Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series002 - Chicago, Milwaukee, St. Paul, and Pacific Railroad Company
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3007 - Track
- ItemBB030007 - Milwaukee Road Engineering Drawing: Standard Reinforcement Arch Culvert, Culvert, Near Hyak, Washington, undated
- ItemBB030008 - Milwaukee Road Engineering Drawing: Reinforcement Arch Culvert, Near Hyak, Washington, undated
- ItemBB030009 - Milwaukee Road Engineering Drawing: Standard Reinforcement Arch Culvert, Near Hyak, Washington, undated
- ItemBB030758 - Milwaukee Road Engineering Drawing: Construction Notes and Detail, Culvert, Washington, undated
- ItemBB030759 - Milwaukee Road Engineering Drawing: 10 Foot Concrete Arch Culvert, Washington, undated
- 11 more...