Data centers and new power in Union County, AR
870 MW of new power is waiting to connect to the grid in Union County, AR — 2 active requests. Typical wait: 1.6 years. 3 projects are built, 11 withdrawn. Data as of 14 October 2026.
Is one near your house?
We have not mapped a large AI data center inside Union County itself — but we track the biggest ones nationally, and requests to connect new power here are on the public record.
What is happening with electricity in Union County
Every new power plant, battery or big customer has to join a waiting list before it can plug into the grid. This is what that list looks like in Union County right now.
Where every request ever filed here ended up
Most requests in the US are withdrawn — a developer tests a site and moves on. That is normal, not a warning sign for Union County.
What kind of power is asking to connect
By capacity requested. Data as of 14 October 2026.
All the numbers
16 requests ever filed
Source: interconnection queues published by MISO. Parsed and normalised by Watt Street. Data as of 14 October 2026. A queued project is a request, not a commitment.
Outcome of every request filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 3 | 600 MW | 18.8% |
| Still waiting | 2 | 870 MW | 12.5% |
| Withdrawn | 11 | 1.5 GW | 68.8% |
| Paused | 0 | — | 0.0% |
Waiting to connect, by type of power
| Type | Projects | Capacity requested |
|---|---|---|
| Natural gas | 1 | 770 MW |
| Solar | 1 | 100 MW |
Key dates for projects here
1 dated · next closes 2027-09-10 (MISO)
| Queue | What closes | Closes | Standing |
|---|---|---|---|
| MISO | MISO DPP-2026 Definitive Planning Phase application deadline Attachment X of the tariff and BPM-015. | 2027-09-10 | confirmed source |
| FERC | FERC large-load show cause — stakeholder comments on RTO responses Comments on the six RTO/ISO responses to the FPA section 206 show-cause orders of 18 June 2026 (PJM EL26-67, SPP EL26-68, NYISO EL26-69, MISO EL26-70… | No date published yet | unconfirmed source |
| FERC | FERC RM26-4 — generic large-load rulemaking Still at ANOPR stage. | No date published yet | confirmed source |
| FERC | Georgia PSC - Georgia Power must file large-load contracts 30 days before execution A standing obligation rather than a dated one: large-load contracts must be filed with the commission at least 30 days before they are executed. | No date published yet | confirmed source |
A date marked confirmed was checked by a person against the authority's own tariff, order or form page. Anything else is listed so you know it exists, with a link so you can check it yourself. Full calendar.
The biggest projects on file
top 15 by size
| Project | Type | Capacity | Status | Filed | Queue |
|---|---|---|---|---|---|
| White Bluff EHV | Natural gas | 770 MW | active | 2024-12 | MISO |
| EL DORADO EHV - SAREPTA 345/115 SS 345.0kV | Solar | 350 MW | withdrawn | 2025-02 | MISO |
| El Dorado 500kV Substation | Solar | 250 MW | completed | 2021-08 | MISO |
| El Dorado 500kV Substation | Solar | 250 MW | completed | 2021-08 | MISO |
| EL DORADO EHV - SAREPTA 345/115 SS 345.0kV | Solar | 200 MW | withdrawn | 2024-04 | MISO |
| El Dorado Upland SS 115kV | Solar | 150 MW | withdrawn | 2022-09 | MISO |
| Eldorado Upland SS 115kV | Solar | 150 MW | withdrawn | 2022-09 | MISO |
| EL DORADO EHV - SAREPTA 345/115 SS 345.0kV | Solar | 150 MW | withdrawn | 2025-02 | MISO |
| El Dorado East 115kV | Solar | 130 MW | withdrawn | 2022-09 | MISO |
| Texas Eastern F SS - Strong SS 115 kV Line Tap | Solar | 100 MW | withdrawn | 2019-04 | MISO |
| El Dorado East - Sterlington 115 kV | Solar | 100 MW | completed | 2020-06 | MISO |
| HUTTIG SS - STRONG SS 115.0kV | Solar | 100 MW | active | 2025-06 | MISO |
| El Dorado 500kV Substation | Solar | 75 MW | withdrawn | 2021-08 | MISO |
| El Dorado 500kV Substation | Solar | 75 MW | withdrawn | 2021-08 | MISO |
| El Dorado East - Sterlington 115 kV | Solar | 50 MW | withdrawn | 2020-06 | MISO |
How Union County compares
#437 in the US · #10 in AR
Union County ranks #437 of 1,607 US counties by power waiting to connect, and #10 of 34 in Arkansas.
| County | Waiting | Capacity queued |
|---|---|---|
| Crittenden County | 7 | 1.8 GW |
| Mississippi County | 7 | 1.7 GW |
| Jefferson County | 4 | 1.2 GW |
| Jackson County | 4 | 1.2 GW |
| Calhoun County | 3 | 1.1 GW |
| Craighead County | 4 | 950 MW |
| Ouachita County | 4 | 901 MW |
| Phillips County | 6 | 890 MW |
Common questions about power in Union County
How long does it take to get power for a data center in Union County, AR?
The median wait for a project still in the interconnection queue in Union County is 1.6 years. Across the US, most large loads are quoted three to seven years depending on the market and whether network upgrades are needed. 3 projects in Union County have reached energization and 11 were withdrawn, so the withdrawal rate here is a better guide to risk than any single quoted timeline.
How much capacity is available in Union County, AR?
870 MW is currently requested across 2 active interconnection requests, and 600 MW has actually been built. A queued megawatt is a request, not deliverable capacity — most queued projects are never built. For deliverable offtake capacity at a specific substation you need a utility study, not a queue.
Is Union County, AR a good site for a data center?
This page gives you the power half of that answer: what is queued, what has been energized, how long the wait runs, and which large load interconnection requests are already recorded nearby. The other half — the state policy position, moratoriums and large load tariffs — is on our Arkansas policy page.
Where does the data on this page come from?
The interconnection queue published by the transmission providers serving Union County — MISO — parsed and normalised by Watt Street. Every figure carries the date it was true. Data as of 14 October 2026.
Go deeper on Union County
The interactive map plots every one of these applications, and a generated county report puts them in a sourced PDF with the date each figure was true on every page.