Taxiway B environmental assessment

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.

Public comment period extended

King County International Airport-Boeing Field (KCIA), in coordination with the Federal Aviation Administration (FAA), has extended the public comment period on the draft environmental analysis (Draft EA) for the Taxiway B Relocation project by three weeks.

The original deadline was Friday, November 13 at 5 p.m. Pacific Standard Time.

The new deadline is Friday, December 4, 2026 at 5 p.m. Pacific Standard Time.

Materials from the project's open house and the Draft EA document can be found on the airport's website at kingcounty.gov/airport/taxiway-b-nepa.

How to comment

Emailed comments on the Draft EA may be sent to KCIACommunityOutreach@kingcounty.gov.

Comments may 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