Plat Map of Northern Pacific facilities at Dayton, Washington, undated, Sheet Number 2, Line Segment 450, showing the Ainsworth Junction-Dayton line.

Plat Map of Northern Pacific facilities at Dayton, Washington, undated, Sheet Number 3, Line Segment 450, showing the Ainsworth Junction-Dayton line.

Plat Map of Northern Pacific facilities at Dayton, Washington, March 30, 1909, Sheet Number 1, Line Segment 450, showing the Ainsworth Junction-Dayton line.

Oregon Railroad and Navigation Company, (OR&N) a subsidiary of the Union Pacific Railroad, Motor Car number 1 at Dayton, Washington, undated. Photo by Jerry Swart, J.M. Fredrickson collection. Other Subject Classes: motor car.

Northern Pacific steam locomotive 1377 at Dayton, Washington, in October 1950. Number 1377, class S-4 built by Baldwin in 1902, is shown with caboose 1537. Photo by Don Roberts, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, bay window caboose