Hauser Dam is a six-unit hydroelectric plant on the Missouri River, about 14 miles northeast of Helena, Mont. The units have a total generating capacity of 19 megawatts. Hauser Dam, which began operation in 1911, is 720 feet long and 111 feet high. Its reservoir is 14 miles long and has a storage capacity of 64,253 acre-feet when combined with nearby Lake Helena’s usable storage capacity. The dam is classified as a “run-of-river” project because it can generate electricity using the water that flows down the river, without the need to store additional water supplies. Click here for more photos.