Hydro interconnection queue in the USA (2025 requests)

Before a new power plant or battery can connect to the US grid, it joins a queue for studies and an interconnection agreement. Most requests never get built. This shows every request: active, built and withdrawn.

Requests shown531.9 MW

Active in queue31.9 MW5 requests

Agreement signed0.1 MW1 requests

Withdrawn114.0 MW never built

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Project, developer, substation or county State Grid region Technology Status Year joined Sort

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Source: Lawrence Berkeley National Laboratory, Queued Up interconnection queue data (data through end of 2025). Map points are county centres, not exact sites.

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In studyAgreement signedUnder constructionBuiltSuspendedWithdrawn

Requests

5 requests

Project	Capacity	Status	Location	Region	Queued	Online
Hydro project J4200, Ramsey County Hydro	16.0 MW	In study	Ramsey, MN	MISO	Sep 2025	target 2008
Hydro project T2-077, Bighorn County Hydro	8.0 MW	In study	Bighorn, MT	West	Sep 2025
Hydro project PP00033, Montgomery County Hydro	6.3 MW	In study	Montgomery, NC	Southeast	Jun 2025	target 2026
Hydro project 977636, Anson County Hydro	1.5 MW	In study	Anson, NC	Southeast	Jun 2025
Hydro project 755, Gem County Hydro · Emmett Main Canal	0.1 MW	Agreement signed	Gem, ID	West	Jan 2025	target 2026

Capacity in the queue by state

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By grid region

ISO/RTO markets and the non-ISO West and Southeast.

Requests by year joined

Capacity of requests in this view, by the year they entered the queue. Click a year.

20112025

Source: Rand, J. et al., Queued Up, Lawrence Berkeley National Laboratory, data through end of 2025. Compiled from the queues of the 7 ISO/RTOs and dozens of non-ISO utilities. A request is a proposal to connect, not a commitment to build: historically most are withdrawn. Capacity is the requested interconnection size; hybrids include the storage component. Transmission lines · Planned power plants (EIA)