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
- 4717 more...
- ItemBB019539 - Northern Pacific Engineering Drawing: Shop Plan - Bill of Material, Bridge 32 - Union Pacific Railroad, Athol, Idaho, undated
- ItemBB019540 - Northern Pacific Engineering Drawing: General Plan, Bridge 12.1 - Black River, West of Grand Mound, Washington, 1917
- ItemBB019541 - Northern Pacific Engineering Drawing: Masonry Plan, Bridge 12.1 - Black River, West of Grand Mound, Washington, 1917
- ItemBB019542 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 12.1 - Black River, West of Grand Mound, Washington, 1949
- ItemBB019543 - Northern Pacific Engineering Drawing: Tie Dapping Plan, Bridge 12.1 - Black River, West of Grand Mound, Washington, undated
- ItemBB019544 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 12.1 - Black River, West of Grand Mound, Washington, 1919
- ItemBB019545 - Northern Pacific Engineering Drawing: Shop Plan - End Post, Bridge 12.1 - Black River, West of Grand Mound, Washington, undated
- ItemBB019546 - Northern Pacific Engineering Drawing: Shop Plan - Chord Section, Bridge 12.1 - Black River, West of Grand Mound, Washington, undated
- ItemBB019547 - Northern Pacific Engineering Drawing: Shop Plan - Strut, etc., Bridge 12.1 - Black River, West of Grand Mound, Washington, undated
- 3002 more...