George Trapotsis of Manchester said he went out into his yard to investigate a noise about 9:15 p.m. Friday and spotted the moose, which he said likely decided to charge his fence into the pool area because he was spooked by a light turned on by Trapotsis' wife Joyce, the New Hampshire Union Leader, Manchester, reported Monday.
Trapotsis said the moose fell through the pool cover and into the water. He said he and neighbor Leo Desrochers worked quickly to untangle the animal from the cover.
"Then he was as happy as he could be swimming around in the pool," Trapotsis said.
A Manchester police officer and state Fish and Game Conservation Officer Geoff Pushee arrived and the four men soon found they could not move the moose on their own.
The police officer called a local fire station for help and before long about a dozen men were using ropes attached to the moose's antlers to steer it out of the pool.
Pushee said the moose, a 600- to 700-pound bull, was "a little stubborn" after his exodus from the water, but the men eventually coaxed it to return to the wild.