There is a "turtle sanctuary" just north of there that I think is included in the park. I wasn't aware you couldn't fish it, definitely not posted anywhere, I walked almost the whole perimeter
So far the consensus on Facebook, is that it is owned by the railroad company and is definitely fishable
maxwyatt
I would be hesitant to consume fish from ponds that close to the railroad yards. There has been documented well contamination in the Trainsong neighborhood near the tracks.