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Home My WebLink AboutRE Richmond County A Basin (5) Strickland, Bev From:Paugh, Leilani Y Sent:Monday, August 22, 2016 11:19 AM To:Wrenn, Brian L Subject:RE: Richmond County A Basin Yes that would be good. Let me call Andy LeiLani Paugh ICI/OSM Group Supervisor 919 707 6146 lpaugh@ncdot.gov NCDOT Project Development & Environmental Analysis 1020 Birch Ridge Dr. Raleigh, NC 27610 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Wrenn, Brian L Sent: Monday, August 22, 2016 11:09 AM To: Paugh, Leilani Y Subject: RE: Richmond County A Basin Are you looking for some time today? I’m headed to Asheville around 2 pm, but could conference some time before then. Otherwise, Friday will be the next earliest time. Thanks, Brian Wrenn 919-707-8792 (office) 919-710-6516 (mobile) From: Paugh, Leilani Y Sent: Monday, August 22, 2016 10:58 AM To: Wrenn, Brian L <brian.wrenn@ncdenr.gov>; Williams, Andrew E SAW <Andrew.E.Williams2@usace.army.mil> Cc: King, Art C <acking@ncdot.gov>; Griffin, Randy W <rgriffin@ncdot.gov>; Cail, William G <gcail@ncdot.gov> Subject: RE: Richmond County A Basin Andy and Brian Do you have time to have a conference call about this project? LeiLani Paugh 1 ICI/OSM Group Supervisor 919 707 6146 lpaugh@ncdot.gov NCDOT Project Development & Environmental Analysis 1020 Birch Ridge Dr. Raleigh, NC 27610 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Wrenn, Brian L Sent: Monday, August 22, 2016 9:54 AM To: Paugh, Leilani Y; Williams, Andrew E SAW Cc: King, Art C; Griffin, Randy W; Cail, William G Subject: RE: Richmond County A Basin Leilani, Thanks for providing the proposal. This is an unusual situation from a regulatory perspective. This basin was originally installed to capture sediment released as part of a slope failure. The thought process at the time was instead of sending in a bucket brigade to clean up sediment deposited along roughly 0.5 mi. of stream, the agencies would allow temporary in-stream treatment to capture the sediment. The ultimate plan was removal of the captured sediment from the basin and restoration of the channel (in the basin footprint). With that historical summary in mind, it sounds like your proposal does not include a clean out component. Is NCDOT proposing to leave the sediment in place? Will channel restoration occur naturally as opposed to a constructed channel based on up and downstream channel dimensions? I’m happy to meet to discuss this in further detail if that is something you’re interested in. Thanks, Brian Wrenn 919-707-8792 (office) 919-710-6516 (mobile) From: Paugh, Leilani Y Sent: Friday, August 19, 2016 3:21 PM To: Williams, Andrew E SAW <Andrew.E.Williams2@usace.army.mil>; Wrenn, Brian L <brian.wrenn@ncdenr.gov> Cc: King, Art C <acking@ncdot.gov>; Griffin, Randy W <rgriffin@ncdot.gov>; Cail, William G <gcail@ncdot.gov> Subject: Richmond County A Basin Andy and Brian Randy and I have reviewed the site with Division and Hydraulics. The stream is fairly stable where it enters the site and then divides into several channels where the willows have established. The flow continues through the cattails and then dumps into the ponded area at the riser. The vegetation has stabilized the sediment that has accumulated in the upper end of the site but the sediment at the lower end is not vegetated. The existing stream bed drops about 0.5 ft from where it enters the site to the beginning edge of the willows and then another 2 feet down to the cattails. However, there is almost a 4 foot drop from the cattails to the 2 pipe invert at the riser. If we completely remove the riser, it may cause a head cut through the sediment at the lower end of the site because of the difference in elevation. The first figure in the attached file shows the site survey data. The second figure shows the proposed design. We recommend cutting the riser down 2.5 feet from the top, bringing it to the same elevation as the cattail area. Then a notch would be cut in the front of the riser at 0.5 ft deep and 2.5 ft wide to mimic the channel dimensions. This will reduce the ponded elevation and allow for sediment to fill in the basin near the riser, letting the channel form its own path with vegetation establishing over time. Please review and provide us your comments. Thank you. LeiLani Paugh ICI/OSM Group Supervisor 919 707 6146 lpaugh@ncdot.gov NCDOT Project Development & Environmental Analysis 1020 Birch Ridge Dr. Raleigh, NC 27610 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Cail, William G Sent: Friday, August 19, 2016 10:49 AM To: Griffin, Randy W; Paugh, Leilani Y; Lindsey, Jerry L Subject: Riser mod #2 Revised the riser view……per Jerry’s comment, showing appropriate 54” CMP view facing the riser. Galen Cail Maintenance-Operations Support Hydraulics Unit Department of Transportation Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties. 3