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J. ~. STOVER & ASSOCI~ES <br />' 2768 COMPASS DRIVE, SUITE 101 <br />GRAND JUNCTION, COLORADO 81506 <br />PSONE: (303) 245-4101, FAX 242-7908 <br />MINE ENGINEERING <br />MINE RECLAMATION <br />September 16, 1992 <br />iii iiiiiiiiiiiii iii <br />ss9 <br />CIVIL ENGINEERING <br />CONSTRUCTION NANAGEMENT <br />S. S. Shuey R F ~ ~~~~~ <br />Mined Land Reclamation Division <br />1313 Sherman St., Room 215 <br />Denver, co so2o3 SEP 17 1992 <br />Re: Somerset Mining Company ' <br />Permit Revision PR-02, Adequacy Review MINERALS ~ "`~ <br />Permit C-81-022 <br />Dear Mr. Shuey: <br />The Division's letter to Somerset Mining Company dated August 25, <br />1992 transmitted its review and comments regarding Somerset's <br />initial adequacy review responses. Following are Somerset's <br />responses to the Division's additional questions and comments. <br />1) -8) No response required. <br />9) Page 2.05-46iii was revised to clarify the monitoring <br />requirements for the springs. <br />10) - 13) No response required. <br />14a - c) A detailed report, titled Water Communication Potential <br />From Overlying Workings at the Sanborn Creek Mine, was <br />submitted to the Division under separate cover. As a <br />result of the recommendations of this report, the mine <br />plans have been revised. Mining recovery under old <br />workings known to be flooded will be limited to 50$. <br />MSHA indicated to the Division that it would not approve <br />and mine plan that would retreat mine under flooded <br />workings. I do not believe that MSHA would consider a <br />mine plan with a recovery factor of 508 to be "retreat <br />mining". <br />Drill hole WSC DH12 located in the Hawksnest Mine was <br />determined to be dry. Map 5-044 shows the area of the <br />Hawksnest Mine that is "known to be dry" based on DH12 <br />monitoring. It is not known if the areas to the <br />northeast of this line are flooded but it is assumed they <br />are. Mining panels in the Sanborn Creek Mine (1st - 4th <br />West and 1st - 5th East) will be restricted to 508 <br />