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
- 1048 more...
- ItemBB015337 - Northern Pacific Engineering Drawing: Column Details, Bridge 23 - Chehalis River, West of Pe Ell, Washington, undated
- ItemBB015338 - Northern Pacific Engineering Drawing: Transverse Bracing, Bridge 23 - Chehalis River, West of Pe Ell, Washington, undated
- ItemBB015340 - Northern Pacific Engineering Drawing: Detail of Approach, Bridge 73 - Clark Fork River, West of Noxon, Montana, undated
- ItemBB015341 - Northern Pacific Engineering Drawing: General Elevation/Plan, Bridge 62 - Swamp Creek, West of Tuscor, Montana, 1955
- ItemBB015342 - Northern Pacific Engineering Drawing: Approved Fills/Protection, Bridge 62 - Swamp Creek, West of Tuscor, Montana, undated
- ItemBB015343 - Northern Pacific Engineering Drawing: Abutments 1/6, Bridge 62 - Swamp Creek, West of Tuscor, Montana, undated
- ItemBB015344 - Northern Pacific Engineering Drawing: Piers 2/3/4/5, Bridge 62 - Swamp Creek, West of Tuscor, Montana, undated
- ItemBB015345 - Northern Pacific Engineering Drawing: Superstructure/New Bearings, Bridge 62 - Swamp Creek, West of Tuscor, Montana, undated
- ItemBB015346 - Northern Pacific Engineering Drawing: Deck Detail, Bridge 62 - Swamp Creek, West of Tuscor, Montana, 1956
- 6671 more...