The tin Cup trail will be closed to the public Thursday and Friday (August 25 and 26). A helicopter will be flying over the canyon to deliver equipment to the Tin Cup Dam, which is undergoing repair.
The dam, 14 miles southwest of Darby, in the Selway-Bitterroot Wilderness, has embankment stability problems that could lead to failure if not repaired.
Helicopters will deliver cement to the dam on the two days. The helicopters were authorized to delivery a limited amount of heavy equipment to minimize damage to the trail and to help speed up the repair. The rest of the equipment will be hauled by horses or mules.
The dam was built in 1906 and is 25 feet high and over 400 feet long. It is operated by the Tin Cup County Water and Sewer District.