MISO-J3551
200 MW storage in Mahaska, IA · In queue since April 2024 · Proposed COD September 2027
200 MW
Capacity
1
Components
Battery
2y 1m
In Queue
—
IA Status
COD target: 2027
Total Duration
3y 5m
Interconnection request submitted to ISO/RTO
MISO uses the Definitive Planning Phase (DPP) process with 3 study phases.
Typical: 30–40 months (historical); 12 months target
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2027-09-10
MISO-J3551 is a proposed 200 MW battery storage project located in Mahaska County, Iowa. The project, under consideration by MidAmerican Energy Co., is interconnected within the Midcontinent Independent System Operator (MISO) region. It entered the MISO interconnection queue on April 18, 2024, with a proposed commercial operation date of September 10, 2027.
The project consists entirely of battery storage, with a total capacity of 200 MW. As of the latest data, the project is listed as active in the interconnection queue.
Generated from interconnection queue and public data sources
State
IA
County
Mahaska
Grid Region
MISO (Midcontinent)
Market
ISO/RTO Member
Developer
—
Utility
MIDAMERICAN ENERGY CO.
Entity
MISO
Service Type
—
Point of Interconnection
BEACON
Data Source
LBNL + Live
- ISO / RTO
- MISO
- Trading Hub
- MINN.HUB
- Hub Confidence
- HIGH
- POI Substation
- Beacon Substation
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
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