DENVER — The Environmental Protection Agency came under fire Thursday after an official said the agency would not fully cover a Colorado county’s expenses stemming from the EPA-caused toxic wastewater spill at the Gold King Mine. Colorado Republicans blasted the agency after the Durango Herald reported that an EPA official nixed some of La Plata County’s proposed cooperative agreement for $2.4 million in spill-related costs over 10 years at a Wednesday board of county commissioners meeting. Sen. Cory Gardner, Colorado Republican, described the report as “outrageous” and “yet another example of the Washington double standard,” adding that he would work...