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Home My WebLink AboutDrainage Report 11-18-19STORMWATER TECHNICAL REPORT For: WATERFRONT OF WEST CLAY SECTION 5B 4455 W. 121st Street Carmel, Indiana Project #W16-0409-5B Storm Infrastructure Calculations Prepared For: Waterfront Homes 11731 Cold Creek Road Zionsville, IN 46077 317-714-2406 Prepared By: Brittany C. Hansen Checked By: Travis P. Gaither, P.E. Certified By: Duane A. Sharrer, P.E. Date: 18 November 2019 10505 North College Avenue | Indianapolis, IN 46280 | .www.weihe.net | (317) 846-6611 | (800) 452-6408 | Fax: (317) 843-0546 Allan H. Weihe, P.E., L.S., - Founder November 20, 2019 Stormwater Technical Report Prepared For: Waterfront of West Clay Section 5B Carmel, IN Project #W16-0409-5B TABLE OF CONTENTS 1.Project Narrative a.Overall Project Narrative b.Existing Conditions c.Proposed Conditions d.Location Maps 2.Pipe Sizing Calculations a.Existing Conditions Map b.Storm Inlet Basin Map c.Supporting Calculations d.Hydraflow Calculations e.Gutter Spread/Inlet Capacity f.Flood Routing Calculations 3.Appendix a.Section 5A Report – July 25, 2018 PROJECT NARRATIVE Waterfront of West Clay Section 5B– Carmel, IN Weihe Engineers, Inc. 11/18/2019 Stormwater Technical Report Prepared For: Waterfront of West Clay Section 5B Carmel, IN Project #W16-0409-5B Project Narrative: Waterfront Homes is proposing to develop Section 5B in the “Waterfront of West Clay” subdivision on approximately 19+ acres of land in Carmel, Indiana. Section 5B will develop 27 single family residential lots. The overall development is located between 116th Street and 121st Street, approximately 0.6 miles east of US 421 (Michigan Road). Section 5B is north of Section 5A in the overall development. The proposed development is on a site at a Latitude of N 39° 57' 42" and Longitude W 86° 13' 58", falling within Carmel, Indiana. The site is generally located in the Southwest Quarter of Section 31, Township 18 North, Range 3 East, Clay Township, Hamilton County, Indiana. Please refer to Figure 1.1. Floodzone: Based upon a scaled interpretation of the Flood Insurance Map No.18057C0205G for Hamilton County, Indiana, dated November 19, 2017 Section 5B IS NOT located within a Special Flood Hazard Area. See Figure 1.2. Overall Stormwater Design: The Schneider Corporation prepared a master drainage report dated February 10, 2004 for this development, which was then called “The Lakes at Hamilton Place”. Paul I. Cripe, Inc. then revised the master drainage calculations on July 31, 2006 and the name of the development was changed to “Sanctuary at 116th Street”. CESO has also submitted revised master drainage calculations for review with the most current drainage report dated May 10, 2016 for Section 2B. The current master plan detention is provided by two large existing ponds, the East Pond and the West Pond. The two existing ponds will provide all the necessary detention for the overall site and are interconnected. The entire subject tract is part of the Long Branch Creek Watershed. Waterfront of West Clay Section 5B– Carmel, IN Weihe Engineers, Inc. 11/18/2019 Existing Conditions: Currently the subject tract is covered with grass and some sporadic trees. The subject tract is adjoined by 121st Street to the north, existing Waterfront of West Clay Sections to the west, the existing East Pond and Waterfront of West Clay Section 5A to the south, and Long Branch Estates common area to the east. Refer to Figure 1.3. The subject tract consists of the following soil types: Brookston, Miami and Crosby. A soil map has been included with this report. Waterfront of West Clay Section 5B– Carmel, IN Weihe Engineers, Inc. 11/18/2019 Proposed Conditions: The proposed Section 5B lies within the master planned drainage basin for the East Pond and the Direct East drainage basin. Section 5B does not require much infrastructure to be built to service the proposed lots. A stub of approximately 150’ of Stone Lake Drive has been designed in the Section 5A plans. This street will be extended through section 5B, wrapping back onto itself in a loop. The proposed improvements in Section 5B adhere to the revised master planned drainage basin of the East Pond from the Section 5A drainage report. Storm Sewers: The proposed Section 5B storm sewer design has changed somewhat from the original master plan. The locations of curb inlets on Stone Lake Drive have slightly changed but still outlet to the East Pond. This change does not change the master detention basin for the East Pond. The changes to the master storm layout will also not adversely impact any existing storm sewer infrastructure. The frontage of lots 182-184 and 159-163 drain to storm inlets on Stone Lake Drive that were constructed with Section 5A. The frontage of lots 164-181 and lot 185 drain to new storm inlets on Stone Lake Drive. A small area in the side yards of lots 176 and 175 will drain into a beehive inlet that is part of the system draining into the East Pond. The rear of lots 159-164 drain into beehive inlets that were constructed with Section 2C. The rear of lots 165 and 166 drain into a new beehive inlet. All storm sewer systems within section 5B drain or will drain into the East Pond. The rear of lots 176-184 will drain directly into the East Pond. The rear of lots 167-175 and lot 185 drain offsite to the Direct East. The storm sewer system is designed to convey stormwater at a minimum velocity of 2.5 feet/second through reinforced concrete pipes. In accordance with the HERPIC manual, the 10 year design flow does not exceed the capacity of the proposed pipes. Refer to Section 3 for the pipe and inlet sizing calculations and Figure 3.2 for the Pipe Sizing Basin Map. Water Quality: Water quality for Section 5B of Waterfront of West Clay was provided and accounted for in the master plan for the development. LOCATION MAP Date: November 14, 2019FIGURE 1.1 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S PROJECT LOCATION WATERFRONT OF WEST CLAY SECTION 5B CARMEL, IN FEMA MAP Date: November 14, 2019FIGURE 1.2 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S PROJECT LOCATION WATERFRONT OF WEST CLAY SECTION 5B CARMEL, IN AERIAL MAP Date: November 14, 2019FIGURE 1.3 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S PROJECT LOCATION WATERFRONT OF WEST CLAY SECTION 5B CARMEL, IN 6 Custom Soil Resource Report Soil Map (Waterfront Sec 5B)4423570442363044236904423750442381044238704423570442363044236904423750442381044238704423930565210 565270 565330 565390 565450 565510 565570 565630 565690 565750 565210 565270 565330 565390 565450 565510 565570 565630 565690 565750 39° 57' 46'' N 86° 14' 12'' W39° 57' 46'' N86° 13' 47'' W39° 57' 34'' N 86° 14' 12'' W39° 57' 34'' N 86° 13' 47'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84 0 100 200 400 600 Feet 0 35 70 140 210 Meters Map Scale: 1:2,620 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. Custom Soil Resource Report 7 Map Unit Legend (Waterfront Sec 5B) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI Br Brookston silty clay loam, 0 to 2 percent slopes 4.3 12.0% CrA Crosby silt loam, fine-loamy subsoil, 0 to 2 percent slopes 8.2 23.0% MmC2 Miami silt loam, 6 to 12 percent slopes, eroded 4.1 11.4% MoC3 Miami clay loam, 6 to 12 percent slopes, severely eroded 1.1 3.2% Sh Shoals silt loam, 0 to 2 percent slopes, frequently flooded, brief duration 0.1 0.4% W Water 4.1 11.4% YbvA Brookston silty clay loam-Urban land complex, 0 to 2 percent slopes 1.9 5.4% YclA Crosby silt loam, fine-loamy subsoil-Urban land complex, 0 to 2 percent slopes 8.0 22.5% YmsC2 Miami silt loam-Urban land complex, 6 to 12 percent slopes, eroded 3.8 10.7% Totals for Area of Interest 35.7 100.0% Map Unit Descriptions (Waterfront Sec 5B) The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a Custom Soil Resource Report 8 PIPE SIZING CALCULATIONS STONE LAKEDRIVEWWWWWWWWWWW666564636261595857565554WWPRAIRIE FALCONDRIVENP = 898.832 YR = 899.05EXISTING PONDTOP OF BANK = 900.1SPILLWAY=899.7***10 YR = 899.25100 YR = 899.6052536768697172156157158**EXISTING PONDNP = 898.83100 YR = 899.602YR =899.0510YR = 899.25TOP OF BANK = 900.1SPILLWAY = 899.7FIGURE 3.1 EXISTING CONDITIONS EXHIBIT Date: November 14, 2019 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S WATERFRONT OF WEST CLAY SECTION 5B CARMEL, IN NP = 898.832 YR = 899.05EXISTING PONDTOP OF BANK = 900.1SPILLWAY=899.710 YR = 899.25100 YR = 899.60STONE LAKEDRIVEWWWWWWWWWWW6665646362615857565554WWPRAIRIE FALCONDRIVENP = 898.832 YR = 899.05EXISTING PONDTOP OF BANK = 900.1SPILLWAY=899.7***10 YR = 899.25100 YR = 899.605253676869707172156157158**BLOCK "B"271.77 AC.300.44 AC.310.37 AC.15916016116216316416516616717918018117817717617518218318416816917017117217317418530072.84 AC.30031.17 AC.30040.47 AC.30050.89 AC.30061.51 AC.30080.07 AC.390.88 AC.400.67 AC.410.51 AC.330.52 AC.33A0.57 AC.350.36 AC.360.87 AC.30020.61 AC.EXISTING PONDNP = 898.83100 YR = 899.602YR =899.0510YR = 899.25TOP OF BANK = 900.1SPILLWAY = 899.730100.83 AC.30110.51 AC.380.04 AC.FIGURE 3.2 STORM INLET BASIN MAP Date: November 14, 2019 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S WATERFRONT OF WEST CLAY SECTION 5B CARMEL, IN Project: Date: Job No.: Checked By: Prepared By: Typical Driveway (Ld, Wd)29 16 Street Width, B-B (Wst)30 Sidewalk Width (Wsw)5 Walking Path Width (Wwp)8 Str. # Total Pad Number Street Sidewalk Walking Total Impervious Total Pervious Composite Drainage Area, of Length Length Path Length Area Area "c" Value Area, At Apad Driveways Lst Lsw Lwp Aimp Aper (acre) (sq. ft.) (ft) (ft) (ft) (acre) (acre) Cw 39 0.88 6336 0 0 0 0 0.15 0.73 0.31 40 0.67 10911 4 364 376 0 0.46 0.21 0.65 41 0.51 10670 3 364 340 0 0.44 0.07 0.76 33 0.52 0 6 419 460 0 0.26 0.25 0.53 33A 0.57 0 0 419 0 0 0.14 0.43 0.36 35 0.36 0 0 424 0 0 0.15 0.21 0.46 36 0.87 9463 6 424 475 0 0.48 0.39 0.56 38 0.04 777 0.25 0 0 0 0.02 0.01 0.58 TPG BCH Composite "c" Value Calculations Waterfront Sec 5B 11/18/2019 W16-0409 Shallow Conc Flow Travel Time:Channel Flow Travel Time:Short Grass 0.15 Grass 0.03Dense Grass 0.24 Concrete 0.015Shallow Conc Flow (Unpaved):Pavement 0.011 Rip‐Rap 0.035Shallow Conc Flow (Paved):2 Yr, 24 Hr Rainfall= 2.66Overland Flow Travel Time:Tc minimum= 5Paved Gutter & Channel FlowTcBasin Len S n T_t Len S n T_t Len S Pave/Un Vel T_t Len A Pw r S n Vel T_t(ft)%(min)(ft)%(min)(ft)%P or U(ft/s)(min)(ft)(sf)(ft)(ft)%(ft/s)(min)(min)39 100 1.50 0.24 18 0 180 1.00 U 1.61 2 0 19.440 71 1.20 0.24 15 0 191 0.90 P 1.93 2 0 16.241 80 1.10 0.24 17 0 182 0.90 P 1.93 2 0 18.233 31 2.4 0.24 6 0 367 0.6 P 1.57 4 0 9.633A 100 1.1 0.24 20 0 106 0.6 P 1.57 1 0 21.035 30 3.20 0.24 5 0 205 0.63 P 1.61 2 0 7.136 80 2.70 0.24 12 0 281 0.63 P 1.61 3 0 14.538 51 1.70 0.24 10 0 0 0.00 P 0.00 0 0 9.7Time of ConcentrationCalculationsPrepared By:Checked By:Job No.:Date:Project: Waterfront Sec 5B11/18/2019W16-0409TPGBCHChannel FlowOverland Flow Channel FlowMannings Values (n)Overland Flow Overland Flow Shallow Conc. Flow Project:Date:Job No.:Checked By:Prepared By:Min. Travel Lane Required = 10 ftStreet Width = 30 ftTotal Flow, % Net Flow, Longitudinal Cross Slope, Manning's Depth at Gutter Spread, Min. Clear TravelQ Flow FlowQnetSlope, S Sx Coefficient, Casting, D GS Lane WidthStr. # (cfs) Direction (%) (cfs) (%) (%) N (ft) (ft)(ft)Left 60 1.15 0.90 2.08 0.013 0.157.03Right 40 0.77 0.60 2.08 0.013 0.146.51Left 35 0.57 0.60 2.08 0.013 0.125.82Right 65 1.06 0.90 2.08 0.013 0.146.81Left 20 0.29 0.60 2.08 0.013 0.094.53Right 80 1.17 0.60 2.08 0.013 0.167.62Left 75 0.61 0.60 2.08 0.013 0.125.96Right 25 0.20 0.60 2.08 0.013 0.083.95Left 25 0.60 0.68 2.08 0.013 0.125.80Right 75 0.63 0.88 2.08 0.013 0.125.63Left 70 0.63 0.88 2.08 0.013 0.125.63Right 30 0.60 0.68 2.08 0.013 0.125.80Gutter Spread CalculationsWaterfront Sec. 5B11/18/2019W16-0409TPGBCH40 1.9212.241 1.6333 1.4612.433A 0.8135 0.9514.436 2.25 Project:Date:Job No.:Checked By:Prepared By:Single DoubleWeir Flow (d<0.3')1.4 2.8Orifice Flow (d>0.4')4.6 9.20.7 1.4Gutter Spread3.45 4.60.1Min. Travel Lane Required = 10 ft2.00Street Width = 30 ftFlow, Depth Depth Street Cross Gutter Spread, Gutter Spread, Clear TravelQ # of Weir, d Orifice, d Slope, Sx GS (weir) GS (orifice) Lane Width Inlet TypeStr. # (cfs) Inlets (ft) (ft) (%) (ft) (ft) (ft)(single/double)40 1.92 2 0.27 0.08 2.08 10.10 0.97DOUBLE INLET41 1.63 2 0.24 0.06 2.08 8.77 0.00DOUBLE INLET33 1.46 1 0.27 0.18 2.08 10.22 5.94SINGLE INLET33A 0.81 1 0.18 0.06 2.08 5.99 0.00SINGLE INLET35 0.95 1 0.20 0.08 2.08 6.98 0.90SINGLE INLET36 2.25 2 0.30 0.11 2.08 11.54 2.39DOUBLE INLETCurb InletCapacity CalculationsWaterfront Sec. 5BW16-0409TPGBCH11/18/2019P, 50% Clogged (ft) =A, 50% Clogged (ft2) =Weir Perimeter, P (ft) =Open Area, A (ft2) =Neenah R‐3501‐TR or TL11.513.811.1Casting Length, Cl (ft) =Casting Depth, Cd (ft) = APPENDIX 10505 North College Avenue | Indianapolis, IN 46280 | .www.weihe.net | (317) 846-6611 | (800) 452-6408 | Fax: (317) 843-0546 Allan H. Weihe, P.E., L.S., - Founder STORMWATER TECHNICAL REPORT For: WATERFRONT OF WEST CLAY SECTION 5A 4455 W. 121st Street Carmel, Indiana Project #W16-0409 Revised Detention and Storm Infrastructure Calculations Prepared For: Waterfront Homes 12080 Abney Run Drive Zionsville, IN 46077 317-714-2406 Prepared By: Travis P. Gaither, P.E. Checked By: Alvin E. Skoog, Jr., P.E. Certified By: Travis P. Gaither, P.E. Date: 19 April 2017 Revised: 7 May 2018 25 July 2018 Stormwater Technical Report Prepared For: Waterfront of West Clay Section 5A Carmel, IN Project #W16-0409 TABLE OF CONTENTS 1. Project Narrative a. Overall Project Narrative b. Existing Conditions c. Proposed Conditions d. Location Maps 2. Revised Detention Calculations a. ICPR Routing Schematic b. ICPR Input Report c. ICPR Results Report d. Emergency Overflow Calculations e. Emergency Overland Spillway Detail 3. Pipe Sizing Calculations a. Existing Conditions Map b. Storm Inlet Basin Map c. Supporting Calculations d. Hydraflow Calculations e. Gutter Spread/Inlet Capacity f. Flood Routing Calculations 4. Appendix a. CESO – Section 2B Report – May 10, 2016 PROJECT NARRATIVE Waterfront of West Clay Section 5A– Carmel, IN Weihe Engineers, Inc. 5/7/2018 Stormwater Technical Report Prepared For: Waterfront of West Clay Section 5A Carmel, IN Project #W16-0409 Project Narrative: Waterfront Homes is proposing to develop Section 5A in the “Waterfront of West Clay” subdivision on approximately 12+ acres of land in Carmel, Indiana. Section 5A will develop 13 single family residential lots. The overall development is located between 116th Street and 121st Street, approximately 0.6 miles east of US 421 (Michigan Road). Section 5A is east of Section 2C in the overall development. The proposed development is on a site at a Latitude of N 39° 57' 37" and Longitude W 86° 14' 01", falling within Carmel, Indiana. The site is generally located in the Southwest Quarter of Section 31, Township 18 North, Range 3 East, Clay Township, Hamilton County, Indiana. Please refer to Figure 1.1. Floodzone: Based upon a scaled interpretation of the Flood Insurance Map No.18057C0205G for Hamilton County, Indiana, dated November 19, 2017 Section 5A IS located within a Special Flood Hazard Area inundated by 100-year flood-Base Flood Elevation or Floodway Area in Zone AE. Zone AE for Long Branch Creek is adjacent to the overall site along the eastern boundary. See Figure 1.2. Overall Stormwater Design: The Schneider Corporation prepared a master drainage report dated February 10, 2004 for this development, which was then called “The Lakes at Hamilton Place”. Paul I. Cripe, Inc. then revised the master drainage calculations on July 31, 2006 and the name of the development was changed to “Sanctuary at 116th Street”. CESO has also submitted revised master drainage calculations for review with the most current drainage report dated May 10, 2016 for Section 2B. The current master plan detention is provided by two large existing ponds, the East Pond and the West Pond. The two existing ponds will provide all the necessary detention for the overall site and are not interconnected. Each pond discharges through their own 12” RCP with both discharge pipe systems eventually draining into Long Branch Creek. The entire subject tract is part of the Long Branch Creek Watershed. Waterfront of West Clay Section 5A– Carmel, IN Weihe Engineers, Inc. 5/7/2018 Existing Conditions: Currently the subject tract is covered with grass and some sporadic trees. The subject tract is adjoined by future Waterfront of West Clay Sections to the north, existing Waterfront of West Clay Sections to the west, the existing West Pond to the south, and Long Branch Estates common area to the east. Refer to Figure 1.3. The subject tract consists of the following soil types: Brookston, Miami and Crosby. A soil map has been included with this report. Waterfront of West Clay Section 5A– Carmel, IN Weihe Engineers, Inc. 5/7/2018 Proposed Conditions: The proposed Section 5A lies entirely within the master planned drainage basin for the East Pond. Section 5A does not require much infrastructure to be built to service the proposed lots. A stub of approximately 175’ of Prairie Falcon Drive has been designed in the Section 2C plans. This street will be extended to the end of the cul-de-sac with Stone Lake Drive providing a stub to the north of approximately 150’. The proposed improvements in Section 5A adheres to the approved master planned drainage basin of the East Pond from previous reports. Revised detention calculations have been included in Section 2 of this report. The CESO Section 2B revised drainage calculations contained two ICPR detention models, one was called “Schneider Original Master Plan Model-Cripe Revised” and the second was called “Schneider Original Master Plan Model-Cripe Revised and Updated”. It was noticed in each calculation that both pond outlets were regulated with a rating curve and operating table. This created inaccurate calculations because the elevations set for the rating curves to turn on were higher than the 100-year elevations for each pond, resulting in no discharge leaving the pond because the rating curve never turned on. Therefore, Weihe Engineers has recreated the ponds in ICPR with the existing outlets to create more accurate release rates and staging elevations for each pond. Please note that the direct discharge basins indicated in the overall master planned design are not included in the revised detention model as Section 5A is not included in these areas and these areas don’t impact the ponds. Pond Normal Pool Elev. Revised Pond Staging Revised Release Rates (cfs) 2-YR 10-YR 100-YR 2-YR 10-YR 100-YR East 898.83 899.05 899.25 899.60 1.93 3.56 4.20 West 898.88 899.16 899.48 899.98 2.66 3.66 4.49 Based on the results, it has been determined that the emergency overland spillway for each pond needs to be raised from the existing spillway elevation. The existing spillway elevation for the East Pond is currently 899.3 and is proposed to be raised to 899.7. The existing spillway elevation for the West Pond is 899.4 and needs to be raised to 900.0. Weihe Engineers propose that the emergency overland spillway for the east pond be relocated from the northeast corner of the pond to the east side of the pond during spillway reconstruction. Revised emergency overflow spillway calculations and a detail can be found in Section 2 of this report. Storm Sewers: The proposed Section 5A storm sewer design has changed somewhat from the original master plan. There is a storm change on Prairie Falcon Drive which now drains to the end of the cul-de-sac. This change will require revisions to the master storm layout, but does not change the master detention basin for the East Pond. The changes to the master storm layout will also not adversely impact any existing storm sewer infrastructure. Waterfront of West Clay Section 5A– Carmel, IN Weihe Engineers, Inc. 5/7/2018 Future storm sewers north of Section 5A (Section 5) still need further design when those lots are designed and developed to convey runoff into the East Pond. The rear of lots 98-109 will drain directly into the East Pond. The rear lot of lot 110 will drain into a proposed inlet to be constructed with Section 2C. The frontage lots 98-109 will drain onto Prairie Falcon Drive, all but lot 98 and part of lot 99 will drain to the east to a new storm inlet at the end of the cul-de-sac. This storm system will discharge into the East Pond. The frontage of Lots 98, 110 and part of lot 99 will drain to the west and tie into the storm system designed in Section 2C. The remaining frontage of Lots 109 and 110 will drain onto Stone Lake Drive and tie into new storm inlets just north of these lots. These inlets will also drain lots to the north in a future section. This storm system will extend the outlet an upstream storm sewer system designed in Section 2C to the East Pond. The storm sewer system is designed to convey stormwater at a minimum velocity of 2.5 feet/second through reinforced concrete pipes. In accordance with the HERPIC manual, the 10 year design flow does not exceed the capacity of the proposed pipes. Refer to Section 3 for the pipe and inlet sizing calculations and Figure 3.2 for the Pipe Sizing Basin Map. Water Quality: Water quality for Section 5A of Waterfront of West Clay was provided and accounted for in the master plan for the development. LOCATION MAP Date: May 7, 2018FIGURE 1.1 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S PROJECT LOCATION WATERFRONT OF WEST CLAY SECTION 5A CARMEL, IN FEMA MAP Date: May 7, 2018FIGURE 1.2 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S PROJECT LOCATION WATERFRONT OF WEST CLAY SECTION 5A CARMEL, IN AERIAL MAP Date: May 7, 2018FIGURE 1.3 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S PROJECT LOCATION WATERFRONT OF WEST CLAY SECTION 5A CARMEL, IN Soil Map—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 8/9/2017 Page 1 of 3442350044235504423600442365044237004423750442350044235504423600442365044237004423750565210565260565310565360565410565460565510565560565610565660 565210 565260 565310 565360 565410 565460 565510 565560 565610 565660 39° 57' 41'' N 86° 14' 11'' W39° 57' 41'' N86° 13' 52'' W39° 57' 31'' N 86° 14' 11'' W39° 57' 31'' N 86° 13' 52'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84 0 100 200 400 600 Feet 0 30 60 120 180 Meters Map Scale: 1:2,130 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 17, Sep 14, 2016 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 27, 2014—Aug 28, 2014 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 8/9/2017 Page 2 of 3 Map Unit Legend Hamilton County, Indiana (IN057) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI CrA Crosby silt loam, fine-loamy subsoil, 0 to 2 percent slopes 4.1 22.4% MmC2 Miami silt loam, 6 to 12 percent slopes, eroded 6.4 34.7% W Water 7.9 42.9% Totals for Area of Interest 18.4 100.0% Soil Map—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 8/9/2017 Page 3 of 3 REVISED DETENTION CALCULATIONS WATERFRONT OF WEST CLAY - W160409 REVISED DETENTION CALCULATIONS ICPR BASIN REPORT A:POND WEST U:POND WEST ,v D:OUT WEST W:EX WEST WEIR ,v T:OUT WEST A:POND EAST U:POND EAST U:OFFSITE E POND "- D:OUT EAST W:EX EAST WEIR ,v T:OUT EAST WATERFRONT OF WEST CLAY - W160409 REVISED DETENTION CALCULATIONS ICPR INPUT REPORT ========================================================================================== ==== Basins ============================================================================== ========================================================================================== Name: OFFSITE E POND Node: POND EAST Status: Offsite Group: BASE Type: SCS Unit Hydrograph CN Unit Hydrograph: Uh484 Peaking Factor: 484.0 Rainfall File:Storm Duration(hrs): 0.00 Rainfall Amount(in): 0.000 Time of Conc(min): 20.00 Area(ac): 3.164 Time Shift(hrs): 0.00 Curve Number: 70.00 Max Allowable Q(cfs): 999999.000 DCIA(%): 0.00 ------------------------------------------------------------------------------------------ ---------- Name: POND EAST Node: POND EAST Status: Onsite Group: BASE Type: SCS Unit Hydrograph CN Unit Hydrograph: Uh484 Peaking Factor: 484.0 Rainfall File:Storm Duration(hrs): 0.00 Rainfall Amount(in): 0.000 Time of Conc(min): 27.00 Area(ac): 61.686 Time Shift(hrs): 0.00 Curve Number: 77.00 Max Allowable Q(cfs): 999999.000 DCIA(%): 0.00 ------------------------------------------------------------------------------------------ ---------- Name: POND WEST Node: POND WEST Status: Onsite Group: BASE Type: SCS Unit Hydrograph CN Unit Hydrograph: Uh484 Peaking Factor: 484.0 Rainfall File:Storm Duration(hrs): 0.00 Rainfall Amount(in): 0.000 Time of Conc(min): 25.00 Area(ac): 52.161 Time Shift(hrs): 0.00 Curve Number: 77.00 Max Allowable Q(cfs): 999999.000 DCIA(%): 0.00 ========================================================================================== ==== Nodes =============================================================================== ========================================================================================== Name: OUT EAST Base Flow(cfs): 0.000 Init Stage(ft): 881.500 Group: BASE Warn Stage(ft): 881.500 Type: Time/Stage Time(hrs) Stage(ft) --------------- --------------- 0.00 881.500 99.00 881.500 ------------------------------------------------------------------------------------------ Name: OUT WEST Base Flow(cfs): 0.000 Init Stage(ft): 874.360 Group: BASE Warn Stage(ft): 874.360 Type: Time/Stage Time(hrs) Stage(ft) --------------- --------------- 0.00 874.360 99.00 874.360 ------------------------------------------------------------------------------------------ Name: POND EAST Base Flow(cfs): 0.000 Init Stage(ft): 898.830 Group: BASE Warn Stage(ft): 899.300 Type: Stage/Area Stage(ft) Area(ac) --------------- --------------- 898.000 16.8440 899.000 17.5280 900.000 18.2260 901.000 18.9240 901.570 19.0000 ------------------------------------------------------------------------------------------ Name: POND WEST Base Flow(cfs): 0.000 Init Stage(ft): 898.880 Group: BASE Warn Stage(ft): 899.400 Type: Stage/Area Stage(ft) Area(ac) --------------- --------------- 898.000 8.8010 899.000 9.2570 900.000 9.7180 901.000 10.1820 901.950 10.2000 ========================================================================================== ==== Drop Structures ===================================================================== ========================================================================================== Name: OUT EAST From Node: POND EAST Length(ft): 430.00 Group: BASE To Node: OUT EAST Count: 1 UPSTREAM DOWNSTREAM Friction Equation: Automatic Geometry: Circular Circular Solution Algorithm: Most Restrictive Span(in): 12.00 12.00 Flow: Both Rise(in): 12.00 12.00 Entrance Loss Coef: 0.500 Invert(ft): 897.660 881.500 Exit Loss Coef: 1.000 Manning's N: 0.013000 0.013000 Outlet Ctrl Spec: Use dc or tw Top Clip(in): 0.000 0.000 Inlet Ctrl Spec: Use dc Bot Clip(in): 0.000 0.000 Solution Incs: 10 Upstream FHWA Inlet Edge Description: Circular Concrete: Square edge w/ headwall Downstream FHWA Inlet Edge Description: Circular Concrete: Square edge w/ headwall *** Weir 1 of 1 for Drop Structure OUT EAST *** TABLE Count: 1 Bottom Clip(in): 0.000 Type: Horizontal Top Clip(in): 0.000 Flow: Both Weir Disc Coef: 3.200 Geometry: Rectangular Orifice Disc Coef: 0.600 Span(in): 18.00 Invert(ft): 898.830 Rise(in): 18.00 Control Elev(ft): 898.830 ------------------------------------------------------------------------------------------ ---------- Name: OUT WEST From Node: POND WEST Length(ft): 134.00 Group: BASE To Node: OUT WEST Count: 1 UPSTREAM DOWNSTREAM Friction Equation: Automatic Geometry: Circular Circular Solution Algorithm: Most Restrictive Span(in): 12.00 12.00 Flow: Both Rise(in): 12.00 12.00 Entrance Loss Coef: 0.500 Invert(ft): 897.860 889.830 Exit Loss Coef: 0.000 Manning's N: 0.013000 0.013000 Outlet Ctrl Spec: Use dc or tw Top Clip(in): 0.000 0.000 Inlet Ctrl Spec: Use dc Bot Clip(in): 0.000 0.000 Solution Incs: 10 Upstream FHWA Inlet Edge Description: Circular Concrete: Square edge w/ headwall Downstream FHWA Inlet Edge Description: Circular Concrete: Square edge w/ headwall *** Weir 1 of 1 for Drop Structure OUT WEST *** TABLE Count: 1 Bottom Clip(in): 0.000 Type: Horizontal Top Clip(in): 0.000 Flow: Both Weir Disc Coef: 3.200 Geometry: Rectangular Orifice Disc Coef: 0.600 Span(in): 18.00 Invert(ft): 898.880 Rise(in): 18.00 Control Elev(ft): 898.880 ========================================================================================== ==== Weirs =============================================================================== ========================================================================================== Name: EX EAST WEIR From Node: POND EAST Group: BASE To Node: OUT EAST Flow: None Count: 1 Type: Vertical: Fread Geometry: Trapezoidal Bottom Width(ft): 18.00 Left Side Slope(h/v): 20.00 Right Side Slope(h/v): 20.00 Invert(ft): 899.300 Control Elevation(ft): 899.300 Struct Opening Dim(ft): 9999.00 TABLE Bottom Clip(ft): 0.000 Top Clip(ft): 0.000 Weir Discharge Coef: 3.200 Orifice Discharge Coef: 0.600 ------------------------------------------------------------------------------------------ ---------- Name: EX WEST WEIR From Node: POND WEST Group: BASE To Node: OUT WEST Flow: None Count: 1 Type: Vertical: Fread Geometry: Trapezoidal Bottom Width(ft): 20.00 Left Side Slope(h/v): 100.00 Right Side Slope(h/v): 100.00 Invert(ft): 899.400 Control Elevation(ft): 899.400 Struct Opening Dim(ft): 9999.00 TABLE Bottom Clip(ft): 0.000 Top Clip(ft): 0.000 Weir Discharge Coef: 3.200 Orifice Discharge Coef: 0.600 ========================================================================================== ==== Hydrology Simulations =============================================================== ========================================================================================== Name: 002YR-24HR Filename: C:\USERS\GAITHERT\DESKTOP\WORK\SANCTUARY\ICPR\002YR-24HR.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Scsii-24 Rainfall Amount(in): 2.93 Time(hrs) Print Inc(min) --------------- --------------- 24.000 5.00 ------------------------------------------------------------------------------------------ ---------- Name: 010YR-24HR Filename: C:\USERS\GAITHERT\DESKTOP\WORK\SANCTUARY\ICPR\010YR-24HR.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Scsii-24 Rainfall Amount(in): 4.19 Time(hrs) Print Inc(min) --------------- --------------- 24.000 5.00 ------------------------------------------------------------------------------------------ ---------- Name: 100YR-24HR Filename: C:\USERS\GAITHERT\DESKTOP\WORK\SANCTUARY\ICPR\100YR-24HR.R32 Override Defaults: Yes Storm Duration(hrs): 24.00 Rainfall File: Scsii-24 Rainfall Amount(in): 5.82 Time(hrs) Print Inc(min) --------------- --------------- 24.000 5.00 ========================================================================================== ==== Routing Simulations ================================================================= ========================================================================================== Name: 002YR-24HR Hydrology Sim: 002YR-24HR Filename: C:\USERS\GAITHERT\DESKTOP\WORK\SANCTUARY\ICPR\002YR-24HR.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 Start Time(hrs): 0.000 End Time(hrs): 30.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 30.000 5.000 Group Run --------------- ----- BASE Yes ------------------------------------------------------------------------------------------ ---------- Name: 010YR-24HR Hydrology Sim: 010YR-24HR Filename: C:\USERS\GAITHERT\DESKTOP\WORK\SANCTUARY\ICPR\010YR-24HR.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 Start Time(hrs): 0.000 End Time(hrs): 30.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 30.000 5.000 Group Run --------------- ----- BASE Yes ------------------------------------------------------------------------------------------ ---------- Name: 100YR-24HR Hydrology Sim: 100YR-24HR Filename: C:\USERS\GAITHERT\DESKTOP\WORK\SANCTUARY\ICPR\100YR-24HR.I32 Execute: Yes Restart: No Patch: No Alternative: No Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500 Time Step Optimizer: 10.000 Start Time(hrs): 0.000 End Time(hrs): 30.00 Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000 Boundary Stages: Boundary Flows: Time(hrs) Print Inc(min) --------------- --------------- 30.000 5.000 Group Run --------------- ----- BASE Yes WATERFRONT OF WEST CLAY - W160409 REVISED DETENTION CALCULATIONS ICPR BASIN REPORT Simulation Basin Group Time Max Flow Max Volume Volume hrs cfs in ft3 -------------------------------------------------------------------------------------- 002YR-24HR OFFSITE E POND BASE 12.13 2.01 0.675 7751 010YR-24HR OFFSITE E POND BASE 12.13 4.72 1.456 16723 100YR-24HR OFFSITE E POND BASE 12.09 8.87 2.660 30546 002YR-24HR POND EAST BASE 12.18 54.75 1.021 228724 010YR-24HR POND EAST BASE 12.18 108.59 1.959 438661 100YR-24HR POND EAST BASE 12.18 184.74 3.318 742956 002YR-24HR POND WEST BASE 12.17 48.42 1.021 193406 010YR-24HR POND WEST BASE 12.17 95.65 1.959 370927 100YR-24HR POND WEST BASE 12.17 162.32 3.318 628235 WATERFRONT OF WEST CLAY - W160409 REVISED DETENTION CALCULATIONS ICPR NODE REPORT Max Warning Max Delta Max Surf Max Max Name Simulation Stage Stage Stage Area Inflow Outflow ft ft ft ft2 cfs cfs ------------------------------------------------------------------------------------------ OUT EAST 002YR-24HR 881.50 881.50 0.0000 0 1.93 0.00 OUT EAST 010YR-24HR 881.50 881.50 0.0000 0 3.56 0.00 OUT EAST 100YR-24HR 881.50 881.50 0.0000 0 4.20 0.00 OUT WEST 002YR-24HR 874.36 874.36 0.0000 0 2.66 0.00 OUT WEST 010YR-24HR 874.36 874.36 0.0000 0 3.66 0.00 OUT WEST 100YR-24HR 874.36 874.36 0.0000 0 4.49 0.00 POND EAST 002YR-24HR 899.05 899.30 0.0030 764926 55.93 1.93 POND EAST 010YR-24HR 899.25 899.30 0.0030 771055 112.01 3.56 POND EAST 100YR-24HR 899.60 899.30 0.0031 781829 191.60 4.20 POND WEST 002YR-24HR 899.16 899.40 0.0050 406481 48.30 2.66 POND WEST 010YR-24HR 899.48 899.40 0.0049 412841 95.54 3.66 POND WEST 100YR-24HR 899.98 899.40 0.0050 422893 161.95 4.49 WATERFRONT OF WEST CLAY - W160409 REVISED DETENTION CALCULATIONS ICPR LINK REPORT Max Max Max Max Name Simulation Flow Delta Q US Stage DS Stage cfs cfs ft ft ----------------------------------------------------------------------- EX EAST WEIR 002YR-24HR 0.00 0.000 0.00 0.00 EX EAST WEIR 010YR-24HR 0.00 0.000 0.00 0.00 EX EAST WEIR 100YR-24HR 0.00 0.000 0.00 0.00 EX WEST WEIR 002YR-24HR 0.00 0.000 0.00 0.00 EX WEST WEIR 010YR-24HR 0.00 0.000 0.00 0.00 EX WEST WEIR 100YR-24HR 0.00 0.000 0.00 0.00 OUT EAST 002YR-24HR 1.93 0.022 899.05 881.50 OUT EAST 010YR-24HR 3.56 0.033 899.25 881.50 OUT EAST 100YR-24HR 4.20 0.046 899.60 881.50 OUT WEST 002YR-24HR 2.66 0.043 899.16 874.36 OUT WEST 010YR-24HR 3.66 0.064 899.48 874.36 OUT WEST 100YR-24HR 4.49 0.069 899.98 874.36 Weir LocationDepth, d (ft)Bottom Width, b (ft) nSlope, S (ft/ft)Side Slope, y (H:V)Area, A (ft2)Wetted Perimeter, Pw (ft)Hydraulic Radius, R (ft)Velocity, V (ft/s) Max. Discharge, Q (cfs)1.25*Max Pond Inflow (cfs)Capacity CheckEAST POND 0.40282.0 0.030 0.0200 4 113.44 285.30 0.40 3.80 240.21 239.50 OKWEST POND 1.00 61.0 0.030 0.0200 4 65.00 69.25 0.94 6.73 205.39 202.44 OKEmergency OverflowWeir CalculationsProject:Date:Job No.:Checked By:Prepared By:Waterfront of West Clay5/7/2018W16-0409AESTPG WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S DETAIL EXHIBIT PIPE SIZING CALCULATIONS 5152536768BLOCK "D"BLOCK "C"EXISTING PONDNP = 898.83100 YR = 899.602YR =899.0510YR = 899.25TOP OF BANK = 900.1SPILLWAY = 899.7EXISTING PONDNP = 898.83100 YR = 899.602YR =899.0510YR = 899.25TOP OF BANK = 900.1SPILLWAY = 899.7FIGURE 3.1 EXISTING CONDITIONS EXHIBIT Date: May 7, 2018 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S WATERFRONT OF WEST CLAY SECTION 5A CARMEL, IN 121st STREET ONLYWEST ROADFM FM FM FM FM FM FM FM FM FM FM FM FM FM FM FM FM FM FM FM FM FME(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A)E(A) 80 79 78 77 T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U)T(U) 159 160 161 162 163 164 165 166 167179180181 178182 183 184 168 49 50 51 52 53 67 68 69 70 71 72156157158 ** BLOCK "B"BLOCK "D"BLOCK "A"BLOCK "C"EXISTING POND NP = 898.83 100 YR = 899.60 2YR =899.05 10YR = 899.25 TOP OF BANK = 900.1 SPILLWAY = 899.7 27 1.77 AC. 30 0.44 AC. 31 0.37 AC. 66 65 64 63 62 61 60 59 58 57 56 5554 * * * 30072.84 AC. 3003 1.17 AC. 3004 0.47 AC. 3005 0.89 AC. 30061.51 AC.30080.07 AC.391.21 AC.400.83 AC.410.63 AC. 3002 0.61 AC. EXISTING POND NP = 898.83 100 YR = 899.60 2YR =899.05 10YR = 899.25 TOP OF BANK = 900.1 SPILLWAY = 899.7 30100.83 AC.30110.51 AC. FIGURE 3.2 STORM INLET BASIN MAP Date: July 25, 2018 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S WATERFRONT OF WEST CLAY SECTION 5A CARMEL, IN Project: Date: Job No.: Checked By: Prepared By: Typical Driveway (Ld, Wd)29 16 Street Width, B-B (Wst)30 Sidewalk Width (W sw)5 Walking Path Width (W wp)8 Str. # Total Pad Number Street Sidewalk Walking Total Impervious Total Pervious Composite Drainage Area, of Length Length Path Length Area Area "c" Value Area, At Apad Driveways Lst Lsw Lwp Aimp Aper (acre) (sq. ft.)(ft) (ft) (ft)(acre)(acre)Cw 27 1.77 27600 10 826 0 1.17 0.60 0.63 31 0.37 3000 1 308 264 0 0.22 0.15 0.58 30 0.44 7720 2 262 242 0 0.32 0.12 0.67 3004 0.47 9725 0 0 0 0 0.22 0.25 0.51 3005 0.89 13100 0 0 0 0 0.30 0.58 0.42 3006 1.51 20010 6 585 0 0.85 0.66 0.57 3007 2.84 18880 0 0 0 0 0.43 2.40 0.30 3008 0.07 1400 0 0 0 0 0.03 0.04 0.48 3010 0.83 12520 4 323 349 0 0.48 0.35 0.61 3011 0.51 5640 2 323 297 0 0.30 0.21 0.63 AES TPG Composite "c" Value Calculations Sanctuary Sect 5A 7/25/2018 W16-0409 Shallow Conc Flow Travel Time:Channel Flow Travel Time:Short Grass0.15 Grass0.03Dense Grass0.24 Concrete0.015Shallow Conc Flow (Unpaved):Pavement0.011 Rip‐Rap0.035Shallow Conc Flow (Paved):2 Yr, 24 Hr Rainfall= 2.66Overland Flow Travel Time:Tc minimum= 5Paved Gutter & Channel FlowTcBasin Len S n T_t Len S n T_t Len S Pave/Un Vel T_t Len A Pw r S n Vel T_t(ft) % (min) (ft) % (min) (ft) % P or U(ft/s) (min) (ft) (sf) (ft) (ft) %(ft/s) (min) (min)27 76 1.70 0.24 13 0 429 0.60 P 1.57 5 0 18.031 70 1.00 0.24 160 141 1.10 p 2.13 10 16.630 74 1.00 0.24 160 146 1.10 P 2.13 10 17.43004 80 1.00 0.24 170 112 1.00 U 1.61 10 18.43005 80 1.00 0.24 170 156 1.30 U 1.84 10 18.73006 81 1.00 0.24 170 315 0.70 P 1.70 30 20.53007 76 1.00 0.24 170 339 1.10 U 1.69 30 19.93008 61 1.00 0.24 140 0 0.00 P 0.00 00 13.93010 80 1.00 0.24 170 178 1.18 P 2.21 10 18.63011 72 1.00 0.24 160 168 1.18 P 2.21 10 17.1Channel FlowOverland FlowChannel FlowMannings Values (n)Overland FlowOverland FlowShallow Conc. FlowSanctuary Sect 5A7/25/2018W16-0409AESTPGTime of ConcentrationCalculationsPrepared By:Checked By:Job No.:Date:Project: Project:Date:Job No.:Checked By:Prepared By:Min. Travel Lane Required = 10 ftStreet Width = 30 ftTotal Flow, % Net Flow, Longitudinal Cross Slope, Manning's Depth at Gutter Spread, Min. Clear TravelQ Flow FlowQnetSlope, SSx Coefficient, Casting, DGS Lane WidthStr. # (cfs) Direction (%) (cfs)(%)(%)N(ft)(ft)(ft)Left 60 0.791.102.080.0130.125.86Right 40 0.520.772.080.0130.115.38Left 30 0.290.772.080.0130.094.32Right 70 0.681.102.080.0130.125.55Left 50 1.050.682.080.0130.157.15Right 50 1.050.882.080.0130.146.81Left 50 0.700.882.080.0130.125.84Right 50 0.700.682.080.0130.136.133010 2.1012.73011 1.39AESTPG30 1.3114.631 0.97Gutter Spread CalculationsSanctuary Sect 5A7/25/2018W16-0409 Project:Date:Job No.:Checked By:Prepared By:Single DoubleWeir Flow (d<0.3')1.4 2.8Orifice Flow (d>0.4')4.6 9.20.7 1.4Gutter Spread3.45 4.60.1Min. Travel Lane Required =10 ft2.00Street Width =30 ftFlow,Depth Depth Street Cross Gutter Spread, Gutter Spread, Clear TravelQ # of Weir, d Orifice, d Slope, Sx GS (weir) GS (orifice) Lane Width Inlet TypeStr. # (cfs) Inlets (ft) (ft) (%)(ft)(ft)(ft)(single/double)30 1.31 1 0.25 0.15 2.089.314.23SINGLE INLET31 0.97 1 0.21 0.08 2.087.111.05SINGLE INLET3010 2.10 2 0.29 0.09 2.0810.901.72DOUBLE INLET3011 1.39 2 0.22 0.04 2.087.600.00DOUBLE INLET11.513.6Casting Length, Cl (ft) =Casting Depth, Cd (ft) =P, 50% Clogged (ft) =A, 50% Clogged (ft2) =Weir Perimeter, P (ft) =Open Area, A (ft2) =Neenah R‐3501‐TR or TLSanctuary Sect 5AW16-0409AESTPG7/25/2018Curb InletCapacity Calculations Project: Date: Job No: Checked By:AES Prepared By:TPG Basin Q, (CFS) Area (Ac.) C-Value Tc (Min.) Intensity 3006 5.11 1.51 0.57 20.5 5.93 Duration Intensity 3005 2.31 0.89 0.42 18.7 6.19 5 9.12 3004 1.50 0.47 0.51 18.4 6.24 10 7.78 FUT 5.24 2.91 0.30 19.9 6.01 15 6.77 20 5.99 27 7.03 1.77 0.63 18.0 6.30 30 4.84 30 1.96 0.51 0.60 17.4 6.40 31 1.44 0.41 0.54 16.6 6.52 Rational Method Flow Calculations Waterfront Sect 5A August 7, 2017 W16-0409 City of Carmel IDF Curve 100-Year Flow Project: Date: Job No: Checked By:AES Prepared By:TPG Cd = 0.8 for broad crested weir Inlet Peak Q, (CFS) Drainage Area (Ac.) Total 100-yr flow Total Area Weir Elevation Width of Weir Normal Depth Max Overflow Ponding Elevation 904.3 SY 109/136 1.77 7.03 1.77 903.20 5.00 0.5 903.7 FY 103/10527 3004 1.50 30 1.96 31 1.44 7.03 903.90 5.00 0.4 Waterfront Sect 5A August 7, 2017 W16-0409 D = (3/2)*((Q)/(Cd*SQRT(2*g)*W)))^(2/3) Flood Routing Calculations 100-Year Normal Depth 0.41 1.50 0.470.47 0.51 4.90 1.39 SY 110/111905.50 5.00 0.2 905.7