Landfills owned by the nation's two largest trash firms have sued the state over a push to burn as much garbage as possible, rather than burying it.
Four landfills serving the metro area, owned by Waste Management and Republic Services, filed suit in May against the Minnesota Pollution Control Agency (MPCA) alleging that it is misinterpreting a decades-old Minnesota law that prioritizes burning the metro area's garbage to generate energy.
The agency fined the landfills $20,000 each this spring for accepting garbage that could have been burned at a local incinerator. One plant in particular, owned by Great River Energy in Elk River, regularly receives far less trash than it can handle.
About 20 percent of the seven-county metro area's garbage was dumped in landfills in 2016, while 25 percent was burned to make energy. The remaining 55 percent was recycled or composted.
Waste-to-energy facilities generally pull recyclable materials from the trash and grind it up before sending it into a giant fire, sometimes at a different location. Hennepin County's downtown Minneapolis facility burns the waste whole and removes metals afterward. The resulting ash, which is sent to landfills, is about a tenth the volume of the original garbage.
Yet controlling the flow of garbage is no simple task, because haulers typically choose where to take their loads. A 2012 MPCA report said haulers decide where to travel based on facility prices — the fee to drop off a ton of trash — as well as distance and company preference.
The MPCA announced its intent to begin enforcing the 1980s law several years ago after the Legislature asked for a report on how to achieve compliance. Waste Management challenged the enforcement in 2013, arguing the agency hadn't followed the correct procedures, but lost its case at the Minnesota Court of Appeals.
The landfills have now asked the courts to toss the MPCA's penalties. They argue the law is being misinterpreted to primarily hold landfills accountable, and that compliance is impossible without overhauling communication between landfills, haulers, incinerators and other trash-related companies.