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De Witt County, Illinois: solar, wind, and storage projects and permits
Proposed projects, county offices, and the state rules for a solar, wind, or battery storage project in De Witt County, county seat Clinton.
Check land in De Witt CountyOpens the land report with the map on the county; click a spot for its flood, wetland, habitat, line-distance and parcel check.
What energy projects are proposed in De Witt County?
The MISO and PJM interconnection queues list 4 proposed projects in De Witt County (3 solar, 1 nuclear), about 463 MW in all. 1 has a signed interconnection agreement.
What stands out in De Witt County
By capacity, solar leads in De Witt County with 442 MW across 3 projects, followed by nuclear (1 project, 21 MW). The largest is queue number J1840, a 250 MW solar request in the MISO queue, agreement signed, filed Jun 2020, with a target in-service date of Aug 2023. Of the 4, 3 are still in study and 1 has a signed agreement. 3 are in the MISO queue (Ameren territory) and 1 in PJM (ComEd territory), so De Witt County straddles both grids. Ameren Illinois is the transmission owner named most often (3 of 4). The requests were filed between Jun 2020 and Oct 2025. Target in-service dates for those not yet under construction span Aug 2023 to Jan 2030; 2 of them have already passed, which means those schedules slipped.
A listing means a developer asked the grid operator to study connecting a project; many are never built, and the status column says where each one stands.
Reading the table: the queue number is the operator's ID for the request (MISO J-numbers, PJM AE/AF/AG-numbers); operators do not publish developer names in these files. Connection is the transmission owner and, where listed, the substation or line; "Other_" is the operator's own placeholder. In study (Phase 1/2) are MISO's definitive-planning study phases; "moved to TC1" means a PJM request was carried into Transition Cycle 1; "CIR Increase" is a request to add capacity rights to an existing project; "LRTP" names a MISO long-range transmission project. For PJM rows, MW is the figure in the megawatt column of PJM's public queue export; PJM also tracks maximum facility output and capacity rights separately, so a project's study documents can show a different number. 2 target in-service dates below have already passed while the request is still open: operators keep the developer's last reported date until the developer changes it, so a past date means the schedule slipped, not that the project was built.
Scroll the table sideways to see every column.
| Queue number and connection | Type | MW | Stage | Requested | Target in-service iThe in-service date the developer gave the grid operator. Developers set and change it, many projects slip, and some are never built. |
|---|---|---|---|---|---|
| J1840MISO · Ameren Illinois · Clinton to Goose Creek-4545 345kV line | Solar | 250 | Agreement signed | Jun 2020 | Aug 2023 date passed; status per the operator |
| J4010MISO · Ameren Illinois · Clinton 345kV Substation | Nuclear | 21 | In study (Phase 1) | Apr 2025 | Sep 2027 |
| J4158MISO · Ameren Illinois · 4TABOR - 4SCLINTON TP 138.0kV | Solar | 100 | In study | Oct 2025 | Jan 2030 |
| AH1-541PJM · ComEd · Chestnut 345 kV | Solar | 92 | In study | Sep 2021 | Mar 2025 date passed; status per the operator |
Sources: MISO generator interconnection queue and PJM interconnection queue, downloaded October 7, 2026; withdrawn and operating projects are left out, and the operators do not publish developer names. What the stages mean.
What can De Witt County require of a project?
Illinois law sets the ceiling: De Witt County must approve a commercial wind or solar project that meets the state standards, must finish its public hearing within 60 days, and may not ban them in agricultural or industrial zones (55 ILCS 5/5-12020); battery storage has had its own statewide standards since June 1, 2026 (55 ILCS 5/5-12024). Land inside a city or village falls under municipal zoning instead.
Recent local action: De Witt County's Code of Ordinances includes Chapter 157, Solar Energy Systems, created by Res. 2019-01 on March 21, 2019 and last amended by an ordinance passed November 28, 2023. (De Witt County Code, Ch. 157 Solar Energy Systems)
State siting standardsFarmland agreement (AIMA)Property taxes
Who to contact in De Witt County
Assessment questions go to the supervisor of assessments, special use applications to the zoning office, and road use agreements to the county engineer; the county seat is Clinton. A drainage district, if the land is in one, must receive the developer's drainage plan.
De Witt County websiteSupervisor of assessments
Solar for homes and businesses in De Witt County
Illinois net metering, the Illinois Shines incentive, and HOA rules are the same statewide; Ameren Illinois sets the application steps here: Illinois home and business solar rules · utility application links.
State and federal reviews
Illinois EPA stormwater coverage, IDNR's EcoCAT review, historic preservation review, and federal wildlife screening can apply to a site in De Witt County: Illinois agency list.
Get the land report for a spot
Flood zone, wetlands, nearest power line, soils, and more for any point. Parcel acreage fills in automatically in Texas and 26 other states (not Illinois, which has no statewide parcel layer).