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
- 5122 more...
- ItemBB020025 - Northern Pacific Engineering Drawing: Shop Plan - Under Crossing, Bridge 62 - Evergreen Road, Trentwood, Washington, undated
- ItemBB020026 - Northern Pacific Engineering Drawing: Shop Plan - Under Crossing, Bridge 62 - Evergreen Road, Trentwood, Washington, undated
- ItemBB020027 - Northern Pacific Engineering Drawing: Shop Plan - Under Crossing, Bridge 62 - Evergreen Road, Trentwood, Washington, undated
- ItemBB020038 - Northern Pacific Engineering Drawing: General Plan, Bridge 23.2 - Bitter Root River, South of Florence, Montana, 1943
- ItemBB020039 - Northern Pacific Engineering Drawing: Details - Piers 4 and 7, Bridge 23.2 - Bitter Root River, South of Florence, Montana, undated
- ItemBB020040 - Northern Pacific Engineering Drawing: Detail Pier Number 5, Bridge 23.2 - Bitter Root River, South of Florence, Montana, undated
- ItemBB020041 - Northern Pacific Engineering Drawing: Detail Pier Number 6, Bridge 23.2 - Bitter Root River, South of Florence, Montana, undated
- ItemBB020042 - Northern Pacific Engineering Drawing: Falsework Plan, Bridge 23.2 - Bitter Root River, South of Florence, Montana, undated
- ItemBB020043 - Northern Pacific Engineering Drawing: Repairs to Span, Bridge 23.2 - Bitter Root River, South of Florence, Montana, 1944
- 2597 more...