I hiked around the reservoir coming in from the Gold Mine end to fish the far side (east) tribs one time. They’re on the nat repro but they looked AMD impacted and I didn’t catch anything. I don’t recall seeing any no fishing or no trespassing signs along the reservoir itself, but part of it was fenced off, possibly due to a very steep bank. It was probably 4 or 5 years ago when I was there.
FWIW, the “trail” around the reservoir isn’t much of a trail, especially on the north side...I think it was just the grade they used to move equipment around when building the reservoir and it hasn't been used or maintained since. The north bank of the reservoir is essentially in a boulder field...It was a ballbuster of a hike through that part. It was a fun exploring outing, but a one and done for me given the effort expended for the fishing quality encountered.