Holter Dam
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Holter Dam is a hydroelectric straight gravity dam on the Missouri River about 45 miles northeast of Helena, Montana, in the United States. The dam, which was built between 1908 and 1918, is 1,364 fee
Holter Dam in 1918
Holter Lake circa the early 2000s, with the Holter Lake Campground in the foreground.
The Madison limestone walls of the Gates of the Mountains.
Interior of the Holter Dam powerhouse in 1994. Generating turbine No. 1 is in the foreground.
Black Eagle Dam
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Black Eagle Dam is a hydroelectric gravity weir dam located on the Missouri River in the city of Great Falls, Montana. The first dam on the site, built and opened in 1890, was a timber-and-rock crib d
Black Eagle Dam in 2013
Looking northeast across Black Eagle Dam circa 1907. The south powerhouse is at the bottom of the image, and dam is at the left.
The interior of the north bank powerhouse at Black Eagle Dam, showing the ropes and pulleys used to transfer mechanical power to the smelter.
Black Eagle Dam is dynamited on April 14, 1908, to allow floodwaters from collapsed Hauser Dam to pass.