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
- 1370 more...
- ItemBB015700 - Northern Pacific Engineering Drawing: Shop Plan - Undercrossing, Bridge 17 - Highway, South of Woodinville, Washington, undated
- ItemBB015701 - Northern Pacific Engineering Drawing: General Plan, Bridge 233 - Prickly Pear Creek, East Helena, Montana, 1928
- ItemBB015702 - Northern Pacific Engineering Drawing: Steel Details, Bridge 233 - Prickly Pear Creek, East Helena, Montana, undated
- ItemBB015703 - Northern Pacific Engineering Drawing: Detail of Abutment/Piers, Bridge 233 - Prickly Pear Creek, East Helena, Montana, undated
- ItemBB015704 - Northern Pacific Engineering Drawing: Replace Timber Pile, Bridge 40, Deer Lodge, Montana, 1930
- ItemBB015705 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 40, Deer Lodge, Montana, 1964
- ItemBB015706 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 40, Deer Lodge, Montana, undated
- ItemBB015707 - Northern Pacific Engineering Drawing: Shop Plan - Girders, Bridge 40, Deer Lodge, Montana, undated
- ItemBB015708 - Northern Pacific Engineering Drawing: Shop Plan - Floor Beam, etc., Bridge 40, Deer Lodge, Montana, undated
- 6349 more...