Fox River Status Update
November 26, 2013
Below freezing temperatures have accumulated to over 50 degree freezing days. Frazile ice is forming in the Fox River. Discharges from Stratton Dam are 860 cfs. With flows below 1100 cfs threshold, no flooding of buildings is anticipated even if an ice jam would occur.
Winter drawdown is occurring. The stage of Fox Lake is 3.3 feet. Winter pool stage is 2.5 feet so the Chain of Lakes needs to be dropped an additional 0.8 feet to reach winter pool. Rainfall over November 16-18 increased flows on the Fox River which slowed down the winter drawdown. The Wisconsin portion of the watershed received higher rainfall amounts then the Illinois portion of the watershed. The stage on the Fox River at Stratton Dam tailwater is 1.9 feet.
Below freezing temperatures will continue thru Friday, November 29. High temperatures above freezing over the weekend should reduce the frazile ice creation in the Fox River.
Gate operations will remain constant over the weekend. Outflows from Stratton Dam will remain below the 1100 cfs , the threshold for ice jam flooding. The winter drawdown will continue on the Chain of Lakes.
Rita M. Lee, P.E., CFM
IDNR Office of Water Resources
1 Natural Resources Way
Springfield, IL 62702