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
- 2484 more...
- 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
- ItemBB016969 - Northern Pacific Engineering Drawing: General Plan/Detail Masonry, Bridge 59 (98) - Hell Gate River, West of Phosphate, Montana, 1908
- ItemBB016970 - Northern Pacific Engineering Drawing: Masonry as Constructed, Bridge 59 (98) - Hell Gate River, West of Phosphate, Montana, undated
- ItemBB016971 - Northern Pacific Engineering Drawing: Masonry Plan, Bridge 59 (98) - Hell Gate River, West of Phosphate, Montana, undated
- ItemBB016972 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 59 (98) - Hell Gate River, West of Phosphate, Montana, 1959
- ItemBB016973 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 59 (98) - Hell Gate River, West of Phosphate, Montana, 1948
- ItemBB016974 - Northern Pacific Engineering Drawing: Topgirder Spans Double Truss, Bridge 59 (98) - Hell Gate River, West of Phosphate, Montana, undated
- 5235 more...