2022-12-19_GENERAL DOCUMENTS - C1981010

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Fork Formation with a maximum production rate of 2.6 million tons per year. Trapper currently produces coal and will continue to produce coal in the future from the L Pit located on Federal Coal Lease C-079641. Future mining also will occur in the N Pit located partially within Federal Coal Lease C-07519. Coal is mined using dragline, truck and shovel and highwall augering methods. The coal is transported by haul truck to the Craig Generating Station located to the north of the mine. Trapper currently has no provisions to ship coal to other locations (OSMRE 2015a). 1.3 Coal Combustion The destination of the coal, once mined, is not under the jurisdiction of OSMRE. However, all of the coal produced at the Trapper Mine is sent to the Craig Generating Station in Craig, Colorado. Trapper coal supplies as much as 54 percent of the annual fuel for the Craig Generating Station. The Craig Generating Station is a coal burning power plant that was constructed between 1974 and 1984 (Units 1, 2, and 3 were completed in 1980, 1979, and 1984 respectively). It generates approximately 1,303 megawatts at peak capacity. Combustion of coal releases the following pollutants: sulfur dioxide,particulate matter,nitrogen oxides (NOx),mercury (Hg), selenium, and carbon dioxide. The Craig Generating Station, along with all coal fired power plants,has measures in place that reduce mercury and other emissions. Environmental control equipment at the station includes (OSMRE 2015b): • Wet limestone scrubbers on Units 1& 2 to remove sulfur dioxide. • Fabric filter"baghouse" on all Units to control particulate matter. • Dry limestone scrubber on Unit 3 to remove sulfur dioxide. • Low nitrogen oxide burners with over fire air on all three Units. • Mercury emission control on Unit 3, installed in 2014/2015. (Units 1 and 2 do not require mercury controls as they qualify as low emitters under the Environmental Protection Agency's (EPA)Mercury and Air Toxics Standards (MATS)rule for power plants.) Selective Catalytic Reduction (SCR) emission controls are also planned to be constructed on Units 1 and 2 for NOx reduction by 2018. While not specific to mercury,the SCRs will provide the additional benefit of capturing some mercury before it is emitted. However,the amount captured is not known. Selective Non-Catalytic Reduction is also planned to be installed on Unit 3 for NOx reduction by 2018. Of the contaminants listed above,mercury is of greatest concern for endangered fish,which is discussed further in the Effects of the Action section along with Selenium. The emissions information that follows here therefore pertains to mercury and selenium. 1.4 Conservation Measures Conservation measures are actions that will be taken by the Federal agency or applicant, and serve to minimize or compensate for, project effects on the species under review. Trapper plans to commit$45,000 for Colorado River endangered fish research and$10,000 for Colorado River 4