WISCONSIN — An environmental group alleged that a logging operation in the Chequamegon-Nicolet National Forest (CNNF) has violated its contract by clear cutting sections of the forest and working while the ground is unfrozen. The group called on the United States Forest Service’s (USFS) supervisor for the forest to immediately halt the operation. The timber sale is part of the larger Fourmile logging operation in the national forest. …The groups said they were worried the project was moving forward to maximize profit from selling the timber to pulp markets rather than weighing the value of mature and old growth forests in mitigating climate change. …In the timber sale contract, loggers are not allowed to operate when the ground is unfrozen. …Because of the state’s mild winter, there has not been much snow cover in the forest this year.