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J :; <br />III IIIIIIIIIIIIIIII <br />STATE OF COLORADO <br />DIVISION OF MINERALS ANO GEOLOGY <br />Depanmenl of Natural Kevrws ev <br />I }13 Sherman SL, Koum ! 15 <br />Denver, Colorado H0201 <br />Phone: 13071 866-7 567 <br />FA%: (3031 832-H I1I6 <br />~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />April lI, 1996 Coye n^er <br />lames S La hha~d <br />Mr. Steve Self Execurive Direcun <br />Eastside Coal Company m~cnae~ H. f,~~,; <br />P.O. Bob 17485 Division Duet mr <br />Ban Antonio, T% 78217-0485 <br />Re: Review of Annual Hydrology Report <br />Eastside Mine (C-84-063) <br />Dear Mr. Self: <br />The Division has reviewed the 1995 Annual Hydrology Report for the <br />Eastside Mine. The data submitted in the report appear to <br />substantiate the prediction of no significant impact to groundwater <br />or surface water presented in the Probable Hydrologic Consequences <br />section of the Eastside permit. Please address the following <br />comments and concerns in a letter to be received by the Division no <br />later than June 11, 1996: <br />1) On page 1 of the AHR, it is mentioned that the geotech <br />well was reclaimed in June of 1995. Therefore, <br />monitoring is no longer possible at this station. Please <br />submit a technical revision to the permit which <br />eliminates the geotech well from the list of required <br />monitoring stations. The technical revision should <br />include appropriate historical explanations in the text. <br />2) On page 2 of the AHR, it is stated that water pumped from <br />underground is sampled. In future AHR's, please clarify <br />that water is no longer being pumped from the mine, and <br />that in the event of a gravity discharge, the discharge <br />from the mine will be monitored. <br />3) Paqe 3 of the AHR discusses field and laboratory <br />conductivity values for the surface water sampling sites. <br />The numbers presented in the text do not appear to <br />correspond with the numbers presented in the tables at <br />the back of the report. Specifically: <br />a) The text references the December lab <br />conductivity for the Harvey Gap Outlet-Below <br />Mine as 859 (units?). However, the table, <br />entitled "Harvey Gap Outlet-Below Mine," does <br />