2 people rescued after falling from a cliff in Sluice Boxes State Park Belt Rural Volunteer Fire Department Two people rescued after falling off a cliff in Sluice Boxes State Park By: MTN News and last updated 2021-03-07 15:56:42-05 GREAT FALLS â Two people were rescued from Sluice Boxes State Park on Friday. Belt Rural Volunteer Fire Department was dispatched to the area for a report of a person who fell off a cliff. Malmstrom AFB Fire Department and Great Falls Airport Firefighters were requested for their technical rescue teams, and Belt Ambulance also responded, along with the Cascade County Sheriff's Office.