Great Northern Engineering Drawing: Yard Air Facilities Area Plan at Interbay, Washington, prepared in 1969. Burlington Northern File Number SK-2250, Reference Number 10110.

Great Northern Engineering Drawing: Hump Yard Control Building at Interbay, Washington, prepared in 1968. Burlington Northern File Number 9721, Reference Number 10110, Sheet 003.

Great Northern Engineering Drawing: Hump Yard Control Building at Interbay, Washington, prepared in 1967. Burlington Northern File Number 9721, Reference Number 10110, Sheet A-1.

Great Northern Engineering Drawing: Hump Yard Control Building at Interbay, Washington, prepared in 1967. Burlington Northern File Number 9721, Reference Number 10106.