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Coal Reserve Assessment and Database Development of the Danville and Springfield Coal Members in Indiana: Final Report

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dc.contributor.author Conolly, Carol L.
dc.contributor.author Rupp, John A.
dc.date.accessioned 2006-08-09T17:49:16Z
dc.date.available 2006-08-09T17:49:16Z
dc.date.issued 2001-01
dc.identifier.citation Conolly, Carol L. and Rupp, John A., 2001, Coal Reserve Assessment and Database Development of the Danville and Springfield Coal Members in Indiana: Final Report. Indiana Geological Survey Open-File Study 01-01, 52 p., 19 fig. en
dc.identifier.uri http://hdl.handle.net/2022/250
dc.description Indiana Geological Survey Open-File Study 2001-1 en
dc.description.abstract This study assesses the coal resources of the Danville and Springfield Coal Members (Dugger and Petersburg Formations, respectively) in Indiana and provides new estimates of the tonnage of coal in the following categories as of January 1, 2000: original resources in place, resources remaining after mining, identified resources, demonstrated reserve base, accessible reserve base, and estimated recoverable reserves. In addition, the sulfur, heat, and ash content of the Danville and Springfield Coals were mapped in order to allocate indicated reserves, demonstrated reserve base, accessible reserve base, and estimated recoverable reserves according to specified categories of sulfur, heat, and ash content. The resources and reserves categories are defined based upon criteria for minimum coal thickness, overburden thickness, and reliability category. Three reliability categories are used to express the relative degree of geologic assurance or reliability of the resource estimate based upon the density of coal thickness data points that are used to derive the resource estimate. The reliability categories are: measured (0-0.5 miles from the data point), indicated (0.5-2.0 miles), and inferred (2.0-4.0 miles). The geologic and land use factors which limit the mining of the Danville and Springfield Coal were identified through interviews with geologists and mining engineers from companies mining these coals in Indiana and Illinois. These factors were mapped and then applied to the tonnage of demonstrated reserve base in order to calculate the tonnage of accessible reserve base. Recovery-rate factors for surface and underground mining (80% and 50%, respectively) were estimated using proprietary mine recovery rate data from mines operating in the Danville and Springfield Coals during the 1980s and 1990s. Estimated recoverable reserves were calculated by multiplying the accessible reserve base by these recovery-rate factors. The tonnage of original identified resources of Danville and Springfield Coal in Indiana is calculated to be 18.8 billion short tons (tonnage by coal bed is also provided in this report). Of the 18.8 billion short tons, 1.8 billion short tons have been removed by mining or lost in the mining process, thus leaving 17.0 billion short tons of remaining Danville and Springfield resources. Of the remaining resources, 16.4 billion short tons are demonstrated reserve base. Technological and land use restrictions remove 9.2 billion short tons of demonstrated reserve base from potential mining, thus leaving 7.2 billion short tons (38.2% of the original resources or 42.3% of the remaining resources) of accessible reserve base. Of the 7.2 billion short tons of accessible reserve base, 0.9 billion short tons (4.7% of the original resources or 12.3% of the total accessible reserve base) are estimated to be recoverable by surface mining, while 3.1 billion short tons (16.4% of the original resources or 43% of the total accessible reserve base) are estimated to be recoverable by underground mining. en
dc.description.sponsorship United States Department of Energy, Energy Information Administration Agreement DE-FC01-99EI35489 en
dc.format.extent 4291706 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Indiana Geological Survey en
dc.relation.ispartofseries Open-File Study en
dc.relation.ispartofseries 01-01 en
dc.rights This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 94105, USA. en
dc.subject Energy Resources en
dc.subject Coal en
dc.subject Economic Geology en
dc.subject Coal Quality en
dc.subject Coal Reserves en
dc.subject Danville Coal Member en
dc.subject Springfield Coal Member en
dc.subject Dugger Formation en
dc.subject Petersburg Formation en
dc.subject Carbondale Group en
dc.subject Pennsylvanian en
dc.subject Indiana en
dc.title Coal Reserve Assessment and Database Development of the Danville and Springfield Coal Members in Indiana: Final Report en
dc.type Technical Report en


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