February 20, 2026
Opening Briefs to the Supreme Court Filed
Tri-Cities C.A.R.E.S., Benton County and the Confederated Tribes and Band of the Yakama Nation filed their opening briefs to the Washington Supreme Court to seek reversal of the approval of the massive Horse Heaven Wind and Solar Project.
The numerous legal issues involved include the unacceptable timing of the Final Environmental Impact Statement (FEIS), balancing impacts of the project with state energy needs, key siting decisions and wildlife mitigations delegated to a closed-door advisory group (PTAG), long term environmental, cultural and visual impacts, land use conflicts and the Governor’s disregard for the record when approving the HH Project.
We three petitioners divided up this lengthy list of issues in our briefs.
Tri-Cities C.A.R.E.S. argues the Governor ignored the record when he eliminated all visual- impact mitigation, despite state experts finding the turbines would create significant, unavoidable, and long-term impacts across the region.
TCC requests that the Court “either reverse the Governor’s decision, or in the alternative, remand to the Governor with direction to a) provide findings, conclusions and reasoning on the adjudication record for his decisions on vista impact issues, b) conduct balancing required by RCW 80.50.010, and c) reconsider visual mitigations consistent with EFSEC’s findings and the FEIS.”
Briefs and Executive Summaries can be downloaded here:
Washington Courts - Public Document Access The case # is 1048777
February 21, 2026
Missing Public Comments Discovered in State’s Certified Record
Driving the news:
Tri-Cities C.A.R.E.S. and our attorney uncovered a major omission in the state’s certified administrative record: roughly 400 public comments — nearly 950 pages, overwhelmingly opposed to the Horse Heaven Hills Wind & Solar Project — were never transmitted to the courts.
Why it matters:
Had this gone undetected, the Washington Supreme Court would have never seen the full breadth of regional opposition, including statements from government bodies, economic organizations, nonprofits, and technical experts. These comments go directly to the substantive impacts of the project and the procedural defects that undermined EFSEC’s adjudication.
When developing their case for the Washington Supreme Court, all parties (TCC included) can cite ONLY items included in the administrative record to build and support their arguments. The inclusion of these missing comments is vital to TCC’s case.
Catch up quick:
The Attorney General’s Office certified the record as “complete” when sending it to Thurston County Superior Court — and later to the Washington Supreme Court in April 2025.
Between Jan. 19 and Feb. 3, 2026, TCC identified that hundreds of comments were missing.
After we raised the issue, Assistant Attorney General Jon Thompson issued a Feb. 2 letter acknowledging the omission and blaming a “coding error.”
The missing comments included major submissions from:
SE Washington legislators
Tri-Cities Association of Realtors
Tri-Cities Regional Chamber of Commerce
Lewis & Clark Trail Heritage Foundation
Badger Mountain Irrigation District
Audubon Society members
Port of Pasco
Expert witnesses for Tri-Cities C.A.R.E.S.
State’s position:
Thompson’s letter downplays the omission, stating the records “did not appear to EFSEC staff to be directed to the subject on which comments were being addressed” and were “not directly relevant” to the assignments of error.
The reality:
These comments are directly tied to multiple legal issues raised by Tri-Cities C.A.R.E.S., Benton County, and the Yakama Nation.
The state’s own filing admits EFSEC provided these records for inclusion — they were simply never transmitted to the WA Supreme Court by the AG’s office.
What’s next:
The AG’s office has now forwarded the missing documents to the Supreme Court.
To ensure they can be used at trial, TCC was forced to file a motion to include them — an unnecessary cost caused by the state’s error. The Court approved the motion on Feb. 11, 2026.
TCC’s brief to the Washington Supreme Court was submitted Friday, February 20, 2026.
Supplemental Petitions for Judicial Review
EFSEC and the Assistant Attorney General declared that the Administrative Record was complete on October 25, 2025, triggering a 21-day timeline and deadline for the submittal of Supplemental Petitions for Judicial Review to the Thurston County Superior Court.
TCC also submitted a separate Objection to EFSEC’s Adoption of Resolution 357 and incorporated it into the Supplemental Petition for Judicial Review.
The Supplemental Petitions for Judicial Review can be downloaded here:
Tri- Cities CARES (November 14, 2025 pdf files)
TCC SPFR
Benton County (November 14, 2025 pdf file)
Benton County SPFR
Yakama Nation (November 14, 2025 pdf file)
Yakama Nation SPFR
Resolution 357
Friends of the Gorge and TCC, and the Yakama Nation, also filed public comment objections to the Proposed Revision to Resolution 357.
These objections can be downloaded here:
TCC Objection and Motion to Reconsider November 14, 2025
Yakama Nation Letter November 14, 2025
Policy 16-01
Friends of the Gorge and TCC filed a lawsuit objecting to EFSEC’s adoption of Policy 16-01 on August 15, 2025. That lawsuit can be downloaded here:
FOTG TCC Petition for Judicial Review August 15, 2025.
FOTG TCC CRP Comment Letter on Policy 16-01 November 16, 2025
Petitions for Judicial Review
Petitions for Judicial Review were submitted by the Tri-Cities CARES, Benton County, and the Yakama Nation before the December 2, 2024 deadline.
These submittals trigger the process to take the issues to the Washington Supreme Court. The three petitions were submitted to Thurston County Superior Court. The three cases were consolidated by Judge Lanice into one single case:
Based on previous EFSEC cases, it will take one to two years to get a final answer from the Washington Supreme Court.
The Petitions for Judicial Review can be downloaded here:
Tri- Cities CARES (pdf file) A summary of the TCC petition is here.
Benton County (pdf file)
Yakama Nation (pdf file)
The Tri-Cities Herald has done several well written articles summarizing the problems each of the parties have with the way EFSEC and the Governor made their decision to approve the project.
December 2, 2024
3 lawsuits claim Inslee, regulators sidestepped state law to approve Eastern WA wind farm
A current and up-to-date listing of media coverage is available on the In the News page.