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NJDOT Franklin Street at Lake Narraticon

When the New Jersey Department of Transportation wanted to replace the existing timber bridge and overflow spillway in the center of the earthen Lake Narraticon Dam, a temporary, braced, steel sheet pile cofferdam and a permanent, sheet pile cut-off wall were required to excavate to subgrade and to control the water from the adjacent lake. Peirce Engineering designed the 58’W x 115’L cofferdam for the general contractor, temporarily utilizing the permanent cut-off wall as the back side of the cofferdam and eliminating 115 linear feet of sheet pile wall.

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