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Home My WebLink About20191577 Ver 1_Sediment Loss Report_20210331DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1 F5 CLerWaer _„„). ClearWater Environmental Consultants, Inc. www.cwenv.com March 31, 2021 Mr. Andrew Moore NC Division of Water Resources 2090 US Highway 70 Swannanoa, North Carolina 28778 RE: Self -Reporting — Sediment Removal Project Ranger - Biltmore Farms Bridge and Access Road Buncombe County, North Carolina Dear Mr. Moore, At the request of Biltmore Farms, Inc. ClearWater Environmental Consultants, Inc. (CEC) conducted a site inspection on March 29, 2021 at the Project Ranger site located in Buncombe County (Attachment A). The purpose of this visit was to evaluate erosion and off -site sedimentation concerns. Representative photographs of the site are included in this report (Attachment B). During a recent rain event occurring the night of Thursday March 26, 2021 the site received approximately 3 inches of rain within a 12-hour span. This rain event led to off -site sedimentation entering three unnamed tributaries to the French Broad River. CEC documented sediment deposition ranging from 1-7 inches in the following locations: • Stream S 1 immediately south of the causeway construction (Photos 1 & 2). Sediment was observed 2-7 inches deep in the stream and in the adject wetlands. • Stream S2 immediately north of the causeway construction (Photos 3-6). Minor sediment was observed in pockets 1-3 inches deep in the stream and in the adject wetlands. • Stream S3 between Biltmore Farms and Pratt and Whitney construction (Photos 7-12). Sediment was observed 2-6 inches deep in the stream bed, in the old inline pond and in adject wetlands. It should be noted that off project (non-Biltmore Farms) releases were observed contributing sediment to S3. While onsite CEC observed a crew associated with Pratt and Whitney construction removing sediment from the lower end of S3 and the northern confluence to S3 shown on Attachment A. CEC highly recommends that the sediment within the streams be removed immediately. Wetland systems are capable of handling some sediment accumulation, and CEC advises sediment removal from a wetland only if the accumulation is such that the wetland system is essentially unable to recover through natural processes. In this case, sediment within wetlands should be removed where depths of sediment are greater than 1-2 inches. Sediment should be removed from the unnamed tributaries to the French Broad River and adjacent wetlands by hand via the use of shovels and buckets. Sediment removed should be relocated to 145 7th Avenue West, Suite B Hendersonville, NC 28792 828-698-9800 Tel DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1 F5 Page 2 of 2 March 31, 2021 upland locations at least 30 feet from jurisdictional water and stabilized by a silt fence perimeter and a layer of straw seeded with annual rye grass. Please do not hesitate to contact us at 828-698-9800 if you have any questions or comments. Sincerely, p—DocuSigned by: '—AE9231 C 42D... Britten William Yant Biologist cc: Stan Aiken, N.C. DEMLR Shawna Riddle, N.C. DEMLR LDocuSigned by: -2• CA 2,adk 9F7DC85 F.7 R. emen ddle, P.W.S. Principal DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1F5 Attachment A Sediment Removal Location Map DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1F5 Biltmore Farms Bridge and Access Road • Sediment Source Sediment Observed 3.29.21 Sediment Path Stream Culvert Linear Wetland MII Wetland Open Water CEC Delineation Boundary Contours 4ft Drawn by: BWY 3.31.21; CEC Project#,303 e Off -Project Release ti(Not Biltmore Farms) Biltmore Farms Not Responsable for Sediment From Norhtern Tributary Previously Permitted Wetland Fill Stream Si 1 Sediment 2-7 inches C•,,*`\‘'`II- ...... � To Be Removed �.f" /11 Buncombe County, North Carolina CLearWater 32 Clayton Street Asheville, North Carolina 28801 Off -Project Release (Not Biltmore Farms) Contributing to Sedimentation Stream S3 Sediment 2-6 inches To Be Removed Sediment Location Map Field Visit - 3.29.2021 Attachment A DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1F5 Attachment B Representative Photographs (March 29, 2021) DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1 F5 Photo 1: Sediment overwhelmed erosion control measure above S 1 during recent storm event. Photo 2: 2-7 inches of sediment to be removed from S1 and adjacent wetland. View facing upstream. •uieansdn u!ouJ Main •putpaM Tuaaefpe pine ZS uzo.Tj paAOUTaa aq TuauJTpas Jo sagou! E-T :p ()Toad •.uana uT.IMMS 111300.1 'uT.znp ZS anoge 3J11se3uT'0I1110O uotso.Ta pauTiaunnaano luauupaS : £ onoud 5I6o99LoZ8b6-o996-bLbb-LRLb-3bLaJbaa :al adoIanu3 u6ignooa DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1F5 Photo 5: Sediment overwhelmed erosion control measure at S2 road crossing during recent storm event. Photo 6: 1-3 inches of sediment to be removed from S2 and adjacent wetland. View facing upstream. DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1F5 Photo 7: Sediment overwhelmed erosion control measure above S3 during recent storm event. Photo 8: 2-6 inches of sediment to be removed from S3. View facing upstream. DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1F5 Photo 9: Old inline pond has trapped sediment from the recent release. An off -project (non-Biltmore Farms) release contributed significant sediment to the S3 pond. Photo 10: S3 outfall below old inline pond. 2-6 inches of sediment to be removed from S3. View facing upstream. DocuSign Envelope ID: DD4FD74E-47E7-4474-956C-9482C766C1F5 Photo 11: 2-6 inches of sediment to be removed from S3 and adject wetlands. View facing downstream. Photo 12: 2-6 inches of sediment to be removed from S3 and adject wetlands. View facing downstream.