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
- 5795 more...
- ItemBB020906 - Northern Pacific Engineering Drawing: Shop Plan - Cross Frame/Strut, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020907 - Northern Pacific Engineering Drawing: Shop Plan - Lateral, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020908 - Northern Pacific Engineering Drawing: Shop Plan - Cross Frame/Bolt, Bridge 92 - Clark Fork River, West of Colby, Montana, undated
- ItemBB020909 - Northern Pacific Engineering Drawing: General Plan, Bridge 0 - Esquatzel Coulee, West of Mesa, Washington, 1958
- ItemBB020910 - Northern Pacific Engineering Drawing: Substructure/Bridge Layout, Bridge 0 - Esquatzel Coulee, West of Mesa, Washington, undated
- ItemBB020911 - Northern Pacific Engineering Drawing: Abutment 6, Bridge 0 - Esquatzel Coulee, West of Mesa, Washington, undated
- ItemBB020912 - Northern Pacific Engineering Drawing: Piers 1 Through 5, Bridge 0 - Esquatzel Coulee, West of Mesa, Washington, undated
- ItemBB020913 - Northern Pacific Engineering Drawing: Timber Approach Trestle, Bridge 0 - Esquatzel Coulee, West of Mesa, Washington, undated
- ItemBB020914 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 0 - Esquatzel Coulee, West of Mesa, Washington, undated
- 1924 more...