Analysis of operational plan for Lake Chippewa near Winter, Wisconsin

Historical inflows into Lake Chippewa for 39 years of record were analyzed to determine the possibility of operating the flowage within a 2-foot (0.6-metre) range of stage while maintaining a minimum discharge of 57 cubic feet per second (1.6 cubic metres per second) and limiting the maximum discharge to 7,000 cubic feet per second (200 cubic metres per second). This proposed operating plan could be followed successfully most of the time. Some periods of low flow, mainly in winter, would require drawdowns below the minimum stage to maintain minimum discharge. Occasional large floods occurring about once in 5 years would require surcharges over the maximum stage to limit the maximum discharge. The flowage could be filled from minimum to maximum stage withing 45 days (frequently fewer) starting from April 1.