IN THE HILLS of the Hamptons, next to one of the most expensive golf clubs in the country, sits a big pit. It spans an area of just over 30 acres — about six city blocks — and drops more than 100 feet deep in some parts, with heaps of sand scattered throughout. Heavy machinery scoops that sand out of the ground, sifts it, and loads it onto trucks for sale. It’s a mine called Sand Land, and it operates much as it has for more than half a century.

It isn’t supposed to. New York’s highest court ruled more than six months ago that Sand Land’s permits were invalid, and regulators told the company to stop mining. The town slapped a stop work order at the entrance. The state Department of Environmental Conservation (dec) sent inspectors and issued violation notices. Sand Land kept digging.