RockGen Energy Center — Plant Summary
- EIA Plant ID
- 55391
- Capacity
- 561 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combustion Turbine
- Status
- Operating
- Location
- Dane, WI
- Operating Since
- 2001
- Generators
- 3
- Operator
- Dairyland Power Coop
- Parent Company
- —
- Annual Generation
- 496,408 MWh
- Capacity Factor
- 10.0%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
RockGen Energy Center
OperatingNatural Gas
Ranked #6 of 40 Natural Gas plants in WI#434 of 2009 nationally
561 MW Natural Gas operating in Dane, WI — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
561 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combustion Turbine
Technology
2001
Operating Since
Location
Coordinates
42.9767, -89.0492
County
Dane, WI
Nearby Plants
- Crawfish RiverSolar75 MW · 14.3 km
- Badger State Solar LLCSolar149 MW · 15.6 km
- Hackbarth Solar WI, LLCSolar5 MW · 17.1 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Dairyland Power Coop | — | — |
| Owner(s) | Dairyland Power Coop | — | International Heritage Inc. |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
RockGen Energy Center is a 503-megawatt (MW) natural gas fired peaking power plant located near Cambridge, Wisconsin. According to Calpine, it was the largest peaking plant in Wisconsin at the time it was constructed.
Read more on WikipediaRockGen Energy Center is a 561 MW natural gas-fired power plant located in Dane County, Wisconsin. The plant began operating in 2001 and is owned and operated by Dairyland Power Cooperative. It consists of three natural gas-fired combustion turbine generators. The plant is interconnected to the Midcontinent Independent Transmission System Operator (MISO) balancing authority, within the broader Midwest Reliability Organization (MRO) NERC region.
In the most recent year with available data, RockGen Energy Center generated 496,408 MWh of electricity, achieving a capacity factor of 10.0%. RockGen is the 6th largest power plant out of 19 in the state of Wisconsin, and ranks 439th out of 945 plants nationally.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
138 kV
Regulatory Status
RE
Entity Type
Cooperative
Sector
Electric Utility
Generation
9.3K MWh
Latest Month
496.4K MWh
Annual Generation
10.0%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
ROCKDALE · 138 kV
Substation Distance
0.123 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
ALTE.1ROCKGEN
Pricing Hub
MICHIGAN.HUB
Location Type
Generation Node
Node Source
Curated node match
News & Articles (10)Beta
General
Dairyland Transmission Line, Other Projects a ‘Victory’ for Midwest Consumers
Dairyland Power Cooperative's partly owned Cardinal-Hickory Creek transmission line, seen here crossing a river in Cassville, Wisconsin,...
America's Electric Cooperatives·1 years ago
Industry·corporate
Wisconsin Gas Plant Delayed as Enviros Still Try to Block Project
The timeline for building the Nemadji Trail Energy Center (NTEC) in Wisconsin has been pushed into next year.
Nemadji Trail Energy Center (operator)
RTO Insider·2 years ago
Industry·corporate
Massive solar farm plan angers southern Wisconsin residents
Farmer, who will have solar panels 100 feet from his lawn on two sides, has little patience for concerns about views and farmland...
Wisconsin Farmer·4 years ago
Industry·corporate
Ag Briefs: Brown Co. man dies after being pinned under tractor
Agricultural news across Wisconsin and beyond.
Wisconsin Farmer·4 years ago
Last updated 2026-03-26
View all 10 articles