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Holter — Power plant · Hydro · NorthWestern Energy (MT Hydro)
  • Clean firm
  • Operating
  • 10 · 100 · 1,000 MW

Holter

Power plant · Hydro

Key facts

Power plant · Hydroran 52% of 2025 Operating
Capacity
Capacity: sourceEIA-860M · Open licenseMW
Commissioned
1918
Net generation, 2025
247,542 MWh
Grid
100 kV to NorthWestern Energy LLC - (MT) (NWMT)
Location
Cascade County, Montana
Operated by
NorthWestern Energy (MT Hydro)SourceEIA-860M Preliminary Monthly Electric Generator Inventory

Output

Net generation MWh by year, 2001 to 2025

Operations detail

Details

Who’s behind it

No companies named in filings yet.

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Technology
Hydro source: “Conventional Hydroelectric”
Age
108 years since 1918
All 7 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
AttributeValue
Gem
Unit ids
G100001030972
Location id
L100001025891
Grid
Nerc region
WECC
Report year
2025
Grid voltage kv
100
Transmission owner
NorthWestern Energy LLC - (MT)
Balancing authority code
NWMT
Balancing authority name
NorthWestern Energy (NWMT)
Eia status
By code
OA
Mw
9.60
Units
1
OP
Mw
45
Units
3
Standby mw
0
Status rule
some_units_idle
In service mw
54.60
Out of service mw
9.60
Fuel burned (MMBtu), 2025844,616
Capacity factor, 20250.517
Net generation (MWh), 2025247,542
Balancing authority codeNWMT

Timeline

  • In service · EIA-860M

Sources

4 sources

Sources EIA-860M · GEM · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory

Sources

Every source and license · Attribution

View at source