3,786 Projects in the MISO Interconnection Queue

The Midcontinent grid operator carries one of the heaviest interconnection backlogs in the country: 3,786 projects sit in the MISO queue, totaling 299.6 GW of requested capacity in our sealed snapshot of June 11, 2026. That single number is the headline, and it deserves an immediate caveat. A queue position is a request to connect to the grid, not a built, approved, or financed plant. Interconnection queues are aspirational, and a large share of the projects on them never reach steel in the ground.

MISO proves the point in the same dataset. Of those 3,786 requests, 2,127 are already marked withdrawn — a 56.2% withdrawal rate. More projects have left this queue than remain active in it. So the right way to read 3,786 is not "299.6 GW of new generation arriving," but "a pipeline of developer intent, most of which will be filtered out before it ever energizes." This report is a cross-sectional census of one snapshot day; it counts what was published, not what will be built.

An interconnection queue is the ordered list of generation and storage projects that have formally applied to plug into a regional grid and are working through the operator's study process. Reading it well means separating ambition from outcome.

What the June 11 Snapshot Shows

• MISO lists 3,786 projects in its interconnection queue, according to the sealed interconnection-queue snapshot.

• The MISO queue totals 299.6 GW of requested capacity, per the same sealed snapshot.

• 2,127 MISO projects are already withdrawn — a 56.2% withdrawal rate.

• 1,659 MISO projects remain active, a 43.8% in-queue share.

• The largest single MISO request is SIOUX at 2,200 MW, per the sealed snapshot.

More than half of every project that ever entered this MISO snapshot — 56.2% — is now marked withdrawn. The queue is a filter, not a forecast.

That withdrawal share reframes the whole document. When a developer files an interconnection request, it is staking an early claim, often before land, financing, or offtake are locked. As study costs and network-upgrade estimates land, many of those claims are abandoned. MISO's 56.2% withdrawn tells you the screening is aggressive here.

The MISO Queue at a Glance

The table below pulls the headline figures for the MISO slice directly from the sealed snapshot. Capacity appears both in megawatts and gigawatts as published; status is split into the buckets our methodology defines.

The 150 MW median is worth a pause. A median that size, against a top request of 2,200 MW, says the queue is built from a broad base of utility-scale-but-not-giant projects with a thin tail of very large ones. That distribution matters for anyone reading the queue as a demand signal: most of the activity is mid-sized solar and storage, not a handful of mega-plants.

The Fuel Mix Behind the Queue

MISO's queue is solar-led. Solar is the single largest bucket by both project count and capacity, and it sets the character of the whole list. Below, the fuel breakdown comes straight from the snapshot's keyword-grouped categories.

Solar makes up 46.4% of the MISO queue, the dominant share by a wide margin. Read qualitatively, a solar-heavy queue tells you where developers see the cleanest path: abundant land, falling panel costs, and policy support across MISO's footprint. The 731 battery-storage requests are the second story — storage is increasingly paired with or chasing solar to firm intermittent output, which is also why hybrid projects show up as their own meaningful bucket.

Wind carries 61,078 MW across just 573 MISO projects — a smaller count but a high capacity-per-project profile typical of large Midwest wind farms.

The contrast between solar's project count and wind's capacity-per-project is the kind of distribution detail that recitation misses. Solar dominates on volume of requests; wind concentrates more megawatts into fewer, larger filings.

The thermal and legacy buckets round out the picture and deserve a brief read of their own. Natural gas shows just 83 projects but 21,422 MW, the densest capacity-per-project profile of any MISO fuel — gas filings are few but individually large, typically combined-cycle plants sized to anchor regional reliability. Nuclear (8 projects, 727 MW) and hydro (5 projects, 64 MW) are vestigial in the queue, which tells you new requests in MISO are overwhelmingly renewable and storage rather than conventional.

For a reader trying to size where the next decade of MISO connection activity is heading, the signal is unambiguous: solar leads on count, storage is the fast-rising second, gas remains the dense-but-rare reliability play, and the old baseload fuels are barely filing at all.

How MISO Compares Across the Snapshot

MISO is the busiest queue by project count in this snapshot — busier than CAISO, ERCOT, ISO-NE, and SPP on that measure. The comparison table uses each ISO's published headline figures. Read the position qualitatively: MISO leads on volume, CAISO leads on requested capacity, and the smaller eastern and central operators trail both.

Across all covered queues, the snapshot holds 10,618 projects and 1600.7 GW. MISO's 3,786 projects make it the largest single contributor of requests, even though CAISO's 492.2 GW edges it on capacity. Within MISO's own footprint, Michigan is the top state with 502 projects, per the sealed snapshot — a slice we break out in the Michigan interconnection queue report.

A caution on cross-ISO status reads: the withdrawal percentages are not comparable across operators, because some ISOs drop withdrawn projects from their feed entirely. MISO publishes a 56.2% withdrawn figure; an ISO showing 0.0% withdrawn is almost always a feed that omits withdrawn records, not a queue where nobody left.

Methodology and the Grid Disclaimer

This report draws on public ISO/RTO interconnection-queue listings, via the grid-queue clock (sealed daily, content-hashed). The 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.

All figures are computed directly from US Tech Automations' 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. Vendor fuel and technology labels differ by ISO and are grouped into Solar, Battery Storage, Wind, Natural Gas, Hybrid and Other by keyword. Each ISO publishes its own status taxonomy; statuses are grouped into withdrawn, operational, still-in-queue, and unknown for feeds that publish no status. Some ISOs drop withdrawn projects from their feed entirely.

The grid disclaimer, restated: a queue position is a request to connect, not a built, approved, or financed project. Nothing here is a forecast of capacity that will come online. MISO's own 56.2% withdrawal rate is the clearest in-snapshot evidence of how aspirational these lists are.

How we build the snapshot:

1. Collect. We pull each covered ISO's published interconnection-queue feed on its own schedule.

2. Normalize. Differing vendor fuel and status labels are mapped onto common buckets.

3. Seal. The day's normalized records are content-hashed and stored append-only, so the snapshot is reproducible.

4. Aggregate. We compute counts, capacity totals, medians, and status splits across the sealed records for the snapshot date.

Frequently Asked Questions

Q: What is an interconnection queue?
A: It is the ordered list of power projects — solar, wind, battery, gas — that have formally applied to connect to a regional grid and are moving through the operator's study process. MISO's queue held 3,786 such requests on June 11, 2026.

Q: Does a queue position mean the project will be built?
A: No. A position is a request to connect, not a built or financed plant. In MISO's snapshot, 2,127 of 3,786 projects — 56.2% — are already withdrawn, so most queue entries never energize.

Q: Why is the MISO withdrawal rate so high?
A: Developers often file early, before land, financing, or offtake are secured. As study costs and network-upgrade estimates arrive, many requests are dropped. A 56.2% withdrawn share reflects that aggressive filtering, not a snapshot error.

Q: Why is the median project only 150 MW when the largest is 2,200 MW?
A: The queue is built from a broad base of mid-sized utility projects plus a thin tail of very large ones. The 150 MW median tells you typical activity is moderate solar and storage, not mega-plants like the 2,200 MW SIOUX request.

Q: Can I compare MISO's withdrawal rate to other ISOs here?
A: Carefully. Some operators drop withdrawn projects from their feed, so a 0.0% withdrawn figure is a feed artifact, not a clean queue. MISO publishes withdrawn records, which is why its 56.2% looks high next to others.

Put Grid Data to Work

A sealed, daily queue snapshot is an early-demand signal for several audiences, each reading MISO's 3,786 projects differently.

Project developers siting the next request can read MISO's solar-led, 46.4%-solar mix and 150 MW median to gauge where the queue is crowded and where a differentiated filing might clear faster. EPC contractors and equipment suppliers can treat the 731 battery-storage and 388 hybrid requests as a forward order-book signal, timing inventory and crews to the technologies developers are actually filing. Utilities and policy researchers can track the 56.2% withdrawal rate as a measure of how much of the 299.6 GW is real intent versus speculative placeholders.

US Tech Automations builds the automation layer on top of that signal: watching the published feeds for changes, routing new or withdrawn filings to the right internal team, and drafting the first-pass outreach when a relevant project appears or moves. The same methodology runs across every covered queue — see the national picture in our US interconnection queue index and the technology lens in the solar interconnection queue report. You can explore the underlying sealed records at permits.ustechautomations.com, and see how we automate signal monitoring on the agentic workflows platform.

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