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72.6 MW Hydro operating in Carlton, MN — Midcontinent Independent Transmission System Operator, Inc..
72.6 MW
Nameplate Capacity
6
Generators
units
Conventional Hydroelectric
Technology
1907
Operating Since
Coordinates
46.6562, -92.3323
County
Carlton, MN
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | ALLETE, Inc. | ALLETE | — |
| Owner(s) | ALLETE, Inc. | ALLETE | — |
| Status | Operating | operating | — |
The Thomson hydroelectric plant is located in Carlton County, Minnesota. It is owned and operated by ALLETE, Inc. The plant has a total capacity of 72.6 MW consisting of 6 generators, and it began operating in 1907. Thomson is the second-largest hydroelectric plant in Minnesota (2 of 24) and ranks 244th nationally among 1464 hydroelectric facilities. The plant's primary fuel source is water (WAT), utilizing conventional hydroelectric technology.
In the most recent year of record, Thomson generated 290,470 MWh of electricity, achieving a capacity factor of 45.6%. The plant operates within the Midcontinent Independent Transmission System Operator, Inc. (MISO) balancing authority and the MRO NERC region. Financial data indicates an installed cost of $1561.09 per kW. The power purchase agreement (PPA) price is $40 per MWh.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
10.6K MWh
Latest Month
290.5K MWh
Annual Generation
45.6%
Capacity Factor
ALLETE, Inc. · Data from 2015–2025
$40.0/MWh
PPA Price
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
Wrenshall Substation · 115 kV
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
MP.THOMSON
Pricing Hub
MINN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-04-09
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ask pi about ThomsonMidcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility