Yosemite Slough pond? I thought you would like to know that the pond has nothing to do with the state park around Yosemite Slough. The pond is part of Parcel E on the Hunters Point Naval Shipyard. Once you go beyond the fence you are on the shipyard and so federal property. I have a pass to be on some parts of the shipyard, I still get stopped by guards when the see me with a camera.
Venture onto the shipyard at your own risk.
Here is some info on Parcel E:
Alan S. Hopkins
San Francisco, CA