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Home My WebLink About20071556 Ver 2_More Info Received_20141017CLearWaLer C1earWater Environmental Consultants, Inc. October 15, 2014 www.cwenv.com Ms. Karen Higgins NC DWR, 401 & Buffer Permitting Unit 512 N. Salisbury Street, 9a` Floor Raleigh, North Carolina 27604 RE: Big Ridge Request for Additional Information Jackson County, North Carolina DWR # 07 -1556 Dear Ms. Higgins, °CTI 720 ,4 0 Please reference the comments received on September 22, 2014 (Attachment A) sent by the NC Division of Water Resources (DWR) in response to the Nationwide Permit Application for the site known as Big Ridge. The DWR has several comments regarding the proposed project. Each comment is discussed below. DWR Comment: "Please provide details regarding culvert removal and modifications, including: a. Step to work in the dry. b. Stream channel reconstruction. Current impacts at Impact C2 are approximately 80 linear feet. The culvert is overly wide in this location and can be reduced in length to 40 linear feet. As requested, the work would be done in the dry. Sand bags would be placed across the stream in an appropriate location upstream of the existing culvert. Water would back up behind the sand bags and be diverted around the crossing location via a black corrugated pipe. The pipe outlet would be downstream of the crossing location. Once the stream segment is dewatered, fill covering the culvert would be removed and the culvert would be shortened. The day - lighted stream banks would be sloped back, matted, and seeded with a native seed mix (Figure 1). Culvert removals at C9, CIO, and C 11 would be treated the same way. Contractors would remove the culvert at C 11 first, followed by C 10, and then C9. Approximately 60 linear feet of stream channel was relocated near the entrance of the site. The stream would be put back into its original location. The reconstructed stream channel would be constructed in the dry starting at an existing riprap /soil berm to the existing culvert under Highway 107. The new stream banks would be sloped back, matted, and seeded with a native seed mix (Figure 1). Once the reconstruction is complete, the riprap berm would be 224 South Grove Street, Suite F Hendersonville, NC 28792 828 - 698 -9800 Tel 828 - 698 -9003 Fax Ms Karen,Higgms 10%15/2014 Page 2 of 3 removed to allow water to flow into the reconstructed channel and through the existing culvert under Highway 107 to the Tuckasegee River. c. Splash pool enhancement where pipes are perched, where appropriate. Culvert outlet protection, in the form of splash rocks, would be placed below perched culverts where appropriate if active erosion is occurring. Splash rocks would be, stone large enough to withstand high water flows. Splash rocks would be placed even with the culvert outlet so that water would cascade over the rock and, into the;stream. d. Measures to prevent sediment loss to stream and turbidity impacts." Road cuts within the project area are stable and no longer contributing significant sediment to stream channels on site. Sediment and erosion control measures (i.e. silt ,fencing) will be utilized at areas proposed for construction and, any future ground disturbance would be stabilized immediately with matting and seeding. DWR Comment: "Water Quality Certification 3890 Condition 12 and ,Attachment A require Stormwater Management planning, including the determination as to whether the project is considered Low Density or High Density. No information has been provided to meet this condition. Please provide the ,required details per Attachment, A for such a determination and the stormwater management BMPs to be utilized." At this time, Amazing Grace, LLC has no intention of developing the,property as a ,subdivision, The current project purpose is to provide access Ito three lots on the property and resol've'the outstanding violation. During an on -site meeting on September 12, 2014 with Chuck Cranford of DWR, J Mr. Cranford asked that the applicant estimate-the impervious surface area at the site, if the residential development were to be complete. The Mount Wilderness project area is comprised ,of approximately 360 acres. A site plan from 2007 proposes 74 lots ranging from approximately 1.5 -8.2 acres for an average lot size of 3.2 acres. Potential house footprints are unknown; however, if a very liberal assumption is made that an average of 10,000 square feet of impervious surface area would be present on each, lot, that yields a total impervious surface area of 17 acres for the project site. Impervious surface area would 'likely be much less; however, total impervious surface percentage based on the assumptions above would be 4.7%. In, this instance, the development would be considered low density. Although additional development is not proposed at the site, should the site be developed in the, future, stormwater runoff from built upon areas would be� transported by vegetated conveyances or alternative BMPs designed in accordance with the NC DWQ Stormwater Best Management Practices Manual and approved by the DWR. No collection systems would be utilized at the site. Ms Karen Higgms 10/15/2014 Page 3 of 3 The information submitted in this package addresses all issues set forth in the DWR comment letter dated September 22, 2014. Should you have any questions or comments concerning this project please do not hesitate to contact °me,at 828 - 698 -9800. Sincerely, Rebekah L. Newton R. Clement Riddle, P.W.S. Project Biologist Principal Big Ridge - Stream Matting and Sloping Detail ANCHOR MATTING IN 6" TRENCH SMOOTH SURFACE, REMOVE ALL DEBRIS AND SEED /MULCH BEFORE PLACING MATTING Drawn by RL'N 10 14 14,,CEC Project# 742 = COCONUT STRAW MATTING PLACED FLUSH WITH BANK SURFACE, LAP OVER DOWNSTREAM /DOWN SLOPE SEAMS 12" WOOD STAKE PLACED, IN 3' 0 C DIAMOND PATTERN %MATTIN ACN'H'ORED 1' % I BELOW STREAM BED SECTION 0 0 05 1 2 Miles Jackson County, tear Stream Matting North Carolina =� and Sloping Detail 224 South -Grove Street, SuiteT Figure 1 Hendersonville. North Carolina 28792 Attachment A DWR Comment Letter (dated September 22, 20`14) AEiAE � FILE- NCDENR North Carolina Department of'Erivironment and' Natural Resources Pat McCrory Govemor September, 22,, 2014 Roseanne Giordani Amazing Grace Properties, LLC 100 Congress Ave., Suite 1440 Austin, TX 78701 Subject: Request for Additional Information Big Ridge Dear Ms. Giordani: John E. Skvarla, III Secretary DWQ Project # 07- 15566V2 Jackson County The Division of Water Resources (Division) has performed a preliminary review of a 401 Water Quality Certification application submitted for the above referenced project. The Division hasAetermined that,your Application is incomplete and cannot be processed. The�applicatiou is on -hold until all of the following information is received: Provide details regarding,culvert removal and modifications, including: • Steps to work in -the dry • Stream channel re- construction (e.g., matting, vegetation, etc.) • Splash pool enhancement where pipes are perched, where appropriate • Measures to prevent sediment loss to streams and turbidity impacts 2. Water Quality Certification 3890 Condition 12 and Attachment,A require-Stormwater Management planning,, including the determination as to whether the project is considered Low Density or High Density. No information has been provided to meet this condition. Please provide the required details per Attachment A for such a determination and the stormwater management BMPS to be utilized. If all of the °requested information is not received in writing within 30 calendar days of receipt of this letter, the Division will be unable to approve-the application and it will`be returned. The return of this project will necessitate reapplication to the Division for approval, including a complete application package and the , appropriate fee. Please, respond in,writing within 30 calendar days of receipt of this letter by sending four copies of all of the Above requested information the 401 & Buffer Permitting Unit: Water Quality Regional Operations — Asheville Regional Office 2090 U.S. Highway 70, Swannanoa, North Carolina 28778 Phone: 828 - 2984500 FAX 828 -299 -7043 Intemet,hitpJlportii nodenr orglweblwq An Equal Opportunity 1 Atffmrabve Action Employer Roseanne Ciordani September 22, 2014 Page 2,of 2 401 and Buffer Permitting Unit 1617 Mail Service Center Raleigh, NC 27699 -1617 Please be aware that you have no authorization under the Section 401 of the Clean Water Act for this activity and any work,done within waters of the state may be a violation of North Carolina,Geneml Statutes and Administrative Code.,Please call Chuck Cranford (828) 296 -4650, if you have any questions. Sincerely; G. Landon Davidson, P.G., Regional Supervisor Water Quality Regional Operations Asheville _Regional' Office cc: DWR WHICHRO 401 files DWR -401 & Buffer Permitting Unit ec: Rebekah Newton — Clearwater David Brown - USACE 0 \WR \WQ\Tackson\401s\Non -DMBig RidgeWddlnfo922.14.docx