Just below the Converse Basin I had spotted something on Google Earth. Parking alongside the road and taking a 5 minute hike downhill led me to this massive structure:
It's a massive log crib trestle used on a logging chute to skid logs to the Converse Mill. While only partial remains of the trestle survive, it appears that at one point it was about 500 feet long.
Fellow adventurer Larry Brickell give a scale to the structure. One of the reasons that Sanger Lumber failed was the vast amount of their cut that was used to prepare logging chutes (skid roads) to haul the logs to the mill. About half of the useable trees they cut down went in to logging chutes. Inexplicably, when they finished logging, they left much of this timber in place.
At the western end was this sequoia tree stump with the notches for spring boards still visible (loggers cut a notch for a board to stand on as they cut the tree down).
More later...