20150473 Ver 1_Email_20150506

Ridings, Rob
From:Ridings, Rob
Sent:Tuesday, May 12, 2015 12:23 PM
To:Montague, Heather W
Subject:RE: Non-reporting NWP 3 and NWP 13 with corresponding WQC No. 3883 and WQC No.
3885 on SR 1226 (Poplar Mountain Road) in Warren County
Heather,
Sorry I thought I replied to this one but didn’t. Anyways, Yes, I agree what you propose can be covered under the
General Cert’s 3883/3885. All good from my end.
Thanks,
Rob

From: Montague, Heather W
Sent: Wednesday, May 06, 2015 3:13 PM
To: Ridings, Rob; Alsmeyer, Eric C SAW
Cc: Carpenter, Frank N; Schuster, Paul A; Moss, Danny W; Phipps, Dawn
Subject: Non-reporting NWP 3 and NWP 13 with corresponding WQC No. 3883 and WQC No. 3885 on SR 1226 (Poplar
Mountain Road) in Warren County

Rob and Eric-

Warren County Maintenance has a cross line in need of replacement on SR 1226 (Poplar Mountain Road), west of
Norlina.

River Basin: Roanoke
Stream Name: UT to Smith Creek
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Lat, Long: 36.45341N, -78.24710W
HUC: 03010106
NCDENR-DWQ Index Number, Stream Classification: 23-10, C

Existing structure: 1@36” and 1@18”24 pipes that 44ft long with stone headwalls to either end. This structure has failed
causing the inlet shoulder and slope to collapse.

Proposed structure: 48” aluminum pipe that is 44ft long. The new pipe will include a junction box with grate and frame
on the inlet end and a headwall on the outlet end. The junction box will collect water from the pond spill pipe as well as
runoff water from the proposed newly piped ditch sections. Note the existing concrete ditch will become piped sections
of ditch. The area surrounding the junction box will then be backfilled and vegetated.

Dewatering: The spill pipe from the pond will be plugged temporarily during construction. Sandbags will be installed at
the head of the ditch line on the SE quadrant. Also sandbags will be placed in the inlet of the pipe under the farm path
for containment. A clean water pump with be used intermittently to pump around any pond water that builds up. This
water will be returned to the creek downstream of the work area and allowed to flow over plastic as a dissipator. A mud
pump and a silt bag will be used to treat any disturbed water within the work limits. Note: Impervious dike materials
used for dewatering will be in place for as long as necessary, but will be removed once site is stabilized.

Permanent impacts: no new surface water fill is proposed with replacing the existing pipes with a new one pipe of the
same length. Minimal amount of rip rap underlined with geotextile may be necessary along the bank/slope at the outlet
end of the new pipe.

Temporary impacts: none, dewatering length matches existing pipe length.
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Protected species information: This crossing is too small to support protected mussels. A biological conclusion of No
Effect was rendered for the Dwarf wedge mussel and the Tar River spinymussel based on lack of suitable habitat.

Buffer Impacts:
No protected riparian buffers will be impacts since this protected is within the Roanoke River Basin.

For maintenance sites such as this one, NCDOT Division 5 has a procedure in place to provide our construction crews
with print outs of the general conditions along with a letter head cover sheet explaining the intent to operate under a
non-reporting permit as long as all applicable conditions are met. Oversight from both the Environmental Staff and REU
Field Operations Unit will ensure compliance with the permit conditions are met and that standard BMPs are followed.
This work is scheduled to begin sometime within the next couple of months.

Heather W. Montague
NCDOT DIV 5 Environmental Specialist
[e-mail]
[phone] office
[phone] cell

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