Proprietary data
Powered land in Ohio: 417 power nodes, 8 sites and 11 demand rows, each with its source and check date.
58Provisional DCMI Power Readiness Score, out of 100 (DC Market Insights calculation, 85 of 100 weight points with data; final at 90). Missing: grid congestion and queue backlog, water stress.
First calculated on 4 November 2026.
Verified on 2 November 2026 · Method
Substations are not drawn: we count them by county only.
Portsmouth Site AI data center campus (SB Energy), Piketon in Pike County is the largest of the 8 Ohio sites we track, at 10,000 MW; together they state 10,350 MW across 8 counties (DC Market Insights calculation). Cardinal at 650 MW leads the 751 MW of plant capacity leaving service. Cologix names the most stated demand here (21 MW of 21 MW).
| Data on file | Rows | MW |
|---|---|---|
| Power plants (EIA-860M) | 269 | 47,683 MW |
| Substations 230 kV or more (HIFLD, counted by county) | 70 | |
| ISO queue (PJM) | Not loaded yet | |
| Large-load requests (utility filings) | 5 | 5,500 MW |
| Data center sites | 8 | 10,350 MW |
| Demand rows | 11 | 21 MW |
| Policy rows | 1 |
Leaving service in Ohio: 751 MW at 13 plants, led by Cardinal in Jefferson County (650 MW, partly retiring from December 2028), Collinwood in Cuyahoga County (16 MW, idle (out of service)) and Clevelandcliffs Warren in Trumbull County (13 MW, idle (out of service)).
Coming: 3,342 MW at 24 planned plants, led by Harvey Solar (350 MW, planned, in service August 2028), Yellow Wood Solar Energy LLC (300 MW, planned, in service December 2027) and Firelands Wind (297 MW, planned, in service May 2027).
Of 70 substations, 62 at 345 kV and 8 at 500 kV or more; Lorain County (5), Franklin County (4) and Butler County (3) hold the most.
Large-load requests in Ohio filings: 5,500 MW across 5.
| Power node | Kind | County | MW | Date | Source |
|---|---|---|---|---|---|
| Customer request near Fayette Substation, Jeffersonville | Large-load request | Fayette County | 1,500 MW | requested January 2031 | PJM TEAC, Dayton Supplemental Projects, 7 Jul 2026 |
| Data center customer request near Eldean Substation, Piqua | Large-load request | Miami County | 1,400 MW | requested May 2033 | PJM TEAC, Dayton Supplemental Projects, 3 Feb 2026 |
| Customer request near Stuart Substation, Adams County | Large-load request | Adams County | 1,300 MW | requested March 2032 | PJM TEAC, Dayton Supplemental Projects, 7 Jul 2026 |
| Customer request near Trenton, Butler County | Large-load request | Butler County | 800 MW | requested | PJM TEAC, DEOK Supplemental Projects, 8 Sep 2026 |
| Cardinal | Plant leaving service | Jefferson County | 650 MW | partly retiring from December 2028 | EIA Form 860M, September 2026 |
| Customer request near Clinton Substation, Wilmington | Large-load request | Clinton County | 500 MW | requested January 2030 | PJM TEAC, Dayton Supplemental Projects, 7 Jul 2026 |
| Harvey Solar | Planned plant | Licking County | 350 MW | planned, in service August 2028 | EIA Form 860M, September 2026 |
| Yellow Wood Solar Energy LLC | Planned plant | Clinton County | 300 MW | planned, in service December 2027 | EIA Form 860M, September 2026 |
| Firelands Wind | Planned plant | Huron County | 297 MW | planned, in service May 2027 | EIA Form 860M, September 2026 |
| Eastern Cottontail Solar | Planned plant | Fairfield County | 220 MW | planned, in service December 2028 | EIA Form 860M, September 2026 |
5 of the 8 Ohio sites state no MW and no power date yet, so they have no page of their own.
| Site | County | Acres | MW (source words) | Time to power (source words) | Status | Source |
|---|---|---|---|---|---|---|
| Portsmouth Site AI data center campus (SB Energy), Piketon | Pike County | 189 | 10,000 MW | idea | Federal, 24 March 2026 | |
| Liames LLC data center campus (Apollo Power Generation Facility), Middleton Township | Wood County | 350 MW | powered | State, 3 February 2026 | ||
| Project Mila (Prologis), Trenton | Butler County | 145 | zoned | County, 2 November 2026 | ||
| Aligned Coshocton campus, Conesville Industrial Park | Coshocton County | 197 | Initial capacity delivery targeted for mid 2026 (as stated in July 2025) | idea | Developer, 24 July 2025 | |
| Former W.H. Sammis Power Plant site (ETEM) | Jefferson County | 170 | idea | Developer, 2 November 2026 | ||
| J5 LLC (Meta) data center site, Piqua | Miami County | 607.7 | powered | County, 18 August 2026 | ||
| Amazon Web Services Wilmington campus, US-68 | Clinton County | zoned | County, 6 January 2026 | |||
| Project Dazzler (Google), Franklin Furnace | Scioto County | idea | Developer, 2 November 2026 |
6 buyers, 11 rows; evidence: 7 from company and 4 from press.
Our Power and Policy tracker holds 1 rule for Ohio.
Ohio: 58 out of 100, provisional, from 85 weight points.
| Factor | Points | Basis |
|---|---|---|
| Time to power | 30 of 30 | earliest stated power date 2026 (1 stated date) |
| Available or freeing MW | 3 of 20 | 751 MW freeing (full points at 5,000 MW, DC Market Insights calculation) |
| Grid congestion and queue backlog | Not loaded yet | the PJM queue file: not loaded yet |
| Policy | 6 of 15 | in force: 1 tariff |
| Land and permitting | 8 of 10 | best site by status and acres; opposition events not tracked yet |
| Fiber and latency to the nearest hub | 2.5 of 10 | 25 live data centers tracked in the state (full points at 100) |
| Water stress | Not loaded yet | water stress index not loaded yet |
Pike County (Portsmouth Site AI data center campus (SB Energy), Piketon), Butler County and Coshocton County and 5 more counties.
Jefferson County, with 650 MW of the 751 MW state total.
6 buyers; by stated MW, Cologix leads. Each row is on the Ohio demand page.
We list 8 Ohio sites and do not sell land; each site names its source.
"AEP Ohio (Ohio Power) Data Center Tariff settlement adopted by the PUCO" (9 July 2025) is the newest.
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