20240673 Ver 1_BR-0086 Sturgeon Conservation Measures_20240510

STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
Roy COOPER
GOVERNOR
DATE: Apri14, 2024
TO: NCDOT - All Employees
FROM: Garry Wright
NCDOT Division 4
SUBJECT: NMFS Section 7 Conservation Measures
J.R. "JOEY" HOPKfNs
SECRETARY
• In water work moratorium from February 15th — September 30th
• All in -water work activities will take place during daylight hours only.
• Temporary rock causeway will be no more than 80' wide at the base and cannot
take up more than 50% of the river's width at any given time. Causeway
installation will not begin until October 1st
• The temporary work structure will impact no more than 500 ft2 (0.011 acres) of
substrate. The temporary work structures will be immediately adjacent to or in the
foot print of the existing or new bridge.
• Causeway will be constructed of Class II granite rip -rap (9"-23") as a base,
capped with Class B granite rip -rap (5"-12"). All rip -rap must be free of clean of
dirt, debris and sediment prior to installation.
• If used, the temporary work bridge using 25' long spans, 30' wide with 12 H-piles
per bent. The total length of the work bridge is estimated to be a max of 7 spans
with two finger piers for bent removal. The total estimated number of H-piles is
108.
• Siltation control fence or other stationary measures will be placed parallel to the
shoreline and may not be placed waterward of the MHWL or OHWM; measures
will not impede or obstruct species movement.
• Turbidity curtains will only be deployed when necessary and will be anchored
using non looping materials as required by the Atlantic Sturgeon PDCs to reduce
the risk of entanglement.
• Turbidity curtains will be shore -parallel (anchored on the shore at both ends) and
may not exceed 550 feet in length; curtains must be securely anchored and will
not impede or obstruct species movement.
Mailing Address:
NC DEPARTMENT OF TRANSPORTATION
BUSINESS UNIT NAME
ADDRESS
CITY. NC ZIP
Telephone:
Fax: 4##40-90W
Customer Service: 1-877-368-4968
Website: ncdot.gov
Location:
ADDRESS
CITY. NC ZIP

Turbidity curtains in combination with temporary causeways and cofferdams will
not block more than 50% of the width of the river to ensure species movement is
not obstructed.
• Operation of any mechanical construction equipment will cease immediately if a
listed species is seen within a 50-ft radius of the equipment. Project activities will
not resume until the protected species has departed the project area of their own
volition.
• Motorized vessels operated by the bridge contractor in and around the work zone
will generally operate at "idle speed/no wake" at all times while operating water
depths where the draft of the vessel provides less than a 4-ft clearance from the
bottom, and after a protected species has been observed in and has departed the
area.