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<br />-6- <br />RIDER TO MINING PERMIT <br />Permit Date October 11 1983 <br /> <br />Permit No. C-0L2-81 <br />The following additional stipulations and conditions form an integral part of <br />the foregoing permit: <br />Stipulation No. 1 <br />THE SOMERSET MINE RECLAIMED AREAS SHALL ACHIEVE AT LEAST THREE COOL <br />SEASON PERENNIAL GRASSES AND ONE PERENNIAL FORE WITH RELATIVE COVER <br />EQUAL TO OR GREATER THAN THREE PERL'ENT. THE COMBIIJEU RELATIVE COVER <br />SHOULD NOT EXCEED 80 PERCENT AND NO ONE SPECIES SHOULD COMPRISE GREATER <br />THAN 60 PERCENT. <br />Stipulation No. 2 <br />THE OPERATOR SHALL MEASURE WOODY PLANT DENSITY AND VEGETATION COVER THE <br />FIRST AND THIRD GROWING SEASONS AT INTENSITIES EQUAL TO BASELINE <br />SAMPLING LEVELS. <br />Stipulation No. 3 <br />THE OPERATOR SHALL DELETE RUBBEP, RABBITBRUSH FROM THE PROPOSED <br />RECLAMATION SEED MIX. <br />Stipulation No. 4 <br />WITHIN 120 DAYS OF PERMIT ISSUANCE U.S. STEEL SHALL SUBh1IT A SUBSIDENCE <br />MONITORING MAP WHICH COMMITS TO THE INSTALLATION OF A CENTERLINE <br />SUBSIDENCE MONITORING MONUMENT ABOVE EACH ENTRY OF THE 5th WEST MAINS. <br />Stipulation No. 5 <br />U.S. STEEL SHALL SUBMIT A DEMONSTRATION THAT THE PROPOSED POST-MINING <br />CONTOURS OF ALL AREAS FOR WHICH THEY HAVE APPLIED FOR A VARIANCE FROM <br />THE APPROXIMATE ORIGINAL CONTOUR RESTORATION REQUIREMENTS, WILL BE <br />STABLE WITH A STATIC FACTOR OF SAFETY OF 1.3 WITHIN 120 DAYS AFTER <br />PERMIT ISSUANCE. <br />