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1135.8 MW Sub. Coal operating in Lamb, TX — Southwest Power Pool
1,135.8 MW
Nameplate Capacity
2
Generators
units
Conventional Steam Coal
Technology
1982
Operating Since
Coordinates
34.1865, -102.5700
County
Lamb, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Southwestern Public Service Co | Southwestern Public Service | — |
| Owner(s) | Southwestern Public Service Co | Xcel Energy | — |
| Status | Operating | — | — |
Tolk Power Plant is a coal-fired power plant in Texas, United States.
Read more on WikipediaTolk is a 1135.8 MW coal-fired power plant located in Lamb County, Texas. The plant began operating in 1982 and consists of two conventional steam coal generators. It is owned by Xcel Energy and operated by Southwestern Public Service Co. The plant's primary fuel source is subbituminous coal (SUB). Tolk operates within the Southwest Power Pool (SPP) balancing authority and the Midwest Reliability Organization (MRO) NERC region.
In the most recent year with available data, Tolk generated 2,911,290 MWh of electricity, resulting in a capacity factor of 29.3%. The plant ranks 5th out of 8 coal plants in Texas and 32nd out of 75 coal plants nationally. Financial data indicates an installed cost of $653.37 per kW, based on FERC filings.
Generated from EIA, GEM, and public data sources
ISO/RTO
SPP
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
329.7K MWh
Latest Month
2.9M MWh
Annual Generation
29.3%
Capacity Factor
CO₂ Intensity
2292 lb/MWh
NOx
2 lb/MWh
SO₂
Steam turbine · Southwestern Public Service Company · Data from 2015–2024
$782/kW
Installed Cost
$17/kW
Annual CapEx
$40.3/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
Tolk Substation · 345 kV
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
SPP
LMP Node
SPS.TOLK1
Pricing Hub
SPP South Hub
Location Type
Settlement Location
Node Source
EIA-860 direct report
Last updated 2026-03-26
View all 5 articlesSouthwest Power Pool (SWPP)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
6 lb/MWh
CH₄
0.262 lb/MWh
N₂O
0.038 lb/MWh
Capacity Factor
27.2%
Annual Net Gen
2708 GWh
CO₂eq
2309 lb/MWh
Subregion
SPP South