GORHAM, N.H. (AP) — Leaking at the Gorham Dam prompted the National Weather Service to issue flash flood warnings for communities downstream of the dam.

Chad Miller, director of emergency management in Gorham, says the dam’s owner, Brookfield Renewable Power, reported a potential failure after divers discovered “significant structural issues.” The company is drawing water down to make repairs.

He says crews are going door-to-door to notify people in low-lying areas.

Steve Doyon, administrator of the state dam safety and inspection office, says the dam on the Androscoggin River has not failed. It’s classified as a low-hazard dam, which means it is unlikely to affect people if it did fail.

The flash flood warnings expire at 6 p.m.

Gorham is on the northern edge of the White Mountains.