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
- 6627 more...
- ItemBB028591 - Northern Pacific Engineering Drawing: Spur Gear Details, Bridge 3.2 (72.2) - Hoquiam River, Washington, undated
- ItemBB028592 - Northern Pacific Engineering Drawing: Special Coupling Ring, Bridge 3.2 (72.2) - Hoquiam River, Washington, undated
- ItemBB028593 - Northern Pacific Engineering Drawing: Jaw Clutch/Details, Bridge 3.2 (72.2) - Hoquiam River, Washington, undated
- ItemBB028594 - Northern Pacific Engineering Drawing: Special Bevel Gear, Bridge 3.2 (72.2) - Hoquiam River, Washington, undated
- ItemBB028595 - Northern Pacific Engineering Drawing: Detail of Longitudinal Brace, Bridge 52, West of Spire Rock, Montana, undated
- ItemBB028596 - Northern Pacific Engineering Drawing: Detail of Longitudinal Brace, Bridge 52, West of Spire Rock, Montana, undated
- ItemBB028597 - Northern Pacific Engineering Drawing: Detail of Plate Girder, Bridge 52, West of Spire Rock, Montana, undated
- ItemBB028598 - Northern Pacific Engineering Drawing: Detail of Plate Girder, Bridge 52, West of Spire Rock, Montana, undated
- ItemBB028599 - Northern Pacific Engineering Drawing: Detail of Plate Girder/Casting, Bridge 52, West of Spire Rock, Montana, undated
- 1092 more...