The Northwest Seaport Alliance is a marine cargo operating partnership of the Port of Seattle and Port of Tacoma.
Mailing address: P.O. Box 2985, Tacoma, WA 98401-2985
Email: [email protected]
Port of Seattle
P.O. Box 1209, Seattle, WA 98111
Port of Tacoma
P.O. Box 1837, Tacoma, WA 98401