Great Northern Engineering Drawing: Hump Yard Control Building at Interbay, Washington, prepared in 1968. Burlington Northern File Number 9721, Reference Number 10110, Sheet 003.

Great Northern Engineering Drawing: Interlocking Tower at North Portal at Seattle, Washington, prepared in 1956. Burlington Northern File Number 9464-2, Reference Number 10104.

Great Northern Engineering Drawing: Interlocking Tower at North Portal (original structure) at Seattle, Washington, prepared in 1927. Burlington Northern File Number 9464-1, Reference Number 10102.

Great Northern Engineering Drawing: Line Change at Kootenai River, Montana, prepared in 1969. Burlington Northern File Number 9655, Reference Number 10109.

Great Northern Engineering Drawing: Line Change at Kootenai River, Montana, prepared in 1969. Burlington Northern File Number 9655, Reference Number 10109.

Great Northern Engineering Drawing: Line Change at Kootenai River, Montana, prepared in 1969. Burlington Northern File Number 9655, Reference Number 10109.

Great Northern Engineering Drawing: Line Change at Kootenai River, Montana, prepared in 1969. Burlington Northern File Number 9655, Reference Number 10109.

Great Northern Engineering Drawing: Line Change at Kootenai River, Montana, prepared in 1969. Burlington Northern File Number 9655, Reference Number 10109.

Great Northern Engineering Drawing: Line Change at Kootenai River, Montana, prepared in 1969. Burlington Northern File Number 9655, Reference Number 10109.

Great Northern Engineering Drawing: Line Change Tool House at Libby, Montana, prepared in 1964. Burlington Northern File Number 9655-1, Reference Number 10104.