The state of Minnesota should have done a better job of managing the use of area wells to halt the draining in the last few years of White Bear Lake and its aquifer, a district judge ruled Wednesday.
In a ruling three months in the making that followed a trial held last spring, Ramsey County District Judge Margaret Marrinan said the state had violated the public trust as well as environmental laws in allowing excessive pumping of the Prairie du Chien aquifer, without really knowing what amount could be used without endangering its future availability.
The judge ordered the DNR to stop issuing permits for any more wells within a five-mile radius of White Bear Lake until it is certain the drawdowns are sustainable. She also ordered the agency to make sure pumping now allowed is sustainable, and to do so within a year.
Under her ruling, the state must ban residential irrigation when White Bear Lake falls below 923.5 feet above sea level and continue the ban until the lake rises to 924 feet.
The lake during the area's recent drought fell far below that level, reaching 918.5 feet in 2013. Heavy rain since has pushed it higher.
In a case that caps off a long career before she retires, Marrinan wrote that all existing permits must contain an enforceable plan to "phase down per capita residential water use to 75 gallons per day," and that all permits within five miles of the lake must be amended to include plans to move to "total or partial supply" from river sources.
The case has broad implications both for future suburban development and for the ability of property owners to irrigate lawns, once dry conditions return to what is now an amply rain-slogged metro area.
The Minnesota Department of Natural Resources (DNR) issued a brief statement saying that it was "surprised and deeply disappointed." An appeal was not ruled out.