Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3001 - Bridges
- 2871 more...
- ItemBB017401 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 0 - Silver Bow Creek, Butte, Montana, undated
- ItemBB017402 - Northern Pacific Engineering Drawing: Shop Plan - Laterals, Bridge 0 - Silver Bow Creek, Butte, Montana, undated
- ItemBB017403 - Northern Pacific Engineering Drawing: Shop Plan - Bents, Bridge 0 - Silver Bow Creek, Butte, Montana, undated
- ItemBB017404 - Northern Pacific Engineering Drawing: Shop Plan - Cross Frame, Bolts, Bridge 0 - Silver Bow Creek, Butte, Montana, undated
- ItemBB017405 - Northern Pacific Engineering Drawing: General Plan, Bridge 22.1 (22.2 ?), North of Stuart, Montana, 1929
- ItemBB017406 - Northern Pacific Engineering Drawing: Reinforcement Concrete Trestle, Bridge 50.1, North of Deer Lodge, Montana, 1928
- ItemBB017407 - Northern Pacific Engineering Drawing: Reinforcement Concrete Trestle, Bridge 20 - Cocolalla Creek, West of Cocolalla, Idaho, 1927
- ItemBB017408 - Northern Pacific Engineering Drawing: General and Masonry Plan, Bridge 21 - Cocolalla Creek, West of Cocolalla, Idaho, 1927
- ItemBB017409 - Northern Pacific Engineering Drawing: Concrete Box With Head Wall, Bridge 101.2 & Others, Washington, undated
- 4848 more...