Great Northern Engineering Drawing: Towers 3 - 4 and 5 - 6, Bridge 385.1, east of Berne, Washington, Line Segment 037, Milepost 1696.5. Sheet 293 - 5481 - 16, 1947.

Great Northern Engineering Drawing: Trolley Pole Bracket, Bridge 385.1, east of Berne, Washington, Line Segment 037, Milepost 1696.5. Sheet 293 - 5481 - 15, 1947.

Great Northern Engineering Drawing: Cascade Tunnel at Berne, Washington, prepared in 1956. Burlington Northern File Number 9531-9, Reference Number 10102.

Great Northern Engineering Drawing: Cascade Tunnel at Berne, Washington, prepared in 1956. Burlington Northern File Number 9531, Reference Number 10105, Sheet 001.

Great Northern Engineering Drawing: Cascade Tunnel at Berne, Washington, prepared in 1956. Burlington Northern File Number 9531, Reference Number 10105.

Great Northern Engineering Drawing: Cascade Tunnel at Berne, Washington, prepared in 1971. Burlington Northern File Number 9531, Reference Number 10106, Sheet 002.

Great Northern Engineering Drawing: Cascade Tunnel at Berne, Washington, prepared in 1971. Burlington Northern File Number 9531, Reference Number 10106, Sheet 001.

Great Northern Engineering Drawing: Cascade Tunnel at Berne, Washington, prepared in 1975. Burlington Northern File Number 9531-9, Reference Number 10104.

Great Northern Engineering Drawing: Cascade Tunnel at Berne, Washington, prepared in 1975. Burlington Northern File Number 9531-9, Reference Number 10104.