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The North Fork Toutle River is a tributary of the Toutle River in southwestern Washington in the United States. The river has its headwaters near Spirit Lake, on the north side of Mount St. Helens, and flows 39 miles (63 km) to the Toutle River, [3] about 17 miles (27 km) upstream of its confluence with the Cowlitz River. [4]
The Toutle River begins at the confluence of the North Fork Toutle River and the South Fork Toutle River near the community of Toutle. The forks originate on Mount St. Helens in Mount St. Helens National Volcanic Monument, and flow generally west to form the main stem, which continues generally west, with significant north–south deviations.
The Sediment Retention Structure is an earthen dam, 1,888 feet (575 m) long and 184 feet (56 m) high, on the North Fork Toutle River in the U.S. state of Washington. [1] Completed by the United States Army Corps of Engineers in 1989, it is meant to prevent sediment from the 1980 eruption of Mount St. Helens from increasing flood risks along the ...
Castle Creek is a tributary of the North Fork Toutle River on the flank of Mount St. Helens in Washington state. It rises about two miles (three kilometers) northwest of the crater rim ( 46°13′01″N 122°14′22″W / 46.21690°N 122.23934°W / 46.21690; -122.23934 ( Castle Creek source ) ) [ 1 ] and flows generally to the ...
State Route 504 (SR 504, designated as the Spirit Lake Memorial Highway) is a state highway in southwestern Washington state in the United States. It travels 52 miles (84 km) along the North Fork Toutle River to the Mount St. Helens area, serving as the main access to the Mount St. Helens National Volcanic Monument.
The Green River is the largest tributary of the North Fork Toutle River in the U.S. state of Washington.Situated near Mount St. Helens in the Cascade Range in the southern part of the state, it flows generally west through Mount St. Helens National Volcanic Monument and industrial timberlands for 37.4 miles (60.2 km).
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The eruption of Mount St. Helens on May 18, 1980, created a lahar or debris avalanche that rushed down the North Fork of the Toutle River, burying the whole valley up to 600 feet (180 m) deep. The lahar backed up Coldwater Creek for more than a mile (1.6 km), damming the creek and its tributary South Fork Coldwater Creek to a height of 180 feet ...