FieldProspects

Clay County, Illinois

Clay County, Illinois has 24 power projects in the FieldProspects database: 16 operating plants totaling 726 MW and 8 planned projects totaling 1.2 GW. No data center record lists the county. Solar leads with 1.2 GW across 8 projects. 3 planned projects are past their listed in-service date.

Data as of Grid region: Midcontinent ISO (MISO)Refreshed monthly
24
power projects, planned and operating
1.2GW
planned generation, 8 projects
726MW
operating generation, 16 projects
3
planned projects past their listed in-service date
Map

Clay County and its neighbors

Counties shaded by data center MW on record, planned to operating. 4 of its 6 neighboring counties have pages of their own. The rest are in the member database.

Richland Fayette no data centers Effingham 0 MW Marion no data centers Wayne Jasper no data centers Clay no data centers
no data center MWunder 100 MW100 to 1,000 MW1,000 to 5,000 MW5,000 to 15,000 MW15,000 MW or more no page yet

Data center records planned, under construction and operating, data as of October 8, 2026.Hover a county for its numbers

Headline finding
1.7times

more planned than operating generation in Clay County. 8 projects in the queue would add 1.2 GW to the 726 MW operating today, and 3 of them are past their listed in-service date.

Operating generation726 MW
Planned generation1.2 GW

Technology mix

24 projects, 2 GW planned and operating

Solar1.2 GW8 projects, 60%
Natural Gas456 MW4 projects, 23%
Battery Storage300 MW2 projects, 15%
One other technology18 MW10 projects, 1%
Which companies own these 24 projects?Project names, developers and contacts are for members.See what members get

Power generation in the county

16 plants operate inside Clay County, 726 MW. The queue adds 1.2 GW across 8 projects, and 3 of them are past their listed in-service date.

Figure 1

Operating and planned generation by technology

MW in Clay County

OperatingPlanned
SolarOperating 252 MW 2 projects
SolarPlanned 927 MW 6 projects
Natural GasOperating 456 MW 4 projects
Battery StoragePlanned 300 MW 2 projects
OilOperating 18 MW 10 projects
View as table
TechnologyStatusProjectsMW
SolarOperating2252
SolarPlanned6927
Natural GasOperating4456
Battery StoragePlanned2300
OilOperating1018
Operating: 726 MW. Planned: 1.2 GW. If every planned project is built, county generation would reach 2 GW.
Source. FieldProspects database: ISO/RTO interconnection queues, EIA-860M and public data center filings, data as of October 8, 2026.
Figure 2

Planned generation by listed in-service year

MW. Years before 2026 are past due.

Past dueDue 2026 or later
0100200300400 Snapshot year 275 2021 2022 2023 300 2024 2025 327 2026 125 2027 200 2028
View as table
YearPlanned projectsMW
20211275
202200
202300
20242300
202500
20263327
20271125
20281200
3 projects, 575 MW, were due before 2026

Clay County against its neighbors

None of the 4 neighboring counties with a page lists a data center record. Jasper County has the most operating generation among them, 671.2 MW.

CountyData center recordsData center MWOperating generation MWPlanned generation MWData center MW per MW operating
Clay County this page 0
0
726
1,227 0x
Jasper County 0
0
671
874 0x
Marion County 0
0
372
648 0x
Fayette County 0
0
101
1,198 0x
Effingham County 1
0
7
0 0x

Data center MW counts records planned, under construction and operating. Generation is inside the county only. Neighbors without a page have fewer than three projects on record.

5 counties shown

What changed since June 4, 2026

1 project in Clay County moved between the two snapshots. Counts and MW are below; the projects themselves are for members.

Open the change feed
1
added to a queue, 2 MW
0
came online, started construction or signed an interconnection agreement, 0 MW
0
cancelled, dropped or went inactive, 0 MW
0
slipped their in-service date, 0 MW

Every change in Clay County

Project, what changed, technology, MW and the dates that moved, for all 1 change.

Members only
County: Clay County, ILSince June 4, 2026 1 change
ProjectChangeTechnologyMWPrevious dateNew date
1 change behind this preview

Rows are hidden on public pages. Members see the project behind each change, its developer and the dates that moved.

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Every record in Clay County

Project name, developer, status, MW, in-service year and the developer’s contacts, for all 24 records. Filter, sort and export to Excel.

Members only
County: Clay County, ILStatus: all except cancelledSort: MW, largest first 24 records
Project or campusDeveloperStatusMWYearContacts
24 records and 2 GW behind this preview

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