2015-01-26_PERMIT FILE - C1981012 ‎(8)‎

• Permit No: C1981012
• IBM Index Class Name: Permit File
• Doc Date: 1/26/2015
• Section_Exhibit Name: Section 3.0 Performance Bond Requirements
• Media Type: D
• Archive: No

to cover the cost of reestablishing revegetation at any time during the period specified
for permittee responsibility for revegetation described in 3.02.3.
Reclamation Cost Estimate Assumptions
The Division uses the in -house CIRCES software program to calculate the reclamation
cost estimate (RCE) for coal mining operations. Numerous basic assumptions are used
in addition to a wide variety of site - specific details taken from, but not limited to, the
approved permit application, the CAT handbook, the Inactive Mines Program, accepted
published sources, and operator - provided information.
Operator skill NECC believes that a 0.9 factor for the operator skill level is warranted
when coupled with the job efficiency rating of .83, resulting in a combined correction
factor of .747.
Material Consistency NECC understands that the correction factor for material
constituency is less than 1.0 when the material is in a bank or compacted state.
However, when the ripper utilization is 50% or greater, a material consistency of 1.0 or
greater is appropriate.
Material Density The CIRCES cost estimating program used by the Division includes a
variety of material density for earth materials at both mineral and coal mining
operations. Given the variety of materials, the variation of mining sites around the
state, and the number of selections available to the cost estimator, NECC believes that
site - specific information is the most representative of material density at the New Elk
mine site.
NECC's representatives measured material density on -site on January 10, 2013.
Sampling methodology consisted of filling a five - gallon bucket with the representative
material, carefully leveling the top, and weighing with a hand -held digital scale. The five
gallon bucket, when filled to the very top of the bucket, actually holds six gallons in
volume, confirmed by adding measured volumes of water until the bucket was full to
the brim. Material moisture levels in all materials weighed on that day were optimum
with no observation of excessive moisture and with only small clumping of soil material
when balled, indicating average to below average material moisture. Generally,
moisture levels appeared similar to what would be expected during reclamation
operations in favorable weather conditions. Two methods were used to determine the
material density in pounds per cubic yard.
Density Calculation Method One
The conversion formula used in Density Calculation Method One to convert a measured
material volume to Ibs /cubic yard is as follows;
(measured bucket weight in Ibs /6 gals)(7.49 gals /cu.ft.)(27 cu.ft. /cu.yd) = Ibs /cu.yd
Section 3.0 TR -68 9/29/2014