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139.6 MW Natural Gas Fired Combustion Turbine (40 MW) + Natural Gas Internal Combustion Engine (100 MW) planned in Pennington, SD — Western Area Power Administration - Rocky Mountain Region
139.6 MW
Nameplate Capacity
7
Generators
units
Hybrid (2)
Technology
Natural Gas Fired Combustion Turbine + Natural Gas Internal Combustion Engine
Planned: 2002
Planned Operation
Coordinates
44.1218, -103.2641
County
Pennington, SD
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Black Hills Power, Inc. | Black Hills Power | — |
| Owner(s) | Black Hills Power, Inc. | Black Hills | — |
| Status | Planned | — | — |
Lange Generating Station is a 139.6 MW natural gas-fired power plant located in Pennington County, South Dakota. The plant began operating in 2002 and is owned and operated by Black Hills Power, Inc., a subsidiary of Black Hills. The facility consists of seven generators utilizing both natural gas-fired combustion turbine and natural gas internal combustion engine technologies, classifying it as a hybrid plant. Lange Generating Station operates within the Western Area Power Administration - Rocky Mountain Region balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year of data, the plant generated 115,379 MWh of electricity, achieving a capacity factor of 9.4%. The installed cost of the plant was $768.28 per kW, according to FERC data. Lange Generating Station is ranked as the 6th largest power plant in South Dakota and 845th nationally.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
Bilateral Market
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Western Area Power Administration - Rocky Mountain Region (WACM)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
17.1K MWh
Latest Month
115.4K MWh
Annual Generation
9.4%
Capacity Factor
CO₂ Intensity
1353 lb/MWh
NOx
0.635 lb/MWh
SO₂
0.006 lb/MWh
CH₄
0.026 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
10.9%
Annual Net Gen
38 GWh
CO₂eq
1354 lb/MWh
Subregion
WECC Rockies
Gas turbine · Black Hills Power, Inc. · Data from 2018–2024
$811/kW
Installed Cost
$13/kW
Annual CapEx
$55.3/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
This plant is in a bilateral market territory without organized wholesale pricing. Nodal pricing data is not available.
Last updated 2026-03-26
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