Bitter cold weather in southern Oregon appears to have defeated a persistent blue-green algae bloom at Lost Creek Lake - the largest body of water in Jackson County.
According to the U.S. Army Corps of Engineers, vast mats seen as recently as two weeks ago near the Lost Creek dam spillway have all but vanished.
Water samples were taken Monday for analysis of algae levels and the presence of toxins associated with them. If the tests reveal levels below Oregon's public-health thresholds, the 98-day volunteer advisory against water contact could be lifted.
The Mail Tribune reports (http://is.gd/NYMlhd ) this is the sixth consecutive year that a fall bloom of blue-green algae has led to an advisory. Each started in September and most have stretched well into January.