Central Maine Power is planning to install a second underwater electric cable to Islesboro to provide back-up service should the existing cable fail, said Gail Rice, the company spokeswoman.
The project, for which the utility is still seeking permits, is expected to cost between $1.5 million and $2 million, Rice said. In addition to providing "a redundant feed" to ensure continuous electric service, she said, the new cable will include fiber.