Debris Removal and Coffer Dam Installation at Downing’s Landing Boat Access Area

Engineering design and construction of a steel sheet coffer dam to enclose a work area for the construction of a boat ramp by the New Hampshire Fish and Game Department, the removal of debris along the path of the cofferdam to ensure that it can be installed satisfactorily and appropriately to allow for construction of the boat ramp; and the removal of thirty-seven (37) remnant wood piles from a former dock structure. The proposed coffer dam will be approximately 240 linear feet. A turbidity curtain around the work area will be installed and maintained by the New Hampshire Fish and Game Department prior to the start of construction. The project will include coordination with the New Hampshire Fish and Game Department construction crew on the site involved with boat ramp construction. After the construction of the boat access ramp is complete, the New Hampshire Fish and Game Department shall flood the work site, and the Contractor shall remove the coffer dam and restore the site.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 31 -	Earthwork, Site Clearing, Grading, Excavation and Fill, Subgrade Preparation, Excavation, Shoring, Tunneling and Mining, Tunnel Excavation.
Division 35 -	Waterway and Marine Construction, Dam Construction and Equipment.