20170723 Ver 1_CHEC_DOTmitigationExecuted_20170607

Booth�Associates, LLC
engineering for the future since 1960
5/4/ 17
Via Electronic Mail
LeiLani Paugh
ICl/OSM Group Supervisor
Natural Environment Section
North Carolina Department of Transportation
Subject: Verification of Mitigation Plan Coverage for Construction Activities
To Install Underground Electric Utility as part of NCDOT
TIP Project B-2500 (Phase I), Dare County, North Carolina
Dear Ms. Paugh:
In response to the North Carolina Department of Highways (NCDOT) Project TIP B-
2500, Cape Hatteras Electric Cooperative (CHEC) is required to relocate its existing
underground transmission power line to facilitate its realignment with the new bridge. Booth
& Associates, LLC has prepared the Pre-Construction Notification for submittal to the
Wilmington District US Army Corps of Engineers Office. We will need to include this
confirmation letter with the submittal package as evidence that the CHEC wetland impacts
will be covered by the existing and approved NCDOT mitigation plan for the subject project.
Per emailed confirmation on September 8, 2016 from Mr. David Hering, LG, PE
(NCDOT), any required wetland mitigation resulting from transmission circuit relocation may
be covered by the wetland restoration site. CHEC construction for the subject project will
require an additiona10.15 acres of permanent impacts to Section 404 jurisdictional freshwater
wetlands as shown in the attached drawing.
Terrestrial upland communities in the project corridor are represented by three major
community types: Man- Dominated (maintained/disturbed), Maritime Shrub Thicket, and
Maritime Shrub Grassland. The delineated wetland community types located within the
corridor include: Man-Dominated, Maritime Grassland, Maritime Shrub Thicket, and
Maritime Shrub/Grassland. Neither streams nor open water are affected by construction
within the corridor. The proposed route avoids as much environmental impact as practical.
Impacts to park land were minimized in design by relocating the duct bank into the
NCDOT right of way, boring under Oregon Inlet Road, and boring under wetlands in front of
the substation adjacent to NC 12. Any clearing will be done by hand and no mechanized
clearing or grubbing is required. Timber matting will be utilized in sensitive areas to reduce
impacts to existing vegetation and reduce impaction from construction vehicles. Existing silt
fence along the NCDOT right of way will be utilized to avoid sediment and runoff impacts to
surrounding aquatic vegetation.

Ms. LeiLani Paugh
May 4, 2017
Page 2
Improvements to existing substation structures and connection of the new cable circuit
requires expansion of the substation fence. A temporary chain link safety fence which does
not require digging posts was chosen to further reduce impacts to existing vegetation. The
location of this fence was modified to completely avoid a small section of CAMA wetlands.
During coordination with NCDOT, it was determined to keep the transmission circuit
installed all the way to the end of the new bridge deck to avoid future relocations as storm
impacts and continued erosion impede stability of the original splice location. This design
reduces the amount of temporary easement required on Pea Island National Wildlife Refuge
and removes the necessity for a concrete duct bank installation and associated wetland
impacts. Furthermore, existing pole structures will be removed by hand with bases to be left
in place to avoid impacts to existing vegetation and wildlife habitat.
Please sign below to acknowledge and agree, subject to approval by the regulatory
agencies, the mitigation of wetland impacts from CHEC construction to be performed by
NCDOT at the Bodie Island Lighthouse Pond SNHA (Site Id #1134) as described in the Final
Wetland Mitigation Plan NC 12 Replacement of Herbert C. Bonner Bridge (Bridge No. 11)
over Oregon Inlet.
LeiLani Paugh
ICl/OSM Group Supervisor
Natural Environment Section
NCDOT
Digitally signed by LeiLani Paugh
l�ei La n i Pa ug h Dnvir'oiPaugh@nc'dotgovNc �OT,ou=Natural
oace: zov.os.oa n:taao-oa�oo�
George Price
Manager of Engineering & Operations
Cape Hatteras Electric Cooperative
Digitally signed by George Pnce
C�eorge Price DNm=GeorgePrlce,o=CapeHatterasEleRric
Cooperafive, ou, emall=[e-mail], r—US
oare:zon.osns is:icse-oa�ov
Please feel free to contact our office with any questions.
S incerely,
BOOTH & ASSOCIATES, LLC
Digitally signed by William P. Jordan
William P. Jordan DN:rn=WilliamP.Jordan,o=BoothandAssociates,
LLC, ou, email=jordanwp@booth-assocmm, r—US
Date:2017.05.05 10:10:18 -04'00'
William P. Jordan, PE
WPJ/mew
Enclosures
cc: Ms. Susan Flythe (CHEC)
Mr. George Price (CHEC)
Mr. David Hering (NCDOT)
Mr. Steve Thompson (NPS)
17-8450-9005