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~~'~~I~IIIIIIII I j <br />DEPARTMENT OF NATURAL RESOURCES <br />D. Monte Pascoe. Esec utive Director <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SHELTON Director <br />R~char0 D Lamm <br />Governor <br />January 24, 1983 <br />Mr. Rich Atkinson _- <br />Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, Colorado 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, upward <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 />c.~ ( . <br />Dan T. Mathews <br />Reclamation Specialist <br />DTM/mmt <br />D ~ t~ <br />,;AN 2~ 1983 <br />i.~_:..+YO COAL COMPANY <br />LANDIRECLAMATION DEPT. <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 <br />