COAL_AVAILABILITY_DANVILLE_IN: Resources of the Danville Coal Member (Dugger Formation, Pennsylvanian System) in Indiana That Have Favorable Geologic and Land Use Characteristics for Mining (Indiana Geological Survey, Polygon Shapefile)

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Theme: geoscientificInformation

Description
Abstract
COAL_AVAILABILITY_DANVILLE_IN identifies those resources of the Danville Coal in Indiana that have
favorable geologic and land use characteristics for surface and underground mining, as well as
those which have unfavorable geologic and land use characteristics.  In addition,
COAL_AVAILABILITY_DANVILLE_IN describes the geology of the Danville Coal, including coal thickness,
coal depth, and stripping ratio.

The following criteria were used to identify Danville Coal resources with favorable characteristics
for surface mining:

1.  Overburden is less than 200 feet thick.

2.  Danville Coal is greater than 14 inches thick.

3.  The stripping ratio is less than 25:1, where stripping ratio is defined as the cubic yards of
overburden above the Danville Coal divided by tons of Danville Coal.

4.  The unconsolidated deposits which overly the Danville Coal are less than 60 feet thick.

5.  Danville Coal is not within 200 feet (horizontal distance) of underground mines.

6.  Danville Coal is not within an area having 8 or more oil wells per 40 acres.

7.  Danville Coal is not within 2,640 feet (horizontal distance) of cities.

8.  Danville Coal is not within 100 feet (horizontal distance) of State or Federal parks.

9.  Danville Coal is not within 100  feet (horizontal distance) of pipelines.

10.  Danville Coal is not within 100 feet (horizontal distance) of railroads.

11.  Danville Coal is not within 100 feet (horizontal distance) of paved roads.

12.  In areas where the Danville Coal is less than 50 feet deep, a contiguous area of Danville Coal
contains more than 175,000 raw tons of coal.

13.  In areas where the Danville Coal is greater than 50 feet deep, a contiguous area of Danville
Coal contains more than 590,000 raw tons of coal.

The following criteria were used to identify Danville Coal resources with favorable characteristics
for underground mining:

1.  Overburden is greater than 100 feet thick.

2.  Danville Coal is greater than 42 inches thick.

3.  The thickness of bedrock overlying the Danville Coal is greater than 75 feet thick.

4.  Where the Danville Coal is greater than 150 feet deep, the ratio of the thickness of bedrock to
the thickness of unconsolidated deposits overlying the Danville Coal is greater than 1:1.

5.  Danville Coal is not within 200 feet (horizontal distance) of underground mines.

6.  Danville Coal is not within 800 feet (horizontal distance) of geologic faults which offset the coal.

7.  Danville Coal is not within an area having 8 or more oil wells per 40 acres.

8.  Danville Coal is not within 100 feet (horizontal distance) of cities.

9.  Danville Coal is not within 100 feet (horizontal distance) of State or Federal parks.

10. Danville Coal is not within 100 feet (horizontal distance) of an interstate highway.

11. A contiguous area of Danville Coal contains more than 80 million tons of raw coal.

Purpose
COAL_AVAILABILITY_DANVILLE_IN is a modified version of an ESRI ArcInfo polygon coverage that was created as a necessary
component of a USGS-sponsored Coal Availability study to assess the resources of the Danville Coal in
Indiana, and to identify those resources that have the most favorable geologic and land use
characteristics for mining. The results of this study include county-based tabular reports of the
tonnage of original Danville Coal resources in place, remaining resources after mining, resources
unlikely to be mined due to geologic and land use factors, and Danville Coal resources that are
deemed "available" (i.e., favorable) for mining according to the criteria of this study.

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