Great Northern Engineering Drawing: Fuel Oil Column at Omak, Washington, prepared in 1943. Burlington Northern File Number 11057-1, Reference Number 10105, Sheet 001.

Great Northern Engineering Drawing: Fuel Oil Storage Tank at Omak, Washington, prepared in 1945. Burlington Northern File Number 223-5643-1, Reference Number 10105, Sheet 001.

Great Northern Engineering Drawing: unnamed structure at Omak, Washington, prepared in 1979. Burlington Northern File Number 1484, Reference Number 10110, Sheet A-2.

Great Northern Engineering Drawing: unnamed structure at Omak, Washington, prepared in 1979. Burlington Northern File Number 1484, Reference Number 10110, Sheet A-1.