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
- 5633 more...
- ItemBB020730 - Northern Pacific Engineering Drawing: Steel Spans 1/2/3, Bridge 150 - Petty Creek, Lothrop, Montana, undated
- ItemBB020731 - Northern Pacific Engineering Drawing: Shop Plan - Span Brace, Bridge 150 - Petty Creek, Lothrop, Montana, undated
- ItemBB020732 - Northern Pacific Engineering Drawing: Shop Plan - Detail Spans, Bridge 150 - Petty Creek, Lothrop, Montana, undated
- ItemBB020733 - Northern Pacific Engineering Drawing: Shop Plan - Span Brace, Bridge 150 - Petty Creek, Lothrop, Montana, undated
- ItemBB020747 - Northern Pacific Engineering Drawing: Rebuild Bridge/General Plan, Bridge 1.4 - 7th Avenue, South of Sunset Junction, Washington, 1951
- ItemBB020748 - Northern Pacific Engineering Drawing: Span/Anchor Bolt Layout, Bridge 1.4 - 7th Avenue, South of Sunset Junction, Washington, undated
- ItemBB020749 - Northern Pacific Engineering Drawing: 71 Foot Roadway Spans, Bridge 1.4 - 7th Avenue, South of Sunset Junction, Washington, undated
- ItemBB020750 - Northern Pacific Engineering Drawing: 27 Foot Tower Spans, Bridge 1.4 - 7th Avenue, South of Sunset Junction, Washington, undated
- ItemBB020751 - Northern Pacific Engineering Drawing: 51 Foot Approach Spans, Bridge 1.4 - 7th Avenue, South of Sunset Junction, Washington, undated
- 2086 more...