Boston Harbor Navigation Improvement Project-Phase 3 Rock Removal   3

The third phase of the improvement project, this contract, shall remove the remaining material in the Boston Harbor Federal Navigation Project (FNP) to achieve authorized project depth. The project features include: removal of material in the Main Ship Channel (MSC) to the Conley Terminal, including the turning basin or "MSC Notch", to -49 feet MLLW, removal of material in the Reserved Channel to -49 feet MLLW, and removal of material in the President Roads Anchorage to -49 feet MLLW. A CAD file with the -49 foot MLLW Contour Limits will be provided to the Contractor. The Contractor shall be required to remove all material within that limit to -49 feet MLLW. There is an allowable 2-foot overdepth within the -49 foot MLLW Contour Limit. One limited area within the Main Ship Channel shall be brought to a depth of -42 feet MLLW with an allowable 2-foot overdepth. The Government will pay for a 1ft.V:1ft.H side slope. The material to be removed under this contract is material consisting primarily of rock with limited amounts of ordinary and hard material (clays, silts, sands and gravel) remaining as overburden.