Aeration of Crooked Lake will take place this winter by the city of Coon Rapids Public Works Department.
The city plans to use a mobile system which may be in operation at any time, according to Gregg Engle, city parks supervisor.
When the aeration system is in operation, areas of thin ice and open water will occur which will fluctuate a great deal.
The purpose is to improve water quality and increase oxygen levels to prevent the winterkill of game fish in the lake.
The city has obtained permits from the Minnesota Department of Natural Resources.