The lined sanitary landfill in Crow Wing County will be able to handle 10 more years of waste under the current permitted capacity.
Douglas Morris, county solid waste coordinator, updated the county board recently on the three county landfills. He said the lined sanitary landfill, which mainly manages the county's leachate management system, has saved the county $1.02 million in the past six years. Leachate is the water or snow melt that goes through the garbage.
The county used to pay a company to ship the county's leachate off the site for about $250,000 per year.
Morris said the county is starting to benefit from the leachate recirculation. He said the landfill has seen a significant increase in its compaction, which means the county is using less airspace and is expanding its expected life of each cell.
"By expanding the operational life of Cell 2 we will be able to take in more revenue for the same amount of airspace," Morris said. "At the end of 2003, 16,600 cubic yards were available (in Cell 2), equivalent to two to three months worth of disposal."
This landfill has five cells and the county is currently using Cell 3.
Morris said the recirculation also has helped the county meet its drinking water standards for leachate, except with the amount of arsenic in the water. However, Morris said the county has one of the lowest amounts of arsenic in the water compared with other landfills in the United States.
The unlined sanitary landfill, which monitors the ground water quality shows a significant improvement of ground water quality in the vicinity of the site. More than 87 percent of the potential gas at the landfill was extracted in the last six years.
The demolition landfill saw an increase last year because of the demolition of the former Riverton school. Morris said the remaining capacity of the new Phase 2 area in the landfill should last about 18 years.
Morris said Phase 1 in this landfill will be covered this year. When the county covers this, Morris said three more bays to the resident tipping deck will be added for the self-haulers.
"This is needed to address the significant increase in self-haulers utilizing the service," said Morris.
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