Unfortunately lionjack, the gravel pits fall under federal mining act laws. At least that was what I was told by an owner of one. There are some pretty strict laws on the use of that type of land according to him, which includes no general public access. I to wish they could open them up for recreational use, not only fishing or swimming, but they are a great place to ride atvs also.
It's been very interesting reading these posts, most of them are from an era before I was born, but some have been about things I do remember. Bigbrother is right about the quonset hut/Yamaha dealer, it was next door to the station, spent a few dollars in there talking to old Willie, I believe his name was. He used to ride around town once in a while with his little dog riding on the gas tank if I remember correctly.