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History
Holter Dam
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Holter Dam is a hydroelectric straight gravity dam on the Missouri River about 45 miles (72 km) northeast of Helena, Montana, in the United States. The dam, which was built between 1908 and 1918, is 1,364 feet (416 m) long and 124 feet (38 m) high. The reservoir formed by the dam, Holter Lake is 25 miles (40 km) long and has a storage capacity of 243,000 acre-feet (300,000,000 m3) of water when full. The dam is a "run-of-the-river" dam because it can generate electricity without needing to store additional water supplies behind the dam.
Holter Dam in 1918
Holter Dam in 1918
Holter Lake circa the early 2000s, with the Holter Lake Campground in the foreground.
Holter Lake circa the early 2000s, with the Holter Lake Campground in the foreground.
The Madison limestone walls of the Gates of the Mountains.
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.
Interior of the Holter Dam powerhouse in 1994. Generating turbine No. 1 is in the foreground.
Helena, Montana
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Helena is the capital city of the U.S. state of Montana and the seat of Lewis and Clark County.
Image: Helena Montana 2006
Image: Helena Montana 2006
Image: Helena Cathedral 1
Image: Helena Cathedral 1
Image: Montana State Capitol by T. Elizabeth
Image: Montana State Capitol by T. Elizabeth
Image: Montana Original Governors Mansion
Image: Montana Original Governors Mansion