The U.S. Environmental Protection Agency has proposed barring six coal-fired power plants in various states—a combined 11 GW—from disposing coal ash into unlined surface impoundments. The agency, however, also proposed to provide disposal extensions if the coal plants are needed to maintain grid reliability. The EPA’s proposed determinations, issued on Jan. 25, fall under its Coal Combustion Residuals (CCR) Part B final rule, which it […]