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
- 4060 more...
- ItemBB018692 - Northern Pacific Engineering Drawing: Falsework Detail, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- ItemBB018693 - Northern Pacific Engineering Drawing: Temporary Girder Bearings, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- ItemBB018694 - Northern Pacific Engineering Drawing: Standard Plan 50 Foot Plate, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- ItemBB018695 - Northern Pacific Engineering Drawing: Standard Plan 50 Foot Plate, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- ItemBB018696 - Northern Pacific Engineering Drawing: Deck Plate 7 Designed Ledge, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- ItemBB018697 - Northern Pacific Engineering Drawing: Standard 30 Foot Beam Span, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- ItemBB018698 - Northern Pacific Engineering Drawing: Plans/Details, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- ItemBB018699 - Northern Pacific Engineering Drawing: Details, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- ItemBB018700 - Northern Pacific Engineering Drawing: Sketch of Base Casting, Bridge 128 - Salmon Creek, South of Ridgefield, Washington, undated
- 3659 more...