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 3007 - Track
- 28 more...
- ItemStruc006853 - Northern Pacific Engineering Drawing, Load Adjuster at Livingston, Montana, 1960
- ItemStruc006854 - Northern Pacific Engineering Drawing, Load Adjuster at Pasco, Washington, 1957
- ItemStruc006884 - Northern Pacific Engineering Drawing, Interlocking Tower at South Portal at Seattle, Washington, 1939
- ItemStruc007197 - Northern Pacific Engineering Drawing, Master Retarder at Pasco, Washington, 1970
- ItemStruc007198 - Northern Pacific Engineering Drawing, Master Retarder at Pasco, Washington, 1978
- ItemStruc007199 - Northern Pacific Engineering Drawing, Crest Office at Retarder Yard at Pasco, Washington, 1970
- ItemStruc007200 - Northern Pacific Engineering Drawing, Crest Office at Retarder Yard at Pasco, Washington, 1970
- ItemStruc007201 - Northern Pacific Engineering Drawing, Crest Office at Retarder Yard at Pasco, Washington, 1970
- ItemStruc007202 - Northern Pacific Engineering Drawing, Crest Office at Retarder Yard at Pasco, Washington, 1970
- 291 more...