Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1974. Burlington Northern File Number 9721, Reference Number 10108.

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1974. Burlington Northern File Number 9721, Reference Number 10107, Sheet 001.

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1968. Burlington Northern File Number 9721, Reference Number 10110, Sheet 004.

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1968. Burlington Northern File Number 9721, Reference Number 10109.

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1968. Burlington Northern File Number 9721, Reference Number 10110, Sheet 001.

Great Northern Engineering Drawing: Yard Office Duct Layout at Interbay, Washington, prepared in 1967. Burlington Northern File Number 9721-M1, Reference Number 10110, Sheet M-1.

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1967. Burlington Northern File Number 9721-E1, Reference Number 10110, Sheet E-1.

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1967. Burlington Northern File Number 9721-7, Reference Number 10110, Sheet A-7.

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1967. Burlington Northern File Number 9721-2, Reference Number 10110, Sheet A-2.

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1967. Burlington Northern File Number 9721-3, Reference Number 10110, Sheet A-3.