“I wonder how they even found out about this?”
Do you mean how did the cops find out or do you mean how the kids found the reservoir?
The cops patrol from Rt 9 on a regular basis; checking with pals at UMASS Amherst, Quabbin is a common party destination.
Guess I should have been clearer. I meant, how did the cops even find out, given the time and the huge area that would have to be watched. I did find the answer in the longer article, that the cop got lucky enough to pass by while the kids’ cars were parked at a gate, and that the kids just happened to come out while the cop was there checking the cars.