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Southfield Mine <br />Minor Revision Request No. 76 <br />South Fan Installation <br />Following construction of the portal seal, the fan portal and fan <br />installation site will be backfilled and graded to provide a minimum of 4 <br />feet of suitable cover over any exposed coal seams or debris with ~~ ~ 5 <br />maximum 3H:iV slopes. Most of the required fill material can be ~~ ~~ <br />obtained from the temporary stockpile established during site clearing <br />and grading. This material will be supplemented as necessary from an <br />existing overburden stockpile created when the Monarch No. 4 Mine <br />portal bench was established. The location of this supplemental borrow <br />source is shown on the South Mine Fan Installation Map, (Map MR16-1). <br />Following removal of the temporary stockpile, this area and the <br />supplemental borrow area will also be graded to blend with the <br />surrounding terrain. Temporary drainage control ditches and berms will <br />not be removed during final grading. These structures will be retained <br />to provide drainage and sediment control during the period of vegetative way <br />reestablishment. Due to their limited size, these structures will not~~~u~ <br />significantly impact the hydrologic balance and will eventually be ~-°L'v` <br />eliminated through the natural processes of siltation and erosion. -~.1 <br />~~11~ <br />Prior to backfilling, both potential fill sources will be sampled to verify <br />suitability and the best material will be reserved for surface placement. ~~~ <br />If suitability concerns are identified by sampling and subsequent ~ ~ <br />analysis, EFCI will develop alternative placement or treatment plans <br />and/or will identify alternative borrow areas for Division review and <br />approval. <br />Backfilled and regraded areas including the portal area, fan installation <br />site, temporary stockpile area and supplemental borrow area will be <br />ripped to alleviate compaction and reseeded using the permanent seed <br />o: Bon P ~~ ~M+o+e.eeo <br />tt/Y!/Bl ~Pm 14 <br />