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Taxiway B environmental assessment

Details about the NEPA (National Environmental Policy Act) work associated with the Taxiway B project

King County International Airport-Boeing Field (KCIA or Airport), through the King County Department of Executive Services (Airport Sponsor), and in coordination with the Federal Aviation Administration (FAA), intends to undertake a variety of project improvements to meet current FAA safety and design standards at KCIA. Project improvements include relocating Taxiway B approximately 50 to 75 feet to the west and rehabilitating Runway 14R/32L. Other project components include, but are not limited to:

  • Demolition and/or removal of pavement
  • Demolition and relocation of the air traffic control tower (ATCT) and aircraft rescue and firefighting (ARFF) buildings
  • Land acquisition
  • Other support project components, such as stormwater facilities and fence construction.

To comply with the requirements of the National Environmental Policy Act (NEPA) and FAA Order 1050.1G, a Draft Environmental Assessment (EA) will be prepared for these project improvements. The Draft EA will describe the project improvements and the impacts associated with the implementation of the project improvements on environmental resource categories outlined in FAA Order 1050.1G. The Airport Sponsor is holding a scoping open house for the public and agencies to provide input regarding the issues to be addressed in the Draft EA. This scoping open house will describe the general characteristics of the project improvements and identify the environmental resource categories to be analyzed in the Draft EA.

Scoping Open House

Wednesday, April 15, 2026
5:30 - 7:30 p.m.
KCIA Flight Service Station
6526 Ellis Ave. S.
Seattle, WA 98108

This meeting, along with the 30-day comment period, will constitute the scoping process for the Draft EA. If an Environmental Impact Statement (EIS) is required by the FAA, this scoping meeting will serve as the scoping session for the EIS.

Comments on the scope for the EA can be emailed to KCIACommunityOutreach@kingcounty.gov.

Written comments can also be submitted via U.S. mail to:

King County International Airport-Boeing Field
ATTN: Eric Miller, Capital Project Manager
7277 Perimeter Rd. S., Suite 200
Seattle, WA 98108