2018-09-07_REVISION - C1981010 (2)

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mining of the eastern expansion area. Stipulations 21 and 22 are still listed as Future status. Not all aspects of these stipulation have been provided to DRMS. As part of Stipulation 22, in relation to the geology in the eastern expansion area: (c) A geology description that updates Sections 2.7.2 and 2.7.3 of the Trapper Mine permit application package with the information required by Rule 2.04.6(2)(a) and (b). Within the PR8 review, TMI stated that: "Trapper is not requesting to mine the PR -7 area with this revision. The operator states that additional geologic information will be provided as a revision at the time the mining plan is submitted. A study of overburden characteristics has been conducted, and a new section added for the Overburden Geochemistry of the PR7 Expansion Area. Corehole data is provided and a map included. " PR 9 does not include additions to geologic information as stated in the stipulation above. 5. Please update Sections 2.7.2 and 2.7.3 of the Trapper Mine permit application package with the information required by Rule 2.04.6(2)(a) and (b). Trapper Response to Comment 5: Trapper is not requesting to mine coal within the PR -7 Permit Expansion Area. We are only requesting limited surface disturbance to lay highwalls back, to slope reclaimed highwalls and to potentially construct coal and overburden haulage roads. Trapper currently does not have the rights to mine east of the Federal Lease C-079641 boundary. Trapper reviewed the geologic information that was included in section 2.7.2, Overburden Characteristics. This information was updated and approved with the PR -8 baseline submittal. Section 2.7.3, Coal Characteristics, was also reviewed and we feel it is representative of the conditions expected on the eastern border of Federal Lease C-079641. A review of Section 2.7.1, Structural Geology, was completed as well and that section describes a far broader area than is included in the Trapper Permit Area. Trapper believes that the information included in the current permit adequately describes the field conditions to be found in this area. Rule: 2.04.7 (1) (3) (4) Hydrology Ground Water Hydrology descriptions and Mitigation of Impacts of Mining for the N -pit redisturbance area, are not adequately described as required by Rules 2.04.7(1)(b) and 2.05.6(3)(a) and (b). 6A. Please provide additional text specific to the N -pit. This should meet the requirements of the above stated rules and specifically address these rules in relation to anticipated drawdown due to pit dewatering, anticipated rebound of groundwater elevations, affects to surrounding wells and springs, ground water quality, and storage and recharge capacity. This is a redisturbed area, however the disturbance is going deeper than previously mined and will create a larger volume of disturbance and increased permeability.