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
- 2540 more...
- ItemBB017025 - Northern Pacific Engineering Drawing: Skew Span Over River, Bridge 113 - Big Blackfoot River, West of Bonner, Montana, undated
- ItemBB017026 - Northern Pacific Engineering Drawing: Skew Span Over River, Bridge 113 - Big Blackfoot River, West of Bonner, Montana, undated
- ItemBB017027 - Northern Pacific Engineering Drawing: Stress Sheet, Bridge 113 - Big Blackfoot River, West of Bonner, Montana, undated
- ItemBB017028 - Northern Pacific Engineering Drawing: Replace Top Lateral Span, Bridge 113 - Big Blackfoot River, West of Bonner, Montana, undated
- ItemBB017029 - Northern Pacific Engineering Drawing: Replace Stringer Angle Bracket, Bridge 113 - Big Blackfoot River, West of Bonner, Montana, undated
- ItemBB017030 - Northern Pacific Engineering Drawing: Survey Location River Bridge, Bridge 116 - Missoula River, West of Bonner, Montana, undated
- ItemBB017031 - Northern Pacific Engineering Drawing: Proposed Location/Arrangement, Bridge 116 - Missoula River, West of Bonner, Montana, undated
- ItemBB017032 - Northern Pacific Engineering Drawing: General Plan, Bridge 116 - Missoula River, West of Bonner, Montana, undated
- ItemBB017033 - Northern Pacific Engineering Drawing: Change in Construction, Bridge 116 - Missoula River, West of Bonner, Montana, undated
- 5179 more...