Hauser

Hauser is a 23.8 MW operating hydroelectric plant in Lewis and Clark County, Montana, operated by NorthWestern Energy (MT Hydro).

Plant statusOperating

Planning (completed)
Consented (completed)
Construction (completed)
OperatingNov 1911 (current stage)
ClosedJul 2025 (not yet reached)

Planned retirement: Jun 2028. This plant has generators at more than one stage; see the table below.

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Generators

Each generating unit EIA lists at this plant.

Unit	Technology	Capacity	Status	Online	Retired / planned retirement
HAU7	Conventional Hydroelectric	3.5 MW	Operating	May 2019
HAU8	Conventional Hydroelectric	3.5 MW	Operating	Nov 2022
HAU10	Conventional Hydroelectric	3.5 MW	Operating	Jul 2025
HAU11	Conventional Hydroelectric	3.5 MW	Operating	May 2021
HAU3	Conventional Hydroelectric	2.8 MW	Operating	Nov 1911	Planned Jun 2028
HAU9	Conventional Hydroelectric	3.5 MW	Planned, approvals not yet sought	Target Jun 2028
HAU12	Conventional Hydroelectric	3.5 MW	Planned, approvals not yet sought	Target Dec 2029
HAU2	Conventional Hydroelectric	3.9 MW	Retired	Nov 1911	Dec 2019
HAU6	Conventional Hydroelectric	3.0 MW	Retired	Sep 1915	Jul 2025
HAU1	Conventional Hydroelectric	2.8 MW	Retired	Nov 1911	Sep 2023
HAU4	Conventional Hydroelectric	2.8 MW	Retired	Nov 1911	Nov 2017
HAU5	Conventional Hydroelectric	2.8 MW	Retired	Nov 1911	Apr 2021

Plant details

Operator: NorthWestern Energy (MT Hydro)
Location: Lewis and Clark County, Montana
Balancing authority: NWMT
Sector: Electric Utility
Capacity: Operating: 16.8 MW
Planned: 7.0 MW
Retired: 15.3 MW
First unit online: Nov 1911
EIA plant ID: 2185

Location

46.7659, -111.8873

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Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem