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
- 5086 more...
- ItemBB019988 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 4 - Bitter Root River, West of Logan, Montana, 1964
- ItemBB019989 - Northern Pacific Engineering Drawing: Truss, Built List, Bridge 4 - Bitter Root River, West of Logan, Montana, 1964
- ItemBB019990 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 179 - Trout Creek, West of Westfall, Montana, undated
- ItemBB019991 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 179 - Trout Creek, West of Westfall, Montana, undated
- ItemBB019992 - Northern Pacific Engineering Drawing: Bracing and Reinforcement/Girders, Bridge 179 - Trout Creek, West of Westfall, Montana, undated
- ItemBB019993 - Northern Pacific Engineering Drawing: Bracing and Reinforcement/Girders, Bridge 179 - Trout Creek, West of Westfall, Montana, undated
- ItemBB019994 - Northern Pacific Engineering Drawing: Detail/Bent/Pier 2, Bridge 179 - Trout Creek, West of Westfall, Montana, undated
- ItemBB019995 - Northern Pacific Engineering Drawing: Bracing and Reinforcement/Girders, Bridge 179 - Trout Creek, West of Westfall, Montana, undated
- ItemBB019996 - Northern Pacific Engineering Drawing: Details/Pier Number 3, Bridge 179 - Trout Creek, West of Westfall, Montana, undated
- 2633 more...