I expected to find a dilapidated former mill. Instead, I found it open and staffed by a helpful guide.
“How many people will visit today?”
“Yes, that would include you.”
I’ll crib off the Wikipedia page and tell you that the mill was build in 1879. A series of canals divert Yakima River water to turn the grinding wheels. In 1907 a steam generator was added which furnished electricity to launder clothes two mornings a week and light homes a few hours each evening.
In 1977 the mill was added to the National Register of Historic Places.
Photos are slightly edited jpegs (Classic Chrome) from a Fuji x100f.