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Published: January 14, 2022

FERC Issues Ruling on Interregional Order 1000 Coordination

Contact: Patrick Damiano

On December 18, 2014, FERC issued its ruling on interregional coordination pursuant to Order 1000 pertaining to the four western planning regions (ColumbiaGrid, California ISO, Northern Tier Transmission Group, and WestConnect). ColumbiaGrid's jurisdictional transmission providers' (i.e. Avista, MATL, and PSE) compliance filings are due within 60 days of issuance of the order, such that the filings will be due no later than February 17, 2015. Bonneville Power Administration was also addressed in the order, though they are not subject to FERC's jurisdiction.

The FERC order was generally favorable in that the majority of the substance of the interregional compliance filings of the jurisdictional transmission providers of ColumbiaGrid was accepted by FERC. There were however, several items that the Commission directed the jurisdictional transmission providers of ColumbiaGrid to address, including directives articulated in paragraphs 26, 27, 83, 159, 166, and 167 of the order. A copy of the FERC order can be found at

Leading up to the February 17 compliance date, ColumbiaGrid will be working with its planning parties, particularly the three jurisdictional transmission providers, and the other three western planning regions (California ISO, Northern Tier Transmission Group, and WestConnect) to address the directives of the FERC order.

On a related matter, a copy of the First Amended and Restated Order 1000 Agreement can be found at and other interregional Order 1000 information at .


Member: Tacoma Power      Project: ColumbiaGrid     
Tacoma Power

"As a charter member of ColumbiaGrid, Tacoma Power has observed the benefits for its customers of regional transmission planning. Engaging in the ColumbiaGrid collaborative transmission planning process has fostered diverse and innovative solutions. This open process for identifying and resolving transmission challenges has delivered cost-effective reliability to our entire region."
~~ William A. Gaines, Director of Utilities