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
- 2478 more...
- ItemBB016960 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam, etc., Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016961 - Northern Pacific Engineering Drawing: Shop Plan - Bearings/General, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016962 - Northern Pacific Engineering Drawing: Erection Plan/Details, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016963 - Northern Pacific Engineering Drawing: Replace Steel Details, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016964 - Northern Pacific Engineering Drawing: Replace End Stringer, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016965 - Northern Pacific Engineering Drawing: Pier 2 Repair/Anchor Bolt, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016966 - Northern Pacific Engineering Drawing: Steel Details, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016967 - Northern Pacific Engineering Drawing: Falsework Details, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- ItemBB016968 - Northern Pacific Engineering Drawing: Present Position of River, Bridge 91 - Hell Gate River, West of Nimrod, Montana, undated
- 5241 more...