IP-660
1,650 MW hybrid in Owyhee, ID · In queue since June 2022 · Proposed COD December 2025
1,650 MW
Capacity
1
Components
Solar
3y 11m
In Queue
IA Executed
IA Status
Signed Sep 2023
Queue → IA
1y 3m
IA → COD
2y 3m
Total Duration
1y 3m
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: 18–30 months
Proposed COD: 2025-12-31
IP-660 is a proposed 1650 MW hybrid solar and battery project located in Owyhee County, Idaho. The project, developed by Sawtooth DevCo, LLC, consists of 1650 MW of solar generation. It is interconnected to the Idaho Power Company via the Hemingway 500kV Substation.
The project is in the IP interconnection queue with queue entry date of June 16, 2022, and a proposed commercial operation date of December 31, 2025. The interconnection agreement was executed on September 12, 2023, and the project's current status is listed as suspended.
Generated from interconnection queue and public data sources
State
ID
County
Owyhee
Grid Region
Mountain West
Market
—
Developer
Sawtooth DevCo, LLC
Utility
Idaho Power Company
Entity
IP
Service Type
—
Point of Interconnection
Hemingway 500kV Substation
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.
