------- ----------------------------- unoff_ Area=2.042 ac 6 --------- -------------------------- Runoff-Volu-me=0.6-29-af '--------------------------------------- Runoff Depfh=3170"_ 0 6 LL--------------------------------------------------Tz=7-0_min_ 5 ------- -------------------------------------------- CN=80/98- 4 3------------------------------------------------------------------ --------- -------------------------------------------------------- 2 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 Time -(hours) ■ Runoff Proposed HydroCAD - 17516 MSE 24 -hr 3 10 -Year Rainfall=4.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 30 Summary for Subcatchment W: Runoff = 0.12 cfs @ 12.14 hrs, Volume= 0.006 af, Depth= 2.27' Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 10 -Year Rainfall=4.20" Area (ac) CN Description 0.001 0.13 98 Paved parking, HSG D 0.029 0.12 80 >75% Grass cover, Good, HSG D 0.030 0.11 81 Weighted Average 0.029 0.1 80 96.67% Pervious Area 0.001 0.065 0.06 98 3.33% Impervious Area Tc Length Slope Description 7.0 Direct Entry, Subcatchment W: Hydrograph 0.13 ---------------------------- —------------------------------------ ___________________________________________________________________ 0.125 ---- 0.12 cfs ----------------------------------------------------- 0.12 ---- -------------------------------------A`-------A--y------ 0.115 --------I ------------------------------------- 1- 0.11 ___________________________________ IYfSE-2Y91r 0.105 _____ ___________________________ u 0.1 ------------------------------------- 0.09&10-1faR�i[�fafl=4:ti 0.09 ---------------------------------Ru[loff�►rea=QII3Qac-- 0.065 0.06 -------- ---- ---------------------- ------------------------------RAinofflrwumi=iOXOG-if- p0.075 _____________________________________________________________ s 0.07 , ---------------------------Runoff DeptFi 2- 7"-- ;0.065 - - - - - - - ----------------------------- 3 0.06 LL0.055 --------------------------------------------------- lllrn - - - - - ------------------------------------------ -- , 0.05 0.045 _____________________________________________ _-�/►+���� _______________________________________________\.iJ7 0.04 ___________________________________________________ __________ 0.035 0.03 ______________________________________________________ _______ 0.025 - _ 0.02 _____________________________________________________________ 0.015 _______._________.__.___________________________________________ 0.01 , _____________________________________________________________ 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 64 56 58 60 62 64 66 68 70 Time (hours) ■Runoff Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 20 MSE 24 -hr 3 10 -Year Rainfall=4.20" Printed 6/15/2018 Summary for Reach 1 R: Century Blvd [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 3.199 ac, 89.34% Impervious, Inflow Depth = 3.78" for 10 -Year event Inflow = 4.58 cfs @ 12.37 hrs, Volume= 1.007 of Outflow = 4.58 cfs @ 12.37 hrs, Volume= 1.007 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd Hydrograph Time (hours) ■ Inflow ■ outflow Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 n 20 MSE 24 -hr 3 10 -Year Rainfall=4.20" Printed 6/15/2018 Summary for Reach 2R: Wetland [401 Hint: Not Described (Outflow= Inflow) Inflow Area = 2.032 ac, 10.33% Impervious, Inflow Depth = 2.39" for 10 -Year event Inflow = 5.43 cfs @ 12.29 hrs, Volume= 0.405 of Outflow = 5.43 cfs @ 12.29 hrs, Volume= 0.405 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph Time (hours) ■Inflow ■ Outflow Proposed HydroCAD -17516 MSE 24 -hr 3 10 -Year Rainfall=4.20" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 33 Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.231 ac, 58.65% Impervious, Inflow Depth = 3.24" for 10 -Year event Inflow = 9.86 cfs @ 12.31 hrs, Volume= 1.412 of Outflow = 9.86 cfs @ 12.31 hrs, Volume= 1.412 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs 9.86 0 2 4 6 8 10 Reach 3R: Total Hydrograph ir -------- -----------------------Inflow-Area=5.23'-ac- 12 34 36 38 40 42 44 46 48 50 52 54 56 Time (hours) ■ Inflow ■ Outflow 7 ------ 6 _____- 3 0 5 IL a 4 _-__-- 0 2 4 6 8 10 Reach 3R: Total Hydrograph ir -------- -----------------------Inflow-Area=5.23'-ac- 12 34 36 38 40 42 44 46 48 50 52 54 56 Time (hours) ■ Inflow ■ Outflow Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 20 MSE 24 -hr 3 10 -Year Rainfall=4.20" Summary for Pond UG: UG Detention Printed 6/15/2018 Inflow Area = 3.169 ac, 90.15% Impervious, Inflow Depth= 3.79" for 10 -Year event Inflow = 17.97 cfs @ 12.14 hrs, Volume= 1.001 of Outflow = 4.54 cfs @ 12.37 hrs, Volume= 1.001 af, Atten= 75%, Lag= 14.0 min Primary = 4.54 cfs @ 12.37 hrs, Volume= 1.001 of Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 963.92' @ 12.37 hrs Surf.Area= 0.151 ac Storage= 0.401 of Plug -Flow detention time= 69.2 min calculated for 1.001 of (100% of inflow) Center -of -Mass det. time= 69.2 min ( 821.0 - 751.8 ) Volume Invert Avail.Storape Storage Description #1 960.63' 0.714 of 72.0" Round Pipe Storage L= 1,100.0' Device Routing Invert Outlet Devices #1 Primary 960.63' 18.0" Round Culvert L= 104.0' Ke= 0.500 Inlet/ Outlet Invert= 960.63'/ 959.59' S= 0.0100 T Cc= 0.900 n=0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 960.63' 6.0" W x 6.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 963.09' 12.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=4.53 cfs @ 12.37 hrs HW=963.92' (Free Discharge) trCuivert (Passes 4.53 cfs of 12.93 cfs potential flow) 2=Orifice/Grate (Orifice Controls 2.10 cfs @ 8.39 fps) 3=Orifice/Grate (Orifice Controls 2.43 cfs @ 2.92 fps) Proposed HydroCAD -17516 Prepared by Loucks MSE 24 -hr 3 10 -Year Rainfall=4.20" Printed 6/15/2018 Software Pond UG: UG Detention Hydrograph 20 --- 17.97 cfs --------------------------------------------------- 19 ---------- -----------------------inflow-Area=3-189-ac- ,8 ------ ------ ------------------------------------ 17 -------- --------------------------- f glcElev=963- i692 ------------------------------------------------- --------- s�1 ,�{{ //}} w 14 15 -----------------------------------StarGcre='.Or.4 1-Q1 - __-___ _____________ 13 ___________________________________________________________ 12 ______ _______________________ 'g 11 ____________________________________________________________ 3 10 u. 9 _____________________________________________________ 8 _ ___ _________________________________________________________ 6 -- 4.54 ds ----------------------------------------------------- 3 __ ______.___________________________________________________ 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 Time (hours) ■ Inflow ■ Primary Proposed HydroCAD - 17516 MSE 24-hr 3 100-Year Rainfall=7.18" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 36 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment B: Runoff Area=1.127 ac 100.00% Impervious Runoff Depth=6.94" Tc=7.0 min CN=0/98 Runoff= 11.37 cfs 0.652 of Subcatchment N: Runoff Area=2.032 ac 10.33% Impervious Runoff Depth=5.08" Flow Length=345' Tc=19.1 min CN=80/98 Runoff= 11.44 cfs 0.859 of Subcatchment P: Runoff Area=2.042 ac 84.72% Impervious Runoff Depth=6.62" Tc=7.0 min CN=80/98 Runoff=20.01 cfs 1.127 of Subcatchment W: Runoff Area=0.030 ac 3.33% Impervious Runoff Depth=4.93" Tc=7.0 min CN=80/98 Runoff=0.25 cfs 0.012 of Reach 1R: Century Blvd Inflow= 10.12 cfs 1.791 of Outflow= 10.12 cfs 1.791 of Reach 2R: Wetland Inflow=11.44 cfs 0.859 of Outflow=11.44 cfs 0.859 of Reach 311: Total Inflow=21.52 cfs 2.651 of Outflow=21.52 cfs 2.651 of Pond UG: UG Detention Peak Elev=965.92' Storage=0.667 of Inflow=31.37 cfs 1.779 of Outflow=10.04 cfs 1.779 of Total Runoff Area = 5.231 ac Runoff Volume = 2.651 of Average Runoff Depth = 6.08" 41.35% Pervious = 2.163 ac 58.65% Impervious = 3.068 ac Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 20 MSE 24 -hr 3 100 -Year Rainfall= 7.18" Printed 6/15/2018 LLC Summary for Subcatchment B: Runoff = 11.37 cfs @ 12.14 hrs, Volume= 0.652 af, Depth= 6.94" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 100 -Year Rainfall=7.18" Area (ac) CN Description 1.127 98 Paved parking HSG D 1.127 98 100.00% Impervious Area Tc Length Slope Velocity Capacity Description 7.0 Direct Entry, Subcatchment B: Hydrograph ______________ -____________________-_-________-_______- 12 11.37 cfs 11 MSS �4-hr I --------- --------------------------------------------------------- 10 " 100 -Year Rainfall=7.18" --------- --------------------------------------------------------- 9 " -----------------------------unoff Area=1.127 ac 8--" -------------------------- uno_ff__Volume=0.652_af_ Z- "--------------------------------------- Runoff Qepth=6.94"_ e 6 LL-----------------------------------Tc:P7_.0_mir>__ 5 _________ -------------------------------------------- CN=019a- 4 3 ---------- -------------------------------------------------------- ________ -------------------------------------------------------- 2 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 M 52 54 56 58 60 62 64 66 68 70 72 Time (hours) ■ Runoff Proposed HydroCAD - 17516 MSE 24 -hr 3 100 -Year Rainfall=7.18" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 38 Summary for Subcatchment N: Runoff = 11.44 cfs @ 12.28 hrs, Volume= 0.859 af, Depth= 5.08" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 100 -Year Rainfall=7.18" Area (ac) CN Description 0.210 98 Paved parking, HSG D 1.822 80 >75% Grass cover, Good, HSG D 2.032 82 Weighted Average 1.822 80 89.67% Pervious Area 0.210 98 10.33% Impervious Area Tc Length Slope Velocity Capacity Description 18.9 300 0.1008 0.26 Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" 0.2 45 0.0667 3.87 Shallow Concentrated Flow, Grassed Waterwav Kv= 15.0 fos 19.1 345 Total Subcatchment N: Hydrograph ________________________________________ ________ ■Runoff 12 11.44 cfs --------- --------------------------------------- 11 ' MSF --2-4.h 7f a ----=----------------- 10 ' 100 Year Rainfall=7.18" --------- -------------------------------------------------------- 9 " -------------------------- Runoff Area=2.032 ac - 6 " Runoff_ Volume=0.859 of --------- ----------------------- -------------------------------------- Runoff DeFth=5.08"_ LL 6 ' -------------------------------Flow- Length=345' 5 ----------------------------------------------- Tc;;1-9.1 -min- - 4 3 -------------------------------------------------- EN=8019S- 2 , ________________________________________________________________ _______________________________________________________ 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 Time (hours) Proposed HydroCAD - 17516 MSE 24 -hr 3 100 -Year Rainfall=7.18" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 39 Summary for Subcatchment P: Runoff = 20.01 cfs @ 12.14 hrs, Volume= 1.127 af, Depth= 6.62" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 100 -Year Rainfall=7.18" Area (ac) CN Description 1.730 98 Paved parking, HSG D 0.312 80 >75% Grass cover, Good HSG D 2.042 95 Weighted Average 0.312 80 15.28% Pervious Area 1.730 98 84.72% Impervious Area Tc Length Description 7.0 Direct Entry, Subcatchment P: 22 21 -------------------------------------------------------------------- 20.01 cfs j ------------------------------------------------------ 20...--------- 19 ----------------------------------------idl�f-X . $ - --------- --------------------------------`------------------------ 18 ' 1T--------- -----------------------------------400=Yvc-w Rainfall=7.18"- -------------------------------,,----------------1----------- 15 '. --------- -----------------------------ftniW-Area=2.flQ -aC- 14 ----------------------------------- R-unof#'YVume"•1a2Ta-f- ..13 12- --------- --------------------------------------------------------- _______ ________________________12 --------- -------------------------------R-no# Depth=6.62"-- 3 v. 11 10 --------- ------------------------------------^ ______ TG_7:0-mim - e--------- g_________ -------------------------------------------- ____________________________________________ 7 _________________________________________________________________ g________ ________________________________________________________ 5 ___________________________________._____________________________ _______________________________________._._____-_-_____ 3 ____________________________.____________________________________ _______________________________________________________ 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 Time (hours) ■ Runof( Proposed HydroCAD -17516 Prepared by Loucks HvdroCAD@ 10.00-20 s/n 02876 ccn 2n MSE 24 -hr 3 100 -Year Rainfall=7.18" Printed 6/15/2018 Summary for Subcatchment W: Runoff = 0.25 cfs @ 12.14 hrs, Volume= 0.012 af, Depth= 4.93" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 100 -Year Rainfall=7.18" Area (ac) CN Description 0.001 98 Paved parking, HSG D 0.029 80 >75% Grass cover, Good HSG D 0.030 81 Weighted Average 0.029 80 96.67% Pervious Area 0.001 98 3.33% Impervious Area To Length 7.0 Description Direct Entry, Subcatchment W: Hydrograph ____________________________________________________ 0.2e 0.25 cfs --------- ----------------- 0.24 '-------------MSE-24 h 3- -------- --------------------- -------------------------------- 0.22 _________________________100-Year_Rainfall=7.18"_ °'2---------------------------Runoff-Area=0-03Qac_ _.._ ________________________ Runoff-Volume=0:0-42-af-- � os ' ------------------------------------RunoffDepth=4.93 3 0.14 ' s 0.12 Td*T. V -m in - --------------------------------------------------------------- 0.1 = ------ -----------------------------------------------=80/ ---- 1 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 7o Time (hours) ■ Runoft Proposed HydroCAD - 17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 20 MSE 24 -hr 3 100 -Year Rainfall=7.18" Printed 6/15/2018 r — .. Summary for Reach 1 R: Century Blvd [401 Hint: Not Described (Outflow=Inflow) Inflow Area = 3.199 ac, 89.34% Impervious, Inflow Depth= 6.72" for 100 -Year event Inflow = 10.12 cfs @ 12.32 hrs, Volume= 1.791 of Outflow = 10.12 cfs @ 12.32 hrs, Volume= 1.791 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd Hydrograph ---------------------- — ------------------------ ■ Inflow 11 -- ---------------------------------------------------- 10.1■o�movr o " _________________________ Inflow_Area-3.199 ac_ 9 ------------------------------------------------ g__________________ ________ ________7 ___________________________________________________________________________________________________________________izz 54 " __________________________________________________________3 _______________________________________________ 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 Time (hours) Proposed HydroCAD -17516 Prepared by Loucks HydroCAD@ 10.00-20 s/n 02676 @ 20 MSE 24 -hr 3 100 -Year Rainfall=7.18" Printed 6/15/2018 is LLC Paae 42 Summary for Reach 2R: Wetland [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 2.032 ac, 10.33% Impervious, Inflow Depth = 5.08" for 100 -Year event Inflow = 11.44 cfs @ 12.28 hrs, Volume= 0.859 of Outflow = 11.44 cfs @ 12.28 hrs, Volume= 0.859 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph ---- ---------------------------------------------------- 121' ------------------------------------------------12 -- 11.44 cfs -------------------- Tfi low Area=2:0-32 Ac ------ ------------------------------------------------------- 10-1 ------------------------------------------------------ 10 ------- -__-__________________________.___-_-___-__-_____---_____ y-___________________________________________________________ 8 ______------------------------------------------------------- 7-" ____________________________________________________T ____________________________________________________________ e 8------- _______________________________________________________ LL 5 ------ ------------------------------------------------------- 4- ______________________________________________________4 ------ _______________________________________________________ 3 " ____________________________________________________________ 2 _-____------------------------------------------------------ 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 Time (hours) Proposed HydroCAD -17516 Prepared by Loucks MSE 24 -hr 3 100 -Year Rainfall=7.18" Printed 6/15/2018 LLC Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.231 ac, 58.65% Impervious, Inflow Depth= 6.08" for 100 -Year event Inflow = 21.52 cfs @ 12.29 hrs, Volume= 2.651 of Outflow = 21.52 cfs @ 12.29 hrs, Volume= 2.651 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach 3R: Total Hydrograph ------------------------------------------- ■ Inflow 23 ________ ■Outflow ' , -- 21.52 cfs------------------ --------------------- 22 -- -----------------------MfIOw-Area=5331-ac-- 21------------ — ----------------------------------------------- 20 ---------------------------------------------------- --- __ 19 _________________________________________________________ 18 ______________________________________________________________ __ 17 ___ __________________________________________________ 16 ________ __ 15 ___________________________________________________ ______ 14 ______ ________________________ '`u 13 ______------------------------------------------------------- 12- - - _______________________________________12,, _____________________________________________. __ _0 11 ___________________________________________________________ 10 y __ _______ ____________________________ g___________________________________________________________ 7 ____________________________________________________________ __ 6 __________________________________________________________. 5 __________________________________________________________ q________________________________________________________ 3 1 ______________________________________________ 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 Time (hours) Proposed HydroCAD -17516 Prepared by Loucks HydroCAD@ 10.00-20 s/n 02676 © 2017 MSE 24 -hr 3 100 -Year Rainfall=7.18" Summary for Pond UG: UG Detention Printed 6/15/2018 Inflow Area = 3.169 ac, 90.15% Impervious, Inflow Depth= 6.74" for 100 -Year event Inflow = 31.37 cfs @ 12.14 hrs, Volume= 1.779 of Outflow = 10.04 cfs @ 12.32 hrs, Volume= 1.779 af, Atten= 68%, Lag= 10.8 min Primary = 10.04 cfs @ 12.32 hrs, Volume= 1.779 of Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 965.92' @ 12.32 hrs Surf.Area= 0.098 ac Storage= 0.667 of Plug -Flow detention time= 61.2 min calculated for 1.779 of (100% of inflow) Center -of -Mass det. time= 60.8 min ( 805.9 - 745.1 ) Volume Invert Avail.Storage Storage Description #1 960.63' 0.714 of 72.0" Round Pipe Storage L= 1,100.0' Device Routing Invert Outlet Devices #1 Primary 960.63' 18.0" Round Culvert L= 104.0' Ke= 0.500 Inlet/ Outlet Invert= 960.63'/ 959.59' S=0.0100'/' Cc= 0.900 n=0.013 Corrugated PE, smooth interior, Flow Area= 1.77 sf #2 Device 1 960.63' 6.0" W x 6.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 963.09' 12.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 rimary OutFlow Max=10.01 cfs @ 12.32 hrs HW=965.91' (Free Discharge) Culvert (Passes 10.01 cfs of 16.88 cfs potential flow) 2=Orifice/Grate (Orifice Controls 2.70 cfs @ 10.79 fps) 3=Orifice/Grate (Orifice Controls 7.32 cfs @ 7.32 fps) Proposed HydroCAD -17516 Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 2017 MSE 24 -hr 3 100 -Year Rainfall=7.18" Printed 6/15/2018 Pond UG: UG Detention Hydrograph ----------------------------------------------------------------- 3a 31.37 cfs I ------ -------------------------------------- 32 ,'�-----------_______ ---------------------Inflow area=3:1�6g ac= 30 • , 26 - -f'e -------- ---------------------------ak-Elev=J65:9,2`- •-------- ------ ------------------ 26 24 ----------------------------- Storage=0,.667-a€- 20 18 .. ______ _________________ ii 16 _____________________________ LL________ ------------------------------------------------------ 14 ______________ ____________________ __14 12 10.04 cfs , ------------------------------------------------------------ 8 4 28 30 32 34 36 38 40 42 44 46 Time (hours) ■ Inflow ■ Primary Century Blvd 2R Wetland UG Detention Ww Subcat Reach on Lin J, Proposed HydroCAD -17516 (Snowmelt) Prepared by Loucks HydroCAD® 10.00-20 s/n 02676 © 2017 HydroCAD S Area Listing (all nodes) Area CN Description acres) (subcatchment-numbers) 2.163 100 >75% Grass cover, Good, HSG D (N, P, W) 3.068 100 Paved parking, HSG D (B, IN, P, W) 5.231 100 TOTAL AREA Printed 6/15/2018 Proposed HydroCAD - 17516 (Snowmelt) Prepared by Loucks Printed 6/15/2018 HvdroCAD® 10.00-20 s/n 02676 @2017 HvdroCAD Software Solutions LLC Pana 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 5.231 HSG D B, N, P, W 0.000 Other 5.231 TOTAL AREA Proposed HydroCAD - 17516 (Snowmelt) Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG -A HSG -13 HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 2.163 0.000 2.163 >75% Grass cover, Good N, P, W 0.000 0.000 0.000 3.068 0.000 3.068 Paved parking B, N, P, W 0.000 0.000 0.000 5.231 0.000 5.231 TOTAL AREA Proposed HydroCAD -17516 (Snowmelt) Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 © 2017 HydroCAD Software Solutions LLC Page 5 Pipe Listing (all nodes) Line# Node In -Invert Out -Invert Length Slope n Diam/Width Height Inside -Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 UG 960.63 959.59 104.0 0.0100 0.013 12.0 0.0 0.0 Proposed HydroCAD - 17516 (SnowWSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 6 Time span=0.00-300.00 hrs, dt=0.05 hrs, 6001 points Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment B: Runoff Area=1.127 ac 100.00% Impervious Runoff Depth=7.20" Tc=7.0 min CN=0/100 Runoff= 1.35 cfs 0.676 of Subcatchment N: Runoff Area=2.032 ac 100.00% Impervious Runoff Depth=7.20" Flow Length=345' Tc=19.1 min CN=0/100 Runoff=2.43 cfs 1.219 of Subcatchment P: Runoff Area=2.042 ac 100.00% Impervious Runoff Depth=7.20" Tc=7.0 min CN=0/100 Runoff=2.44 cfs 1.225 of Subcatchment W: Runoff Area=0.030 ac 100.00% Impervious Runoff Depth=7.20" Tc=7.0 min CN=0/100 Runoff=0.04 cfs 0.018 of Reach 1 R: Century Blvd Inflow=2.28 cfs 1.919 of Outflow=2.28 cfs 1.919 of Reach 2R: Wetland Inflow=2.43 cfs 1.219 of Outflow=2.43 cfs 1.219 of Reach 3R: Total Inflow=4.71 cfs 3.139 of Outflow=4.71 cfs 3.139 of Pond UG: UG Detention Peak Elev=962.77' Storage=0.258 of Inflow=3.79 cfs 1.901 of Outflow=2.26 cfs 1.901 of Total Runoff Area = 5.231 ac Runoff Volume = 3.139 of Average Runoff Depth = 7.20" 0.00% Pervious= 0.000 ac 100.00% Impervious= 5.231 ac Proposed HydroCAD - 17516 (Sno%MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 @ 2017 LLC Summary for Subcatchment B: Runoff = 1.35 cfs @ 120.64 hrs, Volume= 0.676 af, Depth= 7.20" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-300.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Area (ac) CN Description 1.127 100 Paved parking HSG D 1.127 100 100.00% Impervious Area Tc Length Slope Description 7.0 Direct Entry, Subcatchment B: Hydrograph 1,35 cfs I I ■Runoff MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Runoff Area=1.127 ac ---------------- Runoff V6lume=0.-676-6f Runoff Depth=7.20" Tc=7.0 min CN=0/100 20 40 60 80 100 120 140 160 180 200 220 240 260 280 Time (hours) Proposed HydroCAD - 17516 (SnowMSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment N: Runoff = 2.43 cfs @ 121.00 hrs, Volume= 1.219 af, Depth= 7.20" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/[mperv., Time Span= 0.00-300.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Area (ac) CN Description 0.210 100 Paved parking, HSG D ' 1.822 100 >75% Grass cover, Good, HSG D 2.032 100 2.032 100 Tc Length Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description 18.9 300 0.1008 0.26 Sheet Flow, Grass: Dense n= 0.240 P2= 2.90" 0.2 45 0.0667 3.87 Shallow Concentrated Flow, Grassed Waterwav Kv= 15.0 fos 19.1 345 Total Subcatchment N: Hydrograph 2.43 cfs MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" -------------------------------------------unci- Area-- 032a - z Runoff Area=2.032 ac Runoff Volume=1.219 of Runoff Depth=7.20" Flow Length=345' Tc=19.1 min LL 0 0 20 40 60 80 100 1z0 1a0 iso leo zoo 220 zao 260 290 Sao Time (hours) ■ Runoff Proposed HydroCAD - 17516 (SnowMSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 Summary for Subcatchment P: Runoff = 2.44 cfs @ 120.64 hrs, Volume= 1.225 af, Depth= 7.20" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-300.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Area (ac) CN Description 1.730 100 Paved parking, HSG D 0.312 100 >75% Grass cover, Good HSG D 2.042 100 Weighted Average 2.042 100 100.00% Impervious Area Tc Length Slope 7.0 Capacity Description (cfs) Direct Entry, Subcatchment P: Hydrograph 2.44 cfs I MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" ------------RurioffAfrea=2.047ac Runoff Volume=1.225 of Runoff Depth=7.20" Tc=7.0 min CN=0/100 140 160 Time (hours) 260 ■ Runoff Proposed HydroCAD - 17516 (SnowMSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment W: Runoff = 0.04 cfs @ 120.64 hrs, Volume= 0.018 af, Depth= 7.20" Runoff by SCS TR -20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-300.00 hrs, dt= 0.05 hrs MSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Area (ac) CN Descriotion 0.001 100 Paved parking, HSG D 0.029 100 >75% Grass cover, Good, HSG D 0.030 100 Weighted Average 0.030 100 100.00% Impervious Area Tc Length Slope 7.0 0.01 Capacity Description Direct Entry, Subcatchment W: Hydrograph ------------------- 0.04 cfs - ----------------- ----------------------------------------MSE 24 -hr -3 240.00-hrs- ------------------------ --------- 10=day-sriowmelf Rainfall=7:20" - ------------------------------------- ----------------- ------------------------------------------ Rumoff-AreaFO 030 ac_ -------------------------------------Runoff-Volume=0:018 af- ---------------------------------- — --------Rurroff-Depth=7.20"- ------------------------ ---------------------------------- ---------------------------Tc=7.0 min ----------------------- -------- — ---- ---- "=01100- 40 60 80 100 120 140 160 180 200 220 240 Time (hours) ■ Runoff Proposed HydroCAD - 17516 (SnoWWSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 11 Summary for Reach 1 R: Century Blvd [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 3.199 ac,100.00% Impervious, Inflow Depth = 7.20" for 10 -day snowmelt event Inflow = 2.28 cfs @ 121.08 hrs, Volume= 1.919 of Outflow = 2.28 cfs @ 121.08 hrs, Volume= 1.919 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-300.00 hrs, dt= 0.05 hrs Reach 1R: Century Blvd Hydrograph Time (hours) ■ Inflow ■ Outflow Proposed HydroCAD - 17516 (SnowWSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD@ 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 12 Summary for Reach 2R: Wetland [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 2.032 ac,100.00% Impervious, Inflow Depth = 7.20" for 10 -day snowmelt event Inflow = 2.43 cfs @ 121.00 hrs, Volume= 1.219 of Outflow = 2.43 cfs @ 121.00 hrs, Volume= 1.219 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-300.00 hrs, dt= 0.05 hrs Reach 2R: Wetland Hydrograph 1 2.43 cfs I N U 3 --------------------- LL 1 - ■Inflow ■ Outflow Inflow Area=2.032 ac 0 20 40 60 80 100 120 140 160 180 200 220 240 260 Time (hours) Proposed HydroCAD - 17516 (SnoWWSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 13 Summary for Reach 3R: Total [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 5.231 ac,100.00% Impervious, Inflow Depth = 7.20" for 10 -day snowmelt event Inflow = 4.71 cfs @ 121.04 hrs, Volume= 3.139 of Outflow = 4.71 cfs @ 121.04 hrs, Volume= 3.139 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-300.00 hrs, dt= 0.05 hrs Reach 3R: Total Hydrograph Time (hours) ■ Inflow ■ Outflow Proposed HydroCAD -17516 (SnovWWSE 24 -hr 3 240.00 hrs 10 -day snowmelt Rainfall=7.20" Prepared by Loucks Printed 6/15/2018 HydroCAD® 10.00-20 s/n 02676 @2017 HydroCAD Software Solutions LLC Page 14 Summary for Pond UG: UG Detention Inflow Area = 3.169 ac,100.00% Impervious, Inflow Depth = 7.20" for 10 -day snowmelt event Inflow = 3.79 cfs @ 120.64 hrs, Volume= 1.901 of Outflow = 2.26 cfs @ 121.11 hrs, Volume= 1.901 af, Atten= 40%, Lag= 28.5 min Primary = 2.26 cfs @ 121.11 hrs, Volume= 1.901 of Routing by Stor-Ind method, Time Span= 0.00-300.00 hrs, dt= 0.05 hrs Peak Elev= 962.77' @ 121.11 hrs Surr.Area= 0.164 ac Storage= 0.258 of Plug -Flow detention time= 52.6 min calculated for 1.901 of (100% of inflow) Center -of -Mass det. time= 52.6 min ( 7,261.3 - 7,208.7 ) Volume Invert Avail.Storage Storage Description #1 960.63' 0.805 of 72.0" Round Pipe Storage L= 1,240.0' Device Routing Invert Outlet Devices #1 Primary 960.63' 12.0" Round Culvert L= 104.0' Ke= 0.500 Inlet/ Outlet Invert= 960.63'/ 959.59' S=0.0100'/' Cc= 0.900 n=0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 960.63' 8.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=2.26 cfs @ 121.11 hrs HW=962.77' (Free Discharge) t1=Culvert (Passes 2.26 cfs of 4.26 cfs potential flow) L2=Orifice/Grate (Orifice Controls 2.26 cfs @ 6.47 fps) Pond UG: UG Detention _________________________: FM inflow ■ Primary Inflow Area=3.169 ac ----------- Peak _ELeY=_9617.7_'_- Storage=0.258 of ______________________-_______--______-_____________-____ ] 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Time (hours) Appendix C MIDS Calculator Report Project Information Calculator Version: Version 3: January 2017 Project Name: Control Concepts User Name / Company Name: Loucks Date: 06-15-2018 Project Description: 54.5 Construction Permit?: No Site Information Retention Requirement (inches): 1.1 Site's Zip Code: 55318 Annual Rainfall (inches): 29.7 Phosphorus EMC (mg/1): 0.3 TSS EMC (mg/1): 54.5 Total Site Area Land Cover A Soils B Soils C Soils D Soils Total (acres) (acres) (acres) (acres) (acres) Forest/Open Space - Undisturbed, protected 2.061 2.061 forest/open space or reforested land Managed Turf - disturbed, graded for yards or 0.312 0.312 other turf to be mowed/managed Impervious Area (acres) 2.857 Total Area (acres) 5.23 Site Areas Routed to BMPs Land Cover A Soils B Soils C Soils D Soils Total (acres) (acres) (acres) (acres) (acres) Forest/Open Space - Undisturbed, protected 0 forest/open space or reforested land Managed Turf - disturbed, graded for yards or 0.312 0.312 other turf to be mowed/managed Summary Information Performance Goal Requirement Performance goal volume retention requirement: 11408 ft3 Volume removed by BMPs towards performance goal: ft3 Percent volume removed towards performance goal % Annual Volume and Pollutant Load Reductions Post development annual runoff volume 6.4491 acre -ft Annual runoff volume removed by BMPs: 0 acre -ft Percent annual runoff volume removed: 0 % Post development annual particulate P load: 2.894 lbs Annual particulate P removed by BMPs: 1.647 lbs Post development annual dissolved P load: 2.368 lbs Annual dissolved P removed by BMPs: 1.347 lbs Percent annual total phosphorus removed: 57 % Post development annual TSS load: 956 lbs Annual TSS removed by BMPs: 820.6 lbs Percent annual TSS removed: 86 % BMP Summary Performance Goal Summary Annual Volume Summary BMP Volume Volume Volume Volume Percent BMP Name Capacity Recieved Retained Outflow Retained (ft3) (ft3) (ft3) (ft3) (°/U) Jellyfish JFPD0806 0 11408 0 11408 0 Annual Volume Summary Volume Load From Volume From Direct From Volume Volume Percent BMP Name Upstream Retained outflow Retained Watershed Load Retained (acre -ft) BMPs (acre -ft) (acre -ft) (%) (acre -ft) Retained (lbs) Jellyfish JFPD0806 6.2195 0 0 6.2195 0 Particulate Phosphorus Summary Load From Load From Load Outflow Percent BMP Name Direct Upstream Retained Load Retained Watershed BMPs Retained Load Retained (lbs) (lbs) (lbs) (lbs) (%) Jellyfish JFPD0806 2.7913 0 1.6469 1.1444 59 Dissolved Phosphorus Summary Load From Load From Load Outflow Percent BMP Name Direct Upstream Retained Load Retained Watershed BMPs Retained Load Retained Watershed BMPs (lbs) (lbs) (%) (lbs) (lbs) (lbs) (lbs) (%) Jellyfish JFPD0806 2.2838 0 1.3474 0.9364 59 TSS Summary Load From Load From Load Outflow Percent Direct Upstream BMP Name Retained Load Retained Watershed BMPs (lbs) (lbs) (%) (lbs) (lbs) Jellyfish JFPD0806 921.98 0 820.56 101.42 89 BMP Schematic Figures Existing Drainage Exhibit Proposed Drainage Exhibit ,.e, / ,,�,/�/\�1,!l/��/ 1 � '� . ,,, (%iii Ey\.'✓ �\ / r \ 1 i r- r� I O \ \X �9 5.161 AC LOT 2 \ 1 1` I — — o 1666666' �jjjl�`11�11 III 111111,\1 �MV\\\`' \111 _� *dlI