U-2579AB permit site 8 pipe perch

Carpenter, Kristi
From: Euliss, Amy
Sent: Friday, February 9, 2024 3:24 PM
To: Brumagin, Stephen A (Steve) CIV USARMY CESAW (USA); Conchilla, Ryan
Cc: Sawicki (Gannett Fleming), Jeremy P; Trantham, Darren K; Shaver, Larry B; James
Meachum
Subject: U-2579AB permit site 8 pipe perch
Attachments: PSH 10B - Site 08 Plunge Pool addition.pdf, 20240209_081902jpg; [External] RE:
U-2579AB permit site 19; U-2579AB permit site 19
Steve and Ryan,
On U-2579AB-permit site 8, we have very similar situation to what was encountered at Site 19 (see attached email
chains for reference, one email from the USACE and another from DWR). The origin of the stream was taken by the pipe
impacts, which was also the scenario at site 19. So aquatic passage in the pipe system should not be a concern.
When installing the pipe system, several springs were found forcing us to use foundation conditioning material for
bedding this drainage system in order to stabilize it. The stone that was installed is now acting as an underdrain to the
system that is relieving itself at the outlet end of the system. We've found that trying to establish any native material at
or around the outlet of the pipe simply can't be maintained. In lieu of proposing lining the stream bed with stone
triggering a permit modification and mitigation, we're hoping the installation of a plunge pool at this location would
allow us to avoid the modification, and resolve the issue of the perched pipe, similar to last time. Attached is a revised
plan sheet for the site along with a current picture showing the perched outlet.
Please review and advise if you have any questions. They are actively working in the area. It would be helpful if you
could provide a response before the end of next week (2.16). Thanks in advance!
Amy Euliss
Division 9 PDEA Engineer
North Carolina Department of Transportation
336 747 7802 office
aeuliss ncdot.gov
375 Silas Creek Parkway
Winston Salem, NC 27127-7167
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.