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
- 2879 more...
- ItemBB017409 - Northern Pacific Engineering Drawing: Concrete Box With Head Wall, Bridge 101.2 & Others, Washington, undated
- ItemBB017410 - Northern Pacific Engineering Drawing: Reinforcement Concrete Trestle, Bridge 16 - Cocolalla Creek, Cocolalla, Idaho, 1924
- ItemBB017411 - Northern Pacific Engineering Drawing: Reinforcement Concrete Trestle, Bridge 70, South of Ritzville, Washington, 1923
- ItemBB017412 - Northern Pacific Engineering Drawing: Reinforcement Concrete Trestle, Bridge 79, South of Paha, Washington, 1928
- ItemBB017413 - Northern Pacific Engineering Drawing: Channel Change, Bridge 79, South of Paha, Washington, undated
- ItemBB017414 - Northern Pacific Engineering Drawing: Retaining Wall - North Side, Bridge 79, South of Paha, Washington, undated
- ItemBB017415 - Northern Pacific Engineering Drawing: Rock Extraction Falsework, Bridge 79, South of Paha, Washington, undated
- ItemBB017416 - Northern Pacific Engineering Drawing: Reinforcement Concrete Trestle, Bridge 104, West of Cunningham, Washington, 1924
- ItemBB017417 - Northern Pacific Engineering Drawing: Reinforcement Concrete Trestle, Bridge 104.3, West of Cunningham, Washington, 1924
- 4840 more...