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

Great Northern Engineering Drawing: Yard Office at Interbay, Washington, prepared in 1967. Burlington Northern File Number 9721-6, Reference Number 10110, Sheet A-6.

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 at Interbay, Washington, prepared in 1974. Burlington Northern File Number 9721-E5, Reference Number 10105.

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 10109.

Great Northern Engineering Drawing: Yard Office Addition, at Balmer Yard at Interbay, Washington, prepared in 1974. Burlington Northern File Number 9721-12, Reference Number 10105.

Great Northern Engineering Drawing: Yard Office Addition, at Balmer Yard at Interbay, Washington, prepared in 1974. Burlington Northern File Number 9721-13, Reference Number 10107.