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
- 83 more...
- ItemBB014301 - Northern Pacific Engineering Drawing: General Plan, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, 1898
- ItemBB014302 - Northern Pacific Engineering Drawing: Piers/Abutments, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, undated
- ItemBB014303 - Northern Pacific Engineering Drawing: General/Masonry Plan, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, undated
- ItemBB014304 - Northern Pacific Engineering Drawing: General Plan/Mason Change, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, undated
- ItemBB014305 - Northern Pacific Engineering Drawing: Reinforcement of Girders, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, undated
- ItemBB014306 - Northern Pacific Engineering Drawing: Detail of Connection Plates, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, undated
- ItemBB014308 - Northern Pacific Engineering Drawing: Lateral/Cross Frames, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, undated
- ItemBB014309 - Northern Pacific Engineering Drawing: Shop Plan - Detail of Girder, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, undated
- ItemBB014310 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material, Bridge 79 (112) - Big Boulder River, West of Greycliff, Montana, undated
- 7636 more...