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
- 1098 more...
- ItemBB015389 - Northern Pacific Engineering Drawing: Plan of Slab Forms, Bridge 39 - Pacific Highway, South of East Olympia, Washington, undated
- ItemBB015399 - Northern Pacific Engineering Drawing: Replace Flume/Trestle, Bridge 41 - Flume, South of Sheridan, Montana, 1950
- ItemBB015402 - Northern Pacific Engineering Drawing: Detail of Girders, Bridge 36 (Spans from Longview, Portland and Northern Railway), West of Thompson Falls, Montana, undated
- ItemBB015407 - Northern Pacific Engineering Drawing: Erection Diagram/Tower Transverses, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015408 - Northern Pacific Engineering Drawing: Bascule Truss, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015409 - Northern Pacific Engineering Drawing: Counterweight Truss, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015410 - Northern Pacific Engineering Drawing: Operators House, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015411 - Northern Pacific Engineering Drawing: Shop Plan - Anchor Bolt, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- ItemBB015412 - Northern Pacific Engineering Drawing: Shop Plan - Machinery House, Bridge 36.8 - West Waterway, West Seattle, Washington, undated
- 6621 more...