Warning: Thin Ice! An aeration system creating open water and thin ice will be operating on Mountain Lake Lake in Cottonwood County, Township 106, Range 34, Sections 28 to 33, from December 1 through March 30. ILAND Weather conditions may cause the areas of thin ice and open water to fluctuate greatly. Stay clear of the marked area! Thin Ice Open Water If there are questions concerning this aeration system, please call 507-427-2999. Warning: Thin Ice! An aeration system creating open water and thin ice will be operating on Mountain Lake Lake in Cottonwood County, Township 106, Range 34, Sections 28 to 33, from December 1 through March 30. ILAND Weather conditions may cause the areas of thin ice and open water to fluctuate greatly. Stay clear of the marked area! Thin Ice Open Water If there are questions concerning this aeration system, please call 507-427-2999.