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
- 3071 more...
- ItemBB017613 - Northern Pacific Engineering Drawing: Shop Plan - Deck Girder Span, Bridge 93.3 - Ostrander Creek, South of Castle Rock, Washington, undated
- ItemBB017614 - Northern Pacific Engineering Drawing: Shop Plan - Deck Girder Span, Bridge 93.3 - Ostrander Creek, South of Castle Rock, Washington, undated
- ItemBB017615 - Northern Pacific Engineering Drawing: Shop Plan - Deck Girder Span, Bridge 93.3 - Ostrander Creek, South of Castle Rock, Washington, undated
- ItemBB017645 - Northern Pacific Engineering Drawing: Shop Plan - Details, Signal Bridge, Livingston, Montana, undated
- ItemBB017646 - Northern Pacific Engineering Drawing: General Plan, Bridge 0 - Clark Fork River, North of Phosphate, Montana, 1958
- ItemBB017647 - Northern Pacific Engineering Drawing: Timber Piers, Bridge 0 - Clark Fork River, North of Phosphate, Montana, undated
- ItemBB017648 - Northern Pacific Engineering Drawing: Bent 10 and 14, Bridge 0 - Clark Fork River, North of Phosphate, Montana, undated
- ItemBB017649 - Northern Pacific Engineering Drawing: Floor Beams and Stringer Details, Bridge 0 - Clark Fork River, North of Phosphate, Montana, undated
- ItemBB017650 - Northern Pacific Engineering Drawing: Lateral Bracing, Bridge 0 - Clark Fork River, North of Phosphate, Montana, undated
- 4648 more...