Data centers and new power in Rockingham County, NH
0 MW of new power is waiting to connect to the grid in Rockingham County, NH — 0 active requests. 9 projects are built, 16 withdrawn. Data as of 14 October 2026.
Is one near your house?
We have not mapped a large AI data center inside Rockingham 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 Rockingham 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 Rockingham 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Most requests in the US are withdrawn — a developer tests a site and moves on.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 Rockingham County.
What kind of power is asking to connect
By capacity requested. Data as of 14 October 2026.
All the numbers
25 requests ever filed
Source: interconnection queues published by the transmission providers serving this county. 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 | 9 | 2.0 GW | 36.0% |
| Still waiting | 0 | 0 MW | 0.0% |
| Withdrawn | 16 | 4.5 GW | 64.0% |
| Paused | 0 | — | 0.0% |
Waiting to connect, by type of power
Key dates for projects here
no dated windows published
| Queue | What closes | Closes | Standing |
|---|---|---|---|
| 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 |
|---|---|---|---|---|---|
| Seabrook Power Uprate7 | Nuclear | 1.3 GW | completed | 2003-01 | ISONE |
| HVDC/AC Tie - Import only | Nuclear | 1.2 GW | withdrawn | 2015-02 | ISONE |
| Northern Pass Transmission Project (300 kV HVDC/AC Tie) - Import Only | Nuclear | 1.1 GW | withdrawn | 2015-02 | ISONE |
| Combined Cycle Capacity Increase/ Generator Change | Natural gas | 904 MW | withdrawn | 2007-09 | ISONE |
| Essential Power Newington - CNRC Increase | Natural gas | 596 MW | completed | 2016-04 | ISONE |
| Combined Cycle( See # 226) | Natural gas | 563 MW | withdrawn | 2006-08 | ISONE |
| Battery Storage | Batteries | 402 MW | withdrawn | 2023-03 | ISONE |
| Battery Storage | Batteries | 200 MW | withdrawn | 2023-09 | ISONE |
| Solar | Solar | 100 MW | withdrawn | 2023-07 | ISONE |
| GRE Capacity Uprate | Natural gas | 41 MW | completed | 2014-11 | ISONE |
| Combined Cycle Increase | Natural gas | 33 MW | withdrawn | 2014-10 | ISONE |
| Newington Gas Turbine Uprate | Natural gas | 28 MW | completed | 2014-12 | ISONE |
| EP Newington Energy Capacity Increase | Natural gas | 21 MW | completed | 2013-03 | ISONE |
| Seabrook LP Turbine Blade replacement | Nuclear | 13 MW | completed | 2008-10 | ISONE |
| Solar | Solar | 10 MW | withdrawn | 2015-09 | ISONE |
How Rockingham County compares
#1431 in the US · #6 in NH
Rockingham County ranks #1431 of 1,607 US counties by power waiting to connect, and #6 of 7 in New Hampshire.
| County | Waiting | Capacity queued |
|---|---|---|
| Cheshire County | 0 | 0 MW |
| Coos County | 0 | 0 MW |
| Grafton County | 0 | 0 MW |
| Hillsborough County | 0 | 0 MW |
| Merrimack County | 0 | 0 MW |
| Sullivan County | 0 | 0 MW |
Common questions about power in Rockingham County
How long does it take to get power for a data center in Rockingham County, NH?
We do not yet have a median wait for Rockingham County. Across the US, most large loads are quoted three to seven years depending on the market and whether network upgrades are needed. 9 projects in Rockingham County have reached energization and 16 were withdrawn, so the withdrawal rate here is a better guide to risk than any single quoted timeline.
How much capacity is available in Rockingham County, NH?
0 MW is currently requested across 0 active interconnection requests, and 2.0 GW 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 Rockingham County, NH 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 New Hampshire policy page.
Where does the data on this page come from?
The interconnection queue published by the transmission providers serving Rockingham County — the utilities in this area — parsed and normalised by Watt Street. Every figure carries the date it was true. Data as of 14 October 2026.
Go deeper on Rockingham 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.
Open Rockingham County on the map County reports All of New Hampshire