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
- 5080 more...
- ItemBB019982 - Northern Pacific Engineering Drawing: General Plan, Bridge 4 - Bitter Root River, West of Logan, Montana, 1964
- ItemBB019983 - Northern Pacific Engineering Drawing: Framing Plans, Bridge 4 - Bitter Root River, West of Logan, Montana, 1964
- ItemBB019984 - Northern Pacific Engineering Drawing: Bearings, Plate and Bill of Material, Bridge 4 - Bitter Root River, West of Logan, Montana, 1964
- ItemBB019985 - Northern Pacific Engineering Drawing: Falsework Details, Bridge 4 - Bitter Root River, West of Logan, Montana, 1964
- ItemBB019986 - Northern Pacific Engineering Drawing: Expansion Bearing/70 Foot Deck Plate Girder (DPG), Bridge 4 - Bitter Root River, West of Logan, Montana, undated
- ItemBB019987 - Northern Pacific Engineering Drawing: Shaft Detail/70 Foot Deck Plate Girder (DPG), Bridge 4 - Bitter Root River, West of Logan, Montana, undated
- 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
- 2639 more...