Officials in Montpelier are stepping up efforts to break up an ice jam that has clogged the Winooski River.
The public works department plans to pump more than a million gallons of water a day into the river to try to thaw the ice.
The water from the city’s wastewater treatment plant is about 10 to 15 degrees warmer than the river.
The city also will spread sand and mulch on the river to try to thaw the ice.
Officials are concerned that when the ice upstream breaks in a spring thaw it will collect at the ice dam causing massive flooding similar to what occurred in 1992.