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State Req. ~e majority of the reclamation grading work is performed with • dozers aryl motor graders. In scone cases grading may be done with scrapers and draglines. All areas affected by surface opal mining operations, except as specifically exempted by the Q+IIRB, will be returned to their an=*ry»te original contours. Zhis includes the drainage channels which were returned to approximate original locations to help maintain appropriate downstream water rights. Included with this information are F]diibits 12-9a through 12-9e which omnpares the preminirxJ and posGnirie ephemeral stream channel profiles. shown on these profiles is the similarity between the prem;n;m and ptxtm;n;m profiles as required in Section 4.14.2.1. Peabody Coal Cmig~any has included in the postmine grading operation the use of very small swales to minimize erosion and to conserve soil moisture and promote vegetation. Stock tanks • will be utilized in the postmine grading operations to minimize erosion and provide water for livestock and wildlife. See Arrma,vl;x 13-9 for design information. These very small swales do not interfere with attempts to maintain the most efficient slopes in the postmine grading areas. Also, attempted is the reestablishment of drainage charu~els to their original natural meandering pattern to minimize erosion, to conserve soil moisture and promote vegetation. All postmine drainage channels are mulched and revegetated as soon after topsoil placemes~t as is practical and the appropriate growing season occurs. After the vegetation has been established, each drainage area is monitored by a reclamation specialist for areas requiring augmented revegetation until natural revegetation occurs. 4.14.3 (1) OOVIIt~IG COAI, AND ACID- AND ~XIC-FORMING ~+'~TAT S Cover. Peabody Coal Cca[g~any will cover, with a minurnun of 4 • feet of the best available material, all exposed coal seams 12-59 Revised 11/28/90