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The White River is a white, glacial river in the U.S. state of Washington. It flows about 75 miles (121 km) from its source, the Emmons Glacier on Mount Rainier, to join the Puyallup River at Sumner. It defines part of the boundary between King and Pierce counties. A second White River has its source in Glacier Peak Wilderness and flows southeast to Lake Wenatchee. ==Course== The source of the White River is the Emmons Glacier on the northeast side of Mount Rainier. The river flows from ice caves at the toe of the glacier. Its upper reach is contained within Mount Rainier National Park. Shortly after emerging from the Emmons Glacier, the White River flows generally east, by the White River Campground, then the White River Ranger Station, after which it turns north. The river is paralleled by much of its upper course by State Route 410, called the Mather Memorial Parkway in the national park. After several miles the river exits Mount Rainier National Park and enters Mount Baker-Snoqualmie National Forest. The river turns gradually westward, passing several national forest campgrounds. Huckleberry Creek joins just below The Dalles Campground. Several miles downriver from there the White River is joined by one of its main tributaries, the West Fork White River, which also originates at a glacier in Mount Rainier National Park, in this case, Winthrop Glacier. A few miles downriver from the West Fork confluence another major tributary joins, the Greenwater River. The small settlement of Greenwater is located at the confluence. Below Greenwater, the White River flows generally west. It passes Federation Forest State Park and is then joined by another tributary, the Clearwater River. Several miles downriver from there the White River is impounded by Mud Mountain Dam, which creates a marshy intermittent lake called Mud Mountain Lake. The dam was built for flood control purposes. Mud Mountain Lake only fills with water during conditions of exceptionally high stream flow. Below Mud Mountain Dam the White River enters the greater Tacoma metropolitan area. It flows between the cities of Buckley and Enumclaw, after which it makes a large bend northwest and then southwest, essentially flowing around Lake Tapps. North of the lake, the White River flows through the Muckleshoot Indian Reservation. Below that, to the west of Lake Tapps, the White River enters a broad floodplain and flows past the city of Pacific before emptying into the Puyallup River at Sumner. Lake Tapps is a reservoir created in 1911 for hydroelectric purposes. A diversion dam near Buckley taps the White River's water, sending a portion of it through a flume, a canal, and a pipeline to Lake Tapps. An outlet canal on the west side of the lake routes water through the turbines of the Dieringer Powerhouse, after which the water is returned to the lower White River (or Stuck River as it is locally called in this area) via the Dieringer "tailrace".〔General course info from 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「White River (Washington)」の詳細全文を読む スポンサード リンク
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