The Mud Mountain Dam, located east of Tacoma just outside Pierce County, is one of five dams managed by the U.S. Army Corps of Engineers to battle historic flooding in western Washington that was easing in local areas Friday.
The flooding this week, fueled by atmospheric-river rains, prompted evacuation orders and warnings, school delays and road closures in Pierce County.
Army Corps of Engineers water managers have been regulating water flows around the clock at two dams the agency owns and operates: the Mud Mountain Dam on the White River in Enumclaw and the Howard A. Hanson Dam further northwest along the Green River…