Middleborough Gas and Electric Department provides utilities to 15,000 homes in Middleborough and Lakeville, and at the height of Nemo, about 80 percent of those customers were without electricity. “It was the worst damage I’ve seen here in 25 years,” said department spokeswoman Sandra Richter. “This area was in the bull’s eye.” She said Middleborough and Lakeville cover 110 square miles, meaning a lot of potential for tree damage. Crews from other municipal utility services in Massachusetts whose areas had not been as hard-hit arrived to help out, along with four crews from North Carolina. By Monday, all but 1,000 customers had their power back. Richter wasn’t predicting when those customers would go back on line, since they were scattered in more remote locations. Just what the storm will cost won’t be known for about two weeks, she said Monday.