Q841. What factors influenced the trend in emissions for underground coal mines?
A841. Reported emissions from the Underground Coal Mines sector decreased from 41 MMT CO2e in 2011 to 37 MMT CO2e in 2017, a decline of 9.7 percent. The declining trend in emissions is attributed to a nationwide decrease in coal production combined with the idling or closure of several large, gassy underground mines. Also, emissions at some mines increased where low natural gas prices resulted in venting of coal mine methane rather than processing and selling the gas into natural gas pipelines. During this period, the number of reporters decreased from 117 in 2011 to 77 in 2017. The decrease in the number of reporters is largely due to the closure of several mines but is also attributed to 2016 amendments in Part 98 allowing underground coal mines to cease reporting at abandonment rather than reporting for up to three years following abandonment.
Source: Brian Cook, (email - 9/18/2017), updated per K. Chiu 10/10/18
Approval / Publishing History: Version 1, Version 2 10/16/18
Relevant Subpart/Component: GHG Data and Publication
History Panel For Internal Use - Not Visible to the Public