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
- 5345 more...
- ItemBB020441 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material Washers, Bridge 124 - Underpass, South of Ridgefield, Washington, undated
- ItemBB020442 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material Bolts, Bridge 124 - Underpass, South of Ridgefield, Washington, undated
- ItemBB020443 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material Bolts, Bridge 124 - Underpass, South of Ridgefield, Washington, undated
- ItemBB020444 - Northern Pacific Engineering Drawing: General Plan and Masonry Detail, Bridge 43, North of Deer Lodge, Montana, 1928
- ItemBB020445 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 43, North of Deer Lodge, Montana, undated
- ItemBB020446 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 43, North of Deer Lodge, Montana, undated
- ItemBB020447 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 43, North of Deer Lodge, Montana, undated
- ItemBB020448 - Northern Pacific Engineering Drawing: Shop Plan - Fixed Beam, Stringers, Bridge 43, North of Deer Lodge, Montana, undated
- ItemBB020449 - Northern Pacific Engineering Drawing: General and Masonry Plan, Bridge 30.1 - Boulder River, West of Lime Spur, Montana, 1928
- 2374 more...