Hauser — Lewis and Clark, MT — Operational, expanding Power Plant
Total Capacity
23.8 MW
Technology
Hydro
7 generators — 5 operational · 2 planned
First Unit Online
November 1, 1911
Expansion proposed for December 1, 2029
Hauser is a hydro power plant in Lewis and Clark County, MT with 7 generating units totaling 23.8 MW of nameplate capacity. It is operated by NorthWestern Energy (MT Hydro). Its first unit came online in 1911. 2 additional units are planned for completion by 2029.
About this plant
Hauser Dam is a hydroelectric straight gravity dam on the Missouri River about 14 miles (23 km) northeast of Helena, Montana, in the United States. The original dam, built between 1905 and 1907, failed in 1908 and caused severe flooding and damage downstream. A second dam was built on the site in 1908 and opened in 1911 and comprises the present structure. The current Hauser Dam is 700 feet (210 m) long and 80 feet (24 m) high. The reservoir formed by the dam, Hauser Lake, is 25 miles (40 km) long, has a surface area of 3,800 acres (1,500 ha), and has a storage capacity of 98,000 acre-feet (121,000,000 m3) of water when full.
Source: Wikipedia
Capacity rank
- #424 in the U.S. by capacity
- #14 in MT by capacity
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Monthly generation history
Source: EIA Form 923
Generators (7)
5 generators
5 operational generators totaling 16.8 MW · online 1911–2025
2 generators
2 planned generators totaling 7 MW · proposed for 2028–2029
Plant Information
| Plant ID | 2185 |
| Plant Name | Hauser |
| Operator | NorthWestern Energy (MT Hydro) |
| Sector | Electric Utility |
| Balancing Authority | NWMT |
| Power Market | |
| County | Lewis and Clark |
| State | Montana (all interconnection requests in Montana) |
| Status | Operational, expanding |
| Generation Type(s) | Hydro |
| Total Nameplate Capacity (MW) | 23.8 |
| Total Summer Capacity (MW) | 23.8 |
| Total Winter Capacity (MW) | 23.8 |
| Generating Units | 7 |
| Operational Units | 5 |
| Planned Units | 2 |
U.S. county map showing Lewis and Clark, MT
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