US Steel has shut down operations at its Midwest Plant in Portage in Indiana US as a precaution after experiencing an upset condition with the finishing line wastewater treatment plant. The plant operations will remain down until the condition is stabilized. US Steel said “This upset is currently believed to be the cause of the discoloured water seen coming from one of our outfalls. Early indications show higher than normal suspended solids in the water, and we are conducting additional sampling and an investigation to determine the cause. US Steel made all appropriate notifications to regulatory agencies and some officials have been onsite, including the US Environmental Protection Agency, the Indiana Department of Environmental Management, the US Coast Guard and Porter County. We will continue to work with regulators and the community and will provide additional updates as they become available.”US Steel Midwest plant is said to be spewing an orange substance, which in turn pollutes a Lake Michigan tributary, after travelling along Burns Waterway. According to Portage Mayor Sue Lynch, the substance started to appear in the water near the plant’s outfall, which was reported as early as 5.50 PM. This has later spread into the open area. The Indiana Department of Environmental Management has been notified about the incidentIn response to the event, the Indiana Dunes National Park has closed Portage Lakefront, Riverwalk and all of its beaches until further notice, as a safety precaution. In addition, the Indiana American Water too has decided to shut down its Ogden Dunes treatment facility Sunday night, until it receives confirmation of zero-threat to its water resources from additional water sampling tests.The apparent spill at the US Steel Midwest plant comes weeks after a federal judge approved a revised settlement with the company, more than four years after the Portage plant discharged wastewater containing a potentially carcinogenic chemical into the Burns Waterway. Two weeks back, the US District Court for the Northern District of Indiana had approved the revised consent decree requiring the company to address violations by undertaking substantial remedial measures at its Portage facility. US Steel has paid around USD 3 million during recent years, for wastewater permit violations.