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Mountain Coal Company, LLC <br /> est Elk ine <br /> �- Mountain Coal Company 5174 Highway 133 <br /> Somerset,CO 81434 <br /> June 30, 2019 Kathleen G.Welt <br /> Environmental Engineer III <br /> kweltParchcoal.com <br /> Mr. Leigh D. Simmons phone: �® <br /> Colorado Division of Reclamation, Mining and Safety R. _'t <br /> Office of Mined Land Reclamation23 2019 <br /> 1313 Sherman Street, Room 215 JUL <br /> Denver, Colorado 80203 RECLAMATION <br /> MINING AND SAFETY' <br /> Re: Mountain Coal Company, LLC, West Elk Mine; Permit No. C-1980-007; <br /> Water Year 2018 Annual Hydrology Report <br /> Dear Mr. Simmons: <br /> Attached is a technical memo for the 2018 Annual Hydrology Report (AHR) prepared by <br /> HydroGeology Solutions, Inc. (formerly HydroGeo) for Mountain Coal Company, LLC <br /> (MCC) that provides a summary of the water year 2018 (WY2018) water quality and <br /> quantity data, assessments of mine-induced hydrology impacts, along with a summary <br /> of MCC's current monitoring program. As has been done the past few years, MCC has <br /> reduced the bulk of the report by eliminating repeated general discussions that have <br /> been included in past AHRs and have also referenced information in those AHRs if that <br /> information has not changed during the past year, rather than providing a duplicate copy <br /> this year. As there were no new significant water inflows within the E seam, please <br /> reference the mine map in past AHRs. The location of monitored resources can be <br /> found on Permit Map 34. <br /> MCC pumped about 270 acre feet of its adjudicated water right from the North Fork of <br /> the Gunnison River for mine uses, including domestic water, surface dust control and <br /> for the underground mine operations — the largest water use. Most of the water pumped <br /> in the mine is absorbed in the mined coal and gob, is evaporated in the mine ventilation <br /> air and seeps into the mine floor. Along with domestic water and road dust control <br /> uses, water is used on the surface in the coal preparation plant. MCC was again <br /> successful during WY2018 with maintaining zero discharges (i.e. no CDPS discharges <br /> from the mine site) and continued to recycle water from the ponds for use in the Coal <br /> Preparation Plant. As a result, it is estimated that less than 50 acre feet were <br /> consumed by the mine operations during WY 2018. <br /> Please don't hesitate to contact me at (970) 929-2238 or by e-mail should you have <br /> questions regarding this submittal. <br /> Sincerely, <br /> \ Z�4 <br /> Kathleen G. Welt, <br /> Environmental Engineer III <br /> CC' Dan Gray - USFS <br /> John Poulos - MCC <br />