Sioux City Journal: Nebraska regulators and Big Ox Energy struck an agreement Monday to extend the decision date of whether or not the troubled South Sioux City biogas plant will be allowed to keep its state environmental permits. The agreement stipulated that Big Ox cease operations immediately. However, the Wisconsin-based company has 60 days — until Sept. 9 — to report any further issues pertaining to the site of energy production and to properly take care of environmental issues at the facility.