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Located at the corner of Front and Red Cross streets, the building will enable CFCC to better serve local citizens by providing more classrooms for general college classes, expanded health care training labs, a simulated operating room for the surgical technology program and a student services center which will include a one- stop location for vital student services like financial aid, counseling, career services, and business services.
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The Riverwalk is an elevated timber walkway that follows the borders of the Cape Fear River for over one mile in downtown Wilmington, NC. In recent years, ACE has been the prime designer and structural engineer of record for numerous segments of the Riverwalk's construction.
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The Fine Arts Center is a three story, 100,000 square foot, structural steel frame building. It features 60,000 square feet of state-of-the-art, high bay theater space with 1,500 seat capacity and multiple balcony levels. The center includes 40,000 square feet of classrooms, studios, rehearsal space, and recording studios. Cost for this project is $35M.
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Located behind the Schwartz Center on the CFCC campus this 6-story, precast concrete parking deck will hold 1,200 cars. Our design services also included design of numerous site retaining walls and pedestrian paths that connect to historical railroad buildings. Cost for this project is $20M.
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Andrew Consulting Engineers was hired in 2014 by the state of North Carolina to design a cofferdam and SECU Memorial Walkway to surround the USS North Carolina, a WWII Battleship commissioned in 1941 and moored since 1961 in the Cape Fear River across from downtown Wilmington.
COFFERDAM INFO
A cofferdam is a structure built within a body of water to allow the enclosed area to be de-watered to create a dry work environment.
Cofferdams are typically temporary construction structures, but the Battleship cofferdam will be permanent to allow for future repairs and maintenance.
The Battleship cofferdam will enable workers to repair and restore the ship’s corroded hull, which is paper-thin in places.
The Battleship’s last major dry docking and repair work was done in November 1953.
The cofferdam will be constructed from a series of 50’ tall structural steel sheet pilings that form the wall and are held in place by a series of 55’ to 60’ tall steel “H” pilings, half of which are placed vertically against the sheet to hold it in place and the other half placed at an angle to the sheet or “battered.”
Both the sheet pilings and the H pilings will be driven 30’ to 40’ below the mudline, with just 10’ showing above the water line.
Four weir gates will be installed in the cofferdam. The water tight gates can be opened and closed to pump water out and allow water in.
The dam will be painted to match the color of the hull.
The cofferdam will cost $8 million to construct and will be paid by the state of North Carolina.
The cofferdam will be constructed over 18 months by Orion Marine Group of Norfolk, VA.
Project team:
Andrew Consulting Engineers – design and structural engineering services
BMH Architects – design services
McFadyen Engineers – electrical engineering for SECU Memorial Walkway lighting
S&ME -- geotechnical engineering and environmental testing services for permitting process and installation of the cofferdam and SECU Memorial Walkway pilings.
The only other permanent cofferdam of its kind in place in the United States is the one surrounding the USS Alabama, a 680’ long battleship moored since 1964 in Mobile Bay.
By the Numbers:
50’ tall, with 10’ visible above the waterlinE
1,809 feet long around the perimeter, or just over 1/3 of a mile
1,206 steel sheet piles, each measuring 25” wide and 15” deep in a corrugated “z” shape
229 vertical steel H-piles, each 55 feet long
229 battered steel H-piles, each 60 feet long
4 weir gates measuring 10’6” tall x 6’ wide to allow water in and out
4.6 million pounds (or 2,300 tons) of steel
$11 million to construct
18 months to build
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