Mississippi Interconnection Queue: 202 Projects

202 projects sit in Mississippi's interconnection queue, according to our sealed grid-queue snapshot captured on June 11, 2026. Those 202 entries represent 9.9 GW of proposed generation and storage capacity — but a queue position is a request to connect, NOT a built, approved, or financed project. Interconnection queues are aspirational, and Mississippi's numbers make that reality unusually plain: 71.3% of its recorded projects have already withdrawn from the process.

That withdrawal share is what distinguishes Mississippi from most of the country. The national figure across 5 covered ISOs stands at 36.5% withdrawn. Mississippi's 71.3% is nearly double that rate. What that means for anyone reading this queue as a proxy for actual buildout: the headline count of 202 overstates active developer interest. The live working projects number 58 — those still holding their queue positions as of the snapshot date.

This report covers generation and storage projects sitting in the interconnection queues of the U.S. grid operators (ISOs and RTOs) that publish a machine-readable queue, as captured by our sealed daily grid snapshots. This is a census of the published queues, not of every project on every grid in the country. Mississippi projects may route through more than one ISO or RTO.

Key Findings

• 202 projects in Mississippi's queue represent 9.9 GW of total queued capacity, according to our sealed interconnection-queue snapshot.

• 71.3% of Mississippi's queue — 144 projects — have withdrawn, well above the national 36.5% withdrawn rate.

• 58 projects remain actively in-queue (28.7%), the fraction most relevant for near-term grid planning.

• Solar dominates at 60.4% of the fuel mix, with 122 Solar projects totaling 5,606 MW according to the sealed snapshot.

• The median project size is 150 MW, on par with the national median of 150 MW, indicating no skew toward unusually large or small entries in this queue.

• The largest single project on record is Morrow 161 kV Substation at 600 MW, according to the sealed interconnection-queue snapshot.

The Withdrawal Picture: What 71.3% Actually Means

The most analytically significant number in this data is not the headline 202. It is the 71.3% withdrawal rate.

An interconnection request is filed before a project is financed, sited, or permitted. Developers file early and speculatively — securing a queue position costs far less than building a plant. As interconnection studies reveal cost and complexity, a large share of applicants walk away. Mississippi's 144 withdrawn projects represent that attrition playing out over however many queue cycles MISO has run for this territory.

A queue withdrawal is not a project failure — it is the normal outcome of early-stage grid exploration. Mississippi's 71.3% rate tells you the state's queue has seen significant churn; the 58 still-in-queue projects are the ones that survived that filter.

For project developers and suppliers, the 58 remaining projects deserve more scrutiny than the 202 headline. Those 58 are the ones that have already cleared the initial feasibility hurdle — at least enough to not withdraw yet. For grid researchers, the 144 withdrawn count is also informative: it reveals how many developer teams assessed Mississippi as a viable location and then reconsidered.

The 9,858 MW figure in the sealed display represents the raw total queued capacity across all 202 records, withdrawn and active alike. The subset attributable to the 58 still-active projects is not separately sealed, so it cannot be stated here.

Mississippi's Queue at a Glance

This table summarizes the sealed headline figures for the Mississippi interconnection queue as of June 11, 2026.

The 0 operational count for Mississippi in this snapshot reflects how status is tracked: MISO groups statuses into withdrawn, operational (explicitly in-service or commercial operation), still-in-queue, and unknown. The display set shows no operational bucket for Mississippi, which does not mean no projects have ever reached commercial operation — it means the feed did not return operational-status records for this state slice in this snapshot.

The Fuel Mix: Solar at 60.4%

Solar makes up 60.4% of Mississippi's interconnection queue by project count — a share that runs well above the national Solar share of 39.0%. That concentration is worth pausing on. In most covered states, Solar leads the queue, but rarely at this magnitude. Mississippi's land availability, solar irradiance, and MISO queue dynamics appear to have channeled developer interest heavily toward utility-scale photovoltaic projects.

Solar: 122 projects, 5,606 MW

Solar is by far the dominant fuel type. With 122 projects and 5,606 MW of queued capacity, Solar represents the bulk of what developers have proposed for Mississippi grid connections. These are utility-scale PV projects — consistent with the 150 MW median — that would connect to MISO's transmission system in the Mississippi footprint. Developers filing Solar interconnection requests at this scale are generally working through engineering studies that can take one to two years and result in substantial upgrade costs assigned to the project.

Hybrid: 38 projects, 2,139 MW

Hybrid projects — typically Solar paired with Battery Storage — account for 38 entries totaling 2,139 MW. The Hybrid category reflects how developers have increasingly co-located generation and storage to improve project economics and dispatch flexibility. These filings are bucketed as Hybrid because our methodology groups projects whose ISO-reported technology label contains indicators of multiple fuel types.

Battery Storage: 25 projects, 500 MW

Battery Storage on its own contributes 25 projects and 500 MW. The relatively modest MW figure compared to the project count suggests these standalone storage entries tend toward smaller configurations than the co-located Hybrid entries above.

Wind: 12 projects, 809 MW

Wind makes up 12 projects and 809 MW. Mississippi's terrain and wind resource profile limit its Wind pipeline compared to states like Kansas or Iowa, and the 12 Wind entries here reflect that constrained resource base.

Natural Gas: 5 projects, 805 MW

Natural Gas rounds out the meaningful fuel types with 5 projects and 805 MW. Natural Gas interconnection filings often represent peaker or combined-cycle plants seeking to provide dispatchable capacity.

The table below shows the full fuel breakdown from the sealed snapshot.

How Mississippi Compares to Nearby States

Mississippi sits within MISO's footprint, alongside neighboring states that also route projects through that ISO. The comparison below draws from sealed display-set values for a selection of MISO-adjacent states plus the two highest-volume states nationally.

Mississippi's 9.9 GW is notably lower than most MISO neighbors of similar geography, reflecting both its smaller geographic footprint for interconnection requests and its high withdrawal rate removing capacity from the active pool. Louisiana at 23.7 GW and Arkansas at 32.9 GW each carry substantially more queued capacity despite being geographically comparable states, suggesting developer appetite has been stronger in those markets.

The full national index is available at US Interconnection Queue Index — June 2026 and the MISO interconnection queue report covers the full MISO footprint including Mississippi.

Methodology

Source: Public ISO/RTO interconnection-queue listings, via our grid-queue clock (sealed daily, content-hashed).

Honesty statement: All figures are computed directly from our sealed daily grid-queue snapshots; nothing is estimated, modeled, or extrapolated. Fuel and status labels are grouped from each ISO's own categories, and the grouping rules appear in the display set.

Scope: Generation and storage projects sitting in the interconnection queues of the U.S. grid operators (ISOs and RTOs) that publish a machine-readable queue, as captured by US Tech Automations' sealed daily grid snapshots. This is a census of the published queues, not of every project on every grid in the country.

The grid disclaimer — read this: A queue position is a request to connect, NOT a built, approved, or financed project. Interconnection queues are aspirational: a large share of projects withdraw before construction. Nothing in this report implies that queued capacity will be built or is coming online.

Fuel bucketing: Vendor fuel and technology labels differ by ISO and are grouped into Solar, Battery Storage, Wind, Natural Gas, Hybrid and Other by keyword.

Status bucketing: Each ISO publishes its own status taxonomy; statuses are grouped into withdrawn, operational (explicitly in-service or commercial operation), still-in-queue, and unknown for feeds that publish no status. Some ISOs drop withdrawn projects from their feed entirely. Mississippi routes through MISO, which does report withdrawn projects — the 71.3% figure reflects actual disclosed withdrawals in the feed.

How the clock works:

1. Collect. The research desk pulls each ISO's machine-readable queue listing on a daily schedule.

2. Normalize. Project records are parsed, fuel and status labels are bucketed using the keyword rules above, and state-level attribution is assigned by the ISO-reported point of interconnection.

3. Seal. Each daily snapshot is content-hashed (SHA) to create an append-only, tamper-evident ledger. The snapshot used here carries hash prefix 4938600b6a99772e and was sealed on June 11, 2026.

Frequently Asked Questions

Q: Does the 202 project count mean 202 projects are being built in Mississippi?
A: No. A queue position is a request to connect, not a built or approved project. Of the 202 recorded entries, 144 have already withdrawn. Only 58 remain actively in-queue as of June 11, 2026.

Q: Why is Mississippi's withdrawal rate so much higher than the national figure?
A: The 71.3% withdrawal rate versus the national 36.5% likely reflects queue cycles where many projects filed speculatively, encountered high interconnection upgrade costs in MISO's study process, and withdrew before construction. It is not unusual for older queue vintages to carry high withdrawal rates as projects that filed years ago have been resolved.

Q: What does "sealed snapshot" mean for this data?
A: Our grid-queue clock content-hashes each daily queue pull so the data is frozen and verifiable at a specific point in time — June 11, 2026. The figures here cannot change retroactively. If a project withdraws after that date, it will appear in the next sealed snapshot, not this one.

Q: Solar is 60.4% of Mississippi's queue by project count — is that unusually high?
A: Yes. The national Solar share across covered ISOs is 39.0%. Mississippi's 60.4% reflects a heavy concentration of Solar filings, likely driven by Mississippi's land availability and solar resource relative to other fuel types viable in the state.

Q: Are the Natural Gas and Wind projects likely to be built?
A: This report cannot answer that. Queue positions are not forecasts of construction. Whether any individual project advances depends on interconnection study outcomes, financing, permitting, and developer decisions that are outside the scope of this sealed snapshot.

Automating Grid Queue Monitoring

Teams that track interconnection queues manually — checking ISO portals, downloading spreadsheets, and reconciling state-level counts — face a recurring data maintenance problem. Queue files are updated frequently and the formats vary by ISO.

US Tech Automations builds workflow automations that can ingest structured queue feeds, detect when new projects file or existing projects withdraw, and route alerts to the analysts or procurement teams who need to act on that signal. The same automation patterns apply whether you are a solar developer watching MISO for siting signals, an EPC contractor tracking equipment demand, or an energy policy team maintaining a state-level dashboard.

Learn more at /platform/agentic-workflows, or explore the Solar interconnection queue report for a national view of the fuel type that dominates Mississippi's pipeline.

Source: US Tech Automations Research — computed from the sealed daily interconnection-queue snapshot, June 11, 2026.