 On another case of zebra mussels has turned up in a crowing county lake. This time it's Kimball Lake where the mussels were found on boat lifts that had been removed from the water at the end of the season. D&R invasive species staff surveyed the lake and found one additional zebra mussel on a boat lift out of the water several hundred feet north of the public access. Zebra mussels are an invasive species that can compete with native species for food and habitat, cut the feet of swimmers, reduce the performance of boat motors and cause expensive damage to water intake pipes. Zebra mussels have now been detected in at least 50 bodies of water in crowing county.