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CASE NUMBER 8 <br />6550— <br />ea <br />6450— <br />CASE NUMBER <br />DEWATERING SYSTEM <br />LEFT IN PLACE <br />DEGREE OF <br />COMPACTION <br />UPSLOPE RETAINING WALL <br />LEFT IN PLACE <br />MINIMUM FACTOR <br />OF SAFETY <br />8' <br />NO <br />85% <br />NO <br />0.818 <br />EXH IB I T No. 4 <br />STABILITY ANALYSES -ABOVE PORTALTURNOUT <br />6400- ACCESS ROAD STATION 65+00 <br />(NO DEWATERING ) <br />SCALE: I" = 50' <br />6350— 50' Or 50' 100 <br />I I I I I I I I <br />0 50' 100' 150' 200' 250' 300' 350' <br />Permit Number <br />Class []Permit tL 11,/ <br />Section /Exhibit'. _._.__._._. <br />Class: Revision <br />Type /Seq: _ ________ ----- <br />Class: O Report O Hydro OGeneral <br />Doc Type: <br />OApplication (Coal only) ❑Bond ❑Enforcement ❑ Inspection <br />4i <br />FILL ZONE <br />1 1 <br />400' 450' <br />scale: <br />drawn <br />checked <br />approved <br />DRY <br />SOIL <br />IONS <br />I 1 1 <br />500 550' 600' <br />IIIIII VIII VIII VIII VIII VIII III IIII <br />1" = 50' merrick and company <br />J. P. ® enpineers and architects <br />D.A.F. P.O. box 2 026 tole (303) 751 -0741 <br />10855 east bethany drive - denver,colorado 80222 <br />D.A. F. job no. 103-3924 date 4 -I( -81 sh. 4 of 7 <br />EXHIBIT 4 <br />t <br />