Environmental Assessment and Addendum: File 224-78-R and 210-79-U — Proposed Boeing Corporate Headquarters Facility, Port Of Seattle, February 8, 1979

This 1979 environmental assessment from King County's Department of Planning & Community Development evaluates the Port of Seattle's application to rezone approximately five acres near Sea-Tac Airport to allow Boeing to build a corporate headquarters facility, including offices, parking, and a heliport. The proposed Phase I development would include a two-story building with roughly 95,000 square feet of office space and parking for 235 cars, with approximately 200 employees on site. The document also outlines the county's land use history and ordinances governing development on the west side of Sea-Tac Airport, emphasizing protections for adjacent residential neighborhoods.

Notes

Environmental Assessment and Preliminary Report to the Zoning & Subdivision Examiner, Department of Planning & Community Development, Building and Land Development Division, King County, dated February 8, 1979. Files 224-78-R (zone reclassification from RS 7200 to RM 900-P) and 210-79-U (Unclassified Use Permit for heliport). Applicant is Port Of Seattle; proponent is The Boeing Company, 7755 East Marginal Way S., Seattle, WA 98108, attention Donald C. Davis. Covers proposed Boeing Corporate Headquarters Facility on approximately 5 acres within a 30-acre parcel on the east side of 12th Ave. S. between 167th St. and 172nd St., Sea-Tac Airport west side. Phase I includes a two-story building with 95,000 sq ft office space, 55,000 sq ft support facilities, parking for 235 cars, approximately 200 employees. File 210-79-U requests heliport permit for approximately two round trips per day. History covers King County Ordinance #3812 (July 24, 1978), Highline Communities Plan (Ordinance #3538), Sea-Tac Communities Plan (Ordinance #2883), Resolution No. 34259 (December 11, 1967), King County Council Motion #2957, and March 23, 1978 public hearing proceedings.

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