HACKER VALLEY, W.Va. -- Holly River State Park is dark again.
Superintendent Ken McClintic says an underground cable failure has knocked out the park's electrical service.
Superstorm Sandy destroyed most of the park's aboveground power lines in October 2012. Those lines were rebuilt and the park reopened in April.
McClintic says the latest problem is a 2-mile stretch of underground electrical cable that has conductivity failure.
Division of Natural Resources district administrator Brad Reed says electricity could be restored July 31.
Guests who have reserved campsites and cabins have been notified of the outage. If they choose to keep their reservations, the park's staff will try to provide services.
The park is discouraging walk-ins or first-come, first-served camping until power is restored.
The park's office is using generator power and is open.