Battery storage interconnection queue in Iowa

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 This shows every request: active, built and withdrawn.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 shown223,290 MW

Active in queue3,290 MW22 requests

Agreement signed100 MW2 requests

Withdrawn182,252 MW never built

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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

22 requests

Project	Capacity	Status	Location	Region	Queued	Online
Battery storage project J2469, Linn County Battery storage	300 MW	In study	Linn, IA	MISO	Sep 2022	target 2027
Surplus; J449 Battery storage	202 MW	In study	Mitchell, IA	MISO	Mar 2025	target 2027
Surplus; J1190 Battery storage	200 MW	In study	Clinton, IA	MISO	Jul 2025	target 2026
Battery storage project J3551, Mahaska County Battery storage	200 MW	In study	Mahaska, IA	MISO	Apr 2024	target 2027
Surplus; J416 Battery storage	200 MW	In study	Franklin, IA	MISO	Aug 2025	target 2026
Battery storage project J3780, Buchanan County Battery storage	200 MW	In study	Buchanan, IA	MISO	Apr 2024	target 2028
Battery storage project J2545, Buchanan County Battery storage	200 MW	In study	Buchanan, IA	MISO	Sep 2022	target 2026
Battery storage project J4173, Wapello County Battery storage	199 MW	In study	Wapello, IA	MISO	Oct 2025	target 2028
Battery storage project J4155, Linn County Battery storage	195 MW	In study	Linn, IA	MISO	Oct 2025	target 2029
Battery storage project J2653, Polk County Battery storage	170 MW	In study	Polk, IA	MISO	Sep 2022	target 2027
Battery storage project J2655, Polk County Battery storage	170 MW	In study	Polk, IA	MISO	Sep 2022	target 2026
Replacing 150 MW of coal generation with BESS at Lansing; Lansing 4 Battery storage	150 MW	In study	Allamakee, IA	MISO	Apr 2025	target 2026
Replacing 130 MW of coal generation with BESS at Lansing; Lansing 4 Battery storage	130 MW	In study	Allamakee, IA	MISO	Apr 2025	target 2026
Battery storage project J3159, Dubuque County Battery storage	100 MW	In study	Dubuque, IA	MISO	Sep 2022	target 2027
Battery storage project J2949, Marshall County Battery storage	100 MW	In study	Marshall, IA	MISO	Sep 2022	target 2027
Battery storage project J3158, Cerro Gordo County Battery storage	100 MW	In study	Cerro Gordo, IA	MISO	Sep 2022	target 2027
Battery storage project J2066, Henry County Battery storage	100 MW	In study	Henry, IA	MISO	Aug 2021	target 2022
Battery storage project J2120, Linn County Battery storage	100 MW	In study	Linn, IA	MISO	Aug 2021	target 2025
Battery storage project J4172, Wapello County Battery storage	99.0 MW	In study	Wapello, IA	MISO	Oct 2025	target 2028
Surplus; J495 Battery storage	75.0 MW	In study	Kossuth, IA	MISO	Jul 2025	target 2026
Battery storage project J1477, Scott County Battery storage	50.0 MW	Agreement signed	Scott, IA	MISO	Apr 2019	target 2024
Battery storage project J1229, Muscatine County Battery storage	50.0 MW	Agreement signed	Muscatine, IA	MISO	Apr 2019	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.

MISO (Midcontinent)22 · 3,290 MW

Requests by year joined

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

20192025

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)