The Puget Sound is a critically important water body to the Seattle and Washington State’s economy (plus it is where the DSI home office is located). It has numerous industry and urban areas along its length raising interest among researchers, industry and the environmental regulatory community. 

Puget Sound is a sound along the northwestern coast of the U.S. state of Washington, an inlet of the Pacific Ocean, and part of the Salish Sea. It is a complex estuarine system of interconnected marine waterways and basins, with one major and two minor connections to the open Pacific Ocean via the Strait of Juan de Fuca-Admiralty Inlet being the major connection and Deception Pass and Swinomish Channel being the minor. Flow through Deception Pass is approximately equal to 2% of the total tidal exchange between Puget Sound and the Strait of Juan de Fuca. Puget Sound extends approximately 160 km (100 miles) from Deception Pass in the north to Olympia, Washington in the south. Its average depth is 450 feet (140 m) and its maximum depth, off Point Jefferson between Indianola and Kingston, is 280 m (930 feet). The depth of the main basin, between the southern tip of Whidbey Island and Tacoma, Washington, is approximately 180 m (600 feet) (Wikipedia). 

This grid contains 7,796 cells, with an average orthogonal deviation of 1.04 degrees (updated September 2016 to include Deception Pass). The grid stretches from Olympia of Thurston County, WA to Strait of Juan de Fuca. This grid was built in multiple stages and joined to together to make one complete grid in EFDC+ Explorer and Grid+.