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
- 4864 more...
- ItemBB019735 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 41 - Porter Creek, West of Oakville, Washington, 1948
- ItemBB019736 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 41 - Porter Creek, West of Oakville, Washington, 1938
- ItemBB019737 - Northern Pacific Engineering Drawing: Details/Plans, Bridge 30 - Mullen Road, South of Kyro, Washington, undated
- ItemBB019738 - Northern Pacific Engineering Drawing: Details/Plans, Bridge 30 - Mullen Road, South of Kyro, Washington, undated
- ItemBB019739 - Northern Pacific Engineering Drawing: Details/Plans, Bridge 30 - Mullen Road, South of Kyro, Washington, undated
- ItemBB019740 - Northern Pacific Engineering Drawing: Shop Plan - Erection Plan, Bridge 30 - Mullen Road, South of Kyro, Washington, 1907
- ItemBB019745 - Northern Pacific Engineering Drawing: Encasement of Bents, Bridge 4, West of Logan, Montana, 1960
- ItemBB019752 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 11.2 - Silver Bow Creek, North of Silver Bow, Montana, 1956
- ItemBB019753 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 35 - Creek, West of Elliston, Montana, 1961
- 2855 more...