This chart, compares the change in yearly water levels since 2010. Use the drop down date filter to see all available years. The annual baseline is the highest spring lake level, which varies year-to-year. Many factors affect the level of Miller Lake - spring run-off, precipitation, evaporation, natural springs in the lake bed, inflow from Britain Lake, outflow at the southwest end. Please note, a large year-over-year decrease can be caused by a higher spring baseline.