FieldProspects

Marshall County, Illinois

Marshall County, Illinois has 11 power projects in the FieldProspects database: 7 operating plants totaling 146.4 MW and 4 planned projects totaling 491 MW. No data center record lists the county. Wind leads with 549 MW across 4 projects. 3 planned projects are past their listed in-service date.

Data as of Grid region: Midcontinent ISO (MISO)Refreshed monthly
11
power projects, planned and operating
491MW
planned generation, 4 projects
146.4MW
operating generation, 7 projects
3
planned projects past their listed in-service date
Map

Marshall County and its neighbors

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

Marshall no data centers LaSalle no data centers Putnam no data centers Bureau no data centers Woodford no data centers Stark no data centers Peoria 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
3.4times

more planned than operating generation in Marshall County. 4 projects in the queue would add 491 MW to the 146.4 MW operating today, and 3 of them are past their listed in-service date.

Operating generation146.4 MW
Planned generation491 MW

Technology mix

11 projects, 637.4 MW planned and operating

Wind549 MW4 projects, 86%
Solar88.4 MW7 projects, 14%
Which companies own these 11 projects?Project names, developers and contacts are for members.See what members get

Power generation in the county

7 plants operate inside Marshall County, 146.4 MW of wind and solar. The queue adds 491 MW across 4 projects, and 3 of them are past their listed in-service date.

Figure 1

Operating and planned generation by technology

MW in Marshall County

OperatingPlanned
WindOperating 93 MW 1 project
WindPlanned 456 MW 3 projects
SolarOperating 53.4 MW 6 projects
SolarPlanned 35 MW 1 project
View as table
TechnologyStatusProjectsMW
WindOperating193
WindPlanned3456
SolarOperating653.4
SolarPlanned135
Operating: 146.4 MW. Planned: 491 MW. If every planned project is built, county generation would reach 637.4 MW.
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
050100150200 Snapshot year 100 2021 2022 35 2023 178 2024 2025 2026 2027 2028 178 2029
View as table
YearPlanned projectsMW
20211100
202200
2023135
20241178
202500
202600
202700
202800
20291178
3 projects, 313 MW, were due before 2026

Marshall County against its neighbors

None of the 6 neighboring counties with a page lists a data center record. LaSalle County has the most operating generation among them, 2.8 GW.

CountyData center recordsData center MWOperating generation MWPlanned generation MWData center MW per MW operating
LaSalle County 0
0
2,824
4,642 0x
Bureau County 0
0
752
164 0x
Woodford County 0
0
200
1,878 0x
Stark County 0
0
154
500 0x
Marshall County this page 0
0
146
491 0x
Peoria County 0
0
47
2,111 0x
Putnam County 0
0
4
547 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.

7 counties shown

What changed since June 4, 2026

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

Open the change feed
0
added to a queue, 0 MW
0
came online, started construction or signed an interconnection agreement, 0 MW
0
cancelled, dropped or went inactive, 0 MW
1
slipped its in-service date, 178 MW

Every change in Marshall County

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

Members only
County: Marshall 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 Marshall County

Project name, developer, status, MW, in-service year and the developer’s contacts, for all 11 records. Filter, sort and export to Excel.

Members only
County: Marshall County, ILStatus: all except cancelledSort: MW, largest first 11 records
Project or campusDeveloperStatusMWYearContacts
11 records and 637.4 MW behind this preview

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