Authorities say two people were rescued from a disabled motor boat that was adrift near the brink of Niagara Falls.

The U.S. Coast Guard says Monday that its Buffalo station was notified by one of the boaters around 11 p.m. Sunday that their 18-foot boat hit a reef and was adrift near Goat Island, which lies between the American and Canadian falls.

The Coast Guard told the boaters to anchor. But the boat kept drifting until officials at the nearby hydropower plant lowered the level of the Niagara River. That grounded the boat about a half-mile from the top of the falls.

After an effort to rescue the boaters with a police helicopter failed. A New York State Park Police rescue boat was able to reach the grounded vessel and bring the Buffalo man and woman to shore.