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42 EAST COAST DR PPRI21-0013 Ahearn Drainage Report - REV. 6-3-22 Drainage Calculations For Ahearn Mixed Use Prepared By: 219 N. Newman St. 2nd Floor, Jacksonville, FL 32202 Kyle F. Davis, P.E. FL Reg No. 63071 April 4, 2022 June 1, 2022 By Toni Gindlesperger at 9:23 am, Jun 03, 2022 By Mike Jones at 2:55 pm, Apr 24, 2023 TABLE OF CONTENTSI. Design NarrativeII. Project InformationA. Location MapB. Flood Insurance Rate MapIII. Drainage Basin CalculationsA. Time of ConcentrationB. Pre and Post Curve NumberC. Pond Stage StorageD. Treatment VolumeE. Pre/Post Summary TableIV. ICPR ReportA. Pre Development1. Nodal Diagram2. Input Report3. Basin Summary4. Node Min / Max ReportB. Post Development1. Nodal Diagram2. Input Report3. Basin Summary4. Node Min / Max Report Section I:Design Narrative Project NameProject LocationProject DescriptionAhearn Mixed42 East Coast DriveThe existing project site is 0.38 acres. The site was previouslydeveloped but all existing structures and pavement have beenremoved and the site is clear. The site appears to generally slopeto the adjacent streets.The proposed project consists of 16,000 SF building and parkinglot. Stormwater design consists of roof drains for the collectionof a stormwater from the building and storm inlet for collectionofstormwater outside of the building and piping for runoffcollection to a proposed underground storage system. Theproposed stormwater system will discharge to an existingroadside inlet via a proposed stormwater control structure. Thestormwater system has been designed to meet all St Johns RiverWater Management District and Atlantic Beach stormwaterdesign standards.By Toni Gindlesperger at 9:23 am, Jun 03, 2022 Section II:Project Information FLOOD HAZARD INFORMATIONsa ns »w*tro*ocuMDirco»B*»i'wauwR>)> rwu nutauatxftmEi'.fOKVATHWCERCTI.DOfIhlSkW^DSUrPMtnfiGDOa'MDmm'iAftEMSOnAtLABlfWDiG.Mi.fWMATATHTrp:.//MSC.fEMA.OOVWithort Bt» Rood Bmtto* (BfflWWiBFEorDtpth;.^-^^^. i£ i.NOTES TO USERS•KSt99S Rwuf»n«>*w0.2% AJWUII Ckanw Rood Htzant, Aft•H«l««uld«»Hk»d1Uimtwdepth tets th*n one footw *rtU> drdntjetreat Ollecthu out tqutnmBe .'-•*.WmCond?)nsH*fl*ualt3un« Hood Hautd .'.-•-•Area »tlh R«hced Oood Krii do* ta lentSttHotu^-Ifi&'SfftiH AnaofMintaiinoodHaun)/^'S ' "tl A/M»(Umltttnntn(dRoodH»aid-.L,i>——— Channel. CAtrt.ot Slum Snm,s ,-..„-. ^»^^-r"- CrossS*ctknBaittHt*nnwlChanc«—'"• WateiSirfKeBmUond>--•CowHITianitct...CouWTcnsectBttdiftt- PririifeBatriiKtt/dropEiphic FeatureBase Rnod Bwation Une (BFE)" Unmet StudyhrirfcUonBouwlTr3aS££!^.^^.^.,; N•*^WP|nt*w.t*mn<hlIWBfUodOTtoWnt'S'.^^.'SJ^nMhC»WfLUW^<0i Inch-500 feet0 250 500 7M 1,000_?!!.,0 125 250PANEL LOCATORss. awo»mtoNATIONAL FLOOD IMSURANCE PROGRAMDUVALCOUHTY, ^..ittitw.^?RJ?^. 'A'^8S^—i 409 » 675 ^^^KUMBO) PATO. SUfTU'§NOVEMBDt 2,2018 68^ 1 ^ \L-^-- i\i r''f^^ !f V^I^-V^'" .-^r^S^^^'^^^^ ^H^HN"S < .--•-.Details x s: + ReaiEstaf*: ^c~;S;ncc Owixr: GK 1-OLOING 3ROUP U.C AddrcM: <2 EAST COAST OR Zip Code 32233 Transaction Price: $500000 TransacUon Year ;018 Acres: 0.57 Book-Page: iS5S800~s<; Mappamt 9421 Legal Descriptions: 05-Q6& f- -2S-29E ATLAKTIC SEAtril.OT3I3.5BUa Flood Zone: 7.C -r\: ;. A3hSit»: EDAlweb NOT D3TSESSEO Evacuation Zone: Z-r^I: Planning Oistricc 7 Noise Zone: !^A APZ: ?.A 10 341 '3431;n % 347 323 '3331 i»35; o 1s \'339 Real Estate O^ner: Address:Citv: Zic Code: Acres: ^ev-f mor^-- iv^(v'- K s::f5T25 1330GfS HOLDING 5ROUP LLC4; EAST COAST DRATUNTiC BEACH32233 0.37 FSW. Sr.tV'.S -AhCTT1"5 \ —-~~' Section III:Drainage Basin Calculations DESCRIPTION: Pre Development Drainage Basin NODE NAME: Pre Basin 1 Acres Land Cover Soil Type SCS CN %Weight % 0.29 Lawn Area < 50% coverage A 68 76.3% 51.9 0.09 Buildings A 98 23.7% 23.2 NWL 100 Semi Impervious 75 100.0% 0.38 OK 75 Dist. (ft)Type of Flow Time (min.) 100 Sheet Flow 10.00 Shallow Concentrated Flow Channel Flow 100 100 Tc = 10 min. or 0.17 hrs. Weighted SCS CN = 0.38 acresArea = Ahearn Mixed Use Development CURVE NUMBER & TIME OF CONCENTRATION PRE-DEVELOPMENT DRAINAGE AREAS Curve Number Time of Concentration DESCRIPTION: Post Development Drainage Basin NODE NAME: Post Basin 1 Acres Land Cover Soil Type SCS CN %Weight % Lawn Area-Good XX 0.238 Building Area 98 62.6% 61.4 0.022 Sidewalk Area A 98 5.8% 5.7 0.002 Bike Racks 100 0.5% 0.5 0.118 Semi Impervious A 75 31.1% 23.3 100.0% 0.380 OK 91 Dist. (ft)Type of Flow Time (min.) Sheet Flow Shallow Concentrated Flow Channel Flow Tc = 10 min. or 0.17 hrs. Weighted SCS CN = Time of Concentration Ahearn Mixed Use Development CURVE NUMBER & TIME OF CONCENTRATION POST-DEVELOPMENT DRAINAGE AREAS Area =0.38 acres Curve Number Impervious Impervious Weighted Drainage Area Acreage C Percent %Area (Ac)C Lawn Area 0.00 0.25 0.0 0.0% 0.00 0.00 Impervious Area 0.26 0.98 100.0 68.6% 0.26 0.67 NWL 0.00 1.00 100.0 0.5% 0.00 0.01 Semi-Impervious 0.12 0.75 50.0 30.9% 0.00 0.23 Total 0.38 100.00% 0.26 0.91 0.5" Over Entire Site:(Total Area x 0.5")/(12"/ft) =0.02 Ac-ft Or Or 1.25" Over Impervious Area:(Total Impervious Area)(1.25")/(12"/ft) = 0.03 Ac-ft 0.03 Ac-ft From Pond Configuration:6.39 Feet SAY 7.30 Weir Elevation = Ahearn Mixed Use Development TREATMENT VOLUME CALCULATIONS Dry On-Line System Weighted C Treatment Volume Required Elev. Area VolGravel9.000.0800.078 40% Voids8.170.0800.051Stormtech8.000.0800.0517.000.0806.000.080BOT4.500.0000.00Ahearn Mixed Use DevelopmentPOND CONFIGURATIONStormtech Retention System Project: Chamber Model - SC-740 Units -Imperial Number of chambers -23 Voids in the stone (porosity) - 40 % Base of Stone Elevation -4.50 ft Amount of Stone Above Chambers - 6 in Amount of Stone Below Chambers -6 in 6 Area of system -1120 sf Min. Area - Height of System Incremental Single Chamber Incremental Total Chamber Incremental Stone Incremental Ch & St Cumulative Chamber Elevation (inches) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (cubic feet) (feet) 42 0.00 0.00 37.33 37.33 2202.12 8.00 41 0.00 0.00 37.33 37.33 2164.79 7.92 40 0.00 0.00 37.33 37.33 2127.45 7.83 39 0.00 0.00 37.33 37.33 2090.12 7.75 38 0.00 0.00 37.33 37.33 2052.79 7.67 37 0.00 0.00 37.33 37.33 2015.45 7.58 36 0.05 1.26 36.83 38.09 1978.12 7.50 35 0.16 3.75 35.83 39.58 1940.03 7.42 34 0.28 6.48 34.74 41.22 1900.45 7.33 33 0.60 13.89 31.78 45.67 1859.22 7.25 32 0.80 18.44 29.96 48.40 1813.56 7.17 31 0.95 21.87 28.59 50.45 1765.16 7.08 30 1.07 24.71 27.45 52.16 1714.71 7.00 29 1.18 27.15 26.47 53.62 1662.54 6.92 28 1.27 29.11 25.69 54.80 1608.92 6.83 27 1.36 31.17 24.87 56.03 1554.12 6.75 26 1.45 33.44 23.96 57.40 1498.09 6.67 25 1.52 35.07 23.31 58.37 1440.69 6.58 24 1.58 36.39 22.78 59.17 1382.31 6.50 23 1.64 37.77 22.22 60.00 1323.14 6.42 22 1.70 39.09 21.70 60.79 1263.15 6.33 21 1.75 40.32 21.21 61.52 1202.36 6.25 20 1.80 41.46 20.75 62.21 1140.84 6.17 19 1.85 42.66 20.27 62.93 1078.63 6.08 18 1.89 43.54 19.92 63.46 1015.69 6.00 17 1.93 44.48 19.54 64.02 952.23 5.92 16 1.97 45.42 19.16 64.59 888.21 5.83 15 2.01 46.23 18.84 65.07 823.62 5.75 14 2.04 47.03 18.52 65.55 758.55 5.67 13 2.07 47.72 18.24 65.97 693.00 5.58 12 2.10 48.41 17.97 66.38 627.03 5.50 11 2.13 49.03 17.72 66.75 560.65 5.42 10 2.15 49.54 17.52 67.06 493.90 5.33 9 2.18 50.07 17.30 67.38 426.84 5.25 8 2.20 50.56 17.11 67.67 359.47 5.17 7 2.21 50.77 17.03 67.79 291.79 5.08 6 0.00 0.00 37.33 37.33 224.00 5.00 5 0.00 0.00 37.33 37.33 186.67 4.92 4 0.00 0.00 37.33 37.33 149.33 4.83 3 0.00 0.00 37.33 37.33 112.00 4.75 2 0.00 0.00 37.33 37.33 74.67 4.67 1 0.00 0.00 37.33 37.33 37.33 4.58 StormTech SC-740 Cumulative Storage Volumes 777 sf min. area 4.8 in. 5.8 in. 6.5 in. 9.25 in. 11.0 in.Mean 3-yr 5-yr 25-yr 100-yrPre Outfall0.77 1.04 1.24 2.21 2.56Post Outfall0.69 1.02 1.22 2.08 2.61BOT Mean 3-yr 5-yr 25-yr 100-yr TOBPond4.50 8.13 8.37 8.51 8.89 8.98 9.00Ahearn Mixed Use DevelopmentDISCHARGE AND STAGE SUMMARYPeak Discharge Comparisons (cfs)Peak Stages (ft) Section IV:ICPR Report Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PEJune 1, 2022AHEARN MIXED USENodal DiagramNodesA Stage/AreaV Stage/VolumeT Time/StageM ManholeBasinsO Overland FlowU SCS Unit CNS SBUH CNY SCS Unit GAZ SBUH GALinksP PipeW WeirC ChannelD Drop StructureB BridgeR Rating CurveH BreachE PercolationF FilterX Exfil TrenchV:Storm Tech PondU:POST BASIN 1T:PRE OUTFALLU:Pre Basin 1T:POST OUTFALLD:Post Control AHEARN MIXED USE Input Report ========================================================================================== ==== Basins ============================================================================== ========================================================================================== Name: POST BASIN 1 Node: Storm Tech Pond Status: Onsite Group: BASE Type: SCS Unit Hydrograph CN Unit Hydrograph: Uh484 Peaking Factor: 484.0 Rainfall File: Flmod Storm Duration(hrs): 0.00 Rainfall Amount(in): 0.000 Time of Conc(min): 10.00 Area(ac): 0.380 Time Shift(hrs): 0.00 Curve Number: 91.00 Max Allowable Q(cfs): 999999.000 DCIA(%): 0.00 ---------------------------------------------------------------------------------------------------- Name: Pre Basin 1 Node: PRE OUTFALL Status: Onsite Group: BASE Type: SCS Unit Hydrograph CN Unit Hydrograph: Uh484 Peaking Factor: 484.0 Rainfall File: Flmod Storm Duration(hrs): 0.00 Rainfall Amount(in): 0.000 Time of Conc(min): 10.00 Area(ac): 0.380 Time Shift(hrs): 0.00 Curve Number: 75.00 Max Allowable Q(cfs): 999999.000 DCIA(%): 0.00 ========================================================================================== ==== Nodes =============================================================================== ========================================================================================== Name: POST OUTFALL Base Flow(cfs): 0.000 Init Stage(ft): 4.000 Group: BASE Warn Stage(ft): 9.000 Type: Time/Stage Time(hrs) Stage(ft) --------------- --------------- 0.00 4.000 12.00 6.000 24.00 4.000 ------------------------------------------------------------------------------------------ Name: PRE OUTFALL Base Flow(cfs): 0.000 Init Stage(ft): 4.000 Group: BASE Warn Stage(ft): 9.000 Type: Time/Stage Time(hrs) Stage(ft) --------------- --------------- 0.00 4.000 12.00 6.000 24.00 4.000 ------------------------------------------------------------------------------------------ Name: Storm Tech Pond Base Flow(cfs): 0.000 Init Stage(ft): 4.500 Group: BASE Warn Stage(ft): 9.000 Type: Stage/Volume Stage(ft) Volume(af) --------------- --------------- 4.500 0.0000 8.000 0.0510 9.000 0.0780 ========================================================================================== ==== Cross Sections ====================================================================== ========================================================================================== Name: Group: BASE Encroachment: No Station(ft) Elevation(ft) Manning's N --------------- --------------- --------------- BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 1 of 5 AHEARN MIXED USE Input Report ========================================================================================== ==== Drop Structures ===================================================================== ========================================================================================== Name: Post Control From Node: Storm Tech Pond Length(ft): 96.00 Group: BASE To Node: POST OUTFALL Count: 1 UPSTREAM DOWNSTREAM Friction Equation: Automatic Geometry: Circular Circular Solution Algorithm: Automatic Span(in): 15.00 15.00 Flow: Both Rise(in): 15.00 15.00 Entrance Loss Coef: 0.000 Invert(ft): 7.300 7.010 Exit Loss Coef: 0.000 Manning's N: 0.013000 0.013000 Outlet Ctrl Spec: Use dc or tw Top Clip(in): 0.000 0.000 Inlet Ctrl Spec: Use dc Bot Clip(in): 0.000 0.000 Solution Incs: 10 Upstream FHWA Inlet Edge Description: Circular Concrete: Square edge w/ headwall Downstream FHWA Inlet Edge Description: Circular CMP: Mitered to slope *** Weir 1 of 2 for Drop Structure Post Control *** TABLE Count: 1 Bottom Clip(in): 0.000 Type: Vertical: Mavis Top Clip(in): 0.000 Flow: Both Weir Disc Coef: 3.200 Geometry: Rectangular Orifice Disc Coef: 0.600 Span(in): 4.00 Invert(ft): 7.300 Rise(in): 9999.00 Control Elev(ft): 7.300 *** Weir 2 of 2 for Drop Structure Post Control *** TABLE Count: 1 Bottom Clip(in): 0.000 Type: Vertical: Mavis Top Clip(in): 0.000 Flow: Both Weir Disc Coef: 3.200 Geometry: Rectangular Orifice Disc Coef: 0.600 Span(in): 32.00 Invert(ft): 8.800 Rise(in): 9999.00 Control Elev(ft): 8.800 ========================================================================================== ==== Hydrology Simulations =============================================================== ========================================================================================== Name: 100yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\100yr-24hr.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Flmod Rainfall Amount(in): 11.00 Time(hrs) Print Inc(min) --------------- --------------- 24.000 15.00 48.000 30.00 ---------------------------------------------------------------------------------------------------- Name: 10yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\10yr-24hr.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Flmod Rainfall Amount(in): 7.50 Time(hrs) Print Inc(min) --------------- --------------- 24.000 15.00 48.000 30.00 ---------------------------------------------------------------------------------------------------- Name: 25yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\25yr-24hr.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Flmod Rainfall Amount(in): 9.50 BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 2 of 5 AHEARN MIXED USE Input Report Time(hrs) Print Inc(min) --------------- --------------- 24.000 15.00 48.000 30.00 ---------------------------------------------------------------------------------------------------- Name: 3yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\3yr-24hr.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Flmod Rainfall Amount(in): 5.80 Time(hrs) Print Inc(min) --------------- --------------- 24.000 15.00 48.000 30.00 ---------------------------------------------------------------------------------------------------- Name: 5yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\5yr-24hr.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Flmod Rainfall Amount(in): 6.50 Time(hrs) Print Inc(min) --------------- --------------- 24.000 15.00 48.000 30.00 ---------------------------------------------------------------------------------------------------- Name: MA24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\MA24hr.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Flmod Rainfall Amount(in): 4.80 Time(hrs) Print Inc(min) --------------- --------------- 24.000 15.00 48.000 30.00 ========================================================================================== ==== Routing Simulations ================================================================= ========================================================================================== Name: 100yr-24hr Hydrology Sim: 100yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\100yr-24hr.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 Start Time(hrs): 0.000 End Time(hrs): 48.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 60.000 15.000 Group Run --------------- ----- BASE Yes ---------------------------------------------------------------------------------------------------- Name: 10yr-24hr Hydrology Sim: 10yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\10yr-24hr.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 3 of 5 AHEARN MIXED USE Input Report Start Time(hrs): 0.000 End Time(hrs): 48.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 60.000 15.000 Group Run --------------- ----- BASE Yes ---------------------------------------------------------------------------------------------------- Name: 25yr-24hr Hydrology Sim: 25yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\25yr-24hr.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 Start Time(hrs): 0.000 End Time(hrs): 48.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 60.000 15.000 Group Run --------------- ----- BASE Yes ---------------------------------------------------------------------------------------------------- Name: 3yr-24hr Hydrology Sim: 3yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\3yr-24hr.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 Start Time(hrs): 0.000 End Time(hrs): 48.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 60.000 15.000 Group Run --------------- ----- BASE Yes ---------------------------------------------------------------------------------------------------- Name: 5yr-24hr Hydrology Sim: 5yr-24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\5yr-24hr.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 Start Time(hrs): 0.000 End Time(hrs): 48.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 60.000 15.000 Group Run --------------- ----- BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 4 of 5 AHEARN MIXED USE Input Report BASE Yes ---------------------------------------------------------------------------------------------------- Name: MA24hr Hydrology Sim: MA24hr Filename: P:\Engineering\PROJECTS\ASH PROPERTIES\18-0105 Victoria's Place\5-Civil\Calcs\ICPR\MA24hr.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 Start Time(hrs): 0.000 End Time(hrs): 48.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 60.000 15.000 Group Run --------------- ----- BASE Yes BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 5 of 5 AHEARN MIXED USE Basin Summary Basin Name: POST BASIN 1 Group Name: BASE Simulation: 100yr-24hr Node Name: Storm Tech Pond Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 11.000 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.001 Curve Number: 91.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 2.99 Runoff Volume (in): 9.883 Runoff Volume (ft3): 13633 -------------------------------------------------------------------------------- Basin Name: Pre Basin 1 Group Name: BASE Simulation: 100yr-24hr Node Name: PRE OUTFALL Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 11.000 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.000 Curve Number: 75.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 2.58 Runoff Volume (in): 7.803 Runoff Volume (ft3): 10763 -------------------------------------------------------------------------------- Basin Name: POST BASIN 1 Group Name: BASE Simulation: 10yr-24hr Node Name: Storm Tech Pond Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 7.500 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.001 Curve Number: 91.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 1.99 Runoff Volume (in): 6.423 Runoff Volume (ft3): 8859 BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 1 of 5 AHEARN MIXED USE Basin Summary -------------------------------------------------------------------------------- Basin Name: Pre Basin 1 Group Name: BASE Simulation: 10yr-24hr Node Name: PRE OUTFALL Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 7.500 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.000 Curve Number: 75.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 1.55 Runoff Volume (in): 4.587 Runoff Volume (ft3): 6327 -------------------------------------------------------------------------------- Basin Name: POST BASIN 1 Group Name: BASE Simulation: 25yr-24hr Node Name: Storm Tech Pond Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 9.500 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.001 Curve Number: 91.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 2.56 Runoff Volume (in): 8.397 Runoff Volume (ft3): 11583 -------------------------------------------------------------------------------- Basin Name: Pre Basin 1 Group Name: BASE Simulation: 25yr-24hr Node Name: PRE OUTFALL Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 9.500 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.000 Curve Number: 75.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 2.14 BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 2 of 5 AHEARN MIXED USE Basin Summary Runoff Volume (in): 6.405 Runoff Volume (ft3): 8835 -------------------------------------------------------------------------------- Basin Name: POST BASIN 1 Group Name: BASE Simulation: 3yr-24hr Node Name: Storm Tech Pond Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 5.800 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.001 Curve Number: 91.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 1.50 Runoff Volume (in): 4.755 Runoff Volume (ft3): 6559 -------------------------------------------------------------------------------- Basin Name: Pre Basin 1 Group Name: BASE Simulation: 3yr-24hr Node Name: PRE OUTFALL Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 5.800 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.000 Curve Number: 75.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 1.06 Runoff Volume (in): 3.108 Runoff Volume (ft3): 4287 -------------------------------------------------------------------------------- Basin Name: POST BASIN 1 Group Name: BASE Simulation: 5yr-24hr Node Name: Storm Tech Pond Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 6.500 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.001 Curve Number: 91.000 DCIA (%): 0.000 BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 3 of 5 AHEARN MIXED USE Basin Summary Time Max (hrs): 12.02 Flow Max (cfs): 1.71 Runoff Volume (in): 5.440 Runoff Volume (ft3): 7504 -------------------------------------------------------------------------------- Basin Name: Pre Basin 1 Group Name: BASE Simulation: 5yr-24hr Node Name: PRE OUTFALL Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 6.500 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.000 Curve Number: 75.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 1.26 Runoff Volume (in): 3.707 Runoff Volume (ft3): 5114 -------------------------------------------------------------------------------- Basin Name: POST BASIN 1 Group Name: BASE Simulation: MA24hr Node Name: Storm Tech Pond Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 4.800 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 Vol of Unit Hyd (in): 1.001 Curve Number: 91.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 1.21 Runoff Volume (in): 3.783 Runoff Volume (ft3): 5218 -------------------------------------------------------------------------------- Basin Name: Pre Basin 1 Group Name: BASE Simulation: MA24hr Node Name: PRE OUTFALL Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 1.33 Comp Time Inc (min): 1.33 Rainfall File: Flmod Rainfall Amount (in): 4.800 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 10.00 Time Shift (hrs): 0.00 Area (ac): 0.380 BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 4 of 5 AHEARN MIXED USE Basin Summary Vol of Unit Hyd (in): 1.000 Curve Number: 75.000 DCIA (%): 0.000 Time Max (hrs): 12.02 Flow Max (cfs): 0.78 Runoff Volume (in): 2.285 Runoff Volume (ft3): 3152 BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PE June 1, 2022 Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 5 of 5 AHEARN MIXED USENode Min / Max Report Max Time Max Warning Max Delta Max Surf Max Time Max Max Time Max Name Group Simulation Stage Stage Stage Stage Area Inflow Inflow Outflow Outflow hrs ft ft ft ft2 hrs cfs hrs cfs POST OUTFALL BASE 100yr-24hr 12.00 6.00 9.00 0.0028 0 12.06 2.61 0.00 0.00 POST OUTFALL BASE 10yr-24hr 12.00 6.00 9.00 0.0028 0 12.12 1.48 0.00 0.00 POST OUTFALL BASE 25yr-24hr 12.00 6.00 9.00 0.0028 0 12.09 2.08 0.00 0.00 POST OUTFALL BASE 3yr-24hr 12.00 6.00 9.00 0.0028 0 12.15 1.02 0.00 0.00 POST OUTFALL BASE 5yr-24hr 12.00 6.00 9.00 0.0028 0 12.14 1.22 0.00 0.00 POST OUTFALL BASE MA24hr 12.00 6.00 9.00 0.0028 0 12.21 0.69 0.00 0.00 PRE OUTFALL BASE 100yr-24hr 12.00 6.00 9.00 0.0028 0 12.00 2.56 0.00 0.00 PRE OUTFALL BASE 10yr-24hr 12.00 6.00 9.00 0.0028 0 12.00 1.53 0.00 0.00 PRE OUTFALL BASE 25yr-24hr 12.00 6.00 9.00 0.0028 0 12.00 2.12 0.00 0.00 PRE OUTFALL BASE 3yr-24hr 12.00 6.00 9.00 0.0028 0 12.00 1.04 0.00 0.00 PRE OUTFALL BASE 5yr-24hr 12.00 6.00 9.00 0.0028 0 12.00 1.24 0.00 0.00 PRE OUTFALL BASE MA24hr 12.00 6.00 9.00 0.0028 0 12.00 0.77 0.00 0.00Storm Tech Pond BASE 100yr-24hr 12.06 8.98 9.00 0.0050 1437 12.00 2.98 12.06 2.61Storm Tech Pond BASE 10yr-24hr 12.12 8.67 9.00 -0.0050 1268 12.00 1.99 12.12 1.48Storm Tech Pond BASE 25yr-24hr 12.09 8.89 9.00 0.0050 1388 12.00 2.56 12.09 2.08Storm Tech Pond BASE 3yr-24hr 12.15 8.37 9.00 0.0050 1108 12.00 1.50 12.15 1.02Storm Tech Pond BASE 5yr-24hr 12.14 8.51 9.00 0.0050 1181 12.00 1.70 12.14 1.22Storm Tech Pond BASE MA24hr 12.21 8.13 9.00 0.0050 977 12.00 1.21 12.21 0.69BAKER DESIGN BUILD #18-0105 Kyle F. Davis, PEJune 1, 2022Interconnected Channel and Pond Routing Model (ICPR) ©2002 Streamline Technologies, Inc.Page 1 of 1