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DC?A^n I MINT OF NA I URAL RESOURCES <br />D. Moore °asco=. Execurve Director <br />MINED LAND RECLAMATION D <br />DAVID C. SHcL70N Director <br />rl ip ha rc D.! arm, <br />uo~ernor <br />January 24, 1983 <br />Mr. Rich Atkinson <br />Colowyo Coal Company <br />5731 State highway 13 <br />Meeker, Coiorade 81641 <br />Re: Overburden Sampling Minor Revision <br />file No. C-019-81 <br />Dear Mr. Atkinson: <br />The Division has reviewed the minor revision request submitted by Colowyo <br />in order to refine the overburden monitoring plan. The minor revision is <br />approved by the Division. It should be recognized that the suspect <br />• levels which would trigger further analysis and/or selective handling are <br />based on the fact that 18" of non-saline, non-sodic topsoil will be <br />replaced over regraded spoils. <br />This depth of replaced topsoil mitigates the potential adverse physical <br />effects of high SAR overburden and provides sufficient water holding <br />capacity to support growth of the herbaceous species. Based on the <br />precipitation regime and soil characteristics at Colowyo,rupward <br />migration of salts into the topsoil would not be expected. Salt <br />tolerances of native shrub species have not been extensively researched, <br />but based on available information for the shrub species included in the <br />reclamation plan, the suspect levels identified in the minor revision are <br />acceptable. <br />Sincerely, <br />Dan T. Mathews <br />Reclamation Specialist <br />DTM/mmfi <br />G ^~.~~j ~K3r <br />. r? ~~ i l~ <br />~~~ ~~hrl z s ;0~3 <br />• '' ~ <br />~~__,; ."O COAL COAhPt~NY <br />u;~~fn=cur~IHrroN nt==r. <br />nno r~,._~.._,_: _: n..:: ~:__ n n:.._____ r.___. n.... ,,... h,-,i...o.in R110/1Q TcI fQl1'21 RRR_4Sn7 <br />