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Stormwater Management Plan 04-17-2013 Preliminary STORMWATER MANAGEMENT PLAN AND CALCULATIONS FOR The Preserve at Rice Lake Chanhassen, MN April 17, 2013 Prepared By: Kallio Engineering Inc. 10775 Poppitz Lane Chaska, MN 55318 612-418-6828 I hereby certify that this plan, report, or specification was prepared by me or under my direct supervision and that I am a duly licensed engineer under the laws of the State of Minnesota. ________________________ License No. 26909 Curtiss J. Kallio STORMWATER MANAGEMENT PLAN AND CALCULATIONS Introduction This Preliminary Stormwater Management Plan addresses how this proposed project will meet the surface water management requirements of the City of Chanhassen as discussed below. This report is considered preliminary because changes ar e anticipated through city reviews. This site is very unique due to the topography a nd natural areas the developer is trying to preserve. This topography makes it difficult to collect and treat stormwater using only conventional ponding methods, and some alternative treatment methods will be discussed. Through city reviews, we are confident that effective stormwater treatment meeting city requirements will be achieved. Requirements The City of Chanhassen Surface Water Manage ment requirements are summarized as follows: 1. Peak discharge rates: No increase in peak discharge rate may result from the proposed project for the 1- or 2-year storm, the 10-year storm and the 100-year storm event. Variances may be allowed if computations can be pr ovided which demonstrate no adverse downstream effects will result from the proposed system. 2. Water Quality Standard: Water quality treatment consistent with NURP criteria (90 percent removal of TSS and 60 percent removal of TP for a standard NURP particle size distribution). 3. Minor Drainage Systems: Storm sewer conveyance system shall be designed for a 10 year storm and be evaluated for a 100 year storm event. 4. Pond Outlet Structure : Designs shall provide rate controls that limit post-project rates to not exceed existing rates for 1- or 2-year, 10 -year, 100-year events and 100-year/10-day snowmelt. Maximum inlet pipe velocity of 0.5 fps. 5. Emergency Overflow Spillway : Designed to convey storm flows for up to a 10.0-inch storm event shall be analyzed to ensu re the emergency overflow spillway will function as designed. Existing Site The 13.2 acre site currently consists of 3.6 acres of wetland and 9.6 acres of combined grass and tree area. There is no existing impervious area on the site. All of the runoff from this site ultimately drains to Rice Lake. The eastern 1.2 acres drain to wetland which then drains to a ditch at the northeast corn er of the site, while the remaining 12.0 acres drains to a ditch which passes through a cu lvert under the driveway to the north, and then drains to Rice Lake. This site also has 2.3 acres draining to it from MnDOT Right of Way, 1.3 acres draining to it from the wetland and development to the west, and 9.82 acr es draining to the wetland south of Tigua Lane from the north. This off-site or flow through dr ainage can not be easily separated from the site runoff, so it will modeled with the site runoff. The site is well vegetated and there are no signs of erosion or problem areas. The majority of the soils on the site are the Lest er and Kilkenny series. These soils are formed on glacial till and moraines. They have moderate pe rmeability and would be in the hydrologic soil group of B according to the county soils data. Proposed Improvements Proposed improvements to this site include subdivi ding the land into 16 lots. To accomplish this, 1300 feet of roadway and a cul de sac will have to be constructed. The road way has a curb back to back width that varies from 28 feet to 31 feet. The average lot size is 10,890 square feet. For calculation purposes, each lot was assumed to have 3500 sq. ft. of impervious surface. The 3500 sq . ft. is comprised of 2500 sq. ft. for house and landscaping and 1000 sq. ft. for driveway and walks. The majority of the side yard high points are near the front of the houses, so most of the imperv ious surface per lot is in the subcatchment to the rear of the house. The new impervious surface for this site is 2.47 acres. The impervious surfaces were assigned a curve number of 98. The remaining yards and open space was assigned a curve number of 61. In addition to the proposed s ite impervious areas, the post-de velopment HydroCAD model includes an additional 2.52 acres of impervious su rface from off-site and flow through areas. To meet pre-development runoff rates and water qua lity standards, wet detention stormwater ponding and bioretention areas are proposed. MODELING RESULTS Peak Discharge Rates The pre-development and post-development r unoff calculations and were performed using HydroCAD software which utilizes SCS TR-20 methodologies. All runoff calculations were performed using a Type II 24-hour rainfall distribution with a 2-year rainfall of 2.8 inches, a 10-year rainfall of 4.2 inch es, and a 100-year rainfall of 6.0 inches. Curve numbers were taken from the table using thei r respective soil group. The 10-day snowmelt calculations were performed using an AMC Condition of 4. The basin areas with their respective impervious ar ea, curve numbers, and time of concentration can be found in the HydroCAD results at the back of this report. Tables summarizing the HydroCAD inputs are also attached. The pre-development and post development runoff cal culations are attached, but summarized below: Storm Pre-Dev. Post-Dev. 2 year 0.9 cfs 1.7 cfs 10 year 4.6 cfs 5.8 cfs 100 year 11.9 cfs 11.1 cfs As shown above, the post-development peak dischar ges are larger than th e pre-development peak discharges for the 2-year and 10-year storms, but sma ller for the 100-year storm. The reason for this is because most of the site has walkout lots and the rear yard drainage can not be collected and routed through the detention pond due to the elevations of the site. Even if the pond had a smaller outlet, the peak discharges would not decrease enough to meet pre-development conditions. The city code allows variances to these criteria if it is demonstrated that there will be no adverse downstream impacts as a result. The downstre am impacts will be discussed further below. Downstream Assessment/Impacts There are four discharge points shown in the HydroCAD model. Discharges 1 through 3 all drain to a ditch on the north side of the property which flows to an 18” CMP under the driveway to the north and then flows to Rice Lake. From a downstream im pact perspective, Discharges 1 through 3 can be combined to Discharge 1-3. Discharge 4 drains to a wetland to the east and then flows through a ditch to Rice Lake. The individual discharges are shown in the Pre and Post Development Discharge Table and summarized below: Discharge 2-Year Storm (cfs) 10-Year Storm (cfs) 100-Year Storm (cfs) Point Pre Post Change Pre Post Change Pre Post Change D1-3 0.8 1.1 0.3 4.1 3.7 -0.4 10.1 5.9 -4.2 D4 0.1 0.6 0.5 0.9 2.5 1.6 2.4 5.6 3.2 TOTAL 0.9 1.7 0.8 4.6 5.8 1.2 11.9 11.1 -0.8 As shown above, the discharges to D1-3 are nearly equal to or less than pre-development conditions. The discharges to D4 have increased for all storm ev ents. When modeling this site, it was determined that culvert under the driveway was more restrictive than the ditch in Discharge 4. For this reason, the pond is proposed to outlet to the east even thou gh much of the pre-development runoff drained to the north. Another reason for outleting the pond to the east was to provide adequate separation from the pond inlet to the pond outlet. Bioretention Option To mitigate the smaller storm events, bioretention ar eas could be placed in the rear yards to filtrate the runoff before it discharges from the site. The bi oretention areas are not cu rrently included in the calculations, but shown in the preliminary plans. Their use would be dependent on the city accepting them as an alternative stormwater treatment. Thei r final location would be dependent on maintenance access and desired benefit. The Carver County Water Management District h as studied the use of bioretention areas and has developed standard designs that have proven volume reduction and water quality benefits. It is understood that this project is not within the Carver County WMO district. Water Quality Water quality computations for phosphorous (TP) and total suspend solid s (TSS) removal were computed using P8 Software. The wet detention po nds were analyzed with the following results: As shown above, the TSS removal exceeds the requireme nt of 90% for the east pond, but is less than the requirement for the west pond, while the TP removal is less than the required removal of 60% for both the east and west ponds. It should be noted NURP water quality methods are not typically meant for modeling small watersheds such as the west pond. As previously mentioned, bioretention areas ha ve proven TSS and TP removal benefits. If the bioretention areas are allowed as supplement to water qualit y, it is anticipated that the city criteria could be met. Storm Sewer Design The storm sewer system was analyzed using Eagl epoint software and rational method for computing runoff at each inlet. The storm sewer was designed for a 10 year storm event. Storm sewer outlets velocities were reduced to prevent erosion. Riprap and geotextile filter fabric will be used at all storm sewer outlets. See the attached storm sewer design summary sheets for details. Pond Outlet The east pond outlet was designed with a minimum 12 ” RCP outlet. The pond has capacity to allow for an 8” outlet, but an 8” outlet pipe is discourag ed due to potential plugging. The city standard detail does not allow for weir walls which could inco rporate a low flow outlet. Both scenarios were run in the model and there was minimal difference in the results. The proposed outlet follows city detail 3109. The velocity through the pond inlet pipe was limited to 0.5 fps for the 1-year storm event. Variable East Pond (% reduction) West Pond (% reduction) P0% P10% 84.4 52.8 P30% 93 72.5 P50% 96.9 87.9 P80% 99.7 98.6 TSS 94.7 82.1 TP 58.2 47.1 TKN 48.4 39.7 CU 61.8 55.7 PB 82.5 72.5 ZN 9.3 8 HC 82.5 72.5 An 8” outlet is proposed for the west pond due to the small drainage area. It is anticipated that an alternative design will used in conjunction with a stag ed design for this pond so city detail 3109 is not shown in the plans. A pond emergency overflow will be provided with permanent protection in the final design. Attachments 1. Impervious Area Summary Table 2. Pre and Post Development Discharge Table 3. Permanent Pool Volume Calculations 4. Drainage Area and Curve Number Table 5. Post Development Time of Concentration Input Table 6. Storm sewer design summary sheets (1-6) 7. 2-yr, 10-yr, and 100-yr Pre-Development HydroCAD report 8. 2-yr, 10-yr, and 100-yr Post-Development HydroCAD report 9. 10-day snowmelt HydroCAD report for East Pond Outlet 10. Pre-Development Drainage Area Map 11. Post-Development Drainage Area Map 12. Storm Sewer Drainage Area Map Impervious Area Summary Table PRESERVE AT RICE LAK E Impervious Area Summary Basis for Impervious Areas:Proposed Houses2500.0sq. ft Proposed Drives1000sq. ft.StreetsArea computed in AutoCAD WalksArea computed in AutoCAD HydroCADNo. ofNo. of BuildingDriveStreetsWalksTotal NewOtherExistingTotalComments CatchmentBuildingsDrivesImp. (ac)Imp. (ac)Imp. (ac)Imp. (ac)Imp. (ac)Imp. (ac)Imp. (ac)Imp. (ac)S1.15.600.320.000.000.000.320.000.000.32 S1.20.420.020.050.500.090.660.080.000.74Pond S1.3000.000.000.000.000.000.000.000.00Flow through - MnDOT R/W S1.4000.000.000.000.000.000.000.000.00 S1.5000.000.000.000.000.000.000.000.00Flow through - MnDOT R/W S1.6000.000.000.000.000.000.000.200.20Existing Buildings S1.7000.000.000.000.000.000.002.002.00Flow through - from north S2.1200.110.000.000.000.110.000.000.11 S3.10.800.050.000.000.000.050.000.000.05 S3.20.700.040.000.000.000.040.240.000.28Pond S3.31.500.090.000.000.000.090.000.000.09 S3.4000.000.000.000.000.000.000.000.00Flow through - MnDOT R/W S3.55140.290.320.520.071.200.000.001.20 S3.6000.000.000.000.000.000.000.000.00Flow through - MnDOT R/W S4.1000.000.000.000.000.000.000.000.00 S4.2000.000.000.000.000.000.000.000.00Flow through - MnDOT R/W TOTALS16160.920.371.020.162.470.322.204.99 New Impervious Surface Pre and Post Development Discharge Table PRESERVE AT RICE LAK E Pre-Development and Post-Development Discharge Summary= Increase over existing = Decrease from existing HydroCAD Results Summarized in Table Below:Discharge PointPrePostChangePrePostChangePrePostChange D10.71.00.32.63.50.95.15.60.5 D20.10.40.30.81.10.32.12.20.1 D30.20.30.11.61.0-0.64.82.2-2.6 D1-30.81.10.34.13.7-0.410.15.9-4.2 D40.10.60.50.92.51.62.45.63.2 TOTAL0.91.70.84.65.81.211.911.1-0.8 2-Year Storm (cfs)10-Year Storm (cfs)100-Year Storm (cfs) Permanent Pool Volume Calculatons PRESERVE AT RICE LAK E Permanent Pool Volume Calculations ContourArea (ac)V ol. (ac-ft)886.00.050Pond Bottom 888.00.0900.140 890.00.1300.220 892.00.1900.320 893.00.2100.200 894.00.3000.255NWL Total1.135 ContourArea (ac)V ol. (ac-ft)888.00.010Pond Bottom 890.00.0200.030 891.00.0300.025 892.00.0600.045NWL Total0.100 West Pond Permanent Pool Volume East Pond Permanent Pool Volume Drainage Area and Curve Number Table PRESERVE AT RICE LAK E Post-Development Area and Curve Number HydroCAD Inputs HydroCAD Total CatchmentAreaCNAreaCNAreaCNAreaComments S1.13.99580.32984.31 S1.20.66610.74981.40 S1.30.73610.73Flow through - MnDOT R/W S1.40.71610.71 S1.50.17610.17Flow through - MnDOT R/W S1.61.53580.20981.73Flow through - from west S1.77.82582.00989.82Flow through - from north S2.10.46610.11980.57 S3.10.61610.05980.66 S3.20.48610.28980.76 S3.31.30610.09981.39 S3.40.87610.87Flow through - MnDOT R/W S3.51.18611.20982.38 S3.60.31610.31Flow through - MnDOT R/W S4.11.05611.05 S4.20.23610.23Flow through - MnDOT R/W TOTALS22.104.9927.09 Area 1Area 2Area 3 Post Development Time of Concentration HydroCAD Input Table PRESERVE AT RICE LAK E Post-Development Time of Concentration HydroCAD Inputs Sheet Flow Mannings Shallow Concentrated Flow Velocity Surface (n)Surface Description Factor (fps)Smooth surfaces0.011Paved20.3 Fallow0.05Unpaved16.1 Cultivated: Residue<=20%0.06Grassed Waterway15.0 Cultivated: Residue>20%0.17Nearly Bare & Untilled10.0 Grass: Short0.15Cultivated Straight Rows9.0 Grass: Dense0.24Short Grass Pasture7.0 Grass: Bermuda0.41Woodland5.0 Range0.13Forest w/Heavy Litter2.5 HydroCAD CatchmentLengthSlopeManningsLengthSlopeManningsLengthSlopeVel. FactorLengthSlopeVel. Factor S1.12000.0600.201400.0307.00 S1.2500.0200.151500.020.011400.01020.30 S1.31000.1800.243800.01020.30 S1.41000.1600.201000.0107.00 S1.52000.1200.201000.0087.00 S1.62000.0800.20800.0087.00 S1.72000.0200.154000.10015.006600.00620.30 S2.11500.0900.20 S3.11600.1300.20 S3.21500.0900.20 S3.32000.0450.201800.0285.00 S3.42000.0450.242600.0467.00 S3.51600.0500.151700.01020.30 S3.6600.2200.241600.050.151700.01020.30 S4.12000.0450.24900.0205.00 S4.2600.2300.242000.0450.24900.0205.00 Sheet Flow 1 Shallow Concentrated Flow 2 Sheet Flow 2Shallow Concentrated Flow 1 Drainage Diagram for 1237 Pre-Development Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcat Reach Pond Link S1.1 S1.1 S1.2 S1.2 S1.3 S1.3 S1.4 S1.4 S2.1 S2.1 S3.1 S3.1 S3.2 S3.2 S3.3 S3.3 S4.1 S4.1 S4.2 S4.2 D TOTAL DISCHARGE D1 DISCHARGE 1 D1-3 D1-3 D2 DISCHARGE 2 D3 DISCHARGE 3 D4 DISCHARGE 4 W1.1 WETLAND W3 WETLAND Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 2 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.1: S1.1 Runoff=0.53 cfs @ 12.34 hrs, Volume=0.128 af, Depth=0.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 7.21058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"6.74000.02001.0 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 25.9600Total Subcatchment S1.1: S1.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=7.210 ac Runoff Volume=0.128 af Runoff Depth=0.21"Flow Length=600'Tc=25.9 min CN=58 0.53 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 3 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.2: S1.2 Runoff=0.09 cfs @ 12.35 hrs, Volume=0.021 af, Depth=0.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.20058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)4.0600.20000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"3.44000.08002.0 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 26.6660Total Subcatchment S1.2: S1.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.200 ac Runoff Volume=0.021 af Runoff Depth=0.21"Flow Length=660'Tc=26.6 min CN=58 0.09 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 4 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.3: S1.3 Runoff=0.49 cfs @ 12.13 hrs, Volume=0.051 af, Depth=0.35"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.53058Woods/grass comb., Good, HSG B 0.20098Paved parking & roofs 1.73063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)13.22000.08000.3 Sheet Flow, n= 0.200 P2= 2.80"2.1800.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.3280Total Subcatchment S1.3: S1.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.730 ac Runoff Volume=0.051 af Runoff Depth=0.35"Flow Length=280'Tc=15.3 min CN=63 0.49 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 5 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.4: S1.4 Runoff=2.89 cfs @ 12.27 hrs, Volume=0.370 af, Depth=0.45"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 7.82058Woods/grass comb., Good, HSG B 2.00098Paved parking & roofs 9.82066Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.22000.02000.2 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.44000.10004.7 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 7.06600.00601.6 Shallow Concentrated Flow, Paved Kv= 20.3 fps 26.61,260Total Subcatchment S1.4: S1.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)3 2 1 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=9.820 ac Runoff Volume=0.370 af Runoff Depth=0.45"Flow Length=1,260'Tc=26.6 min CN=66 2.89 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 6 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S2.1: S2.1 Runoff=0.10 cfs @ 12.24 hrs, Volume=0.021 af, Depth=0.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.20058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.42000.05000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"1.41600.07501.9 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.8360Total Subcatchment S2.1: S2.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.115 0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.200 ac Runoff Volume=0.021 af Runoff Depth=0.21"Flow Length=360'Tc=19.8 min CN=58 0.10 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 7 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.1: S3.1 Runoff=0.13 cfs @ 12.18 hrs, Volume=0.025 af, Depth=0.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.39058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)14.92000.08500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"0.6600.06701.8 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.5260Total Subcatchment S3.1: S3.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.390 ac Runoff Volume=0.025 af Runoff Depth=0.21"Flow Length=260'Tc=15.5 min CN=58 0.13 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 8 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.2: S3.2 Runoff=0.15 cfs @ 12.43 hrs, Volume=0.040 af, Depth=0.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 2.23058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)22.62000.03000.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"8.43400.01800.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 31.0540Total Subcatchment S3.2: S3.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=2.230 ac Runoff Volume=0.040 af Runoff Depth=0.21"Flow Length=540'Tc=31.0 min CN=58 0.15 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 9 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.3: S3.3 Runoff=0.06 cfs @ 12.45 hrs, Volume=0.015 af, Depth=0.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.87058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)23.42700.05000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"8.43400.01800.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 31.8610Total Subcatchment S3.3: S3.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.870 ac Runoff Volume=0.015 af Runoff Depth=0.21"Flow Length=610'Tc=31.8 min CN=58 0.06 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 10 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.1: S4.1 Runoff=0.09 cfs @ 12.27 hrs, Volume=0.021 af, Depth=0.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.18058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 21.3290Total Subcatchment S4.1: S4.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.180 ac Runoff Volume=0.021 af Runoff Depth=0.21"Flow Length=290'Tc=21.3 min CN=58 0.09 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 11 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.2: S4.2 Runoff=0.03 cfs @ 12.29 hrs, Volume=0.006 af, Depth=0.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.23061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.8600.23000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 25.1350Total Subcatchment S4.2: S4.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.230 ac Runoff Volume=0.006 af Runoff Depth=0.29"Flow Length=350'Tc=25.1 min CN=61 0.03 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 12 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D: TOTAL DISCHARGE [40] Hint: Not Described (Outflow=Inflow)Inflow Area =27.060 ac, Inflow Depth > 0.31" for 2 YR event Inflow=0.86 cfs @ 13.47 hrs, Volume=0.689 af Outflow=0.86 cfs @ 13.47 hrs, Volume=0.689 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D: TOTAL DISCHARGE Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=27.060 ac 0.86 cfs 0.86 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 13 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1: DISCHARGE 1 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =19.960 ac, Inflow Depth > 0.34" for 2 YR event Inflow=0.67 cfs @ 14.12 hrs, Volume=0.562 af Outflow=0.67 cfs @ 14.12 hrs, Volume=0.562 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1: DISCHARGE 1 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=19.960 ac 0.67 cfs 0.67 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 14 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1-3: D1-3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =25.650 ac, Inflow Depth > 0.31" for 2 YR event Inflow=0.82 cfs @ 13.65 hrs, Volume=0.662 af Outflow=0.82 cfs @ 13.65 hrs, Volume=0.662 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1-3: D1-3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=25.650 ac 0.82 cfs 0.82 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 15 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D2: DISCHARGE 2 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =1.200 ac, Inflow Depth = 0.21" for 2 YR event Inflow=0.10 cfs @ 12.24 hrs, Volume=0.021 af Outflow=0.10 cfs @ 12.24 hrs, Volume=0.021 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D2: DISCHARGE 2 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.115 0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=1.200 ac 0.10 cfs 0.10 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 16 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D3: DISCHARGE 3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =4.490 ac, Inflow Depth = 0.21" for 2 YR event Inflow=0.22 cfs @ 12.67 hrs, Volume=0.080 af Outflow=0.22 cfs @ 12.67 hrs, Volume=0.080 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D3: DISCHARGE 3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=4.490 ac 0.22 cfs 0.22 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 17 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D4: DISCHARGE 4 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =1.410 ac, Inflow Depth = 0.23" for 2 YR event Inflow=0.13 cfs @ 12.27 hrs, Volume=0.027 af Outflow=0.13 cfs @ 12.27 hrs, Volume=0.027 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D4: DISCHARGE 4 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=1.410 ac 0.13 cfs 0.13 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 18 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.1: WETLAND Inflow Area =19.960 ac, Inflow Depth = 0.34" for 2 YR event Inflow=3.77 cfs @ 12.27 hrs, Volume=0.570 af Outflow=0.67 cfs @ 14.12 hrs, Volume=0.562 af, Atten= 82%, Lag= 111.0 min Primary=0.67 cfs @ 14.12 hrs, Volume=0.562 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 888.65' @ 14.12 hrs Surf.Area= 0.440 ac Storage= 0.196 af Plug-Flow detention time= 286.9 min calculated for 0.562 af (99% of inflow)Center-of-Mass det. time= 279.1 min ( 1,216.3 - 937.1 )VolumeInvertAvail.StorageStorage Description #1888.11'5.520 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.110.290806.00.0000.0000.290 890.000.9502,211.01.1121.1128.034 892.003.7702,575.04.4085.52011.219 DeviceRoutingInvertOutlet Devices #1Primary888.10'12.0" x 20.0' long Culvert CMP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 888.08' S= 0.0010 '/' Cc= 0.900 n= 0.012 #2Primary891.23'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 0.50 Width (feet) 0.00 20.00 Primary OutFlow Max=0.67 cfs @ 14.12 hrs HW=888.65' (Free Discharge)1=Culvert (Barrel Controls 0.67 cfs @ 2.2 fps)2=Custom Weir/Orifice ( Controls 0.00 cfs)Pond W1.1: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)4 3 2 1 0 Inflow Area=19.960 ac Peak Elev=888.65'Storage=0.196 af 3.77 cfs 0.67 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Pre-Development Page 19 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W3: WETLAND Inflow Area =3.100 ac, Inflow Depth = 0.21" for 2 YR event Inflow=0.21 cfs @ 12.44 hrs, Volume=0.055 af Outflow=0.16 cfs @ 12.75 hrs, Volume=0.055 af, Atten= 22%, Lag= 18.8 min Primary=0.16 cfs @ 12.75 hrs, Volume=0.055 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 896.16' @ 12.75 hrs Surf.Area= 0.088 ac Storage= 0.004 af Plug-Flow detention time= 26.4 min calculated for 0.055 af (100% of inflow)Center-of-Mass det. time= 26.5 min ( 1,009.0 - 982.5 )VolumeInvertAvail.StorageStorage Description #1896.11'0.151 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)896.110.080222.00.0000.0000.080 897.000.280420.00.1510.1510.312 DeviceRoutingInvertOutlet Devices #1Primary896.11'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 1.89 Width (feet) 4.00 30.00 Primary OutFlow Max=0.16 cfs @ 12.75 hrs HW=896.16' (Free Discharge)1=Custom Weir/Orifice (Weir Controls 0.16 cfs @ 0.7 fps)Pond W3: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Inflow Area=3.100 ac Peak Elev=896.16'Storage=0.004 af 0.21 cfs 0.16 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 20 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.1: S1.1 Runoff=3.89 cfs @ 12.25 hrs, Volume=0.455 af, Depth=0.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 7.21058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"6.74000.02001.0 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 25.9600Total Subcatchment S1.1: S1.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)4 3 2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=7.210 ac Runoff Volume=0.455 af Runoff Depth=0.76"Flow Length=600'Tc=25.9 min CN=58 3.89 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 21 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.2: S1.2 Runoff=0.63 cfs @ 12.26 hrs, Volume=0.076 af, Depth=0.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.20058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)4.0600.20000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"3.44000.08002.0 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 26.6660Total Subcatchment S1.2: S1.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.200 ac Runoff Volume=0.076 af Runoff Depth=0.76"Flow Length=660'Tc=26.6 min CN=58 0.63 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 22 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.3: S1.3 Runoff=1.99 cfs @ 12.10 hrs, Volume=0.148 af, Depth=1.03"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.53058Woods/grass comb., Good, HSG B 0.20098Paved parking & roofs 1.73063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)13.22000.08000.3 Sheet Flow, n= 0.200 P2= 2.80"2.1800.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.3280Total Subcatchment S1.3: S1.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.730 ac Runoff Volume=0.148 af Runoff Depth=1.03"Flow Length=280'Tc=15.3 min CN=63 1.99 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 23 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.4: S1.4 Runoff=10.00 cfs @ 12.23 hrs, Volume=0.988 af, Depth=1.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 7.82058Woods/grass comb., Good, HSG B 2.00098Paved parking & roofs 9.82066Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.22000.02000.2 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.44000.10004.7 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 7.06600.00601.6 Shallow Concentrated Flow, Paved Kv= 20.3 fps 26.61,260Total Subcatchment S1.4: S1.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=9.820 ac Runoff Volume=0.988 af Runoff Depth=1.21"Flow Length=1,260'Tc=26.6 min CN=66 10.00 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 24 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S2.1: S2.1 Runoff=0.76 cfs @ 12.17 hrs, Volume=0.076 af, Depth=0.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.20058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.42000.05000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"1.41600.07501.9 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.8360Total Subcatchment S2.1: S2.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.200 ac Runoff Volume=0.076 af Runoff Depth=0.76"Flow Length=360'Tc=19.8 min CN=58 0.76 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 25 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.1: S3.1 Runoff=1.04 cfs @ 12.11 hrs, Volume=0.088 af, Depth=0.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.39058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)14.92000.08500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"0.6600.06701.8 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.5260Total Subcatchment S3.1: S3.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.390 ac Runoff Volume=0.088 af Runoff Depth=0.76"Flow Length=260'Tc=15.5 min CN=58 1.04 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 26 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.2: S3.2 Runoff=1.06 cfs @ 12.32 hrs, Volume=0.141 af, Depth=0.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 2.23058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)22.62000.03000.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"8.43400.01800.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 31.0540Total Subcatchment S3.2: S3.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=2.230 ac Runoff Volume=0.141 af Runoff Depth=0.76"Flow Length=540'Tc=31.0 min CN=58 1.06 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 27 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.3: S3.3 Runoff=0.41 cfs @ 12.33 hrs, Volume=0.055 af, Depth=0.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.87058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)23.42700.05000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"8.43400.01800.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 31.8610Total Subcatchment S3.3: S3.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.870 ac Runoff Volume=0.055 af Runoff Depth=0.76"Flow Length=610'Tc=31.8 min CN=58 0.41 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 28 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.1: S4.1 Runoff=0.72 cfs @ 12.19 hrs, Volume=0.075 af, Depth=0.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.18058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 21.3290Total Subcatchment S4.1: S4.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.180 ac Runoff Volume=0.075 af Runoff Depth=0.76"Flow Length=290'Tc=21.3 min CN=58 0.72 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 29 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.2: S4.2 Runoff=0.17 cfs @ 12.23 hrs, Volume=0.018 af, Depth=0.92"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.23061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.8600.23000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 25.1350Total Subcatchment S4.2: S4.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.230 ac Runoff Volume=0.018 af Runoff Depth=0.92"Flow Length=350'Tc=25.1 min CN=61 0.17 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 30 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D: TOTAL DISCHARGE [40] Hint: Not Described (Outflow=Inflow)Inflow Area =27.060 ac, Inflow Depth > 0.94" for 10 YR event Inflow=4.56 cfs @ 12.46 hrs, Volume=2.110 af Outflow=4.56 cfs @ 12.46 hrs, Volume=2.110 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D: TOTAL DISCHARGE Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)5 4 3 2 1 0 Inflow Area=27.060 ac 4.56 cfs 4.56 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 31 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1: DISCHARGE 1 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =19.960 ac, Inflow Depth > 1.00" for 10 YR event Inflow=2.62 cfs @ 13.25 hrs, Volume=1.658 af Outflow=2.62 cfs @ 13.25 hrs, Volume=1.658 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1: DISCHARGE 1 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Inflow Area=19.960 ac 2.62 cfs 2.62 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 32 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1-3: D1-3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =25.650 ac, Inflow Depth > 0.94" for 10 YR event Inflow=4.14 cfs @ 12.51 hrs, Volume=2.018 af Outflow=4.14 cfs @ 12.51 hrs, Volume=2.018 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1-3: D1-3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)4 3 2 1 0 Inflow Area=25.650 ac 4.14 cfs 4.14 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 33 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D2: DISCHARGE 2 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =1.200 ac, Inflow Depth = 0.76" for 10 YR event Inflow=0.76 cfs @ 12.17 hrs, Volume=0.076 af Outflow=0.76 cfs @ 12.17 hrs, Volume=0.076 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D2: DISCHARGE 2 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=1.200 ac 0.76 cfs 0.76 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 34 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D3: DISCHARGE 3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =4.490 ac, Inflow Depth = 0.76" for 10 YR event Inflow=1.61 cfs @ 12.42 hrs, Volume=0.284 af Outflow=1.61 cfs @ 12.42 hrs, Volume=0.284 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D3: DISCHARGE 3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Inflow Area=4.490 ac 1.61 cfs 1.61 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 35 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D4: DISCHARGE 4 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =1.410 ac, Inflow Depth = 0.78" for 10 YR event Inflow=0.89 cfs @ 12.20 hrs, Volume=0.092 af Outflow=0.89 cfs @ 12.20 hrs, Volume=0.092 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D4: DISCHARGE 4 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=1.410 ac 0.89 cfs 0.89 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 36 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.1: WETLAND Inflow Area =19.960 ac, Inflow Depth = 1.00" for 10 YR event Inflow=15.78 cfs @ 12.22 hrs, Volume=1.667 af Outflow=2.62 cfs @ 13.25 hrs, Volume=1.658 af, Atten= 83%, Lag= 61.7 min Primary=2.62 cfs @ 13.25 hrs, Volume=1.658 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 889.42' @ 13.25 hrs Surf.Area= 0.706 ac Storage= 0.631 af Plug-Flow detention time= 196.6 min calculated for 1.658 af (99% of inflow)Center-of-Mass det. time= 193.5 min ( 1,087.8 - 894.4 )VolumeInvertAvail.StorageStorage Description #1888.11'5.520 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.110.290806.00.0000.0000.290 890.000.9502,211.01.1121.1128.034 892.003.7702,575.04.4085.52011.219 DeviceRoutingInvertOutlet Devices #1Primary888.10'12.0" x 20.0' long Culvert CMP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 888.08' S= 0.0010 '/' Cc= 0.900 n= 0.012 #2Primary891.23'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 0.50 Width (feet) 0.00 20.00 Primary OutFlow Max=2.64 cfs @ 13.25 hrs HW=889.42' (Free Discharge)1=Culvert (Barrel Controls 2.64 cfs @ 3.4 fps)2=Custom Weir/Orifice ( Controls 0.00 cfs)Pond W1.1: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=19.960 ac Peak Elev=889.42'Storage=0.631 af 15.78 cfs 2.62 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Pre-Development Page 37 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W3: WETLAND Inflow Area =3.100 ac, Inflow Depth = 0.76" for 10 YR event Inflow=1.47 cfs @ 12.33 hrs, Volume=0.196 af Outflow=1.26 cfs @ 12.46 hrs, Volume=0.196 af, Atten= 14%, Lag= 8.2 min Primary=1.26 cfs @ 12.46 hrs, Volume=0.196 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 896.29' @ 12.46 hrs Surf.Area= 0.111 ac Storage= 0.017 af Plug-Flow detention time= 17.3 min calculated for 0.196 af (100% of inflow)Center-of-Mass det. time= 16.9 min ( 935.8 - 918.9 )VolumeInvertAvail.StorageStorage Description #1896.11'0.151 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)896.110.080222.00.0000.0000.080 897.000.280420.00.1510.1510.312 DeviceRoutingInvertOutlet Devices #1Primary896.11'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 1.89 Width (feet) 4.00 30.00 Primary OutFlow Max=1.24 cfs @ 12.46 hrs HW=896.29' (Free Discharge)1=Custom Weir/Orifice (Weir Controls 1.24 cfs @ 1.3 fps)Pond W3: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Inflow Area=3.100 ac Peak Elev=896.29'Storage=0.017 af 1.47 cfs 1.26 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 38 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.1: S1.1 Runoff=10.92 cfs @ 12.22 hrs, Volume=1.056 af, Depth=1.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 7.21058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"6.74000.02001.0 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 25.9600Total Subcatchment S1.1: S1.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=7.210 ac Runoff Volume=1.056 af Runoff Depth=1.76"Flow Length=600'Tc=25.9 min CN=58 10.92 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 39 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.2: S1.2 Runoff=1.79 cfs @ 12.23 hrs, Volume=0.176 af, Depth=1.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.20058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)4.0600.20000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"3.44000.08002.0 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 26.6660Total Subcatchment S1.2: S1.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.200 ac Runoff Volume=0.176 af Runoff Depth=1.76"Flow Length=660'Tc=26.6 min CN=58 1.79 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 40 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.3: S1.3 Runoff=4.55 cfs @ 12.09 hrs, Volume=0.314 af, Depth=2.18"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.53058Woods/grass comb., Good, HSG B 0.20098Paved parking & roofs 1.73063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)13.22000.08000.3 Sheet Flow, n= 0.200 P2= 2.80"2.1800.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.3280Total Subcatchment S1.3: S1.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)5 4 3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.730 ac Runoff Volume=0.314 af Runoff Depth=2.18"Flow Length=280'Tc=15.3 min CN=63 4.55 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 41 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.4: S1.4 Runoff=21.67 cfs @ 12.22 hrs, Volume=1.997 af, Depth=2.44"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 7.82058Woods/grass comb., Good, HSG B 2.00098Paved parking & roofs 9.82066Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.22000.02000.2 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.44000.10004.7 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 7.06600.00601.6 Shallow Concentrated Flow, Paved Kv= 20.3 fps 26.61,260Total Subcatchment S1.4: S1.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=9.820 ac Runoff Volume=1.997 af Runoff Depth=2.44"Flow Length=1,260'Tc=26.6 min CN=66 21.67 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 42 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S2.1: S2.1 Runoff=2.13 cfs @ 12.14 hrs, Volume=0.176 af, Depth=1.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.20058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.42000.05000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"1.41600.07501.9 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.8360Total Subcatchment S2.1: S2.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.200 ac Runoff Volume=0.176 af Runoff Depth=1.76"Flow Length=360'Tc=19.8 min CN=58 2.13 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 43 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.1: S3.1 Runoff=2.84 cfs @ 12.10 hrs, Volume=0.203 af, Depth=1.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.39058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)14.92000.08500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"0.6600.06701.8 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.5260Total Subcatchment S3.1: S3.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.390 ac Runoff Volume=0.203 af Runoff Depth=1.76"Flow Length=260'Tc=15.5 min CN=58 2.84 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 44 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.2: S3.2 Runoff=2.98 cfs @ 12.29 hrs, Volume=0.326 af, Depth=1.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 2.23058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)22.62000.03000.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"8.43400.01800.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 31.0540Total Subcatchment S3.2: S3.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=2.230 ac Runoff Volume=0.326 af Runoff Depth=1.76"Flow Length=540'Tc=31.0 min CN=58 2.98 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 45 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.3: S3.3 Runoff=1.14 cfs @ 12.30 hrs, Volume=0.127 af, Depth=1.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.87058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)23.42700.05000.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"8.43400.01800.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 31.8610Total Subcatchment S3.3: S3.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.870 ac Runoff Volume=0.127 af Runoff Depth=1.76"Flow Length=610'Tc=31.8 min CN=58 1.14 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 46 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.1: S4.1 Runoff=1.99 cfs @ 12.17 hrs, Volume=0.173 af, Depth=1.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.18058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 21.3290Total Subcatchment S4.1: S4.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.180 ac Runoff Volume=0.173 af Runoff Depth=1.76"Flow Length=290'Tc=21.3 min CN=58 1.99 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 47 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.2: S4.2 Runoff=0.42 cfs @ 12.21 hrs, Volume=0.038 af, Depth=2.01"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.23061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.8600.23000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 25.1350Total Subcatchment S4.2: S4.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.230 ac Runoff Volume=0.038 af Runoff Depth=2.01"Flow Length=350'Tc=25.1 min CN=61 0.42 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 48 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D: TOTAL DISCHARGE [40] Hint: Not Described (Outflow=Inflow)Inflow Area =27.060 ac, Inflow Depth > 2.03" for 100 YR event Inflow=11.90 cfs @ 12.26 hrs, Volume=4.577 af Outflow=11.90 cfs @ 12.26 hrs, Volume=4.577 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D: TOTAL DISCHARGE Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=27.060 ac 11.90 cfs 11.90 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 49 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1: DISCHARGE 1 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =19.960 ac, Inflow Depth > 2.12" for 100 YR event Inflow=5.07 cfs @ 13.26 hrs, Volume=3.533 af Outflow=5.07 cfs @ 13.26 hrs, Volume=3.533 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1: DISCHARGE 1 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)5 4 3 2 1 0 Inflow Area=19.960 ac 5.07 cfs 5.07 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 50 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1-3: D1-3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =25.650 ac, Inflow Depth > 2.04" for 100 YR event Inflow=10.06 cfs @ 12.35 hrs, Volume=4.366 af Outflow=10.06 cfs @ 12.35 hrs, Volume=4.366 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1-3: D1-3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=25.650 ac 10.06 cfs 10.06 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 51 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D2: DISCHARGE 2 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =1.200 ac, Inflow Depth = 1.76" for 100 YR event Inflow=2.13 cfs @ 12.14 hrs, Volume=0.176 af Outflow=2.13 cfs @ 12.14 hrs, Volume=0.176 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D2: DISCHARGE 2 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Inflow Area=1.200 ac 2.13 cfs 2.13 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 52 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D3: DISCHARGE 3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =4.490 ac, Inflow Depth = 1.76" for 100 YR event Inflow=4.77 cfs @ 12.32 hrs, Volume=0.657 af Outflow=4.77 cfs @ 12.32 hrs, Volume=0.657 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D3: DISCHARGE 3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)5 4 3 2 1 0 Inflow Area=4.490 ac 4.77 cfs 4.77 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 53 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D4: DISCHARGE 4 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =1.410 ac, Inflow Depth = 1.80" for 100 YR event Inflow=2.40 cfs @ 12.18 hrs, Volume=0.211 af Outflow=2.40 cfs @ 12.18 hrs, Volume=0.211 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D4: DISCHARGE 4 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Inflow Area=1.410 ac 2.40 cfs 2.40 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 54 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.1: WETLAND Inflow Area =19.960 ac, Inflow Depth = 2.13" for 100 YR event Inflow=37.33 cfs @ 12.21 hrs, Volume=3.542 af Outflow=5.07 cfs @ 13.26 hrs, Volume=3.533 af, Atten= 86%, Lag= 62.9 min Primary=5.07 cfs @ 13.26 hrs, Volume=3.533 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 890.40' @ 13.26 hrs Surf.Area= 1.363 ac Storage= 1.570 af Plug-Flow detention time= 197.5 min calculated for 3.528 af (100% of inflow)Center-of-Mass det. time= 198.9 min ( 1,069.1 - 870.2 )VolumeInvertAvail.StorageStorage Description #1888.11'5.520 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.110.290806.00.0000.0000.290 890.000.9502,211.01.1121.1128.034 892.003.7702,575.04.4085.52011.219 DeviceRoutingInvertOutlet Devices #1Primary888.10'12.0" x 20.0' long Culvert CMP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 888.08' S= 0.0010 '/' Cc= 0.900 n= 0.012 #2Primary891.23'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 0.50 Width (feet) 0.00 20.00 Primary OutFlow Max=5.07 cfs @ 13.26 hrs HW=890.40' (Free Discharge)1=Culvert (Inlet Controls 5.07 cfs @ 6.5 fps)2=Custom Weir/Orifice ( Controls 0.00 cfs)Pond W1.1: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=19.960 ac Peak Elev=890.40'Storage=1.570 af 37.33 cfs 5.07 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Pre-Development Page 55 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W3: WETLAND Inflow Area =3.100 ac, Inflow Depth = 1.76" for 100 YR event Inflow=4.12 cfs @ 12.29 hrs, Volume=0.454 af Outflow=3.81 cfs @ 12.39 hrs, Volume=0.454 af, Atten= 8%, Lag= 5.8 min Primary=3.81 cfs @ 12.39 hrs, Volume=0.454 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 896.45' @ 12.39 hrs Surf.Area= 0.142 ac Storage= 0.037 af Plug-Flow detention time= 12.4 min calculated for 0.453 af (100% of inflow)Center-of-Mass det. time= 12.5 min ( 900.9 - 888.4 )VolumeInvertAvail.StorageStorage Description #1896.11'0.151 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)896.110.080222.00.0000.0000.080 897.000.280420.00.1510.1510.312 DeviceRoutingInvertOutlet Devices #1Primary896.11'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 1.89 Width (feet) 4.00 30.00 Primary OutFlow Max=3.79 cfs @ 12.39 hrs HW=896.45' (Free Discharge)1=Custom Weir/Orifice (Weir Controls 3.79 cfs @ 1.8 fps)Pond W3: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)4 3 2 1 0 Inflow Area=3.100 ac Peak Elev=896.45'Storage=0.037 af 4.12 cfs 3.81 cfs Drainage Diagram for 1237 Post-Development Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcat Reach Pond Link S1.1 S1.1 S1.2 S1.2 S1.3 S1.3 S1.4 S1.4 S1.5 S1.5 S1.6 S1.6 S1.7 S1.7 S2.1 S2.1 S3.1 S3.1 S3.2 S3.2 S3.3 S3.3 S3.4 S3.4 S3.5 S3.5 S3.6 S3.6 S4.1 S4.1 S4.2 S4.2 D TOTAL DISCHARGE D1 DISCHARGE 1 D1-3 D1-3 D2 DISCHARGE 2 D3 DISCHARGE 3 D4 DISCHARGE 4 P1 STORM POND P3 STORM POND W1.1 WETLAND W1.4 WETLAND W3 WETLAND Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 2 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.1: S1.1 Runoff=0.77 cfs @ 12.16 hrs, Volume=0.105 af, Depth=0.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 3.99058Woods/grass comb., Good, HSG B 0.32098Paved parking & roofs 4.31061Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)14.82000.06000.2 Sheet Flow, n= 0.200 P2= 2.80"1.91400.03001.2 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 16.7340Total Subcatchment S1.1: S1.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=4.310 ac Runoff Volume=0.105 af Runoff Depth=0.29"Flow Length=340'Tc=16.7 min CN=61 0.77 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 3 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.2: S1.2 [49] Hint: Tc<2dt may require smaller dt Runoff=2.46 cfs @ 12.00 hrs, Volume=0.136 af, Depth=1.16"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.66061>75% Grass cover, Good, HSG B 0.74098Paved parking & roofs 1.40081Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)6.0500.02000.1 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.81500.02001.4 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.80"1.11400.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 8.9340Total Subcatchment S1.2: S1.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.400 ac Runoff Volume=0.136 af Runoff Depth=1.16"Flow Length=340'Tc=8.9 min CN=81 2.46 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 4 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.3: S1.3 [49] Hint: Tc<2dt may require smaller dt Runoff=0.17 cfs @ 12.07 hrs, Volume=0.018 af, Depth=0.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.73061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)6.31000.18000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"3.13800.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 9.4480Total Subcatchment S1.3: S1.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.730 ac Runoff Volume=0.018 af Runoff Depth=0.29"Flow Length=480'Tc=9.4 min CN=61 0.17 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 5 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.4: S1.4 [49] Hint: Tc<2dt may require smaller dt Runoff=0.18 cfs @ 12.04 hrs, Volume=0.017 af, Depth=0.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.71061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)5.71000.16000.3 Sheet Flow, n= 0.200 P2= 2.80"2.41000.01000.7 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 8.1200Total Subcatchment S1.4: S1.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.710 ac Runoff Volume=0.017 af Runoff Depth=0.29"Flow Length=200'Tc=8.1 min CN=61 0.18 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 6 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.5: S1.5 Runoff=0.04 cfs @ 12.12 hrs, Volume=0.004 af, Depth=0.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.17061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)11.22000.12000.3 Sheet Flow, n= 0.200 P2= 2.80"2.71000.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.9300Total Subcatchment S1.5: S1.5 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.04 0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.170 ac Runoff Volume=0.004 af Runoff Depth=0.29"Flow Length=300'Tc=13.9 min CN=61 0.04 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 7 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.6: S1.6 Runoff=0.49 cfs @ 12.13 hrs, Volume=0.051 af, Depth=0.35"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.53058Woods/grass comb., Good, HSG B 0.20098Paved parking & roofs 1.73063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)13.22000.08000.3 Sheet Flow, n= 0.200 P2= 2.80"2.1800.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.3280Total Subcatchment S1.6: S1.6 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.730 ac Runoff Volume=0.051 af Runoff Depth=0.35"Flow Length=280'Tc=15.3 min CN=63 0.49 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 8 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.7: S1.7 Runoff=2.89 cfs @ 12.27 hrs, Volume=0.370 af, Depth=0.45"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 7.82058Woods/grass comb., Good, HSG B 2.00098Paved parking & roofs 9.82066Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.22000.02000.2 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.44000.10004.7 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 7.06600.00601.6 Shallow Concentrated Flow, Paved Kv= 20.3 fps 26.61,260Total Subcatchment S1.7: S1.7 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)3 2 1 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=9.820 ac Runoff Volume=0.370 af Runoff Depth=0.45"Flow Length=1,260'Tc=26.6 min CN=66 2.89 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 9 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S2.1: S2.1 [49] Hint: Tc<2dt may require smaller dt Runoff=0.36 cfs @ 12.04 hrs, Volume=0.025 af, Depth=0.53"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.46061Pasture/grassland/range, Good, HSG B 0.11098Paved parking & roofs 0.57068Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.01500.09000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S2.1: S2.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.570 ac Runoff Volume=0.025 af Runoff Depth=0.53"Flow Length=150'Tc=10.0 min CN=68 0.36 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 10 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.1: S3.1 [49] Hint: Tc<2dt may require smaller dt Runoff=0.27 cfs @ 12.04 hrs, Volume=0.021 af, Depth=0.38"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.61061>75% Grass cover, Good, HSG B 0.05098Paved parking & roofs 0.66064Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)9.11600.13000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S3.1: S3.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.660 ac Runoff Volume=0.021 af Runoff Depth=0.38"Flow Length=160'Tc=9.1 min CN=64 0.27 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 11 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.2: S3.2 [49] Hint: Tc<2dt may require smaller dt Runoff=0.87 cfs @ 12.02 hrs, Volume=0.052 af, Depth=0.88"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.43061>75% Grass cover, Good, HSG B 0.28098Paved parking & roofs 0.71076Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.01500.09000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S3.2: S3.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.710 ac Runoff Volume=0.052 af Runoff Depth=0.88"Flow Length=150'Tc=10.0 min CN=76 0.87 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 12 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.3: S3.3 Runoff=0.33 cfs @ 12.20 hrs, Volume=0.041 af, Depth=0.35"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.31061>75% Grass cover, Good, HSG B 0.09098Paved parking & roofs 1.40063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)16.62000.04500.2 Sheet Flow, n= 0.200 P2= 2.80"3.61800.02800.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 20.2380Total Subcatchment S3.3: S3.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.400 ac Runoff Volume=0.041 af Runoff Depth=0.35"Flow Length=380'Tc=20.2 min CN=63 0.33 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 13 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.4: S3.4 Runoff=0.14 cfs @ 12.24 hrs, Volume=0.021 af, Depth=0.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.87061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.92600.04601.5 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 22.1460Total Subcatchment S3.4: S3.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.870 ac Runoff Volume=0.021 af Runoff Depth=0.29"Flow Length=460'Tc=22.1 min CN=61 0.14 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 14 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.5: S3.5 Runoff=3.43 cfs @ 12.04 hrs, Volume=0.219 af, Depth=1.10"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.18061>75% Grass cover, Good, HSG B 1.20098Paved parking & roofs 2.38080Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.61600.05000.3 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.41700.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 12.0330Total Subcatchment S3.5: S3.5 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)3 2 1 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=2.380 ac Runoff Volume=0.219 af Runoff Depth=1.10"Flow Length=330'Tc=12.0 min CN=80 3.43 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 15 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.6: S3.6 Runoff=0.06 cfs @ 12.15 hrs, Volume=0.008 af, Depth=0.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.31061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.9600.22000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"10.61600.05000.3 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.41700.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 15.9390Total Subcatchment S3.6: S3.6 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.310 ac Runoff Volume=0.008 af Runoff Depth=0.29"Flow Length=390'Tc=15.9 min CN=61 0.06 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 16 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.1: S4.1 Runoff=0.09 cfs @ 12.27 hrs, Volume=0.019 af, Depth=0.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 1.10058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 21.3290Total Subcatchment S4.1: S4.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=1.100 ac Runoff Volume=0.019 af Runoff Depth=0.21"Flow Length=290'Tc=21.3 min CN=58 0.09 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 17 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.2: S4.2 Runoff=0.03 cfs @ 12.29 hrs, Volume=0.006 af, Depth=0.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 2 YR Rainfall=2.80"Area (ac)CNDescription 0.23061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.8600.23000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 25.1350Total Subcatchment S4.2: S4.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Type II 24-hr 2 YR Rainfall=2.80"Runoff Area=0.230 ac Runoff Volume=0.006 af Runoff Depth=0.29"Flow Length=350'Tc=25.1 min CN=61 0.03 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 18 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D: TOTAL DISCHARGE [40] Hint: Not Described (Outflow=Inflow)Inflow Area =27.100 ac, Inflow Depth > 0.49" for 2 YR event Inflow=1.66 cfs @ 13.30 hrs, Volume=1.097 af Outflow=1.66 cfs @ 13.30 hrs, Volume=1.097 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D: TOTAL DISCHARGE Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Inflow Area=27.100 ac 1.66 cfs 1.66 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 19 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1: DISCHARGE 1 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =18.870 ac, Inflow Depth > 0.44" for 2 YR event Inflow=1.02 cfs @ 13.57 hrs, Volume=0.692 af Outflow=1.02 cfs @ 13.57 hrs, Volume=0.692 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1: DISCHARGE 1 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Inflow Area=18.870 ac 1.02 cfs 1.02 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 20 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1-3: D1-3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =20.100 ac, Inflow Depth > 0.44" for 2 YR event Inflow=1.08 cfs @ 13.49 hrs, Volume=0.739 af Outflow=1.08 cfs @ 13.49 hrs, Volume=0.739 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1-3: D1-3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Inflow Area=20.100 ac 1.08 cfs 1.08 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 21 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D2: DISCHARGE 2 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =0.570 ac, Inflow Depth = 0.53" for 2 YR event Inflow=0.36 cfs @ 12.04 hrs, Volume=0.025 af Outflow=0.36 cfs @ 12.04 hrs, Volume=0.025 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D2: DISCHARGE 2 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.570 ac 0.36 cfs 0.36 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 22 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D3: DISCHARGE 3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =0.660 ac, Inflow Depth = 0.38" for 2 YR event Inflow=0.27 cfs @ 12.04 hrs, Volume=0.021 af Outflow=0.27 cfs @ 12.04 hrs, Volume=0.021 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D3: DISCHARGE 3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.660 ac 0.27 cfs 0.27 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 23 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D4: DISCHARGE 4 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =7.000 ac, Inflow Depth > 0.62" for 2 YR event Inflow=0.61 cfs @ 12.77 hrs, Volume=0.359 af Outflow=0.61 cfs @ 12.77 hrs, Volume=0.359 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D4: DISCHARGE 4 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=7.000 ac 0.61 cfs 0.61 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 24 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond P1: STORM POND Inflow Area =2.130 ac, Inflow Depth = 0.86" for 2 YR event Inflow=2.61 cfs @ 12.01 hrs, Volume=0.153 af Outflow=0.97 cfs @ 12.20 hrs, Volume=0.153 af, Atten= 63%, Lag= 11.6 min Primary=0.97 cfs @ 12.20 hrs, Volume=0.153 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 892.67' @ 12.20 hrs Surf.Area= 0.073 ac Storage= 0.044 af Plug-Flow detention time= 66.0 min calculated for 0.153 af (100% of inflow)Center-of-Mass det. time= 68.0 min ( 924.4 - 856.4 )VolumeInvertAvail.StorageStorage Description #1892.00'0.269 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)892.000.060187.00.0000.0000.060 893.000.080212.00.0700.0700.079 894.000.100237.00.0900.1600.100 895.000.120257.00.1100.2690.119 DeviceRoutingInvertOutlet Devices #1Primary892.00'8.0" Vert. Orifice/Grate C= 0.600 #2Primary893.50'5.0' long x 0.7' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 Coef. (English) 2.76 2.82 2.93 3.09 3.18 3.22 3.27 3.30 3.32 3.31 3.32 Primary OutFlow Max=0.97 cfs @ 12.20 hrs HW=892.67' (Free Discharge)1=Orifice/Grate (Orifice Controls 0.97 cfs @ 2.8 fps)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)Pond P1: STORM POND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Inflow Area=2.130 ac Peak Elev=892.67'Storage=0.044 af 2.61 cfs 0.97 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 25 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond P3: STORM POND Inflow Area =5.670 ac, Inflow Depth = 0.72" for 2 YR event Inflow=4.35 cfs @ 12.04 hrs, Volume=0.341 af Outflow=0.56 cfs @ 12.99 hrs, Volume=0.334 af, Atten= 87%, Lag= 57.1 min Primary=0.56 cfs @ 12.99 hrs, Volume=0.334 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 894.44' @ 12.99 hrs Surf.Area= 0.322 ac Storage= 0.138 af Plug-Flow detention time= 284.2 min calculated for 0.333 af (98% of inflow)Center-of-Mass det. time= 276.0 min ( 1,152.3 - 876.3 )VolumeInvertAvail.StorageStorage Description #1894.00'0.709 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)894.000.300449.00.0000.0000.300 895.000.350479.00.3250.3250.352 896.000.420617.00.3840.7090.629 DeviceRoutingInvertOutlet Devices #1Primary894.00'12.0" x 20.0' long Culvert RCP, square edge headwall, Ke= 0.500 Outlet Invert= 893.90' S= 0.0050 '/' Cc= 0.900 n= 0.012 Primary OutFlow Max=0.56 cfs @ 12.99 hrs HW=894.44' (Free Discharge)1=Culvert (Barrel Controls 0.56 cfs @ 2.4 fps)Pond P3: STORM POND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)4 3 2 1 0 Inflow Area=5.670 ac Peak Elev=894.44'Storage=0.138 af 12.0" x 20.0' Culvert 4.35 cfs 0.56 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 26 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.1: WETLAND [81] Warning: Exceeded Pond W1.4 by 0.15' @ 14.20 hrs Inflow Area =18.870 ac, Inflow Depth = 0.45" for 2 YR event Inflow=5.10 cfs @ 12.23 hrs, Volume=0.701 af Outflow=1.02 cfs @ 13.57 hrs, Volume=0.692 af, Atten= 80%, Lag= 80.4 min Primary=1.02 cfs @ 13.57 hrs, Volume=0.692 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 888.79' @ 13.57 hrs Surf.Area= 0.403 ac Storage= 0.235 af Plug-Flow detention time= 245.8 min calculated for 0.692 af (99% of inflow)Center-of-Mass det. time= 237.1 min ( 1,164.1 - 927.0 )VolumeInvertAvail.StorageStorage Description #1888.11'4.057 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.110.290806.00.0000.0000.290 890.000.6501,598.00.8660.8663.769 892.002.7901,712.03.1914.0574.462 DeviceRoutingInvertOutlet Devices #1Primary888.10'12.0" x 20.0' long Culvert CMP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 888.08' S= 0.0010 '/' Cc= 0.900 n= 0.012 #2Primary891.23'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 0.50 Width (feet) 0.00 20.00 Primary OutFlow Max=1.02 cfs @ 13.57 hrs HW=888.79' (Free Discharge)1=Culvert (Barrel Controls 1.02 cfs @ 2.5 fps)2=Custom Weir/Orifice ( Controls 0.00 cfs)Pond W1.1: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)5 4 3 2 1 0 Inflow Area=18.870 ac Peak Elev=888.79'Storage=0.235 af 5.10 cfs 1.02 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 27 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.4: WETLAND Inflow Area =4.740 ac, Inflow Depth = 0.57" for 2 YR event Inflow=1.62 cfs @ 12.13 hrs, Volume=0.226 af Outflow=1.55 cfs @ 12.19 hrs, Volume=0.226 af, Atten= 4%, Lag= 3.4 min Primary=1.55 cfs @ 12.19 hrs, Volume=0.226 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 888.98' @ 12.19 hrs Surf.Area= 0.017 ac Storage= 0.003 af Plug-Flow detention time= 0.8 min calculated for 0.225 af (100% of inflow)Center-of-Mass det. time= 0.8 min ( 927.4 - 926.6 )VolumeInvertAvail.StorageStorage Description #1888.40'0.856 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.400.0000.00.0000.0000.000 890.000.130441.00.0690.0690.355 892.000.740750.00.7870.8561.028 DeviceRoutingInvertOutlet Devices #1Primary888.40'24.0" x 110.0' long Culvert RCP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 887.90' S= 0.0045 '/' Cc= 0.900 n= 0.012 Primary OutFlow Max=1.54 cfs @ 12.19 hrs HW=888.97' (Free Discharge)1=Culvert (Barrel Controls 1.54 cfs @ 3.1 fps)Pond W1.4: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Inflow Area=4.740 ac Peak Elev=888.98'Storage=0.003 af 24.0" x 110.0' Culvert 1.62 cfs 1.55 cfs Type II 24-hr 2 YR Rainfall=2.80"1237 Post-Development Page 28 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W3: WETLAND Inflow Area =2.270 ac, Inflow Depth = 0.33" for 2 YR event Inflow=0.46 cfs @ 12.21 hrs, Volume=0.062 af Outflow=0.31 cfs @ 12.42 hrs, Volume=0.062 af, Atten= 33%, Lag= 12.2 min Primary=0.31 cfs @ 12.42 hrs, Volume=0.062 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 896.19' @ 12.42 hrs Surf.Area= 0.092 ac Storage= 0.007 af Plug-Flow detention time= 24.6 min calculated for 0.062 af (100% of inflow)Center-of-Mass det. time= 24.7 min ( 963.4 - 938.7 )VolumeInvertAvail.StorageStorage Description #1896.11'0.151 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)896.110.080222.00.0000.0000.080 897.000.280420.00.1510.1510.312 DeviceRoutingInvertOutlet Devices #1Primary896.11'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 1.89 Width (feet) 4.00 30.00 Primary OutFlow Max=0.30 cfs @ 12.42 hrs HW=896.19' (Free Discharge)1=Custom Weir/Orifice (Weir Controls 0.30 cfs @ 0.9 fps)Pond W3: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=2.270 ac Peak Elev=896.19'Storage=0.007 af 0.46 cfs 0.31 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 29 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.1: S1.1 Runoff=4.06 cfs @ 12.12 hrs, Volume=0.329 af, Depth=0.92"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 3.99058Woods/grass comb., Good, HSG B 0.32098Paved parking & roofs 4.31061Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)14.82000.06000.2 Sheet Flow, n= 0.200 P2= 2.80"1.91400.03001.2 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 16.7340Total Subcatchment S1.1: S1.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)4 3 2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=4.310 ac Runoff Volume=0.329 af Runoff Depth=0.92"Flow Length=340'Tc=16.7 min CN=61 4.06 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 30 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.2: S1.2 [49] Hint: Tc<2dt may require smaller dt Runoff=4.87 cfs @ 12.00 hrs, Volume=0.267 af, Depth=2.29"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.66061>75% Grass cover, Good, HSG B 0.74098Paved parking & roofs 1.40081Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)6.0500.02000.1 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.81500.02001.4 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.80"1.11400.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 8.9340Total Subcatchment S1.2: S1.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)5 4 3 2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.400 ac Runoff Volume=0.267 af Runoff Depth=2.29"Flow Length=340'Tc=8.9 min CN=81 4.87 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 31 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.3: S1.3 [49] Hint: Tc<2dt may require smaller dt Runoff=0.88 cfs @ 12.02 hrs, Volume=0.056 af, Depth=0.92"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.73061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)6.31000.18000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"3.13800.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 9.4480Total Subcatchment S1.3: S1.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.730 ac Runoff Volume=0.056 af Runoff Depth=0.92"Flow Length=480'Tc=9.4 min CN=61 0.88 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 32 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.4: S1.4 [49] Hint: Tc<2dt may require smaller dt Runoff=0.92 cfs @ 12.01 hrs, Volume=0.054 af, Depth=0.92"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.71061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)5.71000.16000.3 Sheet Flow, n= 0.200 P2= 2.80"2.41000.01000.7 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 8.1200Total Subcatchment S1.4: S1.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.710 ac Runoff Volume=0.054 af Runoff Depth=0.92"Flow Length=200'Tc=8.1 min CN=61 0.92 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 33 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.5: S1.5 Runoff=0.17 cfs @ 12.09 hrs, Volume=0.013 af, Depth=0.92"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.17061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)11.22000.12000.3 Sheet Flow, n= 0.200 P2= 2.80"2.71000.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.9300Total Subcatchment S1.5: S1.5 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.170 ac Runoff Volume=0.013 af Runoff Depth=0.92"Flow Length=300'Tc=13.9 min CN=61 0.17 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 34 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.6: S1.6 Runoff=1.99 cfs @ 12.10 hrs, Volume=0.148 af, Depth=1.03"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.53058Woods/grass comb., Good, HSG B 0.20098Paved parking & roofs 1.73063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)13.22000.08000.3 Sheet Flow, n= 0.200 P2= 2.80"2.1800.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.3280Total Subcatchment S1.6: S1.6 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.730 ac Runoff Volume=0.148 af Runoff Depth=1.03"Flow Length=280'Tc=15.3 min CN=63 1.99 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 35 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.7: S1.7 Runoff=10.00 cfs @ 12.23 hrs, Volume=0.988 af, Depth=1.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 7.82058Woods/grass comb., Good, HSG B 2.00098Paved parking & roofs 9.82066Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.22000.02000.2 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.44000.10004.7 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 7.06600.00601.6 Shallow Concentrated Flow, Paved Kv= 20.3 fps 26.61,260Total Subcatchment S1.7: S1.7 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=9.820 ac Runoff Volume=0.988 af Runoff Depth=1.21"Flow Length=1,260'Tc=26.6 min CN=66 10.00 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 36 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S2.1: S2.1 [49] Hint: Tc<2dt may require smaller dt Runoff=1.06 cfs @ 12.02 hrs, Volume=0.063 af, Depth=1.33"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.46061Pasture/grassland/range, Good, HSG B 0.11098Paved parking & roofs 0.57068Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.01500.09000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S2.1: S2.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.570 ac Runoff Volume=0.063 af Runoff Depth=1.33"Flow Length=150'Tc=10.0 min CN=68 1.06 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 37 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.1: S3.1 [49] Hint: Tc<2dt may require smaller dt Runoff=1.01 cfs @ 12.01 hrs, Volume=0.060 af, Depth=1.09"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.61061>75% Grass cover, Good, HSG B 0.05098Paved parking & roofs 0.66064Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)9.11600.13000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S3.1: S3.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.660 ac Runoff Volume=0.060 af Runoff Depth=1.09"Flow Length=160'Tc=9.1 min CN=64 1.01 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 38 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.2: S3.2 [49] Hint: Tc<2dt may require smaller dt Runoff=1.95 cfs @ 12.01 hrs, Volume=0.112 af, Depth=1.89"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.43061>75% Grass cover, Good, HSG B 0.28098Paved parking & roofs 0.71076Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.01500.09000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S3.2: S3.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.710 ac Runoff Volume=0.112 af Runoff Depth=1.89"Flow Length=150'Tc=10.0 min CN=76 1.95 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 39 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.3: S3.3 Runoff=1.35 cfs @ 12.16 hrs, Volume=0.120 af, Depth=1.03"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.31061>75% Grass cover, Good, HSG B 0.09098Paved parking & roofs 1.40063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)16.62000.04500.2 Sheet Flow, n= 0.200 P2= 2.80"3.61800.02800.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 20.2380Total Subcatchment S3.3: S3.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.400 ac Runoff Volume=0.120 af Runoff Depth=1.03"Flow Length=380'Tc=20.2 min CN=63 1.35 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 40 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.4: S3.4 Runoff=0.69 cfs @ 12.19 hrs, Volume=0.066 af, Depth=0.92"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.87061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.92600.04601.5 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 22.1460Total Subcatchment S3.4: S3.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.870 ac Runoff Volume=0.066 af Runoff Depth=0.92"Flow Length=460'Tc=22.1 min CN=61 0.69 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 41 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.5: S3.5 Runoff=7.00 cfs @ 12.03 hrs, Volume=0.438 af, Depth=2.21"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.18061>75% Grass cover, Good, HSG B 1.20098Paved parking & roofs 2.38080Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.61600.05000.3 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.41700.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 12.0330Total Subcatchment S3.5: S3.5 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)7 6 5 4 3 2 1 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=2.380 ac Runoff Volume=0.438 af Runoff Depth=2.21"Flow Length=330'Tc=12.0 min CN=80 7.00 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 42 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.6: S3.6 Runoff=0.30 cfs @ 12.11 hrs, Volume=0.024 af, Depth=0.92"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.31061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.9600.22000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"10.61600.05000.3 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.41700.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 15.9390Total Subcatchment S3.6: S3.6 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.310 ac Runoff Volume=0.024 af Runoff Depth=0.92"Flow Length=390'Tc=15.9 min CN=61 0.30 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 43 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.1: S4.1 Runoff=0.67 cfs @ 12.19 hrs, Volume=0.069 af, Depth=0.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 1.10058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 21.3290Total Subcatchment S4.1: S4.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=1.100 ac Runoff Volume=0.069 af Runoff Depth=0.76"Flow Length=290'Tc=21.3 min CN=58 0.67 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 44 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.2: S4.2 Runoff=0.17 cfs @ 12.23 hrs, Volume=0.018 af, Depth=0.92"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 10 YR Rainfall=4.20"Area (ac)CNDescription 0.23061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.8600.23000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 25.1350Total Subcatchment S4.2: S4.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Type II 24-hr 10 YR Rainfall=4.20"Runoff Area=0.230 ac Runoff Volume=0.018 af Runoff Depth=0.92"Flow Length=350'Tc=25.1 min CN=61 0.17 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 45 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D: TOTAL DISCHARGE [40] Hint: Not Described (Outflow=Inflow)Inflow Area =27.100 ac, Inflow Depth > 1.24" for 10 YR event Inflow=5.75 cfs @ 12.77 hrs, Volume=2.810 af Outflow=5.75 cfs @ 12.77 hrs, Volume=2.810 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D: TOTAL DISCHARGE Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)6 5 4 3 2 1 0 Inflow Area=27.100 ac 5.75 cfs 5.75 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 46 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1: DISCHARGE 1 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =18.870 ac, Inflow Depth > 1.17" for 10 YR event Inflow=3.50 cfs @ 13.15 hrs, Volume=1.847 af Outflow=3.50 cfs @ 13.15 hrs, Volume=1.847 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1: DISCHARGE 1 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)3 2 1 0 Inflow Area=18.870 ac 3.50 cfs 3.50 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 47 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1-3: D1-3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =20.100 ac, Inflow Depth > 1.18" for 10 YR event Inflow=3.67 cfs @ 13.06 hrs, Volume=1.970 af Outflow=3.67 cfs @ 13.06 hrs, Volume=1.970 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1-3: D1-3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)4 3 2 1 0 Inflow Area=20.100 ac 3.67 cfs 3.67 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 48 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D2: DISCHARGE 2 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =0.570 ac, Inflow Depth = 1.33" for 10 YR event Inflow=1.06 cfs @ 12.02 hrs, Volume=0.063 af Outflow=1.06 cfs @ 12.02 hrs, Volume=0.063 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D2: DISCHARGE 2 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Inflow Area=0.570 ac 1.06 cfs 1.06 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 49 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D3: DISCHARGE 3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =0.660 ac, Inflow Depth = 1.09" for 10 YR event Inflow=1.01 cfs @ 12.01 hrs, Volume=0.060 af Outflow=1.01 cfs @ 12.01 hrs, Volume=0.060 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D3: DISCHARGE 3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Inflow Area=0.660 ac 1.01 cfs 1.01 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 50 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D4: DISCHARGE 4 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =7.000 ac, Inflow Depth > 1.44" for 10 YR event Inflow=2.45 cfs @ 12.31 hrs, Volume=0.840 af Outflow=2.45 cfs @ 12.31 hrs, Volume=0.840 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D4: DISCHARGE 4 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Inflow Area=7.000 ac 2.45 cfs 2.45 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 51 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond P1: STORM POND Inflow Area =2.130 ac, Inflow Depth = 1.82" for 10 YR event Inflow=5.73 cfs @ 12.00 hrs, Volume=0.323 af Outflow=1.73 cfs @ 12.22 hrs, Volume=0.323 af, Atten= 70%, Lag= 13.1 min Primary=1.73 cfs @ 12.22 hrs, Volume=0.323 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 893.39' @ 12.22 hrs Surf.Area= 0.088 ac Storage= 0.102 af Plug-Flow detention time= 54.9 min calculated for 0.323 af (100% of inflow)Center-of-Mass det. time= 54.0 min ( 890.6 - 836.6 )VolumeInvertAvail.StorageStorage Description #1892.00'0.269 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)892.000.060187.00.0000.0000.060 893.000.080212.00.0700.0700.079 894.000.100237.00.0900.1600.100 895.000.120257.00.1100.2690.119 DeviceRoutingInvertOutlet Devices #1Primary892.00'8.0" Vert. Orifice/Grate C= 0.600 #2Primary893.50'5.0' long x 0.7' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 Coef. (English) 2.76 2.82 2.93 3.09 3.18 3.22 3.27 3.30 3.32 3.31 3.32 Primary OutFlow Max=1.72 cfs @ 12.22 hrs HW=893.38' (Free Discharge)1=Orifice/Grate (Orifice Controls 1.72 cfs @ 4.9 fps)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)Pond P1: STORM POND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)6 5 4 3 2 1 0 Inflow Area=2.130 ac Peak Elev=893.39'Storage=0.102 af 5.73 cfs 1.73 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 52 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond P3: STORM POND Inflow Area =5.670 ac, Inflow Depth = 1.61" for 10 YR event Inflow=9.58 cfs @ 12.04 hrs, Volume=0.760 af Outflow=1.97 cfs @ 12.61 hrs, Volume=0.753 af, Atten= 79%, Lag= 34.1 min Primary=1.97 cfs @ 12.61 hrs, Volume=0.753 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 894.94' @ 12.61 hrs Surf.Area= 0.347 ac Storage= 0.303 af Plug-Flow detention time= 191.5 min calculated for 0.753 af (99% of inflow)Center-of-Mass det. time= 185.9 min ( 1,040.0 - 854.1 )VolumeInvertAvail.StorageStorage Description #1894.00'0.709 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)894.000.300449.00.0000.0000.300 895.000.350479.00.3250.3250.352 896.000.420617.00.3840.7090.629 DeviceRoutingInvertOutlet Devices #1Primary894.00'12.0" x 20.0' long Culvert RCP, square edge headwall, Ke= 0.500 Outlet Invert= 893.90' S= 0.0050 '/' Cc= 0.900 n= 0.012 Primary OutFlow Max=1.97 cfs @ 12.61 hrs HW=894.94' (Free Discharge)1=Culvert (Barrel Controls 1.97 cfs @ 3.3 fps)Pond P3: STORM POND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)10 9 8 7 6 5 4 3 2 1 0 Inflow Area=5.670 ac Peak Elev=894.94'Storage=0.303 af 12.0" x 20.0' Culvert 9.58 cfs 1.97 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 53 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.1: WETLAND [81] Warning: Exceeded Pond W1.4 by 0.86' @ 13.80 hrs Inflow Area =18.870 ac, Inflow Depth = 1.18" for 10 YR event Inflow=17.16 cfs @ 12.19 hrs, Volume=1.856 af Outflow=3.50 cfs @ 13.15 hrs, Volume=1.847 af, Atten= 80%, Lag= 57.2 min Primary=3.50 cfs @ 13.15 hrs, Volume=1.847 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 889.71' @ 13.15 hrs Surf.Area= 0.585 ac Storage= 0.686 af Plug-Flow detention time= 172.4 min calculated for 1.847 af (100% of inflow)Center-of-Mass det. time= 168.7 min ( 1,056.7 - 888.0 )VolumeInvertAvail.StorageStorage Description #1888.11'4.057 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.110.290806.00.0000.0000.290 890.000.6501,598.00.8660.8663.769 892.002.7901,712.03.1914.0574.462 DeviceRoutingInvertOutlet Devices #1Primary888.10'12.0" x 20.0' long Culvert CMP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 888.08' S= 0.0010 '/' Cc= 0.900 n= 0.012 #2Primary891.23'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 0.50 Width (feet) 0.00 20.00 Primary OutFlow Max=3.50 cfs @ 13.15 hrs HW=889.71' (Free Discharge)1=Culvert (Barrel Controls 3.50 cfs @ 4.5 fps)2=Custom Weir/Orifice ( Controls 0.00 cfs)Pond W1.1: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=18.870 ac Peak Elev=889.71'Storage=0.686 af 17.16 cfs 3.50 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 54 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.4: WETLAND Inflow Area =4.740 ac, Inflow Depth = 1.36" for 10 YR event Inflow=4.39 cfs @ 12.09 hrs, Volume=0.538 af Outflow=4.02 cfs @ 12.16 hrs, Volume=0.538 af, Atten= 8%, Lag= 3.9 min Primary=4.02 cfs @ 12.16 hrs, Volume=0.538 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 889.36' @ 12.16 hrs Surf.Area= 0.047 ac Storage= 0.015 af Plug-Flow detention time= 1.4 min calculated for 0.538 af (100% of inflow)Center-of-Mass det. time= 1.4 min ( 889.8 - 888.4 )VolumeInvertAvail.StorageStorage Description #1888.40'0.856 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.400.0000.00.0000.0000.000 890.000.130441.00.0690.0690.355 892.000.740750.00.7870.8561.028 DeviceRoutingInvertOutlet Devices #1Primary888.40'24.0" x 110.0' long Culvert RCP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 887.90' S= 0.0045 '/' Cc= 0.900 n= 0.012 Primary OutFlow Max=3.94 cfs @ 12.16 hrs HW=889.35' (Free Discharge)1=Culvert (Barrel Controls 3.94 cfs @ 3.9 fps)Pond W1.4: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)4 3 2 1 0 Inflow Area=4.740 ac Peak Elev=889.36'Storage=0.015 af 24.0" x 110.0' Culvert 4.39 cfs 4.02 cfs Type II 24-hr 10 YR Rainfall=4.20"1237 Post-Development Page 55 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W3: WETLAND Inflow Area =2.270 ac, Inflow Depth = 0.99" for 10 YR event Inflow=2.02 cfs @ 12.17 hrs, Volume=0.186 af Outflow=1.66 cfs @ 12.29 hrs, Volume=0.186 af, Atten= 18%, Lag= 7.1 min Primary=1.66 cfs @ 12.29 hrs, Volume=0.186 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 896.32' @ 12.29 hrs Surf.Area= 0.117 ac Storage= 0.021 af Plug-Flow detention time= 16.5 min calculated for 0.186 af (100% of inflow)Center-of-Mass det. time= 16.6 min ( 909.1 - 892.4 )VolumeInvertAvail.StorageStorage Description #1896.11'0.151 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)896.110.080222.00.0000.0000.080 897.000.280420.00.1510.1510.312 DeviceRoutingInvertOutlet Devices #1Primary896.11'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 1.89 Width (feet) 4.00 30.00 Primary OutFlow Max=1.64 cfs @ 12.29 hrs HW=896.32' (Free Discharge)1=Custom Weir/Orifice (Weir Controls 1.64 cfs @ 1.4 fps)Pond W3: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Inflow Area=2.270 ac Peak Elev=896.32'Storage=0.021 af 2.02 cfs 1.66 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 56 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.1: S1.1 Runoff=9.94 cfs @ 12.11 hrs, Volume=0.720 af, Depth=2.01"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 3.99058Woods/grass comb., Good, HSG B 0.32098Paved parking & roofs 4.31061Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)14.82000.06000.2 Sheet Flow, n= 0.200 P2= 2.80"1.91400.03001.2 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 16.7340Total Subcatchment S1.1: S1.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=4.310 ac Runoff Volume=0.720 af Runoff Depth=2.01"Flow Length=340'Tc=16.7 min CN=61 9.94 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 57 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.2: S1.2 [49] Hint: Tc<2dt may require smaller dt Runoff=8.14 cfs @ 12.00 hrs, Volume=0.453 af, Depth=3.88"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.66061>75% Grass cover, Good, HSG B 0.74098Paved parking & roofs 1.40081Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)6.0500.02000.1 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.81500.02001.4 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.80"1.11400.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 8.9340Total Subcatchment S1.2: S1.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)9 8 7 6 5 4 3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.400 ac Runoff Volume=0.453 af Runoff Depth=3.88"Flow Length=340'Tc=8.9 min CN=81 8.14 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 58 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.3: S1.3 [49] Hint: Tc<2dt may require smaller dt Runoff=2.12 cfs @ 12.01 hrs, Volume=0.122 af, Depth=2.01"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.73061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)6.31000.18000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"3.13800.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 9.4480Total Subcatchment S1.3: S1.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.730 ac Runoff Volume=0.122 af Runoff Depth=2.01"Flow Length=480'Tc=9.4 min CN=61 2.12 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 59 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.4: S1.4 [49] Hint: Tc<2dt may require smaller dt Runoff=2.18 cfs @ 12.00 hrs, Volume=0.119 af, Depth=2.01"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.71061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)5.71000.16000.3 Sheet Flow, n= 0.200 P2= 2.80"2.41000.01000.7 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 8.1200Total Subcatchment S1.4: S1.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.710 ac Runoff Volume=0.119 af Runoff Depth=2.01"Flow Length=200'Tc=8.1 min CN=61 2.18 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 60 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.5: S1.5 Runoff=0.42 cfs @ 12.08 hrs, Volume=0.028 af, Depth=2.01"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.17061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)11.22000.12000.3 Sheet Flow, n= 0.200 P2= 2.80"2.71000.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.9300Total Subcatchment S1.5: S1.5 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.170 ac Runoff Volume=0.028 af Runoff Depth=2.01"Flow Length=300'Tc=13.9 min CN=61 0.42 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 61 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.6: S1.6 Runoff=4.55 cfs @ 12.09 hrs, Volume=0.314 af, Depth=2.18"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.53058Woods/grass comb., Good, HSG B 0.20098Paved parking & roofs 1.73063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)13.22000.08000.3 Sheet Flow, n= 0.200 P2= 2.80"2.1800.00800.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 15.3280Total Subcatchment S1.6: S1.6 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)5 4 3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.730 ac Runoff Volume=0.314 af Runoff Depth=2.18"Flow Length=280'Tc=15.3 min CN=63 4.55 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 62 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S1.7: S1.7 Runoff=21.67 cfs @ 12.22 hrs, Volume=1.997 af, Depth=2.44"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 7.82058Woods/grass comb., Good, HSG B 2.00098Paved parking & roofs 9.82066Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)18.22000.02000.2 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.44000.10004.7 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 7.06600.00601.6 Shallow Concentrated Flow, Paved Kv= 20.3 fps 26.61,260Total Subcatchment S1.7: S1.7 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=9.820 ac Runoff Volume=1.997 af Runoff Depth=2.44"Flow Length=1,260'Tc=26.6 min CN=66 21.67 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 63 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S2.1: S2.1 [49] Hint: Tc<2dt may require smaller dt Runoff=2.16 cfs @ 12.01 hrs, Volume=0.124 af, Depth=2.62"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.46061Pasture/grassland/range, Good, HSG B 0.11098Paved parking & roofs 0.57068Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.01500.09000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S2.1: S2.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.570 ac Runoff Volume=0.124 af Runoff Depth=2.62"Flow Length=150'Tc=10.0 min CN=68 2.16 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 64 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.1: S3.1 [49] Hint: Tc<2dt may require smaller dt Runoff=2.23 cfs @ 12.01 hrs, Volume=0.124 af, Depth=2.26"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.61061>75% Grass cover, Good, HSG B 0.05098Paved parking & roofs 0.66064Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)9.11600.13000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S3.1: S3.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.660 ac Runoff Volume=0.124 af Runoff Depth=2.26"Flow Length=160'Tc=9.1 min CN=64 2.23 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 65 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.2: S3.2 [49] Hint: Tc<2dt may require smaller dt Runoff=3.48 cfs @ 12.01 hrs, Volume=0.200 af, Depth=3.38"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.43061>75% Grass cover, Good, HSG B 0.28098Paved parking & roofs 0.71076Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.01500.09000.3 Sheet Flow, n= 0.200 P2= 2.80"Subcatchment S3.2: S3.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.710 ac Runoff Volume=0.200 af Runoff Depth=3.38"Flow Length=150'Tc=10.0 min CN=76 3.48 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 66 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.3: S3.3 Runoff=3.17 cfs @ 12.14 hrs, Volume=0.254 af, Depth=2.18"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.31061>75% Grass cover, Good, HSG B 0.09098Paved parking & roofs 1.40063Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)16.62000.04500.2 Sheet Flow, n= 0.200 P2= 2.80"3.61800.02800.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 20.2380Total Subcatchment S3.3: S3.3 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.400 ac Runoff Volume=0.254 af Runoff Depth=2.18"Flow Length=380'Tc=20.2 min CN=63 3.17 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 67 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.4: S3.4 Runoff=1.69 cfs @ 12.17 hrs, Volume=0.145 af, Depth=2.01"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.87061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.92600.04601.5 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 22.1460Total Subcatchment S3.4: S3.4 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.870 ac Runoff Volume=0.145 af Runoff Depth=2.01"Flow Length=460'Tc=22.1 min CN=61 1.69 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 68 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.5: S3.5 Runoff=11.93 cfs @ 12.03 hrs, Volume=0.750 af, Depth=3.78"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.18061>75% Grass cover, Good, HSG B 1.20098Paved parking & roofs 2.38080Weighted Average TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)10.61600.05000.3 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.41700.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 12.0330Total Subcatchment S3.5: S3.5 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=2.380 ac Runoff Volume=0.750 af Runoff Depth=3.78"Flow Length=330'Tc=12.0 min CN=80 11.93 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 69 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S3.6: S3.6 Runoff=0.73 cfs @ 12.10 hrs, Volume=0.052 af, Depth=2.01"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.31061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.9600.22000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"10.61600.05000.3 Sheet Flow, Grass: Short n= 0.150 P2= 2.80"1.41700.01002.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 15.9390Total Subcatchment S3.6: S3.6 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.310 ac Runoff Volume=0.052 af Runoff Depth=2.01"Flow Length=390'Tc=15.9 min CN=61 0.73 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 70 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.1: S4.1 Runoff=1.85 cfs @ 12.17 hrs, Volume=0.161 af, Depth=1.76"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 1.10058Woods/grass comb., Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 21.3290Total Subcatchment S4.1: S4.1 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=1.100 ac Runoff Volume=0.161 af Runoff Depth=1.76"Flow Length=290'Tc=21.3 min CN=58 1.85 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 71 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Subcatchment S4.2: S4.2 Runoff=0.42 cfs @ 12.21 hrs, Volume=0.038 af, Depth=2.01"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Type II 24-hr 100 YR Rainfall=6.00"Area (ac)CNDescription 0.23061>75% Grass cover, Good, HSG B TcLengthSlopeVelocityCapacityDescription (min)(feet)(ft/ft)(ft/sec)(cfs)3.8600.23000.3 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"19.22000.04500.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.80"2.1900.02000.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 25.1350Total Subcatchment S4.2: S4.2 Runoff Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 100 YR Rainfall=6.00"Runoff Area=0.230 ac Runoff Volume=0.038 af Runoff Depth=2.01"Flow Length=350'Tc=25.1 min CN=61 0.42 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 72 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D: TOTAL DISCHARGE [40] Hint: Not Described (Outflow=Inflow)Inflow Area =27.100 ac, Inflow Depth > 2.47" for 100 YR event Inflow=11.11 cfs @ 12.29 hrs, Volume=5.586 af Outflow=11.11 cfs @ 12.29 hrs, Volume=5.586 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D: TOTAL DISCHARGE Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=27.100 ac 11.11 cfs 11.11 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 73 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1: DISCHARGE 1 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =18.870 ac, Inflow Depth > 2.38" for 100 YR event Inflow=5.61 cfs @ 13.26 hrs, Volume=3.744 af Outflow=5.61 cfs @ 13.26 hrs, Volume=3.744 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1: DISCHARGE 1 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)6 5 4 3 2 1 0 Inflow Area=18.870 ac 5.61 cfs 5.61 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 74 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D1-3: D1-3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =20.100 ac, Inflow Depth > 2.38" for 100 YR event Inflow=5.94 cfs @ 12.83 hrs, Volume=3.993 af Outflow=5.94 cfs @ 12.83 hrs, Volume=3.993 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D1-3: D1-3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)6 5 4 3 2 1 0 Inflow Area=20.100 ac 5.94 cfs 5.94 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 75 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D2: DISCHARGE 2 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =0.570 ac, Inflow Depth = 2.62" for 100 YR event Inflow=2.16 cfs @ 12.01 hrs, Volume=0.124 af Outflow=2.16 cfs @ 12.01 hrs, Volume=0.124 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D2: DISCHARGE 2 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Inflow Area=0.570 ac 2.16 cfs 2.16 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 76 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D3: DISCHARGE 3 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =0.660 ac, Inflow Depth = 2.26" for 100 YR event Inflow=2.23 cfs @ 12.01 hrs, Volume=0.124 af Outflow=2.23 cfs @ 12.01 hrs, Volume=0.124 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D3: DISCHARGE 3 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)2 1 0 Inflow Area=0.660 ac 2.23 cfs 2.23 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 77 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Reach D4: DISCHARGE 4 [40] Hint: Not Described (Outflow=Inflow)Inflow Area =7.000 ac, Inflow Depth > 2.73" for 100 YR event Inflow=5.56 cfs @ 12.23 hrs, Volume=1.593 af Outflow=5.56 cfs @ 12.23 hrs, Volume=1.593 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Reach D4: DISCHARGE 4 Inflow Outflow Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)6 5 4 3 2 1 0 Inflow Area=7.000 ac 5.56 cfs 5.56 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 78 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond P1: STORM POND Inflow Area =2.130 ac, Inflow Depth = 3.24" for 100 YR event Inflow=10.24 cfs @ 12.00 hrs, Volume=0.575 af Outflow=6.78 cfs @ 12.12 hrs, Volume=0.575 af, Atten= 34%, Lag= 7.3 min Primary=6.78 cfs @ 12.12 hrs, Volume=0.575 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 893.98' @ 12.12 hrs Surf.Area= 0.100 ac Storage= 0.157 af Plug-Flow detention time= 42.1 min calculated for 0.574 af (100% of inflow)Center-of-Mass det. time= 43.5 min ( 865.1 - 821.5 )VolumeInvertAvail.StorageStorage Description #1892.00'0.269 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)892.000.060187.00.0000.0000.060 893.000.080212.00.0700.0700.079 894.000.100237.00.0900.1600.100 895.000.120257.00.1100.2690.119 DeviceRoutingInvertOutlet Devices #1Primary892.00'8.0" Vert. Orifice/Grate C= 0.600 #2Primary893.50'5.0' long x 0.7' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 Coef. (English) 2.76 2.82 2.93 3.09 3.18 3.22 3.27 3.30 3.32 3.31 3.32 Primary OutFlow Max=6.30 cfs @ 12.12 hrs HW=893.94' (Free Discharge)1=Orifice/Grate (Orifice Controls 2.13 cfs @ 6.1 fps)2=Broad-Crested Rectangular Weir (Weir Controls 4.17 cfs @ 1.9 fps)Pond P1: STORM POND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=2.130 ac Peak Elev=893.98'Storage=0.157 af 10.24 cfs 6.78 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 79 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond P3: STORM POND Inflow Area =5.670 ac, Inflow Depth = 2.97" for 100 YR event Inflow=17.88 cfs @ 12.04 hrs, Volume=1.401 af Outflow=3.90 cfs @ 12.57 hrs, Volume=1.394 af, Atten= 78%, Lag= 31.5 min Primary=3.90 cfs @ 12.57 hrs, Volume=1.394 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 895.68' @ 12.57 hrs Surf.Area= 0.397 ac Storage= 0.578 af Plug-Flow detention time= 149.0 min calculated for 1.392 af (99% of inflow)Center-of-Mass det. time= 149.1 min ( 986.8 - 837.7 )VolumeInvertAvail.StorageStorage Description #1894.00'0.709 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)894.000.300449.00.0000.0000.300 895.000.350479.00.3250.3250.352 896.000.420617.00.3840.7090.629 DeviceRoutingInvertOutlet Devices #1Primary894.00'12.0" x 20.0' long Culvert RCP, square edge headwall, Ke= 0.500 Outlet Invert= 893.90' S= 0.0050 '/' Cc= 0.900 n= 0.012 Primary OutFlow Max=3.90 cfs @ 12.57 hrs HW=895.68' (Free Discharge)1=Culvert (Barrel Controls 3.90 cfs @ 5.0 fps)Pond P3: STORM POND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=5.670 ac Peak Elev=895.68'Storage=0.578 af 12.0" x 20.0' Culvert 17.88 cfs 3.90 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 80 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.1: WETLAND [81] Warning: Exceeded Pond W1.4 by 1.88' @ 14.20 hrs Inflow Area =18.870 ac, Inflow Depth = 2.39" for 100 YR event Inflow=39.14 cfs @ 12.18 hrs, Volume=3.753 af Outflow=5.61 cfs @ 13.26 hrs, Volume=3.744 af, Atten= 86%, Lag= 64.7 min Primary=5.61 cfs @ 13.26 hrs, Volume=3.744 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 890.80' @ 13.26 hrs Surf.Area= 1.330 ac Storage= 1.645 af Plug-Flow detention time= 177.2 min calculated for 3.739 af (100% of inflow)Center-of-Mass det. time= 178.3 min ( 1,042.9 - 864.6 )VolumeInvertAvail.StorageStorage Description #1888.11'4.057 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.110.290806.00.0000.0000.290 890.000.6501,598.00.8660.8663.769 892.002.7901,712.03.1914.0574.462 DeviceRoutingInvertOutlet Devices #1Primary888.10'12.0" x 20.0' long Culvert CMP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 888.08' S= 0.0010 '/' Cc= 0.900 n= 0.012 #2Primary891.23'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 0.50 Width (feet) 0.00 20.00 Primary OutFlow Max=5.61 cfs @ 13.26 hrs HW=890.80' (Free Discharge)1=Culvert (Inlet Controls 5.61 cfs @ 7.1 fps)2=Custom Weir/Orifice ( Controls 0.00 cfs)Pond W1.1: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=18.870 ac Peak Elev=890.80'Storage=1.645 af 39.14 cfs 5.61 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 81 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W1.4: WETLAND Inflow Area =4.740 ac, Inflow Depth = 2.62" for 100 YR event Inflow=12.88 cfs @ 12.10 hrs, Volume=1.036 af Outflow=9.71 cfs @ 12.20 hrs, Volume=1.036 af, Atten= 25%, Lag= 5.8 min Primary=9.71 cfs @ 12.20 hrs, Volume=1.036 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 890.03' @ 12.20 hrs Surf.Area= 0.135 ac Storage= 0.073 af Plug-Flow detention time= 2.4 min calculated for 1.036 af (100% of inflow)Center-of-Mass det. time= 2.4 min ( 865.3 - 862.9 )VolumeInvertAvail.StorageStorage Description #1888.40'0.856 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)888.400.0000.00.0000.0000.000 890.000.130441.00.0690.0690.355 892.000.740750.00.7870.8561.028 DeviceRoutingInvertOutlet Devices #1Primary888.40'24.0" x 110.0' long Culvert RCP, end-section conforming to fill, Ke= 0.500 Outlet Invert= 887.90' S= 0.0045 '/' Cc= 0.900 n= 0.012 Primary OutFlow Max=9.70 cfs @ 12.20 hrs HW=890.03' (Free Discharge)1=Culvert (Barrel Controls 9.70 cfs @ 4.8 fps)Pond W1.4: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=4.740 ac Peak Elev=890.03'Storage=0.073 af 24.0" x 110.0' Culvert 12.88 cfs 9.71 cfs Type II 24-hr 100 YR Rainfall=6.00"1237 Post-Development Page 82 Prepared by Kallio Engineering LLC 4/17/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond W3: WETLAND Inflow Area =2.270 ac, Inflow Depth = 2.11" for 100 YR event Inflow=4.79 cfs @ 12.15 hrs, Volume=0.399 af Outflow=4.31 cfs @ 12.24 hrs, Volume=0.399 af, Atten= 10%, Lag= 5.3 min Primary=4.31 cfs @ 12.24 hrs, Volume=0.399 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.10 hrs Peak Elev= 896.47' @ 12.24 hrs Surf.Area= 0.147 ac Storage= 0.041 af Plug-Flow detention time= 13.3 min calculated for 0.399 af (100% of inflow)Center-of-Mass det. time= 12.8 min ( 880.2 - 867.4 )VolumeInvertAvail.StorageStorage Description #1896.11'0.151 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)896.110.080222.00.0000.0000.080 897.000.280420.00.1510.1510.312 DeviceRoutingInvertOutlet Devices #1Primary896.11'Custom Weir/Orifice, C= 2.62 Head (feet) 0.00 1.89 Width (feet) 4.00 30.00 Primary OutFlow Max=4.15 cfs @ 12.24 hrs HW=896.47' (Free Discharge)1=Custom Weir/Orifice (Weir Controls 4.15 cfs @ 1.8 fps)Pond W3: WETLAND Inflow Primary Hydrograph Time (hours)72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 Flow (cfs)5 4 3 2 1 0 Inflow Area=2.270 ac Peak Elev=896.47'Storage=0.041 af 4.79 cfs 4.31 cfs Spillway 1-day 10-day Snowmelt Rainfall=7.20", AMC=4 1237 Snowmelt Page 1 Prepared by Kallio Engineering LLC 4/18/2013 HydroCAD® 7.10 s/n 002095 © 2005 HydroCAD Software Solutions LLC Pond P3: STORM POND Inflow Area =5.670 ac, Inflow Depth > 6.96" for Snowmelt event Inflow=2.63 cfs @ 121.48 hrs, Volume=3.289 af Outflow=2.02 cfs @ 122.45 hrs, Volume=3.257 af, Atten= 23%, Lag= 58.4 min Primary=2.02 cfs @ 122.45 hrs, Volume=3.257 af Routing by Stor-Ind method, Time Span= 0.00-240.00 hrs, dt= 0.20 hrs Peak Elev= 894.95' @ 122.45 hrs Surf.Area= 0.348 ac Storage= 0.308 af Plug-Flow detention time= 276.1 min calculated for 3.257 af (99% of inflow)Center-of-Mass det. time= 211.1 min ( 7,638.9 - 7,427.8 )VolumeInvertAvail.StorageStorage Description #1894.00'0.709 af Custom Stage Data (Irregular) Listed below (Recalc)ElevationSurf.AreaPerim.Inc.StoreCum.StoreWet.Area (feet)(acres)(feet)(acre-feet)(acre-feet)(acres)894.000.300449.00.0000.0000.300 895.000.350479.00.3250.3250.352 896.000.420617.00.3840.7090.629 DeviceRoutingInvertOutlet Devices #1Primary894.00'12.0" x 20.0' long Culvert RCP, square edge headwall, Ke= 0.500 Outlet Invert= 893.90' S= 0.0050 '/' Cc= 0.900 n= 0.012 Primary OutFlow Max=2.02 cfs @ 122.45 hrs HW=894.95' (Free Discharge)1=Culvert (Barrel Controls 2.02 cfs @ 3.4 fps)Pond P3: STORM POND Inflow Primary Hydrograph Time (hours)240 230 220 210 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Flow (cfs)2 1 0 Inflow Area=5.670 ac Peak Elev=894.95'Storage=0.308 af 12.0" x 20.0' Culvert 2.63 cfs 2.02 cfs