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
- 417 more...
- ItemBB014662 - Northern Pacific Engineering Drawing: Plan/Detail Pier/Abutment, Bridge 37 - Little Blackfoot Creek, Avon, Montana, 1909
- ItemBB014664 - Northern Pacific Engineering Drawing: Proposed Footwalk, Bridge 37 - Little Blackfoot Creek, Avon, Montana, undated
- ItemBB014665 - Northern Pacific Engineering Drawing: Plan/Detail Pier/Abutment, Bridge 38 - Little Blackfoot Creek, West of Avon, Montana, 1909
- ItemBB014666 - Northern Pacific Engineering Drawing: Plan/Elevation Abutment, Bridge 38 - Little Blackfoot Creek, West of Avon, Montana, undated
- ItemBB014667 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 38 - Little Blackfoot Creek, West of Avon, Montana, undated
- ItemBB014668 - Northern Pacific Engineering Drawing: General Plan/Abutment, Bridge 4.1 (7) - Madison River, West of Logan, Montana, 1904
- ItemBB014669 - Northern Pacific Engineering Drawing: Repair to East Abutment, Bridge 4.1 (7) - Madison River, West of Logan, Montana, undated
- ItemBB014670 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 4.1 (7) - Madison River, West of Logan, Montana, 1953
- ItemBB014671 - Northern Pacific Engineering Drawing: 160 Foot Through Span, Bridge 4.1 (7) - Madison River, West of Logan, Montana, undated
- 7302 more...