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
- 4895 more...
- ItemBB019787 - Northern Pacific Engineering Drawing: Proposed Bridge Westbound Crossing, Bridge 64 - Union Pacific Railroad, West of Irwin, Washington, undated
- ItemBB019788 - Northern Pacific Engineering Drawing: Detail Reinforcement Concrete Slab, Bridge 64 - Union Pacific Railroad, West of Irwin, Washington, undated
- ItemBB019789 - Northern Pacific Engineering Drawing: Detail Piers/Abutment, Bridge 64 - Union Pacific Railroad, West of Irwin, Washington, undated
- ItemBB019790 - Northern Pacific Engineering Drawing: Overhead Highway Bridge, Bridge 69 - Napa Street, Spokane, Washington, undated
- ItemBB019791 - Northern Pacific Engineering Drawing: General Plan/Abutment, Bridge 22.1 - Squire Creek, East of Oso, Washington, 1901
- ItemBB019792 - Northern Pacific Engineering Drawing: Detail of Steel, Bridge 22.1 - Squire Creek, East of Oso, Washington, undated
- ItemBB019793 - Northern Pacific Engineering Drawing: General Plan/Falsework, Bridge 22.1 - Squire Creek, East of Oso, Washington, 1929
- ItemBB019801 - Northern Pacific Engineering Drawing: General Plan, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, 1901
- ItemBB019802 - Northern Pacific Engineering Drawing: Center Pier, Bridge 39 - Umatilla River, Union Pacific Connection, Washington, undated
- 2824 more...