• 2020-07-01

    Washington Aviation Economic Impact Study: Final technical report

    The Washington Aviation Economic Impact Study, published in July 2020 by the Washington State Department of Transportation (WSDOT), examines the economic contributions of airports across Washington State, including on-airport activities and off-airport visitor spending. Prepared by Kimley-Horn in partnership with EBP, WSP, and PRR, the study uses economic modeling tools such as IMPLAN to estimate jobs, output, and income generated by aviation activity statewide. The report also addresses how aviation economics changed over the study period, including the effects of COVID-19 on the industry.
  • 2020-01-28

    Multiple agency fiscal note summary: Transportation policy goals (HB 2688)

    House Bill 2688 proposes changes to Washington State's transportation system policy goals, requiring the Department of Transportation (WSDOT) to evaluate transportation projects submitted to the legislature using updated policy criteria. Multiple state agencies — including the Departments of Commerce, Health, Ecology, and the Interagency Council on Health Disparities — would be required to participate in these project evaluations, along with representatives from vulnerable and highly impacted communities. The fiscal impact on participating agencies is estimated to be non-zero but indeterminate, with the Department of Commerce alone estimating costs of between $21,000 and $35,000 per year.
  • 2020-01-22

    HB 2688 bill analysis: Expanding transportation policy goals

    Washington State House Bill 2688 proposes expanding and modifying the state's transportation policy goals by adding new priorities such as accessibility, health and resilience, and equity and environmental justice, while removing existing goals like mobility and stewardship. The bill would require all transportation projects to be evaluated against these updated goals and specific metrics before receiving budget authorization, with projects failing to meet a minimum score threshold being excluded from funding. The evaluation process would involve multiple state agencies and must include public input from vulnerable and highly impacted communities.
  • 2019-11-20

    SR 518 corridor planning study

    In November 2019, the Washington State Department of Transportation (WSDOT) presented findings from the SR 518 Corridor Planning Study to the Highline Forum in Des Moines, WA. The study, mandated by a 2017 legislative proviso and funded with $500,000 from the legislature plus an additional $400,000 from the Port of Seattle, examined traffic conditions and improvement alternatives along the SR 518 corridor near Sea-Tac Airport. The presentation covered traffic analysis, alternatives screening, and recommended improvement packages, with a final report due by November 30, 2019.
  • 2019-11-20

    Highline Forum agenda: End of year updates

    The Highline Forum held its end-of-year meeting on November 20, 2019, at Des Moines Beach Park Event Center, featuring updates on airport noise mitigation from the Port of Seattle's StART program, a SR 518 Corridor Study presentation by WSDOT, and planning discussions for 2020 meeting topics. The forum, co-chaired by Commissioner Felleman, brings together regional stakeholders to address issues related to Sea-Tac Airport's impact on surrounding communities. Six bimonthly meetings were scheduled for 2020, each running from 2:30pm to 4:30pm.
  • Washington State Department Of Transportation Commercial Aviation Coordinating Commission

    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. By January 1, 2022 the commission will develop recommendations to meet Washington state critical aviation system capacity needs. In addition to recommending a new
  • Commercial Aviation Coordinating Commission (Video)

    Commercial Aviation Coordinating Commission October 30, 10:00 am Agenda: Welcome/agenda review (introductions, binder orientation, defining the problem), highlights from legislation, Committee business (discussion of proposed charter, member responsibilities/nominations of chair & vice chair, overview of technical group topics), setting the stage/previous studies, discussion (Does the definition of commercial aviation make sense for this effort? Does
  • 2019-10-22

    Flight Corridor Safety Program: Tree Obstruction Analysis Overview and Removal Summary

    This draft document, updated October 2019, summarizes an obstruction removal study conducted near Seattle-Tacoma International Airport, identifying 174 trees that penetrate or are predicted to penetrate FAA-required airspace surfaces. The trees are distributed across multiple property owners, with WSDOT holding the largest share (102), followed by Highline School District (26), private owners (19), SeaTac (21), and the Port (6). The study, which involved LIDAR scanning, FAA-approved analysis, and field verification, classifies the obstructions as topped, existing, or potential future penetrations, with conifers making up the vast majority of affected trees.
  • Aviation Economic Impact Calculator

    Welcome to the WSDOT Aviation Economic Impact Calculator. This tool is designed to assist users in estimating an airport’s change in regional economic impacts based on potential changes in activity at the airport. The calculations in this tool are high-level estimates designed to give a sense of magnitude of economic impacts, but are not to