20230055 Ver 1_AddInfo Requested_20230308

Homer, Seren M
From: Homer, Seren M
Sent: Wednesday, March 8, 2023 7:06 PM
To: Morgan Gilbert
Cc: Hopper, Christopher D CIV USARMY CESAW (USA); Munzer, Olivia;[e-mail]
Subject: Request for Additional Information: Land For Peloquin - Alamance County - DWR#20230055
Hi Morgan,
I have reviewed the above -noted project and require additional information to complete the review. Please provide a
response to the below items within 30 days. Please note that the application will be considered "on hold" until a
complete response is received.
1. In your PCN Application Part C.(4i.), you state, "The proposed project is a single -phased residential development
that is located southwest of the intersection of South Jim Minor Road and Turner Road in Haw River, North
Carolina within Alamance County." If the proposed project is a residential development, please provide an
overall site plan showing the entire development.
The proposed culvert is a 48" HDPE. The stream width is reported as 15-17 feet. DWR's standard condition is
"Culverts shall be designed and installed in such a manner that the original stream profiles are not altered and
allow for aquatic life movement during low flows. The dimension, pattern, and profile of the stream above and
below a pipe or culvert shall not be modified by widening the stream channel or by reducing the depth of the
stream in connection with the construction activity. The width, height, and gradient of a proposed culvert shall
be such as to pass the average historical low flow and spring flow without adversely altering flow velocity." It
appears the culvert size may not meet this condition. Please provide more information and/or modify the
culvert design accordingly.
3. We have found that burying steep -sloped pipes creates instability upstream and can impede aquatic passage.
We recommend installing the culvert at existing grade in these instances to allow for aquatic life movement
during low flow conditions. If this option is not feasible, please provide an explanation for why it is infeasible and
provide an alternative to ensure upstream stability and aquatic passage.
4. WRC has expressed concerns about aquatic passage based on the proposed culvert type (HDPE). They
recommend using other pipe materials, such as CMP or RCP, to retain substrate in the structure and ensure
aquatic passage during low flows. Please provide a response to WRC's concerns.
Please be aware that we have evaluated the proposed buffer impacts and believe the activity is exempt. Therefore, no
buffer authorization will be issued.
Thanks,
Seren Homer (she/her/hers)
Environmental Specialist, Division of Water Resources
North Carolina Department of Environmental Quality
Office: [phone] 1 Cell: [phone]
seren.homer(@ncdenr.pov

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