Data centers and new power in Rock County, WI
510 MW of new power is waiting to connect to the grid in Rock County, WI — 5 active requests. Typical wait: 4.1 years. 7 projects are built, 2 withdrawn. Data as of 14 October 2026.
Is one near your house?
We have not mapped a large AI data center inside Rock 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 Rock 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 Rock 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Most requests in the US are withdrawn — a developer tests a site and moves on.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 Rock County.
What kind of power is asking to connect
By capacity requested. Data as of 14 October 2026.
All the numbers
14 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 | 7 | 719 MW | 50.0% |
| Still waiting | 5 | 510 MW | 35.7% |
| Withdrawn | 2 | 140 MW | 14.3% |
| Paused | 0 | — | 0.0% |
Waiting to connect, by type of power
| Type | Projects | Capacity requested |
|---|---|---|
| Natural gas | 2 | 305 MW |
| Solar | 2 | 172 MW |
| Not stated | 1 | 33 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 14 by size
| Project | Type | Capacity | Status | Filed | Queue |
|---|---|---|---|---|---|
| RCEC Bradford - W. Darien 138kV Line | Solar | 250 MW | completed | 2017-06 | MISO |
| Rock River 138 kV Substations 1 (6 RICE) and 2 (5 RICE) | Natural gas | 205 MW | active | 2022-09 | MISO |
| Sunrise 138 kV Substation | Solar | 200 MW | completed | 2019-04 | MISO |
| Townline Road | Natural gas | 100 MW | active | 2022-09 | MISO |
| Beloit Gateway | Solar | 100 MW | active | 2022-09 | MISO |
| Wempletown - Rockdale 345kV Line Tap | Solar | 99 MW | completed | 2019-04 | MISO |
| J1304 POI 138 kV Substation | Solar | 75 MW | withdrawn | 2020-06 | MISO |
| New J1377 ATC Switching Station | Solar | 72 MW | active | 2025-10 | MISO |
| Paddock - Townline Rd 138 kV Line Tap | Solar | 65 MW | withdrawn | 2018-03 | MISO |
| Paddock - Townline Road 138kV Line | Solar | 65 MW | completed | 2019-04 | MISO |
| Sheepskin 69 kV Substation | Solar | 50 MW | completed | 2018-03 | MISO |
| Townline Rd. - Paddock 138kV | Not stated | 33 MW | active | 2022-08 | MISO |
| New Kitty Hawk 345kV substation | Natural gas | 30 MW | completed | 2016-11 | MISO |
| Sheepskin 69kV | Not stated | 25 MW | completed | 2022-05 | MISO |
How Rock County compares
#608 in the US · #7 in WI
Rock County ranks #608 of 1,607 US counties by power waiting to connect, and #7 of 18 in Wisconsin.
| County | Waiting | Capacity queued |
|---|---|---|
| Kenosha County | 6 | 1.9 GW |
| Portage County | 6 | 1.7 GW |
| Walworth County | 4 | 1.6 GW |
| Dane County | 3 | 1.3 GW |
| Columbia County | 6 | 1.3 GW |
| Fond du Lac County | 2 | 625 MW |
| Waushara County | 4 | 330 MW |
| Barron County | 3 | 295 MW |
Common questions about power in Rock County
How long does it take to get power for a data center in Rock County, WI?
The median wait for a project still in the interconnection queue in Rock County is 4.1 years. Across the US, most large loads are quoted three to seven years depending on the market and whether network upgrades are needed. 7 projects in Rock County have reached energization and 2 were withdrawn, so the withdrawal rate here is a better guide to risk than any single quoted timeline.
How much capacity is available in Rock County, WI?
510 MW is currently requested across 5 active interconnection requests, and 719 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 Rock County, WI 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 Wisconsin policy page.
Where does the data on this page come from?
The interconnection queue published by the transmission providers serving Rock 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 Rock 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.