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Drainage Report 04-27-20
Historic Fort Harrison 8901 Otis Avenue Indianapolis, Indiana 46216 Phone - 317.826.7100 Fax - 317.826.7200 www.schneidercorp.com contact@schneidercorp.com Carey Grove Park Rehabilitation Hamilton County Carmel, IN 46032 Carmel/Clay Parks & Recreation 1411 East 116th Street Carmel, Indiana 46032 (317) 573-4018 DESIGN ENGINEERS: Richard R. Hoover, P.E. Alexander K. McDaniel, E.I. The Schneider Corporation Historic Fort Harrison 8901 Otis Avenue Indianapolis, IN 46216-1037 317-826-7100 April 26, 2020 Drainage Report and Design Summary for: Prepared for: TSC #10411.002 TABLE OF CONTENTS A. Drainage Narrative A1-A4 B. Site Maps Vicinity map B1 FIRM map B2 Soils Report B3-B5 C. Existing Conditions Existing Drainage Basin Map C1 Existing Basin Composite Curve Number C2 Existing Basin Time of Concentration C3 Existing Conditions HydroCAD Model C4-C19 D. Proposed Conditions Proposed Drainage Basin Map D1 Proposed Basin Composite Curve Number D2 Proposed Basin Time of Concentration D3 Proposed Conditions HydroCAD Model (6” Orifice) D4-19 Proposed Conditions HydroCAD Model (Design Orifice) D20-D35 Stage-Storage Calculations D36 Orifice Design Calculations D37 Water Quality Volume Basin Map D38 Water Quality Unit Sizing HydroCAD Model D39-D40 Emergency Routing Exhibit D41 Emergency Routing Calculations D42 DRAINAGE NARRATIVE Site Location: The proposed site is located at 14001 Carey Road in Carmel, Hamilton County, Indiana. Existing Conditions: The project site has an area of approximately 5.40 acres. It currently serves as the existing Carey Grove Park and is bounded by residential development on all sides of the project site. The site has a highpoint in the southeast corner of the project site and generally drains north and east. Runoff draining to the north is collected by an existing offsite stormwater sewer manhole. Runoff draining east is collected into an existing onsite stormwater sewer and is conveyed to the northern border of the site into an offsite stormwater sewer structure. Undergound utilities such as electric, water, and sanitary sewer lines run along the western border of the project site. Storm Event Existing Release Rate (cfs) Off-Site Release Rate (cfs) 2-Year 4.30 1.50 10-Year 8.93 3.17 100-Year 20.77 7.45 Adjoining land conditions: North: Residential South: Residential East: Residential West: Residential Receiving Watershed: Hydrologic Unit Code (HUC14): 05120201090020 100-Year Floodplains, Floodways, and Flood Fringes: The proposed project site is not within a floodplain, per FIRM 18057C0226G dated November 19, 2014 and has been designated as an area of minimal flood hazard area. Soil types: Soils maps from the United States Departmen t of Agriculture, Soil Conservation Service identify two soil types on the site; Miami Silt Loam-Urban Land Complex (YmsB2) and Crosby Silt Loam (YclA), both are a part of Hydrologic Soil Group C. Proposed Conditions: The rehabilitation of this site includes the construction of a new parking area, basketball court, playground area, infiltration trenches, and dry detention area. The project site will be graded with high points at the east and west sections of the site so that stormwater runoff drains to the center of the site where it will be collected into the proposed dry detention area. Once water is collected into the proposed dry detention area it will be conveyed through the outlet control structure and to the existing offsite stormwater sewer manhole to the north. The dry detention area was designed using an outlet control structure with a 0.3-foot orifice. The allowable release rates, design release rates (from design orifice), and actual release rates (from 0.5-foot orifice) can be found in the table below: Storm Event Allowable Release Rate (cfs) Design Release Rate (cfs) Actual Release Rate (cfs) Off-Site Release Rate (cfs) 2-Year - 0.44 1.11 1.50 10-Year 0.54 0.51 1.31 3.17 100-Year 1.62 0.61 1.58 7.45 All design release rates for the proposed stormwater sewer system are less than the required allowable release rates. Water Quality Volume: The Water Quality volume for this site will be met with the installation of two infiltration trenches on the east and west side of the project site. The west infiltration trench was designed using a drainage area of 1.276 acres. The percent impervious are and the runoff volume coefficient was calculated to be 50.55 percent and 0.50, respectively. With this information the required water quality volume was calculated to be 0.054 acre-feet. The west infiltration trench was designed to have a bottom surface area of 3,094 square-feet and a depth of 2 feet to give a water quality volume of 0.057 acre-feet. The east infiltration trench was designed using a drainage area of 3.998 acres. The percent impervious are and the runoff volume coefficient was calcu lated to be 15.43 percent and 0.19, respectively. With this information the required water quality volume was calculated to be 0.055 acre-feet. The west infiltration trench was designed to have a bottom surface area of 3,350 square-feet and a depth of 2.25 feet to give a water quality volume of 0.069 acre-feet. A basin map and detailed calculations can be found in Appendix D of this report. References: Design and data methods are based on the following references: 1. City of Carmel Stormwater Specifications Manual 2. Federal Emergency Management Agency 3. NRCS Web Soil Survey APPENDIX B SITE MAPS Vicin ity M ap 2000 ft N➤➤N © 2020 Google © 2020 Google © 2020 Google USGS The National Map: Orthoimagery. Data refreshed April, 2019. National Flood Hazard Layer FIRMette 0 500 1,000 1,500 2,000250Feet Ü86°6'46.39"W 39°59'46.44"N 86°6'8.93"W 39°59'18.88"N SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT SPECIAL FLOODHAZARD AR EAS Without Base Flood Elevation (BFE)Zone A, V, A99With BFE or Depth Zone AE, AO, AH, VE, AR Regulator y Floodway 0.2% Annual Chance Flood Hazard, Areasof 1% annual chance flood with averagedepth less than one foot or with drainageareas of less than one square mile Zone X Future Conditions 1% AnnualChance Flood Hazard Zone XArea with Reduced Flood Risk due toLevee. See Notes.Zone X Area with Flood Risk due to Levee Zone D NO SCREE N Area of Minimal Flood Hazard Zone X Area of Undetermined Flood Hazard Zone D Channel, Culver t, or Storm SewerLevee, Dike, or Floodwall Cross Sections with 1% Annual Chance17.5 Water Surface ElevationCoastal Transect Coastal Transect BaselineProfile BaselineHydrographic Feature Base Flood Elevation Line (BFE) Effective LOMRs Limit of StudyJurisdiction Boundar y Digital Data Available No Digital Data Available Unmapped This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The basemap shown complies with FEMA's basemap accuracy standards The flood hazard information is derived directly from theauthoritative NFHL web ser vices provided by FEMA. This mapwas exported on 3/23/2020 at 9:53:36 AM and does notreflect changes or amendments subsequent to this date andtime. The NFHL and effective information may change orbecome superseded by new data over time. This map image is void if the one or more of the following mapelements do not appear: basemap imagery, flood zone labels,legend, scale bar, map creation date, community identifiers,FIRM panel number, and FIRM effective date. Map images forunmapped and unmodernized areas cannot be used forregulatory purposes. Legend OTHER AREAS OFFLOOD HAZARD OTHER AREAS GENERALSTRUCTURES OTHERFEATURES MAP PANELS 8 1:6,000 B 20.2 The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative proper ty location. Soil Map—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/3/2019 Page 1 of 3442721044272304427250442727044272904427310442733044273504427370442721044272304427250442727044272904427310442733044273504427370576060576080576100576120576140576160576180576200576220576240576260576280576300576320 576060 576080 576100 576120 576140 576160 576180 576200 576220 576240 576260 576280 576300 576320 39° 59' 35'' N 86° 6' 32'' W39° 59' 35'' N86° 6' 21'' W39° 59' 29'' N 86° 6' 32'' W39° 59' 29'' N 86° 6' 21'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84 0 50 100 200 300 Feet 0 15 30 60 90 Meters Map Scale: 1:1,260 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:15,800. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Hamilton County, Indiana Survey Area Data: Version 20, Sep 16, 2019 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Aug 1, 2018—Sep 30, 2018 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/3/2019 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI YclA Crosby silt loam, fine-loamy subsoil-Urban land complex, 0 to 2 percent slopes 0.7 12.8% YmsB2 Miami silt loam-Urban land complex, 2 to 6 percent slopes, eroded 5.0 87.2% Totals for Area of Interest 5.8 100.0% Soil Map—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/3/2019 Page 3 of 3 APPENDIX C EXISTING CONDITIONS Composite Curve Number Computation Worksheet Job No. By AKM Project Date 3/2/2020 Location Checked RRH Description Date 3/2/2020 Area ac/mi2/% YmsB2/YclA, C Grass Cover, Good 74 3.75 277.50 YmsB2/YclA, C Paved Area/Impervious Surface 98 0.54 52.92 4.29 330.42 =77 Product of CN x area 77.02330.42 4.29 Totals = = Use CN 10829.002 Carey Grove Park Carmel, Hamilton County, IN Existing Basin CN CN (weighted) = total product/total area = Cover description (cover type, treatment, and hydrologic condition; percent impervious; unconnected/connected impervious area ratio) Soil name and hydrologic group CN Existing CN Worksheet Composite Curve Number Computation Worksheet Job No. By AKM Project Date 3/2/2020 Location Checked RRH Description Date 3/2/2020 Area ac/mi2/% YmsB2/YclA, C Grass Cover, Good 74 1.06 78.22 YmsB2/YclA, C Paved Area/Impervious Surface 98 0.05 4.90 1.11 83.12 =75Use CN Product of CN x area Totals = CN (weighted) = total product/total area = 83.12 = 75.08 1.11 10829.002 Carey Grove Park Carmel, Hamilton County, IN Existing Off-Site Basin CN Soil name and hydrologic group Cover description (cover type, treatment, and hydrologic condition; percent impervious; unconnected/connected impervious area ratio) CN Existing Off-Site CN Worksheet Time of Concentration Worksheet By: AKM Project Name: Date: 3/2/2020 Location: Checked: RRH Description: Existing Basin Time of Concentration Date: 3/2/2020 SHEET FLOW (Applicable to Tc only)Segment ID Total 1. Surface description Short Grass 2. Manning's roughness coefficient, n ………. 0.150 3. Flow length, L (total L < 300 ft)ft 100 4. two-year, 24-hour rainfall, P 2 in 2.64 5. Land slope, s ft/ft 0.011 6. Tt = [0.007(nL)0.8]/[P2 0.5s0.4]Compute Tt ………. hr 0.228 0.228 n source: P2 source: SHALLOW CONCENTRATED FLOW Segment ID Total 7. Surface description (paved or unpaved) ………. Unpaved 8. Flow length, L ft 265 9. Watercourse slope, s ft/ft 0.011 10. Average velocity, v ft/s 1.80 11. Tt = (L/v)/3600 Compute Tt ………. hr 0.041 0.041 v = 20.3282(s)0.5 for paved surfaces v = 16.1345(s)0.5 for unpaved surfaces CHANNEL FLOW Segment ID Total 12. Cross sectional flow area, a ft2 13. Wetted perimeter, P w ft 14. Hydraulic radius, r = a/P w Compute r ………. ft 15. Channel slope, s ft/ft 16. Manning's roughness coefficient, n …………… 17. v = (1.49r2/3s1/2)/n Compute v ………. ft/s 18. Flow length, L ft 19. Tt = (L/v)/3600 Compute Tt ………. hr 0.000 n source: 20. Total Time of Concentration/Travel Time hours = 0.27 minutes = 16.2 ……………………. ………………………………………………. ………………………… ……………………. …………………………….. ……………………………………… The Schneider Corporation ………………………… …………… ………………………… ………………………… …………………………….. …………………………….. Carey Grove Park Rehabilitation Carmel, Hamilton County, IN Existing Tc Worksheet 1S Existing Conditions 6S Off-Site Routing Diagram for Existing Conditions Prepared by Schneider Geomatics, Printed 4/28/2020 HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 2yr-24hr Rainfall=2.66"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 2HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Existing Conditions Runoff = 4.30 cfs @ 12.10 hrs, Volume= 0.301 af, Depth= 0.84" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr-24hr Rainfall=2.66" Area (ac) CN Description 0.544 98 Paved parking, HSG C 3.750 74 >75% Grass cover, Good, HSG C 4.294 77 Weighted Average 3.750 87.33% Pervious Area 0.544 12.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.2 Direct Entry, Subcatchment 1S: Existing Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)4 3 2 1 0 Type II 24-hr 2yr-24hr Rainfall=2.66" Runoff Area=4.294 ac Runoff Volume=0.301 af Runoff Depth=0.84" Tc=16.2 min CN=77 4.30 cfs Type II 24-hr 2yr-24hr Rainfall=2.66"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 3HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Existing Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.01 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.04 0.00 0.00 2.00 0.06 0.00 0.00 2.50 0.07 0.00 0.00 3.00 0.09 0.00 0.00 3.50 0.11 0.00 0.00 4.00 0.13 0.00 0.00 4.50 0.15 0.00 0.00 5.00 0.17 0.00 0.00 5.50 0.19 0.00 0.00 6.00 0.21 0.00 0.00 6.50 0.24 0.00 0.00 7.00 0.26 0.00 0.00 7.50 0.29 0.00 0.00 8.00 0.32 0.00 0.00 8.50 0.35 0.00 0.00 9.00 0.39 0.00 0.00 9.50 0.43 0.00 0.00 10.00 0.48 0.00 0.00 10.50 0.54 0.00 0.00 11.00 0.63 0.00 0.00 11.50 0.75 0.01 0.06 12.00 1.76 0.33 3.05 12.50 1.96 0.42 0.98 13.00 2.05 0.48 0.46 13.50 2.13 0.52 0.35 14.00 2.18 0.55 0.27 14.50 2.23 0.58 0.23 15.00 2.27 0.60 0.21 15.50 2.31 0.62 0.19 16.00 2.34 0.64 0.17 16.50 2.37 0.66 0.16 17.00 2.40 0.68 0.15 17.50 2.43 0.69 0.14 18.00 2.45 0.71 0.13 18.50 2.47 0.72 0.12 19.00 2.49 0.74 0.12 19.50 2.51 0.75 0.11 20.00 2.53 0.76 0.10 20.50 2.55 0.77 0.09 21.00 2.57 0.78 0.09 21.50 2.58 0.79 0.09 22.00 2.60 0.80 0.09 22.50 2.61 0.81 0.09 23.00 2.63 0.82 0.09 23.50 2.65 0.83 0.08 24.00 2.66 0.84 0.08 24.50 2.66 0.84 0.00 25.00 2.66 0.84 0.00 25.50 2.66 0.84 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 2.66 0.84 0.00 26.50 2.66 0.84 0.00 27.00 2.66 0.84 0.00 27.50 2.66 0.84 0.00 28.00 2.66 0.84 0.00 28.50 2.66 0.84 0.00 29.00 2.66 0.84 0.00 29.50 2.66 0.84 0.00 30.00 2.66 0.84 0.00 30.50 2.66 0.84 0.00 31.00 2.66 0.84 0.00 31.50 2.66 0.84 0.00 32.00 2.66 0.84 0.00 32.50 2.66 0.84 0.00 33.00 2.66 0.84 0.00 33.50 2.66 0.84 0.00 34.00 2.66 0.84 0.00 34.50 2.66 0.84 0.00 35.00 2.66 0.84 0.00 35.50 2.66 0.84 0.00 36.00 2.66 0.84 0.00 36.50 2.66 0.84 0.00 37.00 2.66 0.84 0.00 37.50 2.66 0.84 0.00 38.00 2.66 0.84 0.00 38.50 2.66 0.84 0.00 39.00 2.66 0.84 0.00 39.50 2.66 0.84 0.00 40.00 2.66 0.84 0.00 40.50 2.66 0.84 0.00 41.00 2.66 0.84 0.00 41.50 2.66 0.84 0.00 42.00 2.66 0.84 0.00 42.50 2.66 0.84 0.00 43.00 2.66 0.84 0.00 43.50 2.66 0.84 0.00 44.00 2.66 0.84 0.00 44.50 2.66 0.84 0.00 45.00 2.66 0.84 0.00 45.50 2.66 0.84 0.00 46.00 2.66 0.84 0.00 46.50 2.66 0.84 0.00 47.00 2.66 0.84 0.00 47.50 2.66 0.84 0.00 48.00 2.66 0.84 0.00 Type II 24-hr 2yr-24hr Rainfall=2.66"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 4HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 1.50 cfs @ 11.97 hrs, Volume= 0.069 af, Depth= 0.75" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr-24hr Rainfall=2.66" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)1 0 Type II 24-hr 2yr-24hr Rainfall=2.66" Runoff Area=1.105 ac Runoff Volume=0.069 af Runoff Depth=0.75" Tc=5.0 min CN=75 1.50 cfs Type II 24-hr 2yr-24hr Rainfall=2.66"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 5HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.01 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.04 0.00 0.00 2.00 0.06 0.00 0.00 2.50 0.07 0.00 0.00 3.00 0.09 0.00 0.00 3.50 0.11 0.00 0.00 4.00 0.13 0.00 0.00 4.50 0.15 0.00 0.00 5.00 0.17 0.00 0.00 5.50 0.19 0.00 0.00 6.00 0.21 0.00 0.00 6.50 0.24 0.00 0.00 7.00 0.26 0.00 0.00 7.50 0.29 0.00 0.00 8.00 0.32 0.00 0.00 8.50 0.35 0.00 0.00 9.00 0.39 0.00 0.00 9.50 0.43 0.00 0.00 10.00 0.48 0.00 0.00 10.50 0.54 0.00 0.00 11.00 0.63 0.00 0.00 11.50 0.75 0.00 0.01 12.00 1.76 0.27 1.35 12.50 1.96 0.36 0.15 13.00 2.05 0.41 0.10 13.50 2.13 0.44 0.07 14.00 2.18 0.47 0.06 14.50 2.23 0.50 0.05 15.00 2.27 0.52 0.05 15.50 2.31 0.54 0.04 16.00 2.34 0.56 0.04 16.50 2.37 0.58 0.04 17.00 2.40 0.59 0.03 17.50 2.43 0.61 0.03 18.00 2.45 0.62 0.03 18.50 2.47 0.63 0.03 19.00 2.49 0.65 0.03 19.50 2.51 0.66 0.03 20.00 2.53 0.67 0.02 20.50 2.55 0.68 0.02 21.00 2.57 0.69 0.02 21.50 2.58 0.70 0.02 22.00 2.60 0.71 0.02 22.50 2.61 0.72 0.02 23.00 2.63 0.73 0.02 23.50 2.65 0.74 0.02 24.00 2.66 0.75 0.02 24.50 2.66 0.75 0.00 25.00 2.66 0.75 0.00 25.50 2.66 0.75 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 2.66 0.75 0.00 26.50 2.66 0.75 0.00 27.00 2.66 0.75 0.00 27.50 2.66 0.75 0.00 28.00 2.66 0.75 0.00 28.50 2.66 0.75 0.00 29.00 2.66 0.75 0.00 29.50 2.66 0.75 0.00 30.00 2.66 0.75 0.00 30.50 2.66 0.75 0.00 31.00 2.66 0.75 0.00 31.50 2.66 0.75 0.00 32.00 2.66 0.75 0.00 32.50 2.66 0.75 0.00 33.00 2.66 0.75 0.00 33.50 2.66 0.75 0.00 34.00 2.66 0.75 0.00 34.50 2.66 0.75 0.00 35.00 2.66 0.75 0.00 35.50 2.66 0.75 0.00 36.00 2.66 0.75 0.00 36.50 2.66 0.75 0.00 37.00 2.66 0.75 0.00 37.50 2.66 0.75 0.00 38.00 2.66 0.75 0.00 38.50 2.66 0.75 0.00 39.00 2.66 0.75 0.00 39.50 2.66 0.75 0.00 40.00 2.66 0.75 0.00 40.50 2.66 0.75 0.00 41.00 2.66 0.75 0.00 41.50 2.66 0.75 0.00 42.00 2.66 0.75 0.00 42.50 2.66 0.75 0.00 43.00 2.66 0.75 0.00 43.50 2.66 0.75 0.00 44.00 2.66 0.75 0.00 44.50 2.66 0.75 0.00 45.00 2.66 0.75 0.00 45.50 2.66 0.75 0.00 46.00 2.66 0.75 0.00 46.50 2.66 0.75 0.00 47.00 2.66 0.75 0.00 47.50 2.66 0.75 0.00 48.00 2.66 0.75 0.00 Type II 24-hr 10yr-24hr Rainfall=3.83"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 6HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Existing Conditions Runoff = 8.93 cfs @ 12.09 hrs, Volume= 0.601 af, Depth= 1.68" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr-24hr Rainfall=3.83" Area (ac) CN Description 0.544 98 Paved parking, HSG C 3.750 74 >75% Grass cover, Good, HSG C 4.294 77 Weighted Average 3.750 87.33% Pervious Area 0.544 12.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.2 Direct Entry, Subcatchment 1S: Existing Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 10yr-24hr Rainfall=3.83" Runoff Area=4.294 ac Runoff Volume=0.601 af Runoff Depth=1.68" Tc=16.2 min CN=77 8.93 cfs Type II 24-hr 10yr-24hr Rainfall=3.83"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 7HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Existing Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.11 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.21 0.00 0.00 5.00 0.24 0.00 0.00 5.50 0.27 0.00 0.00 6.00 0.31 0.00 0.00 6.50 0.34 0.00 0.00 7.00 0.38 0.00 0.00 7.50 0.42 0.00 0.00 8.00 0.46 0.00 0.00 8.50 0.51 0.00 0.00 9.00 0.56 0.00 0.00 9.50 0.62 0.00 0.00 10.00 0.69 0.00 0.02 10.50 0.78 0.01 0.07 11.00 0.90 0.03 0.15 11.50 1.08 0.07 0.35 12.00 2.54 0.77 6.81 12.50 2.82 0.94 1.84 13.00 2.96 1.04 0.84 13.50 3.06 1.11 0.62 14.00 3.14 1.17 0.49 14.50 3.21 1.22 0.42 15.00 3.27 1.26 0.38 15.50 3.32 1.30 0.34 16.00 3.37 1.33 0.30 16.50 3.41 1.37 0.27 17.00 3.45 1.40 0.26 17.50 3.49 1.42 0.24 18.00 3.53 1.45 0.23 18.50 3.56 1.48 0.22 19.00 3.59 1.50 0.20 19.50 3.62 1.52 0.19 20.00 3.65 1.54 0.17 20.50 3.67 1.56 0.16 21.00 3.69 1.58 0.16 21.50 3.72 1.59 0.16 22.00 3.74 1.61 0.15 22.50 3.76 1.63 0.15 23.00 3.79 1.65 0.15 23.50 3.81 1.66 0.14 24.00 3.83 1.68 0.14 24.50 3.83 1.68 0.01 25.00 3.83 1.68 0.00 25.50 3.83 1.68 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 3.83 1.68 0.00 26.50 3.83 1.68 0.00 27.00 3.83 1.68 0.00 27.50 3.83 1.68 0.00 28.00 3.83 1.68 0.00 28.50 3.83 1.68 0.00 29.00 3.83 1.68 0.00 29.50 3.83 1.68 0.00 30.00 3.83 1.68 0.00 30.50 3.83 1.68 0.00 31.00 3.83 1.68 0.00 31.50 3.83 1.68 0.00 32.00 3.83 1.68 0.00 32.50 3.83 1.68 0.00 33.00 3.83 1.68 0.00 33.50 3.83 1.68 0.00 34.00 3.83 1.68 0.00 34.50 3.83 1.68 0.00 35.00 3.83 1.68 0.00 35.50 3.83 1.68 0.00 36.00 3.83 1.68 0.00 36.50 3.83 1.68 0.00 37.00 3.83 1.68 0.00 37.50 3.83 1.68 0.00 38.00 3.83 1.68 0.00 38.50 3.83 1.68 0.00 39.00 3.83 1.68 0.00 39.50 3.83 1.68 0.00 40.00 3.83 1.68 0.00 40.50 3.83 1.68 0.00 41.00 3.83 1.68 0.00 41.50 3.83 1.68 0.00 42.00 3.83 1.68 0.00 42.50 3.83 1.68 0.00 43.00 3.83 1.68 0.00 43.50 3.83 1.68 0.00 44.00 3.83 1.68 0.00 44.50 3.83 1.68 0.00 45.00 3.83 1.68 0.00 45.50 3.83 1.68 0.00 46.00 3.83 1.68 0.00 46.50 3.83 1.68 0.00 47.00 3.83 1.68 0.00 47.50 3.83 1.68 0.00 48.00 3.83 1.68 0.00 Type II 24-hr 10yr-24hr Rainfall=3.83"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 8HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 3.17 cfs @ 11.97 hrs, Volume= 0.142 af, Depth= 1.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr-24hr Rainfall=3.83" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)3 2 1 0 Type II 24-hr 10yr-24hr Rainfall=3.83" Runoff Area=1.105 ac Runoff Volume=0.142 af Runoff Depth=1.54" Tc=5.0 min CN=75 3.17 cfs Type II 24-hr 10yr-24hr Rainfall=3.83"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 9HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.11 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.21 0.00 0.00 5.00 0.24 0.00 0.00 5.50 0.27 0.00 0.00 6.00 0.31 0.00 0.00 6.50 0.34 0.00 0.00 7.00 0.38 0.00 0.00 7.50 0.42 0.00 0.00 8.00 0.46 0.00 0.00 8.50 0.51 0.00 0.00 9.00 0.56 0.00 0.00 9.50 0.62 0.00 0.00 10.00 0.69 0.00 0.00 10.50 0.78 0.00 0.01 11.00 0.90 0.02 0.03 11.50 1.08 0.05 0.09 12.00 2.54 0.67 2.78 12.50 2.82 0.84 0.28 13.00 2.96 0.93 0.18 13.50 3.06 1.00 0.14 14.00 3.14 1.05 0.11 14.50 3.21 1.10 0.10 15.00 3.27 1.14 0.09 15.50 3.32 1.18 0.08 16.00 3.37 1.21 0.07 16.50 3.41 1.24 0.07 17.00 3.45 1.27 0.06 17.50 3.49 1.30 0.06 18.00 3.53 1.32 0.06 18.50 3.56 1.34 0.05 19.00 3.59 1.37 0.05 19.50 3.62 1.39 0.04 20.00 3.65 1.41 0.04 20.50 3.67 1.42 0.04 21.00 3.69 1.44 0.04 21.50 3.72 1.46 0.04 22.00 3.74 1.48 0.04 22.50 3.76 1.49 0.04 23.00 3.79 1.51 0.04 23.50 3.81 1.52 0.04 24.00 3.83 1.54 0.03 24.50 3.83 1.54 0.00 25.00 3.83 1.54 0.00 25.50 3.83 1.54 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 3.83 1.54 0.00 26.50 3.83 1.54 0.00 27.00 3.83 1.54 0.00 27.50 3.83 1.54 0.00 28.00 3.83 1.54 0.00 28.50 3.83 1.54 0.00 29.00 3.83 1.54 0.00 29.50 3.83 1.54 0.00 30.00 3.83 1.54 0.00 30.50 3.83 1.54 0.00 31.00 3.83 1.54 0.00 31.50 3.83 1.54 0.00 32.00 3.83 1.54 0.00 32.50 3.83 1.54 0.00 33.00 3.83 1.54 0.00 33.50 3.83 1.54 0.00 34.00 3.83 1.54 0.00 34.50 3.83 1.54 0.00 35.00 3.83 1.54 0.00 35.50 3.83 1.54 0.00 36.00 3.83 1.54 0.00 36.50 3.83 1.54 0.00 37.00 3.83 1.54 0.00 37.50 3.83 1.54 0.00 38.00 3.83 1.54 0.00 38.50 3.83 1.54 0.00 39.00 3.83 1.54 0.00 39.50 3.83 1.54 0.00 40.00 3.83 1.54 0.00 40.50 3.83 1.54 0.00 41.00 3.83 1.54 0.00 41.50 3.83 1.54 0.00 42.00 3.83 1.54 0.00 42.50 3.83 1.54 0.00 43.00 3.83 1.54 0.00 43.50 3.83 1.54 0.00 44.00 3.83 1.54 0.00 44.50 3.83 1.54 0.00 45.00 3.83 1.54 0.00 45.50 3.83 1.54 0.00 46.00 3.83 1.54 0.00 46.50 3.83 1.54 0.00 47.00 3.83 1.54 0.00 47.50 3.83 1.54 0.00 48.00 3.83 1.54 0.00 Type II 24-hr 100yr-24hr Rainfall=6.46"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 10HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Existing Conditions Runoff = 20.77 cfs @ 12.08 hrs, Volume= 1.390 af, Depth= 3.88" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr-24hr Rainfall=6.46" Area (ac) CN Description 0.544 98 Paved parking, HSG C 3.750 74 >75% Grass cover, Good, HSG C 4.294 77 Weighted Average 3.750 87.33% Pervious Area 0.544 12.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 16.2 Direct Entry, Subcatchment 1S: Existing Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)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 100yr-24hr Rainfall=6.46" Runoff Area=4.294 ac Runoff Volume=1.390 af Runoff Depth=3.88" Tc=16.2 min CN=77 20.77 cfs Type II 24-hr 100yr-24hr Rainfall=6.46"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 11HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Existing Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.14 0.00 0.00 2.50 0.18 0.00 0.00 3.00 0.22 0.00 0.00 3.50 0.27 0.00 0.00 4.00 0.31 0.00 0.00 4.50 0.36 0.00 0.00 5.00 0.41 0.00 0.00 5.50 0.46 0.00 0.00 6.00 0.52 0.00 0.00 6.50 0.58 0.00 0.00 7.00 0.64 0.00 0.00 7.50 0.71 0.00 0.03 8.00 0.78 0.01 0.05 8.50 0.85 0.02 0.09 9.00 0.95 0.04 0.15 9.50 1.05 0.06 0.20 10.00 1.17 0.09 0.27 10.50 1.32 0.14 0.42 11.00 1.52 0.22 0.67 11.50 1.83 0.36 1.23 12.00 4.28 2.04 16.65 12.50 4.75 2.41 3.92 13.00 4.99 2.61 1.74 13.50 5.16 2.76 1.27 14.00 5.30 2.87 0.99 14.50 5.41 2.97 0.84 15.00 5.51 3.06 0.76 15.50 5.60 3.14 0.68 16.00 5.68 3.21 0.60 16.50 5.76 3.27 0.54 17.00 5.83 3.33 0.51 17.50 5.89 3.38 0.48 18.00 5.95 3.44 0.45 18.50 6.01 3.48 0.42 19.00 6.06 3.53 0.39 19.50 6.11 3.57 0.36 20.00 6.15 3.61 0.33 20.50 6.19 3.65 0.32 21.00 6.23 3.68 0.31 21.50 6.27 3.72 0.30 22.00 6.31 3.75 0.30 22.50 6.35 3.79 0.29 23.00 6.39 3.82 0.29 23.50 6.42 3.85 0.28 24.00 6.46 3.88 0.28 24.50 6.46 3.88 0.01 25.00 6.46 3.88 0.00 25.50 6.46 3.88 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 6.46 3.88 0.00 26.50 6.46 3.88 0.00 27.00 6.46 3.88 0.00 27.50 6.46 3.88 0.00 28.00 6.46 3.88 0.00 28.50 6.46 3.88 0.00 29.00 6.46 3.88 0.00 29.50 6.46 3.88 0.00 30.00 6.46 3.88 0.00 30.50 6.46 3.88 0.00 31.00 6.46 3.88 0.00 31.50 6.46 3.88 0.00 32.00 6.46 3.88 0.00 32.50 6.46 3.88 0.00 33.00 6.46 3.88 0.00 33.50 6.46 3.88 0.00 34.00 6.46 3.88 0.00 34.50 6.46 3.88 0.00 35.00 6.46 3.88 0.00 35.50 6.46 3.88 0.00 36.00 6.46 3.88 0.00 36.50 6.46 3.88 0.00 37.00 6.46 3.88 0.00 37.50 6.46 3.88 0.00 38.00 6.46 3.88 0.00 38.50 6.46 3.88 0.00 39.00 6.46 3.88 0.00 39.50 6.46 3.88 0.00 40.00 6.46 3.88 0.00 40.50 6.46 3.88 0.00 41.00 6.46 3.88 0.00 41.50 6.46 3.88 0.00 42.00 6.46 3.88 0.00 42.50 6.46 3.88 0.00 43.00 6.46 3.88 0.00 43.50 6.46 3.88 0.00 44.00 6.46 3.88 0.00 44.50 6.46 3.88 0.00 45.00 6.46 3.88 0.00 45.50 6.46 3.88 0.00 46.00 6.46 3.88 0.00 46.50 6.46 3.88 0.00 47.00 6.46 3.88 0.00 47.50 6.46 3.88 0.00 48.00 6.46 3.88 0.00 Type II 24-hr 100yr-24hr Rainfall=6.46"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 12HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 7.45 cfs @ 11.96 hrs, Volume= 0.339 af, Depth= 3.68" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr-24hr Rainfall=6.46" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)8 7 6 5 4 3 2 1 0 Type II 24-hr 100yr-24hr Rainfall=6.46" Runoff Area=1.105 ac Runoff Volume=0.339 af Runoff Depth=3.68" Tc=5.0 min CN=75 7.45 cfs Type II 24-hr 100yr-24hr Rainfall=6.46"Existing Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 13HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.14 0.00 0.00 2.50 0.18 0.00 0.00 3.00 0.22 0.00 0.00 3.50 0.27 0.00 0.00 4.00 0.31 0.00 0.00 4.50 0.36 0.00 0.00 5.00 0.41 0.00 0.00 5.50 0.46 0.00 0.00 6.00 0.52 0.00 0.00 6.50 0.58 0.00 0.00 7.00 0.64 0.00 0.00 7.50 0.71 0.00 0.00 8.00 0.78 0.00 0.01 8.50 0.85 0.01 0.02 9.00 0.95 0.02 0.03 9.50 1.05 0.04 0.04 10.00 1.17 0.07 0.07 10.50 1.32 0.11 0.11 11.00 1.52 0.17 0.18 11.50 1.83 0.30 0.35 12.00 4.28 1.88 6.37 12.50 4.75 2.25 0.60 13.00 4.99 2.44 0.38 13.50 5.16 2.58 0.29 14.00 5.30 2.69 0.23 14.50 5.41 2.79 0.20 15.00 5.51 2.87 0.18 15.50 5.60 2.95 0.16 16.00 5.68 3.02 0.14 16.50 5.76 3.08 0.13 17.00 5.83 3.13 0.13 17.50 5.89 3.19 0.12 18.00 5.95 3.24 0.11 18.50 6.01 3.29 0.10 19.00 6.06 3.33 0.10 19.50 6.11 3.37 0.09 20.00 6.15 3.41 0.08 20.50 6.19 3.45 0.08 21.00 6.23 3.48 0.08 21.50 6.27 3.52 0.08 22.00 6.31 3.55 0.07 22.50 6.35 3.58 0.07 23.00 6.39 3.61 0.07 23.50 6.42 3.65 0.07 24.00 6.46 3.68 0.07 24.50 6.46 3.68 0.00 25.00 6.46 3.68 0.00 25.50 6.46 3.68 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 6.46 3.68 0.00 26.50 6.46 3.68 0.00 27.00 6.46 3.68 0.00 27.50 6.46 3.68 0.00 28.00 6.46 3.68 0.00 28.50 6.46 3.68 0.00 29.00 6.46 3.68 0.00 29.50 6.46 3.68 0.00 30.00 6.46 3.68 0.00 30.50 6.46 3.68 0.00 31.00 6.46 3.68 0.00 31.50 6.46 3.68 0.00 32.00 6.46 3.68 0.00 32.50 6.46 3.68 0.00 33.00 6.46 3.68 0.00 33.50 6.46 3.68 0.00 34.00 6.46 3.68 0.00 34.50 6.46 3.68 0.00 35.00 6.46 3.68 0.00 35.50 6.46 3.68 0.00 36.00 6.46 3.68 0.00 36.50 6.46 3.68 0.00 37.00 6.46 3.68 0.00 37.50 6.46 3.68 0.00 38.00 6.46 3.68 0.00 38.50 6.46 3.68 0.00 39.00 6.46 3.68 0.00 39.50 6.46 3.68 0.00 40.00 6.46 3.68 0.00 40.50 6.46 3.68 0.00 41.00 6.46 3.68 0.00 41.50 6.46 3.68 0.00 42.00 6.46 3.68 0.00 42.50 6.46 3.68 0.00 43.00 6.46 3.68 0.00 43.50 6.46 3.68 0.00 44.00 6.46 3.68 0.00 44.50 6.46 3.68 0.00 45.00 6.46 3.68 0.00 45.50 6.46 3.68 0.00 46.00 6.46 3.68 0.00 46.50 6.46 3.68 0.00 47.00 6.46 3.68 0.00 47.50 6.46 3.68 0.00 48.00 6.46 3.68 0.00 APPENDIX D PROPOSED CONDITIONS Composite Curve Number Computation Worksheet Job No. By AKM Project Date 3/2/2020 Location Checked RRH Description Date 3/2/2020 Area ac/mi2/% YmsB2/YclA, C Grass Cover, Good 74 3.08 228.14 YmsB2/YclA, C Paved Area/Impervious Surface 98 1.21 118.58 4.29 346.72 =81Use CN Product of CN x area Totals = CN (weighted) = total product/total area = 346.72 = 80.76 4.29 10829.002 Carey Grove Park Carmel, Hamilton County, IN Proposed Basin CN Soil name and hydrologic group Cover description (cover type, treatment, and hydrologic condition; percent impervious; unconnected/connected impervious area ratio) CN Proposed CN Worksheet Composite Curve Number Computation Worksheet Job No. By AKM Project Date 3/2/2020 Location Checked RRH Description Date 3/2/2020 Area ac/mi2/% YmsB2/YclA, C Grass Cover, Good 74 1.06 78.44 YmsB2/YclA, C Paved Area/Impervious Surface 98 0.05 4.90 1.11 83.34 =75Use CN Product of CN x area Totals = CN (weighted) = total product/total area = 83.34 = 75.08 1.11 10829.002 Carey Grove Park Carmel, Hamilton County, IN Proposed Off-Site Basin CN Soil name and hydrologic group Cover description (cover type, treatment, and hydrologic condition; percent impervious; unconnected/connected impervious area ratio) CN Proposed Off-Site CN Worksheet Time of Concentration Worksheet By: AKM Project Name: Date: 3/2/2020 Location: Checked: RRH Description: Proposed Basin Time of Concentration Date: 3/2/2020 SHEET FLOW (Applicable to Tc only)Segment ID Total 1. Surface description Short Grass 2. Manning's roughness coefficient, n ………. 0.150 3. Flow length, L (total L < 300 ft)ft 100 4. two-year, 24-hour rainfall, P2 in 2.64 5. Land slope, s ft/ft 0.011 6. Tt = [0.007(nL)0.8]/[P2 0.5s0.4]Compute Tt ………. hr 0.228 0.228 n source: P2 source: SHALLOW CONCENTRATED FLOW Segment ID Total 7. Surface description (paved or unpaved) ………. Unpaved 8. Flow length, L ft 265 9. Watercourse slope, s ft/ft 0.011 10. Average velocity, v ft/s 1.80 11. Tt = (L/v)/3600 Compute Tt ………. hr 0.041 0.041 v = 20.3282(s)0.5 for paved surfaces v = 16.1345(s)0.5 for unpaved surfaces CHANNEL FLOW Segment ID Total 12. Cross sectional flow area, a ft2 13. Wetted perimeter, Pw ft 14. Hydraulic radius, r = a/Pw Compute r ………. ft 15. Channel slope, s ft/ft 16. Manning's roughness coefficient, n …………… 17. v = (1.49r2/3s1/2)/n Compute v ………. ft/s 18. Flow length, L ft 19. Tt = (L/v)/3600 Compute Tt ………. hr 0.000 n source: 20. Total Time of Concentration/Travel Time hours = 0.27 minutes = 16.2 ……………………………………… ……………………. ………………………………………………. …………………………….. …………………………….. ………………………… ………………………… ……………………. …………………………….. The Schneider Corporation Carey Grove Park Rehabilitation Carmel, Hamilton County, IN ………………………… …………… ………………………… Proposed Tc Worksheet 1S Proposed Conditions 6S Off-Site 4P Routing Diagram for Proposed Conditions Prepared by Schneider Geomatics, Printed 4/28/2020 HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 2HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Proposed Conditions Runoff = 5.58 cfs @ 12.09 hrs, Volume= 0.379 af, Depth= 1.06" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr-24hr Rainfall=2.66" Area (ac) CN Description 1.211 98 Paved parking, HSG B 3.083 74 >75% Grass cover, Good, HSG C 4.294 81 Weighted Average 3.083 71.80% Pervious Area 1.211 28.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 100 0.0110 0.12 Sheet Flow, Grass: Short n= 0.150 P2= 2.66" 2.6 265 0.0110 1.69 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 16.2 365 Total Subcatchment 1S: Proposed Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)6 5 4 3 2 1 0 Type II 24-hr 2yr-24hr Rainfall=2.66" Runoff Area=4.294 ac Runoff Volume=0.379 af Runoff Depth=1.06" Flow Length=365' Slope=0.0110 '/' Tc=16.2 min CN=81 5.58 cfs Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 3HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Proposed Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.01 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.04 0.00 0.00 2.00 0.06 0.00 0.00 2.50 0.07 0.00 0.00 3.00 0.09 0.00 0.00 3.50 0.11 0.00 0.00 4.00 0.13 0.00 0.00 4.50 0.15 0.00 0.00 5.00 0.17 0.00 0.00 5.50 0.19 0.00 0.00 6.00 0.21 0.00 0.00 6.50 0.24 0.00 0.00 7.00 0.26 0.00 0.00 7.50 0.29 0.00 0.00 8.00 0.32 0.00 0.00 8.50 0.35 0.00 0.00 9.00 0.39 0.00 0.00 9.50 0.43 0.00 0.00 10.00 0.48 0.00 0.00 10.50 0.54 0.00 0.02 11.00 0.63 0.01 0.06 11.50 0.75 0.03 0.18 12.00 1.76 0.46 4.17 12.50 1.96 0.58 1.18 13.00 2.05 0.64 0.55 13.50 2.13 0.69 0.40 14.00 2.18 0.72 0.32 14.50 2.23 0.75 0.27 15.00 2.27 0.78 0.25 15.50 2.31 0.81 0.22 16.00 2.34 0.83 0.20 16.50 2.37 0.85 0.18 17.00 2.40 0.87 0.17 17.50 2.43 0.89 0.16 18.00 2.45 0.91 0.15 18.50 2.47 0.92 0.14 19.00 2.49 0.94 0.13 19.50 2.51 0.95 0.12 20.00 2.53 0.97 0.11 20.50 2.55 0.98 0.11 21.00 2.57 0.99 0.10 21.50 2.58 1.00 0.10 22.00 2.60 1.01 0.10 22.50 2.61 1.02 0.10 23.00 2.63 1.04 0.10 23.50 2.65 1.05 0.10 24.00 2.66 1.06 0.09 24.50 2.66 1.06 0.00 25.00 2.66 1.06 0.00 25.50 2.66 1.06 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 2.66 1.06 0.00 26.50 2.66 1.06 0.00 27.00 2.66 1.06 0.00 27.50 2.66 1.06 0.00 28.00 2.66 1.06 0.00 28.50 2.66 1.06 0.00 29.00 2.66 1.06 0.00 29.50 2.66 1.06 0.00 30.00 2.66 1.06 0.00 30.50 2.66 1.06 0.00 31.00 2.66 1.06 0.00 31.50 2.66 1.06 0.00 32.00 2.66 1.06 0.00 32.50 2.66 1.06 0.00 33.00 2.66 1.06 0.00 33.50 2.66 1.06 0.00 34.00 2.66 1.06 0.00 34.50 2.66 1.06 0.00 35.00 2.66 1.06 0.00 35.50 2.66 1.06 0.00 36.00 2.66 1.06 0.00 36.50 2.66 1.06 0.00 37.00 2.66 1.06 0.00 37.50 2.66 1.06 0.00 38.00 2.66 1.06 0.00 38.50 2.66 1.06 0.00 39.00 2.66 1.06 0.00 39.50 2.66 1.06 0.00 40.00 2.66 1.06 0.00 40.50 2.66 1.06 0.00 41.00 2.66 1.06 0.00 41.50 2.66 1.06 0.00 42.00 2.66 1.06 0.00 42.50 2.66 1.06 0.00 43.00 2.66 1.06 0.00 43.50 2.66 1.06 0.00 44.00 2.66 1.06 0.00 44.50 2.66 1.06 0.00 45.00 2.66 1.06 0.00 45.50 2.66 1.06 0.00 46.00 2.66 1.06 0.00 46.50 2.66 1.06 0.00 47.00 2.66 1.06 0.00 47.50 2.66 1.06 0.00 48.00 2.66 1.06 0.00 Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 4HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 1.50 cfs @ 11.97 hrs, Volume= 0.069 af, Depth= 0.75" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr-24hr Rainfall=2.66" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)1 0 Type II 24-hr 2yr-24hr Rainfall=2.66" Runoff Area=1.105 ac Runoff Volume=0.069 af Runoff Depth=0.75" Tc=5.0 min CN=75 1.50 cfs Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 5HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.01 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.04 0.00 0.00 2.00 0.06 0.00 0.00 2.50 0.07 0.00 0.00 3.00 0.09 0.00 0.00 3.50 0.11 0.00 0.00 4.00 0.13 0.00 0.00 4.50 0.15 0.00 0.00 5.00 0.17 0.00 0.00 5.50 0.19 0.00 0.00 6.00 0.21 0.00 0.00 6.50 0.24 0.00 0.00 7.00 0.26 0.00 0.00 7.50 0.29 0.00 0.00 8.00 0.32 0.00 0.00 8.50 0.35 0.00 0.00 9.00 0.39 0.00 0.00 9.50 0.43 0.00 0.00 10.00 0.48 0.00 0.00 10.50 0.54 0.00 0.00 11.00 0.63 0.00 0.00 11.50 0.75 0.00 0.01 12.00 1.76 0.27 1.35 12.50 1.96 0.36 0.15 13.00 2.05 0.41 0.10 13.50 2.13 0.44 0.07 14.00 2.18 0.47 0.06 14.50 2.23 0.50 0.05 15.00 2.27 0.52 0.05 15.50 2.31 0.54 0.04 16.00 2.34 0.56 0.04 16.50 2.37 0.58 0.04 17.00 2.40 0.59 0.03 17.50 2.43 0.61 0.03 18.00 2.45 0.62 0.03 18.50 2.47 0.63 0.03 19.00 2.49 0.65 0.03 19.50 2.51 0.66 0.03 20.00 2.53 0.67 0.02 20.50 2.55 0.68 0.02 21.00 2.57 0.69 0.02 21.50 2.58 0.70 0.02 22.00 2.60 0.71 0.02 22.50 2.61 0.72 0.02 23.00 2.63 0.73 0.02 23.50 2.65 0.74 0.02 24.00 2.66 0.75 0.02 24.50 2.66 0.75 0.00 25.00 2.66 0.75 0.00 25.50 2.66 0.75 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 2.66 0.75 0.00 26.50 2.66 0.75 0.00 27.00 2.66 0.75 0.00 27.50 2.66 0.75 0.00 28.00 2.66 0.75 0.00 28.50 2.66 0.75 0.00 29.00 2.66 0.75 0.00 29.50 2.66 0.75 0.00 30.00 2.66 0.75 0.00 30.50 2.66 0.75 0.00 31.00 2.66 0.75 0.00 31.50 2.66 0.75 0.00 32.00 2.66 0.75 0.00 32.50 2.66 0.75 0.00 33.00 2.66 0.75 0.00 33.50 2.66 0.75 0.00 34.00 2.66 0.75 0.00 34.50 2.66 0.75 0.00 35.00 2.66 0.75 0.00 35.50 2.66 0.75 0.00 36.00 2.66 0.75 0.00 36.50 2.66 0.75 0.00 37.00 2.66 0.75 0.00 37.50 2.66 0.75 0.00 38.00 2.66 0.75 0.00 38.50 2.66 0.75 0.00 39.00 2.66 0.75 0.00 39.50 2.66 0.75 0.00 40.00 2.66 0.75 0.00 40.50 2.66 0.75 0.00 41.00 2.66 0.75 0.00 41.50 2.66 0.75 0.00 42.00 2.66 0.75 0.00 42.50 2.66 0.75 0.00 43.00 2.66 0.75 0.00 43.50 2.66 0.75 0.00 44.00 2.66 0.75 0.00 44.50 2.66 0.75 0.00 45.00 2.66 0.75 0.00 45.50 2.66 0.75 0.00 46.00 2.66 0.75 0.00 46.50 2.66 0.75 0.00 47.00 2.66 0.75 0.00 47.50 2.66 0.75 0.00 48.00 2.66 0.75 0.00 Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 6HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Pond 4P: Inflow Area = 4.294 ac, 28.20% Impervious, Inflow Depth = 1.06" for 2yr-24hr event Inflow = 5.58 cfs @ 12.09 hrs, Volume= 0.379 af Outflow = 0.44 cfs @ 13.34 hrs, Volume= 0.379 af, Atten= 92%, Lag= 74.9 min Primary = 0.44 cfs @ 13.34 hrs, Volume= 0.379 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Peak Elev= 846.71' @ 13.34 hrs Surf.Area= 0.278 ac Storage= 0.171 af Plug-Flow detention time= 176.8 min calculated for 0.379 af (100% of inflow) Center-of-Mass det. time= 176.8 min ( 1,032.1 - 855.3 ) Volume Invert Avail.Storage Storage Description #1 844.89' 2.364 af Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 844.89 0.000 0.000 0.000 845.00 0.001 0.000 0.000 846.00 0.085 0.043 0.043 847.00 0.358 0.221 0.265 848.00 0.694 0.526 0.791 849.00 0.786 0.740 1.531 850.00 0.881 0.834 2.364 Device Routing Invert Outlet Devices #1 Primary 844.89'3.6" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=0.44 cfs @ 13.34 hrs HW=846.71' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.44 cfs @ 6.22 fps) Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 7HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Pond 4P: Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)6 5 4 3 2 1 0 Inflow Area=4.294 ac Peak Elev=846.71' Storage=0.171 af 5.58 cfs 0.44 cfs Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 8HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Pond 4P: Time (hours) Inflow (cfs) Storage (acre-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0.000 844.89 0.00 1.00 0.00 0.000 844.89 0.00 2.00 0.00 0.000 844.89 0.00 3.00 0.00 0.000 844.89 0.00 4.00 0.00 0.000 844.89 0.00 5.00 0.00 0.000 844.89 0.00 6.00 0.00 0.000 844.89 0.00 7.00 0.00 0.000 844.89 0.00 8.00 0.00 0.000 844.89 0.00 9.00 0.00 0.000 844.89 0.00 10.00 0.00 0.000 844.89 0.00 11.00 0.06 0.000 845.05 0.05 12.00 4.17 0.038 845.94 0.32 13.00 0.55 0.170 846.70 0.44 14.00 0.32 0.168 846.69 0.44 15.00 0.25 0.155 846.65 0.43 16.00 0.20 0.138 846.58 0.42 17.00 0.17 0.118 846.49 0.41 18.00 0.15 0.098 846.40 0.40 19.00 0.13 0.078 846.28 0.38 20.00 0.11 0.058 846.14 0.36 21.00 0.10 0.038 845.94 0.32 22.00 0.10 0.022 845.71 0.28 23.00 0.10 0.009 845.46 0.22 24.00 0.09 0.002 845.21 0.14 25.00 0.00 0.000 844.89 0.00 26.00 0.00 0.000 844.89 0.00 27.00 0.00 0.000 844.89 0.00 28.00 0.00 0.000 844.89 0.00 29.00 0.00 0.000 844.89 0.00 30.00 0.00 0.000 844.89 0.00 31.00 0.00 0.000 844.89 0.00 32.00 0.00 0.000 844.89 0.00 33.00 0.00 0.000 844.89 0.00 34.00 0.00 0.000 844.89 0.00 35.00 0.00 0.000 844.89 0.00 36.00 0.00 0.000 844.89 0.00 37.00 0.00 0.000 844.89 0.00 38.00 0.00 0.000 844.89 0.00 39.00 0.00 0.000 844.89 0.00 40.00 0.00 0.000 844.89 0.00 41.00 0.00 0.000 844.89 0.00 42.00 0.00 0.000 844.89 0.00 43.00 0.00 0.000 844.89 0.00 44.00 0.00 0.000 844.89 0.00 45.00 0.00 0.000 844.89 0.00 46.00 0.00 0.000 844.89 0.00 47.00 0.00 0.000 844.89 0.00 48.00 0.00 0.000 844.89 0.00 Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 9HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Proposed Conditions Runoff = 10.61 cfs @ 12.08 hrs, Volume= 0.708 af, Depth= 1.98" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr-24hr Rainfall=3.83" Area (ac) CN Description 1.211 98 Paved parking, HSG B 3.083 74 >75% Grass cover, Good, HSG C 4.294 81 Weighted Average 3.083 71.80% Pervious Area 1.211 28.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 100 0.0110 0.12 Sheet Flow, Grass: Short n= 0.150 P2= 2.66" 2.6 265 0.0110 1.69 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 16.2 365 Total Subcatchment 1S: Proposed Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 10yr-24hr Rainfall=3.83" Runoff Area=4.294 ac Runoff Volume=0.708 af Runoff Depth=1.98" Flow Length=365' Slope=0.0110 '/' Tc=16.2 min CN=81 10.61 cfs Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 10HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Proposed Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.11 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.21 0.00 0.00 5.00 0.24 0.00 0.00 5.50 0.27 0.00 0.00 6.00 0.31 0.00 0.00 6.50 0.34 0.00 0.00 7.00 0.38 0.00 0.00 7.50 0.42 0.00 0.00 8.00 0.46 0.00 0.00 8.50 0.51 0.00 0.00 9.00 0.56 0.00 0.03 9.50 0.62 0.01 0.05 10.00 0.69 0.02 0.09 10.50 0.78 0.04 0.15 11.00 0.90 0.07 0.26 11.50 1.08 0.13 0.52 12.00 2.54 0.97 8.31 12.50 2.82 1.17 2.09 13.00 2.96 1.28 0.94 13.50 3.06 1.36 0.69 14.00 3.14 1.42 0.54 14.50 3.21 1.48 0.46 15.00 3.27 1.52 0.42 15.50 3.32 1.57 0.37 16.00 3.37 1.60 0.33 16.50 3.41 1.64 0.30 17.00 3.45 1.67 0.28 17.50 3.49 1.70 0.27 18.00 3.53 1.73 0.25 18.50 3.56 1.76 0.23 19.00 3.59 1.78 0.22 19.50 3.62 1.81 0.20 20.00 3.65 1.83 0.19 20.50 3.67 1.85 0.18 21.00 3.69 1.87 0.17 21.50 3.72 1.89 0.17 22.00 3.74 1.91 0.17 22.50 3.76 1.93 0.16 23.00 3.79 1.94 0.16 23.50 3.81 1.96 0.16 24.00 3.83 1.98 0.15 24.50 3.83 1.98 0.01 25.00 3.83 1.98 0.00 25.50 3.83 1.98 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 3.83 1.98 0.00 26.50 3.83 1.98 0.00 27.00 3.83 1.98 0.00 27.50 3.83 1.98 0.00 28.00 3.83 1.98 0.00 28.50 3.83 1.98 0.00 29.00 3.83 1.98 0.00 29.50 3.83 1.98 0.00 30.00 3.83 1.98 0.00 30.50 3.83 1.98 0.00 31.00 3.83 1.98 0.00 31.50 3.83 1.98 0.00 32.00 3.83 1.98 0.00 32.50 3.83 1.98 0.00 33.00 3.83 1.98 0.00 33.50 3.83 1.98 0.00 34.00 3.83 1.98 0.00 34.50 3.83 1.98 0.00 35.00 3.83 1.98 0.00 35.50 3.83 1.98 0.00 36.00 3.83 1.98 0.00 36.50 3.83 1.98 0.00 37.00 3.83 1.98 0.00 37.50 3.83 1.98 0.00 38.00 3.83 1.98 0.00 38.50 3.83 1.98 0.00 39.00 3.83 1.98 0.00 39.50 3.83 1.98 0.00 40.00 3.83 1.98 0.00 40.50 3.83 1.98 0.00 41.00 3.83 1.98 0.00 41.50 3.83 1.98 0.00 42.00 3.83 1.98 0.00 42.50 3.83 1.98 0.00 43.00 3.83 1.98 0.00 43.50 3.83 1.98 0.00 44.00 3.83 1.98 0.00 44.50 3.83 1.98 0.00 45.00 3.83 1.98 0.00 45.50 3.83 1.98 0.00 46.00 3.83 1.98 0.00 46.50 3.83 1.98 0.00 47.00 3.83 1.98 0.00 47.50 3.83 1.98 0.00 48.00 3.83 1.98 0.00 Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 11HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 3.17 cfs @ 11.97 hrs, Volume= 0.142 af, Depth= 1.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr-24hr Rainfall=3.83" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)3 2 1 0 Type II 24-hr 10yr-24hr Rainfall=3.83" Runoff Area=1.105 ac Runoff Volume=0.142 af Runoff Depth=1.54" Tc=5.0 min CN=75 3.17 cfs Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 12HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.11 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.21 0.00 0.00 5.00 0.24 0.00 0.00 5.50 0.27 0.00 0.00 6.00 0.31 0.00 0.00 6.50 0.34 0.00 0.00 7.00 0.38 0.00 0.00 7.50 0.42 0.00 0.00 8.00 0.46 0.00 0.00 8.50 0.51 0.00 0.00 9.00 0.56 0.00 0.00 9.50 0.62 0.00 0.00 10.00 0.69 0.00 0.00 10.50 0.78 0.00 0.01 11.00 0.90 0.02 0.03 11.50 1.08 0.05 0.09 12.00 2.54 0.67 2.78 12.50 2.82 0.84 0.28 13.00 2.96 0.93 0.18 13.50 3.06 1.00 0.14 14.00 3.14 1.05 0.11 14.50 3.21 1.10 0.10 15.00 3.27 1.14 0.09 15.50 3.32 1.18 0.08 16.00 3.37 1.21 0.07 16.50 3.41 1.24 0.07 17.00 3.45 1.27 0.06 17.50 3.49 1.30 0.06 18.00 3.53 1.32 0.06 18.50 3.56 1.34 0.05 19.00 3.59 1.37 0.05 19.50 3.62 1.39 0.04 20.00 3.65 1.41 0.04 20.50 3.67 1.42 0.04 21.00 3.69 1.44 0.04 21.50 3.72 1.46 0.04 22.00 3.74 1.48 0.04 22.50 3.76 1.49 0.04 23.00 3.79 1.51 0.04 23.50 3.81 1.52 0.04 24.00 3.83 1.54 0.03 24.50 3.83 1.54 0.00 25.00 3.83 1.54 0.00 25.50 3.83 1.54 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 3.83 1.54 0.00 26.50 3.83 1.54 0.00 27.00 3.83 1.54 0.00 27.50 3.83 1.54 0.00 28.00 3.83 1.54 0.00 28.50 3.83 1.54 0.00 29.00 3.83 1.54 0.00 29.50 3.83 1.54 0.00 30.00 3.83 1.54 0.00 30.50 3.83 1.54 0.00 31.00 3.83 1.54 0.00 31.50 3.83 1.54 0.00 32.00 3.83 1.54 0.00 32.50 3.83 1.54 0.00 33.00 3.83 1.54 0.00 33.50 3.83 1.54 0.00 34.00 3.83 1.54 0.00 34.50 3.83 1.54 0.00 35.00 3.83 1.54 0.00 35.50 3.83 1.54 0.00 36.00 3.83 1.54 0.00 36.50 3.83 1.54 0.00 37.00 3.83 1.54 0.00 37.50 3.83 1.54 0.00 38.00 3.83 1.54 0.00 38.50 3.83 1.54 0.00 39.00 3.83 1.54 0.00 39.50 3.83 1.54 0.00 40.00 3.83 1.54 0.00 40.50 3.83 1.54 0.00 41.00 3.83 1.54 0.00 41.50 3.83 1.54 0.00 42.00 3.83 1.54 0.00 42.50 3.83 1.54 0.00 43.00 3.83 1.54 0.00 43.50 3.83 1.54 0.00 44.00 3.83 1.54 0.00 44.50 3.83 1.54 0.00 45.00 3.83 1.54 0.00 45.50 3.83 1.54 0.00 46.00 3.83 1.54 0.00 46.50 3.83 1.54 0.00 47.00 3.83 1.54 0.00 47.50 3.83 1.54 0.00 48.00 3.83 1.54 0.00 Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 13HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Pond 4P: Inflow Area = 4.294 ac, 28.20% Impervious, Inflow Depth = 1.98" for 10yr-24hr event Inflow = 10.61 cfs @ 12.08 hrs, Volume= 0.708 af Outflow = 0.51 cfs @ 14.13 hrs, Volume= 0.708 af, Atten= 95%, Lag= 122.8 min Primary = 0.51 cfs @ 14.13 hrs, Volume= 0.708 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Peak Elev= 847.29' @ 14.13 hrs Surf.Area= 0.455 ac Storage= 0.382 af Plug-Flow detention time= 359.9 min calculated for 0.708 af (100% of inflow) Center-of-Mass det. time= 359.9 min ( 1,197.1 - 837.2 ) Volume Invert Avail.Storage Storage Description #1 844.89' 2.364 af Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 844.89 0.000 0.000 0.000 845.00 0.001 0.000 0.000 846.00 0.085 0.043 0.043 847.00 0.358 0.221 0.265 848.00 0.694 0.526 0.791 849.00 0.786 0.740 1.531 850.00 0.881 0.834 2.364 Device Routing Invert Outlet Devices #1 Primary 844.89'3.6" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=0.51 cfs @ 14.13 hrs HW=847.29' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.51 cfs @ 7.22 fps) Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 14HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Pond 4P: Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=4.294 ac Peak Elev=847.29' Storage=0.382 af 10.61 cfs 0.51 cfs Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 15HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Pond 4P: Time (hours) Inflow (cfs) Storage (acre-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0.000 844.89 0.00 1.00 0.00 0.000 844.89 0.00 2.00 0.00 0.000 844.89 0.00 3.00 0.00 0.000 844.89 0.00 4.00 0.00 0.000 844.89 0.00 5.00 0.00 0.000 844.89 0.00 6.00 0.00 0.000 844.89 0.00 7.00 0.00 0.000 844.89 0.00 8.00 0.00 0.000 844.89 0.00 9.00 0.03 0.000 845.00 0.02 10.00 0.09 0.000 845.09 0.07 11.00 0.26 0.004 845.28 0.17 12.00 8.31 0.098 846.40 0.40 13.00 0.94 0.366 847.25 0.51 14.00 0.54 0.382 847.29 0.51 15.00 0.42 0.378 847.28 0.51 16.00 0.33 0.367 847.25 0.51 17.00 0.28 0.350 847.22 0.50 18.00 0.25 0.330 847.17 0.50 19.00 0.22 0.309 847.12 0.49 20.00 0.19 0.285 847.06 0.48 21.00 0.17 0.260 846.99 0.48 22.00 0.17 0.235 846.92 0.47 23.00 0.16 0.211 846.84 0.46 24.00 0.15 0.186 846.76 0.45 25.00 0.00 0.153 846.64 0.43 26.00 0.00 0.118 846.49 0.41 27.00 0.00 0.086 846.33 0.39 28.00 0.00 0.055 846.12 0.35 29.00 0.00 0.028 845.80 0.30 30.00 0.00 0.007 845.39 0.20 31.00 0.00 0.000 844.89 0.00 32.00 0.00 0.000 844.89 0.00 33.00 0.00 0.000 844.89 0.00 34.00 0.00 0.000 844.89 0.00 35.00 0.00 0.000 844.89 0.00 36.00 0.00 0.000 844.89 0.00 37.00 0.00 0.000 844.89 0.00 38.00 0.00 0.000 844.89 0.00 39.00 0.00 0.000 844.89 0.00 40.00 0.00 0.000 844.89 0.00 41.00 0.00 0.000 844.89 0.00 42.00 0.00 0.000 844.89 0.00 43.00 0.00 0.000 844.89 0.00 44.00 0.00 0.000 844.89 0.00 45.00 0.00 0.000 844.89 0.00 46.00 0.00 0.000 844.89 0.00 47.00 0.00 0.000 844.89 0.00 48.00 0.00 0.000 844.89 0.00 Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 16HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Proposed Conditions Runoff = 22.84 cfs @ 12.08 hrs, Volume= 1.541 af, Depth= 4.31" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr-24hr Rainfall=6.46" Area (ac) CN Description 1.211 98 Paved parking, HSG B 3.083 74 >75% Grass cover, Good, HSG C 4.294 81 Weighted Average 3.083 71.80% Pervious Area 1.211 28.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 100 0.0110 0.12 Sheet Flow, Grass: Short n= 0.150 P2= 2.66" 2.6 265 0.0110 1.69 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 16.2 365 Total Subcatchment 1S: Proposed Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)25 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 100yr-24hr Rainfall=6.46" Runoff Area=4.294 ac Runoff Volume=1.541 af Runoff Depth=4.31" Flow Length=365' Slope=0.0110 '/' Tc=16.2 min CN=81 22.84 cfs Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 17HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Proposed Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.14 0.00 0.00 2.50 0.18 0.00 0.00 3.00 0.22 0.00 0.00 3.50 0.27 0.00 0.00 4.00 0.31 0.00 0.00 4.50 0.36 0.00 0.00 5.00 0.41 0.00 0.00 5.50 0.46 0.00 0.00 6.00 0.52 0.00 0.01 6.50 0.58 0.00 0.03 7.00 0.64 0.01 0.06 7.50 0.71 0.02 0.09 8.00 0.78 0.04 0.12 8.50 0.85 0.05 0.16 9.00 0.95 0.08 0.24 9.50 1.05 0.12 0.30 10.00 1.17 0.16 0.39 10.50 1.32 0.23 0.56 11.00 1.52 0.32 0.85 11.50 1.83 0.50 1.51 12.00 4.28 2.36 18.58 12.50 4.75 2.76 4.19 13.00 4.99 2.97 1.84 13.50 5.16 3.13 1.34 14.00 5.30 3.25 1.05 14.50 5.41 3.35 0.88 15.00 5.51 3.44 0.80 15.50 5.60 3.53 0.71 16.00 5.68 3.60 0.63 16.50 5.76 3.66 0.57 17.00 5.83 3.72 0.54 17.50 5.89 3.78 0.50 18.00 5.95 3.84 0.47 18.50 6.01 3.89 0.44 19.00 6.06 3.94 0.41 19.50 6.11 3.98 0.38 20.00 6.15 4.02 0.35 20.50 6.19 4.06 0.33 21.00 6.23 4.10 0.32 21.50 6.27 4.13 0.32 22.00 6.31 4.17 0.31 22.50 6.35 4.20 0.30 23.00 6.39 4.24 0.30 23.50 6.42 4.27 0.29 24.00 6.46 4.31 0.29 24.50 6.46 4.31 0.01 25.00 6.46 4.31 0.00 25.50 6.46 4.31 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 6.46 4.31 0.00 26.50 6.46 4.31 0.00 27.00 6.46 4.31 0.00 27.50 6.46 4.31 0.00 28.00 6.46 4.31 0.00 28.50 6.46 4.31 0.00 29.00 6.46 4.31 0.00 29.50 6.46 4.31 0.00 30.00 6.46 4.31 0.00 30.50 6.46 4.31 0.00 31.00 6.46 4.31 0.00 31.50 6.46 4.31 0.00 32.00 6.46 4.31 0.00 32.50 6.46 4.31 0.00 33.00 6.46 4.31 0.00 33.50 6.46 4.31 0.00 34.00 6.46 4.31 0.00 34.50 6.46 4.31 0.00 35.00 6.46 4.31 0.00 35.50 6.46 4.31 0.00 36.00 6.46 4.31 0.00 36.50 6.46 4.31 0.00 37.00 6.46 4.31 0.00 37.50 6.46 4.31 0.00 38.00 6.46 4.31 0.00 38.50 6.46 4.31 0.00 39.00 6.46 4.31 0.00 39.50 6.46 4.31 0.00 40.00 6.46 4.31 0.00 40.50 6.46 4.31 0.00 41.00 6.46 4.31 0.00 41.50 6.46 4.31 0.00 42.00 6.46 4.31 0.00 42.50 6.46 4.31 0.00 43.00 6.46 4.31 0.00 43.50 6.46 4.31 0.00 44.00 6.46 4.31 0.00 44.50 6.46 4.31 0.00 45.00 6.46 4.31 0.00 45.50 6.46 4.31 0.00 46.00 6.46 4.31 0.00 46.50 6.46 4.31 0.00 47.00 6.46 4.31 0.00 47.50 6.46 4.31 0.00 48.00 6.46 4.31 0.00 Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 18HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 7.45 cfs @ 11.96 hrs, Volume= 0.339 af, Depth= 3.68" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr-24hr Rainfall=6.46" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)8 7 6 5 4 3 2 1 0 Type II 24-hr 100yr-24hr Rainfall=6.46" Runoff Area=1.105 ac Runoff Volume=0.339 af Runoff Depth=3.68" Tc=5.0 min CN=75 7.45 cfs Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 19HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.14 0.00 0.00 2.50 0.18 0.00 0.00 3.00 0.22 0.00 0.00 3.50 0.27 0.00 0.00 4.00 0.31 0.00 0.00 4.50 0.36 0.00 0.00 5.00 0.41 0.00 0.00 5.50 0.46 0.00 0.00 6.00 0.52 0.00 0.00 6.50 0.58 0.00 0.00 7.00 0.64 0.00 0.00 7.50 0.71 0.00 0.00 8.00 0.78 0.00 0.01 8.50 0.85 0.01 0.02 9.00 0.95 0.02 0.03 9.50 1.05 0.04 0.04 10.00 1.17 0.07 0.07 10.50 1.32 0.11 0.11 11.00 1.52 0.17 0.18 11.50 1.83 0.30 0.35 12.00 4.28 1.88 6.37 12.50 4.75 2.25 0.60 13.00 4.99 2.44 0.38 13.50 5.16 2.58 0.29 14.00 5.30 2.69 0.23 14.50 5.41 2.79 0.20 15.00 5.51 2.87 0.18 15.50 5.60 2.95 0.16 16.00 5.68 3.02 0.14 16.50 5.76 3.08 0.13 17.00 5.83 3.13 0.13 17.50 5.89 3.19 0.12 18.00 5.95 3.24 0.11 18.50 6.01 3.29 0.10 19.00 6.06 3.33 0.10 19.50 6.11 3.37 0.09 20.00 6.15 3.41 0.08 20.50 6.19 3.45 0.08 21.00 6.23 3.48 0.08 21.50 6.27 3.52 0.08 22.00 6.31 3.55 0.07 22.50 6.35 3.58 0.07 23.00 6.39 3.61 0.07 23.50 6.42 3.65 0.07 24.00 6.46 3.68 0.07 24.50 6.46 3.68 0.00 25.00 6.46 3.68 0.00 25.50 6.46 3.68 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 6.46 3.68 0.00 26.50 6.46 3.68 0.00 27.00 6.46 3.68 0.00 27.50 6.46 3.68 0.00 28.00 6.46 3.68 0.00 28.50 6.46 3.68 0.00 29.00 6.46 3.68 0.00 29.50 6.46 3.68 0.00 30.00 6.46 3.68 0.00 30.50 6.46 3.68 0.00 31.00 6.46 3.68 0.00 31.50 6.46 3.68 0.00 32.00 6.46 3.68 0.00 32.50 6.46 3.68 0.00 33.00 6.46 3.68 0.00 33.50 6.46 3.68 0.00 34.00 6.46 3.68 0.00 34.50 6.46 3.68 0.00 35.00 6.46 3.68 0.00 35.50 6.46 3.68 0.00 36.00 6.46 3.68 0.00 36.50 6.46 3.68 0.00 37.00 6.46 3.68 0.00 37.50 6.46 3.68 0.00 38.00 6.46 3.68 0.00 38.50 6.46 3.68 0.00 39.00 6.46 3.68 0.00 39.50 6.46 3.68 0.00 40.00 6.46 3.68 0.00 40.50 6.46 3.68 0.00 41.00 6.46 3.68 0.00 41.50 6.46 3.68 0.00 42.00 6.46 3.68 0.00 42.50 6.46 3.68 0.00 43.00 6.46 3.68 0.00 43.50 6.46 3.68 0.00 44.00 6.46 3.68 0.00 44.50 6.46 3.68 0.00 45.00 6.46 3.68 0.00 45.50 6.46 3.68 0.00 46.00 6.46 3.68 0.00 46.50 6.46 3.68 0.00 47.00 6.46 3.68 0.00 47.50 6.46 3.68 0.00 48.00 6.46 3.68 0.00 Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 20HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Pond 4P: Inflow Area = 4.294 ac, 28.20% Impervious, Inflow Depth = 4.31" for 100yr-24hr event Inflow = 22.84 cfs @ 12.08 hrs, Volume= 1.541 af Outflow = 0.61 cfs @ 16.08 hrs, Volume= 1.541 af, Atten= 97%, Lag= 239.7 min Primary = 0.61 cfs @ 16.08 hrs, Volume= 1.541 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Peak Elev= 848.28' @ 16.08 hrs Surf.Area= 0.719 ac Storage= 0.985 af Plug-Flow detention time= 753.3 min calculated for 1.540 af (100% of inflow) Center-of-Mass det. time= 753.4 min ( 1,568.4 - 815.0 ) Volume Invert Avail.Storage Storage Description #1 844.89' 2.364 af Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 844.89 0.000 0.000 0.000 845.00 0.001 0.000 0.000 846.00 0.085 0.043 0.043 847.00 0.358 0.221 0.265 848.00 0.694 0.526 0.791 849.00 0.786 0.740 1.531 850.00 0.881 0.834 2.364 Device Routing Invert Outlet Devices #1 Primary 844.89'3.6" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=0.61 cfs @ 16.08 hrs HW=848.28' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.61 cfs @ 8.66 fps) Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 21HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Pond 4P: Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=4.294 ac Peak Elev=848.28' Storage=0.985 af 22.84 cfs 0.61 cfs Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions Printed 4/28/2020Prepared by Schneider Geomatics Page 22HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Pond 4P: Time (hours) Inflow (cfs) Storage (acre-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0.000 844.89 0.00 1.00 0.00 0.000 844.89 0.00 2.00 0.00 0.000 844.89 0.00 3.00 0.00 0.000 844.89 0.00 4.00 0.00 0.000 844.89 0.00 5.00 0.00 0.000 844.89 0.00 6.00 0.01 0.000 844.94 0.01 7.00 0.06 0.000 845.05 0.05 8.00 0.12 0.001 845.14 0.11 9.00 0.24 0.004 845.29 0.17 10.00 0.39 0.012 845.52 0.24 11.00 0.85 0.037 845.93 0.32 12.00 18.58 0.295 847.08 0.49 13.00 1.84 0.890 848.14 0.60 14.00 1.05 0.953 848.23 0.61 15.00 0.80 0.977 848.26 0.61 16.00 0.63 0.985 848.28 0.61 17.00 0.54 0.982 848.27 0.61 18.00 0.47 0.973 848.26 0.61 19.00 0.41 0.959 848.24 0.61 20.00 0.35 0.940 848.21 0.61 21.00 0.32 0.918 848.18 0.60 22.00 0.31 0.894 848.15 0.60 23.00 0.30 0.870 848.11 0.60 24.00 0.29 0.845 848.08 0.59 25.00 0.00 0.802 848.02 0.59 26.00 0.00 0.754 847.95 0.58 27.00 0.00 0.706 847.87 0.57 28.00 0.00 0.659 847.80 0.57 29.00 0.00 0.613 847.73 0.56 30.00 0.00 0.567 847.65 0.55 31.00 0.00 0.522 847.57 0.54 32.00 0.00 0.478 847.48 0.53 33.00 0.00 0.434 847.40 0.52 34.00 0.00 0.391 847.31 0.51 35.00 0.00 0.349 847.21 0.50 36.00 0.00 0.308 847.12 0.49 37.00 0.00 0.268 847.01 0.48 38.00 0.00 0.229 846.90 0.46 39.00 0.00 0.192 846.78 0.45 40.00 0.00 0.155 846.65 0.43 41.00 0.00 0.120 846.50 0.41 42.00 0.00 0.087 846.34 0.39 43.00 0.00 0.057 846.13 0.36 44.00 0.00 0.029 845.82 0.30 45.00 0.00 0.008 845.42 0.21 46.00 0.00 0.000 844.89 0.00 47.00 0.00 0.000 844.89 0.00 48.00 0.00 0.000 844.89 0.00 1S Proposed Conditions 6S Off-Site 4P Routing Diagram for Proposed Conditions (6-inch Orifice) Prepared by Schneider Geomatics, Printed 4/28/2020 HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Subcat Reach Pond Link Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 2HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Proposed Conditions Runoff = 5.58 cfs @ 12.09 hrs, Volume= 0.379 af, Depth= 1.06" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr-24hr Rainfall=2.66" Area (ac) CN Description 1.211 98 Paved parking, HSG B 3.083 74 >75% Grass cover, Good, HSG C 4.294 81 Weighted Average 3.083 71.80% Pervious Area 1.211 28.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 100 0.0110 0.12 Sheet Flow, Grass: Short n= 0.150 P2= 2.66" 2.6 265 0.0110 1.69 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 16.2 365 Total Subcatchment 1S: Proposed Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)6 5 4 3 2 1 0 Type II 24-hr 2yr-24hr Rainfall=2.66" Runoff Area=4.294 ac Runoff Volume=0.379 af Runoff Depth=1.06" Flow Length=365' Slope=0.0110 '/' Tc=16.2 min CN=81 5.58 cfs Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 3HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Proposed Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.01 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.04 0.00 0.00 2.00 0.06 0.00 0.00 2.50 0.07 0.00 0.00 3.00 0.09 0.00 0.00 3.50 0.11 0.00 0.00 4.00 0.13 0.00 0.00 4.50 0.15 0.00 0.00 5.00 0.17 0.00 0.00 5.50 0.19 0.00 0.00 6.00 0.21 0.00 0.00 6.50 0.24 0.00 0.00 7.00 0.26 0.00 0.00 7.50 0.29 0.00 0.00 8.00 0.32 0.00 0.00 8.50 0.35 0.00 0.00 9.00 0.39 0.00 0.00 9.50 0.43 0.00 0.00 10.00 0.48 0.00 0.00 10.50 0.54 0.00 0.02 11.00 0.63 0.01 0.06 11.50 0.75 0.03 0.18 12.00 1.76 0.46 4.17 12.50 1.96 0.58 1.18 13.00 2.05 0.64 0.55 13.50 2.13 0.69 0.40 14.00 2.18 0.72 0.32 14.50 2.23 0.75 0.27 15.00 2.27 0.78 0.25 15.50 2.31 0.81 0.22 16.00 2.34 0.83 0.20 16.50 2.37 0.85 0.18 17.00 2.40 0.87 0.17 17.50 2.43 0.89 0.16 18.00 2.45 0.91 0.15 18.50 2.47 0.92 0.14 19.00 2.49 0.94 0.13 19.50 2.51 0.95 0.12 20.00 2.53 0.97 0.11 20.50 2.55 0.98 0.11 21.00 2.57 0.99 0.10 21.50 2.58 1.00 0.10 22.00 2.60 1.01 0.10 22.50 2.61 1.02 0.10 23.00 2.63 1.04 0.10 23.50 2.65 1.05 0.10 24.00 2.66 1.06 0.09 24.50 2.66 1.06 0.00 25.00 2.66 1.06 0.00 25.50 2.66 1.06 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 2.66 1.06 0.00 26.50 2.66 1.06 0.00 27.00 2.66 1.06 0.00 27.50 2.66 1.06 0.00 28.00 2.66 1.06 0.00 28.50 2.66 1.06 0.00 29.00 2.66 1.06 0.00 29.50 2.66 1.06 0.00 30.00 2.66 1.06 0.00 30.50 2.66 1.06 0.00 31.00 2.66 1.06 0.00 31.50 2.66 1.06 0.00 32.00 2.66 1.06 0.00 32.50 2.66 1.06 0.00 33.00 2.66 1.06 0.00 33.50 2.66 1.06 0.00 34.00 2.66 1.06 0.00 34.50 2.66 1.06 0.00 35.00 2.66 1.06 0.00 35.50 2.66 1.06 0.00 36.00 2.66 1.06 0.00 36.50 2.66 1.06 0.00 37.00 2.66 1.06 0.00 37.50 2.66 1.06 0.00 38.00 2.66 1.06 0.00 38.50 2.66 1.06 0.00 39.00 2.66 1.06 0.00 39.50 2.66 1.06 0.00 40.00 2.66 1.06 0.00 40.50 2.66 1.06 0.00 41.00 2.66 1.06 0.00 41.50 2.66 1.06 0.00 42.00 2.66 1.06 0.00 42.50 2.66 1.06 0.00 43.00 2.66 1.06 0.00 43.50 2.66 1.06 0.00 44.00 2.66 1.06 0.00 44.50 2.66 1.06 0.00 45.00 2.66 1.06 0.00 45.50 2.66 1.06 0.00 46.00 2.66 1.06 0.00 46.50 2.66 1.06 0.00 47.00 2.66 1.06 0.00 47.50 2.66 1.06 0.00 48.00 2.66 1.06 0.00 Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 4HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 1.50 cfs @ 11.97 hrs, Volume= 0.069 af, Depth= 0.75" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr-24hr Rainfall=2.66" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)1 0 Type II 24-hr 2yr-24hr Rainfall=2.66" Runoff Area=1.105 ac Runoff Volume=0.069 af Runoff Depth=0.75" Tc=5.0 min CN=75 1.50 cfs Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 5HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.01 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.04 0.00 0.00 2.00 0.06 0.00 0.00 2.50 0.07 0.00 0.00 3.00 0.09 0.00 0.00 3.50 0.11 0.00 0.00 4.00 0.13 0.00 0.00 4.50 0.15 0.00 0.00 5.00 0.17 0.00 0.00 5.50 0.19 0.00 0.00 6.00 0.21 0.00 0.00 6.50 0.24 0.00 0.00 7.00 0.26 0.00 0.00 7.50 0.29 0.00 0.00 8.00 0.32 0.00 0.00 8.50 0.35 0.00 0.00 9.00 0.39 0.00 0.00 9.50 0.43 0.00 0.00 10.00 0.48 0.00 0.00 10.50 0.54 0.00 0.00 11.00 0.63 0.00 0.00 11.50 0.75 0.00 0.01 12.00 1.76 0.27 1.35 12.50 1.96 0.36 0.15 13.00 2.05 0.41 0.10 13.50 2.13 0.44 0.07 14.00 2.18 0.47 0.06 14.50 2.23 0.50 0.05 15.00 2.27 0.52 0.05 15.50 2.31 0.54 0.04 16.00 2.34 0.56 0.04 16.50 2.37 0.58 0.04 17.00 2.40 0.59 0.03 17.50 2.43 0.61 0.03 18.00 2.45 0.62 0.03 18.50 2.47 0.63 0.03 19.00 2.49 0.65 0.03 19.50 2.51 0.66 0.03 20.00 2.53 0.67 0.02 20.50 2.55 0.68 0.02 21.00 2.57 0.69 0.02 21.50 2.58 0.70 0.02 22.00 2.60 0.71 0.02 22.50 2.61 0.72 0.02 23.00 2.63 0.73 0.02 23.50 2.65 0.74 0.02 24.00 2.66 0.75 0.02 24.50 2.66 0.75 0.00 25.00 2.66 0.75 0.00 25.50 2.66 0.75 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 2.66 0.75 0.00 26.50 2.66 0.75 0.00 27.00 2.66 0.75 0.00 27.50 2.66 0.75 0.00 28.00 2.66 0.75 0.00 28.50 2.66 0.75 0.00 29.00 2.66 0.75 0.00 29.50 2.66 0.75 0.00 30.00 2.66 0.75 0.00 30.50 2.66 0.75 0.00 31.00 2.66 0.75 0.00 31.50 2.66 0.75 0.00 32.00 2.66 0.75 0.00 32.50 2.66 0.75 0.00 33.00 2.66 0.75 0.00 33.50 2.66 0.75 0.00 34.00 2.66 0.75 0.00 34.50 2.66 0.75 0.00 35.00 2.66 0.75 0.00 35.50 2.66 0.75 0.00 36.00 2.66 0.75 0.00 36.50 2.66 0.75 0.00 37.00 2.66 0.75 0.00 37.50 2.66 0.75 0.00 38.00 2.66 0.75 0.00 38.50 2.66 0.75 0.00 39.00 2.66 0.75 0.00 39.50 2.66 0.75 0.00 40.00 2.66 0.75 0.00 40.50 2.66 0.75 0.00 41.00 2.66 0.75 0.00 41.50 2.66 0.75 0.00 42.00 2.66 0.75 0.00 42.50 2.66 0.75 0.00 43.00 2.66 0.75 0.00 43.50 2.66 0.75 0.00 44.00 2.66 0.75 0.00 44.50 2.66 0.75 0.00 45.00 2.66 0.75 0.00 45.50 2.66 0.75 0.00 46.00 2.66 0.75 0.00 46.50 2.66 0.75 0.00 47.00 2.66 0.75 0.00 47.50 2.66 0.75 0.00 48.00 2.66 0.75 0.00 Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 6HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Pond 4P: Inflow Area = 4.294 ac, 28.20% Impervious, Inflow Depth = 1.06" for 2yr-24hr event Inflow = 5.58 cfs @ 12.09 hrs, Volume= 0.379 af Outflow = 1.11 cfs @ 12.53 hrs, Volume= 0.379 af, Atten= 80%, Lag= 26.2 min Primary = 1.11 cfs @ 12.53 hrs, Volume= 0.379 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Peak Elev= 846.52' @ 12.53 hrs Surf.Area= 0.226 ac Storage= 0.123 af Plug-Flow detention time= 38.0 min calculated for 0.379 af (100% of inflow) Center-of-Mass det. time= 38.0 min ( 893.3 - 855.3 ) Volume Invert Avail.Storage Storage Description #1 844.89' 2.364 af Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 844.89 0.000 0.000 0.000 845.00 0.001 0.000 0.000 846.00 0.085 0.043 0.043 847.00 0.358 0.221 0.265 848.00 0.694 0.526 0.791 849.00 0.786 0.740 1.531 850.00 0.881 0.834 2.364 Device Routing Invert Outlet Devices #1 Primary 844.89'6.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=1.11 cfs @ 12.53 hrs HW=846.52' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.11 cfs @ 5.65 fps) Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 7HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Pond 4P: Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)6 5 4 3 2 1 0 Inflow Area=4.294 ac Peak Elev=846.52' Storage=0.123 af 5.58 cfs 1.11 cfs Type II 24-hr 2yr-24hr Rainfall=2.66"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 8HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Pond 4P: Time (hours) Inflow (cfs) Storage (acre-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0.000 844.89 0.00 1.00 0.00 0.000 844.89 0.00 2.00 0.00 0.000 844.89 0.00 3.00 0.00 0.000 844.89 0.00 4.00 0.00 0.000 844.89 0.00 5.00 0.00 0.000 844.89 0.00 6.00 0.00 0.000 844.89 0.00 7.00 0.00 0.000 844.89 0.00 8.00 0.00 0.000 844.89 0.00 9.00 0.00 0.000 844.89 0.00 10.00 0.00 0.000 844.89 0.00 11.00 0.06 0.000 845.03 0.06 12.00 4.17 0.031 845.84 0.79 13.00 0.55 0.109 846.45 1.08 14.00 0.32 0.058 846.15 0.95 15.00 0.25 0.015 845.58 0.62 16.00 0.20 0.002 845.18 0.21 17.00 0.17 0.001 845.14 0.17 18.00 0.15 0.001 845.13 0.15 19.00 0.13 0.001 845.11 0.13 20.00 0.11 0.001 845.09 0.11 21.00 0.10 0.000 845.08 0.11 22.00 0.10 0.000 845.08 0.10 23.00 0.10 0.000 845.07 0.10 24.00 0.09 0.000 845.07 0.09 25.00 0.00 0.000 844.89 0.00 26.00 0.00 0.000 844.89 0.00 27.00 0.00 0.000 844.89 0.00 28.00 0.00 0.000 844.89 0.00 29.00 0.00 0.000 844.89 0.00 30.00 0.00 0.000 844.89 0.00 31.00 0.00 0.000 844.89 0.00 32.00 0.00 0.000 844.89 0.00 33.00 0.00 0.000 844.89 0.00 34.00 0.00 0.000 844.89 0.00 35.00 0.00 0.000 844.89 0.00 36.00 0.00 0.000 844.89 0.00 37.00 0.00 0.000 844.89 0.00 38.00 0.00 0.000 844.89 0.00 39.00 0.00 0.000 844.89 0.00 40.00 0.00 0.000 844.89 0.00 41.00 0.00 0.000 844.89 0.00 42.00 0.00 0.000 844.89 0.00 43.00 0.00 0.000 844.89 0.00 44.00 0.00 0.000 844.89 0.00 45.00 0.00 0.000 844.89 0.00 46.00 0.00 0.000 844.89 0.00 47.00 0.00 0.000 844.89 0.00 48.00 0.00 0.000 844.89 0.00 Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 9HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Proposed Conditions Runoff = 10.61 cfs @ 12.08 hrs, Volume= 0.708 af, Depth= 1.98" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr-24hr Rainfall=3.83" Area (ac) CN Description 1.211 98 Paved parking, HSG B 3.083 74 >75% Grass cover, Good, HSG C 4.294 81 Weighted Average 3.083 71.80% Pervious Area 1.211 28.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 100 0.0110 0.12 Sheet Flow, Grass: Short n= 0.150 P2= 2.66" 2.6 265 0.0110 1.69 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 16.2 365 Total Subcatchment 1S: Proposed Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 10yr-24hr Rainfall=3.83" Runoff Area=4.294 ac Runoff Volume=0.708 af Runoff Depth=1.98" Flow Length=365' Slope=0.0110 '/' Tc=16.2 min CN=81 10.61 cfs Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 10HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Proposed Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.11 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.21 0.00 0.00 5.00 0.24 0.00 0.00 5.50 0.27 0.00 0.00 6.00 0.31 0.00 0.00 6.50 0.34 0.00 0.00 7.00 0.38 0.00 0.00 7.50 0.42 0.00 0.00 8.00 0.46 0.00 0.00 8.50 0.51 0.00 0.00 9.00 0.56 0.00 0.03 9.50 0.62 0.01 0.05 10.00 0.69 0.02 0.09 10.50 0.78 0.04 0.15 11.00 0.90 0.07 0.26 11.50 1.08 0.13 0.52 12.00 2.54 0.97 8.31 12.50 2.82 1.17 2.09 13.00 2.96 1.28 0.94 13.50 3.06 1.36 0.69 14.00 3.14 1.42 0.54 14.50 3.21 1.48 0.46 15.00 3.27 1.52 0.42 15.50 3.32 1.57 0.37 16.00 3.37 1.60 0.33 16.50 3.41 1.64 0.30 17.00 3.45 1.67 0.28 17.50 3.49 1.70 0.27 18.00 3.53 1.73 0.25 18.50 3.56 1.76 0.23 19.00 3.59 1.78 0.22 19.50 3.62 1.81 0.20 20.00 3.65 1.83 0.19 20.50 3.67 1.85 0.18 21.00 3.69 1.87 0.17 21.50 3.72 1.89 0.17 22.00 3.74 1.91 0.17 22.50 3.76 1.93 0.16 23.00 3.79 1.94 0.16 23.50 3.81 1.96 0.16 24.00 3.83 1.98 0.15 24.50 3.83 1.98 0.01 25.00 3.83 1.98 0.00 25.50 3.83 1.98 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 3.83 1.98 0.00 26.50 3.83 1.98 0.00 27.00 3.83 1.98 0.00 27.50 3.83 1.98 0.00 28.00 3.83 1.98 0.00 28.50 3.83 1.98 0.00 29.00 3.83 1.98 0.00 29.50 3.83 1.98 0.00 30.00 3.83 1.98 0.00 30.50 3.83 1.98 0.00 31.00 3.83 1.98 0.00 31.50 3.83 1.98 0.00 32.00 3.83 1.98 0.00 32.50 3.83 1.98 0.00 33.00 3.83 1.98 0.00 33.50 3.83 1.98 0.00 34.00 3.83 1.98 0.00 34.50 3.83 1.98 0.00 35.00 3.83 1.98 0.00 35.50 3.83 1.98 0.00 36.00 3.83 1.98 0.00 36.50 3.83 1.98 0.00 37.00 3.83 1.98 0.00 37.50 3.83 1.98 0.00 38.00 3.83 1.98 0.00 38.50 3.83 1.98 0.00 39.00 3.83 1.98 0.00 39.50 3.83 1.98 0.00 40.00 3.83 1.98 0.00 40.50 3.83 1.98 0.00 41.00 3.83 1.98 0.00 41.50 3.83 1.98 0.00 42.00 3.83 1.98 0.00 42.50 3.83 1.98 0.00 43.00 3.83 1.98 0.00 43.50 3.83 1.98 0.00 44.00 3.83 1.98 0.00 44.50 3.83 1.98 0.00 45.00 3.83 1.98 0.00 45.50 3.83 1.98 0.00 46.00 3.83 1.98 0.00 46.50 3.83 1.98 0.00 47.00 3.83 1.98 0.00 47.50 3.83 1.98 0.00 48.00 3.83 1.98 0.00 Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 11HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 3.17 cfs @ 11.97 hrs, Volume= 0.142 af, Depth= 1.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr-24hr Rainfall=3.83" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)3 2 1 0 Type II 24-hr 10yr-24hr Rainfall=3.83" Runoff Area=1.105 ac Runoff Volume=0.142 af Runoff Depth=1.54" Tc=5.0 min CN=75 3.17 cfs Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 12HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.11 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.21 0.00 0.00 5.00 0.24 0.00 0.00 5.50 0.27 0.00 0.00 6.00 0.31 0.00 0.00 6.50 0.34 0.00 0.00 7.00 0.38 0.00 0.00 7.50 0.42 0.00 0.00 8.00 0.46 0.00 0.00 8.50 0.51 0.00 0.00 9.00 0.56 0.00 0.00 9.50 0.62 0.00 0.00 10.00 0.69 0.00 0.00 10.50 0.78 0.00 0.01 11.00 0.90 0.02 0.03 11.50 1.08 0.05 0.09 12.00 2.54 0.67 2.78 12.50 2.82 0.84 0.28 13.00 2.96 0.93 0.18 13.50 3.06 1.00 0.14 14.00 3.14 1.05 0.11 14.50 3.21 1.10 0.10 15.00 3.27 1.14 0.09 15.50 3.32 1.18 0.08 16.00 3.37 1.21 0.07 16.50 3.41 1.24 0.07 17.00 3.45 1.27 0.06 17.50 3.49 1.30 0.06 18.00 3.53 1.32 0.06 18.50 3.56 1.34 0.05 19.00 3.59 1.37 0.05 19.50 3.62 1.39 0.04 20.00 3.65 1.41 0.04 20.50 3.67 1.42 0.04 21.00 3.69 1.44 0.04 21.50 3.72 1.46 0.04 22.00 3.74 1.48 0.04 22.50 3.76 1.49 0.04 23.00 3.79 1.51 0.04 23.50 3.81 1.52 0.04 24.00 3.83 1.54 0.03 24.50 3.83 1.54 0.00 25.00 3.83 1.54 0.00 25.50 3.83 1.54 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 3.83 1.54 0.00 26.50 3.83 1.54 0.00 27.00 3.83 1.54 0.00 27.50 3.83 1.54 0.00 28.00 3.83 1.54 0.00 28.50 3.83 1.54 0.00 29.00 3.83 1.54 0.00 29.50 3.83 1.54 0.00 30.00 3.83 1.54 0.00 30.50 3.83 1.54 0.00 31.00 3.83 1.54 0.00 31.50 3.83 1.54 0.00 32.00 3.83 1.54 0.00 32.50 3.83 1.54 0.00 33.00 3.83 1.54 0.00 33.50 3.83 1.54 0.00 34.00 3.83 1.54 0.00 34.50 3.83 1.54 0.00 35.00 3.83 1.54 0.00 35.50 3.83 1.54 0.00 36.00 3.83 1.54 0.00 36.50 3.83 1.54 0.00 37.00 3.83 1.54 0.00 37.50 3.83 1.54 0.00 38.00 3.83 1.54 0.00 38.50 3.83 1.54 0.00 39.00 3.83 1.54 0.00 39.50 3.83 1.54 0.00 40.00 3.83 1.54 0.00 40.50 3.83 1.54 0.00 41.00 3.83 1.54 0.00 41.50 3.83 1.54 0.00 42.00 3.83 1.54 0.00 42.50 3.83 1.54 0.00 43.00 3.83 1.54 0.00 43.50 3.83 1.54 0.00 44.00 3.83 1.54 0.00 44.50 3.83 1.54 0.00 45.00 3.83 1.54 0.00 45.50 3.83 1.54 0.00 46.00 3.83 1.54 0.00 46.50 3.83 1.54 0.00 47.00 3.83 1.54 0.00 47.50 3.83 1.54 0.00 48.00 3.83 1.54 0.00 Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 13HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Pond 4P: Inflow Area = 4.294 ac, 28.20% Impervious, Inflow Depth = 1.98" for 10yr-24hr event Inflow = 10.61 cfs @ 12.08 hrs, Volume= 0.708 af Outflow = 1.31 cfs @ 12.70 hrs, Volume= 0.708 af, Atten= 88%, Lag= 37.1 min Primary = 1.31 cfs @ 12.70 hrs, Volume= 0.708 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Peak Elev= 847.06' @ 12.70 hrs Surf.Area= 0.378 ac Storage= 0.286 af Plug-Flow detention time= 82.8 min calculated for 0.708 af (100% of inflow) Center-of-Mass det. time= 82.8 min ( 919.9 - 837.2 ) Volume Invert Avail.Storage Storage Description #1 844.89' 2.364 af Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 844.89 0.000 0.000 0.000 845.00 0.001 0.000 0.000 846.00 0.085 0.043 0.043 847.00 0.358 0.221 0.265 848.00 0.694 0.526 0.791 849.00 0.786 0.740 1.531 850.00 0.881 0.834 2.364 Device Routing Invert Outlet Devices #1 Primary 844.89'6.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=1.31 cfs @ 12.70 hrs HW=847.06' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.31 cfs @ 6.67 fps) Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 14HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Pond 4P: Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=4.294 ac Peak Elev=847.06' Storage=0.286 af 10.61 cfs 1.31 cfs Type II 24-hr 10yr-24hr Rainfall=3.83"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 15HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Pond 4P: Time (hours) Inflow (cfs) Storage (acre-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0.000 844.89 0.00 1.00 0.00 0.000 844.89 0.00 2.00 0.00 0.000 844.89 0.00 3.00 0.00 0.000 844.89 0.00 4.00 0.00 0.000 844.89 0.00 5.00 0.00 0.000 844.89 0.00 6.00 0.00 0.000 844.89 0.00 7.00 0.00 0.000 844.89 0.00 8.00 0.00 0.000 844.89 0.00 9.00 0.03 0.000 844.98 0.03 10.00 0.09 0.000 845.05 0.08 11.00 0.26 0.002 845.19 0.22 12.00 8.31 0.079 846.29 1.01 13.00 0.94 0.281 847.04 1.30 14.00 0.54 0.233 846.91 1.26 15.00 0.42 0.170 846.70 1.18 16.00 0.33 0.108 846.44 1.08 17.00 0.28 0.049 846.07 0.91 18.00 0.25 0.010 845.47 0.54 19.00 0.22 0.002 845.19 0.23 20.00 0.19 0.001 845.16 0.19 21.00 0.17 0.001 845.14 0.17 22.00 0.17 0.001 845.14 0.17 23.00 0.16 0.001 845.13 0.16 24.00 0.15 0.001 845.13 0.15 25.00 0.00 0.000 844.89 0.00 26.00 0.00 0.000 844.89 0.00 27.00 0.00 0.000 844.89 0.00 28.00 0.00 0.000 844.89 0.00 29.00 0.00 0.000 844.89 0.00 30.00 0.00 0.000 844.89 0.00 31.00 0.00 0.000 844.89 0.00 32.00 0.00 0.000 844.89 0.00 33.00 0.00 0.000 844.89 0.00 34.00 0.00 0.000 844.89 0.00 35.00 0.00 0.000 844.89 0.00 36.00 0.00 0.000 844.89 0.00 37.00 0.00 0.000 844.89 0.00 38.00 0.00 0.000 844.89 0.00 39.00 0.00 0.000 844.89 0.00 40.00 0.00 0.000 844.89 0.00 41.00 0.00 0.000 844.89 0.00 42.00 0.00 0.000 844.89 0.00 43.00 0.00 0.000 844.89 0.00 44.00 0.00 0.000 844.89 0.00 45.00 0.00 0.000 844.89 0.00 46.00 0.00 0.000 844.89 0.00 47.00 0.00 0.000 844.89 0.00 48.00 0.00 0.000 844.89 0.00 Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 16HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Proposed Conditions Runoff = 22.84 cfs @ 12.08 hrs, Volume= 1.541 af, Depth= 4.31" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr-24hr Rainfall=6.46" Area (ac) CN Description 1.211 98 Paved parking, HSG B 3.083 74 >75% Grass cover, Good, HSG C 4.294 81 Weighted Average 3.083 71.80% Pervious Area 1.211 28.20% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 100 0.0110 0.12 Sheet Flow, Grass: Short n= 0.150 P2= 2.66" 2.6 265 0.0110 1.69 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 16.2 365 Total Subcatchment 1S: Proposed Conditions Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)25 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 100yr-24hr Rainfall=6.46" Runoff Area=4.294 ac Runoff Volume=1.541 af Runoff Depth=4.31" Flow Length=365' Slope=0.0110 '/' Tc=16.2 min CN=81 22.84 cfs Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 17HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 1S: Proposed Conditions Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.14 0.00 0.00 2.50 0.18 0.00 0.00 3.00 0.22 0.00 0.00 3.50 0.27 0.00 0.00 4.00 0.31 0.00 0.00 4.50 0.36 0.00 0.00 5.00 0.41 0.00 0.00 5.50 0.46 0.00 0.00 6.00 0.52 0.00 0.01 6.50 0.58 0.00 0.03 7.00 0.64 0.01 0.06 7.50 0.71 0.02 0.09 8.00 0.78 0.04 0.12 8.50 0.85 0.05 0.16 9.00 0.95 0.08 0.24 9.50 1.05 0.12 0.30 10.00 1.17 0.16 0.39 10.50 1.32 0.23 0.56 11.00 1.52 0.32 0.85 11.50 1.83 0.50 1.51 12.00 4.28 2.36 18.58 12.50 4.75 2.76 4.19 13.00 4.99 2.97 1.84 13.50 5.16 3.13 1.34 14.00 5.30 3.25 1.05 14.50 5.41 3.35 0.88 15.00 5.51 3.44 0.80 15.50 5.60 3.53 0.71 16.00 5.68 3.60 0.63 16.50 5.76 3.66 0.57 17.00 5.83 3.72 0.54 17.50 5.89 3.78 0.50 18.00 5.95 3.84 0.47 18.50 6.01 3.89 0.44 19.00 6.06 3.94 0.41 19.50 6.11 3.98 0.38 20.00 6.15 4.02 0.35 20.50 6.19 4.06 0.33 21.00 6.23 4.10 0.32 21.50 6.27 4.13 0.32 22.00 6.31 4.17 0.31 22.50 6.35 4.20 0.30 23.00 6.39 4.24 0.30 23.50 6.42 4.27 0.29 24.00 6.46 4.31 0.29 24.50 6.46 4.31 0.01 25.00 6.46 4.31 0.00 25.50 6.46 4.31 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 6.46 4.31 0.00 26.50 6.46 4.31 0.00 27.00 6.46 4.31 0.00 27.50 6.46 4.31 0.00 28.00 6.46 4.31 0.00 28.50 6.46 4.31 0.00 29.00 6.46 4.31 0.00 29.50 6.46 4.31 0.00 30.00 6.46 4.31 0.00 30.50 6.46 4.31 0.00 31.00 6.46 4.31 0.00 31.50 6.46 4.31 0.00 32.00 6.46 4.31 0.00 32.50 6.46 4.31 0.00 33.00 6.46 4.31 0.00 33.50 6.46 4.31 0.00 34.00 6.46 4.31 0.00 34.50 6.46 4.31 0.00 35.00 6.46 4.31 0.00 35.50 6.46 4.31 0.00 36.00 6.46 4.31 0.00 36.50 6.46 4.31 0.00 37.00 6.46 4.31 0.00 37.50 6.46 4.31 0.00 38.00 6.46 4.31 0.00 38.50 6.46 4.31 0.00 39.00 6.46 4.31 0.00 39.50 6.46 4.31 0.00 40.00 6.46 4.31 0.00 40.50 6.46 4.31 0.00 41.00 6.46 4.31 0.00 41.50 6.46 4.31 0.00 42.00 6.46 4.31 0.00 42.50 6.46 4.31 0.00 43.00 6.46 4.31 0.00 43.50 6.46 4.31 0.00 44.00 6.46 4.31 0.00 44.50 6.46 4.31 0.00 45.00 6.46 4.31 0.00 45.50 6.46 4.31 0.00 46.00 6.46 4.31 0.00 46.50 6.46 4.31 0.00 47.00 6.46 4.31 0.00 47.50 6.46 4.31 0.00 48.00 6.46 4.31 0.00 Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 18HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: Off-Site Runoff = 7.45 cfs @ 11.96 hrs, Volume= 0.339 af, Depth= 3.68" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr-24hr Rainfall=6.46" Area (ac) CN Description 0.048 98 Paved parking, HSG B 1.057 74 >75% Grass cover, Good, HSG C 1.105 75 Weighted Average 1.057 95.66% Pervious Area 0.048 4.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 6S: Off-Site Runoff Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)8 7 6 5 4 3 2 1 0 Type II 24-hr 100yr-24hr Rainfall=6.46" Runoff Area=1.105 ac Runoff Volume=0.339 af Runoff Depth=3.68" Tc=5.0 min CN=75 7.45 cfs Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 19HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 6S: Off-Site Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.07 0.00 0.00 1.50 0.10 0.00 0.00 2.00 0.14 0.00 0.00 2.50 0.18 0.00 0.00 3.00 0.22 0.00 0.00 3.50 0.27 0.00 0.00 4.00 0.31 0.00 0.00 4.50 0.36 0.00 0.00 5.00 0.41 0.00 0.00 5.50 0.46 0.00 0.00 6.00 0.52 0.00 0.00 6.50 0.58 0.00 0.00 7.00 0.64 0.00 0.00 7.50 0.71 0.00 0.00 8.00 0.78 0.00 0.01 8.50 0.85 0.01 0.02 9.00 0.95 0.02 0.03 9.50 1.05 0.04 0.04 10.00 1.17 0.07 0.07 10.50 1.32 0.11 0.11 11.00 1.52 0.17 0.18 11.50 1.83 0.30 0.35 12.00 4.28 1.88 6.37 12.50 4.75 2.25 0.60 13.00 4.99 2.44 0.38 13.50 5.16 2.58 0.29 14.00 5.30 2.69 0.23 14.50 5.41 2.79 0.20 15.00 5.51 2.87 0.18 15.50 5.60 2.95 0.16 16.00 5.68 3.02 0.14 16.50 5.76 3.08 0.13 17.00 5.83 3.13 0.13 17.50 5.89 3.19 0.12 18.00 5.95 3.24 0.11 18.50 6.01 3.29 0.10 19.00 6.06 3.33 0.10 19.50 6.11 3.37 0.09 20.00 6.15 3.41 0.08 20.50 6.19 3.45 0.08 21.00 6.23 3.48 0.08 21.50 6.27 3.52 0.08 22.00 6.31 3.55 0.07 22.50 6.35 3.58 0.07 23.00 6.39 3.61 0.07 23.50 6.42 3.65 0.07 24.00 6.46 3.68 0.07 24.50 6.46 3.68 0.00 25.00 6.46 3.68 0.00 25.50 6.46 3.68 0.00 Time (hours) Precip. (inches) Excess (inches) Runoff (cfs) 26.00 6.46 3.68 0.00 26.50 6.46 3.68 0.00 27.00 6.46 3.68 0.00 27.50 6.46 3.68 0.00 28.00 6.46 3.68 0.00 28.50 6.46 3.68 0.00 29.00 6.46 3.68 0.00 29.50 6.46 3.68 0.00 30.00 6.46 3.68 0.00 30.50 6.46 3.68 0.00 31.00 6.46 3.68 0.00 31.50 6.46 3.68 0.00 32.00 6.46 3.68 0.00 32.50 6.46 3.68 0.00 33.00 6.46 3.68 0.00 33.50 6.46 3.68 0.00 34.00 6.46 3.68 0.00 34.50 6.46 3.68 0.00 35.00 6.46 3.68 0.00 35.50 6.46 3.68 0.00 36.00 6.46 3.68 0.00 36.50 6.46 3.68 0.00 37.00 6.46 3.68 0.00 37.50 6.46 3.68 0.00 38.00 6.46 3.68 0.00 38.50 6.46 3.68 0.00 39.00 6.46 3.68 0.00 39.50 6.46 3.68 0.00 40.00 6.46 3.68 0.00 40.50 6.46 3.68 0.00 41.00 6.46 3.68 0.00 41.50 6.46 3.68 0.00 42.00 6.46 3.68 0.00 42.50 6.46 3.68 0.00 43.00 6.46 3.68 0.00 43.50 6.46 3.68 0.00 44.00 6.46 3.68 0.00 44.50 6.46 3.68 0.00 45.00 6.46 3.68 0.00 45.50 6.46 3.68 0.00 46.00 6.46 3.68 0.00 46.50 6.46 3.68 0.00 47.00 6.46 3.68 0.00 47.50 6.46 3.68 0.00 48.00 6.46 3.68 0.00 Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 20HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Summary for Pond 4P: Inflow Area = 4.294 ac, 28.20% Impervious, Inflow Depth = 4.31" for 100yr-24hr event Inflow = 22.84 cfs @ 12.08 hrs, Volume= 1.541 af Outflow = 1.58 cfs @ 13.20 hrs, Volume= 1.541 af, Atten= 93%, Lag= 67.3 min Primary = 1.58 cfs @ 13.20 hrs, Volume= 1.541 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Peak Elev= 847.94' @ 13.20 hrs Surf.Area= 0.675 ac Storage= 0.752 af Plug-Flow detention time= 203.4 min calculated for 1.540 af (100% of inflow) Center-of-Mass det. time= 203.3 min ( 1,018.3 - 815.0 ) Volume Invert Avail.Storage Storage Description #1 844.89' 2.364 af Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 844.89 0.000 0.000 0.000 845.00 0.001 0.000 0.000 846.00 0.085 0.043 0.043 847.00 0.358 0.221 0.265 848.00 0.694 0.526 0.791 849.00 0.786 0.740 1.531 850.00 0.881 0.834 2.364 Device Routing Invert Outlet Devices #1 Primary 844.89'6.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=1.58 cfs @ 13.20 hrs HW=847.94' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.58 cfs @ 8.06 fps) Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 21HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Pond 4P: Inflow Primary Hydrograph Time (hours) 484644424038363432302826242220181614121086420Flow (cfs)24 22 20 18 16 14 12 10 8 6 4 2 0 Inflow Area=4.294 ac Peak Elev=847.94' Storage=0.752 af 22.84 cfs 1.58 cfs Type II 24-hr 100yr-24hr Rainfall=6.46"Proposed Conditions (6-inch Orifice) Printed 4/28/2020Prepared by Schneider Geomatics Page 22HydroCAD® 10.00-21 s/n 09456 © 2018 HydroCAD Software Solutions LLC Hydrograph for Pond 4P: Time (hours) Inflow (cfs) Storage (acre-feet) Elevation (feet) Primary (cfs) 0.00 0.00 0.000 844.89 0.00 1.00 0.00 0.000 844.89 0.00 2.00 0.00 0.000 844.89 0.00 3.00 0.00 0.000 844.89 0.00 4.00 0.00 0.000 844.89 0.00 5.00 0.00 0.000 844.89 0.00 6.00 0.01 0.000 844.94 0.01 7.00 0.06 0.000 845.03 0.06 8.00 0.12 0.000 845.09 0.11 9.00 0.24 0.002 845.18 0.21 10.00 0.39 0.004 845.28 0.34 11.00 0.85 0.013 845.55 0.60 12.00 18.58 0.234 846.91 1.26 13.00 1.84 0.750 847.94 1.58 14.00 1.05 0.733 847.91 1.57 15.00 0.80 0.677 847.83 1.55 16.00 0.63 0.609 847.72 1.52 17.00 0.54 0.533 847.59 1.48 18.00 0.47 0.454 847.44 1.43 19.00 0.41 0.374 847.27 1.38 20.00 0.35 0.294 847.08 1.32 21.00 0.32 0.216 846.86 1.24 22.00 0.31 0.143 846.60 1.14 23.00 0.30 0.079 846.29 1.01 24.00 0.29 0.028 845.81 0.77 25.00 0.00 0.000 844.89 0.00 26.00 0.00 0.000 844.89 0.00 27.00 0.00 0.000 844.89 0.00 28.00 0.00 0.000 844.89 0.00 29.00 0.00 0.000 844.89 0.00 30.00 0.00 0.000 844.89 0.00 31.00 0.00 0.000 844.89 0.00 32.00 0.00 0.000 844.89 0.00 33.00 0.00 0.000 844.89 0.00 34.00 0.00 0.000 844.89 0.00 35.00 0.00 0.000 844.89 0.00 36.00 0.00 0.000 844.89 0.00 37.00 0.00 0.000 844.89 0.00 38.00 0.00 0.000 844.89 0.00 39.00 0.00 0.000 844.89 0.00 40.00 0.00 0.000 844.89 0.00 41.00 0.00 0.000 844.89 0.00 42.00 0.00 0.000 844.89 0.00 43.00 0.00 0.000 844.89 0.00 44.00 0.00 0.000 844.89 0.00 45.00 0.00 0.000 844.89 0.00 46.00 0.00 0.000 844.89 0.00 47.00 0.00 0.000 844.89 0.00 48.00 0.00 0.000 844.89 0.00 Stage-Storage Computations the Schneider Corporation By AKM Project Name: Carey Grove Park Rehablitation Date 3/2/2020 Location: Carmel, Hamilton County, IN Checked RRH Description: Proposed Pond Stage-Storage Calculations Date 3/2/2020 Vi = Incremental volume (acre-ft) h = Elevation difference (ft) A = Surface area (acres) h = Elevation2 - Elevation1 Average Area = (A1 + A2 + (A1A2)0.5)/3 Conic Volume: Vi = h[(A1 + A2 + (A1A2)0.5)/3] Elevation Area Average Area h Vi Total Volume (ft) (acres) (acres) (ft) (acre-ft) (acre-ft) 844.89 0.000 0.00 0.00 0.11 0.00 845.00 0.001 0.00 0.03 1.00 0.03 846.00 0.085 0.03 0.21 1.00 0.21 847.00 0.358 0.24 0.52 1.00 0.52 848.00 0.694 0.75 0.74 1.00 0.74 849.00 0.786 1.49 0.83 1.00 0.83 850.00 0.881 2.33 POND Stage-Storage Worksheet Orifice Flow Computations The Schneider Corporation By AKM Project Name Carey Grove Park Rehabiltion Date 3/2/2020 Location Carmel, Hamilton County, IN Checked RRH Description Orifice Calculaions Date 3/2/2020 Cd =0.60 D = 0.30 ft A = 0.07 ft2 Invert Elevation = 844.89 ft Orifice Center = 845.04 ft 32.2 Elevation h Q (ft) (ft) (cfs) 845.19 0.15 0.13 846.00 0.96 0.33 847.00 1.96 0.48 848.00 2.96 0.59 849.00 3.96 0.68 850.00 4.96 0.76 Cd = Coefficient of orifice flow A = p(D/2)2 D = Orifice diameter (ft) A = Flow area (ft2)Orifice Center = Invert Elevation + (D/2) h = Head (ft) Q = Flow rate (cfs) h = Elevation - Orifice Center g = 32.2 ft/s2 Q = CdA(2gh)0.5 Cd source: ORIFICE Orifice Flow Worksheet By: AKM Project Name: Date: 3/2/2020 Location: Checked: RRH Description: East Infiltration Trench Sizing Calculations Date: 3/2/2020 AT = Total Runoff Area (acres)Hmin = Minimum Trench Depth (ft) AI = Impervious Area (acres)Hmax = Maximum Trench Depth (ft) I = Percent Impervious Area E = Soil Infiltration Rate (ft/hr) RV = Volumetric Runoff Coefficient ρ = Porosity of Soil WQv = Required Water Quality Volume (acre-ft) tmin = Minimum Drain Time (hrs) P = 1 inch of Rainfall tmax = Maximum Drain Time (hrs) e = Void Ratio of Backfill Material (0.40) Amin = Minimum Bottom of Trench Area (ft 2) AT =1.276 acres E = 0.025 ft/hr AI =0.645 acres tmin = 6 hrs tmax = 72 hrs I =(AI / AT)*100 ρ =0.35 = 50.55 % Hmin = E*tmin / ρ = 0.43 ft Rv = 0.05 + 0.009*(I) = 0.50 Hmax = E*tmax / ρ = 5.14 ft WQv =(P)*(Rv)*(AT) / 12 = 0.054 acre-feet Amin = WQv / [E*t max] = 1299 ft2 WQv / e 5847.02 ft3 2 ft 3094 ft (L*W*H*e) / 43560 0.057 acre-ft Proposed Trench Bottom Area (A) = Proposed Water Quality Volume = = Schneider Geomatics Carey Grove Park Minimum Volume of Backfill Required = Minimum Volume of Backfill Required = Proposed Trench Depth (H) = By: AKM Project Name: Date: 3/2/2020 Location: Checked: RRH Description: East Infiltration Trench Sizing Calculations Date: 3/2/2020 AT = Total Runoff Area (acres)Hmin = Minimum Trench Depth (ft) AI = Impervious Area (acres)Hmax = Maximum Trench Depth (ft) I = Percent Impervious Area E = Soil Infiltration Rate (ft/hr) RV = Volumetric Runoff Coefficient ρ = Porosity of Soil WQv = Required Water Quality Volume (acre-ft) tmin = Minimum Drain Time (hrs) P = 1 inch of Rainfall tmax = Maximum Drain Time (hrs) e = Void Ratio of Backfill Material (0.40) Amin = Minimum Bottom of Trench Area (ft 2) AT =2.939 acres E = 0.025 ft/hr AI =0.569 acres tmin = 6 hrs tmax = 72 hrs I =(AI / AT)*100 ρ =0.35 = 19.36 % Hmin = E*tmin / ρ = 0.43 ft Rv = 0.05 + 0.009*(I) = 0.22 Hmax = E*tmax / ρ = 5.14 ft WQv =(P)*(Rv)*(AT) / 12 = 0.055 acre-feet Amin = WQv / [E*t max] = 1329 ft2 WQv / e 5980.88 ft3 2.25 ft 3350 ft (L*W*H*e) / 43560 0.069 acre-ft Proposed Trench Bottom Area (A) = Proposed Water Quality Volume = = Schneider Geomatics Carey Grove Park Carmel, Hamilton County, IN Minimum Volume of Backfill Required = Minimum Volume of Backfill Required = Proposed Trench Depth (H) = A = Square Foot Open = 1.50 ft2 = 0.75 ft2 (50% clogged) P = Weir Perimeter = 7.90 ft = 3.95 ft (50% clogged) A = Square Foot Open = 0.00 ft2 = 0.00 ft2 (50% clogged) P = Weir Perimeter = 0.00 ft = 0.00 ft (50% clogged) A = Square Foot Open = 0.00 ft2 = 1.00 ft2 (50% clogged) P = Weir Perimeter = 0.00 ft = 3.00 ft (50% clogged) A = Square Foot Open = 0.00 ft2 = 1.00 ft2 (50% clogged) P = Weir Perimeter = 0.00 ft = 3.00 ft (50% clogged) Reference: East Jordan Iron Works Q = 3.0P(d)3/2 Weir Condition (d<0.3') Q = 4.89A(d)1/2 Orifice Condition (d>0.4') Reference: HERPICC Stormwater Drainage Manual-Revised July 1994 (Equations 5.3.2 & 5.3.3) (control depth is based on d(weir) if d(weir)<0.4, if d(weir)>0.4 then d(orifice)) Structure # Type Q Depth (d weir) Depth (d orifice) Max Depth (cfs)(ft)(ft)(ft) 603 Neenah R-3405 0.02 0.01 0.00 0.01 604 Neenah R-3405 0.06 0.03 0.00 0.03 NOTE: All Inlets have been sized for 100-year event with a minimum 6" of freeboard in lieu of meeting the full freeboard requirements as outlined in Table 4-4 of the Stormwater Technical Standards. Inlet Capacity Calculations 100-Year Rational Storm Event Carey Grove Park 4/27/2020 Neenah R-3405