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Home My WebLink AboutTechnical Information Report STORMWATER DRAINAGE TECHNICAL REPORT FOR 12955 Old Meridian Remodel 12955 Old Meridian St. Carmel, IN 46032 Prepared by: JPS Consulting Engineers 9365 Counselors Row Suite 116 Indianapolis, IN 46240 16 August 2019 Revised 12 December 2019 Certified by: TABLE OF CONTENTS I.Foreword II.Site Location III.Existing Conditions IV.Storm Sewer Design V.Site Run-Off VI.Stormwater Detention VII.Stormwater Quality VIII.Summary Appendix A Vicinity & Location Map Appendix B Soil and Floodplain Map Appendix C Storm Sewer Calculations Appendix D Inlet Capacity Calculations Appendix E Site Runoff Calculations Appendix F BMP Sizing Calculations STORMWATER DRAINAGE TECHNICAL REPORT I. Foreword The proposed project consists of a new 5,940 square foot single storyu retail/commercial building for future build-out. The project is located south Main St on the east side of Old Meridian St. Construction will take place on a currently developed lot and part of an existing strip mall. The northern portion of the existing building and site improvements on the site will be demolished and the new addition and parking will be reconstructed to fit the new addition. A new dumpster and loading berth will also be constructed. Stormwater quantity will continue to be addressed by the existing dry detention basin that exists to the south of the construction site. Stormwater quality will continue to be handled by the existing dry detention basin which functions as a stormwater quality measure. An additional structural BMP will be added to the project to treat the majority of the disturbed impervious area. Bentley PondPack was used for all hydrologic modeling for the overall site project run-off. Hydraflow Storm Sewers computer program was used to verify the capacity of the existing storm sewers. All input and calculation reports are included in the various appendixes and discussed in more detail in the following sections. This report contains information on the stormwater management for the project including proposed stormwater conveyance/pipe design, and stormwater quality for the project. The proposed stormwater management is intended to meet the City of Carmel Stormwater Technical Standards Manual. II. Site Location The project is located 12955 Old Meridian St just south of Main Street. The project will demolish a portion of the existing building and site improvements on site and construct a new building addition and reconstruct the parking lot. The project site is bordered by Old Meridian St to the west, Carmel Middle School to the east, an empty lot to the north and a strip mall to the south. Land use for the bordering parcels is summarized below: A site location and vicinity maps and a zoning map are included in Appendix A for reference. III. Existing Conditions The existing property is a currently developed property with a strip mall building and parking lot. Existing drainage is generally split east and west. The lot generally surface drains to various inlets on the outskirts of the property. The inlets on the east side of the site are installed right before the grade drops off and no curb is installed. During periods of intense rains, run-off bypasses the inlet and drains onto adjacent Direction Land Use Carmel Zoning North Empty Lot UC South BRU Carmel RE Commercial UC West KG Main LLC UC East Carmel Middle School R-1 properties and ruts out the existing grass. The storm inlets on the property all drain into an existing dry detention basin and stormwater quality measure on the south side of the property. Per the FEMA FIRM Map there are no special flood hazards present at this site. The existing soils on site are Brookston silty clay loam, Br, and Miami silt loam, MmB2. Soil and the FEMA FIRM flood map for the site are included in Appendix B. IV. Storm Sewer Design The storm sewer system for the new addition has been modeled for gravity flow with the Hydraflow Storm Sewers software using the Rational Method and a 10-year frequency design storm. The only new storm system is the roof drain from the new addition. Runoff coefficients were determined by land use and adjusted to the next least pervious soil classification per Camel Stormwater Technical Standards Manual. The majority of storm pipes are existing and have been remodeled to verify capacity. As is shown in the following section, the run-off generated by this project will reduce the run-off generated so pipe capacity should not be a problem. The system has been modeled past the next downstream pipe to include all the pipes to the outlet into the existing detention system in the calculations. Existing storm as-built information was updated per information that was on the original C0-4 but too small to read when printed out. This information was transferred over to C0-5 and made larger so it was legible. In addition, some field verification was conducted to verify pipe direction and inverts where necessary. All existing inlets will be cleaned per notes on the plans, to remove the noted debris found in the structures. Design storm values are per the Carmel Stormwater Technical Standards Manual. The storm sewer calculations are included in Appendix C. In addition, inlets have been sized to calculate the gutter spread to ensure that each existing inlet can accommodate the drainage watershed without being inundated. Per the Carmel Stormwater Technical Standards, each inlet was analyzed at 50% clogged. All of the inlets were able to handle the flows from their respective watersheds without flooding the roadway and allowing a 10ft travel lane. Inlet capacity calculations are included in Appendix D. V. Site Run-Off As a result of this project, run-off leaving the site will be decreased. The limits of hard surface around the building are reduced and the building area is also reduced. The existing soil infiltrating groups are already at the lowest soil Hydrologic Group. Per the soils map, the existing soil hydrologic group values are as follows: Per the Carmel Stormwater Technical Standards Manual, the soil groups were changed to the next less infiltrating group for the purpose of determining the post construction run-off. Since the existing soils were in the D, hydrologic group, the soil properties were not changed to the D hydrologic group. The characteristics of the proposed soil is summarized in the following table: Soil Symbol Soil Name Soil Hydrologic Group Impervious Cn Value Pervious Cn Value Br Brookston Silty Clay Loam D 98 80 MmB2 Miami Silt Loam D 98 80 The pre and post construction run-off leaving the site and flowing into the drainage pond is summarized below: These values represent the run-off generated by the existing conditions and as a result of this project and draining into the existing dry detention basin. The Cn values were calculated using the following formula: 𝐶𝑁= (𝐶𝑁𝑖𝑚𝑜𝑒𝑟𝑢𝑖𝑜𝑢𝑟× 𝑖𝑙𝑜𝑒𝑟𝑟𝑖𝑜𝑟𝑟𝑎𝑟𝑒𝑎)× (𝐶𝑁𝑜𝑒𝑟𝑢𝑖𝑜𝑢𝑟× 𝑜𝑒𝑟𝑟𝑖𝑜𝑟𝑟𝑎𝑟𝑒𝑎) 𝑇𝑜𝑟𝑎𝑙 𝐴𝑟𝑒𝑎 For the pre developed condition the values was calculated as follows: 𝐶𝑁= (98 × 0.63)+(80 × 0.06) 0.69 =96 For the post- developed condition the values were calculated as follows: 𝐶𝑁= (98 × 0.56)+(80 × 0.13) 0.69 =95 Run-off calculations are provided in Appendix E. VI. Stormwater Detention Stormwater Detention is currently being provided for the parcel by an existing dry detention basin and stormwater quality measure. As was calculated in the previous section, this project is reducing the run- off leaving the site as a result of the smaller building area and reduced hardscape in the parking lot. Since the detention basin currently functions with the existing run-off rates, the reduced run-off rates will be able to be detained by the existing detention basin without modifications. The existing detention basin will continue to treat the run-off generated by this construction project and will continue to meet its previously approved stormwater quantity flow rates. No modifications or changes to the dry detention basin are proposed. Soil Hydrologic Group Impervious Cn Value Pervious Cn Value Group D 98 80 Pervious Area Impervious Area Cn Value 2 Year Run- off 10 Year Run- off 100 Year Run-off Pre- Developed 0.06ac 0.63ac 96 2.23 cfs 3.30 cfs 5.67 cfs Post- Developed 0.13ac 0.56ac 95 2.14 cfs 3.22 cfs 5.61 cfs VII. Stormwater Quality Post construction stormwater quality treatment for the site will be provided by quality measures installed with this project. Per the City of Carmel Stormwater Manual, two stormwater quality measures are required for this project. The first BMP will continue to be the existing detention basin and modified wetland. The existing detention basin has areas of extended wet conditions and substantial wetland type plant growth. The basin currently acts as a stormwater quality measure and no modifications are proposed to the basin to allow it to continue to function as a stormwater quality measure for this project and the rest of the parcel. The second required stormwater quality measure will be provided by a new structural BMP Aquaswirl Unit AS-4. This unit will treat the disturbed and newly installed impervious area of the project before the run- off enters the existing stormwater quality measure at the existing detention basin. The water quality flow through structural BMP was calculated as outlined in Chapter 700 of the Carmel Stormwater Manual. The water quality flow rate is summarized below: The water quality curve number was determined using the Percent Impervious and Exhibit 701-1. Based on the Indianapolis Approved BMP list and maximum treatment flows, an Aquaswirl AS-4 BMP will be used. Refer to Appendix F for calculations on sizing the BMP. The Operation & Maintenance Manual for this new BMP will be provided under separate cover. VIII. Summary The 12955 Old Meridian St Remodel project will include the demolition of a portion of the existing building and parking lot and the construction of a new building addition, reworking of the parking lot, and the reuse of the existing storm sewers and infrastructures to drain the new building and the reconstructed parking lot. The project will generate lower run-off and collect water on-site and run it through the existing detention basin. All drainage for the project is designed per the City of Carmel Stormwater Technical Manual. The existing storm sewers have been checked to verify they will continue to convey the 10-year design storm run-off rates. Run-off from the site will decrease in the post developed condition. This decrease in run-off will continue to be detained by the existing detention basin on the site. The existing detention basin serves as an existing BMP and an additional structural AS-4 6 BMP unit will be provided to meet the Carmel requirements. Total Treatment Area Percent Impervious Water Quality Curve Number Water Quality Treatment Rate 0.48 ac 92% 99 0.60cfs APPENDIX A: LOCATION & VICINITY MAPS LOCATION MAP PROJECT LOCATION VICINITY MAP ADDITION W MAIN STREET EDWARD ROSE DEVELOPMENT ZONING: PUD LAND USE: OFFICE BUILDING ZONING:UC LAND USE: APARTMENTS OLD MERIDIAN STREETZONING: UC LAND USE: COMMERCIAL ZONING: R-1 LAND USE: CARMEL MIDDLE SCHOOL APPENDIX B: SOIL AND FLOODPLAIN MAPS USGS The National Map: Orthoimagery. Data refreshed April, 2019. National Flood Hazard Layer FIRMette 0 500 1,000 1,500 2,000250Feet Ü86°9'6.30"W 39°58'51.41"N 86°8'28.84"W 39°58'23.84"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 8/16/2019 at 11:32:38 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 8/16/2019 Page 1 of 3442550044255104425520442553044255404425550442556044255704425580442559044256004425610442550044255104425520442553044255404425550442556044255704425580442559044256004425610572870572880572890572900572910572920572930572940572950 572870 572880 572890 572900 572910 572920 572930 572940 572950 39° 58' 39'' N 86° 8' 48'' W39° 58' 39'' N86° 8' 44'' W39° 58' 35'' N 86° 8' 48'' W39° 58' 35'' N 86° 8' 44'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84 0 25 50 100 150 Feet 0 5 10 20 30 Meters Map Scale: 1:567 if printed on A portrait (8.5" x 11") 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 19, Sep 7, 2018 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 8/16/2019 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI Br Brookston silty clay loam, 0 to 2 percent slopes 0.4 36.0% MmB2 Miami silt loam, 2 to 6 percent slopes, eroded 0.6 64.0% Totals for Area of Interest 1.0 100.0% Soil Map—Hamilton County, Indiana Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 8/16/2019 Page 3 of 3 APPENDIX C: STORM SEWER CALCULATIONS PIVJPS Consulting Engineers - K:\Civil Projects\19JPSC26 Meridian Design Center\Drawings\BASIN.dwg August 17, 2019 - 2:57 PM Nvergatos STORMINLETBASIN MAPNO SCALENBVNBVNBVSTMCONSTRUCTIONDOCUMENTS19 AUGUST 201919JPSC26EX. BASIN 1TOTAL AREA: 0.17acIMPERVIOUS: 0.15acPERVIOUS: 0.02acEX. BASIN 2TOTAL AREA: 0.17acIMPERVIOUS: 0.15acPERVIOUS: 0.02acROOFTOTAL AREA: 0.13acIMPERVIOUS: 0.13acEXISTING INLETTOTAL AREA: 0.25acIMPERVIOUS: 0.25ac 1 E xistin g Inl e t t o D ete ntio n 2 EXISTING MH to EXISTING INLET3 EX BASIN 2 to EXISTING MH4 EX BASIN 1 to EX BASIN 25RO OF to EX BA S I N 2 Outfall EXISTING INLET EXISTING MH EX BASIN 2 EX BASIN 1 ROOF Hydraflow Storm Sewers Plan Project File: 12955 Meridian Storm Calcs.stm Number of lines: 5 Date: 12-12-2019 Hydraflow Storm Sewers 2008 v12.01 Storm Sewer Summary Report Page 1 Line Line ID Flow Line Line Line Invert Invert Line HGL HGL Minor HGL Dns Junction No. rate size shape length EL Dn EL Up slope down up loss Junct line Type (cfs) (in) (ft) (ft) (ft) (%) (ft) (ft) (ft) (ft) No. 1 Existing Inlet to Detention 3.39 12 Cir 42 847.24 848.03 1.881 848.02 848.81 n/a 849.49 i End DropGrate 2 EXISTING MH to EXISTING INLET 2.55 12 Cir 39 848.53 848.97 1.128 849.49 849.65 n/a 850.13 i 1 Manhole 3 EX BASIN 2 to EXISTING MH 2.58 12 Cir 43 849.15 850.48 3.080 850.13 851.16 n/a 851.65 i 2 DropGrate 4 EX BASIN 1 to EX BASIN 2 0.97 12 Cir 95 850.68 852.40 1.811 851.65 852.82 n/a 853.00 i 3 DropGrate 5 ROOF to EX BASIN 2 0.82 10 Cir 67 851.53 852.20 1.000 851.88 852.60 n/a 852.80 i 3 Manhole Project File: 12955 Meridian Storm Calcs.stm Number of lines: 5 Run Date: 12-12-2019 NOTES: Return period = 10 Yrs. ; i - Inlet control. Hydraflow Storm Sewers 2008 v12.01 Storm Sewer Inventory Report Page 1 Line Alignment Flow Data Physical Data Line ID No. Dnstr Line Defl Junc Known Drng Runoff Inlet Invert Line Invert Line Line N J-loss Inlet/ line length angle type Q area coeff time El Dn slope El Up size shape value coeff Rim El No. (ft) (deg) (cfs) (ac) (C) (min) (ft) (%) (ft) (in) (n) (K) (ft) 1 End 42 -136 DrGrt 0.00 0.15 0.90 5.0 847.24 1.88 848.03 12 Cir 0.012 1.50 851.95 Existing Inlet to 2 1 39 88 MH 0.00 0.00 0.00 0.0 848.53 1.13 848.97 12 Cir 0.012 0.70 855.06 EXISTING MH to EXI 3 2 43 -41 DrGrt 0.00 0.17 0.82 5.0 849.15 3.08 850.48 12 Cir 0.012 1.41 852.72 EX BASIN 2 to EXIS 4 3 95 -1 DrGrt 0.00 0.17 0.82 5.0 850.68 1.81 852.40 12 Cir 0.012 1.00 854.49 EX BASIN 1 to EX B 5 3 67 -68 MH 0.00 0.13 0.90 5.0 851.53 1.00 852.20 10 Cir 0.013 1.00 856.20 ROOF to EX BASIN 2 Project File: 12955 Meridian Storm Calcs.stm Number of lines: 5 Date: 12-12-2019 Hydraflow Storm Sewers 2008 v12.01 Structure Report Page 1 Struct Structure ID Junction Rim Line Out Line InStructure No. Type Elev. Size Shape Invert Size Shape InvertShape Length Width (ft) (in) (ft) (in) (ft)(ft) (ft) 1 EXISTING INLET DropGrate 851.95 Cir 4.00 4.00 12 Cir 848.03 12 Cir 848.53 2 EXISTING MH Manhole 855.06 Cir 4.00 4.00 12 Cir 848.97 12 Cir 849.15 3 EX BASIN 2 DropGrate 852.72 Cir 4.00 4.00 12 Cir 850.48 12 Cir 850.68 10 Cir 851.53 4 EX BASIN 1 DropGrate 854.49 Cir 4.00 4.00 12 Cir 852.40 5 ROOF Manhole 856.20 Cir 4.00 4.00 10 Cir 852.20 Project File: 12955 Meridian Storm Calcs.stm Number of Structures: 5 Run Date: 12-12-2019 Hydraflow Storm Sewers 2008 v12.01 Storm Sewer Tabulation Page 1 Station Len Drng Area Rnoff Area x C Tc Rain Total Cap Vel Pipe Invert Elev HGL Elev Grnd / Rim Elev Line ID coeff (I) flow full Line To Incr Total Incr Total Inlet Syst Size Slope Dn Up Dn Up Dn Up Line (ft) (ac) (ac) (C) (min) (min) (in/hr) (cfs) (cfs) (ft/s) (in) (%) (ft) (ft) (ft) (ft) (ft) (ft) 1 End 42 0.15 0.62 0.90 0.14 0.53 5.0 6.7 6.4 3.39 5.29 5.15 12 1.88 847.24 848.03 848.02 848.81 847.64 851.95 Existing Inlet to De 2 1 39 0.00 0.47 0.00 0.00 0.40 0.0 6.5 6.4 2.55 4.10 3.90 12 1.13 848.53 848.97 849.49 849.65 851.95 855.06 EXISTING MH to 3 2 43 0.17 0.47 0.82 0.14 0.40 5.0 6.3 6.5 2.58 6.77 3.91 12 3.08 849.15 850.48 850.13 851.16 855.06 852.72 EX BASIN 2 to EXI 4 3 95 0.17 0.17 0.82 0.14 0.14 5.0 5.0 7.0 0.97 5.19 2.19 12 1.81 850.68 852.40 851.65 852.82 852.72 854.49 EX BASIN 1 to EX 5 3 67 0.13 0.13 0.90 0.12 0.12 5.0 5.0 7.0 0.82 2.19 3.43 10 1.00 851.53 852.20 851.88 852.60 852.72 856.20 ROOF to EX BASI Project File: 12955 Meridian Storm Calcs.stm Number of lines: 5 Run Date: 12-12-2019 NOTES: Intensity = 57.92 / (Inlet time + 9.10) ^ 0.80; Return period = 10 Yrs. ; c = cir e = ellip b = box Hydraflow Storm Sewers 2008 v12.01 Inlet Report Page 1 Line Inlet ID Q = Q Q Q Junc Curb Inlet Grate Inlet Gutter Inlet Byp No CIA carry capt byp type line Ht L area L W So W Sw Sx n Depth Spread Depth Spread Depr No (cfs) (cfs) (cfs) (cfs) (in) (ft) (sqft) (ft) (ft) (ft/ft) (ft) (ft/ft) (ft/ft) (ft) (ft) (ft) (ft) (in) 1 EXISTING INLET 0.94 0.00 0.94 0.00 DrGrt 4.0 4.00 2.00 2.00 2.00 Sag 2.00 0.020 0.020 0.013 0.12 13.54 0.12 13.54 0.0 Off 2 EXISTING MH 0.00 0.00 0.00 0.00 MH 4.0 4.00 2.00 2.00 2.00 Sag 2.00 0.020 0.020 0.013 0.00 0.00 0.00 0.00 0.0 1 3 EX BASIN 2 0.97 0.82 1.79 0.00 DrGrt 4.0 4.00 2.00 2.00 2.00 Sag 2.00 0.020 0.020 0.013 0.18 19.71 0.18 19.71 0.0 2 4 EX BASIN 1 0.97 0.00 0.97 0.00 DrGrt 4.0 4.00 2.00 2.00 2.00 Sag 2.00 0.020 0.020 0.013 0.12 13.79 0.12 13.79 0.0 3 5 ROOF 0.82 0.00 0.00 0.82 MH 4.0 4.00 2.00 2.00 2.00 Sag 2.00 0.050 0.020 0.013 0.00 0.00 0.00 0.00 0.0 3 Project File: 12955 Meridian Storm Calcs.stm Number of lines: 5 Run Date: 12-12-2019 NOTES: Inlet N-Values = 0.01 ;Intensity = 57.92 / (Inlet time + 9.10) ^ 0.80; Return period = 10 Yrs. ; * Indicates Known Q added. All curb inlets are Horiz throat. Hydraflow Storm Sewers 2008 v12.01 Hydraulic Grade Line Computations Page 1 Line Size Q Downstream Len Upstream Check JL Minor coeff loss Invert HGL Depth Area Vel Vel EGL Sf Invert HGL Depth Area Vel Vel EGL Sf Ave Enrgy elev elev head elev elev elev head elev Sf loss (in) (cfs) (ft) (ft) (ft) (sqft) (ft/s) (ft) (ft) (%) (ft) (ft) (ft) (ft) (sqft) (ft/s) (ft) (ft) (%) (%) (ft) (K) (ft) 1 12 3.39 847.24 848.02 0.78 0.66 5.15 0.41 848.43 n/a 42 848.03 848.81 0.78** 0.66 5.15 0.41 849.22i n/a n/a n/a 1.50 n/a 2 12 2.55 848.53 849.49 0.96 0.78 3.29 0.17 849.66 n/a 39 848.97 849.65 j 0.68** 0.57 4.50 0.32 849.96i n/a n/a n/a 0.70 n/a 3 12 2.58 849.15 850.13 0.98 0.78 3.30 0.17 850.30 n/a 43 850.48 851.16 j 0.68** 0.57 4.53 0.32 851.48i n/a n/a n/a 1.41 n/a 4 12 0.97 850.68 851.65 0.97 0.78 1.25 0.02 851.67 n/a 95 852.40 852.82 j 0.42** 0.31 3.12 0.15 852.97i n/a n/a n/a 1.00 n/a 5 10 0.82 851.53 851.88 0.35* 0.22 3.72 0.22 852.10 n/a 67 852.20 852.60 0.40** 0.26 3.14 0.15 852.75i n/a n/a n/a 1.00 n/a Project File: 12955 Meridian Storm Calcs.stm Number of lines: 5 Run Date: 12-12-2019 Notes: * Normal depth assumed.; ** Critical depth.; j-Line contains hyd. jump. ; c = cir e = ellip b = box Hydraflow Storm Sewers 2008 v12.01 MyReport Page 1 Line Inlet Drng Flow Vel Capac Runoff Line Line Vel Invert Invert Gnd/Rim Cover Gnd/Rim Cover n-val No. ID Area Rate Dn Full Coeff Size Length Up Up Dn El Up Up El Dn Dn Pipe (ac) (cfs) (ft/s) (cfs) (C) (in) (ft) (ft/s) (ft) (ft) (ft) (ft) (ft) (ft) 1 EXISTING INLET 0.15 3.39 5.15 5.29 0.90 12 42 5.15 848.03 847.24 851.95 2.92 847.64 -0.60 0.012 2 EXISTING MH 0.00 2.55 3.29 4.10 0.00 12 39 4.50 848.97 848.53 855.06 5.09 851.95 2.42 0.012 3 EX BASIN 2 0.17 2.58 3.30 6.77 0.82 12 43 4.53 850.48 849.15 852.72 1.24 855.06 4.91 0.012 4 EX BASIN 1 0.17 0.97 1.25 5.19 0.82 12 95 3.12 852.40 850.68 854.49 1.09 852.72 1.04 0.012 5 ROOF 0.13 0.82 3.72 2.19 0.90 10 67 3.14 852.20 851.53 856.20 3.17 852.72 0.36 0.013 Project File: 12955 Meridian Storm Calcs.stm Number of lines: 5 Date: 12-12-2019 NOTES: i Inlet control; ** Critical depth Hydraflow Storm Sewers 2008 APPENDIX D: INLET CAPACITY CALCULATIONS Project Name: Structure: Job Number: 19JPSC26 Date: Design Depth of Water Over Grate (ft.): 0.50 % Plugged: 50%0.50 Casting:3405 Perimeter (ft): 7.90 Open Area (sf): 1.50 Solve For Qi Allowable: Note: Formulas Obtained From Neenah Foundry Company Inlet Capacity Worksheets Transitional Flow Eqn: Qi = ((QOrifice + QWeir)/2) x .80 = ((2.6+4.6)/2) x .80 = 2.6 cfs Orifice Flow Eqn:Weir Flow Eqn: Qi =[( 0.6)(A)(Pp)] x [(2)(g)(h)]1/2 Qi =3.3(P)(Pp)(dw)1.5 Where:Where: Qi = Inlet Capacity (CFS)Qi = Inlet Capacity (CFS) A = Fee open area of grate (sf)P = Perimeter of Grate Opening (ft) g = 32.2 (ft per sec/sec)dw = Depth Of Water Above Grate h = Head (ft) (Water Depth)Pp = Percent Plugged Pp = Percent Plugged Qi = 2.6 cfs allowable Qi = Use Orifice Flow Equation 2.6 2.6 4.60 Allowable Inlet Flow = 2.6 cfs Solve For Q Actual: Rational Formula:Q10 = C x I x A Where: Q10 = Flow from 10 year storm event C = Runoff Coefficient (unitless) I = Rainfall intensity (in/hr) A = Watershed area (ac) C = 0.82 I = 6.12 in/hr T.C. =5.0 min A = 0.17 ac 0.9 Actual Inlet Flow = 0.9 cfs Q Comparison Result:Casting Is Sufficient Note: At this depth, transitional flow is anticipated. The allowable inlet flow shown is 80% of the average of the weir and orifice flow due to vortex action. This adjustment value obtained from Neenah Foundry technical division. Discharge vs. Depth on Grate Calculation 12955 Old Meridian Remodel EX BASIN 1 For Inlets In Sag Conditions 16-Aug-19 Project Name: Structure: Job Number: 19JPSC26 Date: Design Depth of Water Over Grate (ft.): 0.50 % Plugged: 50%0.50 Casting:3405 Perimeter (ft): 7.90 Open Area (sf): 1.50 Solve For Qi Allowable: Note: Formulas Obtained From Neenah Foundry Company Inlet Capacity Worksheets Transitional Flow Eqn: Qi = ((QOrifice + QWeir)/2) x .80 = ((2.6+4.6)/2) x .80 = 2.6 cfs Orifice Flow Eqn:Weir Flow Eqn: Qi =[( 0.6)(A)(Pp)] x [(2)(g)(h)]1/2 Qi =3.3(P)(Pp)(dw)1.5 Where:Where: Qi = Inlet Capacity (CFS)Qi = Inlet Capacity (CFS) A = Fee open area of grate (sf)P = Perimeter of Grate Opening (ft) g = 32.2 (ft per sec/sec)dw = Depth Of Water Above Grate h = Head (ft) (Water Depth)Pp = Percent Plugged Pp = Percent Plugged Qi = 2.6 cfs allowable Qi = Use Orifice Flow Equation 2.6 2.6 4.60 Allowable Inlet Flow = 2.6 cfs Solve For Q Actual: Rational Formula:Q10 = C x I x A Where: Q10 = Flow from 10 year storm event C = Runoff Coefficient (unitless) I = Rainfall intensity (in/hr) A = Watershed area (ac) C = 0.82 I = 6.12 in/hr T.C. =5.0 min A = 0.17 ac 0.9 Actual Inlet Flow = 0.9 cfs Q Comparison Result:Casting Is Sufficient Note: At this depth, transitional flow is anticipated. The allowable inlet flow shown is 80% of the average of the weir and orifice flow due to vortex action. This adjustment value obtained from Neenah Foundry technical division. Discharge vs. Depth on Grate Calculation For Inlets In Sag Conditions 12955 Old Meridian Remodel EX BASIN 2 16-Aug-19 APPENDIX E: SITE RUNOFF CALCULATIONS PREDEVELOPEDBASIN MAPNO SCALENBVNBVNBVPRECONSTRUCTIONDOCUMENTS19 AUGUST 201919JPSC26TOTAL AREA: 0.69acIMPERVIOUS: 0.63acPERVIOUS: 0.06ac NEW BUILDING ADDITION5,940 SQ FTFINISHED FLOOR ELEVATION: 856.20TJPS Consulting Engineers - K:\Civil Projects\19JPSC26 Meridian Design Center\Drawings\BASIN.dwg August 17, 2019 - 2:29 PM Nvergatos POSTDEVELOPEDBASIN MAPNO SCALENBVNBVNBVPOSTCONSTRUCTIONDOCUMENTS19 AUGUST 201919JPSC26TOTAL AREA: 0.69acIMPERVIOUS: 0.56acPERVIOUS: 0.13ac Table of Contents 22Unit Hydrograph Summary, 100 years 22Unit Hydrograph Summary, 100 years 18Unit Hydrograph Summary, 10 years 18Unit Hydrograph Summary, 10 years 14Unit Hydrograph Summary, 2 years 14Unit Hydrograph Summary, 2 years CM-1 10Time-Depth Curve, 2 years 10Time-Depth Curve, 2 years 6Time-Depth Curve, 100 years 6Time-Depth Curve, 100 years 2Time-Depth Curve, 10 years 2Time-Depth Curve, 10 years Time-Depth - 1 1Master Network Summary 12955 Old Meridian Remodel Subsection: Master Network Summary Catchments Summary Peak Flow (ft³/s) Time to Peak (hours) Hydrograph Volume (ac-ft) Return Event (years) ScenarioLabel 2.2311.9000.1302Pre-Development 2 year CM-1 2.1411.9000.1222Post-Development 2 year CM-1 3.2211.9000.18710Post-Development 10 year CM-1 3.3011.9000.19610Pre-Development 10 year CM-1 5.6711.9000.347100Pre-Development 100 year CM-1 5.6111.9000.337100Post-Development 100 year CM-1 Node Summary Peak Flow (ft³/s) Time to Peak (hours) Hydrograph Volume (ac-ft) Return Event (years) ScenarioLabel 2.2311.9000.1302Pre-Development 2 year O-1 2.1411.9000.1222Post-Development 2 year O-1 3.2211.9000.18710Post-Development 10 year O-1 3.3011.9000.19610Pre-Development 10 year O-1 5.6711.9000.347100Pre-Development 100 year O-1 5.6111.9000.337100Post-Development 100 year O-1 Page 1 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 10 year stormLabel: Time-Depth - 1 Return Event: 10 yearsSubsection: Time-Depth Curve Time-Depth Curve: 10 year storm 10 year stormLabel hours0.000Start Time hours0.100Increment hours24.000End Time years10Return Event CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 0.00.00.00.00.00.000 0.00.00.00.00.00.500 0.10.10.00.00.01.000 0.10.10.10.10.11.500 0.10.10.10.10.12.000 0.10.10.10.10.12.500 0.20.10.10.10.13.000 0.20.20.20.20.23.500 0.20.20.20.20.24.000 0.20.20.20.20.24.500 0.30.30.30.20.25.000 0.30.30.30.30.35.500 0.30.30.30.30.36.000 0.40.40.40.30.36.500 0.40.40.40.40.47.000 0.50.40.40.40.47.500 0.50.50.50.50.58.000 0.60.50.50.50.58.500 0.60.60.60.60.69.000 0.70.70.70.60.69.500 0.80.70.70.70.710.000 0.90.80.80.80.810.500 1.01.01.00.90.911.000 2.21.61.41.21.111.500 2.82.72.72.62.512.000 2.92.92.92.82.812.500 3.03.03.03.03.013.000 3.13.13.13.13.113.500 3.23.23.23.23.114.000 3.33.23.23.23.214.500 3.33.33.33.33.315.000 3.43.43.33.33.315.500 3.43.43.43.43.416.000 3.43.43.43.43.416.500 Page 2 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 10 year stormLabel: Time-Depth - 1 Return Event: 10 yearsSubsection: Time-Depth Curve CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 3.53.53.53.53.517.000 3.53.53.53.53.517.500 3.63.53.53.53.518.000 3.63.63.63.63.618.500 3.63.63.63.63.619.000 3.63.63.63.63.619.500 3.73.73.73.73.620.000 3.73.73.73.73.720.500 3.73.73.73.73.721.000 3.73.73.73.73.721.500 3.83.83.83.73.722.000 3.83.83.83.83.822.500 3.83.83.83.83.823.000 3.83.83.83.83.823.500 (N/A)(N/A)(N/A)(N/A)3.824.000 Page 3 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 10 year stormLabel: Time-Depth - 1 Return Event: 10 yearsSubsection: Time-Depth Curve Time-Depth Curve: 10 year storm 10 year stormLabel hours0.000Start Time hours0.100Increment hours24.000End Time years10Return Event CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 0.00.00.00.00.00.000 0.00.00.00.00.00.500 0.10.10.00.00.01.000 0.10.10.10.10.11.500 0.10.10.10.10.12.000 0.10.10.10.10.12.500 0.20.10.10.10.13.000 0.20.20.20.20.23.500 0.20.20.20.20.24.000 0.20.20.20.20.24.500 0.30.30.30.20.25.000 0.30.30.30.30.35.500 0.30.30.30.30.36.000 0.40.40.40.30.36.500 0.40.40.40.40.47.000 0.50.40.40.40.47.500 0.50.50.50.50.58.000 0.60.50.50.50.58.500 0.60.60.60.60.69.000 0.70.70.70.60.69.500 0.80.70.70.70.710.000 0.90.80.80.80.810.500 1.01.01.00.90.911.000 2.21.61.41.21.111.500 2.82.72.72.62.512.000 2.92.92.92.82.812.500 3.03.03.03.03.013.000 3.13.13.13.13.113.500 3.23.23.23.23.114.000 3.33.23.23.23.214.500 3.33.33.33.33.315.000 3.43.43.33.33.315.500 3.43.43.43.43.416.000 3.43.43.43.43.416.500 Page 4 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 10 year stormLabel: Time-Depth - 1 Return Event: 10 yearsSubsection: Time-Depth Curve CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 3.53.53.53.53.517.000 3.53.53.53.53.517.500 3.63.53.53.53.518.000 3.63.63.63.63.618.500 3.63.63.63.63.619.000 3.63.63.63.63.619.500 3.73.73.73.73.620.000 3.73.73.73.73.720.500 3.73.73.73.73.721.000 3.73.73.73.73.721.500 3.83.83.83.73.722.000 3.83.83.83.83.822.500 3.83.83.83.83.823.000 3.83.83.83.83.823.500 (N/A)(N/A)(N/A)(N/A)3.824.000 Page 5 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 100 year stormLabel: Time-Depth - 1 Return Event: 100 yearsSubsection: Time-Depth Curve Time-Depth Curve: 100 year storm 100 year stormLabel hours0.000Start Time hours0.100Increment hours24.000End Time years100Return Event CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 0.00.00.00.00.00.000 0.10.10.00.00.00.500 0.10.10.10.10.11.000 0.10.10.10.10.11.500 0.20.20.20.10.12.000 0.20.20.20.20.22.500 0.30.20.20.20.23.000 0.30.30.30.30.33.500 0.30.30.30.30.34.000 0.40.40.40.40.44.500 0.40.40.40.40.45.000 0.50.50.50.50.55.500 0.60.60.50.50.56.000 0.60.60.60.60.66.500 0.70.70.70.70.67.000 0.80.70.70.70.77.500 0.80.80.80.80.88.000 0.90.90.90.90.98.500 1.01.01.01.00.99.000 1.11.11.11.11.19.500 1.31.31.21.21.210.000 1.51.41.41.41.310.500 1.81.71.61.61.511.000 3.72.82.32.01.811.500 4.74.64.54.44.312.000 4.94.94.94.84.712.500 5.15.15.15.05.013.000 5.35.25.25.25.213.500 5.45.45.35.35.314.000 5.55.55.55.45.414.500 5.65.65.65.55.515.000 5.75.75.65.65.615.500 5.75.75.75.75.716.000 5.85.85.85.85.816.500 Page 6 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 100 year stormLabel: Time-Depth - 1 Return Event: 100 yearsSubsection: Time-Depth Curve CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 5.95.95.95.85.817.000 5.95.95.95.95.917.500 6.06.06.06.05.918.000 6.06.06.06.06.018.500 6.16.16.16.16.119.000 6.16.16.16.16.119.500 6.26.26.26.26.120.000 6.26.26.26.26.220.500 6.36.36.26.26.221.000 6.36.36.36.36.321.500 6.36.36.36.36.322.000 6.46.46.46.46.322.500 6.46.46.46.46.423.000 6.56.46.46.46.423.500 (N/A)(N/A)(N/A)(N/A)6.524.000 Page 7 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 100 year stormLabel: Time-Depth - 1 Return Event: 100 yearsSubsection: Time-Depth Curve Time-Depth Curve: 100 year storm 100 year stormLabel hours0.000Start Time hours0.100Increment hours24.000End Time years100Return Event CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 0.00.00.00.00.00.000 0.10.10.00.00.00.500 0.10.10.10.10.11.000 0.10.10.10.10.11.500 0.20.20.20.10.12.000 0.20.20.20.20.22.500 0.30.20.20.20.23.000 0.30.30.30.30.33.500 0.30.30.30.30.34.000 0.40.40.40.40.44.500 0.40.40.40.40.45.000 0.50.50.50.50.55.500 0.60.60.50.50.56.000 0.60.60.60.60.66.500 0.70.70.70.70.67.000 0.80.70.70.70.77.500 0.80.80.80.80.88.000 0.90.90.90.90.98.500 1.01.01.01.00.99.000 1.11.11.11.11.19.500 1.31.31.21.21.210.000 1.51.41.41.41.310.500 1.81.71.61.61.511.000 3.72.82.32.01.811.500 4.74.64.54.44.312.000 4.94.94.94.84.712.500 5.15.15.15.05.013.000 5.35.25.25.25.213.500 5.45.45.35.35.314.000 5.55.55.55.45.414.500 5.65.65.65.55.515.000 5.75.75.65.65.615.500 5.75.75.75.75.716.000 5.85.85.85.85.816.500 Page 8 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 100 year stormLabel: Time-Depth - 1 Return Event: 100 yearsSubsection: Time-Depth Curve CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 5.95.95.95.85.817.000 5.95.95.95.95.917.500 6.06.06.06.05.918.000 6.06.06.06.06.018.500 6.16.16.16.16.119.000 6.16.16.16.16.119.500 6.26.26.26.26.120.000 6.26.26.26.26.220.500 6.36.36.26.26.221.000 6.36.36.36.36.321.500 6.36.36.36.36.322.000 6.46.46.46.46.322.500 6.46.46.46.46.423.000 6.56.46.46.46.423.500 (N/A)(N/A)(N/A)(N/A)6.524.000 Page 9 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 2 year stormLabel: Time-Depth - 1 Return Event: 2 yearsSubsection: Time-Depth Curve Time-Depth Curve: 2 year storm 2 year stormLabel hours0.000Start Time hours0.100Increment hours24.000End Time years2Return Event CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 0.00.00.00.00.00.000 0.00.00.00.00.00.500 0.00.00.00.00.01.000 0.10.10.00.00.01.500 0.10.10.10.10.12.000 0.10.10.10.10.12.500 0.10.10.10.10.13.000 0.10.10.10.10.13.500 0.10.10.10.10.14.000 0.20.20.20.20.14.500 0.20.20.20.20.25.000 0.20.20.20.20.25.500 0.20.20.20.20.26.000 0.30.30.20.20.26.500 0.30.30.30.30.37.000 0.30.30.30.30.37.500 0.30.30.30.30.38.000 0.40.40.40.40.48.500 0.40.40.40.40.49.000 0.50.50.50.40.49.500 0.50.50.50.50.510.000 0.60.60.60.60.510.500 0.70.70.70.60.611.000 1.51.10.90.80.811.500 1.91.91.91.81.812.000 2.02.02.02.02.012.500 2.12.12.12.12.113.000 2.22.22.12.12.113.500 2.22.22.22.22.214.000 2.32.32.22.22.214.500 2.32.32.32.32.315.000 2.32.32.32.32.315.500 2.42.42.42.32.316.000 2.42.42.42.42.416.500 Page 10 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 2 year stormLabel: Time-Depth - 1 Return Event: 2 yearsSubsection: Time-Depth Curve CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 2.42.42.42.42.417.000 2.42.42.42.42.417.500 2.52.52.52.52.418.000 2.52.52.52.52.518.500 2.52.52.52.52.519.000 2.52.52.52.52.519.500 2.52.52.52.52.520.000 2.62.62.62.62.520.500 2.62.62.62.62.621.000 2.62.62.62.62.621.500 2.62.62.62.62.622.000 2.62.62.62.62.622.500 2.62.62.62.62.623.000 2.72.72.72.62.623.500 (N/A)(N/A)(N/A)(N/A)2.724.000 Page 11 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 2 year stormLabel: Time-Depth - 1 Return Event: 2 yearsSubsection: Time-Depth Curve Time-Depth Curve: 2 year storm 2 year stormLabel hours0.000Start Time hours0.100Increment hours24.000End Time years2Return Event CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 0.00.00.00.00.00.000 0.00.00.00.00.00.500 0.00.00.00.00.01.000 0.10.10.00.00.01.500 0.10.10.10.10.12.000 0.10.10.10.10.12.500 0.10.10.10.10.13.000 0.10.10.10.10.13.500 0.10.10.10.10.14.000 0.20.20.20.20.14.500 0.20.20.20.20.25.000 0.20.20.20.20.25.500 0.20.20.20.20.26.000 0.30.30.20.20.26.500 0.30.30.30.30.37.000 0.30.30.30.30.37.500 0.30.30.30.30.38.000 0.40.40.40.40.48.500 0.40.40.40.40.49.000 0.50.50.50.40.49.500 0.50.50.50.50.510.000 0.60.60.60.60.510.500 0.70.70.70.60.611.000 1.51.10.90.80.811.500 1.91.91.91.81.812.000 2.02.02.02.02.012.500 2.12.12.12.12.113.000 2.22.22.12.12.113.500 2.22.22.22.22.214.000 2.32.32.22.22.214.500 2.32.32.32.32.315.000 2.32.32.32.32.315.500 2.42.42.42.32.316.000 2.42.42.42.42.416.500 Page 12 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 2 year stormLabel: Time-Depth - 1 Return Event: 2 yearsSubsection: Time-Depth Curve CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 2.42.42.42.42.417.000 2.42.42.42.42.417.500 2.52.52.52.52.418.000 2.52.52.52.52.518.500 2.52.52.52.52.519.000 2.52.52.52.52.519.500 2.52.52.52.52.520.000 2.62.62.62.62.520.500 2.62.62.62.62.621.000 2.62.62.62.62.621.500 2.62.62.62.62.622.000 2.62.62.62.62.622.500 2.62.62.62.62.623.000 2.72.72.72.62.623.500 (N/A)(N/A)(N/A)(N/A)2.724.000 Page 13 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 2 year stormLabel: CM-1 Return Event: 2 yearsSubsection: Unit Hydrograph Summary 2 year stormStorm Event years2Return Event hours24.000Duration in2.7Depth hours0.083Time of Concentration (Composite) acres0.690Area (User Defined) hours0.011Computational Time Increment hours11.922Time to Peak (Computed) ft³/s2.19Flow (Peak, Computed) hours0.050Output Increment hours11.900Time to Flow (Peak Interpolated Output) ft³/s2.14Flow (Peak Interpolated Output) Drainage Area 95.000SCS CN (Composite) acres0.690Area (User Defined) in0.5Maximum Retention (Pervious) in0.1Maximum Retention (Pervious, 20 percent) Cumulative Runoff in2.1Cumulative Runoff Depth (Pervious) ac-ft0.122Runoff Volume (Pervious) Hydrograph Volume (Area under Hydrograph curve) ac-ft0.122Volume SCS Unit Hydrograph Parameters hours0.083Time of Concentration (Composite) hours0.011Computational Time Increment 483.432Unit Hydrograph Shape Factor 0.749K Factor 1.670Receding/Rising, Tr/Tp Page 14 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 2 year stormLabel: CM-1 Return Event: 2 yearsSubsection: Unit Hydrograph Summary SCS Unit Hydrograph Parameters ft³/s9.38Unit peak, qp hours0.056Unit peak time, Tp hours0.222Unit receding limb, Tr hours0.278Total unit time, Tb Page 15 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 2 year stormLabel: CM-1 Return Event: 2 yearsSubsection: Unit Hydrograph Summary 2 year stormStorm Event years2Return Event hours24.000Duration in2.7Depth hours0.083Time of Concentration (Composite) acres0.690Area (User Defined) hours0.011Computational Time Increment hours11.922Time to Peak (Computed) ft³/s2.28Flow (Peak, Computed) hours0.050Output Increment hours11.900Time to Flow (Peak Interpolated Output) ft³/s2.23Flow (Peak Interpolated Output) Drainage Area 96.435SCS CN (Composite) acres0.690Area (User Defined) in0.4Maximum Retention (Pervious) in0.1Maximum Retention (Pervious, 20 percent) Cumulative Runoff in2.3Cumulative Runoff Depth (Pervious) ac-ft0.130Runoff Volume (Pervious) Hydrograph Volume (Area under Hydrograph curve) ac-ft0.130Volume SCS Unit Hydrograph Parameters hours0.083Time of Concentration (Composite) hours0.011Computational Time Increment 483.432Unit Hydrograph Shape Factor 0.749K Factor 1.670Receding/Rising, Tr/Tp Page 16 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 2 year stormLabel: CM-1 Return Event: 2 yearsSubsection: Unit Hydrograph Summary SCS Unit Hydrograph Parameters ft³/s9.38Unit peak, qp hours0.056Unit peak time, Tp hours0.222Unit receding limb, Tr hours0.278Total unit time, Tb Page 17 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 10 year stormLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph Summary 10 year stormStorm Event years10Return Event hours24.000Duration in3.8Depth hours0.083Time of Concentration (Composite) acres0.690Area (User Defined) hours0.011Computational Time Increment hours11.922Time to Peak (Computed) ft³/s3.28Flow (Peak, Computed) hours0.050Output Increment hours11.900Time to Flow (Peak Interpolated Output) ft³/s3.22Flow (Peak Interpolated Output) Drainage Area 95.000SCS CN (Composite) acres0.690Area (User Defined) in0.5Maximum Retention (Pervious) in0.1Maximum Retention (Pervious, 20 percent) Cumulative Runoff in3.3Cumulative Runoff Depth (Pervious) ac-ft0.188Runoff Volume (Pervious) Hydrograph Volume (Area under Hydrograph curve) ac-ft0.187Volume SCS Unit Hydrograph Parameters hours0.083Time of Concentration (Composite) hours0.011Computational Time Increment 483.432Unit Hydrograph Shape Factor 0.749K Factor 1.670Receding/Rising, Tr/Tp Page 18 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 10 year stormLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph Summary SCS Unit Hydrograph Parameters ft³/s9.38Unit peak, qp hours0.056Unit peak time, Tp hours0.222Unit receding limb, Tr hours0.278Total unit time, Tb Page 19 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 10 year stormLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph Summary 10 year stormStorm Event years10Return Event hours24.000Duration in3.8Depth hours0.083Time of Concentration (Composite) acres0.690Area (User Defined) hours0.011Computational Time Increment hours11.922Time to Peak (Computed) ft³/s3.36Flow (Peak, Computed) hours0.050Output Increment hours11.900Time to Flow (Peak Interpolated Output) ft³/s3.30Flow (Peak Interpolated Output) Drainage Area 96.435SCS CN (Composite) acres0.690Area (User Defined) in0.4Maximum Retention (Pervious) in0.1Maximum Retention (Pervious, 20 percent) Cumulative Runoff in3.4Cumulative Runoff Depth (Pervious) ac-ft0.197Runoff Volume (Pervious) Hydrograph Volume (Area under Hydrograph curve) ac-ft0.196Volume SCS Unit Hydrograph Parameters hours0.083Time of Concentration (Composite) hours0.011Computational Time Increment 483.432Unit Hydrograph Shape Factor 0.749K Factor 1.670Receding/Rising, Tr/Tp Page 20 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 10 year stormLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph Summary SCS Unit Hydrograph Parameters ft³/s9.38Unit peak, qp hours0.056Unit peak time, Tp hours0.222Unit receding limb, Tr hours0.278Total unit time, Tb Page 21 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 100 year stormLabel: CM-1 Return Event: 100 yearsSubsection: Unit Hydrograph Summary 100 year stormStorm Event years100Return Event hours24.000Duration in6.5Depth hours0.083Time of Concentration (Composite) acres0.690Area (User Defined) hours0.011Computational Time Increment hours11.922Time to Peak (Computed) ft³/s5.71Flow (Peak, Computed) hours0.050Output Increment hours11.900Time to Flow (Peak Interpolated Output) ft³/s5.61Flow (Peak Interpolated Output) Drainage Area 95.000SCS CN (Composite) acres0.690Area (User Defined) in0.5Maximum Retention (Pervious) in0.1Maximum Retention (Pervious, 20 percent) Cumulative Runoff in5.9Cumulative Runoff Depth (Pervious) ac-ft0.337Runoff Volume (Pervious) Hydrograph Volume (Area under Hydrograph curve) ac-ft0.337Volume SCS Unit Hydrograph Parameters hours0.083Time of Concentration (Composite) hours0.011Computational Time Increment 483.432Unit Hydrograph Shape Factor 0.749K Factor 1.670Receding/Rising, Tr/Tp Page 22 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 100 year stormLabel: CM-1 Return Event: 100 yearsSubsection: Unit Hydrograph Summary SCS Unit Hydrograph Parameters ft³/s9.38Unit peak, qp hours0.056Unit peak time, Tp hours0.222Unit receding limb, Tr hours0.278Total unit time, Tb Page 23 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 100 year stormLabel: CM-1 Return Event: 100 yearsSubsection: Unit Hydrograph Summary 100 year stormStorm Event years100Return Event hours24.000Duration in6.5Depth hours0.083Time of Concentration (Composite) acres0.690Area (User Defined) hours0.011Computational Time Increment hours11.922Time to Peak (Computed) ft³/s5.76Flow (Peak, Computed) hours0.050Output Increment hours11.900Time to Flow (Peak Interpolated Output) ft³/s5.67Flow (Peak Interpolated Output) Drainage Area 96.435SCS CN (Composite) acres0.690Area (User Defined) in0.4Maximum Retention (Pervious) in0.1Maximum Retention (Pervious, 20 percent) Cumulative Runoff in6.0Cumulative Runoff Depth (Pervious) ac-ft0.347Runoff Volume (Pervious) Hydrograph Volume (Area under Hydrograph curve) ac-ft0.347Volume SCS Unit Hydrograph Parameters hours0.083Time of Concentration (Composite) hours0.011Computational Time Increment 483.432Unit Hydrograph Shape Factor 0.749K Factor 1.670Receding/Rising, Tr/Tp Page 24 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: 100 year stormLabel: CM-1 Return Event: 100 yearsSubsection: Unit Hydrograph Summary SCS Unit Hydrograph Parameters ft³/s9.38Unit peak, qp hours0.056Unit peak time, Tp hours0.222Unit receding limb, Tr hours0.278Total unit time, Tb Page 25 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Index Time-Depth - 1 (Time-Depth Curve, 2 years)...10, 11, 12, 13 Time-Depth - 1 (Time-Depth Curve, 100 years)...6, 7, 8, 9 Time-Depth - 1 (Time-Depth Curve, 10 years)...2, 3, 4, 5 T Master Network Summary...1 M CM-1 (Unit Hydrograph Summary, 2 years)...14, 15, 16, 17 CM-1 (Unit Hydrograph Summary, 100 years)...22, 23, 24, 25 CM-1 (Unit Hydrograph Summary, 10 years)...18, 19, 20, 21 C Page 26 of 2627 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc APPENDIX F: BMP SIZING CALCULATIONS TJPS Consulting Engineers - K:\Civil Projects\19JPSC26 Meridian Design Center\Drawings\BASIN.dwg August 17, 2019 - 2:29 PM Nvergatos BMPBASIN MAPNO SCALENBVNBVNBVBMPCONSTRUCTIONDOCUMENTS19 AUGUST 201919JPSC26BMP BASINTOTAL AREA: 0.48acIMPERVIOUS: 0.44acPERVIOUS: 0.04acNEW STRUCTURALBMP Table of Contents 6Unit Hydrograph (Hydrograph Table), 10 years 4Unit Hydrograph Summary, 10 years CM-1 2Time-Depth Curve, 10 yearsTime-Depth - 1 1Master Network Summary 12955 Old Meridian Remodel Subsection: Master Network Summary Catchments Summary Peak Flow (ft³/s) Time to Peak (hours) Hydrograph Volume (ac-ft) Return Event (years) ScenarioLabel 0.6011.9000.03510Water QualityCM-1 Node Summary Peak Flow (ft³/s) Time to Peak (hours) Hydrograph Volume (ac-ft) Return Event (years) ScenarioLabel 0.6011.9000.03510Water QualityO-1 Page 1 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: Water QualityLabel: Time-Depth - 1 Return Event: 10 yearsSubsection: Time-Depth Curve Time-Depth Curve: Water Quality Water QualityLabel hours0.000Start Time hours0.100Increment hours24.000End Time years10Return Event CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 0.00.00.00.00.00.000 0.00.00.00.00.00.500 0.00.00.00.00.01.000 0.00.00.00.00.01.500 0.00.00.00.00.02.000 0.00.00.00.00.02.500 0.00.00.00.00.03.000 0.00.00.00.00.03.500 0.10.10.10.00.04.000 0.10.10.10.10.14.500 0.10.10.10.10.15.000 0.10.10.10.10.15.500 0.10.10.10.10.16.000 0.10.10.10.10.16.500 0.10.10.10.10.17.000 0.10.10.10.10.17.500 0.10.10.10.10.18.000 0.10.10.10.10.18.500 0.20.20.20.20.19.000 0.20.20.20.20.29.500 0.20.20.20.20.210.000 0.20.20.20.20.210.500 0.30.30.30.20.211.000 0.60.40.40.30.311.500 0.70.70.70.70.712.000 0.80.80.80.70.712.500 0.80.80.80.80.813.000 0.80.80.80.80.813.500 0.80.80.80.80.814.000 0.90.80.80.80.814.500 0.90.90.90.90.915.000 0.90.90.90.90.915.500 0.90.90.90.90.916.000 0.90.90.90.90.916.500 Page 2 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: Water QualityLabel: Time-Depth - 1 Return Event: 10 yearsSubsection: Time-Depth Curve CUMULATIVE RAINFALL (in) Output Time Increment = 0.100 hours Time on left represents time for first value in each row. Depth (in) Depth (in) Depth (in) Depth (in) Depth (in) Time (hours) 0.90.90.90.90.917.000 0.90.90.90.90.917.500 0.90.90.90.90.918.000 0.90.90.90.90.918.500 0.90.90.90.90.919.000 1.00.90.90.90.919.500 1.01.01.01.01.020.000 1.01.01.01.01.020.500 1.01.01.01.01.021.000 1.01.01.01.01.021.500 1.01.01.01.01.022.000 1.01.01.01.01.022.500 1.01.01.01.01.023.000 1.01.01.01.01.023.500 (N/A)(N/A)(N/A)(N/A)1.024.000 Page 3 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: Water QualityLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph Summary Water QualityStorm Event years10Return Event hours24.000Duration in1.0Depth hours0.083Time of Concentration (Composite) acres0.480Area (User Defined) hours0.011Computational Time Increment hours11.922Time to Peak (Computed) ft³/s0.61Flow (Peak, Computed) hours0.050Output Increment hours11.900Time to Flow (Peak Interpolated Output) ft³/s0.60Flow (Peak Interpolated Output) Drainage Area 99.000SCS CN (Composite) acres0.480Area (User Defined) in0.1Maximum Retention (Pervious) in0.0Maximum Retention (Pervious, 20 percent) Cumulative Runoff in0.9Cumulative Runoff Depth (Pervious) ac-ft0.036Runoff Volume (Pervious) Hydrograph Volume (Area under Hydrograph curve) ac-ft0.035Volume SCS Unit Hydrograph Parameters hours0.083Time of Concentration (Composite) hours0.011Computational Time Increment 483.432Unit Hydrograph Shape Factor 0.749K Factor 1.670Receding/Rising, Tr/Tp Page 4 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: Water QualityLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph Summary SCS Unit Hydrograph Parameters ft³/s6.53Unit peak, qp hours0.056Unit peak time, Tp hours0.222Unit receding limb, Tr hours0.278Total unit time, Tb Page 5 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: Water QualityLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph (Hydrograph Table) Water QualityStorm Event years10Return Event hours24.000Duration in1.0Depth hours0.083Time of Concentration (Composite) acres0.480Area (User Defined) HYDROGRAPH ORDINATES (ft³/s) Output Time Increment = 0.050 hours Time on left represents time for first value in each row. Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Time (hours) 0.000.000.000.000.002.700 0.000.000.000.000.002.950 0.000.000.000.000.003.200 0.000.000.000.000.003.450 0.000.000.000.000.003.700 0.000.000.000.000.003.950 0.000.000.000.000.004.200 0.000.000.000.000.004.450 0.000.000.000.000.004.700 0.000.000.000.000.004.950 0.000.000.000.000.005.200 0.000.000.000.000.005.450 0.010.000.000.000.005.700 0.010.010.010.010.015.950 0.010.010.010.010.016.200 0.010.010.010.010.016.450 0.010.010.010.010.016.700 0.010.010.010.010.016.950 0.010.010.010.010.017.200 0.010.010.010.010.017.450 0.010.010.010.010.017.700 0.010.010.010.010.017.950 0.010.010.010.010.018.200 0.010.010.010.010.018.450 0.010.010.010.010.018.700 0.010.010.010.010.018.950 0.010.010.010.010.019.200 0.010.010.010.010.019.450 0.020.010.010.010.019.700 0.020.020.020.020.029.950 0.020.020.020.020.0210.200 0.020.020.020.020.0210.450 0.030.030.030.030.0210.700 Page 6 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: Water QualityLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph (Hydrograph Table) HYDROGRAPH ORDINATES (ft³/s) Output Time Increment = 0.050 hours Time on left represents time for first value in each row. Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Time (hours) 0.030.030.030.030.0310.950 0.050.040.040.040.0411.200 0.150.100.070.050.0511.450 0.600.460.330.260.2011.700 0.100.150.320.480.5611.950 0.060.060.070.080.0812.200 0.040.040.040.050.0512.450 0.030.030.040.040.0412.700 0.030.030.030.030.0312.950 0.020.030.030.030.0313.200 0.020.020.020.020.0213.450 0.020.020.020.020.0213.700 0.020.020.020.020.0213.950 0.020.020.020.020.0214.200 0.020.020.020.020.0214.450 0.010.020.020.020.0214.700 0.010.010.010.010.0114.950 0.010.010.010.010.0115.200 0.010.010.010.010.0115.450 0.010.010.010.010.0115.700 0.010.010.010.010.0115.950 0.010.010.010.010.0116.200 0.010.010.010.010.0116.450 0.010.010.010.010.0116.700 0.010.010.010.010.0116.950 0.010.010.010.010.0117.200 0.010.010.010.010.0117.450 0.010.010.010.010.0117.700 0.010.010.010.010.0117.950 0.010.010.010.010.0118.200 0.010.010.010.010.0118.450 0.010.010.010.010.0118.700 0.010.010.010.010.0118.950 0.010.010.010.010.0119.200 0.010.010.010.010.0119.450 0.010.010.010.010.0119.700 0.010.010.010.010.0119.950 0.010.010.010.010.0120.200 0.010.010.010.010.0120.450 0.010.010.010.010.0120.700 0.010.010.010.010.0120.950 0.010.010.010.010.0121.200 Page 7 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Storm Event: Water QualityLabel: CM-1 Return Event: 10 yearsSubsection: Unit Hydrograph (Hydrograph Table) HYDROGRAPH ORDINATES (ft³/s) Output Time Increment = 0.050 hours Time on left represents time for first value in each row. Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Flow (ft³/s) Time (hours) 0.010.010.010.010.0121.450 0.010.010.010.010.0121.700 0.010.010.010.010.0121.950 0.010.010.010.010.0122.200 0.010.010.010.010.0122.450 0.010.010.010.010.0122.700 0.010.010.010.010.0122.950 0.010.010.010.010.0123.200 0.010.010.010.010.0123.450 0.010.010.010.010.0123.700 (N/A)(N/A)(N/A)0.010.0123.950 Page 8 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc 12955 Old Meridian Remodel Index Time-Depth - 1 (Time-Depth Curve, 10 years)...2, 3 T Master Network Summary...1 M CM-1 (Unit Hydrograph Summary, 10 years)...4, 5 CM-1 (Unit Hydrograph (Hydrograph Table), 10 years)...6, 7, 8 C Page 9 of 927 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 8/17/2019 Bentley PondPack V8i [08.11.01.56] Bentley Systems, Inc. Haestad Methods Solution Center12955 Old Meridian Remodel Run-Off.ppc City of Indianapolis Stormwater Quality Unit (SQU) Selection Guide Pg. 2 01/02/19 Version 13.0 Manufactured SQU SQU System Model Max Treatment Flow (cfs) Max 10-yr On-Line Flow Rate (cfs) Cleanout Depth (Inches) 9000 7.59 N/A 30 11000 9.88 N/A 30 16000 15.59 N/A 30 PC1319 or 1319 CIP 19.04 N/A 30 PC1421 or 1421 CIP 22.92 N/A 30 1522 CIP 27.23 N/A 30 1624 CIP 32.00 N/A 30 1726 CIP 37.24 N/A 30 1827 CIP 42.96 N/A 30 1929 CIP 49.17 N/A 30 2030 CIP 55.90 N/A 30 2131 CIP 63.15 N/A 30 2233 CIP 70.94 N/A 30 2334 CIP 79.28 N/A 30 2436 CIP 88.18 N/A 30 2538 CIP 97.66 N/A 30 2639 CIP 107.72 N/A 30 2740 CIP 118.37 N/A 30 2842 CIP 129.64 N/A 30 2943 CIP 141.53 N/A 30 3045 CIP 154.05 N/A 30 3146 CIP 167.21 N/A 30 3349 CIP 195.49 N/A 30 3958 CIP 296.83 N/A 30 4060 CIP 316.23 N/A 30 Aqua-Swirl™ 2,3 AS-2 0.26 N/A 24 AS-3 0.50 N/A 32 AS-4 0.98 N/A 32 AS-5 1.47 N/A 32 AS-6 2.32 N/A 32 AS-7 3.40 N/A 32 AS-8 4.75 N/A 32 AS-9 6.38 N/A 32 AS-10 8.30 N/A 32 AS-11 10.54 N/A 32 AS-12 13.10 N/A 32 AS-13 16.00 N/A 32