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
- 2470 more...
- ItemBB016952 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 91 - Hell Gate River, West of Nimrod, Montana, 1951
- ItemBB016953 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 91 - Hell Gate River, West of Nimrod, Montana, 1951
- ItemBB016954 - Northern Pacific Engineering Drawing: Rebuilding Stringer Pedestal, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016955 - Northern Pacific Engineering Drawing: Rebuilding Stringer Pedestal, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016956 - Northern Pacific Engineering Drawing: 75 Foot Through Plate Girder Span, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016957 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016958 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016959 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016960 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam, etc., Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- 5249 more...