Holter Dam, Gravity dam in Lewis and Clark County, United States
The Missouri River flows through the Holter Dam, which extends 1,364 feet in length and reaches a height of 124 feet.
Construction of the hydroelectric facility began in 1908 by the United Missouri River Power Company and Montana Power Company under Samuel Thomas Hauser's direction.
The dam and its surrounding structures represent one of Montana's most complete historical hydroelectric generating facilities, demonstrating early 20th-century industrial development.
The facility generates 50 megawatts of electricity and creates Holter Lake, which extends 25 miles and holds 243,000 acre-feet of water.
The construction site in 1916 became Montana Power's largest camp, containing 115 buildings including dormitories, a hospital, and dining facilities.
Location: Lewis and Clark County
GPS coordinates: 46.99170,-112.00600
Latest update: May 16, 2025 16:00
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