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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F EASLEY LYNDO TIPPETT
GOVERNOR SECRETARY
November 21, 2008
MEMORANDUM TO FILE
FROM Robert Bamer 40V..1W-
Engineering Associate
Project Development and Environmental Analysis Branch
SUBJECT Stormwater Issues Regarding Proposed NC 210 (Murchison Road)
Improvements, TIP Project U-4444
A meeting was held on November 21, 2008 for the proposed project The purpose
of the meeting was to discuss stormwater issues on the project The following persons,
were in attendance
Jay McInnis
Robert Barrier
Marshall Clawson
Chris Militscher
Rob Ridings
Max Price
Glen Prillaman (via phone)
Lee Ward (via phone)
NCDOT Project Development and Environmental
Analysis Branch
NCDOT Project Development and Environmental
Analysis Branch
NCDOT Hydraulics Unit
Environmental Protection Agency
NC Division of Water Quality
Weatherill Engineering
Fort Bragg Master Planning
Fort Bragg Stormwater
Max Price explained that he had begun looking at ways to treat stormwater near
Little Cross Creek Chris Milrtscher explained that if tributaries are present, it must be
insured that there are no impairments to the 303d stream
Mr Price mentioned that Cross Creek is several miles away from project
Mr Ridings informed the group that unnamed tributaries carry the same
designation as the main stream Mr Militscher added that regulations regarding impaired
streams also apply to their tributaries He further discussed that he understands it is hard
to provide treatment for this project due to land and environmental constraints
MAILING ADDRESS TELEPHONE 919-733-3141 LOCATION
NC DEPARTMENT OF TRANSPORTATION FAX 919-733-9794 TRANSPORTATION BUILDING
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS 1 SOUTH WILMINGTON STREET
1548 MAIL SERVICE CENTER WEBSITE WWW DOH DOT STATE NC US RALEIGH NC
RALEIGH NC 27699-1548
Page 2 of 2
U-4444 Mmutes
It was noted that the wetland west of Murchison is not of very high quality Mr
Militscher suggested building a stormwater retention basin in the wetland
Mr Price explained that he had considered a basin, and had calculated a basin size
to treat the first inch of runoff from the pavement only, while initially diverting other
runoff through the grassed swales and wetlands He mentioned that offsrte runoff flows
through the two ideal locations for a basin, and that channeling the offsrte runoff around
them would cause additional environmental impacts If the offsrte runoff is not diverted,
then the basin would be very large, also causing additional environmental impacts
Mr Price explained he had an alternative to building a basin He suggested
instead of tying the median inlets on the high (west) side to a pipe system, the median
inlets will carry the water to outlets on the west side of the road into a grassed ditch or
natural swales This will provide some treatment of the stormwater before it reaches
Little Cross Creek
Mr Ridings and Mr Militscher agreed with Mr Price's suggestion, winch would
create more outlets on the west side than otherwise
Mr Ridings asked if preformed scour holes would be used at the roadside outfalls
Mr Price explained that due to the topography, preformed scour holes would not work
any better than energy pads Mr Ridings then asked about check dams Mr Price
explained check dams might pose a hazard since the shoulder width has been reduced to,
six feet 1 .1
It was emphasized that a commitment be added to the FONSI regarding treatment
Mr Militscher asked about the drainage design at the proposed Randolph Street
interchange
Mr Price suggested putting three cross pipes under Ramp A at Randolph Street to
prevent draining the wetland on cemetery property, then providing an energy dissipater
pad in the wetland outside of the loop Mr Militscher responded that he does not like
energy dissipaters in wetlands He asked if the dissipater could go inside of the loop Mr
Price explained that the outfall velocity is governed by pipe size, thus interior treatment
would not reduce outfall velocities
Mr Price mentioned that the existing concrete paved ditches will be replaced with
grassed ditches throughout the project These ditches will probably be reinforced with
fabric
It was mentioned that EPA and DWQ do not recommend burying pipes at
Randolph Street because these crossings are at the headwaters of the stream and that it
would drain the wetland at the cemetery Also, it was said that NCDOT cannot further
impair an already impaired stream, and that NCDOT must display an effort towards
impact mitigation