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Home My WebLink AboutDrainage ReportSWINLEY FOREST DRAINAGE REPORT PREPARED FOR: Swinley Forest, LLC Contact Person: Mark Gradison 6330 East 75th Street, Suite 156 Indianapolis, IN 46250 Contact Phone Number: (317) 506-1037 Contact Email: mgradison@gradison.net PREPARED BY: Stoeppelwerth & Associates, Inc. Contact Person: Nicholas E. Stevens, EI, SI 7965 East 106th Street Fishers, Indiana 46038 Contact Phone Number: (317) 570-4771 Contact Email Address: nstevens@stoeppelwerth.com DATE PREPARED: December 18th, 2024 DRAINAGE REPORT SWINLEY FOREST JOB # 111895GBC TABLE OF CONTENTS ENGINEERING CERTIFICATION CERTIFICATE OF INSURANCE DRAINAGE NARRATIVE EXHIBITS LOCATION MAP FLOODPLAIN MAP SOILS MAP RAINFALL DATA APPENDIX A – EXISTING SITE CONDITIONS CALCULATIONS APPENDIX B - PROPOSED SITE CONDITIONS CALCULATIONS APPENDIX C - STORM SEWER DESIGN CALCULATIONS APPENDIX D - WATER QUALITY CALCULATIONS APPENDIX E - EMERGENCY CALCULATIONS APPENDIX F - BASIN MAPS 12/18/2024 Page 2 of 82 ENGINEERING CERTIFICATION SWINLEY FOREST DRAINAGE REPORT AND ANALYSIS Brian M. Brown, PE, CFM Indiana Registration No. 11200386 I, Brian M Brown, certify that this drainage report and supporting calculations are in compliance with the requirements set forth by the Hamilton County Drainage Board and/or Hamilton County Surveyor in the Hamilton County, Indiana Stormwater Management Ordinance. 12/18/2024 Page 3 of 82 ANY PROPRIETOR/PARTNER/EXECUTIVEOFFICER/MEMBER EXCLUDED? INSR ADDL SUBRLTR INSD WVD PRODUCER CONTACTNAME: FAXPHONE(A/C, No):(A/C, No, Ext): E-MAILADDRESS: INSURER A : INSURED INSURER B : INSURER C : INSURER D : INSURER E : INSURER F : POLICY NUMBER POLICY EFF POLICY EXPTYPE OF INSURANCE LIMITS(MM/DD/YYYY) (MM/DD/YYYY) AUTOMOBILE LIABILITY UMBRELLA LIAB EXCESS LIAB WORKERS COMPENSATIONAND EMPLOYERS' LIABILITY DESCRIPTION OF OPERATIONS / LOCATIONS / VEHICLES (ACORD 101, Additional Remarks Schedule, may be attached if more space is required) AUTHORIZED REPRESENTATIVE EACH OCCURRENCE $ DAMAGE TO RENTEDCLAIMS-MADE OCCUR $PREMISES (Ea occurrence) MED EXP (Any one person) $ PERSONAL & ADV INJURY $ GEN'L AGGREGATE LIMIT APPLIES PER:GENERAL AGGREGATE $ PRO-POLICY LOC PRODUCTS - COMP/OP AGGJECT OTHER:$ COMBINED SINGLE LIMIT $(Ea accident) ANY AUTO BODILY INJURY (Per person) $ OWNED SCHEDULED BODILY INJURY (Per accident) $AUTOS ONLY AUTOS HIRED NON-OWNED PROPERTY DAMAGE $AUTOS ONLY AUTOS ONLY (Per accident) $ OCCUR EACH OCCURRENCE CLAIMS-MADE AGGREGATE $ DED RETENTION $ PER OTH-STATUTE ER E.L. EACH ACCIDENT E.L. DISEASE - EA EMPLOYEE $ If yes, describe under E.L. DISEASE - POLICY LIMITDESCRIPTION OF OPERATIONS below INSURER(S) AFFORDING COVERAGE NAIC # COMMERCIAL GENERAL LIABILITY Y / N N / A (Mandatory in NH) SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED BEFORE THE EXPIRATION DATE THEREOF, NOTICE WILL BE DELIVERED IN ACCORDANCE WITH THE POLICY PROVISIONS. 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. 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. 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). COVERAGES CERTIFICATE NUMBER: REVISION NUMBER: CERTIFICATE HOLDER CANCELLATION © 1988-2015 ACORD CORPORATION. All rights reserved.ACORD 25 (2016/03) CERTIFICATE OF LIABILITY INSURANCE DATE (MM/DD/YYYY) $ $ $ $ $ The ACORD name and logo are registered marks of ACORD 7/31/2024 (317) 808-7711 20478 Stoeppelwerth and Associates, Inc. and Sand Key Properties 7965 East 106th Street Fishers, IN 46038 20508 20443 A 1,000,000 6079062911 8/1/2024 8/1/2025 100,000 15,000 1,000,000 2,000,000 2,000,000 EPLI 10,000 1,000,000B BUA6043009424 8/1/2024 8/1/2025 2,000,000C CUE6079062925 8/1/2024 8/1/2025 2,000,000 10,000 2,000,000 C WC 6 43009438 8/1/2024 8/1/2025 1,000,000N1,000,000 1,000,000 A Commercial Property 6079062911 8/1/2024 Buildings 2,232,268 C Professional E&O AEH008216301 1/28/2024 1/28/2025 Per Occ/Aggregate 2,000,000 TO WHOM IT MAY CONCERN STOEAND-01 KEADAMS Conner Insurance Inc. 8445 Keystone Crossing Suite 200 Indianapolis, IN 46240 National Fire Insurance Company of Hartford Valley Forge Insurance Company Continental Casualty Company X 8/1/2025 X X X X XX X X X 12/18/2024 Page 4 of 82 DRAINAGE NARRATIVE SWINLEY FOREST JOB #111895GBC INTRODUCTION Swinley Forest, LLC is proposing the development of a residential subdivision in Hamilton County to be known as Swinley Forest. The site is located southwest of the intersection of Westfield Boulevard and East 116th Street. The site is more specifically located in part of the Northwest Quarter of the Northeast Quarter of Section 1, Township 17 North, Range 3 East, of the second Principal Meridian, Hamilton County, IN. EXISTING SITE CONDITIONS The existing site is composed of open space and wooded areas, with Carmel Creek running along the eastern edge of the proposed developed area. There is a small amount of offsite coming in along the western edge of the site. According to FEMA FIRM Panel, 18057C0209G with an effective date of 11/19/2014, the site is partially located in Zone AE, a Special Flood Haard Area, with a BFE of 826.2. This BFE is currently being revised and the proposed BFE after the LOMR is expected to be approximately 824. The on-site soil consists of type B Shoals silt loam-Urban land complex and type C, Miami silt loam-Urban land complex. Table 1: Existing Site Conditions – Release Rates with Offsite Storm Event Onsite Area (ac) Onsite CN Offsite Area (ac) Offsite CN 2-Year 10-Year 100-Year Existing 3.04 72 0.59 70 2.71 cfs 6.33 cfs 16.01 cfs PROPOSED SITE CONDITIONS As per discussions in a pre-filing meeting with Engineering, to determine allowable release rates, the area of the site that is planned to be disturbed has been delineated. This acreage was then applied to the 0.1 cfs per acre and the 0.3 cfs per acre. Table 2: Proposed Site Conditions – Onsite Release Rates Storm Event 10-Year 100-Year Unit Allowable Release Rate 0.1 cfs/acre 0.3 cfs/acre Onsite Acreage 3.04 = acres 3.04 = acres Calculation 0.1 cfs/acre x acres 0.3 cfs/acre x acres Onsite Allowable Release Rates 0.30 cfs 0.91 cfs Offsite Acreage 0.59 = acres 0.59 = acres Offsite Flow (From ICPR Basin Summary) 0.85 cfs 2.27 cfs Calculation Onsite Allowable + Offsite Flow Onsite Allowable + Offsite Flow Allowable Release Rates 1.15 cfs 3.18 cfs 12/18/2024 Page 5 of 82 The site will have 4 lots that will drain via overland flow and a small pipe system to a dry basin on the northern end of the site. This pond will also take in a small amount of offsite from the west. The pond will outlet to Carmel Creek running along the eastern side of the site. The outlet structure needed to have orifices below the minimum size to meet the release rates. Thus, a model was run to determine if the ponds have enough storage to meet the release rates and still have enough freeboard. It was determined that they do, so another model was run with orifices at minimum size to determine the actual critical elevations and release rates for the site. Reports for both models have been included within Appendix A. A summary of the release rates has been included in Table 3 below. Table 3: Proposed Site Conditions – Overall Release Rates Storm Event 2-Year 10-Year 100-Year Proposed Onsite Only Release Rates without Minimum Orifice 0.26 cfs 0.30 cfs 0.89 cfs Proposed Release Rates with Offsite without Minimum Orifice 0.27 cfs 0.31 cfs 1.80 cfs Proposed Onsite Only Release Rates with Minimum Orifice 0.58 cfs 0.72 cfs 1.10 cfs Proposed Release Rates with Offsite with Minimum Orifice 0.60 cfs 0.76 cfs 1.47 cfs The proposed peak discharges are based on TR-55 methodology. A detention analysis was performed using the 2, 10 and 100-year storm events and their corresponding 24-hour rainfall depths. The NRCS Type II rainfall distribution was used to generate the hydrographs. Table 4 below includes a summary of the critical elevations for the site. These critical elevations are based on the orifices being at the minimum size. Table 4: Proposed Site Conditions – Critical Elevations Storm Event Top of Bank 2-Year 10-Year 100-Year Dry Pond 826.00 822.67 823.49 824.80 STORM SEWER DESIGN The use of Manning’s equation was used for determination of storm drain pipe sizes for non-submerged conditions. The storm drain system is capable of passing the 10-year storm event with free water surface elevations below the crown of pipe. Minimum storm drain flowing velocity for full pipe flow shall be 2.5 fps and maximum storm drain flowing velocity for full pipe flow is 10 fps. The inlet grate castings are designed such that the 10-year storm event shall be sufficiently conveyed into the storm sewer system at 50% efficiency. The inlets are spaced to allow one lane of traffic to remain open during the 10-year storm event. 12/18/2024 Page 6 of 82 WATER QUALITY Water quality for the site will be handled via a water quality unit that will be replacing structure 403. The structure is expected to be a CS-4, with 12” inlet and outlet pipes. REFERENCES Design and data methods are based on the following references: 1. Hamilton County Stormwater Technical Standards Manual 2. HERPICC Stormwater Drainage Manual 3. USDA – Urban Hydrology for Small Watersheds 4. USDA – Soil Conservation Service 12/18/2024 Page 7 of 82 EXHIBITS 1LOCATION MAP 2FLOODPLAIN MAP 3SOILS MAP AND REPORT 4HAMILTON COUNTY RAINFALL DATA 12/18/2024 Page 8 of 82 12/18/2024 Page 9 of 82 SI T E Na t i o n a l F l o o d H a z a r d L a y e r F I R M e t t e 0 50 0 1, 0 0 0 1, 5 0 0 2, 0 0 0 25 0 Fe e t SE E F I S R E P O R T F O R D E T A I L E D L E G E N D A N D I N D E X M A P F O R F I R M P A N E L L A Y O U T SP E C I A L F L O O D HA Z A R D A R E A S Wi t h o u t B a s e F l o o d E l e v a t i o n ( B F E ) Zo n e A , V , A 9 9 Wi t h B F E o r D e p t h Zo n e A E , A O , A H , V E , A R Re g u l a t o r y F l o o d w a y 0. 2 % A n n u a l C h a n c e F l o o d H a z a r d , A r e a s of 1 % a n n u a l c h a n c e f l o o d w i t h a v e r a g e de p t h l e s s t h a n o n e f o o t o r w i t h d r a i n a g e ar e a s o f l e s s t h a n o n e s q u a r e m i l e Zo n e X Fu t u r e C o n d i t i o n s 1 % A n n u a l Ch a n c e F l o o d H a z a r d Zo n e X Ar e a w i t h R e d u c e d F l o o d R i s k d u e t o Le v e e . S e e N o t e s . Zo n e X Ar e a w i t h F l o o d R i s k d u e t o L e v e e Zo n e D NO S C R E E N Ar e a o f M i n i m a l F l o o d H a z a r d Zo n e X Ar e a o f U n d e t e r m i n e d F l o o d H a z a r d Zo n e D Ch a n n e l , C u l v e r t , o r S t o r m S e w e r Le v e e , D i k e , o r F l o o d w a l l Cr o s s S e c t i o n s w i t h 1 % A n n u a l C h a n c e 17 . 5 Wa t e r S u r f a c e E l e v a t i o n Co a s t a l T r a n s e c t Co a s t a l T r a n s e c t B a s e l i n e Pr o f i l e B a s e l i n e Hy d r o g r a p h i c F e a t u r e Ba s e F l o o d E l e v a t i o n L i n e ( B F E ) Ef f e c t i v e L O M R s Li m i t o f S t u d y Ju r i s d i c t i o n B o u n d a r y Di g i t a l D a t a A v a i l a b l e No D i g i t a l D a t a A v a i l a b l e Un m a p p e d Th i s m a p c o m p l i e s w i t h F E M A ' s s t a n d a r d s f o r t h e u s e o f di g i t a l f l o o d m a p s i f i t i s n o t v o i d a s d e s c r i b e d b e l o w . 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X Q ² - X Q 7K H R U W K R S K R W R R U R W K H U E D V H P D S R Q Z K L F K W K H V R L O O L Q H V Z H U H FR P S L O H G D Q G G L J L W L ] H G S U R E D E O \ G L I I H U V I U R P W K H E D F N J U R X Q G LP D J H U \ G L V S O D \ H G R Q W K H V H P D S V $ V D U H V X O W V R P H P L Q R U VK L I W L Q J R I P D S X Q L W E R X Q G D U L H V P D \ E H H Y L G H Q W +\ G U R O R J L F 6 R L O * U R X S ² + D P L O W R Q & R X Q W \ , Q G L D Q D 2 Q V L W H 1D W X U D O 5 H V R X U F H V &R Q V H U Y D W L R Q 6 H U Y L F H :H E 6 R L O 6 X U Y H \ 1D W L R Q D O & R R S H U D W L Y H 6 R L O 6 X U Y H \ 3D J H R I 12/18/2024 Page 12 of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²+DPLOWRQ&RXQW\,QGLDQD 2QVLWH 1DWXUDO5HVRXUFHV &RQVHUYDWLRQ6HUYLFH :HE6RLO6XUYH\ 1DWLRQDO&RRSHUDWLYH6RLO6XUYH\ 3DJHRI 12/18/2024 Page 13 of 82 5DWLQJ2SWLRQV $JJUHJDWLRQ0HWKRG'RPLQDQW&RQGLWLRQ &RPSRQHQW3HUFHQW&XWRII1RQH6SHFLILHG 7LHEUHDN5XOH+LJKHU +\GURORJLF6RLO*URXS²+DPLOWRQ&RXQW\,QGLDQD 2QVLWH 1DWXUDO5HVRXUFHV &RQVHUYDWLRQ6HUYLFH :HE6RLO6XUYH\ 1DWLRQDO&RRSHUDWLYH6RLO6XUYH\ 3DJHRI 12/18/2024 Page 14 of 82 200-6 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 12/18/2024 Page 15 of 82 Rainfall Depth (Inches) Return Period (Years) Duration 2 5 10 25 50 100 24 Hrs. 2.66 3.27 3.83 4.72 5.52 6.46 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 201-4: NRCS Type 2 Rainfall Distribution Ordinates (for use when not already built in the computer program ) Cumulative Percent Cumulative Percent of Storm Depth Cumulative Percent Cumulative Percent of Storm Depth of Storm Time of Storm Time 0 0 52 73 4 1 53 75 10 2.5 54 77 1545578 2065680 2585781 30 10 58 82 33 12 60 83.5 35 13 63 86 38 15 65 87 40 16.5 67 88 42 19 70 89.5 43 20 72 91 44 21 75 92 45 22 77 93 46 23 80 94 47 26 83 95 48 30 85 96 48.5 34 87 97 48.7 37 90 98 49 50 95 99 50 64 100 100 51 71 200-7 12/18/2024 Page 16 of 82 APPENDIX A EXISTING SITE CONDITIONS CALCULATIONS 12/18/2024 Page 17 of 82 -R E * % & 'H V F U L S W L R Q Q / 3 V 7W Q / 3 V 'H V F U L S W L R Q V 9 / 7 W / 9 ' H V F U L S W L R Q 9 / 7 W / 9 7F W R W D O 7F W R W D O I W L Q I W I W K U V 3 D Y H G 8 Q S D Y H G I W I W I W V I W K U V K U V P L Q 'U \ 3 R Q G ' H Q V H * U D V V H V 8 Q S D Y H G & K D Q Q H O 2I I V L W H W R ' U \ 3 R Q G ' H Q V H * U D V V H V 8 Q S D Y H G & K D Q Q H O 6Z L Q G O H \ ) R U H V W 7L P H R I & R Q F H Q W U D W L R Q V 3U H ' H Y H O R S H G , & 3 5 %D V L Q 6K H H W ) O R Z 6 K D O O R Z & R Q F H Q W U D W H G ) O R Z & K D Q Q H O 3 L S H ) O R Z 7 R W D O 7 R & 12/18/2024 Page 18 of 82 -RE*%&3UH'HYHORSHG,&35 6RLO *URXS &RYHU'HVFULSWLRQ FRYHUW\SHWUHDWPHQWDQG K\GURORJLFFRQGLWLRQ&1 $UHD$F &1 $UHD 6RLO *URXS &RYHU'HVFULSWLRQ FRYHUW\SHWUHDWPHQWDQG K\GURORJLFFRQGLWLRQ&1 $UHD$F &1 $UHD % 2SHQ6SDFH*RRG & :RRGV*RRG & 2SHQ6SDFH*RRG & :RRGV*RRG ' ,PSHUYLRXV 7RWDO 7RWDO &1&DOFXODWLRQV6ZLQGOH\)RUHVW 2IIVLWHWR'U\%DVLQ &1 ([LVWLQJ6LWH &1 2QVLWH&XUYH1XPEHUDGMXVWHGWRWKHQH[W OHVVLQILOWUDWLQJFDSDFLW\FDWHJRU\SHURUGLQDQFH 12/18/2024 Page 19 of 82 Swindley Forest Existing Conditions Report 1 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/17/2024 12:31 Background Image: Existing Conditions Simple Basin: Offsite Basin Scenario: Existing Conditions Node: Outlet 1 Hydrograph Method: NRCS Unit Hydrograph Infiltration Method: Curve Number Time of Concentration: 14.6000 min Max Allowable Q: 999.00 cfs Time Shift: 0.0000 hr Unit Hydrograph: UH484 Peaking Factor: 484.0 Area: 0.5900 ac Curve Number: 70.0 Ia/S: 0.00 % Impervious: 0.00 % DCIA: 0.00 % Direct: 0.00 Rainfall Name: Comment: Simple Basin: Onsite Basin Scenario: Existing Conditions 12/18/2024 Page 20 of 82 Swindley Forest Existing Conditions Report 2 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/17/2024 12:31 Node: Outlet 1 Hydrograph Method: NRCS Unit Hydrograph Infiltration Method: Curve Number Time of Concentration: 10.4000 min Max Allowable Q: 999.00 cfs Time Shift: 0.0000 hr Unit Hydrograph: UH484 Peaking Factor: 484.0 Area: 3.0400 ac Curve Number: 72.0 Ia/S: 0.00 % Impervious: 0.00 % DCIA: 0.00 % Direct: 0.00 Rainfall Name: Comment: Node: Outlet 1 Scenario: Existing Conditions Type: Time/Stage Base Flow: 0.00 cfs Initial Stage: 815.00 ft Warning Stage: 824.00 ft Alert Stage: 824.00 ft Boundary Stage: Year Month Day Hour Stage [ft] 0 0 0 0.0000 815.00 0 0 0 12.0000 824.00 0 0 0 48.0000 815.00 Comment: Simulation: 002yr Scenario: Existing Conditions Run Date/Time: 12/17/2024 12:24:38 PM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 12/18/2024 Page 21 of 82 Swindley Forest Existing Conditions Report 3 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/17/2024 12:31 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Restart File Save Restart: False Resources & Lookup Tables Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 2.66 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy 12/18/2024 Page 22 of 82 Swindley Forest Existing Conditions Report 4 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/17/2024 12:31 Comment: Simulation: 010yr Scenario: Existing Conditions Run Date/Time: 12/17/2024 12:24:47 PM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Restart File Save Restart: False Resources & Lookup Tables Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options 12/18/2024 Page 23 of 82 Swindley Forest Existing Conditions Report 5 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/17/2024 12:31 Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 3.83 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy Comment: Simulation: 100yr Scenario: Existing Conditions Run Date/Time: 12/17/2024 12:24:55 PM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 12/18/2024 Page 24 of 82 Swindley Forest Existing Conditions Report 6 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/17/2024 12:31 Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Restart File Save Restart: False Resources & Lookup Tables Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 6.46 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy Comment: Simple Basin : Multi Item | (name, sim) : Runoff Summary [Existing Conditions] Basin Name Sim Name Max Flow [cfs] Time to Max Flow [hrs] Total Rainfall [in] Total Runoff [in] Area [ac] Offsite Basin 002yr 0.34 12.0833 2.66 0.53 0.5900 Offsite Basin 010yr 0.85 12.0833 3.83 1.22 0.5900 Offsite Basin 100yr 2.28 12.0667 6.46 3.18 0.5900 Onsite Basin 002yr 2.41 12.0500 2.66 0.61 3.0400 Onsite Basin 010yr 5.52 12.0333 3.83 1.34 3.0400 Onsite Basin 100yr 13.88 12.0333 6.46 3.38 3.0400 12/18/2024 Page 25 of 82 Swindley Forest Existing Conditions Report 7 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/17/2024 12:31 Node Max Conditions w/ Times : Multi Item | (name, sim) [Existing Conditions] Node Name Sim Name Warnin g Stage [ft] Alert Stage [ft] Max Stage [ft] Min/Ma x Delta Stage [ft] Max Total Inflow [cfs] Max Total Outflow [cfs] Max Surface Area [ft2] Time to Max Stage [hr] Time to Min/Ma x Delta Stage [hr] Time to Max Total Inflow [hr] Time to Max Total Outflow [hr] Outlet 1 002yr 824.00 824.00 824.00 0.0125 2.71 0.00 0 12.010 5 1.4605 12.043 8 0.0000 Outlet 1 010yr 824.00 824.00 824.00 0.0125 6.33 0.00 0 12.010 5 1.4605 12.043 8 0.0000 Outlet 1 100yr 824.00 824.00 824.00 0.0125 16.01 0.00 0 12.010 5 1.4605 12.043 8 0.0000 12/18/2024 Page 26 of 82 16.01 6.33 2.71 APPENDIX B PROPOSED SITE CONDITIONS CALCULATIONS 12/18/2024 Page 27 of 82 -R E * % & 'H V F U L S W L R Q Q / 3 V 7W Q / 3 V 'H V F U L S W L R Q V 9 / 7 W / 9 ' H V F U L S W L R Q 9 / 7 W / 9 7F W R W D O 7F W R W D O I W L Q I W I W K U V 3 D Y H G 8 Q S D Y H G I W I W I W V I W K U V K U V P L Q 'U \ 3 R Q G ' H Q V H * U D V V H V 3 D Y H G 3 L S H ) O R Z 2I I V L W H W R ' U \ 3 R Q G ' H Q V H * U D V V H V 8 Q S D Y H G 3 L S H ) O R Z 7L P H R I & R Q F H Q W U D W L R Q V 3R V W ' H Y H O R S H G , & 3 5 %D V L Q 6K H H W ) O R Z 6 K D O O R Z & R Q F H Q W U D W H G ) O R Z & K D Q Q H O 3 L S H ) O R Z 7 R W D O 7 R & 6Z L Q G O H \ ) R U H V W 12/18/2024 Page 28 of 82 -RE*%&3RVW'HYHORSHG,&35 6RLO *URXS &RYHU'HVFULSWLRQ FRYHUW\SHWUHDWPHQWDQG K\GURORJLFFRQGLWLRQ&1 $UHD$F &1 $UHD 6RLO *URXS &RYHU'HVFULSWLRQ FRYHUW\SHWUHDWPHQWDQG K\GURORJLFFRQGLWLRQ&1 $UHD$F &1 $UHD ' 2SHQ6SDFH*RRG & :RRGV*RRG ' ,PSHUYLRXV 7RWDO 7RWDO &1&DOFXODWLRQV 'U\%DVLQ &1 6ZLQGOH\)RUHVW 2IIVLWHWR'U\%DVLQ &1 2QVLWH&XUYH1XPEHUDGMXVWHGWRWKHQH[W OHVVLQILOWUDWLQJFDSDFLW\FDWHJRU\SHURUGLQDQFH 12/18/2024 Page 29 of 82 Swindley Forest Proposed Conditions 1 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Background Image: Proposed with Offsite Simple Basin: Pond 1 Offsite Basin Scenario: Preliminary Proposed with Offsite Node: Pond 1 Hydrograph Method: NRCS Unit Hydrograph Infiltration Method: Curve Number Time of Concentration: 14.7000 min Max Allowable Q: 999.00 cfs Time Shift: 0.0000 hr Unit Hydrograph: UH484 Peaking Factor: 484.0 Area: 0.5900 ac Curve Number: 70.0 Ia/S: 0.00 % Impervious: 0.00 % DCIA: 0.00 % Direct: 0.00 Rainfall Name: Comment: Simple Basin: Pond 1 Onsite Basin Scenario: Preliminary Proposed with Offsite Node: Pond 1 Hydrograph Method: NRCS Unit Hydrograph Infiltration Method: Curve Number 12/18/2024 Page 30 of 82 Swindley Forest Proposed Conditions 2 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Time of Concentration: 21.2000 min Max Allowable Q: 999.00 cfs Time Shift: 0.0000 hr Unit Hydrograph: UH484 Peaking Factor: 484.0 Area: 3.0400 ac Curve Number: 87.0 Ia/S: 0.00 % Impervious: 0.00 % DCIA: 0.00 % Direct: 0.00 Rainfall Name: Comment: Drop Structure Link: Pond 1 Outlet Scenario: Preliminary Proposed with Offsite From Node: Pond 1 To Node: Outlet 1 Link Count: 1 Pipe Flow Direction: Positive Solution: Combine Increments: 0 Pipe Count: 1 Damping: 0.0000 ft Length: 133.00 ft FHWA Code: 0 Entr Loss Coef: 0 Exit Loss Coef: 1 Bend Loss Coef: 0 Bend Location: 0.00 dec Energy Switch: Energy Upstream Pipe Downstream Pipe Invert: 818.00 ft Invert: 815.00 ft Manning's N: 0.0130 Manning's N: 0.0130 Geometry: Circular Geometry: Circular Max Depth: 1.00 ft Max Depth: 1.00 ft Bottom Clip Default: 0.00 ft Default: 0.00 ft Op Table: Op Table: Ref Node: Ref Node: Manning's N: 0.0000 Manning's N: 0.0000 Top Clip Default: 0.00 ft Default: 0.00 ft Op Table: Op Table: Ref Node: Ref Node: Manning's N: 0.0000 Manning's N: 0.0000 Pipe Comment: Weir Component Weir: 1 Weir Count: 1 Weir Flow Direction: Both Damping: 0.0000 ft Weir Type: Sharp Crested Vertical Geometry Type: Circular Invert: 820.00 ft Control Elevation: 820.00 ft Max Depth: 0.22 ft Bottom Clip Default: 0.00 ft Op Table: Ref Node: Top Clip Default: 0.00 ft Op Table: Ref Node: Discharge Coefficients Weir Default: 3.200 Weir Table: 12/18/2024 Page 31 of 82 Swindley Forest Proposed Conditions 3 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Orifice Default: 0.600 Orifice Table: Weir Comment: Weir Component Weir: 2 Weir Count: 1 Weir Flow Direction: Both Damping: 0.0000 ft Weir Type: Sharp Crested Vertical Geometry Type: Circular Invert: 823.60 ft Control Elevation: 823.60 ft Max Depth: 0.45 ft Bottom Clip Default: 0.00 ft Op Table: Ref Node: Top Clip Default: 0.00 ft Op Table: Ref Node: Discharge Coefficients Weir Default: 3.200 Weir Table: Orifice Default: 0.600 Orifice Table: Weir Comment: Weir Component Weir: 3 Weir Count: 1 Weir Flow Direction: Both Damping: 0.0000 ft Weir Type: Horizontal Geometry Type: Circular Invert: 824.70 ft Control Elevation: 824.70 ft Max Depth: 1.00 ft Bottom Clip Default: 0.00 ft Op Table: Ref Node: Top Clip Default: 0.00 ft Op Table: Ref Node: Discharge Coefficients Weir Default: 3.200 Weir Table: Orifice Default: 0.600 Orifice Table: Weir Comment: Drop Structure Comment: Node: Outlet 1 Scenario: Preliminary Proposed with Offsite Type: Time/Stage Base Flow: 0.00 cfs Initial Stage: 815.00 ft Warning Stage: 824.00 ft Alert Stage: 824.00 ft 12/18/2024 Page 32 of 82 Swindley Forest Proposed Conditions 4 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Boundary Stage: Year Month Day Hour Stage [ft] 0 0 0 0.0000 815.00 0 0 0 12.0000 824.00 0 0 0 48.0000 815.00 Comment: Node: Pond 1 Scenario: Preliminary Proposed with Offsite Type: Stage/Area Base Flow: 0.00 cfs Initial Stage: 820.00 ft Warning Stage: 825.00 ft Alert Stage: 826.00 ft Stage [ft] Area [ac] Area [ft2] 820.00 0.0000 0 821.00 0.1300 5663 822.00 0.1800 7841 823.00 0.2200 9583 824.00 0.2800 12197 825.00 0.3400 14810 826.00 0.4000 17424 Comment: Simulation: 002yr Scenario: Preliminary Proposed with Offsite Run Date/Time: 12/16/2024 10:16:14 AM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 12/18/2024 Page 33 of 82 Swindley Forest Proposed Conditions 5 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Restart File Save Restart: False Resources & Lookup Tables Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 2.66 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy Comment: 12/18/2024 Page 34 of 82 Swindley Forest Proposed Conditions 6 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Simulation: 010yr Scenario: Preliminary Proposed with Offsite Run Date/Time: 12/16/2024 10:16:24 AM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Restart File Save Restart: False Resources & Lookup Tables Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft 12/18/2024 Page 35 of 82 Swindley Forest Proposed Conditions 7 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 3.83 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy Comment: Simulation: 100yr Scenario: Preliminary Proposed with Offsite Run Date/Time: 12/16/2024 10:16:33 AM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Restart File Save Restart: False Resources & Lookup Tables 12/18/2024 Page 36 of 82 Swindley Forest Proposed Conditions 8 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 6.46 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy Comment: Simple Basin : Multi Item | (name, sim) : Runoff Summary [Preliminary Proposed with Offsite] Basin Name Sim Name Max Flow [cfs] Time to Max Flow [hrs] Total Rainfall [in] Total Runoff [in] Area [ac] Pond 1 Offsite Basin 002yr 0.33 12.0833 2.66 0.53 0.5900 Pond 1 Offsite Basin 010yr 0.85 12.0833 3.83 1.22 0.5900 Pond 1 Offsite Basin 100yr 2.27 12.0667 6.46 3.18 0.5900 Pond 1 Onsite Basin 002yr 4.52 12.1333 2.66 1.45 3.0400 Pond 1 Onsite Basin 010yr 7.68 12.1167 3.83 2.49 3.0400 Pond 1 Onsite Basin 100yr 14.95 12.1167 6.46 4.97 3.0400 12/18/2024 Page 37 of 82 0.33 0.85 2.27 Swindley Forest Proposed Conditions 9 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Link Min/Max Conditions with Times : Multi Item | (name, sim) [Preliminary Proposed with Offsite] Link Name Sim Name Max Flow [cfs] Min Flow [cfs] Min/Max Delta Flow [cfs] Max Us Velocity [fps] Max Ds Velocity [fps] Time to Max Flow [hrs] Time to Min Flow [hrs] Time to Min/Max Delta Flow [hrs] Time to Max Us Velocity [hrs] Time to Max Ds Velocity [hrs] Pond 1 Outlet - Pipe 002yr 0.27 -0.56 0.25 0.00 0.00 27.6124 12.0003 12.1329 0.0000 0.0000 Pond 1 Outlet - Weir: 1 002yr 0.27 -0.28 -0.25 0.00 0.00 27.6124 11.7601 10.5972 0.0000 0.0000 Pond 1 Outlet - Weir: 2 002yr 0.00 -0.29 0.25 0.00 0.00 0.0000 12.0003 12.1329 0.0000 0.0000 Pond 1 Outlet - Weir: 3 002yr 0.00 0.00 0.00 0.00 0.00 0.0000 0.0000 0.0000 0.0000 0.0000 Pond 1 Outlet - Pipe 010yr 0.31 -0.51 -0.26 0.00 0.00 27.6260 11.9596 12.0526 0.0000 0.0000 Pond 1 Outlet - Weir: 1 010yr 0.31 -0.27 -0.25 0.00 0.00 27.6183 11.6534 10.8940 0.0000 0.0000 Pond 1 Outlet - Weir: 2 010yr 0.10 -0.27 -0.27 1.36 1.36 16.6050 12.0526 12.0526 16.6050 16.6050 Pond 1 Outlet - Weir: 3 010yr 0.00 0.00 0.00 0.00 0.00 0.0000 0.0000 0.0000 0.0000 0.0000 Pond 1 Outlet - Pipe 100yr 1.80 -0.45 -0.23 0.00 0.00 13.0555 12.0033 12.0017 0.0000 0.0000 Pond 1 Outlet - Weir: 1 100yr 0.32 -0.23 -0.18 0.00 0.00 27.6235 11.4736 9.3619 0.0000 0.0000 Pond 1 Outlet - Weir: 2 100yr 0.77 -0.29 -0.29 4.85 4.85 13.8668 12.0017 12.0017 13.8668 13.8668 Pond 1 Outlet - Weir: 3 100yr 1.00 0.00 -0.01 1.48 1.48 13.0159 0.0000 13.4762 13.0159 13.0159 Node Max Conditions w/ Times : Multi Item | (name, sim) [Preliminary Proposed with Offsite] Node Name Sim Name Warnin g Stage [ft] Alert Stage [ft] Max Stage [ft] Min/Ma x Delta Stage Max Total Inflow Max Total Outflow Max Surface Area Time to Max Stage Time to Min/Ma Time to Max Total Time to Max Total 12/18/2024 Page 38 of 82 Swindley Forest Proposed Conditions 10 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Node Name Sim Name Warnin g Stage [ft] Alert Stage [ft] Max Stage [ft] Min/Ma x Delta Stage [ft] Max Total Inflow [cfs] Max Total Outflow [cfs] Max Surface Area [ft2] Time to Max Stage [hr] Time to Min/Ma x Delta Stage [hr] Time to Max Total Inflow [hr] Time to Max Total Outflow [hr] Outlet 1 002yr 824.00 824.00 824.00 0.0125 0.27 0.56 0 12.000 3 1.4605 27.612 4 12.000 3 Outlet 1 010yr 824.00 824.00 824.00 0.0125 0.31 0.51 0 12.000 1 1.4605 27.626 0 11.959 6 Outlet 1 100yr 824.00 824.00 824.00 0.0125 1.80 0.45 0 12.000 0 1.4605 13.055 5 12.003 3 Pond 1 002yr 825.00 826.00 823.12 0.0010 5.35 0.27 9889 17.995 3 11.970 4 12.116 8 27.612 4 Pond 1 010yr 825.00 826.00 823.82 0.0010 8.96 0.31 11723 16.605 0 11.972 5 12.116 7 27.626 0 Pond 1 100yr 825.00 826.00 824.91 -0.0010 17.40 1.80 14587 13.015 9 14.772 8 12.103 1 13.055 5 Background Image: Proposed without Offsite Simple Basin : Multi Item | (name, sim) : Runoff Summary [Preliminary Proposed without Offsite] Basin Name Sim Name Max Flow [cfs] Time to Max Flow [hrs] Total Rainfall [in] Total Runoff [in] Area [ac] Pond 1 Onsite Basin 002yr 4.08 12.1333 2.66 1.31 3.0400 Pond 1 Onsite Basin 010yr 7.18 12.1333 3.83 2.31 3.0400 Pond 1 Onsite Basin 100yr 14.43 12.1167 6.46 4.75 3.0400 12/18/2024 Page 39 of 82 823.12 823.82 824.91 0.27 0.31 1.80 Swindley Forest Proposed Conditions 11 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Link Min/Max Conditions with Times : Multi Item | (name, sim) [Preliminary Proposed without Offsite] Link Name Sim Name Max Flow [cfs] Min Flow [cfs] Min/Max Delta Flow [cfs] Max Us Velocity [fps] Max Ds Velocity [fps] Time to Max Flow [hrs] Time to Min Flow [hrs] Time to Min/Max Delta Flow [hrs] Time to Max Us Velocity [hrs] Time to Max Ds Velocity [hrs] Pond 1 Outlet - Pipe 002yr 0.26 -0.57 0.25 0.00 0.00 27.6199 12.0006 12.1871 0.0000 0.0000 Pond 1 Outlet - Weir: 1 002yr 0.26 -0.28 -0.25 0.00 0.00 27.6111 11.7900 10.5407 0.0000 0.0000 Pond 1 Outlet - Weir: 2 002yr 0.00 -0.29 0.24 0.00 0.00 0.0000 12.0001 12.1871 0.0000 0.0000 Pond 1 Outlet - Pipe 010yr 0.30 -0.54 0.27 0.00 0.00 27.6240 12.0002 12.0203 0.0000 0.0000 Pond 1 Outlet - Weir: 1 010yr 0.30 -0.27 -0.25 0.00 0.00 27.6240 11.6770 10.7674 0.0000 0.0000 Pond 1 Outlet - Weir: 2 010yr 0.00 -0.29 0.28 0.00 0.00 17.9682 12.0002 12.0203 0.0000 0.0000 Pond 1 Outlet - Pipe 100yr 0.89 -0.48 0.23 0.00 0.00 14.2406 12.0001 12.0305 0.0000 0.0000 Pond 1 Outlet - Weir: 1 100yr 0.32 -0.23 0.18 0.00 0.00 27.6282 11.5478 12.0305 0.0000 0.0000 Pond 1 Outlet - Weir: 2 100yr 0.71 -0.29 0.28 4.44 4.44 13.8160 12.0001 12.0305 13.8160 13.8160 Node Max Conditions w/ Times : Multi Item | (name, sim) [Preliminary Proposed without Offsite] Node Name Sim Name Warnin g Stage [ft] Alert Stage [ft] Max Stage [ft] Min/Ma x Delta Stage [ft] Max Total Inflow [cfs] Max Total Outflow [cfs] Max Surface Area [ft2] Time to Max Stage [hr] Time to Min/Ma x Delta Stage [hr] Time to Max Total Inflow [hr] Time to Max Total Outflow [hr] Outlet 1 002yr 824.00 824.00 824.00 0.0125 0.26 0.57 0 12.000 1 1.4605 27.619 9 12.000 6 Outlet 1 010yr 824.00 824.00 824.00 0.0125 0.30 0.54 0 12.000 2 1.4605 27.624 0 12.000 2 Outlet 1 100yr 824.00 824.00 824.00 0.0125 0.89 0.48 0 12.000 1 1.4605 14.240 6 12.000 1 12/18/2024 Page 40 of 82 Swindley Forest Proposed Conditions 12 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:18 Node Name Sim Name Warnin g Stage [ft] Alert Stage [ft] Max Stage [ft] Min/Ma x Delta Stage [ft] Max Total Inflow [cfs] Max Total Outflow [cfs] Max Surface Area [ft2] Time to Max Stage [hr] Time to Min/Ma x Delta Stage [hr] Time to Max Total Inflow [hr] Time to Max Total Outflow [hr] Pond 1 002yr 825.00 826.00 822.94 0.0010 4.59 0.26 9480 18.020 1 8.3997 12.133 0 27.619 9 Pond 1 010yr 825.00 826.00 823.64 -0.0010 7.66 0.30 11253 17.968 2 47.406 3 12.116 9 27.624 0 Pond 1 100yr 825.00 826.00 824.68 -0.0010 14.82 0.89 13969 13.816 0 16.533 4 12.116 7 14.240 6 12/18/2024 Page 41 of 82 0.89 0.30 0.26 824.68 823.64 822.94 Swindley Forest Proposed Conditions Minimum Orifice Report 1 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Background Image: Proposed with Offsite Simple Basin: Pond 1 Offsite Basin Scenario: Preliminary Proposed with Offsite Minimum Orifice Node: Pond 1 Hydrograph Method: NRCS Unit Hydrograph Infiltration Method: Curve Number Time of Concentration: 14.7000 min Max Allowable Q: 999.00 cfs Time Shift: 0.0000 hr Unit Hydrograph: UH484 Peaking Factor: 484.0 Area: 0.5900 ac Curve Number: 70.0 Ia/S: 0.00 % Impervious: 0.00 % DCIA: 0.00 % Direct: 0.00 Rainfall Name: Comment: Simple Basin: Pond 1 Onsite Basin Scenario: Preliminary Proposed with Offsite Minimum Orifice Node: Pond 1 12/18/2024 Page 42 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 2 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Hydrograph Method: NRCS Unit Hydrograph Infiltration Method: Curve Number Time of Concentration: 21.2000 min Max Allowable Q: 999.00 cfs Time Shift: 0.0000 hr Unit Hydrograph: UH484 Peaking Factor: 484.0 Area: 3.0400 ac Curve Number: 87.0 Ia/S: 0.00 % Impervious: 0.00 % DCIA: 0.00 % Direct: 0.00 Rainfall Name: Comment: Drop Structure Link: Pond 1 Outlet Scenario: Preliminary Proposed with Offsite Minimum Orifice From Node: Pond 1 To Node: Outlet 1 Link Count: 1 Pipe Flow Direction: Positive Solution: Combine Increments: 0 Pipe Count: 1 Damping: 0.0000 ft Length: 133.00 ft FHWA Code: 0 Entr Loss Coef: 0 Exit Loss Coef: 1 Bend Loss Coef: 0 Bend Location: 0.00 dec Energy Switch: Energy Upstream Pipe Downstream Pipe Invert: 818.00 ft Invert: 815.00 ft Manning's N: 0.0130 Manning's N: 0.0130 Geometry: Circular Geometry: Circular Max Depth: 1.00 ft Max Depth: 1.00 ft Bottom Clip Default: 0.00 ft Default: 0.00 ft Op Table: Op Table: Ref Node: Ref Node: Manning's N: 0.0000 Manning's N: 0.0000 Top Clip Default: 0.00 ft Default: 0.00 ft Op Table: Op Table: Ref Node: Ref Node: Manning's N: 0.0000 Manning's N: 0.0000 Pipe Comment: Weir Component Weir: 1 Weir Count: 1 Weir Flow Direction: Both Damping: 0.0000 ft Weir Type: Sharp Crested Vertical Geometry Type: Circular Invert: 820.00 ft Control Elevation: 820.00 ft Bottom Clip Default: 0.00 ft Op Table: Ref Node: Top Clip Default: 0.00 ft Op Table: Ref Node: 12/18/2024 Page 43 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 3 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Max Depth: 0.50 ft Discharge Coefficients Weir Default: 3.200 Weir Table: Orifice Default: 0.600 Orifice Table: Weir Comment: Weir Component Weir: 2 Weir Count: 1 Weir Flow Direction: Both Damping: 0.0000 ft Weir Type: Horizontal Geometry Type: Circular Invert: 824.65 ft Control Elevation: 824.65 ft Max Depth: 1.00 ft Bottom Clip Default: 0.00 ft Op Table: Ref Node: Top Clip Default: 0.00 ft Op Table: Ref Node: Discharge Coefficients Weir Default: 3.200 Weir Table: Orifice Default: 0.600 Orifice Table: Weir Comment: Drop Structure Comment: Node: Outlet 1 Scenario: Preliminary Proposed with Offsite Minimum Orifice Type: Time/Stage Base Flow: 0.00 cfs Initial Stage: 815.00 ft Warning Stage: 824.00 ft Alert Stage: 824.00 ft Boundary Stage: Year Month Day Hour Stage [ft] 0 0 0 0.0000 815.00 0 0 0 12.0000 824.00 0 0 0 48.0000 815.00 Comment: Node: Pond 1 Scenario: Preliminary Proposed with 12/18/2024 Page 44 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 4 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Offsite Minimum Orifice Type: Stage/Area Base Flow: 0.00 cfs Initial Stage: 820.00 ft Warning Stage: 825.00 ft Alert Stage: 826.00 ft Stage [ft] Area [ac] Area [ft2] 820.00 0.0000 0 821.00 0.1300 5663 822.00 0.1800 7841 823.00 0.2200 9583 824.00 0.2800 12197 825.00 0.3400 14810 826.00 0.4000 17424 Comment: Simulation: 002yr Scenario: Preliminary Proposed with Offsite Minimum Orifice Run Date/Time: 12/16/2024 10:47:34 AM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 12/18/2024 Page 45 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 5 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Restart File Save Restart: False Resources & Lookup Tables Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 2.66 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy Comment: Simulation: 010yr Scenario: Preliminary Proposed with Offsite Minimum Orifice Run Date/Time: 12/16/2024 10:47:43 AM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 12/18/2024 Page 46 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 6 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Restart File Save Restart: False Resources & Lookup Tables Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 3.83 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy Comment: 12/18/2024 Page 47 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 7 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Simulation: 100yr Scenario: Preliminary Proposed with Offsite Minimum Orifice Run Date/Time: 12/16/2024 10:47:52 AM Program Version: StormWise 4.08.02 General Run Mode: Normal Year Month Day Hour [hr] Start Time: 0 0 0 0.0000 End Time: 0 0 0 48.0000 Hydrology [sec] Surface Hydraulics [sec] Min Calculation Time: 60.0000 0.1000 Max Calculation Time: 60.0000 Output Time Increments Hydrology Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Surface Hydraulics Year Month Day Hour [hr] Time Increment [min] 0 0 0 0.0000 5.0000 Restart File Save Restart: False Resources & Lookup Tables Resources Lookup Tables Rainfall Folder: ICPR3 Boundary Stage Set: Extern Hydrograph Set: Unit Hydrograph Folder: ICPR3 Curve Number Set: Green-Ampt Set: Vertical Layers Set: Impervious Set: Tolerances & Options 12/18/2024 Page 48 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 8 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Time Marching: SAOR IA Recovery Time: 24.0000 hr Max Iterations: 6 Over-Relax Weight Fact: 0.5 dec Ia/S: 0.20 dec dZ Tolerance: 0.0010 ft Max dZ: 1.0000 ft Smp/Man Basin Rain Opt: Global Link Optimizer Tol: 0.0001 ft Rainfall Name: ~SCSII-24 Rainfall Amount: 6.46 in Storm Duration: 24.0000 hr Dflt Damping (1D): 0.0050 ft Min Node Srf Area (1D): 113 ft2 Energy Switch (1D): Energy Comment: Simple Basin : Multi Item | (name, sim) : Runoff Summary [Preliminary Proposed with Offsite Minimum Orifice] Basin Name Sim Name Max Flow [cfs] Time to Max Flow [hrs] Total Rainfall [in] Total Runoff [in] Area [ac] Pond 1 Offsite Basin 002yr 0.33 12.0833 2.66 0.53 0.5900 Pond 1 Offsite Basin 010yr 0.85 12.0833 3.83 1.22 0.5900 Pond 1 Offsite Basin 100yr 2.27 12.0667 6.46 3.18 0.5900 Pond 1 Onsite Basin 002yr 4.52 12.1333 2.66 1.45 3.0400 Pond 1 Onsite Basin 010yr 7.68 12.1167 3.83 2.49 3.0400 Pond 1 Onsite Basin 100yr 14.95 12.1167 6.46 4.97 3.0400 Link Min/Max Conditions with Times : Multi Item | (name, sim) [Preliminary Proposed with Offsite Minimum Orifice] Link Name Sim Name Max Flow [cfs] Min Flow [cfs] Min/Max Delta Flow [cfs] Max Us Velocity [fps] Max Ds Velocity [fps] Time to Max Flow [hrs] Time to Min Flow [hrs] Time to Min/Max Delta Flow [hrs] Time to Max Us Velocity [hrs] Time to Max Ds Velocity [hrs] Pond 1 Outlet - Pipe 002yr 0.60 -0.48 0.24 0.00 0.00 22.9120 7.6825 7.6842 0.0000 0.0000 Pond 1 002yr 0.60 -0.48 0.48 3.04 3.04 22.9086 7.6825 7.6842 22.9086 22.9086 12/18/2024 Page 49 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 9 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Link Name Sim Name Max Flow [cfs] Min Flow [cfs] Min/Max Delta Flow [cfs] Max Us Velocity [fps] Max Ds Velocity [fps] Time to Max Flow [hrs] Time to Min Flow [hrs] Time to Min/Max Delta Flow [hrs] Time to Max Us Velocity [hrs] Time to Max Ds Velocity [hrs] Outlet - Weir: 1 Pond 1 Outlet - Weir: 2 002yr 0.00 0.00 0.00 0.00 0.00 0.0000 0.0000 0.0000 0.0000 0.0000 Pond 1 Outlet - Pipe 010yr 0.76 -0.45 -0.24 0.00 0.00 20.6307 7.6377 7.6826 0.0000 0.0000 Pond 1 Outlet - Weir: 1 010yr 0.76 -0.48 0.48 3.87 3.87 20.6274 7.6826 7.6845 20.6274 20.6274 Pond 1 Outlet - Weir: 2 010yr 0.00 0.00 0.00 0.00 0.00 0.0000 0.0000 0.0000 0.0000 0.0000 Pond 1 Outlet - Pipe 100yr 1.47 -0.33 0.17 0.00 0.00 13.3574 7.4948 7.4964 0.0000 0.0000 Pond 1 Outlet - Weir: 1 100yr 1.16 -0.33 0.33 5.89 5.89 19.5284 7.4948 7.4964 19.5284 19.5284 Pond 1 Outlet - Weir: 2 100yr 0.60 0.00 -0.01 1.25 1.25 13.2569 0.0000 13.7674 13.2569 13.2569 Node Max Conditions w/ Times : Multi Item | (name, sim) [Preliminary Proposed with Offsite Minimum Orifice] Node Name Sim Name Warnin g Stage [ft] Alert Stage [ft] Max Stage [ft] Min/Ma x Delta Stage [ft] Max Total Inflow [cfs] Max Total Outflow [cfs] Max Surface Area [ft2] Time to Max Stage [hr] Time to Min/Ma x Delta Stage [hr] Time to Max Total Inflow [hr] Time to Max Total Outflow [hr] Outlet 1 002yr 824.00 824.00 824.00 0.0125 0.60 0.48 0 12.000 0 1.4605 22.912 0 7.6825 Outlet 1 010yr 824.00 824.00 824.00 0.0125 0.76 0.45 0 12.000 1 1.4605 20.630 7 7.6377 Outlet 1 100yr 824.00 824.00 824.00 0.0125 1.47 0.33 0 12.000 0 1.4605 13.357 4 7.4948 Pond 1 002yr 825.00 826.00 822.67 -0.0010 4.83 0.60 9010 17.451 3 26.377 6 12.117 0 22.912 0 Pond 1 010yr 825.00 826.00 823.49 0.0010 8.49 0.76 10854 14.725 1 11.901 8 12.116 8 20.630 7 Pond 1 100yr 825.00 826.00 824.80 0.0010 17.06 1.47 14297 13.256 11.156 12.116 13.357 12/18/2024 Page 50 of 82 824.80 823.49 822.67 0.60 0.76 1.47 Swindley Forest Proposed Conditions Minimum Orifice Report 10 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Node Name Sim Name Warnin g Stage [ft] Alert Stage [ft] Max Stage [ft] Min/Ma x Delta Stage [ft] Max Total Inflow [cfs] Max Total Outflow [cfs] Max Surface Area [ft2] Time to Max Stage [hr] Time to Min/Ma x Delta Stage [hr] Time to Max Total Inflow [hr] Time to Max Total Outflow [hr] 9964 Background Image: Proposed without Offsite Simple Basin : Multi Item | (name, sim) : Runoff Summary [Preliminary Proposed without Offsite Minimum Orifice] Basin Name Sim Name Max Flow [cfs] Time to Max Flow [hrs] Total Rainfall [in] Total Runoff [in] Area [ac] Pond 1 Onsite Basin 002yr 4.52 12.1333 2.66 1.45 3.0400 Pond 1 Onsite Basin 010yr 7.68 12.1167 3.83 2.49 3.0400 Pond 1 Onsite Basin 100yr 14.95 12.1167 6.46 4.97 3.0400 Link Min/Max Conditions with Times : Multi Item | (name, sim) [Preliminary Proposed without Offsite Minimum Orifice] Link Name Sim Name Max Flow [cfs] Min Flow [cfs] Min/Max Delta Flow [cfs] Max Us Velocity [fps] Max Ds Velocity [fps] Time to Max Flow [hrs] Time to Min Flow [hrs] Time to Min/Max Delta Flow [hrs] Time to Max Us Velocity [hrs] Time to Max Ds Velocity [hrs] Pond 1 Outlet - 002yr 0.58 -0.48 0.24 0.00 0.00 23.0623 7.6825 7.6842 0.0000 0.0000 12/18/2024 Page 51 of 82 Swindley Forest Proposed Conditions Minimum Orifice Report 11 C:\Users\nstevens\Desktop\ICPR Files\ICPR Project Folders\111895GBC ICPR\12/16/2024 10:52 Link Name Sim Name Max Flow [cfs] Min Flow [cfs] Min/Max Delta Flow [cfs] Max Us Velocity [fps] Max Ds Velocity [fps] Time to Max Flow [hrs] Time to Min Flow [hrs] Time to Min/Max Delta Flow [hrs] Time to Max Us Velocity [hrs] Time to Max Ds Velocity [hrs] Pipe Pond 1 Outlet - Weir: 1 002yr 0.58 -0.48 0.48 2.95 2.95 23.0586 7.6825 7.6842 23.0586 23.0586 Pond 1 Outlet - Pipe 010yr 0.72 -0.45 -0.24 0.00 0.00 20.9155 7.6377 7.6826 0.0000 0.0000 Pond 1 Outlet - Weir: 1 010yr 0.72 -0.48 0.48 3.67 3.67 20.9122 7.6826 7.6845 20.9122 20.9122 Pond 1 Outlet - Pipe 100yr 1.10 -0.33 0.17 0.00 0.00 19.1064 7.4948 7.4964 0.0000 0.0000 Pond 1 Outlet - Weir: 1 100yr 1.10 -0.33 0.33 5.59 5.59 19.1025 7.4948 7.4964 19.1025 19.1025 Node Max Conditions w/ Times : Multi Item | (name, sim) [Preliminary Proposed without Offsite Minimum Orifice] Node Name Sim Name Warnin g Stage [ft] Alert Stage [ft] Max Stage [ft] Min/Ma x Delta Stage [ft] Max Total Inflow [cfs] Max Total Outflow [cfs] Max Surface Area [ft2] Time to Max Stage [hr] Time to Min/Ma x Delta Stage [hr] Time to Max Total Inflow [hr] Time to Max Total Outflow [hr] Outlet 1 002yr 824.00 824.00 824.00 0.0125 0.58 0.48 0 12.000 2 1.4605 23.062 3 7.6825 Outlet 1 010yr 824.00 824.00 824.00 0.0125 0.72 0.45 0 12.000 1 1.4605 20.915 5 7.6377 Outlet 1 100yr 824.00 824.00 824.00 0.0125 1.10 0.33 0 12.000 0 1.4605 19.106 4 7.4948 Pond 1 002yr 825.00 826.00 822.59 -0.0010 4.52 0.58 8867 17.755 4 23.780 7 12.133 3 23.062 3 Pond 1 010yr 825.00 826.00 823.36 -0.0010 7.68 0.72 10535 15.002 5 16.993 9 12.116 7 20.915 5 Pond 1 100yr 825.00 826.00 824.62 0.0010 14.95 1.10 13806 13.781 5 12.058 4 12.116 7 19.106 4 12/18/2024 Page 52 of 82 1.10 0.72 0.58 APPENDIX C STORM SEWER DESIGN CALCULATIONS 12/18/2024 Page 53 of 82 7L P H R I & R Q F H Q W U D W L R Q V -R E * % & 3L S H 6 L ] L Q J % D V L Q V 3R V W ' H Y H O R S H G 6 L W H 'H V F U L S W L R Q Q / 3 V 7W Q / 3 V 'H V F U L S W L R Q V 9 / 7 W / 9 7F W R W D O 7F W R W D O I W L Q I W I W K U V 3 D Y H G 8 Q S D Y H G I W I W I W V I W K U V K U V P L Q ' H Q V H * U D V V H V 3 D Y H G ' H Q V H * U D V V H V 3 D Y H G ' H Q V H * U D V V H V 3 D Y H G ' H Q V H * U D V V H V 3 D Y H G 'U \ % D V L Q ' H Q V H * U D V V H V 3 D Y H G 2I I V L W H W R ' H Q V H * U D V V H V 3 D Y H G 6Z L Q G O H \ ) R U H V W %D V L Q 6K H H W ) O R Z 0D Q X D O / 9 12/18/2024 Page 54 of 82 6Z L Q G O H \ ) R U H V W 5X Q R I I & R H I I L F L H Q W V -R E * % & :H L J K W H G & X U Y H 1 X P E H U V CN w= 7R W D O 'U D L Q D J H $U H D 7R W D O ,P S H U Y L R X V $ U H D $LP S 7R W D O ,P S H U Y L R X V $U H D $ LP S 7R W D O 3H U Y L R X V $U H D $ SH U 7R W D O $J U L F X O W X U D O $U H D $ DJ 6X E % D V L Q :H L J K W H G & ) D F W R U DF VT I W DF DF DF &Z 'U \ % D V L Q 2I I V L W H W R 3R V W ' H Y H O R SHG 6 L W H Cw = 0. 8 5 A im p + 0 . 1 6 A pe r + 0 . 5 A a g 9 8 A im p + Tot a l D r a i n a g e A r e a Tot a l D r a i n 6W U X F W X U H 12/18/2024 Page 55 of 82 Project Description 111895SSA.SPF Project Options CFS Elevation Rational User-Defined Steady Flow YES NO Analysis Options Dec 13, 2024 00:00:00 Dec 14, 2024 00:00:00 Dec 13, 2024 00:00:00 0 days 0 01:00:00 days hh:mm:ss 0 00:05:00 days hh:mm:ss 0 00:05:00 days hh:mm:ss 30 seconds Number of Elements Qty 0 6 8 6 1 0 0 1 7 0 6 0 1 0 0 0 0 Rainfall Details 10 year(s) Outlets .......................................................................... Pollutants .............................................................................. Land Uses ............................................................................ Return Period........................................................................ Links...................................................................................... Channels ...................................................................... Pipes ............................................................................ Pumps .......................................................................... Orifices ......................................................................... Weirs ............................................................................ Nodes.................................................................................... Junctions ...................................................................... Outfalls ......................................................................... Flow Diversions ........................................................... Inlets ............................................................................ Storage Nodes ............................................................. Runoff (Dry Weather) Time Step .......................................... Runoff (Wet Weather) Time Step ........................................ Reporting Time Step ............................................................ Routing Time Step ................................................................ Rain Gages ........................................................................... Subbasins.............................................................................. Enable Overflow Ponding at Nodes ...................................... Skip Steady State Analysis Time Periods ............................ Start Analysis On .................................................................. End Analysis On ................................................................... Start Reporting On ................................................................ Antecedent Dry Days ............................................................ File Name ............................................................................. Flow Units ............................................................................. Elevation Type ...................................................................... Hydrology Method ................................................................. Time of Concentration (TOC) Method .................................. Link Routing Method ............................................................. 12/18/2024 Page 56 of 82 Subbasin Summary SN Subbasin Area Weighted Total Total Total Peak Time of ID Runoff Rainfall Runoff Runoff Runoff Concentration Coefficient Volume (ac) (in) (in) (ac-in) (cfs) (days hh:mm:ss) 1 Sub403 0.45 0.5100 1.30 0.66 0.30 0.94 0 00:19:00 2 Sub404 0.60 0.4500 1.28 0.58 0.35 1.12 0 00:18:30 3 Sub405 0.21 0.4100 1.30 0.53 0.11 0.36 0 00:18:48 4 Sub406 0.92 0.4100 1.25 0.51 0.47 1.60 0 00:17:36 5 SubDryBasin 0.86 0.2600 0.84 0.22 0.19 1.18 0 00:09:30 6 SubOff408 0.59 0.2000 1.08 0.22 0.13 0.55 0 00:13:54 12/18/2024 Page 57 of 82 Node Summary SN Element Element Invert Ground/Rim Initial Surcharge Ponded Peak Max HGL Max Min Time of Total Total Time ID Type Elevation (Max) Water Elevation Area Inflow Elevation Surcharge Freeboard Peak Flooded Flooded Elevation Elevation Attained Depth Attained Flooding Volume Attained Occurrence (ft) (ft) (ft) (ft) (ft²) (cfs) (ft) (ft) (ft) (days hh:mm) (ac-in) (min) 1 401 Junction 818.00 820.00 818.00 820.00 0.00 1.05 818.31 0.00 1.69 0 00:00 0.00 0.00 2 403 Junction 823.10 829.00 823.10 829.00 0.00 3.92 823.71 0.00 5.29 0 00:00 0.00 0.00 3 404 Junction 826.40 830.50 826.40 830.50 0.00 3.01 826.94 0.00 3.56 0 00:00 0.00 0.00 4 405 Junction 829.00 833.10 829.00 833.10 0.00 1.94 829.44 0.00 3.66 0 00:00 0.00 0.00 5 406 Junction 830.60 834.60 830.60 834.60 0.00 1.60 830.94 0.00 3.66 0 00:00 0.00 0.00 6 408 Junction 824.40 828.40 824.40 828.40 0.00 0.55 824.58 0.00 3.82 0 00:00 0.00 0.00 7 Outlet400 Outfall 815.00 1.05 815.31 8 Dry Basin Storage Node 820.00 825.00 820.00 0.00 4.45 821.17 0.00 0.00 12/18/2024 Page 58 of 82 Li n k S u m m a r y SN E l e m e n t E l e m e n t F r o m T o ( O u t l e t ) Le n g t h I n l e t O u t l e t A v e r a g e D i a m e t e r o r M a n n i n g ' s P e a k D e s i g n F l o w P e a k F l o w / P e a k F l o w P e a k F l o w P e a k F l o w T o t a l T i m e R e p o r t e d ID T y p e ( I n l e t ) N o d e I n v e r t I n v e r t S l o p e H e i g h t R o u g h n e s s F l o w C a p a c i t y D e si g n F l o w V e l o c i t y D e p t h D e p t h / S u r c h a r g e d C o n d i t i o n No d e E l e v a t i o n E l e v a t i o n R a t i o T o t a l D e p t h Ra t i o (f t ) ( f t ) ( f t ) ( % ) ( i n ) ( c f s ) ( c f s ) ( f t / s e c ) ( f t ) ( m i n ) 1 4 0 0 - 4 0 1 P i p e 4 0 1 O u t l e t 4 0 0 1 4 6 . 0 0 8 1 8 . 0 0 8 1 5 . 0 0 2 . 0 5 0 0 1 2 . 0 0 0 0 . 0 1 3 0 1 . 0 5 5 . 1 1 0 . 2 0 5 . 1 1 0 . 3 1 0 . 3 1 0 . 0 0 C a l c u l a t e d 2 4 0 2 - 4 0 3 P i p e 4 0 3 D r y B a s i n 5 4 . 0 4 8 2 3 . 1 0 8 2 1 . 0 0 3 . 8 9 0 0 1 2 . 0 0 0 0 . 0 1 2 0 3 . 9 2 7. 6 1 0 . 5 1 9 . 7 6 0 . 5 1 0 . 5 1 0 . 0 0 C a l c u l a t e d 3 4 0 3 - 4 0 4 P i p e 4 0 4 4 0 3 1 4 0 . 0 0 8 2 6 . 4 0 8 2 3 . 2 0 2 . 2 9 0 0 1 2 . 0 0 0 0 . 0 1 2 0 3 . 0 1 5 . 8 4 0 .5 2 7 . 4 8 0 . 5 1 0 . 5 1 0 . 0 0 C a l c u l a t e d 4 4 0 4 - 4 0 5 P i p e 4 0 5 4 0 4 1 6 0 . 0 0 8 2 9 . 0 0 8 2 6 . 5 0 1 . 5 6 0 0 1 2 . 0 0 0 0 . 0 1 2 0 1 . 9 4 4 . 8 2 0 .4 0 5 . 8 1 0 . 4 4 0 . 4 4 0 . 0 0 C a l c u l a t e d 5 4 0 5 - 4 0 6 P i p e 4 0 6 4 0 5 5 6 . 0 0 8 3 0 . 6 0 8 2 9 . 1 0 2 . 6 8 0 0 1 2 . 0 0 0 0 . 0 1 2 0 1 . 6 0 6 . 3 2 0 . 25 6 . 7 1 0 . 3 4 0 . 3 4 0 . 0 0 C a l c u l a t e d 6 4 0 7 - 4 0 8 P i p e 4 0 8 D r y B a s i n 9 1 . 2 2 8 2 4 . 4 0 8 2 1 . 0 0 3 . 7 3 0 0 1 2 . 0 0 0 0 . 0 1 2 0 0 . 5 5 7. 4 5 0 . 0 7 5 . 5 6 0 . 1 8 0 . 1 8 0 . 0 0 C a l c u l a t e d 7 D r y P o n d O u t l e t O r i f i c e D r y B a s i n 4 0 1 8 2 0 . 0 0 8 1 8 . 0 0 6 . 0 0 0 1 . 0 5 12/18/2024 Page 59 of 82 Junction Input SN Element Invert Ground/Rim Ground/Rim Initial Initial Surcharge Surcharge Ponded Minimum ID Elevation (Max) (Max) Water Water Elevation Depth Area Pipe Elevation Offset Elevation Depth Cover (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft²) (ft) 1 401 818.00 820.00 2.00 818.00 0.00 820.00 0.00 0.00 0.00 2 403 823.10 829.00 5.90 823.10 0.00 829.00 0.00 0.00 4.80 3 404 826.40 830.50 4.10 826.40 0.00 830.50 0.00 0.00 3.00 4 405 829.00 833.10 4.10 829.00 0.00 833.10 0.00 0.00 3.00 5 406 830.60 834.60 4.00 830.60 0.00 834.60 0.00 0.00 3.00 6 408 824.40 828.40 4.00 824.40 0.00 828.40 0.00 0.00 3.00 12/18/2024 Page 60 of 82 Junction Results SN Element Peak Peak Max HGL Max HGL Max Min Average HGL Average HGL Time of Time of Total Total Time ID Inflow Lateral Elevation Depth Surcharge Freeboard Elevation Depth Max HGL Peak Flooded Flooded Inflow Attained Attained Depth Attained Attained Attained Occurrence Flooding Volume Attained Occurrence (cfs) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (days hh:mm) (days hh:mm) (ac-in) (min) 1 401 1.05 0.00 818.31 0.31 0.00 1.69 818.02 0.02 0 00:32 0 00:00 0.00 0.00 2 403 3.92 0.94 823.71 0.61 0.00 5.29 823.21 0.11 0 00:17 0 00:00 0.00 0.00 3 404 3.01 1.12 826.94 0.54 0.00 3.56 826.51 0.11 0 00:17 0 00:00 0.00 0.00 4 405 1.94 0.36 829.44 0.44 0.00 3.66 829.11 0.11 0 00:17 0 00:00 0.00 0.00 5 406 1.60 1.60 830.94 0.34 0.00 3.66 830.61 0.01 0 00:17 0 00:00 0.00 0.00 6 408 0.55 0.55 824.58 0.18 0.00 3.82 824.40 0.00 0 00:14 0 00:00 0.00 0.00 12/18/2024 Page 61 of 82 Pipe Input SN Element Length Inlet Inlet Outlet Outlet Total Average Pipe Pipe Pipe Manning's Entrance Exit/Bend Additional Initial Flap No. of ID Invert Invert Invert Invert Drop Slope Shape Diameter or Width Roughness Losses Losses Losses Flow Gate Barrels Elevation Offset Elevation Offset Height (ft) (ft) (ft) (ft) (ft) (ft) (%) (in) (in) (cfs) 1 400-401 146.00 818.00 0.00 815.00 0.00 3.00 2.0500 CIRCULAR 12.000 12.000 0.0130 0.5000 0.5000 0.0000 0.00 No 1 2 402-403 54.04 823.10 0.00 821.00 1.00 2.10 3.8900 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 3 403-404 140.00 826.40 0.00 823.20 0.10 3.20 2.2900 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 4 404-405 160.00 829.00 0.00 826.50 0.10 2.50 1.5600 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 5 405-406 56.00 830.60 0.00 829.10 0.10 1.50 2.6800 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 6 407-408 91.22 824.40 0.00 821.00 1.00 3.40 3.7300 CIRCULAR 12.000 12.000 0.0120 0.5000 0.5000 0.0000 0.00 No 1 12/18/2024 Page 62 of 82 Pipe Results SN Element Peak Time of Design Flow Peak Flow/ Peak Flow Travel Peak Flow Peak Flow Total Time Froude Reported ID Flow Peak Flow Capacity Design Flow Velocity Time Depth Depth/ Surcharged Number Condition Occurrence Ratio Total Depth Ratio (cfs) (days hh:mm) (cfs) (ft/sec) (min) (ft) (min) 1 400-401 1.05 0 00:32 5.11 0.20 5.11 0.48 0.31 0.31 0.00 Calculated 2 402-403 3.92 0 00:18 7.61 0.51 9.76 0.09 0.51 0.51 0.00 Calculated 3 403-404 3.01 0 00:17 5.84 0.52 7.48 0.31 0.51 0.51 0.00 Calculated 4 404-405 1.94 0 00:17 4.82 0.40 5.81 0.46 0.44 0.44 0.00 Calculated 5 405-406 1.60 0 00:17 6.32 0.25 6.71 0.14 0.34 0.34 0.00 Calculated 6 407-408 0.55 0 00:14 7.45 0.07 5.56 0.27 0.18 0.18 0.00 Calculated 12/18/2024 Page 63 of 82 Storage Nodes Storage Node : Dry Basin Input Data 820.00 825.00 5.00 820.00 0.00 0.00 0.00 Storage Area Volume Curves Storage Curve : DryPondSC Stage Storage Storage Area Volume (ft) (ft²) (ft³) 0 0 0.000 1 5755 2877.50 2 7666 9588.00 3 9800 18321.00 4 12161 29301.50 5 14757 42760.50 Evaporation Loss ................................................................... Invert Elevation (ft) ................................................................ Max (Rim) Elevation (ft) ........................................................ Max (Rim) Offset (ft) ............................................................. Initial Water Elevation (ft) ...................................................... Initial Water Depth (ft) ........................................................... Ponded Area (ft²) ................................................................... 12/18/2024 Page 64 of 82 12/18/2024 Page 65 of 82 Storage Node : Dry Basin (continued) Outflow Orifices SN Element Orifice Orifice Flap Circular Rectangular Rectangular OrificeOrifice ID Type Shape Gate Orifice Orifice Orifice Invert Coefficient Diameter Height Width Elevation (in) (in) (in) (ft) 1 Dry PondOutlet Bottom CIRCULAR No 6.00 820.00 0.61 Output Summary Results 4.45 1.18 1.05 0.00 821.17 1.17 820.06 0.06 0 00:32 0.000 0 0 0.00 Total Time Flooded (min) ...................................................... Total Retention Time (sec) .................................................... Max HGL Depth Attained (ft) ................................................. Average HGL Elevation Attained (ft) ..................................... Average HGL Depth Attained (ft) .......................................... Time of Max HGL Occurrence (days hh:mm) ....................... Total Exfiltration Volume (1000-ft³) ....................................... Total Flooded Volume (ac-in) ................................................ Peak Inflow (cfs) .................................................................... Peak Lateral Inflow (cfs) ........................................................ Peak Outflow (cfs) ................................................................. Peak Exfiltration Flow Rate (cfm) .......................................... Max HGL Elevation Attained (ft) ............................................ 12/18/2024 Page 66 of 82 7\SH 5 3HULPHWHU $UHD )RU\DUGLQOHWVORFDWHGLQUHDU\DUGV &ORJJHG 0.6A(2gh)0.5 ,QOHW 5DWLRQDO)ORZ *UDWH 3HULPHWHU *UDWH$UHD 'HSWKDW&DVWLQJ :HLU 'HSWKDW&DVWLQJ 2ULILFH FIV IWIWIW IW 3RQGLQJGHSWKDWFDVWLQJFDQEHQRJUHDWHUWKDQ LQFKHVRUIHHW 6ZLQGOH\)RUHVW <DUG,QOHW&DSDFLWLHV -RE*%& 12/18/2024 Page 67 of 82 (URVLRQ3URWHFWLRQ0HWKRG 9HORFLW\YIWV 5HYHWPHQW5LSUDS ч &ODVV5LSUDS Y &ODVV5LSUDS Y (QHUJ\'LVVLSDWRU ! / $SURQ/HQJWKIW 4 )ORZFIV Y 9HORFLW\IWV ' 'LDPHWHUIW 7Z 7DLOZDWHUIW ,1'27)LJXUH-0LQLPXP5LSUDS$SURQ6L]H 2XWOHW 2XWOHW 2XWOHW 6WDUW (QG 7Z' )ORZ4 9HORFLW\Y 'LDPHWHU :LGWK :LGWK /HQJWK (URVLRQ3URWHFWLRQ0HWKRG 6WU FIV IWV IW IW IW IW &ODVV5LSUDS 5HYHWPHQW5LSUDS 5LS5DS$SURQ -RE*%& 6WUHDP9HORFLW\IRU(URVLRQ3URWHFWLRQ ,1'27)LJXUH' 5LS5DS$SURQ&DOFV6ZLQGOH\)RUHVW ܮ ൌ ͳǤͺܦ ܳ ܦଶǤହ ൅͹ܦ 12/18/2024 Page 68 of 82 APPENDIX D WATER QUALITY CALCULATIONS 12/18/2024 Page 69 of 82 :DWHU4XDOLW\9ROXPH PR V A 12 P = 1 DF 'U\3RQG $YHUDJ H$UHD $YHUDJ H$UHD 9ROXPH &XPXODWLYH 9ROXPH IWDFIWIW 1RUPDO3RRO Q =0.6A(2gh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age 70 of 82 LEGEND EXISTING STORM SEWER BASIN BREAKLINE PROPOSED STORM SEWER LAKE NORMAL POOL 0 GRAPHIC SCALE ( IN FEET ) 60' 30' 60' 1" = 60 FT DRAWN BY: CHECKED BY: FIELDWORK DATE: DATE DRAWN: PAGE OF SHEETS JOB NO. 111895GBC NES BMB 12/17/2024 1 1 BMP SIZING MAP SWINLEY FOREST OVERALL CARMEL HAMILTON CO, IN 12/18/2024 Page 71 of 82 Project Description WQU SSA.SPF Project Options CFS Elevation SCS TR-55 User-Defined Steady Flow YES NO Analysis Options Feb 02, 2021 00:00:00 Feb 03, 2021 00:00:00 Feb 02, 2021 00:00:00 0days 0 01:00:00 days hh:mm:ss 0 00:05:00 days hh:mm:ss 0 00:05:00 days hh:mm:ss 30 seconds Number of Elements Qty 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 Rainfall Details SN Rain Gage Data Data Source Rainfall Rain State County Return Rainfall Rainfall ID Source ID Type Units Period Depth Distribution (years) (inches) 1 Rain Gage-01 Time Series TS-01 Cumulative inches Indiana Hamilton 10 1.00 SCS Type II 24-hr Outlets ..................................................... Pollutants ......................................................... Land Uses ........................................................ Links.................................................................. Channels ................................................. Pipes ........................................................ Pumps ..................................................... Orifices .................................................... Weirs ....................................................... Nodes................................................................ Junctions ................................................. Outfalls .................................................... Flow Diversions ....................................... Inlets ........................................................ Storage Nodes ......................................... Runoff (Dry Weather) Time Step ..................... Runoff (Wet Weather) Time Step .................... Reporting Time Step ........................................ Routing Time Step ........................................... Rain Gages ...................................................... Subbasins......................................................... Enable Overflow Ponding at Nodes ................. Skip Steady State Analysis Time Periods ........ Start Analysis On ............................................. End Analysis On ............................................... Start Reporting On ........................................... Antecedent Dry Days ....................................... File Name ......................................................... Flow Units ........................................................ Elevation Type ................................................. Hydrology Method ............................................ Time of Concentration (TOC) Method ............. Link Routing Method ........................................ 12/18/2024 Page 72 of 82 Subbasin Summary SN Subbasin Area Peak Rate Weighted Total Total Total Peak Time of ID Factor Curve Rainfall Runoff Runoff Runoff Concentration Number Volume (ac) (in) (in) (ac-in) (cfs) (days hh:mm:ss) 1 Sub403WQ 2.18 484.00 91.01 1.00 0.36 0.78 0.82 0 00:20:48 12/18/2024 Page 73 of 82 Subbasin Hydrology Subbasin : Sub403WQ Input Data Area (ac) .....................................................2.18 Peak Rate Factor ........................................ 484.00 Weighted Curve Number ............................ 91.01 Rain Gage ID ............................................... Rain Gage-01 Composite Curve Number Area Soil Curve Soil/Surface Description (acres) Group Number - 2.18 - 91.01 Composite Area & Weighted CN 2.18 91.01 Subbasin Runoff Results Total Rainfall (in) ......................................... 1.00 Total Runoff (in) .......................................... 0.36 Peak Runoff (cfs) ........................................ 0.82 Weighted Curve Number ............................ 91.01 Time of Concentration (days hh:mm:ss) ..... 0 00:20:48 12/18/2024 Page 74 of 82 () Peak Runoff (cfs) ........................................ 0.82 Subbasin : Sub403WQ 12/18/2024 Page 75 of 82 (4 ' - 0 " [ 1 2 1 9 ] ) SOLIDS STORAGE SUMP INLET PIPE (MULTIPLE INLET PIPES MAY BE ACCOMMODATED) OUTLET PIPE VA R I E S BB 2' - 3 " [ 6 8 6 ] PLAN VIEW B-B NOT TO SCALE ELEVATION A-A NOT TO SCALE FIBERGLASS INTERNAL COMPONENTS FLOW CONTRACTOR TO GROUT TO FINISHED GRADE GRADE RINGS/RISERS A A 48" [1219] I.D. MANHOLE STRUCTURE TOP SLAB ACCESS (SEE FRAME AND COVER DETAIL)FLOW TOP OF CENTER CHAMBER (EXTENSIONS AVAILABLE AS REQUIRED) INLET PIPE(S) LOCATION MAY VARY WITHIN 260° PERMANENT POOL ELEVATION FRAME AND COVER (DIAMETER VARIES) NOT TO SCALE www.ContechES.com ® 800-338-1122 513-645-7000 513-645-7993 FAX 9025 Centre Pointe Dr., Suite 400, West Chester, OH 45069 CS-4 CASCADE SEPARATOR STANDARD DETAIL I: \ C O M M O N \ C A D \ T R E A T M E N T \ 2 1 C A S C A D E \ 4 0 S T A N D A R D D R A W I N G S \ D W G \ C S - 4- D T L . D W G 1 / 2 2 / 2 0 1 9 9 : 3 4 A M www.contechES.com CASCADE SEPARATOR DESIGN NOTES THE STANDARD CS-4 CONFIGURATION IS SHOWN. ALTERNATE CONFIGURATIONS ARE AVAILABLE AND ARE LISTED BELOW. SOME CONFIGURATIONS MAY BE COMBINED TO SUIT SITE REQUIREMENTS. CONFIGURATION DESCRIPTION GRATED INLET ONLY (NO INLET PIPE) GRATED INLET WITH INLET PIPE OR PIPES CURB INLET ONLY (NO INLET PIPE) CURB INLET WITH INLET PIPE OR PIPES GENERAL NOTES 1. CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE. 2. FOR SITE SPECIFIC DRAWINGS WITH DETAILED STRUCTURE DIMENSIONS AND WEIGHT, PLEASE CONTACT YOUR CONTECH ENGINEERED SOLUTIONS LLC REPRESENTATIVE. www.ContechES.com 3. CASCADE SEPARATOR WATER QUALITY STRUCTURE SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA AND INFORMATION CONTAINED IN THIS DRAWING. CONTRACTOR TO CONFIRM STRUCTURE MEETS REQUIREMENTS OF PROJECT. 4. CASCADE SEPARATOR STRUCTURE SHALL MEET AASHTO HS20 LOAD RATING, ASSUMING EARTH COVER OF 0' - 2' [610], AND GROUNDWATER ELEVATION AT, OR BELOW, THE OUTLET PIPE INVERT ELEVATION. ENGINEER OF RECORD TO CONFIRM ACTUAL GROUNDWATER ELEVATION. CASTINGS SHALL MEET AASHTO M306 AND BE CAST WITH THE CONTECH LOGO. 5. CASCADE SEPARATOR STRUCTURE SHALL BE PRECAST CONCRETE CONFORMING TO ASTM C478 AND AASHTO LOAD FACTOR DESIGN METHOD. 6. ALTERNATE UNITS ARE SHOWN IN MILLIMETERS [mm ]. INSTALLATION NOTES A. ANY SUB-BASE, BACKFILL DEPTH, AND/OR ANTI-FLOTATION PROVISIONS ARE SITE-SPECIFIC DESIGN CONSIDERATIONS AND SHALL BE SPECIFIED BY ENGINEER OF RECORD. B. CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFT AND SET THE CASCADE SEPARATOR MANHOLE STRUCTURE. C. CONTRACTOR TO INSTALL JOINT SEALANT BETWEEN ALL STRUCTURE SECTIONS AND ASSEMBLE STRUCTURE. D. CONTRACTOR TO PROVIDE, INSTALL, AND GROUT INLET AND OUTLET PIPE(S). MATCH PIPE INVERTS WITH ELEVATIONS SHOWN. ALL PIPE CENTERLINES TO MATCH PIPE OPENING CENTERLINES. E. CONTRACTOR TO TAKE APPROPRIATE MEASURES TO ASSURE UNIT IS WATER TIGHT, HOLDING WATER TO FLOWLINE INVERT MINIMUM. IT IS SUGGESTED THAT ALL JOINTS BELOW PIPE INVERTS ARE GROUTED. SITE SPECIFIC DATA REQUIREMENTS STRUCTURE ID WATER QUALITY FLOW RATE (cfs [L/s]) PEAK FLOW RATE (cfs [L/s]) RETURN PERIOD OF PEAK FLOW (yrs) RIM ELEVATION PIPE DATA: INVERT MATERIAL DIAMETER INLET PIPE 1 INLET PIPE 2 OUTLET PIPE NOTES / SPECIAL REQUIREMENTS: 12/18/2024 Page 76 of 82 APPENDIX E EMERGENCY CALCULATIONS 12/18/2024 Page 77 of 82 /DNH 4ϭϬϬ FIV <HDU(OHY 7RSRI%DQN 6SLOOZD$OHY &t +LJKZDWHU )UHHERDUG K )7 0LQLPXP)ODW%RWWRP/HQJWK /t )7 3ODQ/HQJWK 66 6LGHVORSHV 6ZLQGOH$RUHVW /DNH6SLOOZD\&DOFXODWLRQV -RE*%& 9HORFLW\IWV ܮௐ ൌ ሺͳǤʹͷ כ ܳͳͲͲሻ ܥௐ כ݄ଷ ଶ 12/18/2024 Page 78 of 82 APPENDIX F BASIN MAPS 12/18/2024 Page 79 of 82 LEGEND EXISTING STORM SEWER BASIN BREAKLINE PROPOSED STORM SEWER LAKE NORMAL POOL 0 GRAPHIC SCALE ( IN FEET ) 100' 50' 100' 1" = 100 FT DRAWN BY: CHECKED BY: FIELDWORK DATE: DATE DRAWN: PAGE OF SHEETS JOB NO. 111895GBC NES BMB 12/17/2024 1 1 EXISTING CONDITIONS MAP SWINLEY FOREST OVERALL CARMEL HAMILTON CO, IN 12/18/2024 Page 80 of 82 LEGEND FLOODWAY FRINGE BASIN BREAKLINE PROPOSED STORM SEWER LAKE NORMAL POOL 0 GRAPHIC SCALE ( IN FEET ) 100' 50' 100' 1" = 100 FT DRAWN BY: CHECKED BY: FIELDWORK DATE: DATE DRAWN: PAGE OF SHEETS JOB NO. 111895GBC NES BMB 12/17/2024 1 1 POND ROUTING MAP SWINLEY FOREST OVERALL CARMEL HAMILTON CO, IN FWF FWF 12/18/2024 Page 81 of 82