(CNN) When teacher and recreational caver Rick Haley set out to help map a cave on August 6, he had no idea he would end up staging a rescue mission -- let alone reuniting a lost dog with her owner.
Haley, along with a team of around 30 spelunkers, was mapping a cave north of Perryville, Missouri, as part of a project for the Cave Research Foundation. The cave is part of the Berome Moore cave system, Missouri's second largest cave system, measuring around 22 miles, he told CNN.
Haley, 66, who was involved in logistics and managing problems on the expedition, exited the cave to find another caver and an assistant fire chief from the local fire department.
"Glad you're here," the fire chief told Haley. "You can help us do a dog cave rescue."
Another group of parents and children visiting the cave for the day had encountered a dog deep in the cave before flagging Haley for help.