Shannon & Wilson, Inc. Share: Civil EngineeringConstruction ManagementEnvironmental EngineeringGeotechnical EngineeringHazardous WasteHydrology/Hydrogeology Shannon & Wilson, Inc. Visit Website 400 N 34th St Ste 100 Seattle, WA 98103 (206) 632-8020 (206) 695-6777 (fax) Map What's Nearby? Distance: 5 10 15 20 25 50 mi.