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Indianapolis, IN | St. Louis, MO | .www.weihe.net | (800) 452-6408 Allan H. Weihe, P.E., L.S. - Founder STORMWATER TECHNICAL REPORT For: VILLAGE OF WEST CLAY BLOCK D PARKING EXPANSION Address: Part of Block D, Village of West Clay, South of Broughton Street, East of Broad Street, North of Horseferry Road and West of Bird Cage Walk Part of SW/4, Section 28, Township 18 North, Range 3 East, Clay Township Carmel, Hamilton County, Indiana Project #W210436 Prepared For: Mr. David Klain DB Klain Construction 2159 Glebe Street, Suite 200 Carmel, Indiana 46032 Office: 317-846-9992 Cell: 317-714-4580 Prepared By: Russell L. Webster II, P.E. Checked By: Mark Thorpe, RLA Certified By: Russell L. Webster II, P.E. Date: March 14, 2022 Revised: May 12, 2022 I AFFIRM, UNDER THE PENALTIES FOR PERJURY, THAT I HAVE TAKEN REASONABLE CARE TO REDACT EACH SOCIAL SECURITY NUMBER IN THIS DOCUMENT, UNLESS REQUIRED BY LAW. – Russell L. Webster II THIS INSTRUMENT PREPARED BY: Russell L. Webster II Page 1 of 56 05/11/2022 PROFESSIONAL CERTIFICATION THIS INSTRUMENT PREPARED BY: Russell L. Webster II, PE Page 2 of 56 05/11/2022 07/09/2021 Dimond Bros. Insurance, LLC 11708 North College Avenue Carmel IN 46032 Laurie Kay (317) 853-3572 (317) 853-3501 laurie.kay@dimondbros.com Weihe Engineers, Inc. 10505 North College Avenue Indianapolis IN 46280 Continental Casualty Company 20443 21-22 Prof/Poll Master A Professional Liability Pollution Incident Liability AEH591931393 07/03/2021 07/03/2022 Limit of Liability $2,000,000 Aggregate Limit $2,000,000 Deductible $25,000 Sample SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED BEFORE THE EXPIRATION DATE THEREOF, NOTICE WILL BE DELIVERED IN ACCORDANCE WITH THE POLICY PROVISIONS. INSURER(S) AFFORDING COVERAGE INSURER F : INSURER E : INSURER D : INSURER C : INSURER B : INSURER A : NAIC # NAME: CONTACT (A/C, No): FAX E-MAIL ADDRESS: PRODUCER (A/C, No, Ext): PHONE INSURED REVISION NUMBER:CERTIFICATE NUMBER:COVERAGES IMPORTANT: If the certificate holder is an ADDITIONAL INSURED, the policy(ies) must have ADDITIONAL INSURED provisions or be endorsed. If SUBROGATION IS WAIVED, subject to the terms and conditions of the policy, certain policies may require an endorsement. A statement on this certificate does not confer rights to the certificate holder in lieu of such endorsement(s). THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE HOLDER. THIS CERTIFICATE DOES NOT AFFIRMATIVELY OR NEGATIVELY AMEND, EXTEND OR ALTER THE COVERAGE AFFORDED BY THE POLICIES BELOW. THIS CERTIFICATE OF INSURANCE DOES NOT CONSTITUTE A CONTRACT BETWEEN THE ISSUING INSURER(S), AUTHORIZED REPRESENTATIVE OR PRODUCER, AND THE CERTIFICATE HOLDER. OTHER: (Per accident) (Ea accident) $ $ N / A SUBR WVD ADDL INSD THIS IS TO CERTIFY THAT THE POLICIES OF INSURANCE LISTED BELOW HAVE BEEN ISSUED TO THE INSURED NAMED ABOVE FOR THE POLICY PERIOD INDICATED. NOTWITHSTANDING ANY REQUIREMENT, TERM OR CONDITION OF ANY CONTRACT OR OTHER DOCUMENT WITH RESPECT TO WHICH THIS CERTIFICATE MAY BE ISSUED OR MAY PERTAIN, THE INSURANCE AFFORDED BY THE POLICIES DESCRIBED HEREIN IS SUBJECT TO ALL THE TERMS, EXCLUSIONS AND CONDITIONS OF SUCH POLICIES. LIMITS SHOWN MAY HAVE BEEN REDUCED BY PAID CLAIMS. $ $ $ $PROPERTY DAMAGE BODILY INJURY (Per accident) BODILY INJURY (Per person) COMBINED SINGLE LIMIT AUTOS ONLY AUTOSAUTOS ONLY NON-OWNED SCHEDULEDOWNED ANY AUTO AUTOMOBILE LIABILITY Y / N WORKERS COMPENSATION AND EMPLOYERS' LIABILITY OFFICER/MEMBER EXCLUDED? (Mandatory in NH) DESCRIPTION OF OPERATIONS below If yes, describe under ANY PROPRIETOR/PARTNER/EXECUTIVE $ $ $ E.L. DISEASE - POLICY LIMIT E.L. DISEASE - EA EMPLOYEE E.L. EACH ACCIDENT ER OTH- STATUTE PER LIMITS(MM/DD/YYYY) POLICY EXP (MM/DD/YYYY) POLICY EFF POLICY NUMBERTYPE OF INSURANCELTR INSR DESCRIPTION OF OPERATIONS / LOCATIONS / VEHICLES (ACORD 101, Additional Remarks Schedule, may be attached if more space is required) EXCESS LIAB UMBRELLA LIAB $EACH OCCURRENCE $AGGREGATE $ OCCUR CLAIMS-MADE DED RETENTION $ $PRODUCTS - COMP/OP AGG $GENERAL AGGREGATE $PERSONAL & ADV INJURY $MED EXP (Any one person) $EACH OCCURRENCE DAMAGE TO RENTED $PREMISES (Ea occurrence) COMMERCIAL GENERAL LIABILITY CLAIMS-MADE OCCUR GEN'L AGGREGATE LIMIT APPLIES PER: POLICY PRO- JECT LOC CERTIFICATE OF LIABILITY INSURANCE DATE (MM/DD/YYYY) CANCELLATION AUTHORIZED REPRESENTATIVE ACORD 25 (2016/03) © 1988-2015 ACORD CORPORATION. All rights reserved. CERTIFICATE HOLDER The ACORD name and logo are registered marks of ACORD HIRED AUTOS ONLY Page 3 of 56 05/11/2022 Weihe Engineers, Inc.Insured Multiple Names Additional Named Insureds Other Named Insureds OFAPPINF (02/2007)COPYRIGHT 2007, AMS SERVICES INC Page 4 of 56 05/11/2022 Project #W210436 TABLE OF CONTENTS 1. Project Narrative • Project Description • Existing Conditions • Proposed Conditions • Location Maps • Soil Map • FIRM Map Clipping 2. Existing Conditions Survey • Sub-Basin Map • Supporting Calculations 3. Storm Sewer Analysis • Sub-Basin Map • Supporting Calculations • Storm Sewer Calculations 4. Appendix – 2013 Village Center Townhomes Report Page 5 of 56 05/11/2022 SECTION 1: PROJECT NARRATIVE AND SUMMARY Page 6 of 56 05/11/2022 W210436 Drainage Report Weihe Engineers, INC. 5/11/2022 Prepared For: Stormwater Technical Report Village of West Clay Block D Parking Lot Expansion Carmel, IN Project w210436 Project Narrative: DB Klain Construction is proposing to expand an existing parking area, based on executing a master plan for the Village of West Clay. This expansion consists of several new and small parking areas, which were planned in the 2013 report, and some new driveway connections. The parking area has been modified slightly from the master plan to accommodate site conditions. This report builds off a 2013 drainage report for Village Center Townhomes, which describes the buildout of this parking area, the two BMPs which are in series that treat this area, and the downstream drainage report. The site is served by a Storm Trap water quality unit for water quality, and a wet pond for secondary stormwater quality treatment and detention. Therefore, no new detention or post construction stormwater quality measures will be required. The purpose of this report is to analyze the modifications to the existing storm sewer to ensure proper function. Summary of Required Permits: IDEM General Construction Permit, City of Carmel Engineering, MS4 Location: Part of Block D, Village of West Clay, South of Broughton Street, East of Broad Street, North of Horseferry Road and West of Bird Cage Walk Part of SW/4, Section 28, Township 18 North, Range 3 East, Clay Township Carmel, Hamilton County, Indiana Flood Zone: The site does not lie in a Special Flood Hazard Area as established by the Federal Emergency Management Agency - National Flood Insurance Program, when plotted by scale on Flood Insurance Rate Map 18057C0205G, effective on 11/19/2014. Assumptions: It has been assumed that around half of the roof drains for the surrounding buildings contribute to the drainage areas of this expanded parking area. The apartments to the east are peaked and it can be reasonably assumed that they are split at their peak to either the parking area or the surrounding roads. The commercial buildings to the west and north are in some cases peaked, and other cases flat roofed. We have used the 2013 existing drainage report to make assumptions about the roof drains to the west which contributes minimally to the existing interior storm sewer. All of this is demonstrated in the calculations and basin map in Section 3 of this report. Our survey did not pick up an invert on the existing storm sewer constituted as line 302 – 204 in the storm sewer analysis. This storm sewer has been assumed to be at 0.50% slope. It may be required to field verify this slope prior to approval or construction. Page 7 of 56 05/11/2022 W210436 Drainage Report Weihe Engineers, INC. 5/11/2022 Pre-Developed Conditions: In the existing condition, the site is mixed use between residential and commercial. The runoff from this site flows generally southeast through existing storm sewers. There are 6 existing basins on the site. The basins are very similar to their full build-out condition which was described in the 2013 Village Center Townhomes Report. The soil types were determined using the Web Soil Survey and a soils report is included in this report in Section 1. Refer to Section 2 for the existing conditions map and survey. Refer to Section 4 - Appendix for the 2013 Village Center Townhomes Report for the previously approved drainage report. Pre-Developed 10-year Flow Rate = 5.21 cfs Analysis Procedure: The pipes were analyzed using the Rational Method, with rainfall intensities, runoff coefficients and other supporting data provided by the City of Carmel Stormwater Manual. The runoff coefficients, times of concentration, figures, and storm sewer design information are included in Section 3 of this report. Post-Developed Conditions: To accommodate the proposed parking area, some modifications will be made to the existing storm sewer. Three new storm structures will be installed, two box inlets and one manhole These will allow cleaner grading overall in the parking area. The modified storm sewers were analyzed using the Rational Method for the 10-year return period. Times of concentration were calculated using the TR-55 method, and runoff coefficients were calculated via composite using inputs from the City of Carmel Stormwater manual. Grate capacity calculations were performed to determine capacity of the inlets at 50% clogged, all existing and proposed inlets function properly under those conditions. Refer to Section 3 of this report for more information. Release Rate Summary: 10-year = 8.42 cfs, calculated capacity is 10.15 cfs. Coverage Comparison: 2013 Report C value = 0.80. This appears to have been an assumed value, and it was also used in the 1999 mater plan report. (2013 report pages not numbered, page titled: STORM SEWER DESIGN CALCULATIONS RATIONAL METHOD) Current C value = (a*C)/Total Area = 1.74/2.57 = 0.68. Less than the master plan value of 0.80. Evaluation Downstream Receiving System: The receiving system of the site is an existing 18” RCP storm sewer. The proposed 10-year flow rate is lower than the capacity of the storm sewer and should have no adverse effect on the downstream drainage systems. Page 8 of 56 05/11/2022 W210436 Drainage Report Weihe Engineers, INC. 5/11/2022 Storm Sewers: The proposed storm sewers have been analyzed to accommodate the 10-year proposed runoff rates. The storm sewers have been analyzed to accommodate a minimum velocity of 2.5 fps for the purposes of conveyance. The hydraulics grade line will be kept below the castings during 10-year events. Water Quality: This site is served by a downstream Storm Trap Water Quality unit and an existing wet pond, which appears to be in good condition. The Village Center report used a hard surface percentage of 85%, our calculations show the 2.5 acres covered by this analysis is around 73%. The curve number used for the water quality unit was 98.2 according to the 2013 report, so none of the proposed improvements will have any negative effect on the existing water quality features. Page 9 of 56 05/11/2022 LOCATION MAP – NO SCALE DENOTES PROJECT LOCATION Page 10 of 56 05/11/2022 United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Hamilton County, IndianaNatural Resources Conservation Service March 10, 2022 Page 11 of 56 05/11/2022 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/? cid=nrcs142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 Page 12 of 56 05/11/2022 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Page 13 of 56 05/11/2022 Contents Preface....................................................................................................................2 Soil Map..................................................................................................................5 Soil Map................................................................................................................6 Legend..................................................................................................................7 Map Unit Legend..................................................................................................8 Map Unit Descriptions..........................................................................................8 Hamilton County, Indiana................................................................................10 YbvA—Brookston silty clay loam-Urban land complex, 0 to 2 percent slopes....................................................................................................10 YclA—Crosby silt loam, fine-loamy subsoil-Urban land complex, 0 to 2 percent slopes.......................................................................................11 Soil Information for All Uses...............................................................................13 Soil Properties and Qualities..............................................................................13 Soil Qualities and Features.............................................................................13 Hydrologic Soil Group.................................................................................13 4 Page 14 of 56 05/11/2022 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 5 Page 15 of 56 05/11/2022 6 Custom Soil Resource Report Soil Map 44250404425060442508044251004425120442514044251604425180442520044250604425080442510044251204425140442516044251804425200568510 568530 568550 568570 568590 568610 568630 568650 568670 568690 568710 568730 568750 568510 568530 568550 568570 568590 568610 568630 568650 568670 568690 568710 568730 568750 39° 58' 27'' N 86° 11' 51'' W39° 58' 27'' N86° 11' 41'' W39° 58' 21'' N 86° 11' 51'' W39° 58' 21'' N 86° 11' 41'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84 0 50 100 200 300 Feet 0 15 30 60 90 Meters Map Scale: 1:1,160 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale.Page 16 of 56 05/11/2022 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 22, Sep 9, 2021 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 7Page 17 of 56 05/11/2022 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI YbvA Brookston silty clay loam-Urban land complex, 0 to 2 percent slopes 2.4 51.4% YclA Crosby silt loam, fine-loamy subsoil-Urban land complex, 0 to 2 percent slopes 2.3 48.6% Totals for Area of Interest 4.7 100.0% Map Unit Descriptions 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 particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The Custom Soil Resource Report 8 Page 18 of 56 05/11/2022 delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 9 Page 19 of 56 05/11/2022 Hamilton County, Indiana YbvA—Brookston silty clay loam-Urban land complex, 0 to 2 percent slopes Map Unit Setting National map unit symbol: 2w57n Elevation: 600 to 1,260 feet Mean annual precipitation: 37 to 46 inches Mean annual air temperature: 48 to 55 degrees F Frost-free period: 145 to 180 days Farmland classification: Not prime farmland Map Unit Composition Brookston and similar soils:65 percent Urban land:30 percent Minor components:5 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Brookston Setting Landform:Till plains, depressions Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Dip Down-slope shape:Linear, concave Across-slope shape:Concave Parent material:Loess over loamy till Typical profile Ap - 0 to 16 inches: silty clay loam Btg1 - 16 to 32 inches: silty clay loam Btg2 - 32 to 44 inches: loam C - 44 to 60 inches: loam Properties and qualities Slope:0 to 2 percent Depth to restrictive feature:More than 80 inches Drainage class:Poorly drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):Moderately high (0.20 to 0.60 in/hr) Depth to water table:About 0 to 12 inches Frequency of flooding:None Frequency of ponding:Frequent Calcium carbonate, maximum content:40 percent Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 8.9 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2w Hydrologic Soil Group: B/D Ecological site: F111AY007IN - Till Depression Flatwood Hydric soil rating: Yes Custom Soil Resource Report 10 Page 20 of 56 05/11/2022 Minor Components Crosby Percent of map unit:5 percent Landform:Till plains Landform position (two-dimensional):Summit, footslope Landform position (three-dimensional):Talf Down-slope shape:Concave Across-slope shape:Linear Ecological site:F111AY008IN - Wet Till Ridge Hydric soil rating: No YclA—Crosby silt loam, fine-loamy subsoil-Urban land complex, 0 to 2 percent slopes Map Unit Setting National map unit symbol: 2w57p Elevation: 600 to 1,040 feet Mean annual precipitation: 36 to 46 inches Mean annual air temperature: 48 to 55 degrees F Frost-free period: 145 to 180 days Farmland classification: Not prime farmland Map Unit Composition Crosby and similar soils:60 percent Urban land:30 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Crosby Setting Landform:Recessionial moraines, ground moraines, water-lain moraines Landform position (two-dimensional):Summit, backslope, footslope Landform position (three-dimensional):Interfluve, rise Down-slope shape:Convex, linear Across-slope shape:Linear, convex Parent material:Silty material or loess over loamy till Typical profile Ap - 0 to 10 inches: silt loam Btg - 10 to 17 inches: silty clay loam 2Bt - 17 to 29 inches: clay loam 2BCt - 29 to 36 inches: loam 2Cd - 36 to 79 inches: loam Properties and qualities Slope:0 to 2 percent Depth to restrictive feature:24 to 40 inches to densic material Drainage class:Somewhat poorly drained Custom Soil Resource Report 11 Page 21 of 56 05/11/2022 Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat):Low to moderately high (0.01 to 0.20 in/hr) Depth to water table:About 6 to 24 inches Frequency of flooding:None Frequency of ponding:None Calcium carbonate, maximum content:55 percent Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.5 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2w Hydrologic Soil Group: C/D Ecological site: F111AY008IN - Wet Till Ridge Hydric soil rating: No Minor Components Williamstown, eroded Percent of map unit:5 percent Landform:Recessionial moraines, ground moraines, water-lain moraines Landform position (two-dimensional):Summit, shoulder, backslope Landform position (three-dimensional):Head slope, nose slope, side slope, crest, rise Down-slope shape:Linear, convex Across-slope shape:Convex, linear Ecological site:F111AY009IN - Till Ridge Hydric soil rating: No Treaty, drained Percent of map unit:5 percent Landform:Swales, water-lain moraines, depressions Landform position (two-dimensional):Footslope, toeslope Landform position (three-dimensional):Base slope, dip Down-slope shape:Linear Across-slope shape:Concave Ecological site:F111AY007IN - Till Depression Flatwood Hydric soil rating: Yes Custom Soil Resource Report 12 Page 22 of 56 05/11/2022 Soil Information for All Uses Soil Properties and Qualities The Soil Properties and Qualities section includes various soil properties and qualities displayed as thematic maps with a summary table for the soil map units in the selected area of interest. A single value or rating for each map unit is generated by aggregating the interpretive ratings of individual map unit components. This aggregation process is defined for each property or quality. Soil Qualities and Features Soil qualities are behavior and performance attributes that are not directly measured, but are inferred from observations of dynamic conditions and from soil properties. Example soil qualities include natural drainage, and frost action. Soil features are attributes that are not directly part of the soil. Example soil features include slope and depth to restrictive layer. These features can greatly impact the use and management of the soil. Hydrologic Soil Group Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. 13 Page 23 of 56 05/11/2022 Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Custom Soil Resource Report 14 Page 24 of 56 05/11/2022 15 Custom Soil Resource Report Map—Hydrologic Soil Group 44250404425060442508044251004425120442514044251604425180442520044250604425080442510044251204425140442516044251804425200568510 568530 568550 568570 568590 568610 568630 568650 568670 568690 568710 568730 568750 568510 568530 568550 568570 568590 568610 568630 568650 568670 568690 568710 568730 568750 39° 58' 27'' N 86° 11' 51'' W39° 58' 27'' N86° 11' 41'' W39° 58' 21'' N 86° 11' 51'' W39° 58' 21'' N 86° 11' 41'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84 0 50 100 200 300 Feet 0 15 30 60 90 Meters Map Scale: 1:1,160 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale.Page 25 of 56 05/11/2022 MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available 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 22, Sep 9, 2021 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 16Page 26 of 56 05/11/2022 Table—Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI YbvA Brookston silty clay loam-Urban land complex, 0 to 2 percent slopes B/D 2.4 51.4% YclA Crosby silt loam, fine- loamy subsoil-Urban land complex, 0 to 2 percent slopes C/D 2.3 48.6% Totals for Area of Interest 4.7 100.0% Rating Options—Hydrologic Soil Group Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Custom Soil Resource Report 17 Page 27 of 56 05/11/2022 National Flood Hazard Layer FIRMette 0 500 1,000 1,500 2,000250 Feet Ü SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT SPECIAL FLOOD HAZARD AREAS Without Base Flood Elevation (BFE) Zone A, V, A99 With BFE or DepthZone AE, AO, AH, VE, AR Regulatory Floodway 0.2% Annual Chance Flood Hazard, Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mileZone X Future Conditions 1% Annual Chance Flood HazardZone X Area with Reduced Flood Risk due to Levee. See Notes.Zone X Area with Flood Risk due to LeveeZone D NO SCREEN Area of Minimal Flood Hazard Zone X Area of Undetermined Flood HazardZone D Channel, Culvert, or Storm Sewer Levee, Dike, or Floodwall Cross Sections with 1% Annual Chance 17.5 Water Surface Elevation Coastal Transect Coastal Transect Baseline Profile Baseline Hydrographic Feature Base Flood Elevation Line (BFE) Effective LOMRs Limit of Study Jurisdiction Boundary 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 the authoritative NFHL web services provided by FEMA. This map was exported on 3/8/2022 at 2:26 PM and does not reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or become superseded by new data over time. This map image is void if the one or more of the following map elements 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 for unmapped and unmodernized areas cannot be used for regulatory purposes. Legend OTHER AREAS OF FLOOD HAZARD OTHER AREAS GENERAL STRUCTURES OTHER FEATURES MAP PANELS 8 B 20.2 The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. 1:6,000 86°12'7"W 39°58'38"N 86°11'29"W 39°58'10"N Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020Page 28 of 56 05/11/2022 SECTION 2: EXISTING CONDITIONS Page 29 of 56 05/11/2022 BROAD STREETBIRD CAGE WALKEA S T N EW MA RK E T S T R E E T E E E E E E E E EE E E E E E REMNANT PARCEL BASIN EX301 0.83 ACRES BASIN EX204 0.23 ACRES BASIN EX203 0.27 ACRES BASIN EX202 0.42 ACRES BASIN EX201 0.48 ACRES BASIN EX205 0.30 ACRES STORM SEWER BASIN MAP EXISTING Date: March 15, 2022 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S W S N E Page 30 of 56 05/11/2022 Project:Block D Parking Date:March 8, 2022 Job No:w210436 Checked By: Prepared By:RLW BASIN: EX301 Area (SF) Area (Ac.) C 11002 0.25 0.85 3777 0.09 0.90 21588 0.50 0.20 36367 0.83 0.47 BASIN: EX204 Area (SF) Area (Ac.) C 6912 0.16 0.85 1480 0.03 0.90 1500 0.03 0.20 9892 0.23 0.76 BASIN: EX203 Area (SF) Area (Ac.) C 15815 0.36 0.85 0 0.00 0.90 4231 0.10 0.20 20046 0.46 0.71 BASIN: EX202 Area (SF) Area (Ac.) C 5631 0.13 0.85 0 0.00 0.90 12650 0.29 0.20 18281 0.42 0.40 BASIN: EX201 Area (SF) Area (Ac.) C 8341 0.19 0.85 4104 0.09 0.90 8681 0.20 0.20 21126 0.48 0.59 BASIN: EX205 Area (SF) Area (Ac.) C 4952 0.11 0.85 3797 0.09 0.90 4297 0.10 0.20 13046 0.30 0.65 Cover type Pre Developed Runoff Calculations Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Impervious, Roof Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Cover type Impervious, Pavement TOTAL= Pervious, Grass TOTAL= Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Cover type Impervious, Pavement Impervious, Roof Pervious, Grass Page 31 of 56 05/11/2022 Project: Date: Job No: Checked By: Prepared By: Basin Sheet Flow Manual (L/V) Description n = L = P2 = s = Tt = .007(nL)0.8/(P2 0.5s0.4) Description V = L = Tt = L/V Tc (total)Tc (total) (ft) (in/hr) (ft/ft) (hrs) (ft/s) (ft) (hrs) (hrs)(min) EX301 Grass 0.24 88 2.66 0.032 0.1951 Swale 2 125 0.0174 0.2125 12.8 EX204 Grass 0.24 10 2.66 0.01 0.0546 Gutter / Swale 2 120 0.0167 0.0712 5.0 EX203 Grass 0.24 107 2.66 0.025 0.2519 Gutter / Swale 2 0 0.0000 0.2519 15.1 EX202 Grass 0.24 141 2.66 0.016 0.3755 Gutter / Swale 2 0 0.0000 0.3755 22.5 EX201 Grass 0.24 114 2.66 0.016 0.3167 Gutter / Swale 2 40 0.0056 0.3223 19.3 EX205 Grass 0.24 41 2.66 0.01 0.1687 Gutter / Swale 2 180 0.0250 0.1937 11.6 RLW Time of Concentration Calculations Block D Parking March 14, 2022 w210436 Page 32 of 56 05/11/2022 Page 33 of 56 05/11/2022 Page 34 of 56 05/11/2022 Page 35 of 56 05/11/2022 Page 36 of 56 05/11/2022 Page 37 of 56 05/11/2022 Page 38 of 56 05/11/2022 BROAD STREET BIRD CAGE WALKHORSEFERRY ROADEAST NEW MARKET STREETEEEEEEEEEEEEEEEEEEEEEEBROUGHTON STREETTBM #1GGGGGGGGGCCCCCCC CCCCCCCWWWWWCCC N89°51'51"E 49.78'S00°08'09"E 84.50'N89°51'51"E 101.00'S00°08'09"E5.25'N89°51'51"E147.18'S00°08'09"E 244.23'N89°51'51"E 147.99'S00°08'09"E 32.02'S89°51'51"W 125.83'N00°08'09"W1.34'S89°51'51"W 77.00'S00°08'09"E 76.84'S89°51'51"W 27.29'N00°08'09"W 73.59'N45°08'12"W 11.45'S89°51'51"W 41.54'R-50.00Δ-46°56'34"L-40.97'T-21.71'CH-39.83'CH BRG-N66°39'52"WN43°11'35"W16.24'N00°08'09"W 18.17'S89°51'51"W 18.50'N00°08'09"W82.71'S89°51'51"W80.83'N00°08'09"W 113.20'S89°51'51"W30.08'N00°08'09"W 55.00'N89°51'51"E10.84'N00°08'09"W 63.00'REMNANT PARCEL17S44°54'05"W 83.92'S45°08'09"E37.06'N89°51'51"E47.99'N00°08'09"W 81.88'15.32'19S89°51'51"W 89.08'S00°08'09"E 100.50'S59°51'51"W12.70'S00°08'09"E21.96'S45°08'09"E 59.73'N44°51'51"E 81.81' REVISIONS AND ISSUES w180192PREPARED FOR:PROJECT NO.SHEET NO.CHECKED BY: DRAWN BY: SMR FIELD BY: DWG NAME: PROJECT NO.: W180192 DATE BY DEC. 4, 2018 NH DATE: Revised to drop Parcel 20 expand remnant parcel 12/4/2018 NHH JD PART OF BLOCK "D", VILLAGE OF WEST CLAY, CLAY TOWNSHIP, HAMILTON COUNTY, INDIANA. D.B. KLAIN CONSTRUCTION, LLC HORSEFERRY ROAD & EAST NEW MARKET STREET, CARMEL, IN 46032 ALTA/NSPS LAND TITLE SURVEY WITH TOPOGRAPHYOF21 BRASS OR ALUM. PLUG FOUND/SETHARRISON MONUMENT FOUNDREBAR FOUNDPK OR MAG NAIL FOUNDTEMPORARY BENCH MARKELECTRICAL HANDHOLEELECTRIC JUNCTION BOXELECTRIC OUTLETTRANSFORMERCOMMUNICATIONS JUNCTION BOXCOMMUNICATIONS PEDESTALCONIFEROUS TREEUNDERGROUND ELECTRICBOARD FENCEBOUNDARY LINEFLOW LINEFIRE HYDRANTPOST INDICATOR VALVESPIGOTWATER METERGAS METERGAS VALVEELECTRIC METERTRASH RECEPTACLEBOLLARDMAIL BOXSIGNDOWN SPOUTACCESSIBLE SPACEGATE POSTDECIDUOUS TREECOMMUNICATIONS HANDHOLECURB INLETSQUARE INLETSTORM MANHOLESANITARY SEWER MANHOLEEEEREINFORCED CONCRETE PIPEPOLYVINYL CHLORIDE PIPERCPPVCSECTION LINEINDEX CONTOURINTERMEDIATE CONTOURSANITARY SEWERSTORM SEWERFFETCFINISH FLOOR ELEVATIONTOP OF CURBINVINVERT5/8" Ø REBAR WITH YELLOWPLASTIC CAP STAMPED"WEIHE ENGR. 0012" SETMAG NAIL WITH WASHERSTAMPED "WEIHE ENGR. 0012" SETSPOT ELEVATIONWSNEVICINITY MAPNOT TO SCALE- PROJECT LOCATIONLEGENDLINE TYPESASPHALTCONCRETEBRICKHATCH PATTERNSSITE TBMNORTHEAST BONNET NUT FIRE HYDRANTLOCATED IN THE NORTHWEST PARKING LOTISLAND. OPPOSITE NORTHEAST CORNER OFNEW MARKET HG LLC BUILDING.ELEV. 899.605 (NAVD 88)THE HORIZONTAL AND VERTICAL LOCATION DATA SHOWN ON THISSURVEY ARE BASED UPON POSITIONAL SOLUTIONS DERIVED FROMREAL-TIME KINEMATIC (RTK) GLOBAL POSITIONING SYSTEM (GPS)OBSERVATIONS PROCESSED BY THE INDIANA DEPARTMENT OFTRANSPORTATION (INDOT) CONTINUOUSLY OPERATING REFERENCESTATIONS (CORS) (HTTP://INCORS.IN.GOV). THE BEARINGS SHOWNARE DERIVED FROM COORDINATES BASED ON THE INDIANA STATEPLANE COORDINATE SYSTEM (EAST ZONE) NAD 83 (2011) EPOCH2010.0). THE VERTICAL DATUM IS BASED UPON NAVD 88.ENGINEERS 317 | 846 - 6611 800 | 452 - 6408 317 | 843 - 0546 fax WEIHE Land Surveying | Civil Engineering Landscape Architecture ALLAN H. WEIHE, P.E., L.S. - FOUNDER 10505 N. College Avenue Indianapolis, Indiana 46280 weihe.net Build with confidence.SMKnow what'sbelow.before you dig.CallR© 2017 WEIHE ENGINEERS, INC.LIGHT BASECABLE PEDESTALGENERAL NOTESTHIS DRAWING IS NOT INTENDED TO BE REPRESENTED AS A RETRACEMENT OR ORIGINALBOUNDARY SURVEY, A ROUTE SURVEY, OR A SURVEYOR LOCATION REPORT.THE LOCATIONS OF ALL EXISTING UNDERGROUND UTILITIES SHOWN ON THIS SURVEY ARE BASEDUPON ABOVE GROUND EVIDENCE (INCLUDING, BUT NOT LIMITED TO, MANHOLES, INLETS, VALVES,AND/OR MARKS MADE UPON THE GROUND BY OTHER) AND ARE SPECULATIVE IN NATURE. THEREMAY ALSO BE OTHER EXISTING UNDERGROUND UTILITIES FOR WHICH THERE IS NO ABOVEGROUND EVIDENCE OR FOR WHICH NO ABOVE GROUND EVIDENCE WAS OBSERVED. THE EXACTLOCATIONS OF SAID EXISTING UNDERGROUND UTILITIES SHALL BE VERIFIED BY THECONTRACTOR PRIOR TO ANY AND ALL CONSTRUCTION OF PLANNED IMPROVEMENTS ON ORNEAR THE PROPERTY.THE ACCURACY OF THE FLOOD HAZARD DATA SHOWN ON THIS REPORT IS SUBJECT TO MAPSCALE UNCERTAINTY AND TO ANY OTHER UNCERTAINTY IN LOCATION OR ELEVATION ON THEREFERENCED FLOOD INSURANCE RATE MAP. ACCORDING TO THE FEDERAL EMERGENCYMANAGEMENT AGENCY FLOOD INSURANCE RATE MAP OF HAMILTON COUNTY, INDIANA, MAP#18057C0205G DATED NOVEMBER 19, 2014, THE DESCRIBED REAL ESTATE LIES WITHIN THEUNSHADED ZONE "X," WHICH ARE AREAS DETERMINED TO BE OUTSIDE 500-YEAR FLOODPLAIN.W180192sv ALTAPage 39 of 56 05/11/2022 SECTION 3: PROPOSED CONDITIONS Page 40 of 56 05/11/2022 BROAD STREETBIRD CAGE WALKEA S T N EW MA RK E T S T R E E T E E E E E E E E EE E E E E E EMERICK ORTHODONTICS STM STM INTERCEPT EXISTING DRAIN INSTALL CLEANOUT INV=894.7±CONNECT 6" HPDE INV=893.70 92' OF 6" HPDE @ 1.0% MIN. BASIN 301 0.60 ACRES C = 0.66 TC = 11 min. BASIN 303 0.18 ACRES C = 0.75 TC = 5 min. BASIN 204 0.24 ACRES C = 0.75 TC = 5 min. BASIN 203 0.35 ACRES C = 0.79 TC = 5 min. BASIN 202 0.42 ACRES C = 0.46 TC = 12.5 min. BASIN 201 0.48 ACRES C = 0.73 TC = 7.4 min. BASIN 205 0.30 ACRES C = 0.70 TC = 11.8 min. STORM SEWER BASIN MAP PROPOSED Date: March 8, 2022 WEIHE weihe.net Indianapolis, Indiana 46280 10505 N. College Avenue 317 | 846 - 6611E N G I N E E R S W S N E Page 41 of 56 05/11/2022 Project:Block D Parking Date:March 8, 2022 Job No:w210436 Checked By: Prepared By:RLW BASIN: 301 Area (SF) Area (Ac.) C 14338 0.33 0.85 3777 0.09 0.90 7885 0.18 0.20 26000 0.60 0.66 BASIN: 303 Area (SF) Area (Ac.) C 5640 0.13 0.85 1000 0.02 0.90 1280 0.03 0.20 7920 0.18 0.75 BASIN: 204 Area (SF) Area (Ac.) C 7179 0.16 0.85 1600 0.04 0.90 1721 0.04 0.20 10500 0.24 0.75 BASIN: 203 Area (SF) Area (Ac.) C 13938 0.32 0.85 0 0.00 0.90 1300 0.03 0.20 15238 0.35 0.79 BASIN: 202 Area (SF) Area (Ac.) C 7393 0.17 0.85 0 0.00 0.90 10888 0.25 0.20 18281 0.42 0.46 BASIN: 201 Area (SF) Area (Ac.) C 12601 0.29 0.85 4104 0.09 0.90 4090 0.09 0.20 20795 0.48 0.73 BASIN: 205 Area (SF) Area (Ac.) C 5141 0.12 0.85 4605 0.11 0.90 3300 0.08 0.20 13046 0.30 0.70 Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= Post Developed Runoff Calculations Cover type Impervious, Pavement Impervious, Roof Pervious, Grass TOTAL= TOTAL= Pervious, Grass Impervious, Pavement Impervious, Roof Cover type Page 42 of 56 05/11/2022 Project: Date: Job No: Checked By: Prepared By: Basin Sheet Flow Manual (L/V) Description n = L = P2 = s = Tt = .007(nL)0.8/(P2 0.5s0.4) Description V = L = Tt = L/V Tc (total)Tc (total) (ft) (in/hr) (ft/ft) (hrs) (ft/s) (ft) (hrs) (hrs)(min) 301 Grass 0.24 41 2.66 0.01 0.1687 Swale 2 100 0.0139 0.1826 11.0 205 Grass 0.24 42 2.66 0.01 0.1720 Gutter / Swale 2 178 0.0247 0.1967 11.8 202 Grass 0.24 70 2.66 0.02 0.1961 Gutter / Swale 2 49 0.0068 0.2029 12.2 201 Grass 0.24 39 2.66 0.02 0.1228 Gutter / Swale 2 0 0.0000 0.1228 7.4 All other basins have no extended open spaces, so all other times of concentration are assumed to be 5 min. Time of Concentration Calculations Block D Parking March 14, 2022 w210436 RLW Page 43 of 56 05/11/2022 Page 44 of 56 05/11/2022 Page 45 of 56 05/11/2022 Page 46 of 56 05/11/2022 Page 47 of 56 05/11/2022 Page 48 of 56 05/11/2022 Page 49 of 56 05/11/2022 Page 50 of 56 05/11/2022 Page 51 of 56 05/11/2022 Sq Feet Total Hard Surface 81316 Total Open Space 30464 Total Land 111780 Acres Total Hard Surface 1.87 Total Open Space 0.70 Total Land 2.57 % Hard Surface 72.75% % Open Space 27.25% Page 52 of 56 05/11/2022 Project:Block D Parking Date:March 9, 2022 Job No:w210436 Checked By: Prepared By:RLW Area (ft2)Perimeter (ft) Neenah R-3403-F 1.60 5.30 Neenah R-4342 1.00 3.00 Neenah R-4343 1.20 4.10 Neenah R-3405 0.75 3.95 *Calculations are shown fo a 50% clogged condition per ordinance i Inlet # Q (cfs) Type of Casting Perimeter h Above inlet Flow Allowable Inlet Type 6.12 201 2.14 Neenah R-3405 3.95 0.33 2.50 Existing 4.55 202 0.88 Neenah R-3405 3.95 0.50 4.61 Existing 6.12 203 1.69 Neenah R-3405 3.95 0.50 4.61 Existing 6.12 204 1.32 Neenah R-3405 3.95 0.50 4.61 Existing 5.22 205 1.30 Neenah R-3405 3.95 0.50 4.61 Existing 5.22 301 2.34 Neenah R-4343 3.00 0.50 3.50 Single 6.12 303 1.29 Neenah R-3405 3.95 0.50 4.61 Single 50% Clogged Grate Capacity Calculations Type of Casting Gravel Area Bee Hive Bee Hive Square Inlet Page 53 of 56 05/11/2022 Hydraflow IDF Report Page 1 of 1 Return Equation Coefficients (FHA) Period (Yrs)B D E (N/A) 1 0.0000 0.0000 0.0000 -------- 2 241.5741 28.3001 1.1283 -------- 3 0.0000 0.0000 0.0000 -------- 5 287.3543 28.3001 1.1322 -------- 10 337.4067 28.7001 1.1400 -------- 25 0.0000 0.0000 0.0000 -------- 50 0.0000 0.0000 0.0000 -------- 100 463.3860 28.0001 1.1234 -------- Intensity = B / (Tc + D)^E Return Intensity Values (in/hr) Period (Yrs) 5 min 10 15 20 25 30 35 40 45 50 55 60 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2 4.63 3.95 3.44 3.04 2.72 2.46 2.24 2.06 1.90 1.76 1.64 1.54 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5 5.43 4.63 4.03 3.56 3.19 2.88 2.62 2.41 2.22 2.06 1.92 1.80 10 6.12 5.23 4.55 4.02 3.60 3.25 2.96 2.72 2.51 2.33 2.17 2.03 25 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100 9.12 7.78 6.77 5.99 5.36 4.84 4.41 4.05 3.74 3.47 3.24 3.03 Tc = time in minutes. Min Tc = 5 Page 54 of 56 05/11/2022 Page 55 of 56 05/11/2022 SECTION 4, APPENDIX: 2013 DRAINAGE REPORT Page 56 of 56 05/11/2022 DRAINAGE CALCULATIONS Project: Village Center Townhomes Phase 1 Prepared for: Brenwick Development Co., Inc. 12775 Horseferry Road S230 Carmel, IN 46032 TERRA Job Number: 130313-1.001 April 23, 2013 Revised May 20, 2013 Revised June 17, 2013 (added water quality calcs) TABLE OF CONTENTS Drainage Narrative • Site Location • Existing Surface Conditions • Adjacent Land Uses • Soil Types • Watershed Drainage Design Summary • Existing Drainage • Proposed Drainage Site Maps • Vicinity map • Soils Map Storm Sewer Design • Storm Sewer Basin Map • Rational Method Calculations • Pipe Design Calculations • Time of Concentration Calculations • Rainfall Intensity Table • Inlet Grate Design • Hydraulic Grade Line Calculations • Flood Routing Calculations Water Quality Calculations Appendix A • Drainage Calculations - Village of West Clay Masterplan for “Middle Section” prepared by The Schneider Corporation dated February 19, 1999 • Drainage Calculations – Village of West Clay Section 3004, Supplement to Masterplan for “Middle Section” prepared by The Schneider Corporation dated March 19, 1999 DRAINAGE NARRATIVE SITE LOCATION The site is a proposed 18 lot townhome subdivision to be located at the southwest corner of Broughton Street and Bird Cage Walk within the existing Village of West Clay development, generally located East of Town Road and South of West 131st Street. The project site is approximately 1.44 acres in size located in Section 28 – Township 18 North – Range 3 East in Carmel, Indiana. EXISTING SURFACE CONDITIONS The existing condition of the site is an existing vacant parcel within the Village of West Clay master planned community. The Village of West Clay has been under continuous development since 2000. The site has relatively flat grades, but generally drains from the northwest to the southeast to existing onsite storm sewers within the parcel and along the perimeter street. ADJACENT LAND USES North: Existing Single Family Residential & Attached Townhomes South: Mixed Use Retail, Commercial, Office West: Mixed Use Retail, Commercial, Office East: Vacant, proposed mixed use SOIL TYPES Soil maps from the Natural Resource Conservation Service (NRCS), Soil Conservation Service, indicate the presence of Brookston (Br) and Crosby Silt Loam (CrA) soils on site. Brookston is in hydrologic group B. Crosby is in hydrologic group C. WATERSHED Elliot Creek DRAINAGE DESIGN SUMMARY EXISTING DRAINAGE The proposed townhome site lies within an area of the planned Village of West Clay development which was previously platted and constructed to accommodate a mixed use development. Storm sewers currently draining the site were previously designed and constructed to accommodate the proposed use and the proposed townhome project will tie into the existing infrastructure. Existing storms sewers located within and adjacent to the site currently collect the onsite runoff, then flows southeasterly to one of several detention ponds located within the Village of West Clay. The existing pond (known as Druid Pond) is located at the southeastern corner of Horseferry Road and Bird Cage Walk, approximately 350-400 feet south of the proposed site. Note: Druid Pond is labeled “Pond 8” in the Masterplan Drainage Calculations noted below. Included in Appendix A of this report are the Drainage Master Plan Calculations for this area of the Village of Clay: • Drainage Calculations - Village of West Clay Masterplan for “Middle Section” prepared by The Schneider Corporation dated February 19, 1999 o Contains drainage pond routing models/design • Drainage Calculations – Village of West Clay Section 3004, Supplement to Masterplan for “Middle Section” prepared by The Schneider Corporation dated March 19, 1999 o Contains pipe sizing calculations for section 3004 Both of the Masterplan calculations noted above have been highlighted to denote items such as proposed townhome site location, storm sewer inlet connection points, etc… PROPOSED DRAINAGE As previously noted, the proposed townhome site has been design to tie into the existing storm sewers located on the site. Due to a conflict with the location of an existing storm sewer run, a portion of the existing piping is proposed to be removed and relocated to accommodate the one of the proposed townhome buildings. Consistent with the City of Carmel and Hamilton County Surveyor’s office requirements for stormwater management, the existing storm sewer system was previously designed and constructed to accommodate a 10 year storm event and detention facilities were designed and constructed to accommodate a 100 year event. As a result, the existing storm sewers with the Village of West Clay were designed and constructed to accommodate proposed use without the need for further detention on individual sites. In addition, a review of the attached Drainage Masterplan Calculations will confirm the subject site area was intended to drain into existing storm sewers at the southeast corner of the site (which then flows south into Pond 8 (Druid Pond). The drainage design and storms sewers included in the proposed townhome site is consistent with the Masterplan Calculations. (See attached Drainage Masterplan Calculations for more information.) Included in the body of this report are storm sewer pipe calculations verifying the capacity of the existing tie-in point and estimated runoff from the proposed project. Drainage from the proposed project, along with areas to the west, are proposed to tie into an existing 18” RCP at existing structure EX1 located in the drive along the south side of the site. The existing 18” RCP lies at a slope of 1.22% and has a capacity of carrying approximately 11.67 cfs while the calculated 10 year design flow is estimated to be 7.72 cfs as noted in the table below: Proposed Onsite 10 Yr Q Capacity of Existing 18” RCP @ 1.22% Slope 7.72 cfs 11.67 cfs Summary: The existing storm sewer tie-in point has capacity to accommodate the proposed site. SITE MAPS FEDVillage Center Townhomes Phase 1 Village of West Clay Brenwick Development, Co., Inc NORTH 1307 W. 161st Street Westfield, Indiana 46074 SOUTH Purdue Technology Center of Indianapolis 5225 Exploration Drive, Suite 133 Indianapolis, Indiana 46241 P: 317.399.1216 F: 317.663.3049 www.TERRAsitedev.comDEVELOPMENT & ENGINEERING CONSULTANTSGlebe StreetBroad St. Towne RoadGlebe Streetw. 131st StreetBird Cage Walk Broughton StreetHorseferry Rd %URXJKWRQ6W %URDG6W+RUVHIHUU\5G %LUG&DJH:DON*OHEH6W 8QLYHUVLW\&UHV 1 H Z 0 D U N HW 6 W ,YHV:D\&XUULHU6W*UHQYLOOH6W&KDSHO6TXD UH 6 W 0HHWLQJ+RXVH5G1 H Z 0 D U N H W 6W %U &U$ &U$ &U$ &U$ : )HHW 0HWHUVm 0DS6FDOH LISULQWHGRQ$VL]H [ VKHHW Custom Soil Resource Report Soil Map SITE SOILS MAP STORM SEWER DESIGN FEDCBAABCDEF987654321987654321Village Center Townhomes Phase 1 Village of West Clay Brenwick Development, Co., Inc NORTH 1307 W. 161st Street Westfield, Indiana 46074 SOUTH Purdue Technology Center of Indianapolis 5225 Exploration Drive, Suite 133 Indianapolis, Indiana 46241 P: 317.399.1216 F: 317.663.3049 www.TERRAsitedev.comDEVELOPMENT & ENGINEERING CONSULTANTS130313-1.001DKSDKSREVISIONS:DRAWING FILES:SHEET #:SHEET TITLE:CHECKED BY:DRAWN BY:PROJECT NUMBER:DATE:DATE BY DESCRIPTION DATE BY DESCRIPTION DATE: APRIL 22, 2013APRIL 22, 2013of135/15/13 DKS REVISED PER TAC COMMENTS 5/20/13 DKS REVISED PER TAC COMMENTS 6/14/13 DKS REVISED PER TAC COMMENTS BM / TBMEX. BURIED ELECTRICPROPOSED TOP OF CURB ELEVATIONPROPOSED FINISH PAVEMENT ELEVATIONPROPOSED FLOWLINEEX. SIGNEX. ELECTRIC PEDESTALEX. UTILITY POLEWEX. WATERLINE, VALVE & HYDRANTEX. IRRIGATION CONTROL VALVEEX. LIGHT POLEEX. GROUND LIGHTEX. STORM SEWER & CURB INLETEX. MANHOLEEX. SANITARY SEWERMINIMUM FLOOD PROTECTION GRADE(SEE GENRAL NOTE #18)MINIMUM LOWEST ADJACENT GRADE(SEE GENERAL NOTE #19)EXISTING CONTOUREX. SPOT ELEVATIONEX. TELEPHONE PEDESTALEMERGENCY FLOOD ROUTINGE800.32800xEXISTING CONCRETEEXISTING ASPHALT PATH STORM SEWER DESIGN CALCULATIONS -RATIONAL METHOD-PROJECT: Village Center Townhomes Phase 1STORM:10YearJOB #: 130313-1.001COMPUTED BY:DKSDATE: 5/20/13SHEET NO.: COMPOSITE BASINSTRAVELFROMTOBASINcAc*ATcIQSUMTcIQTIME#(acres)(min)(in/hr)(cfs)(c*A)(min)(in/hr)(cfs)(min)EX4EX3EX40.800.940.75115.263.960.75115.263.960.38EX3EX2EX30.800.370.3066.611.961.05125.065.300.38EX2602EX20.800.440.3566.612.331.40125.067.080.256036026030.800.290.23125.061.170.23125.061.170.776026016020.800.480.3895.722.201.63134.887.960.616016006010.800.010.0156.980.061.64144.717.720.24STRUCTUREBASINS 5/17/2013 11:29 AM STORM SEWER DESIGN CALCULATIONS-PIPE DESIGN-PROJECT: Village Center Townhomes Phase 1STORM:10YearJOB #: 130313-1.001COMPUTED BY:DKSDATE: 5/20/13SHEET NO.:0DESIGNCAP.FROMTOQLDIA.SLOPEQVEL. INVERT ELEV.(cfs)(ft)(in)%(cfs)(ft/s)UPDOWNUPDOWNUPDOWNEX4EX33.9668121.294.075.18896.02895.32892.00891.122.853.03EX3EX25.3068150.685.364.37895.32894.64891.07890.612.832.61EX26027.0845151.638.306.76894.64894.42890.54889.812.683.196036021.17139121.083.734.74895.02894.42891.62890.122.233.136026017.96109180.9010.035.67894.42895.42889.61888.633.125.106016007.7243180.9010.035.67895.42895.72888.53888.145.205.89600EX17.727181.2211.676.61895.72895.55888.04887.955.995.91RIM ELEV.STRUCTURECOVER (ft)5/17/2013 11:30 AM Time of Concentration WorksheetPROJECT:Village Center Townhomes Phase 1 Based on TR-55JOB #:130313-1.001Date:Overland Flow Channel Flow short grass 0.15 grass 0.03 farm, > 20% cover 0.17 concrete 0.0152 year, 24 hour rainfall =2.64inches dense grass 0.24 rip-rap 0.035minimum T_c =5.00minutes pavement 0.011 Overland flowseg. 1 Overland flowseg. 2 Shallow Concentrated FlowChannel FlowT_cBasinLengthSnT_tLengthSnT_tLengthSPaved/UnVel.T_tLengthaPwrSnVel.T_tname(ft)%(min)(ft)%(min)(ft)%(P or U)(ft/s)(min)(ft)(s.f.)(ft)(ft)%(ft/s)(min)(min)EX4401.000.24101401.00 U1.61111EX3151.000.2451501.00 U1.6126EX2151.000.2451501.00 U1.6126603401.000.24101750.60 P1.57212602301.000.2481300.60 P1.5719601101.000.243150.60 P1.57055/20/13Typical values for Manning's n 5/17/2013 11:30 AM 200-6 TABLE 201-2: Rainfall Intensities for Various Return Periods and Storm Durations Rainfall Intensity (Inches/Hour) Return Period (Years) Duration 2 5 10 25 50 100 5 Min. 4.63 5.43 6.12 7.17 8.09 9.12 10 Min. 3.95 4.63 5.22 6.12 6.90 7.78 15 Min. 3.44 4.03 4.55 5.33 6.01 6.77 20 Min. 3.04 3.56 4.02 4.71 5.31 5.99 30 Min. 2.46 2.88 3.25 3.81 4.29 4.84 40 Min. 2.05 2.41 2.71 3.18 3.59 4.05 50 Min. 1.76 2.06 2.33 2.73 3.07 3.47 1 Hr. 1.54 1.80 2.03 2.38 2.68 3.03 1.5 Hrs. 1.07 1.23 1.42 1.63 1.91 2.24 2 Hrs. 0.83 0.95 1.11 1.37 1.60 1.87 3 Hrs. 0.59 0.72 0.84 1.04 1.22 1.42 4 Hrs. 0.47 0.58 0.68 0.84 0.99 1.15 5 Hrs. 0.40 0.49 0.58 0.71 0.83 0.97 6 Hrs. 0.35 0.43 0.50 0.62 0.72 0.85 7 Hrs. 0.31 0.38 0.44 0.55 0.64 0.75 8 Hrs. 0.28 0.34 0.40 0.49 0.57 0.67 9 Hrs. 0.25 0.31 0.36 0.45 0.52 0.61 10 Hrs. 0.23 0.28 0.33 0.41 0.48 0.56 12 Hrs. 0.20 0.24 0.29 0.35 0.41 0.48 14 Hrs. 0.17 0.22 0.25 0.31 0.36 0.42 16 Hrs. 0.16 0.19 0.23 0.28 0.32 0.38 18 Hrs. 0.14 0.17 0.20 0.25 0.29 0.34 20 Hrs. 0.13 0.16 0.19 0.23 0.27 0.31 24 Hrs. 0.11 0.14 0.16 0.20 0.23 0.27 Source: Purdue,A.M., et. al., "Statistical Characteristics of Short Time Incremental Rainfall", Aug., 1992. (Values in this table are based on IDF equation and coefficients provided for Indianapolis, IN.) TABLE 201-3: Rainfall Depths for Various Return Periods 10 Year Rational Storm Event with 50% Clogging INLET NEENAH R-3405 (or EJIW 5250) A = Square Foot Open Neenah R-3405 =1.50 ft2 = 0.75 ft2 (50% Clogged) P = Weir Perimeter of Neenah R-3405 =7.50 ft = 3.75 ft (50% Clogged) Reference: Neenah Foundry Company Q = 3.0P(d)3/2 Weir Condition (d<0.3') Q = 4.89A(d)1/2 Orifice Condition (d>0.4') Reference: HERPICC Stormwater Drainage Manual-Revised July 1994 (Equations 5.3.2 & 5.3.3) (control depth is based on d(weir) if d(weir)<0.4, if d(weir)>0.4 then d(orifice)) Structure #Q Depth (d weir)Depth (d orifice)Controlling Depth Allowable Depth (cfs)(ft)(ft)(ft)6 inches 601 1.17 0.23 0.09 0.23 OK 602 2.20 0.44 0.16 0.40 OK 603 0.06 0.01 0.00 0.01 OK Inlet Capacity Calculations FishersPage 1 Line Inlet Gnd/Rim Drng Runoff Tc i Flow Line Line LineLine n-val Invert Invert Vel HGL HGL Capac CoverNo. ID El Up Area Coeff Sys Rate ID Length Size Slope Pipe Up Dn Up Up Dn Full Up(ft) (ac) (C) (min) (in/hr) (cfs) (ft) (in) (%) (ft) (ft) (ft/s) (ft) (ft) (cfs) (ft)1 601 895.42 0.00 0.00 13.8 0.00 11.68 601 Pipe 43 18 0.91 0.013 888.53 888.14 6.61 890.17 889.64 10.04 5.392 602 894.42 0.00 0.00 13.6 0.00 11.62 602 Pipe 109 18 0.90 0.013 889.61 888.63 6.58 892.18 890.85 9.95 3.313 EX 2 894.64 0.00 0.00 11.5 0.00 8.25 EX 2 Pipe 57 15 1.27 0.013 890.54 889.81 6.72 893.80 892.86 7.28 2.854 EX 3 895.32 0.00 0.00 11.2 0.00 5.92 EX 3 Pipe 68 15 0.68 0.013 891.07 890.61 4.82 894.47 893.90 5.32 3.005 EX 4 896.02 0.00 0.00 11.0 0.00 3.96 EX 4 Pipe 68 12 1.29 0.013 892.00 891.12 5.04 895.37 894.53 4.05 3.026 603 895.02 0.00 0.00 12.0 0.00 1.17 603 Pipe 139 12 1.08 0.013 891.62 890.12 1.49 893.01 892.86 3.70 2.40Carmel TownhomesNumber of lines: 6 Date: 05-17-2013NOTES: Intensity = 337.41 / (Inlet time + 28.70) ^ 1.14 -- Return period = 10 Yrs. ; ** Critical depth Hydraflow Storm Sewers Extension 0 25 50 75 100 125 150 175 200 225 250 275 300 325 350885.00885.00889.00889.00893.00893.00897.00897.00901.00901.00905.00905.00Sta 0+00.00 - OutfallGrnd. El. 895.72Inv. El. 888.14 InSta 0+42.693 - Ln: 1Rim El. 895.42Inv. El. 888.53 OutInv. El. 888.63 In43Lf - 18" @ 0.91%Sta 1+51.852 - Ln: 2Rim El. 894.42Inv. El. 889.61 OutInv. El. 889.81 In109Lf - 18" @ 0.90%Sta 2+09.348 - Ln: 3Rim El. 894.64Inv. El. 890.54 OutInv. El. 890.61 In57Lf - 15" @ 1.27%Sta 2+77.238 - Ln: 4Rim El. 895.32Inv. El. 891.07 OutInv. El. 891.12 In68Lf - 15" @ 0.68%Sta 3+45.259 - Ln: 5Rim El. 896.02Inv. El. 892.00 Out68Lf - 12" @ 1.29% HGL Reach (ft)Elev. (ft)Proj. file: Carmel Townhomes.stmHydraflow Storm Sewers ExtensionStorm Sewer Profile 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140887.00887.00890.00890.00893.00893.00896.00896.00899.00899.00902.00902.00Sta 0+00.00Rim El. 894.42Inv. El. 889.61 OutInv. El. 890.12 InSta 1+38.996 - Ln: 6Rim El. 895.02Inv. El. 891.62 Out139Lf - 12" @ 1.08% HGL Reach (ft)Elev. (ft)Proj. file: Carmel Townhomes.stmHydraflow Storm Sewers ExtensionStorm Sewer Profile STORM SEWER DESIGN CALCULATIONS -RATIONAL METHOD-PROJECT: Village Center Townhomes Phase 1STORM:100 YearJOB #: 130313-1.001COMPUTED BY:DKSDATE: 4/23/13SHEET NO.: COMPOSITE BASINSTRAVELFROM TO BASIN cAc*ATc I Q SUM Tc I Q TIME#(acres)(min)(in/hr)(cfs)(c*A)(min)(in/hr)(cfs)(min)EX4EX3 EX40.800.94 0.75 11 7.48 5.62 0.75 11 7.48 5.62 0.38EX3EX2 EX30.800.37 0.30 6 9.22 2.73 1.05 12 7.21 7.56 0.38EX2602 EX20.800.44 0.35 6 9.22 3.25 1.40 12 7.21 10.10 0.25603602 6030.800.29 0.23 12 7.21 1.67 0.23 12 7.21 1.67 0.77602601 6020.800.48 0.38 9 8.08 3.10 1.63 13 6.97 11.37 0.61601600 6010.800.01 0.01 5 9.69 0.08 1.64 14 6.74 11.05 0.24Total Flow Running to Structure 602STRUCTURE BASINS 5/17/2013 12:43 PM Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2009 by Autodesk, Inc. v6.066 Friday, May 17, 2013 Hyd. No. 1 100 year to 602 Hydrograph type = SCS Runoff Peak discharge = 11.40 cfs Storm frequency = 100 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 29,659 cuft Drainage area = 2.040 ac Curve number = 77 Basin Slope = 0.0 %Hydraulic length = 0 ft Tc method = USER Time of conc. (Tc)= 13.00 min Total precip.= 6.46 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Q (cfs) 0.00 0.00 2.00 2.00 4.00 4.00 6.00 6.00 8.00 8.00 10.00 10.00 12.00 12.00 Q (cfs) Time (hrs) 100 year to 602 Hyd. No. 1 -- 100 Year Hyd No. 1 100 year flow to str 602 Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2009 by Autodesk, Inc. v6.066 Friday, May 17, 2013 Hyd. No. 2 Overflow 602 Hydrograph type = Reservoir Peak discharge = 9.055 cfs Storm frequency = 100 yrs Time to peak = 726 min Time interval = 2 min Hyd. volume = 29,305 cuft Inflow hyd. No.= 1 - 100 year to 602 Max. Elevation = 895.30 ft Reservoir name = Retention Pond Max. Storage = 4,294 cuft Storage Indication method used. 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Q (cfs) 0.00 0.00 2.00 2.00 4.00 4.00 6.00 6.00 8.00 8.00 10.00 10.00 12.00 12.00 Q (cfs) Time (min) Overflow 602 Hyd. No. 2 -- 100 Year Hyd No. 2 Hyd No. 1 Total storage used = 4,294 cuft Pond Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2009 by Autodesk, Inc. v6.066 Friday, May 17, 2013 Pond No. 1 - Retention Pond Pond Data Contours - User-defined contour areas. Conic method used for volume calculation. Begining Elevation = 894.42 ft Stage / Storage Table Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft) 0.00 894.42 00 0 0 0.08 894.50 162 4 4 0.18 894.60 607 36 40 0.28 894.70 1,460 100 141 0.38 894.80 2,843 211 352 0.48 894.90 5,484 409 761 0.58 895.00 7,317 638 1,399 0.68 895.10 8,872 808 2,207 0.78 895.20 10,566 971 3,178 0.88 895.30 13,000 1,176 4,354 0.98 895.40 15,200 1,408 5,762 Culvert / Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in)Inactive 0.00 0.00 0.00 Span (in)= 6.00 0.00 0.00 0.00 No. Barrels = 1 0 0 0 Invert El. (ft)= 827.00 0.00 0.00 0.00 Length (ft)= 40.00 0.00 0.00 0.00 Slope (%)= 0.50 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff.= 0.60 0.60 0.60 0.60 Multi-Stage = n/a No No No Crest Len (ft)= 10.00 0.00 0.00 0.00 Crest El. (ft)= 894.80 0.00 0.00 0.00 Weir Coeff.= 2.60 3.33 3.33 3.33 Weir Type = Broad --- --- --- Multi-Stage = No No No No Exfil.(in/hr)= 0.000 (by Wet area) TW Elev. (ft)= 0.00 Note: Culvert/Orifice outflows are analyzed under inlet (ic) and outlet (oc) control. Weir risers checked for orifice conditions (ic) and submergence (s). Stage / Storage / Discharge Table Stage Storage Elevation Clv A Clv B Clv C PrfRsr Wr A Wr B Wr C Wr D Exfil User Total ft cuft ft cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs cfs 0.00 0 894.42 0.00 --- --- --- 0.00 --- --- --- --- --- 0.000 0.08 4 894.50 0.00 --- --- --- 0.00 --- --- --- --- --- 0.000 0.18 40 894.60 0.00 --- --- --- 0.00 --- --- --- --- --- 0.000 0.28 141 894.70 0.00 --- --- --- 0.00 --- --- --- --- --- 0.000 0.38 352 894.80 0.00 --- --- --- 0.00 --- --- --- --- --- 0.000 0.48 761 894.90 0.00 --- --- --- 0.82 --- --- --- --- --- 0.823 0.58 1,399 895.00 0.00 --- --- --- 2.33 --- --- --- --- --- 2.326 0.68 2,207 895.10 0.00 --- --- --- 4.27 --- --- --- --- --- 4.272 0.78 3,178 895.20 0.00 --- --- --- 6.58 --- --- --- --- --- 6.578 0.88 4,354 895.30 0.00 --- --- --- 9.19 --- --- --- --- --- 9.192 0.98 5,762 895.40 0.00 --- --- --- 12.08 --- --- --- --- --- 12.08 Between Lots 104 & 201 A = Drainage area 2.53 Ac (Townhomes + Ai = Impervious area 2.15 Ac Exsting and Future I = Post-development impervious percentage 85%Parking) P = Precipitation 1.00 in From Exhibit 701-1 based on 85% Impervious, CN=98.2 Using CN = 98.2 along with Tc = 14 min (per storm sewer report) for A = 2.53ac, Runoff Rate from 1.00" Storm = 2.45 cfs WATER QUALITY DESIGN CALCULATIONS 06/28/07 Exhibit 701-1: Curve Number Calculation for Water Quality Storm Event Water Quality Curve Number7072747678808284868890929496981000 102030405060708090100Percent ImperviousnessWater Quality Curve Number (CNwq) Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2009 by Autodesk, Inc. v6.066 Thursday, Jun 6, 2013 Hyd. No. 1 Townhome Hydrograph type = SCS Runoff Peak discharge = 2.454 cfs Storm frequency = 1 yrs Time to peak = 722 min Time interval = 2 min Hyd. volume = 7,247 cuft Drainage area = 2.530 ac Curve number = 98.2 Basin Slope = 0.0 %Hydraulic length = 0 ft Tc method = USER Time of conc. (Tc)= 14.00 min Total precip.= 1.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Q (cfs) 0.00 0.00 1.00 1.00 2.00 2.00 3.00 3.00 Q (cfs) Time (hrs) Townhome Hyd. No. 1 -- 1 Year Hyd No. 1 APPENDIX A SITEPOND 8 SITEPOND 8 STREET INLET ALONG BIRD CAGE WALK STREET INLET ALONG BROUGHTON STREET SITE OUTLET SITE