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HomeMy WebLinkAbout20190560 Ver 1_More Info Received_20190801Moore, Andrew W From: Anna Priest <anna@cwenv.com> Sent: Thursday, August 1, 2019 10:01 AM To: 'Brown, David W CIV USARMY CESAW (US)'; Moore, Andrew W Cc: Leslie, Andrea J Subject: [External] Bradley Creek Reservoir Dredging - Temporary Ford Construction External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to report.spam@nc.gov W1 After speaking with Mr. Brown on Monday, July 29, 2019 regarding the email below, I would like to request to reverify our existing NWP 3 for the Bradley Creek reservoir project to include additional temporary impacts for the installation of a temporary ford to access the Bradley Creek reservoir for the previously permitted dredging project (SAW -2019-00739 and DWR# 19-0560). The coordinates of the proposed temporary ford location are 35.371178, -82.671211. The length of stream that would be impacted is 20 feet, however, this area is already included in the temporary dewatering impacts listed in the PCN application. The width of the stream at this location is 35 feet. At this location, Bradley Creek has been recently scoured to an increased width due to multiple large rain events, which is why a temporary bridge was being considered instead of fording the creek without modifications. Bradley Creek was previously navigable for machinery and dump truck prior to the rain events but due to the current condition, modifications are necessary for access. The temporary ford will be constructed of geotextile fabric and washed ballast stone in the dry creek bed after the reservoir dewatering is in process. The City of Hendersonville will construct the ford to the specifications from the NC DEQ Sediment and Erosion Control Manual, Index 6 - Temporary Ford (figure inserted below). Once the dredging project is complete, the temporary ford will be removed and the site will be left in a stable condition. Please do not hesitate to contact me with any questions, comments, or concerns. Thank you in advance for your prompt attention to this matter. We are aware of the upcoming trout moratorium and are working diligently with our client to ensure timely project completion. i 5' max hank height Stream Channel fIaLl Ip' At k Stone approach section _1 max, slope on road 5 over otextile fabric Slirfnro Flnw 5+rr#ace Flow Diversions clean Stone Geo#extile Fabric Figure 6.74a Awell constructed ford offers little obsbuabon to flow while safely handling heavy loading. Thank you, Anna Priest, PWS ClearWater Environmental Consultants, Inc. 32 Clayton St Asheville, NC 28801 828.698.9800 x 301 From: Anna Priest Sent: Thursday, July 25, 2019 6:04 PM To: 'Brown, David W CIV USARMY CESAW (US)' <David.W.Brown@usace.army.mil>; Moore, Andrew W <andrew.w.moore@ncdenr.gov> Subject: Bradley Creek Reservoir Dredging Mr. Brown and Mr. Moore, 4 I met the City of Hendersonville employees on site to discuss the upcoming Bradley Creek Reservoir dredging project that has received both 404 and 401 permits from your respective agencies. Options for the creek crossing to access the reservoir were discussed today (see attached image). A temporary bridge was planned to be installed to span Bradley Creek to allow dump trucks and heavy machinery to access the reservoir. Upon further investigation it was determined that a 50 foot bridge would be needed to span the width of Bradley Creek. A larger tractor trailer truck would be needed to haul the temporary bridge to the site. Due to limited accessibility and narrowness of forest service roads, the City has decided to pursue other options. The preferred option would include a temporary fording installation. The ford improvement would follow the State's guidelines on temporary fording found here. The existing streambed is mostly bedrock and large cobble. If this option is feasible to you all, we would need to modify the existing permit to include NWP 33 for temporary construction access. Please let me know your thoughts on this and how would should proceed. Thank you, Anna Priest, PWS ClearWater Environmental Consultants, Inc. 32 Clayton St Asheville, NC 28801 828.698.9800 x 301