Hydro interconnection queue in the USA

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 This shows every request: active, built and withdrawn.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 shown472,273 MW

Active in queue2,273 MW47 requests

Agreement signed402 MW22 requests

Withdrawn22415.9 GW 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

47 requests

Project	Capacity	Status	Location	Region	Queued	Online
Hydro project G0566, Lincoln County Hydro	646 MW	In study	Lincoln, MT	West	Jun 2017	target 2022
Hydro project G0490, Douglas County Hydro	345 MW	In study	Douglas, WA	West	Jul 2013	target 2022
Dworshak Fourth Unit Hydro	300 MW	In study	Clearwater, ID	West	Aug 2013	target 2019
Hydro project G0535, Walla Walla County Hydro	210 MW	In study	Walla Walla, WA	West	May 2016	target 2031
Hydro project 957349, Oconee County Hydro	112 MW	In study	Oconee, SC	Southeast	Jun 2024
Hydro project 437, Cascade County Hydro	70.0 MW	In study	Cascade, MT	West	Dec 2022
Hydro project J1213, Iron County Hydro	60.0 MW	Agreement signed	Iron, MO	MISO	Apr 2019	target 2024
Hawks Nest Hydro Hydro	51.0 MW	Agreement signed	Fayette, WV	PJM	Mar 2019	target 2028
Hydro project 20230829005, Lexington County Hydro · DESC - Generation	47.7 MW	Agreement signed	Lexington, SC	Southeast		target 2023
Hydro project GI-2014-7, Clear Creek County Hydro	42.0 MW	Agreement signed	Clear Creek, CO	West	Jul 2014	target 2019
Hydro project 648, Grainger County Hydro	32.0 MW	In study	Grainger, TN	Southeast	Sep 2024	target 2028
Hydro project E291 Hydro	27.0 MW	Agreement signed	TX	MISO	May 2012	2020
Hydro project 323, Marion County Hydro	27.0 MW	Agreement signed	Marion, TN	Southeast	Aug 2017	target 2022
Hydro project 322, Marion County Hydro	27.0 MW	Agreement signed	Marion, TN	Southeast	Aug 2017	target 2021
Hydro project Q63, Kootenai County Hydro	26.0 MW	Agreement signed	Kootenai, ID	West		target 2028
Hydro project 63, Kootenai County Hydro	26.0 MW	Agreement signed	Kootenai, ID	West	Jun 2018	target 2028
Hydro project 655, Hamilton County Hydro	24.0 MW	In study	Hamilton, TN	Southeast	Sep 2024	target 2028
Hydro project 654, Hamilton County Hydro	24.0 MW	In study	Hamilton, TN	Southeast	Sep 2024	target 2028
Hydro project LGE-GIS-2011-003, Jefferson County Hydro	21.0 MW	Agreement signed	Jefferson, KY	Southeast	Feb 2011	target 2013
Hydro project 476, Lyon County Hydro	18.0 MW	In study	Lyon, KY	Southeast	Apr 2021	target 2027
Hydro project J4200, Ramsey County Hydro	16.0 MW	In study	Ramsey, MN	MISO	Sep 2025	target 2008
Hydro project 320, Marion County Hydro	11.0 MW	Agreement signed	Marion, TN	Southeast	Aug 2017	target 2019
Hydro project 321, Marion County Hydro	11.0 MW	Agreement signed	Marion, TN	Southeast	Aug 2017	target 2021
Hydro project 458, Broadwater County Hydro	10.4 MW	In study	Broadwater, MT	West	Apr 2024
Hydro project 957051, Jackson County Hydro	9.9 MW	In study	Jackson, NC	Southeast	Jun 2024
Hydro project T2-077, Bighorn County Hydro	8.0 MW	In study	Bighorn, MT	West	Sep 2025
Hydro project 590, Marion County Hydro	7.0 MW	In study	Marion, TN	Southeast	Nov 2023	target 2028
Hydro project 570430, Montgomery County Hydro · Duke Energy Progress, LLC	6.3 MW	Under construction	Montgomery, NC	Southeast	Jun 2022	target 2025
Hydro project PP00033, Montgomery County Hydro	6.3 MW	In study	Montgomery, NC	Southeast	Jun 2025	target 2026
Hydro project 899433, Montgomery County Hydro · Duke Energy Progress, LLC	6.3 MW	Under construction	Montgomery, NC	Southeast	Jun 2023
Hydro project LGE-GIS-2011-005, Mercer County Hydro	6.0 MW	Agreement signed	Mercer, KY	Southeast	Nov 2011	target 2013
Hydro project GI-2012-1, Boulder County Hydro	5.0 MW	Agreement signed	Boulder, CO	West	Jan 2012	target 2012
Hydro project GI-2020-18, Mesa County Hydro	4.5 MW	Agreement signed	Mesa, CO	West	Dec 2020	target 2022
Lassen Lodge Hydroelectric Hydro	4.5 MW	Agreement signed	Tehama, CA	CAISO	Mar 2011	target 2027
Hydro project 659, Loudon County Hydro	4.0 MW	In study	Loudon, TN	Southeast	Oct 2024	target 2028
Hydro project J1826, Dakota County Hydro	4.0 MW	In study	Dakota, MN	MISO	Sep 2022	target 2024
Hydro project 658, Loudon County Hydro	3.0 MW	In study	Loudon, TN	Southeast	Oct 2024	target 2028
Hydro project J3219, Dakota County Hydro	3.0 MW	In study	Dakota, MN	MISO	Sep 2022	target 2023
Hydro project 457, Lewis And Clark County Hydro	2.2 MW	In study	Lewis And Clark, MT	West	Mar 2024	target 2025
Hydro project 897387, Macon County Hydro	2.0 MW	Under construction	Macon, NC	Southeast	Jun 2023
Hydro project 899609, Jackson County Hydro	1.8 MW	Agreement signed	Jackson, NC	Southeast	Jun 2023	target 2026
Hydro project 899793, Jackson County Hydro	1.5 MW	Agreement signed	Jackson, NC	Southeast	Jun 2023	target 2026
Hydro project 977636, Anson County Hydro	1.5 MW	In study	Anson, NC	Southeast	Jun 2025
Hydro project 1186, Bannock County Hydro · Commercial Energy Management, Inc.	0.9 MW	Agreement signed	Bannock, ID	West	Oct 2019	target 2021
Lassen Lodge Hydroelectric 2 Hydro	0.5 MW	Agreement signed	Tehama, CA	CAISO	Apr 2013	target 2027
Hydro project 973, Franklin County Hydro · City of Preston	0.4 MW	Agreement signed	Franklin, ID	West	Nov 2017	target 2018
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)