At approximately 2045 Central time, the helicopter was destroyed when it impacted water following an in-flight collision with power lines while maneuvering near Cushing, Okla. The Commercial pilot and a passenger sustained fatal injuries; three passengers were seriously injured. Visual conditions prevailed. The flight had been chartered to provide sightseeing rides to guests at a birthday party. The wreckage was located in the middle of the Cimarron River in approximately four to five feet of water. The helicopter impacted and severed three power lines approximately 30 to 40 feet above the river.