Puget Sound Regional Council Puget Sound Regional Council The Puget Sound Regional Council (PSRC) is a metropolitan planning organization that develops policies and makes decisions about transportation planning, economic development, and growth management throughout the four-county Seattle metropolitan area surrounding Puget Sound. It is a forum for cities, towns, counties, transit agencies, port districts, Native American tribes, and state agencies to address regional issues. The Puget Sound Regional Council serves the central Puget Sound region of Washington state. The region is made up of King County, Kitsap County, Pierce County, and Snohomish County, which collectively encompass and comprise 73 cities and towns. The five
Puget Sound Central Basin. Puget Sound's sills, a kind of submarine terminal moraine, separate the basins from one another, and Puget Sound from the Strait of Juan de Fuca. Three sills are particularly significant—the one at Admiralty Inlet which checks the flow of water between the Strait of Juan de Fuca and Puget Sound, the one at the entrance to Hood Canal (about below the surface), and the one at the Tacoma Narrows (about ). Other sills that present less of a barrier include the ones at Blake Island, Agate Pass, Rich Passage, and Hammersley Inlet. The depth of the basins is