Plans are currently underway for dredging to begin at the Herbert C. Bonner Bridge on N.C. 12 over the Oregon Inlet in Dare County.
The N.C. Department of Transportation and Great Lakes Dredge and Dock Co. LLC have come to an agreement for the Dredge Alaska to begin dredging sand from the main navigation channel of the Oregon Inlet and deposit it on the area underneath the Bonner Bridge where scour caused the department to close the bridge earlier this week.
Crews this morning began preparing for the dredging operation, which is currently expected to begin Friday afternoon at the earliest and last two days, weather and current permitting.
Once dredging operations are complete, NCDOT crews will then perform additional scans and inspections of the piles to determine the next steps necessary in reopening the bridge.
North Carolina Governor Pat McCrory declared a State of Emergency due to the closing of the Bonner Bridge.
“This declaration will give us the flexibility we need to get the repairs done as quickly as possible,” said Governor Pat McCrory. “However, safety will be the sole factor in determining when the Bonner Bridge reopens to traffic.”
NCDOT earlier this week awarded a $1.6 million contract to Carolina Bridge Company Inc. of Orangeburg, S.C. for emergency repairs on the bridge. NCDOT and the contractor are working together to develop a timeframe for the repairs to be complete.
As part of this emergency repair project, crews will use sandbags and four-foot tall A-Jacks to provide support to the bridge pilings. A-Jacks locked together will be placed in a perimeter around the support structure of the bridge. Crews will then fill the perimeter with sandbags to provide support to the pilings. An additional two layers of A-Jacks and sandbags will then be placed on top of the base layer for a total of 10-12 feet of protection. This will allow sand to collect over the sandbags and A-Jacks, providing additional support to the structure.
Press Release, December 6, 2013