IP-558
120 MW generation in Jerome, ID · In queue since May 2019 · Proposed COD December 2020
120 MW
Capacity
1
Components
Solar
7 years
In Queue
IA Executed
IA Status
Signed Jul 2021
Queue → IA
2y 2m
Total Duration
2y 2m
Interconnection request submitted to ISO/RTO
Project undergoes interconnection studies to assess grid impact.
Typical: 18–36 months
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Construction pending
Typical: 12–24 months
Proposed COD: 2020-12-01
IP-558 is a proposed 120 MW solar generation project located in Jerome County, Idaho. The developer is Cat Creek Energy, LLC, and the interconnecting utility is Idaho Power Company. The project entered the IP interconnection queue on May 14, 2019, with a proposed commercial operation date of December 1, 2020. The interconnection agreement was executed on July 30, 2021. The point of interconnection is the Hunt_x0013_Milner 138kV Line.
The project's interconnection status is currently listed as suspended. Recent news coverage indicates development activity related to the project.
Generated from interconnection queue and public data sources
State
ID
County
Jerome
Grid Region
Mountain West
Market
—
Developer
Cat Creek Energy, LLC
Utility
Idaho Power Company
Entity
IP
Service Type
—
Point of Interconnection
Hunt_x0013_Milner 138kV Line
Data Source
LBNL
- ISO / RTO
- MOUNTAIN_WEST
- Trading Hub
- MID-C
- Hub Confidence
- UNKNOWN
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.
Last updated 2026-03-26
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