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HomeMy WebLinkAbout20050949 Ver 1_More Info Received_20051107 ROBIN MAYCOCK LITTLE 5409 NEW REBEL COURT, YOUNGSVILLE, NC 27596 919-418-7645 November 4, 2005 Mr. Monty Matthews Raleigh Regulatory Field Office U.S. Army Corps of Engineers 6508 Falls of the Neuse Road, Suite 120 Raleigh, NC 27615 Subject: Approved Stormwater Plans and Proposed Site Plans for Lots 18 and 19 of Partners Equity Group Subdivision, Industrial Park Road, Smithfield, Johnston County. Action ID# 200520934, DWQ Project # 05-0949 Dear Mr. Matthews: Enclosed are two copies of the site plans for the subject project, as requested on August 25, 2005. They show the proposed wetland impacts, including fill slopes, with the proposed lot layout shown as an overlay on the site plans. All jurisdictional wetlands, isolated or non-isolated, and streams or other waters of the State are shown as overlays on the site plans. Also enclosed are two copies of the plans and one copy of the calculations for the approved and existing stormwater management practices, which were designed to accommodate stormwater runoff for the entire 51-acre property, at maximum impervious surface development. (See correspondence dated August 3 and July 29, 1999) and finally, the approval letter from the Ecosystem Enhancement Program for In-Lieu Fee Mitigation, dated August 5, 2005, is also enclosed for your records. By copy of this letter we also submit seven copies of each of the above mentioned enclosures, with the exception of the Drainage Pond and Erosion Control Calculations, prepared by McKim and Creed Engineers, P.A. in March 1999, to the Division of Water Quality for review. The Ecosystem Enhancement Program is interested in coordinating with Mr. Shallcross on the stormwater detention system currently in place in order to design a restoration plan for Buffalo Creek immediately downstream of the subject property. If you have any questions or need any additional information, do not hesitate to contact Mr. John Shallcross at 919-934-3852 or Ms. Robin Maycock Little at 919-418-7645. Si rely, ??Uso(e_ Robin Maycock Little CC: Mr. John Shallcross Ms. Cyndi Karoly, DWQ Mr. Mike Horan, DWQ Regional Office ?i r -0 v n2: m O x O y m zv < ?w°{ rma -, ??-o m .o ao tx) ?c N TP A m .. 00 is c "" z? 2c m W W N? m co N i - N o M rt Z 0 ?I: ?v? 8p8 Igs (N) u 0 s ?13 rri O? `J O?J vJ O O y N 0 5 p 'l? zT y k? N R 844 1 O 3 00 pv f/1 N ? ? Ny m m v Z K zm m O MEN I N m Z P F N o M -u M -u D D z 0 0 0 9 i PRELIMINARY SITE PLAN FOR WETLAND MITIGATION DATE: SEPTEMBER 2005 LOTS 18 & 19 - PARTNERS EQUITY GROUP SUBDIVISION SCALE: 1 ° = 60' SITE INFORMATION DEVELOPER/OWNER INFORMATION DRAWN BY: BRL LLC CITY OR TOWN, COUNTY & STATE: SMITHFIELD, JOHNSTON CO., NC OWNER: PARTNERS EQUITY GROUP, TaEPHONE TOWNSHIP, COUNTY, & STATE: ADDRESS CONTACT: JOHN SHALLCROSS, JR. . Po eox 1524 119 934.9sa-39s2( 52( o) CHECKED BY: BRL NC PIN#: 2604-10-8014&2603-10,8739 ZONING: B-3 SUD SMITHFIELD, NC 27577 919360-5M Ml n 0 i August 3, 1999 Mr. Todd St. John NCDENR - Division of Water Quality 4401 Reedy Creek Rd. Raleigh, NC 27607 M&C 1319-0001.OR RE: Response To Comments for Partners Equity Detention Pond - DWQ Project No. 970656 Dear Mr. St. John: In response to the comments from the review of the stormwater management plan and detention basin, we are providing the additional information requested in your letter dated July 29, 1999. 1. Permanent Water Quality Pool, Temporary Water Quality Pool The volumes for the forebays, permanent pool and temporary pool provided in the "401 Wet Detention Basin Work Sheet" do not appear to reflect the actual volumes reflected by the plans. As such, the volumes indicated in the "Work Sheet" would not be adequate to meet the NCDENR Stormwater Best Management Manual's design requirements. However, the actual volumes provided in the plans may be adequate. There was a mistake ion the calculation of the volumes that you noted. The correct information should be as follows: Bottom Elevation = 140.00 Permanent Pool Elevation = 143.00 Temporary Pool Elevation = 145.35 Permanent Pool Area = 49658 sf Drainage Basin = 50.9 ac. Impervious Area = 20.4 ac. Permanent Pool Volume = 89394 cf Temporary Pool Volume = 281,569 cf Forebay Volume =19846 cf 2. Emergency Drain An emergency drain or similar mechanism must be provided to draw down the permanent pool volume. Please specify this on the engineering plans. 0:\1319\0001 \10\080399.OWQ.doc Page 2 Per our conversation, we have provided a note on the plans, requiring the owner to provide a pump to draw down the permanent pool should it be necessary. 3. Sediment Removal If the basin is proposed to be used as a sediment basin during construction, the plans must clearly indicate that accumulated sediment will be removed prior to implementation as a wet detention basin. We have provided a note in the construction sequence, as well as on the erosion control plan, stating that all accumulated sediment must be removed and proper grades achieved, prior to implementing as a wet detention basin. 4. Drainage Area Please indicate the drainage area including offsite drainage to the basin. We have enclosed a delineated drainage map showing the drainage patterns of the proposed detention basin. On and offsite flows are shown. . 5. Stormwater Flow to Remaining Wetlannds As we discussed in our phone conversation today, the 401 Water Quality Certification issued September 4, 1997 for this project requires that some of the stormwater be diverted to the remaining wetlands. After consulting with Staff from this Office, I recommend that 3 acres of impervious surface be directed to the existing 3 acres of wetlands. The runoff should enter the wetlands as diffuse or sheet flow at non-erosive or channel forming velocities. Please document the methods used to achieve the above. Diversion of 3 acres of drainage has been shown on the construction plans. We feel this provides you with the requested additional information required. We appreciate your comments and hope this will help you in completing your final technical review. Should you have any questions, or need any additional information, please feel free to call me at 233-8091. Q:\1319\0001 \10\OB0399.DWQ.doc y r Page 3 Sincerely, McKIM & CREED Grant Livengood, E.I. /gml Q:\131910001 \10\080399. DWQ.doc State of North Carolina Department of Environment and Natural Resources Division ofWater Quality James B. Hunt, Jr., Governor. Wayne McDevitt, Secretary Kerr T. Stevens, Director Mr. Grant Livengood McKim and Creed Engineers 5625 Dillard Road, Suite 117 Cary, NC 27511 Dear Mr. Livengood: Division of Water Quantity July 29, 1999 Subject: Partners Equity DWQ Project No. 970656 Johnston County RECEIVED AUG - 2 1999 Awl . 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: 1. Permanent Water Quality Pool, Temporary Water Quality Pool The volumes for the forebays, permanent pool and temporary pool provided in the "401 Wet Detention Basin Work Sheet" do not appear to reflect the actual volumes reflected by the plans. As such, the volumes indicated in the "Work Sheet" would not be adequate to meet the NCDENR Stormwater Best Management Manual's design requirements. However, the actual volumes provided in the plans may be adequate. 2. Emergency Drain An emergency drain or similar mechanism must be provided to draw down the permanent pool volume. Please specify this on the engineering plans. 3. Sediment Removal If the basin is proposed to be used as a sediment basin during construction, the plans must clearly indicate that accumulated sediment will be removed prior to implementation as a wet detention basin. 4. Drainage Area Please delineate the drainage area including offsite drainage to the basin. 5. Stormwater Flow to Remaining Wetlands As we discussed in our phone conversation today, the 401 Water Quality Certification issued September 4, 1997 for this project requires that some of the.stormwater be diverted to the remaining wetlands. After consulting with Staff from this Office, I recommend that 3 acres of impervious 4401 Reedy Creek Road, Raleigh, NC 27607 Telephone 919-733-1786 FAX 919-733-9959 An Equal Opportunity Affirmative Action Employer . 50% recycled/ 10% post-consumer paper r ? t PROGRAM August 5, 2005 John Shalcross, Jr. Partners Equity Group P.O. Box 1089 Smithfield, NC 27577 Project: Partners Equity Group Subdivision, Lot 18 & 19 County: Johnston The purpose of this letter is to notify you that the North Carolina Ecosystem Enhancement Program (NC EEP) is willing to accept payment for impacts associated with the above referenced project. Please note that this decision does not assure that the payment will be approved by the permit issuing agencies as mitigation for project impacts. It is the responsibility of the applicant to contact these agencies to determine if payment to the NC-:EEP will be approved. This acceptance is valid for six months from the date of this letter. If we have not received a copy of the issued 404 PermitA01 Certification within this time frame, this acceptance will expire. It is the applicant's responsibility to send copies of the 404/401/CAMA permits to NC EEP. Once NC EEP receives a copy of the 404 Permit and/or the 401 Certification an invoice will be issued and payment must be made. Based on the information supplied by you the impacts that may require compensatory mitigation are summarized in the following table. River Basin Wetlands Stream Buffer Buffer Cataloging (Acres) (Linear Feet) Zone 1 Zone 2 Unit (Sq. Ft.) (Sq. Ft.) Ri arian ? Non-Ri arian Coastal Marsh Cold Cool Warm Neuse J 0 1.9 0 0 0 0 0 0 03020201 I I Upon receipt of payment, EEP will take responsibility for providing the compensatory mitigation for the permitted impacts up to a 2:1 ratio, (buffers, Zone 1 at a 3:1 ratio and Zone 2 at a 1.5:1 ratio). The type and amount of the compensatory mitigation will be as specified in the Section 404 Permit and/or 401 Water Quality Certification, and/or CAMA Permit. The mitigation will be performed in accordance with the Memorandum of Understanding between the N. C. Department of Environment and Natural Resources and the U. S. Army Corps of Engineers dated November 4, 1998. If you have any questions or need additional information, please contact Carol Shaw at (919) 733-5205. Sincerely, .9 rDMam. . Gilmore, PE Director cc: Cyndi Karoly, Wetlands/401 Unit Andrea Wade, USACE - Raleigh Eric Kulz, DWQ Regional Office - Raleigh File Rest0dKg... E ... Pro ow Stag dCDENR North Carolina Ecosystem Enhancement Program, 1652 Mail Service Center, Raleigh, NC 27699-1652 / 91 9-71 5-0476 / www.nceep.net