Zebra mussels found in Crystal Lake 6/25/2019 12:49:00 PM View Count 3082 The Iowa Department of Natural Resources (DNR) is closely monitoring Crystal Lake for zebra mussels after recent discoveries of juveniles in a water sample and two individuals on a sampling plate used to monitor for zebra mussels. No adult zebra mussels were found during a follow-up survey.
Management planned for Eurasian watermilfoil found at Crystal Lake 4/23/2019 3:12:00 PM View Count 2176 Crystal Lake, Iowa – The Iowa Department of Natural Resources (DNR) confirmed last fall that Eurasian watermilfoil was growing again in Crystal Lake, located seven miles west of Forest City in Hancock County.