Lake Levels Report.pdf

Lake levels in Minnesota fluctuate due to precipitation, outlet conditions, beaver dams, groundwater movement, and watershed characteristics. The DNR Waters Lake Level Minnesota program monitors lake levels with the help of citizen volunteers and cooperating organizations, collecting data from nearly 1000 sites in 2000. The data is used to calibrate hydrologic and hydraulic computer models, inform watershed management plans, and locate building and sewage treatment sites. Lake levels typically fluctuate 1-2 feet annually, with a statewide average fluctuation of 1.24 feet in 1999 and 1.05 feet in 2000. The data is available on the DNR website through the "Lake Finder" feature, which provides access to lake surveys, maps, water quality data, and fish consumption advisories. Many lakes experienced their highest recorded levels in 1999, and landlocked lakes can indicate local groundwater levels and movement. Ten-year trends show above-average levels in response to above-average precipitation, with geographical differences in precipitation affecting lake levels in different parts of the state.