Interconnection Queue Monitor

Monitors US grid interconnection queues — the official waiting lists of every power plant and battery project seeking to connect to the grid — and reports each change as structured data:

• "A new 200 MW battery project entered the PJM queue in Ohio."
• "This solar project moved from Phase 1 to GIA — it's getting real."
• "Competitor X's project was withdrawn." / "Project Y just reached commercial operation."
• "The proposed COD slipped two years."

Coverage: CAISO (California), PJM (13 Mid-Atlantic/Midwest states), MISO (15 Central US states) — together roughly 15,000 tracked queue positions. Sources are the ISOs' official public queue reports. (ERCOT, NYISO, ISO-NE are on the roadmap; their downloads sit behind aggressive bot protection.)

Who uses this

• Project developers — track competing projects near your POI, spot withdrawals that free up headroom.
• Land agents & site originators — new queue entries reveal who is developing where, months before permits.
• Equipment vendors & EPCs — projects advancing to later study phases are buying signals.
• Investors & analysts — queue trends by fuel/region without manually diffing spreadsheets.

How it works

Each run downloads the current queue from every selected ISO, normalizes projects into a common shape, and diffs them against the snapshot from the previous run (kept in a named key-value store). Only changes matching your filters are output. Schedule it daily or weekly for a continuous feed.

• The first run per ISO establishes the baseline (silent by default — see emitBaselineRecords).
• If an ISO's download fails, its snapshot stays untouched and the other ISOs still process — a flaky source can't produce phantom changes.
• Withdrawn-to-withdrawn noise is suppressed unless you opt in (includeWithdrawn).

Input

{
    "isos": ["CAISO", "PJM", "MISO"],
    "fuels": ["solar", "battery", "hybrid"],
    "states": ["CA", "OH", "IL"],
    "minCapacityMW": 50,
    "emitBaselineRecords": false
}

Field	Type	Description
isos *	string[]	CAISO, PJM, MISO (any subset).
fuels	string[]	solar, wind, battery, hybrid (co-located, e.g. solar+storage), gas, nuclear, hydro, geothermal, biomass, coal, oil, other. Empty = all.
states	string[]	2-letter codes. Empty = all.
minCapacityMW	integer	Minimum project size. Default 0.
includeWithdrawn	boolean	Also track projects that are already withdrawn. Transitions into withdrawn are always reported. Default false.
emitBaselineRecords	boolean	Push all matching projects as baseline on the first run. Queues are large (PJM ~9,000 rows) — leave off unless you want the full current picture. Default false.
snapshotStoreName	string	Named KV store for snapshots between runs.

Output

One dataset record per changed project, largest capacity first:

{
    "iso": "CAISO",
    "queueId": "CAISO-17",
    "projectName": "SONORAN 2",
    "state": "CA",
    "county": "RIVERSIDE",
    "utility": "SCE",
    "poi": "Colorado River Substation 230 kV",
    "fuel": "hybrid",
    "fuelRaw": "Photovoltaic + Battery",
    "capacityMW": 400,
    "status": "withdrawn",
    "previousStatus": "active",
    "statusRaw": "WITHDRAWN",
    "studyPhase": "IA: Executed",
    "queueDate": "2019-04-10",
    "proposedCOD": "2027-06-01",
    "changeType": "project_withdrawn",
    "changes": [
        { "field": "status", "kind": "status_changed", "old": "active", "new": "withdrawn" }
    ],
    "queueUrl": "https://www.caiso.com/library/public-queue-report",
    "detectedAt": "2026-07-10T15:41:05.892Z",
    "source": "CAISO public interconnection queue"
}

changeType values

Value	Meaning
baseline	First run for an ISO — current state of a project (opt-in).
new_project	New queue entry appeared.
project_withdrawn	Project left the queue (withdrawn/retracted/canceled).
project_in_service	Project reached commercial operation.
project_suspended	Project suspended.
status_changed	Other status transition.
capacity_changed	MW figure changed (see oldCapacityMW).
cod_changed	Proposed/actual commercial operation date changed (see previousCOD).
phase_changed	Study phase / interconnection agreement status advanced.
project_updated	Other material change (POI, name, transmission owner).
removed_from_queue	Row disappeared from the source report entirely.

The run summary (per-ISO counts, failures) is stored under the OUTPUT key of the default key-value store.

Data sources & update cadence

ISO	Source	Typical update
CAISO	Public Queue Report (XLSX)	~monthly
PJM	Planning API queue export (XLSX)	~daily
MISO	GI Queue API (JSON)	~weekly

Daily scheduling is safe — unchanged sources simply produce zero records.