Pierce County Terminal Expansion - Tacoma, Wash.
The first phase consisted of the construction of a habitat area by building an underwater rock berm from elevation -50 ft MMLW to elevation -20 ft MMLW. The area behind the berm was backfilled with 84,000 cu yd of dredge spoils. The second phase required the dredging of 392,000 cu yd of material and placement of riprap slope protection. There were 43,000 cu yd of unsuitable material that was excavated and disposed of at a designated landfill.