On April 13, Headwaters Resources Inc., a Utah-based coal combustion residuals manufacturer and marketer, filed suit in the U.S. District Court for the District of Columbia seeking hard deadlines for the Environmental Protection Agency’s final coal ash regulations that will either define the coal combustion byproduct as hazardous or non-hazardous. Headwaters is seeking to have their petition consolidated with that of Earthjustice, filed on April 5.