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Weeks Falls

Hydroelectric power plants in Washington (state)King County, Washington geography stubsWaterfalls of King County, WashingtonWaterfalls of Washington (state)
Weeks Falls
Weeks Falls

Weeks Falls is a waterfall on the south fork of the Snoqualmie River, located near North Bend, Washington, USA, just south of Interstate 90 at exit 38. The falls are at the end of the road that goes past the Olallie State Park ranger headquarters. From the gravel parking lot, there is a paved accessible overlook to see the falls and a small area around the hydro-electric plant. There is also a ¼ mile accessible interpretive trail nearby.Weeks Falls has a small hydroelectric plant operated by CHI West which generates about 4.3 Megawatts peak. It is unusual because it operates without a dam. Instead, water is being drawn from the river above the falls and run down an underground channel to the generation unit at the bottom of Weeks Falls.

Excerpt from the Wikipedia article Weeks Falls (License: CC BY-SA 3.0, Authors, Images).

Weeks Falls
Southeast Homestead Valley Road,

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N 47.43301 ° E -121.64663 °
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Southeast Homestead Valley Road

Southeast Homestead Valley Road

Washington, United States
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Weeks Falls
Weeks Falls
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Chester Morse Lake
Chester Morse Lake

Chester Morse Lake (originally Cedar Lake) is a lake in the upper region of the Cedar River watershed in the U.S. state of Washington. The original lake surface was 1,530 feet (466 m) above sea level, but when the river was dammed in 1900, the elevation was raised to 1,560 feet (475 m). Chester Morse Lake is more than four miles (6 km) long, and is primarily fed from the east by the north and south forks of the Cedar River, and from the south by the Rex River. The lake is part of the Seattle area water supply. Located in the upper watershed, Chester Morse Lake is impounded by the masonry dam and a secondary control structure called the Overflow Dike. The lake now functions as a water supply storage reservoir and powers a 30-megawatt hydroelectric facility. Chester Morse Lake was previously a natural lake called Cedar Lake. Cedar Lake was formed about 14,000 years ago by the terminal moraine of an alpine glacier descending the Cedar River valley from the upper elevations of the Cascade Mountains. Because upstream fish passage to Chester Morse Lake is naturally blocked by Cedar Falls, the fish populations in the lake are isolated from those downstream. Bull trout and pygmy whitefish populations in Chester Morse Lake have thus been separated from other populations for at least 13,000 years, and represent unique genetic stocks of these species. Both of these species spend most of their time in deeper portions of the lake. The surface of Chester Morse Lake has an average annual fluctuation of about 20 feet in elevation. Inundation of the Cedar and Rex river deltas strongly affects their aquatic and wetland habitats. Changes in lake level management toward higher lake levels in the past 15 years have resulted in a retreat upslope of sedge and willow communities on the delta. Inundation of the Cedar and Rex river channels within and upstream of the delta causes sedimentation that can negatively affect bull trout eggs. Studies are underway to examine these effects.