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LEGEND <br />- - - - -- -Ditch <br />Supplementary Ditch <br />Culvert <br />-- - - —Half Culvert <br />- -- -Berm <br />— -- — Underdrain <br />spillway <br />--F F -- — French Drain <br />Retaining Wall <br />Monitoring Hole <br />D # -# <br />Ditch Number <br />C # -# <br />Culvert Number <br />�J <br />Watershed <br />9A <br />i <br />Sub - Watershed Within Watershed <br />Watershed Boundary <br />Small Area Exemptions <br />See Exhibit 66 for Demonstrations and Details <br />5 -Year Permit Area Boundary <br />Notes. <br />• RPE East watersheds and drainage designs <br />are provided in Exhibit 82. <br />• Clear water drainage also routed west to <br />Sylvester Culch along RPE East haul roads. <br />• Berms have been constructed primarily for <br />vehicle saftey. The berm at ditch D2R -2 <br />is an exception. <br />• Stilt fences are constructed at various sites <br />as added sediment control or to slow sheet <br />flow velocities. <br />• Miscellaneous internal ditches and culverts <br />may be added to facilitate access, etc. <br />If added, they would be sized equivalent to or <br />greater than the next downstream ditch or culvert. <br />• Due to limited level space on the Hine site, supplies <br />and materials may be stored along roads and other <br />open, previously disturbed areas, within the drainage <br />control system, except pond embankments, topsoil stock- <br />piles, and permanently revegetated areas, though not <br />identified as such on this map. Aaterials may also be <br />temporarily stored on the Refuse pile so as not to <br />preclude reclamation and /or compaction activities. <br />Storage areas will be consolidated as possible. <br />THE CHANGES TO THIS DRAWING <br />WERE PREPARED UNDER MY <br />SUPERVISION AND REPRESENT <br />INFORMATION THAT IS ACCURATE TO <br />THE BEST OF MY KNOWLEDGE <br />19 <br />32345 <br />RANGE 90 WEST, TOWNSHIP 13 SOUTH <br />MO UNTAIN COAL WEST ELK MINE <br />COMPANY L.L.C. P.O. BOX 591, 5174 HWY. 133 <br />SOMERSET, CO. 81434 <br />MAP 54C — Sediment and Drainage Control Facilities <br />Refuse Pile Expansion East <br />ENGINEERING/DRAWiNG BY DATE SCALE <br />GBG April 2010 1 = 200' <br />APPROVED BY DATE REV! - REV. NO ACAD DWG NO. <br />KG TR -120 N3SP054C.DWG <br />7-4-12-0 4 /Z- 6 /lo <br />