Bath Iron Works Sinking Basin Maintenance Dredging 2017

Bath Iron Works is a major United States shipyard located on the Kennebec River in Bath, Maine. Since its founding in 1884, the shipyard has built private, commercial and military vessels, most of which have been ordered by the United States Navy. The shipyard has built and sometimes designed battleships, frigates, cruisers and destroyers, including the Arleigh Burke class, which are currently among the world's most advanced surface warships. During World War II, ships built at Bath Iron Works were considered by sailors and Navy officials to be of superior toughness, giving rise to the phrase "Bath-built is best-built."

CASHMAN DREDGING was contracted to dredge and then dispose of 48,000 cubic yards of dredge spoils from the Bath Iron Works (BIW) dry-dock sinking basin.


  • The sinking basin was dredged to -70 feet plus one foot of allowable overdredge. Dredged material was placed at the in-river disposal site at Bluff Head, ~2.5 nautical miles downstream on the Kennebec River, utilizing the split hull dump scow Joe Verrochi.
  • The Kennebec River has swift currents and tide variations of up to 10 feet. Due to the depth of the project and river conditions, CASHMAN'S dredge Icarus, formerly known as F.J. Belesimo, operated on wires and anchors as ice buildup behind the dredge created a substantial amount of extra weight causing anchors to slide.
  • The river ice during this project created a number of additional problems including closing the scow after disposal on large chunks of ice; ice floating up and downstream made it impossible to survey on a number of days; destroying tide boards; and risk of damaging the survey boat hull.
  • The project was completed ahead of schedule despite the challenging weather conditions.

A $5,000 donation was made to the Maine Maritime Museum in appreciation of their letting CASHMAN DREDGING use their dock for crew change and parking.

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Bath Iron Works / General Dynamics
$2 Million
March 2017 - May 2017