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
- 444 more...
- ItemBB014690 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 143 (186), West of Lombard, Montana, 1958
- ItemBB014691 - Northern Pacific Engineering Drawing: Shop Plan - Shoe/Roller, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB014692 - Northern Pacific Engineering Drawing: Shop Plan - Post/Chord, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB014693 - Northern Pacific Engineering Drawing: Shop Plan - Chord/Post, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB014694 - Northern Pacific Engineering Drawing: Shop Plan - Post/Diagonal, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB014695 - Northern Pacific Engineering Drawing: Shop Plan - Portal/Strut, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB014696 - Northern Pacific Engineering Drawing: Shop Plan - Top Brace, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB014697 - Northern Pacific Engineering Drawing: Shop Plan - Bottom Brace, Bridge 6 - Chehalis River, Milburn, Washington, undated
- ItemBB014698 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam/Stringer, Bridge 6 - Chehalis River, Milburn, Washington, undated
- 7275 more...