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
- 102 more...
- ItemBB019351 - Northern Pacific Engineering Drawing: Details, Culvert South of Empire, West of Empire, Washington, undated
- ItemBB019352 - Northern Pacific Engineering Drawing: Slab Cover Down Stream, Culvert South of Empire, West of Empire, Washington, undated
- ItemBB019353 - Northern Pacific Engineering Drawing: Proposed Retaining Wall, Culvert South of Empire, West of Empire, Washington, undated
- ItemBB019354 - Northern Pacific Engineering Drawing: Proposed Retaining Wall, Culvert South of Empire, West of Empire, Washington, undated
- ItemBB019355 - Northern Pacific Engineering Drawing: Extension of Culvert, Culvert South of Empire, West of Empire, Washington, undated
- ItemBB019741 - Northern Pacific Engineering Drawing: Extension Concrete Box, Culvert, Near Rapids, Montana, 1960
- ItemBB019742 - Northern Pacific Engineering Drawing: Extension Concrete Box, Culvert, Near Rapids, Montana, 1960
- ItemBB019743 - Northern Pacific Engineering Drawing: Extension Concrete Box, Culvert, Near Rapids, Montana, 1960
- ItemBB019744 - Northern Pacific Engineering Drawing: Irrigation Ditch Siphon, Syphon, Near Quebec, Montana, undated
- 217 more...