I can remember this from about 1950. It was the only power supply for the lake. The campground was privately owned but was operated for the public so it was stocked . About 1993, another party from Portland bought it with the understanding that the general public would still get to use it, it is the only access to the lake. Unfortunately right after the sale, the new owner sut it down for public use. That was about the last time I saw it, nobody is allowed in anymore.
That stream is the outlet for the lake and was a good spawning bed way back then.