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
- 2848 more...
- ItemBB017377 - Northern Pacific Engineering Drawing: Shop Plan - Vertical Post, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB017378 - Northern Pacific Engineering Drawing: Downstream Truss, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB017379 - Northern Pacific Engineering Drawing: General Masonry Plan, Bridge 36 - Cedar Creek, West of Oakville, Washington, 1918
- ItemBB017380 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 36 - Cedar Creek, West of Oakville, Washington, undated
- ItemBB017381 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 36 - Cedar Creek, West of Oakville, Washington, 1927
- ItemBB017382 - Northern Pacific Engineering Drawing: General Plan, Bridge 3.1, West of Logan, Montana, 1928
- ItemBB017383 - Northern Pacific Engineering Drawing: Reinforced Concrete Trestle, Bridge 12, West of Willow Creek, Montana, 1927
- ItemBB017384 - Northern Pacific Engineering Drawing: Reinforced Concrete Trestle, Bridge 13, West of Willow Creek, Montana, 1927
- ItemBB017385 - Northern Pacific Engineering Drawing: Reinforced Concrete Trestle, Bridge 36, West of Cardwell, Montana, 1929
- 4871 more...