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
- 3131 more...
- ItemBB017702 - Northern Pacific Engineering Drawing: General Plan, Bridge 51 - Bitter Root River, Grantsdale, Montana, 1948
- ItemBB017703 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 51 - Bitter Root River, Grantsdale, Montana, undated
- ItemBB017704 - Northern Pacific Engineering Drawing: Detail of Piers 2 and 6, Bridge 51 - Bitter Root River, Grantsdale, Montana, undated
- ItemBB017705 - Northern Pacific Engineering Drawing: Detail of Pier 3, Bridge 51 - Bitter Root River, Grantsdale, Montana, undated
- ItemBB017706 - Northern Pacific Engineering Drawing: Detail of Piers 4 and 5, Bridge 51 - Bitter Root River, Grantsdale, Montana, undated
- ItemBB017707 - Northern Pacific Engineering Drawing: Erection Locations and Girder Elevation, Bridge 51 - Bitter Root River, Grantsdale, Montana, undated
- ItemBB017708 - Northern Pacific Engineering Drawing: Steel Details Internal Floor Beam, Bridge 51 - Bitter Root River, Grantsdale, Montana, undated
- ItemBB017709 - Northern Pacific Engineering Drawing: Steel Details, Bridge 51 - Bitter Root River, Grantsdale, Montana, undated
- ItemBB017710 - Northern Pacific Engineering Drawing: Stringer Details and Brackets, Bridge 51 - Bitter Root River, Grantsdale, Montana, undated
- 4588 more...