Rock River
BrownfieldBeloit, Rock, Wisconsin · Wisconsin Power & Light Co
Rock River is a natural gas plant in Beloit, Rock, Wisconsin, retired 2020-06-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 319 MW of generation, so the grid hookup, transmission rights, and often cooling-water access are already in place — collapsing the speed-to-power timeline versus a greenfield build.
Former use & capacity
Grid hookup & remediation
Site conditions & market — Rock County
County-level intelligence for this site's location — the power economics, water, hazard, connectivity, and workforce a developer screens before ever visiting. Assembled from FEMA NRI, BLS QCEW, FCC BDC, USGS water-use, and EIA.
Market & workforce
Power economics & interconnection
Water & cooling
Hazard, flood & connectivity
County-level context — address-level utility offerings and flood zoning vary within the county. Confirm site-specific service with the utility and a Phase I ESA.
Nearby brownfield & retired-generation sites
A proximity screen of other retired-plant, contaminated, and EPA-flagged sites near Rock River — the environmental neighborhood, ranked by legacy grid capacity.
| Site | Former use | Legacy MW | Distance | Cleanup status |
|---|---|---|---|---|
| Sabrooke | oil plant | 150 | 25.3 mi | — |
| Blackhawk | natural gas plant | 50 | 5.3 mi | — |
| Sheepskin | natural gas plant | 42 | 17.9 mi | — |
| Rockford Community Solar | former landfill site | 3 | 22.4 mi | cleanup_complete |
| Beloit Coal Ash Landfill | former landfill site | 2 | 4.2 mi | cleanup_complete |
Derived from GridCensus's retired-generator & EPA brownfield dataset. Not a substitute for an ASTM E1527 Phase I environmental radius report.
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Nearby datacenter candidate sites
Scored candidate sites near Rock River, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| CHERRY VALLEY | Substation-Adjacent | IL | Boone County | 345 kV | 600 MW | 3.8 yrs | 65.5 |
| TAP137909 | Substation-Adjacent | IL | Winnebago County | 345 kV | 600 MW | 3.8 yrs | 65.4 |
| UNKNOWN124165 | Substation-Adjacent | IL | Winnebago County | 345 kV | 600 MW | 3.8 yrs | 65.2 |
| TAP136942 | Substation-Adjacent | IL | Winnebago County | 345 kV | 600 MW | 3.8 yrs | 65.0 |
| TAP137873 | Substation-Adjacent | IL | Boone County | 345 kV | 600 MW | 3.8 yrs | 64.8 |
| UNKNOWN122295 | Substation-Adjacent | IL | Boone County | 345 kV | 600 MW | 3.8 yrs | 64.7 |
| Rockford Community Solar | Brownfield | IL | Winnebago | — | 3 MW | 3.8 yrs | 64.7 |
| WEMPLETOWN | Substation-Adjacent | IL | Winnebago County | 345 kV | 600 MW | 3.8 yrs | 64.6 |
Nearby internet exchanges
- Network 222Madison, WI · 13 networks
- 5Nines DataMadison, WI · 6 networks
- University of Wisconsin-MadisonMadison, WI · 5 networks
- EdgeConneX Madison (EDCMAD01)Madison, WI · 4 networks
See all datacenter sites in Wisconsin →
Dataset updated . Screening estimates derived from public data sources.
Brownfield attributes are derived from EIA retired-generator and EPA public data. Existing capacity reflects the retired plant's historical nameplate, not deliverable interconnection for a new load. Confirm reusable interconnection rights, remediation status, and site availability with the utility, ISO, and current owner.
Go deeper than the public screen
Every site and score for Rock River, Beloit, Rock, Wisconsin is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.