Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3005 - Signals
- 10 more...
- ItemBB029750 - Burlington Northern Engineering Drawing: Steel Details, Signal Bridge, Bonners Ferry, Idaho, 1968
- ItemBB029867 - Burlington Northern Engineering Drawing: Steel Design, Signal Bridges - Merritt & Berne, Berne, Merritt, Washington, 1966
- ItemBB029885 - Burlington Northern Engineering Drawing: Steel Design, Signal Bridge, Burnaby, British Columbia, 1968
- ItemBB029886 - Burlington Northern Engineering Drawing: General Plan, Signal Bridge, Burnaby, British Columbia, 1969
- ItemBB029887 - Burlington Northern Engineering Drawing: Steel Design, Signal Bridge, Burnaby, British Columbia, 1969