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Ironwood 500 kV Transmission Line Project

PERMITTING DASHBOARD PROJECT POSTING DATE: OCTOBER 06, 2026

All dates below are specific to the schedule of the Environmental Review and Permitting processes for this project.

Planned

ENVIRONMENTAL REVIEW AND PERMITTING STATUS
PLANNED

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ESTIMATED COMPLETION DATE OF ENVIRONMENTAL REVIEW AND PERMITTING
PENDING

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ENVIRONMENTAL REVIEW AND PERMITTING PROCESSES
COMPLETED

Electricity Transmission

SECTOR
Electricity Transmission

Project Category

CATEGORY
Project Category FAST-41 Covered Projects

Department of the Interior

LEAD AGENCY
Department of the Interior, Bureau of Land Management

Description:

The proposed Ironwood Transmission Line Project is an approximately 86-mile, 500-kilovolt (kV) transmission line extending between Arizona Public Service Company's North Gila Substation near Yuma, Arizona, and San Diego Gas & Electric's Imperial Valley Substation near El Centro, California. The Project would increase regional transmission capacity, improve electric system reliability, and support delivery of energy resources identified through the California Independent System Operator's (CAISO) 2022–2023 Transmission Plan.

The proposed alignment traverses approximately 47.6 miles of Bureau of Land Management (BLM) land, 8.8 miles of Bureau of Reclamation land, approximately 0.7 miles of California state land, and approximately 29.2 miles of private land. The Project is located primarily within existing designated utility corridors, including BLM Section 368 Energy Corridors, and generally parallels the existing Southwest Powerlink 500-kV transmission line to minimize new disturbance.