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
- 7421 more...
- ItemBB034178 - Northern Pacific Engineering Drawing: Lift Span - Truss Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034179 - Northern Pacific Engineering Drawing: Lift Span - Truss Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034180 - Northern Pacific Engineering Drawing: Lift Span - Truss Details, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034181 - Northern Pacific Engineering Drawing: Lift Span - Lift Girder, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034182 - Northern Pacific Engineering Drawing: Lift Span - Lift Guard Modification, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034183 - Northern Pacific Engineering Drawing: Balance Weight Box, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034184 - Northern Pacific Engineering Drawing: Superstructure Plans, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034185 - Northern Pacific Engineering Drawing: Lift Span - Machine Detail, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- ItemBB034186 - Northern Pacific Engineering Drawing: Towers - Floor System Girder, Bridge 3 - Snake River, East of Ainsworth Junction, Washington, undated
- 298 more...