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Home My WebLink About20210453_perched pipe R-5768 US 311 (South Main Street)Carpenter, Kristi From: Conchilla, Ryan Sent: Monday, March 25, 2024 12:02 PM To: Braquet, Stephanie Cc: Jones, Scott A; Dale Swicegood; Euliss, Amy Subject: 20210453_perched pipe R-5768 US 311 (South Main Street) Attachments: PSH 4 - Site 02 Plunge Pool additional.pdf Stephanie, Sorry for the delay. Based on the photos and additional information provided, the addition of a plunge pool at the culvert outlet area is approved and should be constructed per the USACE conditions listed below. Let me know if I can provide further assistance. Ryan Conchilla, PWS Environmental Specialist II 401 and Buffer Transportation Permitting Branch North Carolina Department of Environmental Quality 919-707-9111 office Ryan.Conchilla@deg.nc.gov D- E � NORTH CAROLINA7AM Q kl/) Department of Environmental Duality Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Braquet, Stephanie <scbraquet@ncdot.gov> Sent: Monday, March 25, 2024 8:16 AM To: Conchilla, Ryan <ryan.conchilla@deq.nc.gov> Cc: Jones, Scott A <sajones8@ncdot.gov>; Dale Swicegood <DSwicegood@kcaeng.com>; Euliss, Amy <aeuliss@ncdot.gov> Subject: RE: [External] RE: perched pipe R-5768 US 311 (South Main Street) Good Morning Ryan, I was following up on the email below. We are waiting on a response from you before we proceed. I've also attached the markup plan sheet. Stephanie Braquet Division 9 Environmental Specialist North Carolina Department of Transportation 336 747 7800 office scbraguet(cancdot.gov 375 Silas Creek Parkway Winston Salem, NC 27127-7167 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Brumagin, Stephen A (Steve) CIV USARMY CESAW (USA) <Stephen.A.Brumagin@usace.army.mil> Sent: Friday, March 15, 2024 1:24 PM To: Braquet, Stephanie <scbrag uet@ncdot.gov>; Conchilla, Ryan <ryan.conchilla@deq.nc.gov> Cc: Jones, Scott A <salones8@ncdot.gov>; Dale Swicegood <DSwicegood@kcaeng.com>; Euliss, Amy <aeuliss@ncdot.gov> Subject: [External] RE: perched pipe R-5768 US 311 (South Main Street) CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message button located on your Outlook menu bar on the Home tab. Stephanie, Thanks for the photographs, they were helpful. The project plans don't capture the downstream rock "falls" and that is important for the discussion of connectivity. I would agree that this culvert provides a hydrologic connection for what is shown on the project plans as wetlands on the south side of the railroad and its function is to equalize surface water flow from the wetland area to the tributary below the culvert. As for what to do with the outlet of your culvert, I would say that installation of a dropbox/outlet would likely be considered additional impacts, require a permit/modification, and will place more of the stream into a structure. As an alternative, you indicated that NCDOT could create a rock dissipator/plunge pool below this culvert. NCDOT is authorized to place rock at the outlet of this structure (approx. 10 If) to protect the banks. If a rock energy dissipator/rock/native material -rock can be placed within this location, into the stream bed within the existing scour area to prevent further erosion/sedimentation (not just rock dumped into the scour up to Ordinary High -Water Mark), I believe that would not constitute a loss of waters and would be a minor alteration and would not require permit modification. Please let me know if you have any questions. Thanks. Stephen A. Brumagin NCDOT Project Manager U.S. Army Corps of Engineers, Charlotte Field Office, Wilmington District Work cell 704 798-6471 From: Braquet, Stephanie <scbrag uet@ncdot.gov> Sent: Thursday, March 14, 2024 3:17 PM To: Brumagin, Stephen A (Steve) CIV USARMY CESAW (USA) <Stephen.A.Brumagin@usace.army.mil>; Conchilla, Ryan <ryan.conchilla@deq.nc.gov> Cc: Jones, Scott A <salones8@ncdot.gov>; Dale Swicegood <DSwicegood@kcaeng.com>; Euliss, Amy <aeuliss@ncdot.gov> Subject: [Non-DoD Source] perched pipe R-5768 US 311 (South Main Street) Steve and Ryan, On R-5768-permit site 2 we have a perched pipe. (See attached pictures). It is a 42" pipe that should have been buried 20% but it was laid at grade, which was an oversight. However, even if the pipe had been buried at the 20% requirement, it would have perched. The pipe is currently 1' above the water, and the plunge pool is about 1' deep. The area has scoured 2' since installation and the 20% burial would have been around 9". If the pipe had been installed correctly, we would have at least 15" of scour. We can correct the perch using an energy dissipator or we can drop the pipe with a junction box and pipe extension. If anything is recommended, we would like to combine rip rap with native material, hoping to be able to proceed without a permit modification? I'm suggesting native material because we are hoping to keep the impact from being deemed a `loss of water'. We will do whateveryou recommend. Although, after reading through the Regional General Permit 50 Special Conditions, specifically (5) it states: Culverts/pipes placed across wetland fills purely for the purposes of equalizing surface water do not have to be buried but must be of adequate size and/or number to ensure unrestricted transmission of water. The pipe is solely for equalizing surface water because the flow is wetland4pipe4stream. Aquatic passage in the pipe system should not be a concern either. And, as you can see from the attached pictures, there are a lot of sheer rock drop-offs, most of which are beyond our construction limits. We would like to consider this pipe purely for the purpose of equalizing surface water and hope you would agree. For the Corps, the Action Id: SAW-2022-01426 For DWR, the project no is 20210453 If you have any questions, please feel free to reach out. Thanks Stephanie Braquet Division 9 Environmental Specialist North Carolina Department of Transportation 336 747 7800 office scbraguet(cancdot.gov 375 Silas Creek Parkway Winston Salem, NC 27127-7167 0 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.