CENTENNIAL FLATS
750 MW hybrid in La Paz, AZ · In queue since April 2018 · Proposed COD April 2026
750 MW
Capacity
2
Components
Solar + Battery
8y 1m
In Queue
IA Executed
IA Status
Signed Jan 2023
Queue → IA
4y 9m
IA → COD
3y 3m
Total Duration
4y 9m
Schedule
1 months past proposed COD
Interconnection request submitted to ISO/RTO
CAISO uses cluster studies where projects are batched annually and studied together.
Typical: 36–48 months (IR to IA)
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 18–30 months
Proposed COD: 2026-04-15
The Centennial Flats project is a proposed 750 MW hybrid solar and battery energy storage development in La Paz County, Arizona. The project, located in the California Independent System Operator (CAISO) region, consists of a 500 MW solar photovoltaic array coupled with a 250 MW battery energy storage system. The project is being developed by DCRT.
The project, identified as CAISO-1529 in the CAISO interconnection queue, entered the queue on April 16, 2018, and has a proposed commercial operation date of April 15, 2026. An Interconnection Agreement (IA) for the project was executed on January 5, 2023. The point of interconnection is the Delaney-Colorado River 500 kV Line. The Centennial Flats project has been the subject of recent news coverage.
Generated from interconnection queue and public data sources
State
AZ
County
La Paz
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
DCRT
Entity
CAISO
Service Type
—
Point of Interconnection
Delaney-Colorado River 500 kV Line
Data Source
LBNL + Live
- ISO / RTO
- CAISO
- Trading Hub
- TH_SP15_GEN-APND
- Hub Confidence
- LOW
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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