Ozark Cavefish National Wildlife Refuge, located twenty miles west of Springfield in Lawrence County, MO, was acquired in 1991 to protect a Federally endangered species, the Ozark cavefish. Turnback Creek Cave Spring is located on this property and is the outlet of an underground stream known to contain a population of the endangered Ozark cavefish. The forty-acre refuge is managed by staff at Mingo National Wildlife Refuge, in Puxico, MO.