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
- 392 more...
- ItemBB014634 - Northern Pacific Engineering Drawing: 28 Foot Steel Beam Span, Bridge 122A, West of Missoula, Montana, undated
- ItemBB014635 - Northern Pacific Engineering Drawing: Girder Plans, Bridge 26, West of Evaro, Montana, 1917
- ItemBB014636 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 26, West of Evaro, Montana, 1958
- ItemBB014637 - Northern Pacific Engineering Drawing: Plan Rising Bridge/Tie Plan, Bridge 26, West of Evaro, Montana, undated
- ItemBB014638 - Northern Pacific Engineering Drawing: 20 Foot Deck Plate Girder (DPG) Span, Bridge 26, West of Evaro, Montana, undated
- ItemBB014639 - Northern Pacific Engineering Drawing: Plan of Abutments, Bridge 14, West of Evaro, Montana, 1901
- ItemBB014640 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 14, West of Evaro, Montana, 1957
- ItemBB014641 - Northern Pacific Engineering Drawing: General Plan/Detail Piers, Bridge 19 (15) - Jefferson River, Sappington, Montana, 1904
- ItemBB014642 - Northern Pacific Engineering Drawing: Detail of Abutment, Bridge 19 (15) - Jefferson River, Sappington, Montana, undated
- 7327 more...