A project to drain the largest reservoir in Santa Clara County to repair its aging dam is bringing with it unwelcome guests, say neighbors who live nearby: wild pigs. When full, Anderson Reservoir is 7 miles long, forming a vast natural barrier between the remote Diablo Range and suburban neighborhoods along the lake’s western edge near the San Jose-Morgan Hill border. But after the reservoir was emptied in late 2020 for earthquake repairs on its aging dam, residents in the area say they have been invaded by relentless razorbacks that dig up lawns, rip up irrigation lines and cause other mayhem totaling tens of thousands of dollars in damage.