Historic Hood River
Applying what we learned yesterday, we know the lower image shows the log flume from Rainy, North, or Black lake above the Green Point Mill. Each section is almost level, dimensions 3.9 feet by 5.35 feet. A section would end in a gate, followed by a drop to the next relatively level section. The rectangular basin would carry just enough water to float the logs as men walked on the catwalk helping them along to the next gate. They would then open the gate, letting the logs and the water carrying them drop down to the next level. The log flume extended about 5 miles.
I think this may be the final section of the log flume, with a steep final drop to the mill pond. If I am correct, this image and this image may show the same spot from a different perspective. I know the match isn’t perfect, but the flume was rebuilt on a regular basis so we may be seeing an evolution of design (or my theory could be wrong).
The upper image shows the lumber flume below Green Point. I don’t see a creek below the flume, but it could be hidden behind the planks or we could be crossing the divide between Ditch Creek and Phelps Creek. The lumber flume is 3.2 feet wide at the top, and 1.2 feet deep. It carried lumber 10 miles to the Ruthton mill. The grade varies with the terrain.
In 1917, when this report was prepared, the flume was not in operation, hence the dry cross sections.