After years of opposition (including legal opposition from the Sierra Club), the Utah Supreme Court remanded the air permit first issued in 2004. As of 2010, the proposal is not active as a coal plant proposal, but natural gas may be considered. A natural gas facility has not been formally proposed. In 2008, voters approved a measure to require a public vote to amend zoning for a coal plant in the county. This coal plant would have an effect on visibility within Utah's five national parks. New power plant consisting of one circulating fluidized bed boiler with the following pollution controls: fabric filter baghouse, selective non-catalytic reduction (SNCR), dry lime scrubber with limestone injection, combustion controls (CO). : BACT Limits Proposed (lb/MMBtu):  PM10 (0.016 no ave), SO2 (0.022 annual ave based on 0.4% S in coal; 0.05 on short-term ave based on 0.9% S coal), NOx (0.10 no ave), CO (0.12 no ave), VOC (0.005 no ave)