USGS Washington Water Science Center
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The Puyallup River Basin lies mostly within Pierce County, Washington, and contains 972 square miles of land ranging in elevation from zero at its mouth in Puget Sound to 14,408 feet at the top of Mount Rainier. The cities of Tacoma, Puyallup, Sumner, and Orting are some of the population centers located in the basin.
To protect lives and property in the basin, Pierce County needs accurate information about flooding, such as flood peak timing and peak river levels. The USGS developed a computerized flood alert system for Pierce County that provides this information in real time, based on data from satellite-linked USGS gaging stations. Called SSARRMENU, the system provides a graphic display of conditions in the basin as well as meteorological data and results from flood simulation programs.