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<br />-6- <br />RIDER TO t•iINING PERiMIT <br />Permit Date October 11 <br />1983 <br />•'1~ III III III III IIII III <br />999 <br />JY?l ~ <br />Permit No. C-U22-81 <br />The following additional stipulations and conditions form an integral part of <br />the foreyoinq permit: <br />Stipulation <br />THE SOMERSET MINE RECLAIMED AREAS SHALL ACHIEVE AT LEAST THREE COOL <br />/~'1 SEASOtJ PERENNIAL GP,ASSES AND OtJE PERENNIAL FORB 4JITH RELATIVE COVER <br />~% EQUAL TO OR GREATER THAN THREE PERCENT. THE COMBINED RELATIVE COVER <br />SHOULD NOT EXCEED 80 PERCENT AND NO ONE SPECIES SHOULD COMPRISE GREATER <br />THAN 60 PERCENT. <br />Stipulation N <br />THE OPERATOR SHALL MEASURE WOODY PLANT DENSITY AND VEGETATION COVER ThIE <br />FIRST A(JD THIRD GROWIWG SEASOtJS AT INTENSITIES EQUAL TO BASELINE <br />SAMPLING LEVELS. <br />Stipulation <br />THE OPERATOR SHALL DELETE RUBBEP, RABBITBRUSH FROti THE PROPOSED <br />RECLAt•IATION SEED MIX. <br />Stipulation No. 4 <br />41ITHIN 120 DAYS OF PERt+~IT ISSUAtvCE U.S. STEEL SHALL SUBt•1IT A SUBSIDENCE <br />~( t•iONITORING h1AP WHICH COIIMITS TJ THE INSTALLATION OF A CENTERLINE <br />SUBSIDENCE F10NITORII;G P10NUh1ENT ABOVE EACH ENTRY OF THE 5th ~•JEST MAINS. <br />Stipulation No. 5 <br />U.S. STEEL SHALL SUB'~iT A DEMONSTRATION THAT THE PROPOSED POST-MIRING <br />CONTOURS OF ALL AREAS FOR WHICH THEY HAVE APPLIED FOR A VARIAhJCE FROM <br />THE AP PR OXI^IATE ORIGINAL CUNlOUR RESTORATION REQUIREFiEHTS, 41ILL BE <br />STABLE 'W'ITH A STATIC FACTOR OF SAFETY OF 1.3 v1ITHIN 120 DAYS AFTER <br />PERMIT ISSUAt;CE. <br />