U-3431 start of study comments

Environmental
Quality
September 26, 2017
MEMORANDUM
To: Rachelle Beauregard
ROY COOPER
Co��erna�
MICHAEL S. REGAN
Secretcn-i�
S. JAY ZIMMERMAN
��;, E � r�„
From: Garcy Ward, Division of Water Resources, Washington Regional Office
Subject: Start of Study
NCDOT STIP U-3431
Widening of SR 1763 and NC 101 from SR 1756 to Outer Banks Drive to multi-lanes
in Havelock, Craven County, North Carolina
The Division of Water Resources has reviewed the informarion provided in the start of study letter for the above
menrioned project and offers the following comments:
1. Any impacts to waters or wetlands covered under a USACE Nationwide or Regional General permit would
require a corresponding Water Quality General Certification from the Division of Water Resources.
East Prong Slocum Creek falls within the project area and is class C; Sw; NSW waters of the State. The
NCDWR is very concerned with sediment and erosion impacts that could result from this project. The
NCDWR recommends that highly protecrive sediment and erosion control BMPs be implemented to reduce
the risk of nutrient runoff to these features. Additionally, to meet the requirements of NCDOT's NPDES
permit NCS0000250, the NCDWR requests that road design plans provide treatment of the storm water
runoff through best management practices as detailed in the most recent version of the North Carolina
Department of Transportation Stormwater Best Management Practices Toolbox manual.
3. East Prong Slocum Creek is subject to the Neuse Riparian Buffer Rules (15A NCAC 2B .0233). Impacts to
Riparian Buffers resulting from this project may require a Buffer Authorization subject to a"no practical
alternatives" determination.
4. In accordance with the Neuse Buffer Rules, bridges are listed as allowable [15A NCAC 2B .0233(6)].
Should Bridge 33 be replaced in association with this project, a Buffer Authorization will be required.
5. Bridge deck drains shal] not discharge directly into the stream or riparian buffer. Stormwater shall be
directed across the bridge and pre-treated through site-appropriate means (grassed swales, pre-formed scour
holes, vegetated buffers, etc.) before entering the stream. Roadway drainage to East Prong Slocum Creek
shall also be appropriately treated in accordance with the Neuse Buffer Rules [15A NCAC 2B .0233(5)(6)].
6. In accordance with the Environmental Management Commission's Rules (15A NCAC 2H.0506[h]),
mitigation will be required for impacts of greater than 1501inear feet to any perennial stream. In the event
that mitigation is required, the mitigation plan shall be designed to replace appropriate lost functions and
values. The North Carolina Division of Mitigation Services may be available far assistance with stream
mitigation.
Thank you for the opportunity to comment on this project. Please let us lcnow if we can be of further assistance.
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State of North Carolina I Environmental Quality
1617 Mail Service Center I Raleigh, North Carolina 27699-1617