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Home My WebLink AboutFW_ Borrow Pit _G_ Turbid DischargeFrom:Westphal, Anneliese To:Sprinkle, Hannah H Cc:Farrell, Sean C; Shaver, Brad E SAW; Lane, Stephen; Gingrich, Sophia E; Herndon, T. Mason; Yarborough, Jerry W Subject:FW: Borrow Pit "G" Turbid Discharge Date:Wednesday, October 5, 2022 5:03:41 PM Attachments:image422601.png image555701.png image551268.png image502279.png image035065.png image690491.png image612721.png R-3300B Permit PSH 23 - Location of Pit G Dischange.pdf image001.png Basin for PIt G.jpg Pipe discharge for Pit G basin.jpg Ditch discharging to stream.jpg Turbid water from ditch and clear water from stream.jpg Turbid water from ditch mixing with water from stream.jpg Hi Hannah, At the R-3300B field review today, we visited Site 19, at a location upgradient from the existing culvert at US 17. Although the jurisdictional stream in this location will be impacted by the project, it is still flowing and has been isolated from the project by EC measures. Yesterday afternoon turbidity in the stream was noted and therefore pumping to the stilling basin for Pit G was turned off. It seems that the layer that was reached in excavation of the pit caused turbidity that was not being treated by the basin. The water leaving the basin flows through a wooded wetland and then eventually to a ditch which takes it to the JS stream. The turbidity is mixing with the water in the stream at this location as we could see clear water up gradient from the ditch. Please see the attached marked-up permit drawing sheet 120 which shows the turbidity readings at several locations at Site 19. Also attached is the data sheet with the turbidity readings upstream (background) and the numbers from the borrow pit. As Ben Meyer notes in his email below, they have stopped all pumping to the basin (from the pit) and also stopped all discharge from the pit. They are considering other options to deal with the turbidity, also noted in Ben’s email. We walked to the outlet of the culvert under US 17, to the (in line) pond behind the Andrew’s Mortuary building, and also to the outlet of culverts that carry the stream under Annonale Trace and the stream/pond also looked turbid at these locations. Please let me or Sean know if you need any additional information or if you’d like to visit the site. We will keep you updated. Thanks, Anneliese Anneliese Westphal Environmental Senior Specialist Division 3 NCDOT- Division of Highways 910 341 2000 office 910 604 1330 mobile 910 675 0143 fax awestphal@ncdot.gov 5501 Barbados Blvd Castle Hayne, NC 28429-5647 From: Meyer, Benjamin C <ext-bcmeyer1@ncdot.gov> Sent: Wednesday, October 5, 2022 2:53 PM To: Westphal, Anneliese <awestphal@ncdot.gov> Cc: Farrell, Sean C <scfarrell@ncdot.gov>; Gingrich, Sophia E <segingrich@ncdot.gov>; Jackson Provost, PE, PLS <Jackson.Provost@summitde.com>; Waugh, Daniel G <dgwaugh1@ncdot.gov>; Jim L. Haga <jhaga@rkk.com>; Brandon Helms <brandon.helms@summitde.com> Subject: FW: Borrow Pit "G" Turbid Discharge Anneliese, Below and attached are the results of the turbidity meter readings from the Pit G discharge issue. We have stopped all discharge and pumping any remaining water out of the from Pit G sediment basin. Discussions of using sediment bags, teared stilling basins, and other options are being discussed. Let me know if there is any additional information you need from us. Cheers, Ben Ben Meyer, PE, CCM Assistant Resident Engineer Hampstead Bypass Cell: 910-617-1902 Ext-bcmeyer1@ncdot.gov bmeyer@rkk.com From: Brandon Helms <brandon.helms@summitde.com> Sent: Wednesday, October 5, 2022 1:21 PM To: Benjamin Meyer <bmeyer@rkk.com>; Jackson Provost, PE, PLS <jackson.provost@summitde.com>; Jim L. Haga <jhaga@rkk.com>; Jim L. Haga <jhaga@rkk.com> Subject: Borrow Pit "G" Turbid Discharge EXTERNAL EMAIL: Do not click links or open attachments unless you trust the 'Sender' and know the content is safe. See attached. Background/Upstream - 4.5 NTU Dewatering Basin Effluent BP"G" - 312 NTU Discharge into JS - 405 NTU JS @ Air Bridge - 375 NTU JS @ Culvert/US-17 Leaving Site - 334 NTU Get Outlook for Android Brandon Helms Transportation Technician V Tel: 919-732-3883 Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.