Commercial Aviation Coordinating Commission

Find information on the Commercial Aviation Coordinating Commission, a group created by the Legislature to develop recommendations to meet Washington state critical aviation system capacity needs.

The Commercial Aviation Coordinating Commission was created by the Legislature and tasked WSDOT Aviation to provide staff support for coordinating and administering the commission and technical assistance as requested by commission members.

The CACC aims to recommend a single preferred location for a new commercial service airport by June 15, 2023. In addition to recommending a new primary commercial aviation facility, the commission will recommend additional ways to accommodate capacity needs at other facilities.

We are responsible, according to the Legislature (PDF 76 KB), for the administration of the commission’s work while providing technical support to the commission members.

Communication to the public and stakeholders will be crucial for CACC. The communication plan will provide the following:

  • A logical and factual framework for understanding the issues that must be addressed by the CACC and for understanding how the decisions will be made.
  • Meaningful ways for people who want to be included and involved in the deliberations of the CACC.
  • Assure that major stakeholders, such as local governments, the aviation industry, airports, and regional planning agencies have timely information to assure meaningful input


Sign up for CACC list serv (will send periodic CACC update emails)
List of Commission Members (PDF 114KB)
Commission bios (PDF 35KB)
Commonly Asked Questions


CACC and WASP Roles 2022 (PDF 101KB)
CACC Report Feb. 2022 (PDF 396KB)



Online Open House Full Report Dec. 2021 (PDF 12MB)
CACC Phase 1 Fact Sheet (PDF 532KB)



Phase I CACC Report 2020 (PDF 210KB)
CACC Status Report as of July 2020 (PDF 716KB)


Online open house

The CACC Online Open House Sept. 20 - Dec. 8, 2021Closed

Upcoming events

Past meetings

June 23, 2022 1 p.m. - 3:30 p.m. - virtual meeting

April 20, 2022 10 a.m. - 11 a.m. - virtual webinar

Feb. 16, 2022, 10 a.m. - 11 a.m.- virtual webinar

Jan. 6, 2022, 9 a.m. - 11 a.m. - virtual meeting  

Dec. 7, 2021, 10 a.m. - 11:30 a.m. - virtual meeting

Nov. 10, 2021, 8:30 a.m. - 10 a.m. - virtual meeting and webinar

August 26, 2021, 9 a.m. - 1:30 p.m. virtual meeting

June 15, 2021, 10 a.m. - 11:30 a.m. webinar

April 29, 2021, 8:30 a.m. - 12 p.m. webinar and virtual meeting

Feb. 16, 2021, 9 a.m. - 10 a.m. virtual webinar

  • Webinar on federal and state funding
  • PowerPoint (Please email to obtain)

Dec. 9, 2020, 9 a.m. - 10 a.m. virtual webinar

  • Webinar on SeaTac Sustainability and UW ultrafine particulate studies
  • PowerPoint (Please email to obtain)

Oct. 21, 2020, 8 a.m. - 12 p.m. virtual meeting

July 22, 2020, 8 a.m. - 12 p.m. virtual meeting

April 2020 straw poll on a preferred strategy

Commissioners participated in a straw poll on a preferred strategy (no decision was made) for addressing Washington's aviation capacity and offered their preferences, along with comments on their reasons for doing so. The results of the poll are as follows:

1. Develop on large Sea-Tac-size airport: 0
2. Expand and/or improve one or more existing airports, to provide commercial and freight service: 7
3. Combine these strategies to meet near-term capacity needs from existing airports while conducting the processes necessary for a large new airport: 14
4. I don't know: 0
5. No answer: 4
Survey comments (PDF 202KB)

Jan. 9, 2020

Oct. 30, 2019

Commonly asked questions for the Commercial Aviation Coordinating Commission.

8,683 animals crossed the Snoqualmie Pass East Project area

as recorded by WSDOT and partners in 2020 and 2021.

46% increase in Amtrak Cascades ridership to 251,000 passengers

in 2021 compared to 172,000 in 2020.

Nine wetland and stream mitigation sites across 32.7 acres added

to our monitoring program in 2021 to help offset climate change impacts.