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
- 555 more...
- ItemBB014811 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 3, West of Logan, Montana, 1951
- ItemBB014812 - Northern Pacific Engineering Drawing: Detail 29 Foot Steel Span, Bridge 3, West of Logan, Montana, undated
- ItemBB014813 - Northern Pacific Engineering Drawing: Detail Reinforcement Beam Span, Bridge 3, West of Logan, Montana, undated
- ItemBB014814 - Northern Pacific Engineering Drawing: Shop Plan - Erection/Braces, Bridge 3, West of Logan, Montana, undated
- ItemBB014815 - Northern Pacific Engineering Drawing: Masonry Plan, Bridge 1 - Skookumchuck River, West of Centralia, Washington, 1917
- ItemBB014817 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 1 - Skookumchuck River, West of Centralia, Washington, 1949
- ItemBB014818 - Northern Pacific Engineering Drawing: General/Masonry Plan, Bridge 26, West of Blossburg, Montana, 1918
- ItemBB014819 - Northern Pacific Engineering Drawing: Masonry as Constructed, Bridge 26, West of Blossburg, Montana, undated
- ItemBB014821 - Northern Pacific Engineering Drawing: Convert Deck Plate Girder (DPG) Account, Bridge 26, West of Blossburg, Montana, undated
- 7164 more...