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
- 1991 more...
- ItemBB016430 - Northern Pacific Engineering Drawing: Tie Frame Plan/Bill of Material, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- ItemBB016432 - Northern Pacific Engineering Drawing: Stress Sheet, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- ItemBB016433 - Northern Pacific Engineering Drawing: Approved Span/Stress Sheet, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- ItemBB016434 - Northern Pacific Engineering Drawing: 160 Foot Span, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- ItemBB016435 - Northern Pacific Engineering Drawing: 160 Foot Span, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- ItemBB016436 - Northern Pacific Engineering Drawing: 160 Foot Span, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- ItemBB016437 - Northern Pacific Engineering Drawing: End/Intermediate Bracing, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- ItemBB016438 - Northern Pacific Engineering Drawing: Approach Spans, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- ItemBB016439 - Northern Pacific Engineering Drawing: Detail of Approach Spans, Bridge 207 - Clark Fork River, West of Donlan, Montana, undated
- 5728 more...