Data centers and new power in St. Tammany Parish, LA
450 MW of new power is waiting to connect to the grid in St. Tammany Parish, LA — 1 active requests. Typical wait: 4.1 years. 0 projects are built, 4 withdrawn. Data as of 14 October 2026.
Is one near your house?
We have not mapped a large AI data center inside St. Tammany Parish 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 St. Tammany Parish
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 St. Tammany Parish 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Most requests in the US are withdrawn — a developer tests a site and moves on.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 St. Tammany Parish.
What kind of power is asking to connect
By capacity requested. Data as of 14 October 2026.
All the numbers
5 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 | 0 | 0 MW | 0.0% |
| Still waiting | 1 | 450 MW | 20.0% |
| Withdrawn | 4 | 600 MW | 80.0% |
| Paused | 0 | — | 0.0% |
Waiting to connect, by type of power
| Type | Projects | Capacity requested |
|---|---|---|
| Solar + battery | 1 | 450 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 5 by size
| Project | Type | Capacity | Status | Filed | Queue |
|---|---|---|---|---|---|
| MCKNIGHT - PLANT DANIEL 500.0kV | Solar + battery | 450 MW | active | 2022-09 | MISO |
| Talisheek - North Slidell 230kV Line | Solar + battery | 250 MW | withdrawn | 2020-06 | MISO |
| Talisheek - North Slidell 230kV Line | Solar + battery | 150 MW | withdrawn | 2020-06 | MISO |
| Mandeville - North Slidell 230kV Line (not listed on TTF, but both substations s | Solar + battery | 100 MW | withdrawn | 2021-08 | MISO |
| J2245 Substation | Solar | 100 MW | withdrawn | 2022-09 | MISO |
How St. Tammany Parish compares
#661 in the US · #14 in LA
St. Tammany Parish ranks #661 of 1,607 US counties by power waiting to connect, and #14 of 31 in Louisiana.
| County | Waiting | Capacity queued |
|---|---|---|
| Bossier Parish | 3 | 1.7 GW |
| Iberville Parish | 3 | 1.7 GW |
| Morehouse Parish | 6 | 1.2 GW |
| Ouachita Parish | 4 | 1.2 GW |
| Lafayette Parish | 3 | 943 MW |
| Jefferson Davis Parish | 5 | 890 MW |
| Rapides Parish | 3 | 830 MW |
| St. Landry Parish | 4 | 818 MW |
Common questions about power in St. Tammany Parish
How long does it take to get power for a data center in St. Tammany Parish, LA?
The median wait for a project still in the interconnection queue in St. Tammany Parish 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. 0 projects in St. Tammany Parish have reached energization and 4 were withdrawn, so the withdrawal rate here is a better guide to risk than any single quoted timeline.
How much capacity is available in St. Tammany Parish, LA?
450 MW is currently requested across 1 active interconnection requests, and 0 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 St. Tammany Parish, LA 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 Louisiana policy page.
Where does the data on this page come from?
The interconnection queue published by the transmission providers serving St. Tammany Parish — MISO — parsed and normalised by Watt Street. Every figure carries the date it was true. Data as of 14 October 2026.
Go deeper on St. Tammany Parish
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 St. Tammany Parish on the map County reports All of Louisiana