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
- 4187 more...
- ItemBB018820 - Northern Pacific Engineering Drawing: Vertical Section Borings, Bridge 38 - Snohomish River, South of Snohomish, Washington, undated
- ItemBB018821 - Northern Pacific Engineering Drawing: General Plan, Bridge 64 (48) - Union Pacific Railroad, West of Irwin, Washington, undated
- ItemBB018822 - Northern Pacific Engineering Drawing: Proposed Bridge 2nd Crossing, Bridge 64 (48) - Union Pacific Railroad, West of Irwin, Washington, undated
- ItemBB018823 - Northern Pacific Engineering Drawing: Detail Reinforcement Concrete Slab, Bridge 64 (48) - Union Pacific Railroad, West of Irwin, Washington, undated
- ItemBB018824 - Northern Pacific Engineering Drawing: Detail Reinforcement Concrete Abutment, Bridge 64 (48) - Union Pacific Railroad, West of Irwin, Washington, undated
- ItemBB018825 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 25 - Nisqually River, South of Nisqually, Washington, undated
- ItemBB018826 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 25 - Nisqually River, South of Nisqually, Washington, undated
- ItemBB018827 - Northern Pacific Engineering Drawing: Shop Plan - Top Chord, Bridge 25 - Nisqually River, South of Nisqually, Washington, undated
- ItemBB018828 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam, Bridge 25 - Nisqually River, South of Nisqually, Washington, undated
- 3532 more...