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
- 2727 more...
- ItemBB017213 - Northern Pacific Engineering Drawing: General Plan, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB017214 - Northern Pacific Engineering Drawing: General Plan, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB017215 - Northern Pacific Engineering Drawing: General Plan, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB017216 - Northern Pacific Engineering Drawing: General Plan, Bridge 23.1 - Underpass, South of Ketron, Washington, undated
- ItemBB017217 - Northern Pacific Engineering Drawing: General Elevation, Bridge 36 - Clark Fork River, West of Thompson Falls, Montana, 1958
- ItemBB017218 - Northern Pacific Engineering Drawing: Slope Protection and Plan, Bridge 36 - Clark Fork River, West of Thompson Falls, Montana, undated
- ItemBB017219 - Northern Pacific Engineering Drawing: New Piers 3 and 7, Bridge 36 - Clark Fork River, West of Thompson Falls, Montana, undated
- ItemBB017220 - Northern Pacific Engineering Drawing: Bents 3 and 7, Bridge 36 - Clark Fork River, West of Thompson Falls, Montana, undated
- ItemBB017221 - Northern Pacific Engineering Drawing: Bents 4 and 6, Bridge 36 - Clark Fork River, West of Thompson Falls, Montana, undated
- 4992 more...