Northern Pacific Engineering Drawing: Subway Under 7th Street at Olympia, Washington, prepared in 1911. Burlington Northern File Number 272-30, Reference Number 10109.

Northern Pacific Engineering Drawing: Subway Under 7th Street - General Plan at Olympia, Washington, prepared in 1911. Burlington Northern File Number 272-30, Reference Number 10109.

Northern Pacific Engineering Drawing: Subway Under 7th Street at Olympia, Washington, prepared in 1910. Burlington Northern File Number 272-30, Reference Number 10111.

Northern Pacific Engineering Drawing: Subway Under 7th Street at Olympia, Washington, prepared in 1891. Burlington Northern File Number 272-30, Reference Number 10102.

Northern Pacific Engineering Drawing: Subway Under 7th Street at Olympia, Washington, prepared in 1890. Burlington Northern File Number 272-30, Reference Number 10108.

Northern Pacific Engineering Drawing: Section Tool House at Olympia, Washington, prepared in 1967. Burlington Northern File Number 5146, Reference Number 10110, Sheet 001.

Northern Pacific Engineering Drawing: Sanitary Toilet at Car Repair Track and Septic Tank With New Sewer for Depot at Olympia, Washington, prepared in 1955. Burlington Northern File Number 5147, Reference Number 10106, Sheet 002.

Northern Pacific Engineering Drawing: Sanitary Toilet at Car Repair Track and Septic Tank With New Sewer for Depot at Olympia, Washington, prepared in 1955. Burlington Northern File Number 5147, Reference Number 10105, Sheet 001.

Northern Pacific Engineering Drawing: Depot at Olympia, Washington, prepared in 1966. Burlington Northern File Number 5147, Reference Number 10102, Sheet 001.

Northern Pacific Engineering Drawing: Depot at Olympia, Washington, prepared in 1966. Burlington Northern File Number 5147, Reference Number 10102, Sheet 005.