Patent, Filed 2 Apr 81, patented 11 Oct 83,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
An underwater excavator comprising a modular non-metallic cofferdam wherein water under pressure exits from a plurality of nozzles along at least one side of the base of the cofferdam and a fluid driven eductor driven by pressurized fluid evacuates the suspended solids raised by the pressurized fluid that flows through the nozzles, with a plurality of small barrier nozzles located along one or more horizontal conduits used to sink the cofferdam.
- Construction Equipment, Materials and Supplies