Generation Clean Fuels accuses the tribe and its affiliate, Oneida Seven Generations Corp., of violating agreements to lease equipment and share profits.
Press-Gazette Media reports the dispute arises from an Oneida effort to build a plant that would convert common household trash into energy using a high-heat process known as pyrolysis or gasification. Because of environmental concerns, Ashwaubenon, Green Bay and residents of the Oneida reservation have all prevented the company from building the plant.
The suit is pending in Cook County Circuit Court in Chicago.
Oneida tribe spokesman Phil Wisneski says officials are aware of the suit but decline to comment on it.