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
- 6520 more...
- ItemBB028482 - Northern Pacific Engineering Drawing: Floor Plan, Bridge 52 (54), West of Spire Rock, Montana, undated
- ItemBB028483 - Northern Pacific Engineering Drawing: Floor Plan, Bridge 52 (54), West of Spire Rock, Montana, undated
- ItemBB028484 - Northern Pacific Engineering Drawing: Concrete Blocks, Bridge 52 (54), West of Spire Rock, Montana, undated
- ItemBB028485 - Northern Pacific Engineering Drawing: Concrete Pedestals, Bridge 63 (81), West of Highview, Montana, undated
- ItemBB028486 - Northern Pacific Engineering Drawing: Details of Piers, Bridge 63 (81), West of Highview, Montana, undated
- ItemBB028487 - Northern Pacific Engineering Drawing: Detail of Abutment, Bridge 63 (81), West of Highview, Montana, undated
- ItemBB028488 - Northern Pacific Engineering Drawing: Repair to West Abutment, Bridge 63 (81), West of Highview, Montana, undated
- ItemBB028491 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 63 (81), West of Highview, Montana, 1949
- ItemBB028492 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 63 (81), West of Highview, Montana, 1949
- 1199 more...