2020-06-16_REVISION - C1981010 (17)

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TRAPPER MINING INC. P.O.Box 187 Craig, Colorado 81626 (970)824-4401 June 12, 2020 RECEIVED Ms. Robin Reilley JuN 16 2020 Environmental Protection Specialist O1 O RECLAWm�u Colorado Division of Reclamation, Mining and Safety q•AW,SAFET`if' 1313 Sherman Street, Room 215 Denver, CO 80203 Re: Trapper Mining Inc., Permit No. C-1981-010 Permit Revision PR-10. East I and J Pits Mine and Reclamation Plan Dear Ms. Reilley: Enclosed is a copy of a mine and reclamation plan for I and J Pits. The enclosed material includes text, tables and maps that present the proposed project plan. This includes 155.0 acres of new disturbance and 51.7 acres of re-disturbance of Phase III bond-released lands. The East I and J Pits area will consist primarily of highwall mining as pits are opened up to access the F and G2 coal seams,respectively. Following surface removal of coal seams, highwall mining will be to the north of the open pits. A small temporary out of pit spoil dump will be created with the first pit to be opened up. That temporary spoil will be used to fill in the final cut of the I and J Pits mining complex. Enclosed is a geotechnical report from Agapito Associates, Inc. that demonstrates the temporary pile will be stable beyond a safety factor of 1.5. Cross sections of that proposed spoil pile are also enclosed. A P.E. certified report entitled"Performance of the Trapper Mine No Name Sediment Control System During the Worst-Case Year of Development of I and J Pits"is enclosed in order to demonstrate that existing No Name ponds will be able to handle and treat runoff from new I and J Pits disturbance without any modification to the ponds. We intend to reclaim disturbed lands to Range Site C rangelands for livestock grazing and wildlife habitat. While some of the lands to be disturbed and reclaimed were previously cropland, the current use is for grazing and wildlife habitat, not only at Trapper but regionally. Trapper is presently working with representatives of the State Land Board to get approval for the land use change from cropland to rangeland.