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HomeMy WebLinkAbout20000013 Ver 1_COMPLETE FILE_20000105 State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director Denise M. Poulos, LLS ECS 5-C Douglas Circle Greensboro, NC 27407 Dear Ms. Poulos: R?I;VA NCDENR Division of Water Quality February 22, 2000 Subject: Summit Properties DWQ Project No. 000013 Alamance County The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional information is necessary to complete the technical review process. The required additional information is as follows: Permanent Water Quality Pool Surface Area The permanent pool surface area should be determined using the average depth of the pond. The plans indicate that the maximum depth was used. Please modify the plans to reflect the use of the average depth to calculate the surface area. Access Access to the pond must be adequate to allow for maintenance of the basin and associated structures. Please specify access routes on the engineering plans. Operation and Maintenance Agreement An operation and maintenance agreement is required. Reference NCDENR Administrative Code Section 15A NCAC 2H .1000 Stormwater Management , December 1995, Section. 1008, item i. A stormwater control structure will not operate as designed without regular maintenance. Typical requirements for an operation and maintenance plan include the following: • Vegetation management/mowing schedule • Semi-annual inspections • Debris check after every storm event • Benchmark for sediment removal (specific elevations listed) • Designation of a responsible party The operation and maintenance agreement must also be signed by the responsible party and notarized. 4401 Reedy Creek Road, Raleigh, NC 27607 Telephone 919-733-1786 FAX 919-733-9959 An Fnomi nnnnrfimifv Affirmafiva Arfinn Fmnlnvar ri110/ rar-vrlari/ 1110/ nncf.d.nnciomar nanar 1 Division wetlands unit staff will strive to complete a final technical review within 10 working days of receipt of the requested information. Completing the enclosed worksheet will greatly decrease the staff review time. If you have any questions or would like to discuss this project, please contact me at (919) 733-9584. Sincerely, Todd St. Jo , PE Environmental Engineer Attachments cc: John Dorney, Wetlands/401 Unit Winston-Salem Regional Office File 01. Project No. DWQ (to be provided by DWQ) DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET DWQ Stormwater Management PlanReview: A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin, design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for additional information and will substantially delay final review and approval of the project. 1. PROJECT INFORMATION (please complete the following information): Project Name : Contact Person: Phone Number: ( ) For projects with multiple basins, specify which basin this worksheet applies to: Basin Bottom Elevation Permanent Pool Elevation Temporary Pool Elevation Permanent Pool Surface Area Drainage Area Impervious Area Permanent Pool Volume Temporary Pool Volume Forebay Volume SA/DA used Diameter of Orifice ft. (average elevation of the floor of the basin) ft. (elevation of the orifice invert out) ft. (elevation of the outlet structure invert in) sq. ft. (water surface area at permanent pool elevation) ac. (on-site and off-site drainage to the basin) ac. (on-site and off-site drainage to the basin) cu. ft. (combined volume of main basin and forebay) cu. ft. (volume detained on top of the permanent pool) cu. ft. (surface area to drainage area ratio) in. (draw down orifice diameter) U. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a requirement hay not been met, attach an explanation of why. Applicants Initials The temporary pool controls runoff from the 1 inch storm event. The basin length to width ratio is greater than 3:1. The basin side slopes are no steeper than 3:1. A submerged and vegetated perimeter shelf at less than 6:1 is provided. Vegetation to the permanent pool elevation is specified. An emergency drain is provided to drain the basin. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). The temporary pool draws down in 2 to 5 days. The forebay volume is approximately equal to 20% of the total basin volume. Sediment storage is provided in the permanent pool. Access is provided for maintenance. A minimum 30-foot vegetative filter is provided at the outlet. A site specific operation and maintenance (O&M) plan is provided. A vegetation management/mowing schedule is provided in the O&M plan. Semi-annual inspections are specified in the O&M plan. A debris check is specified in the O&M plan to be performed after every storm event. A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan. A responsible party is designated in the O&M plan. FORM SWG100 09/97 Page 1 of 1 State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director A 4 0 • W'A Opm ; lk NC ENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES February 3, 2000 Alamance County DWQ Project # 000013 APPROVAL of 401 Water Quality Certification and ADDITIONAL CONDITIONS Mr. Paul Hoyle Summit Properties of Alamance 3928 Forest Oak Lane Mebane, NC 27302 Dear Mr. Hoyle: You have our approval, in accordance with the attached conditions and those listed below, to place fill material in an additional 0.30 acres of wetlands for the purpose of constructing Deerfield Crossing - lot 4 (commercial development) at NC 119 in Melville Township, Alamance County as described in your application dated January 4, 2000. After reviewing your application, we have decided that this fill is covered by General Water Quality Certification Number 3108. This certification allows you to use Nationwide Permit Number 26 when the Corps of Engineers issues it. In addition, you should get any other federal, state or local permits before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Coastal Stormwater, Non-Discharge and Water Supply Water shed regulations. This approval will expire when the accompanying 404 or CAMA permit expires unless otherwise specified in the General Certification. This approval is only valid for the purpose and design that you described in your application except as modified below. If you change your project, you must notify us and you may be required to send us a new application. If the property is sold, the new owner must be given a copy of this Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h) (6) and (7). For this approval to be valid, you must follow the conditions listed in the attached certification and any additional conditions listed below. 1. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and streams to notify the state in order to assure compliance for future wetland and/or water impact. These mechanisms shall be put in place within 30 days of the date of this letter or the issuance of the 404 Permit (whichever is later). 2. An additional condition is that a final, written stormwater management plan shall be approved by this Office before the impacts specified in this Certification occur. The stotmwater management plan must include plans and specifications for stormwater management facilities designed to remove 85% TSS according to the most recent version of the NC DENR Stormwater Beet Management Practices Manual. Also, before any permanent building is occupied at the subject site, the facilities, as approved by this Office, shall be constructed and operational, and the stormwater management plan, as approved by this Office, shall be implemented. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition, which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions. please telephone John Doroey at 919-733-9646. nce e , . Attachment Steven cc: Corps of Engineers Raleigh Field Office Winston-Salem DWQ Regional Office File copy Central Files Denise Poulos; Engineering Consulting Services. Inc. 000013.1tr Division of Water Quality • Non-Discharge Branch 1621 Mail Service Center Raleigh NC 27669-1621 Telephone 919-733-1786 FAX # 733-9959 An Equal Opportunity Affirmative Action Employer • 50% recycled/10% post consumer paper .. State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director ,&14 61 A9MbNdMbNdft NCDENR Division of Water Quality February 22, 2000 Denise M. Poulos, LLS ECS 5-C Douglas Circle Greensboro, NC 27407 Subject: Summit Properties DWQ Project No. 000013 Alamance County Dear Ms. Poulos: The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional information is necessary to complete the technical review process. The required additional information is as follows: Permanent Water Quality Pool Surface Area The permanent pool surface area should be determined using the average depth of the pond. The plans indicate that the maximum depth was used. Please modify the plans to reflect the use of the average depth to calculate the surface area. 2. Access Access to the pond must be adequate to allow for maintenance of the basin and associated structures. Please specify access routes on the engineering plans. Operation and Maintenance Agreement An operation and maintenance agreement is required. Reference NCDENR Administrative Code Section 15A NCAC 2H .1000 StormwaterManageme?rt , December 1995, Section .1008, item i. A stormwater control structure will not operate as designed without regular maintenance. Typical requirements for an operation and maintenance plan include the following: • Vegetation management/mowing schedule • Semi-annual inspections • Debris check after every storm event • Benchmark for sediment removal (specific elevations listed) • Designation of a responsible party The operation and maintenance agreement must also be signed by the responsible party and notarized. 4401 Reedy Creek Road, Raleigh, NC 27607 Telephone 919-733-1786 FAX 919-733-9959 An Pmtol r)nnnrfionifv Affirmafiva Arfinn Fmnlnvar ..9;00/ rarvriari/ 1nO/ nncf_rnncsimar nanar 4-- . Division wetlands unit staff will strive to complete a final technical review within 10 working days of receipt of the requested information. Completing the enclosed worksheet will greatly decrease the staff review time. If you have any questions or would like to discuss this project, please contact me at (919) 733-9584. Sincerely, Todd St. Jo , PE Environmental Engineer Attachments cc: John Dorsey, Wetlands/401 Unit Winston-Salem Regional Office File Ce Project No. DWQ (to be provided by DWQ) DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin, design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for additional information and will substantially delay final review and approval of the project. 1. PROJECT INFORMATION (please complete the following information): Project Name : Contact Person: Phone Number: For projects with multiple basins, specify which basin this worksheet applies to: Basin Bottom Elevation Permanent Pool Elevation Temporary Pool Elevation Permanent Pool Surface Area Drainage Area Impervious Area Permanent Pool Volume Temporary Pool Volume Forebay Volume SA/DA used Diameter of Orifice ft. (average elevation of the floor of the basin) ft. (elevation of the orifice invert out) ft. (elevation of the outlet structure invert in) sq. ft. (water surface area at permanent pool elevation) ac. (on-site and off-site drainage to the basin) ac. (on-site and off-site drainage to the basin) cu. ft. (combined volume of main basin and forebay) cu. ft. (volume detained on top of the permanent pool) cu. ft. (surface area to drainage area ratio) in. (draw down orifice diameter) H. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of why. Applicants Initials The temporary pool controls runoff from the 1 inch storm event. The basin length to width ratio is greater than 3:1. The basin side slopes are no steeper than 3:1. A submerged and vegetated perimeter shelf at less than 6:1 is provided. Vegetation to the permanent pool elevation is specified. An emergency drain is provided to drain the basin. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). The temporary pool draws down in 2 to 5 days. The forebay volume is approximately equal to 20% of the total basin volume. Sediment storage is provided in the permanent pool. Access is provided for maintenance. A minimum 30-foot vegetative filter is provided at the outlet. A site specific operation and maintenance (O&M) plan is provided. A vegetation management/mowing schedule is provided in the O&M plan. Semi-annual inspections are specified in the O&M plan. A debris check is specified in the O&M plan to be performed after every storm event. A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan. A responsible party is designated in the O&M plan. FORM SWG100 09/97 Page 1 of 1 Project No. DWQ Project Name: Summit Prop 000013 SUBMITTED DESIGN: REQUIRED DESIGN: elevations status Bottom of Basin (ft) 615.8 Permanent Pool (ft) 620.8 5 ft. depth ok Temporary Pool (ft) 623 2.2 ft. depth ok areas Permanent Pool SA (sq ft) 19201 17021 sq. ft. )7 ok Drainage Area (ac) 15.5 Impervious Area (ac) 13.18 85.0 % volumes Permanent Pool (cu ft) 43784 Temporary Pool (cu ft) 46703 45872 cu. ft. ok Forebay (cu ft) 7129 16.3 % check forebi other parameters SA/DA 0 2.52 - Orifice Diameter (in) 3 0.25 cfs drawdown - Design Rainfall (in) 1 2.2 day drawdown ok Linear Interpolation of Correct SA/DA*** Next Lowest Project Impervious Next Highest (70Impervious 80 85.0 90 2 f 2(00 5 ft. Permanent Pool Depth SA/DA from Table 2.38 2.52 2.66 z? z_ Z? 0m CL n m g ? g m m w m m ? m 3 ac r Ll ? 'm °o° < ? < !t =r 0 3 a 0 ? o, o 2 o, 0 a tn . ?n ° m = 0 0 - 9 0 R - M R ? 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S S g 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 ??? ? ? o o CD O O CA V A O W V W W N Co N j E CO O O O O O O O O O I w m " 3 V ? pp A v W CO" p ?? .A C." 0 p 0 0 0 p 0 0 8 01 0 FHa w c 7 J C n ??pp ? ? CO y w 7 CL M A IT v (D v (D •Y O 0 Q. v V) O C Q. Wet Detention Pond Desiqn (continued) Project: Deerfield Crossing Lot 4 Description: Water Quality Pond Design By: M. Reich Checked By: MDR 10 Year Desian Storm Routina Pond Information Riser Information Barrel Information Eme enc S Illwa IMormatlon Pond Bottom Elev. 615.80 Riser size 30 in. Barrel size 24 in. Eme enc illwa Cw 3.00 Invert of Barrel 615.80 Riser Mail. CAP Barrel Matl. CAP_ Em. Spillway Width 40 ft. Permanent Pool Elev. _ 620.80 Riser Cw: 3.33 Barrel Cd: 0.60 To of Riser Elev. 623.00 Riser Cd: 0.60 Orifice Area 3.14 s.f . Emer enc Spillway El. 626.00 Weir Length 7.85 _ _ To of Dam 628.00 Orifice Area 4.91 s.f. _ Design Storm Information S eStor a Constants Routing Results Maximum. Discharges Peak Inflow 76.42 cis Ks 2355 Max. Stage 9.18 ft. Em. Spill. 0.00 cfs Time to Peak 27 min. b 1.84 = Elev. 624.98 Total 33.27 cis Routing Time Interval 1 min. Where 2 = (S/Ks) Max. Stor. 140555 cu. ft. Time (T) min. Inflow (Q) cfs Additional Vol. Req'd (AS) cu. ft. Total Req'd Storage (S) cu. ft. Stage (Z) ft. Riser Discharge (weir) cfs Riser Discharge orifice cfs Barrel Discharge cfs Emergency Spillway weir cfs Total Discharge cfs 0 0.00 0 45826 5.00 0.00 0.00 0.00 0.00 0.00 1 0.25 0 45826 5.00 0.00 0.00 0.00 0.00 0.00 2 -- 1.00 - 15 45841 - 5.00 0.00 ---- 0.00 0.00 0.00 0.00 3 2.25 60 45901 5.00 0.00 -------- 0.00 _ 0.00 0.00 0.00 -----4 3.97 135 46036 5.01 0.00 0.00 0.00 0.00 0.00 5 6.14 _ 238 46274 5.03 0.00 0.00 0.00 0.00 0.00 6 8.73 368 46642 5.05 _ _ 0.00 ---- 0.00 0.00 0.00 0.00 7 11.71 524 47166 .08 5.08 0.00 0.00 0.00 0.00 0.00 8 15.04 703 47869 5.12 _ 0.00 ___ 0.00 ___6.00 0.00 0.00 9 18.68 903 48771 5.17 0.00 0.00 0.00 0.00 0.00 _ 10 22.57 __ 1121 49892 5.24 0.00 0.00 0.00 0.00 0.00 11 26.67 1354 51246 5.31 _ 0.00 _ _ 0.00 0.00 0.00 0.00 12 30.93 1600 52847 5.40 0.00 0.00 0.00 _ 0.00 0.00 13 35.28 1856 54702 5.50 0.00 0.00 0.00 0.00 0.00 14 39.66 2117 56819 5.62 0.00 0.00 0.00 0.00 0.00 15 44.03 2380 59199 5.74 0.00 0.00 0.00 0.00 0.00 16 48.32 2642 61841 5.88 0.00 0.00 0.00 0.00 0.00 17 52.48 - 2899 64740 6.03 0.00 0.00 0.00 0.00 0.00 18 56.45 3149 67889 _ _ 6.19 0.00 0.00 0.00 0.00 0.00 _ 19 60.18 3387 71277 6.35 0.00 0.00 0.00 0.00 0.00 _ 20 63.62 3611 74888 6.53 0.00 0.00 0.00 _ 0.00 0.00 21 66.73 3817 78705 6.70 0.00 0.00 0.00 0.00 0.00 22 69.45 4004 82708 --- - - 6.89 0.00 0.00 0.00 _ 0.00 0.00 23 71.77 4167 66 8 76 7.07 0.00 0.00 0.00 0.00 0.00 24 73.64 4306 91182 7.26 0.39 5.83 37.85 0.00 0.39 25 75.05 4395 95577 7.45 3.24 _ 11.78 38.41 0.00 3.24 26 75.97 4308 99885 7.63 7.34 15.47 38.95 0.00 7.34 27 76.39 4117 104003 7.80 12.08 18.27 39.44 0.00 12.08 28 76.30 3858 107861 7.95 17.09 20.51 39.89 0.00 17.09 29 _ 7532 3553 111413 8.09 _ 22.11 22.35 40.29 0.00 22.11 30 74.64 3216 _ 114630 8.22 26.94 23.87 _ 40.65 0.00 23.87 31 73.08 3046 117676 8.34 31.74 25.21 40.98 0.00 25.21 32 71.06 2872 120548 8.45 _36.44 26.40 41.28 0.00 26.40 - 33 68.60 2680 123227 8.55 40.97 __ 27.45 41.56 0.00 27.45 34 65.75 2469 125697 8.64 45.25 28.37 41.81 0.00 28.37 35 6238 2242 127939 8.72 49.23 29.18 42.04 0.00 29.18 36, 59.86 2016 129955 8.80 52.87 29.88 42.24 0.00 29.88 Alley, Williams, Carmen and King, Inc. Burlington, N.C. Wet Detention Pond Design (continued) 12/1 Project: Deerfield Crossing Lot 4 Description: Water Quality Pond Design By: M. Reich Checked By: MDR 10 Year Design Storm Routina (continund? Time M min. Inflow (Q) cfs Additional Volume (AS) cu. ft. Total Storage (S) cu. ft. Stage (Z) ft. Riser Discharge weir cis Riser Discharge orifice cfs Barrel Discharge cfs Emergency Spillway wel cfs Total Discharge cis 37 57.08 1799 131753 8.86 56.17 30.49 42.42 0.00 30.49 38 54.43 1595 133348 8.92 59.13 ----- 31.02 42.58 -------- 0.00 31.02 -.--39 - 51.90 1405 _ 134753 8.97 61.77 31.48 42.71 0.00 31.48 ,if) 49.49 1226 135979 9.02 64.09 31.86 42.83 0.00 31.86 _ 41 47.19 - 1058 137036 _ 9.06 66.10 32.20 42.93 0.00 32.20 42 45.00 900 137936 9.09 67.83 32.47 43.02 0.00 32.47 43 _ 42.91 752 - 138688 9.11 69.28 32.70 43.09 0.00 32.70 44 40.92 612 139300 9.14 70.47 32.89 43.15 0.00 32.89 45 39.02 _ 482 139782 9.15 71.41 33.03 43.19 0.00 33.03 46 37.21 359 -- 140141 -- --- 9.17 72.11 33.14 43.23 0.00 33.14 47 - -- - 35.48 - ------ 244 --- - 140385 - --- 9.17 - -- 72.58 -- 33121 -- 43.25 -- 0.00 33.21 48 33.83 136 i3 6 140521 - 9.18 - 72.85 - 33.26 ---- 43.26 0.00 - 33.26 - 49 32.26 -- 35 140555 9.18 72.92 33.27 43.27 0.00 33.27 50 __ 30.76 -60 _ 140495 9.18 72.80 33.25 43.26 0.00 33.25 51 29.33 -149 140346 9.17 72.51 33.20 _ 43.25 0.00 33.20 52 27.97 - -232 140113 9.17 72.05 33.13 _ 43.22 0.00 33.13 53 26.67 -310 139803 9.15 71.45 33.04 43.20 0.00 33.04 -- 54 25.43 -382 139421 9.14 70.71 32.93 43.16 0.00 32.93 55 24.25 -450 138972 9.12 69.83 32.79 43.12 0.00 32.79 56 23.12 -512 138459 9.11 _ 68.84 32.63 _ 43.07 _ 0.00 32.63 _ _-_ _ 57 22.05 --- -571 137889 9.09 67.74 3246 _ 43.01 0.00 32.46 _ 58 21.03 -625 137264 9.06 66.54 32.27 42.95 0.00 32.27 59 20.05 -674 136590 9.04 65.25 32.06 42.89 0.00 32.06 60 _ 19.12 -720 135870 9.01 63.88 31.83 42.82 0.00 31.83 61 -- - - - 18.23 -763 - ---- 135107 - 8.99 62.43 31.59 42.75 0.00 31.59 62 17.38 -801 134305 --- - 8.96 60192 31.33 - 42.67 0.00 31.33 63 _ 16.58 -837 133469 8.93 59.35 31.06 42.59 0.00 31.06 64 15.81 -869 132600 8.90 57.73 _ 30.77 42.50 _ 0.00 30.77 65 15.07 -898 131702 8.86 56.07 _ 30.48 42.42 0.00 30.48 66 ___ 14.37 -924 130777 8.83 54.37 30.17 __ 42.32 0.00 30.17 67 13.71 -948 129830 8.79 _52.64 29.84 42.23 0.00 29.84 68 13.07 -968 128862 8.76 50.89 _ 29.51 _ 42.13 _ 0.00 29.51 69 12.46 -986 127875 8.72 49.11 29.16 42.04 0.00 29.16 70 11.88 -1002 126873 8.68 47.33 28.80 41.93 0.00 28.80 71 11.33 -1015 125858 8.65 _ 45.53 28.43 _ 41.83 0.00 28.43 72 10.80 -1026 124832 8.61 _ 43.74 28.05 41.73 0.00 28.05 73 10.30 -1035 123797 8.57 41.95 27.67 41.62 0.00 27.67 74 9.82 - -1042 122755 8.53 -- 40.16 27.27 41.51 -- 0.00 27.27 75 9.37 -1047 121709 8.49 38.38 26.86 41.40 0.00 26.86 76 8.93 -1049 120659 8.45 36.62 26.44 41.29 0.00 26.44 77 8.52 -1051 119609 8.41 34.88 26.02 41.18 0.00 26.02 78 - 8.12 _ -1050 118559 8.37 _ 33.17 25.58 41.07 0.00 25.58 79 7.75 -1048 117511 8.33 31747 25.14 40.96 0.00 25.14 80 7.39 -1044 116468 8.29 29.81 24.69 40.85 0.00 24.69 81 7.04 -1038 115429 8.25 28.18 24.23 40.73 0.00 24.23 82 6.72 -1031 114398 8.21 __ 26.59 23.76 40.62 0.00 23.76 83 _ 6.40 -1023 113375 8.17 25.03 _ 23.29 40.51 0.00 23.29 84 6.11 -1013 112362 8.13 _ 23.51 22.81 40.40 0.00 22.81 Alley, Williams, Carmen and King, Inc. Burlington, N.C. Wet Detention Pond Design (continued) Project: Deerfield Crossing Lot 4 Description: Water Quality Pond Design By: M. Reich Checked By: MDR 10 Year Desian Storm Routina (continund? Time (T) min. Inflow (Q) cis Additional Volume (4S) cu. ft. Total Storage (S) cu. ft. Stage (Z) ft. Riser Discharge wei cfs Riser Discharge orifice cis Barrel Discharge cfs Emergency Spillway weir cfs Total Discharge cfs 85 5.82 -1002 111360 8.09 22.03 22.32 40.28 0.00 22.03 86 5.55 -973 110387 8.05 20.63 21.84 40.17 0.00 20.63 87 5.29 -904 109482 8.02 19.34 _ 21.37 40.07 0.00 19.34 88 5.05 -843 108640 7.98 18.16 20.93 _ 39.98 0.00 18.16 89 4.81 -787 107853 7.95 17.08 20.51 39.89 0.00 _ 17.08 90 4.59 -736 107117 7.92 16.09 _ 20.10 39.80 0.00 16.09 91 4.38 490 106427 7.90 15.17 19.71 _ 39.72 0.00 15.17 92 4.17 -648 105779 7.87 14.33 19.34 39.65 0.00 14.33 93 3.98 -609 105170 7.84 13.55 18.98 39.58 0.00 13.55 _ 94 3.80 -574 104596 7.82 12.82 18.64 39.51 0.00 12.82 95 3.62 -541 104054 7.80 12.15 18.30 39.44 0.00 12.15 96 3.45 -512 103542 7.78 11.52 17.98 _ 39.38 0.00 11.52 97 _ 3.29 -484 103058 7.76 10.94 17.67 39.33 0.00 10.94 98 3.14 -459 102600 7.74 10.39 17.37 39.27 0.00 10.39 99 2.99 435 102165 7.72 9.88 17.09 _ 39.22 0.00 9.88 100 2.85 -413 101751 7.71 9.40 16.81 39.17 0.00 9.40 101 212 -393 101358 7.69 8.96 16.54 39.12 0.00 8.96 102 2.59 -374 100984 7.67 8.54 16.27 39.08 0.00 8.54 103 2.47 -357 100628 7.66 8.14 16.02 39.04 0.00 8.14 104 2.36 -340 _ 100287 7.65 --- 7.77 15.77 _ 38.99 0.00 7.77 105 2.25 -325 99963 7.63 7.42 15.53 38.95 0.00 7.42 106 2.14 -310 99652 7.62 7.09 15.30 38.92 0.00 7.09 107 2.05 -297 99355 7.61 6.78 15.07 38.88 0.00 6.78 108 1.95 -284 99071 7.59 6.49 14.85 38.85 0.00 6.49 109 1.86 -272 98799 7.58 6.21 14.64 38.81 0.00 6.21 110 1.77 -261 98537 7.57 5.95 --- - 1-4.43 38.78 -- 0.00 5.95 111 1.69 -251 98287 7.56 5.70 14.23 38.75 0.00 5.70 112 1.61 -241 98046 7.55 5.47 14.03 38.72 0.00 5.47 _ 113 - 1.54 -231 97815 7.54 5.24 13.83 38.69 0.00 5.24 114 1.47 -222 97592 7.53 5.03 13.64 _ -- 3 0.00 5.03 115 1.40 -214 97379 7.52 4.83 13.46 38.64 0.00 4.83 116 1.33 -206 97173 7.52 _ _ 4.64 13.28 38.61 0.00 4.64 117 1.27 -198 96974 7.51 4.46 13.10 38.59 _ 0.00 _ 4.46 118 1.21 -191 96763 7.50 _ 4.28 12.93 38.56 0.00 4.28 119 1.16 -184 96599 7.49 4.12 12.76 38.54 0.00 4.12 120 1.10 -178 96421 7.48 3.96 12.60 38.52 0.00 3.96 121 1.05 -171 96250 7.48 3.81 12.44 38.50 0.00 3.81 122 1.00 -166 96084 7.47 3.67 12.28 38.48 0.00 3.67 123 0.96 -160 95924 7.46 3.53 12.12 38.46 0.00 3.53 124 0.91 -154 95770 7.46 3.40 11.97 38.44 0.00 3.40 125 0.87 -149 95621 7.45 .28 3.28- _ -- 11.83 38.42 _ 0.00 3.28 126 0.83 -144 95476 7.44 3.16 11.68 38.40 0.00 3.16 127 0.79 -140 95337 7.44 3.04 _ 11.54 38.38 0.00 3.04 128 0.75 -136 95201 7.43 2.93 11.40 38.37 0.00 2.93 129 0.72 131 95071 743 2.83 11.26 38.35 0.00 2.83 130 0.69 -127 94944 7.42 2.73 11.13 38.33 0.00 2.73 131 0.65 -123 94821 7.42 2.63 11.00 38.32 0.00 2.63 132 0.62 -119 94702 7.41 2.54 10.87 38.30 0.00 2.54 Alley, Williams, Carmen and King, Inc. Burlington, N.C. Wet Detention Pond Design (continued) Project: De Description: W Design By: M. By: MDR 10 Year Desian Starm Rnutina (cnntiniiad1 Time M min. Inflow (Q) cis Additional Volume (AS) cu. ft. Total Storage (S) cu. ft. Stage M ft. Riser Discharge weir cfs Riser Discharge orifice cfs Barrel Discharge cfs Emergency Spillway wel cfs Total Discharge cfs 133 0.59 -115 04587 7.41 2.46 10.74 38.29 0.00 2.46 134 0.57 _ -112 94475 7.40 2.37 10.62 38.27 0,00 2.37 135 0.54 -108 94367 7.40 2.29 10.50 38.26 0.00 2.29 136 0.52 -105 _ 94262 7.39 _2.21 10.38 38.25 0.00 2.21 137 0.49 -102 94160 749 2.14 10.26 38.23 0.00 2.14 Alley, Williams, Carmen and King, Inc. Burlington, N.C. Wet Detention Pond Design (continued) Date: 12/10/99 Sheet: 8 Project: Deerfield Crossing Lot 4 Description: Water Quality Pond Design By: M. Reich Checked By: MDR 100 Year Desian Storm Routing Pond Information Riser Information Barrel Information Eme nc 8 Illwa Information Pond Bottom Elev. 615.80 Riser size 30 in. Barrel size 24 in. me enc S fllwa Cw 3,00 Invert of Barrel 615.80 Riser Matl. CAP Barrel Matl. CAP Em. Spillway Width 40 ft. Permanent Pool Elev. 620.80 Riser Cw: 3.33 Barrel Cd: 0.60 To of Riser Elev. 623.00 Riser Cd: 0.60 Orifice Area 3.14 s.f. Emergen Spillway El. 626.00 Weir Length 7.85 _ To of Dam 628.00 Orifice Area 4.91 s.f. Design Storm Information s e-Stor a constants Routing Results Maximum. Discha s _ Peak Inflow 105.40 cfs Ks 2451 Max. Sta a 10.46 ft. Em. § pill, 15.82 cfs Time to Peak 30 min. b 1.82 = Elev. 626.26 _ Total 58.49 cfs Routing Time Interval 1 min. Where 2 = (S/Ks) Max. Stor. 176711 _ cu. ft. Time m min. Inflow (Q) cfs Additional Volume (AS) cu. ft. Total Storage (S) cu. ft. Stage (Z) ft. Riser Discharge weir cfs Riser Discharge orifice cfs Barrel Discharge cis Emergency Spillway weir cfs Total Discharge cfs 0 0.00 0 46043 5.00 0.00 0.00 0.00 0.00 0.00 1 0.29 0 _ 46043 5.00 _ 0.00 0.00 _ 0.00 0.00 0.00 2 1.15 17 46060 5.00 0.00 0.00 0.00 0.00 0.00 3 2.57 _ 69 46129 5.01 0.00 0.00 0.00 _ 0.00 0.00 4 4.54 154 46283 5.01 _ 0.00 0.00 _ 0.00 0.00 0.00 5 7.03 272 46555 5.03 0.00 0.00 0.00 0.00 0.00 6 10.02 422 46977 5.06 --- 0.00 _ 0.00 0.00 0.00 0.00 7 13.48 601 47578 5.09 0.00 0.00 0.00 0.00 0.00 8 17.37 _ 809 48387 5.14 0.00 0.00 0.00 0.00 _ 0.00 9 21.64 1042 49429 5.20 0.00 0.00 0.00 0.00 0.00 10 26.25 1298 50727 5.27 0.00 0.00 0.00 0.00 0.00 11 31.15 1575 52302 5.36 0.00 0.00 __ 0.00 _ 0.00 _ 0.00 12 36.28 - 1869 - 54171 5.47 0.00 0.00 0.00 0.00 0.00 13 41.59 2177 56348 5.59 - - - 0.00 - - - 0.00 0.00 -- 0.00 ----0.00 14 47.03 2496 58843 5.72 0.00 _ 0.00 0.00 0.00 0.00 15 52.52 2822 61685 5.87 0.00 0.00 0.00 0.00 0.00 16 58.02 3151 64816 6.03 _ 0.00 0.00 0.00 0.00 0.00 17 63.46 - 3481 68297 _ 6.21 0.00 0.00 0.00 0.00 0.00 18 68.78 3808 72105 6.40 0.00 0.00 _ 0.00 0.00 0.00 19 73.93 4127 _ 76232 6.59 0.00 0.00 _ 0.00 _600 0.00 20 78.84 -4436 80668 6.80 0.00 0.00 _ 0.00 0.00 0,00 21 83.47 4731 85398 7.02 0.00 0.00 _ 0.00 0.00 0.00 22 87.77 5008 90407 7.24 0.21 4.76 37.79 0.00 0.21 23 91.68 - 5253 95660 7.47 3.64 12.25 38.47 0.00 3.64 24 95.17 5283 100943 7.69 9.03 16.58 39.13 _ 0.00 9.03 25 98.19 5168 _ 106111 7.91 15.51 19.86 39.75 0.00 15.51 26 100.72 4961 111072 8.11 22.57 22.50 40.32 0.00 22.50 27 102.72 4693 115765 8.29 29.87 24.71 _ 40.85 0.00 _ 24.71 28 104.18 4681 120446 8.48 37.66 26.69 41.36 0.00 26.69 29 105.07 4649 125095 _ 8.65 45.81 28.49 41.85 0.00 28.49 30 105.40 4595 129690 8.83 54.23 30.14 42.32 0.00 30.14 31 105.15 4516 134206 8.99 62.81 31.65 42.77 0.00 _ 31.65 32 104.33 4410 138616 9.15 71.46 33.04 43.20 0.00 33.04 33 102.94 4277 142893 9.31 80.06 34.32 43.60 0.00 34.32 34 _ 101.01 4117 147010 9.45 88.53 35.49 43.98 0.00 35.49 _ 35 L 98.55 3931 _ 150941 9.59 96.78 36.56 44.34 0.00 36.56 36 95.58 3719 154660 9.72 104.71 37.53 44.67 0.00 37.53 Alley, Williams, Carmen and King, Inc. Burlington, N.C. Wet Detention Pond Design (continued) Date: 12%10%99 Project: Deerfield Crossing Lot 4 Description: Water Quality Pond Design By: M. Reich By: MDR 100 Year Daninn Stnrm Rmifinn /r-nn+inma i1 Time M min. Inflow (Q) cis Additional Volume (AS) cu. ft. Total Storage (S) cu. ft. Stage (27 ft. Riser Discharge (weir) cfs Riser Discharge odflce cfs Barrel Discharge cis Emergency Spillway weir cis Total Discharge cis 7 92.16 3483 158144 - 9.84 112.25 38.41 44.98 0.00 38.41 38 88.46 3225 161368 9.95 119.31 -- 39.20 45.26 -- 0.00 39.20 39 84.71 ___ 2955 _ 164324 10.0_5 _ 125.84 39.90 45.51 0.00 39.90 40 - - 81.13 - - 2689 -- _ 167012 - 10.14 131.85 _ ___40.53 45.73 0.00 40 53 41 76 9 2,6 _ 6 - 169448 -10.22 1 37.32 41.08 - -- - -- 45 .93 --0-.36 . 41 _ 42 74.41 2175 1_71623 10.29 142.25 41.57 46.11 3.39 _44.95 43 71.26 1767 173390 10.35 146.27 __ 41.95 46.26 7.02 48.98 44 68.24 1337 174727 10.39 149.32 _ 42.24 46 36 10 29 52 53 45 65.35 _ 942 _ 175670 _ 10.43 151.48 _ 42.45 _ . 46.44 . 12.82 . 55.27 - 46 62.59 605 176275 10.44 152.87 _ 42.58 46.49 14.54 57.12 47 59.94 3_28 _ 176603 10.46 153.63 _42.65 46.51 15.50 58.15 48 57.40 108 - 176711 10.46 153.88 - - 42.67 46.52 _ 15.82 58.49 49 54.97 -65 176645 10.46 153.73 -- -- 42.65 46.52 - 15.63 58.28 _ 50 52.65 -198 176447 10.45 153.27 42.61 46.50 15.04 57.65 51 50.42 -300 176146 10.44 152.58 _ 42.55 __ 46.48 14.17 56.72 52 - 48.29 -378 175768 10.43 151.71 42.47 46.45 13.10 55.57 53 46.24 -437 175332 10.41 150.71 _ 42.37 46.41 11.89 54.27 54 44.29 -482 174850 10.40 149.61 42.27 46.37 10.61 52.88 55 42.41 -516 174334 10.38 148.43 42.16 46.33 9.29 51.45 56 40.62 _ -542 173792 10.36 147.19 42.04 46.29 7.96 50.00 57 38.90 _ -563 _ 173229 10.35 _ 145.90 _ 41.92 46.24 6.66 48.58 58 37.25 -581 172648 10.33 -144.58 _ _ - 41.79 46.20 5.39 47.18 59 35.68 -596 172052 10.31 14322 41.66 _ 46.15 4.19 45.85 60 34.17 -611 171442 10.29 141.84 _ 41 53 46 10 3 07 44 59 32.72 426 170816 10.27 140.42 . 41.39 . 46.05 . 2.04 0 43.43 62 31.33 __ -642 170174 10.24 138.96 41.24 45.99 1.14 42.39 63 30.01 -663 169511 10.22 137.46 41.09 45.94 0.42 41.51 64 28.74 -690 _168820 10.20 135.91 40.94 45.88 0.00 40.94 65 27.52 -732 168088 10.18 134.26 40.77 45.82 .00 ----d 40.77 66 26.36 -795 167293 10.15 132.48 40.59 45.76 0.00 40.59 67 25.24 -854 166439 10.12 130.56 40.39 45.68 0.00 40.39 68 24.17 -909 _ 165530 10.09 128.53 40.18 _ 45.61 0.00 40.18 69 23.15 -961 164570 10.06 126.39 _ 39.96 - 45.53 0.00 39.96 -----70 22.17 -1009 163561 10.02 124.15 39.72 45.44 0.00 39.72 71 21.23 -1053 162508 9.99 _ 121.82 39.47 45.35 0.00 39.47 72 20.33 _-1094 161414 9.95 119.41 --3-9-.21 45.26 0.00 39.21 73 19.47 _ -1133 160281 9.91 116.92 _38.94 45.16 0.00 38.94 74 18.65 -1168 159114 9.87 114.36 38.65 _ 45.06 0.00 38.65 75 17.86 -1200 157914 9.83 111.75 38.35 44.96 0.00 38.35 _ 76 17.10 -1230 156684 9.79 109.08 38.04 44.85 0 00 38 04 77 16.38 -1256 155428 _ 9.75 106.36 37.73 44.74 . 0.00 . 37.73 78 15.69 - -1281 154147 9.70 103.61 37.40 44.63 _ 0. 00 37.40 79 15.02 _ -1303 152844 9.66 _ 100.82 _ 37.06 __ 44.51 _ 0 00 37 06 80 14.39 -1322 151522 - _ 9.61 --- 98.01 36.71 44.39 _ . f 0.00 . 36.71 - 81 13.78 -1339 50183 150183 9.57 95.18 _ 36.36 44.27 0.00 36.36 82 13.20 -1355 148828 _ 9.52 92.33 35.99 44.15 0.00 35.99 83 12.64 1368 147461 9.47 89.47 35.61 44.02 0.00 35.61 84 12.10 -1379 146082 9.42 86.61 35.23 43.90 0.00 35.23 Sheet: Alley, Williams, Carmen and King, Inc. Burlington, N.C. Wet Detention Pond Design (continued) Project: Deerfield Crossing Lot 4 Description: Water Quality Pond Design By: M. Reich Checked By: MDR 100 Year Desian Storm Routina (continuadl Time M min. Inflow (Q) cfs Additional Volume (OS) cu. ft. Total Storage (S) cu. ft. Stage (27 ft. Riser Discharge wel cfs Riser Discharge orlflce cis Barrel Discharge cfs Emergency Spillway weir cis Total Discharge cfs 85 11.59 -1388 144694 9.37 83.75 34.84 43.77 0.00 34.84 86 11.10 -1395 143300 9.32 80.89 34.44 43.64 0.00 34.44 _ 87 10.63 -1400 _ 141899 9.27 78.04 34.03 _ 43.51 _ 0.00 34.03 88 10.18 -1404 140496 9.22 75.21 33.61 43.37 0.00 33.61 89 9.75 -1406 139090 9.17 72.40 33.19 43.24 0.00 __ _ 33.19 90 9.34 -1406 137684 9.12 69.61 32.75 43.11 _ 0.00 32.75 91 8.94 -1405 136278 9.07 66.84 32.32 42.97 0.00 32.32 92 8.56 -1402 134876 9.02 64.11 31.87 42.83 0.00 31.87 93 8.20 -1398 133478 _ 8.97 61.41 31.41 42.70 0.00 31.41 94 7.85 -1393 132085 842 58.74 30.95 42.56 0.00 30.95 95 -- --- 7.52 -1386 130699 8.86 _ 56.12 __ 30.49 42.42 0.00 30.49 96 _ - 7.20 --- -1378 ---- 129321 ------- 8.81 -- 53.54 ----- 30.01 ------ 4228 0.00 - 30.01 97 6.90 -1368 127953 8.76 51.01 29.53 42.14 0.00 29.53 98 _ 6.61 -1358 126595 8.71 48.52 29.04 42.00 0.00 29.04 99 _ 6.33 -1346 125249 8.66 46.08 28.55 41.86 0.00 28.55 _1_00 6.06 --1333 _ 123916 8.61 43.70 28.05 41.72 0.00 28.05 _1_01 5.80 _-1319 122596 8.56 _ 41.38 _ 27.54 41.59 _ 0 .00 27.54 - 102 5.56 -1304 121292 8.51 39.11 27.03 _ 41.45 -----C60- 27.03 103 - -5.32 - -1288 - _ 120004 - 8.46 36.90 - _ 26.51 41.31 0.00 26.51 104 5.10 - _- -1271 -- 118733 -- 8.41 - - - 34.75 - - 25.98 41.17 0.00 - 25.98 105 4.88 - 1253 1 1747 9 8- M XIC7 32.67 5.45 25.45 -- 41.04 ---- 0.00 - 25.45 06 4.67 _-1234 116245 8.31 __ 30.65 24.92 40.90 _ 0.00 24.92 -107 - 4.48 -1215 115030 _ 8.26 28.70 _ 24.38 40.77 _ 0.00 24.38 108 4.29 -1194 113836 8.22 26_.81 23.83 40.64 _ 0.00 23.83 109 4.11 -1173 112664 8.17 24.99 23.28 40.50 0.00 23.28 110 3.93 -1150 111513 8.12 23.24 22.72 40.37 0.00 22.72 11_1 3.77 -1127 110386 8.08 21.55 22.16 40.25 0.00 21.55 112 3.61 -1067 109319 8.04 19.99 21.61 40.12 0.00 19.99 113 - 3.45 _ -983 108335 8.00 18.58 - _ 21.09 40.01 0.00 18.58 114 3.31 -908 107428 7.96 - ,- 17.31 ,-- 20.60 _ 39.91 0.00 17.31 115 3.17 _- - _ -840 106588 _ 7.93 16.15 20.13 39.81 0.00 16.15 _ ___ 116 _3.03 -779 ___105808 7.89 _ 19.68 38.72 0.00 15.10 117 2.91 -724 105084 7.86 14.14 _ 19.26 _ 39.63 0.00 14.14 118 2.78 - -674 104410 7.84 _ _ 13.26 18.85 _ 39.55 _ 0.00 13.26 119 2.66 -629 _103781 7.81 12.46 18.46 39.47 0.00 12.46 120 2.55 -588 103193 7.79 11.72 18.09 _ 39.40 0.00 11.72 121 2.44 -550 102643 7.76 11.05 17.73 39.34 0.00 _ 11.05 _ 122 2.34 -516 102127 7.74 10.42 17.39 39.28 0.00 10.42 123 2.24 -485 101642 7.72 9.84 _ 17.06 39.22 0.00 9.84 124 2.15 -456 101186 7.70 9.31 16.75 39.16 0.00 9.31 125 2.06 -430 100756 7.68 _8.81 16.45 39.11 0.00 8.81 126 1.97 406 100351 7.67 8.35 16.16 39.06 0.00 8.35 - 127 1.89 - -383 99%7 7.65 7.93 15.88 39.01 0.00 7.93 128 1.81 -363 99605 7.64 7.53 15.61 38.97 0.00 7.53 129 _ 1.73 -343 99262 7.62 7.16 15.35 38.9 2 0.00 7.16 130 1.66 -326 98936 7.61 6.81 15.09 _ 38.88 0.00 6.81 _ 131 _ 1.59 -309 98627 7.59 6.49 14.85 38.85 0.00 6.49 132 1.52 -294 98333 7.58 6.18 _ 14.61 38.81 0.00 6.18 Alley,lMiliams, Carmen and King, Inc. Burlington, N.C. Wet Detention Pond Design (continued) Project: Deerfi Description: Water Design By: M. Rei Lot 4 11 By: MDR 100 Year Desian Storm Routina lcnntinuaril -- Time m min. Inflow (Q) cfs Additional Volume (OS) cu. ft. Total Storage (S) cu. ft. Stage (Z) ft. Riser Discharge Wei cfs Riser Discharge orifice cfs Barrel Discharge cfs Emergency Spillway Wel cfs Total Discharge cis 133 1.45 -280 98053 7.57 5.90 14.39 38.77 0.00 5.90 134 1.39 -267 97786 7.56 5.63 _ 14.16 38.74 0.00 5.63 135 1.33 _ -254 97532 7.55 _ 5.38 13.95 38.71 _ _600 5.38 136 _ 1.28 -243 97289 7.54 5.14 _ 13.7 4 38.68 0.00 5.14 137 1.22 -232 97058 7.53 4.92 _ 13.54 38.65 0.00 _ 4.92 138 1.17 -222 96836 _ 7.52 4.71 1134 38.62 0.00 4.71 -139 1.12 -212 96624 7.51 _ 4.51 13.15 38.59 0.00 4.51 - 140 1.07 -203 96421 7.50 4.32 12.97 38.57 _ 0.00 4.32 141 1.03 -195 96226 7.49 4.14 - _ 12.79 38.54 0.00 4.14 142 0.99 --- -187 - 96039 7.48 ---- 3.97 ----- 12.61 38.52 ---- 0.00 3.97 143 0.94 ---- -179 95860 7.48 3.81 -- 12.44 38.50 -- 0.00 3.81 144 0.90 _ -172 95688 7.47 3.66 12.27 38.48 0.00 3.66 145 0.87 -166 95522 7.46 3.52 12.11 38.45 6.OD 3.52 T 146 _ 0.83 -159 95363 _ 7.46 _ 3.38 11.9 5 38.43 0.00 3.38 147 -- _ 0.79 - -153 95210 7.45 3.25 _ _ 11.80 38.41 0.00 3.25 148 0.76 - -148 _ 95062 .44 7.4 --- -- 3.13 - - - 11.65 - 38.40 0.00 - - 3.13 _149 0.73 -142 94920 7.44 11.50 38.38 3.01 150 0.70 - -137 94783 7.43 ----- 2.90 11.36 38.36 0.00 2.90 - 151 0.67 -132 94651 7.43 2.79 11.22 38.34 0.00 2.79 Alley, Williams, Caren and King, Inc. Burlington, N.C. Subject: Date: Thu, 17 Feb 2000 08:55:01 -0500 From: DPoulos@ecslimited.com To: todd.st.john@ncmail.net CC: john.domey@ncmail.net Todd, a 401 has been issued for Summit Properties of Alamance-DWQ Project 000013. condition #2 requires a final written stormwater management plan. this was submitted to the dwq with the pcn application. please let me know what else is required. thanks, denise 10H 02/17/2000 9:38 AM ENGINEERING CONSULTING SERVICES, LTD. Geotechnical - Construction Materials - Environmental January 4, 2000 Mr. John Domey North Carolina Department of Environment and Natural Resources Division of Water Quality Wetland/401 Unit 1621 Mail Service Center O ?p Raleigh, North Carolina 27699-1621 tJ Subject: Pre-Construction Notification Application Deerfield Crossing - Lot 4 Mebane, Alamance County, North Carolina ECS Project G-3653 PR AIL.- Dear i Dear Mr. Dorney: REcEI VE p Please find seven copies of the Pre-Construction Notification Application for the above referenced site. The site is approximately 6.3 acres in area and is located on Spring Forest Drive in Mebane (Figure 1). The site is to be commercially developed by Summit Properties of Alamance, LLC. A drained farm pond is located on the site. A portion of this pond was filled in 1996. A NWP 26 was issued for the site by the U.S. Army Corps of Engineers on July 18, 1996. This permit authorized 0.30 acres of impact to wetlands and streams. A copy of this permit is attached. As part of the proposed development, it has become necessary to fill the remainder of the farm pond. This will result in an additional 0.297 acres of wetland impact for which we are requesting a 401 Water Quality Certification. We understand that a stormwater management plan will be a condition of the 401 Water Quality Certification issued for the site. Therefore, we are proposing to construct a pond that will satisfy that requirement. Ms. Jennifer Frye with the Winston-Salem Regional Office of the NCDENR visited the site in December 1999. At that time, she stated that based on the minor amount of impact, mitigation would not be required. Therefore, a mitigation plan has not been included with this application. Please feel free to contact me at (336) 856-7150 if you have any questions concerning this request or if additional information is required. Thank you in advance for your timely consideration of this matter. Sincerely, ENGINEERING CONSULTING SERVICES, LTD. Denise M. Poulos, LSS Principal Scientist Attachment: Pre-Construction Notification Application i -- $475.00 Application Fee / 5-C Dundas Circle, Greensboro, NC 27407 - (336) 856-7150 - Fax (336) 856-7160 Offices: Washington, DC; Baltimore, MD; Frederick, MD; Richmond, VA; Norfolk, VA; Fredericksburg, VA; Danville, VA; Roanoke, VA; Williamsburg, VA; Raleigh/Durham, NC; Wilmington, NC; Charlotte, NC; Greensboro, NC; Greenville, SC; Atlanta, GA o oo l 3 DWQ ID: _ CORPS ACTION ID: _ NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #) _ PRE-CONSTRUCTION NOTIFICATION APPLICATION FOR NATIONWIDE PERMITS THAT REQUIRE: 1. NOTIFICATION TO THE CORPS OF ENGINEERS 2. APPLICATION FOR SECTION 401 CERTIFICATION 3. COORDINATION WITH THE NC DIVISION OF COASTAL MANAGEMENT SEND THE ORIGINAL AND (1) COPY OF THIS COMPLETED FORM TO THE APPROPRIATE FIELD OFFICE OF THE CORPS OF ENGINEERS (SEE AGENCY ADDRESSES SHEET). SEVEN (7) COPIES MUST BE SENT TO THE NC DIVISION OF WATER QUALITY, ATTN• JOHN DORNEY, 4401 REEDY CREEK ROAD, RALEIGH, NC 27607, PLEASE PRINT OR TYPE. 1. OWNER'S NAME: IMr. Paul Hoyle Summit Properties of Alamance 1 ?. 2. MAILING ADDRESS: 3928 Forest Oak Lane PAYME 1 SUBDIVISION NAME RECEIVED ?e CITY: Mebane STATE: NC ZIP CODE: 27302 •,% PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME (IF DIFFERENT FROM MAILING ADDRESS ABOVE): Deerfield Crossing. Hyiy 119, Mebane. NC 3. TELEPHONE NUMBER: (HOME) _ (WORK) (,336 85 4-5581 4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS, PHONE NUMBER: Denise M Poulos ECS Ltd 5-C Dundas Circle Greensboro. NC 27407 5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC MAP OR AERIAL PHOTOGRAPHY WITH SCALE): COUNTY: Alamance - NEAREST TOWN: Mebane SPECIFIC LOCATION (INCLUDE ROAD NUMBERS, LANDMARKS, ETC.) Spring Forest Drive off Hwy 119 6. IMPACTED OR NEAREST STREAM/RIVER: Tributary to Haw Creek RIVER BASIN: Haw/ ape Fear 7. (a) IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER, (SA), HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER SUPPLY (WS-I OR WS-II)? YES ? NO X IF YES, EXPLAIN: _ (b) IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES F? NO COASTAL COUNTIES), WHAT IS THE LAND USE PLAN (LUP) DESIGNATION? r?d?, (c) IF THE PROJECT IS LOCATED WITHIN A COASTAL COUNTY (SEE PAGE 7 FOR LIST OF II rlnce -rvr nn? - ......,r -___ -- 8. (a) HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON THIS PROJECT? YES X NO r-? IF YES, PROVIDE ACTION I.D. NUMBER OF PREVIOUS PERMIT AND ANY ADDITIONAL INFORMATION ( INCLUDE PHOTOCOPY OF 401 CERTIFICATION): 199602416 (b) ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE FUTURE? YES ? NO X IF YES, DESCRIBE ANTICIPATED WORK: _ 9. (a) ESTIMATED TOTAL NUMBERS OF ACRES IN TRACT OF LAND: 63 Acres (b) ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE: Q= 10. (a) NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY: FILLING: 0.297 EXCAVATION: _ FLOODING: _ OTHER : DRAINAGE : _ TOTAL ACRES TO BE IMPACTED: 0.297 (b) (1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT (IF RELOCATED, PROVIDE DISTANCE BOTH BEFORE AND AFTER RELOCATION: LENGTH BEFORE: _ FT AFTER: _ FT WIDTH BEFORE (based on normal high water contours): _ FT AVERAGE DEPTH BEFORE: _ FT AFTER: _ FT (b) (2) STREAM CHANNEL IMPACTS WILL RESULT FROM: (CHECK ALL THAT APPLY) OPEN CHANNEL RELOCATION: _ PLACEMENT OF PIPE IN CHANNEL: _ CHANNEL EXCAVATION: _ CONSTRUCTION OF A DAM/FLOODING: _ OTHER: 11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE WATERSHED DRAINING TO THE POND? 15.5 acres WHAT IS THE EXPECTED POND SURFACE AREA? 19.201 square feet 12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF MECHANICAL EQUIPMENT TO BE USED? (ATTACH PLANS; 81/2 BY 11 DRAWINGS ONLY) The site is to be developed with a Lowes and other retail businesses and parking areas This will require the >>se of bulldozers excavators loaders. trucks, etc. 13. PURPOSE OF PROPOSED WORK: The purpose of the work is to construct retail buildings and parking areas on the site. 14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED OUT IN WETLANDS (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND IMPACTS) Due to the size of the site it is necessary to fill the wetland in order to develop the site A stormwater pond will be constructed to ensure that water quality will not be degraded. 15. YOU ARE REQUIRED TO CONTACT THE US FISH AND WILDLIFE SERVICE AND/OR NATIONAL MARINE FISHERIES SERVICE REGARDING THE PRESENCE OF ANY FEDERALLY LISTED OR PROPOSED FOR LISTING ENDANGERED OR THREATENED SPECIES OR CRITICAL HABITAT IN THE PERMIT AREA THAT MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE CONTACTED: _ 16. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC PRESERVATION OFFICER (SHPO) REGARDING THE PRESENCE OF HISTORIC PROPERTIES IN THE PERMIT AREA WHICH MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE CONTACTED _. SOURCE: USGS TOPOGRAPHIC MAP, MEBANE, NC QUADRANGLE, DATED 1969 AND REVISED 1994 SCALE: I"= 2,000' ENGINEERING CONSULTING SERV[CES,LTD FIGURE 1 SITE LOCATION MAP DEERFIELD CROSSING MEBANE, NC ECS PROJECT G-3653 U.S. ARMY CORPS OF ENGINEERS WILMINGTON DISTRICT O Action ID. 199602416 County Alamance GENERAL PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION Property Owner/Agent Summit Properties of Alamanee Co LLC / Deerfield Crossing Address c/o Mr. Ken Walker. 3948 Forest Oaks Lane Mebane NC 2730 Telephone No. (910)275-0911 Size and Location of project (waterway, road name/number, town, etc.) Deerfield Crossing development site located off of NC 119 adjacent t an unnamed tributary o Haw Creek. near Mebane in Alamance County. North Carolina - Description of Activity Proposed development to include the relocation of two small streams (culvert and fill) and the partial fill of a drained pond that will result in approximately _0 0,30 acres of impacts tot the -jurisdictional waters of unnamed above headwater tributaries of Haw Creek X_Section 404 (Clean Water Act, 33 USC 1344) only. Section 10 (River and Harbor Act of 1899) only. Section 404 and Section 10. NWP 26 Nationwide Permit Number. Any violation of the conditions of the Regional General or Nationwide Permit referenced above may subject the permittee to a stop work order, a restoration order, and/or appropriate legal action. This Department of the Army Regional General/Nationwide Permit verification does not relieve the undersigned permittee of the responsibility to obtain any other required Federal, State, or local approvals/permits. The permittee may need to contact appropriate State and local agencies before beginning work. Regulatory Project Manager Date July 18. 1996 5 SURVEY PLATS, FIELD SKETCH, WETLAND-DELINEATION FORM, ETC., MUST BE ATTACHED TO THE FILE COPY OF THIS FORM, IF REQUIRED OR AVAILABLE.