The state Department of Natural Resources has entered an agreement with Point Ruston development company to remove three creosote-laden docks from a Superfund site north of Tacoma.
The agreement signed Wednesday calls for the removal of about 2,300 pilings that are potentially leaching contaminants into marine waters and state-owned aquatic lands.
The three docks were built more than a century ago on private and public lands near the old Asarco copper smelter, which was shut down in 1985.
The dock removal continues cleanup at the Superfund site and paves the way for a planned waterfront development to include a luxury hotel, condominiums and restaurants.
The state and EPA are studying how best to remove the docks.