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 3003 - Maintenance Facilities
- 1305 more...
- ItemBB025000 - Northern Pacific Engineering Drawing: Repairs, Sand Tower, Delta, Washington, undated
- ItemBB025001 - Northern Pacific Engineering Drawing: Location Sketch Piping Plan, Sand Tower, Delta, Washington, undated
- ItemBB025002 - Northern Pacific Engineering Drawing: General Plan, Sand Tower, Delta, Washington, undated
- ItemBB025003 - Northern Pacific Engineering Drawing: Masonry Details, Sand Tower, Delta, Washington, undated
- ItemBB029550 - Northern Pacific Engineering Drawing: General Plan, Oil Tank King Street Coach Yard, Seattle, Washington, undated
- ItemBB029551 - Northern Pacific Engineering Drawing: Tank Details, Oil Tank King Street Coach Yard, Seattle, Washington, undated