Great Northern Engineering Drawing: Air Dryer Foundation Standard Plans at Minot, North Dakota and Hillyard, Washington, prepared in 1966. Burlington Northern File Number 7482-1, Reference Number 10107, Sheet 001.

Great Northern Engineering Drawing: Blacksmith Shop at Hillyard, Washington, prepared in 1936. Burlington Northern File Number 8197-43, Reference Number 10101, Sheet 043.

Great Northern Engineering Drawing: Monorail System at Hillyard, Washington, prepared in 1938. Burlington Northern File Number 8947-9134, Reference Number 10104, Sheet 001.

Great Northern Engineering Drawing: Monorail System at Hillyard, Washington, prepared in 1938. Burlington Northern File Number 8947-9134, Reference Number 10105, Sheet 006.

Great Northern Engineering Drawing: Monorail System at Hillyard, Washington, prepared in 1938. Burlington Northern File Number 8947-9134, Reference Number 10104.

Great Northern Engineering Drawing: Monorail System at Hillyard, Washington, prepared in 1938. Burlington Northern File Number 8947-9134, Reference Number 10104.

Great Northern Engineering Drawing: Monorail System at Hillyard, Washington, prepared in 1938. Burlington Northern File Number 8947-9134, Reference Number 10104, Sheet 004.

Great Northern Engineering Drawing: Power Plant Pump Rod at Hillyard, Washington. Burlington Northern File Number SK-2043, Reference Number 101.

Great Northern Engineering Drawing: Roundhouse and Shops, Foundation Milling Machine at Hillyard, Washington, prepared in 1910. Burlington Northern File Number 8138, Reference Number 10106.

Great Northern Engineering Drawing: Roundhouse and Shops, Foundation Boring and Drilling Machine at Hillyard, Washington, prepared in 1910. Burlington Northern File Number 8138, Reference Number 10106.