Laserfiche WebLink
<br /> <br /> MINED LAND RECLAMATION DIVISION <br /> Department of Natural Resources <br />' 1373 Sherman St.. Room 275 <br /> Denver. CO 60203 <br /> 303 866-356% <br />' Fax: 303 832-8t06 <br /> June 15, 1990 <br />1 <br /> <br /> <br />1 <br />1 <br />1 <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br />STATE OF COLORADO <br />of ~o~ <br />tiF%~4~ <br />~`~- 8 :,a <br />I, <br />..: `~~ <br />Roy Romer. <br />Go~aror <br />Mr. Murari Shrestha <br />Western Fuels Utah-Inc. <br />405 Urban Street, Suite 305 <br />Lakewood, CO 80228 <br />Re: Coal Refuse Revegetation Plots, File No. C-81-018 <br />Dear Mr. Shrestha: <br />We received the coal waste and topsoil analysis from the <br />and I split on April 24, 1990 as well as the additional <br />the sample Tim subsequently collected from sub area #4. <br />FreO R. Bartta. <br />DNrsion Dire:tor <br />sample Tim Chervick <br />subsoil analysis from <br />Though some variation exists between sample splits for certain parameters, <br />both refuse data sets indicate highly sodic, moderately saline material. No <br />apparent problems were indicated for topsoil or subsoil material. As I <br />indicated by letter of June 8, 1990, upward diffusion of salts into replaced <br />cover soils could be a potential reclamation concern. I would recommend the <br />following sampling be conducted upon completion of plot construction this <br />summer: <br />In both the north facing and south facing study area, at least one <br />representative sample should be taken from the 12" cover depth plots. <br />Also in both study areas, at least one representative sample should be <br />taken from each 12' cover soil increment in the 48" cover depth plots. <br />Sampling procedures and locations will need to be documented to allow for <br />valid comparison based on future sample results. Each sample should be <br />analyzed for texture. electrical conductivity and sodium adsorption <br />ratio. By repeating the sampling in future years, if should be possible <br />to determine whether any upward migration of salts is occurring. The <br />results should provide some indication of the rate and extent of upward <br />migration, if any, and the effect, if any, of soil depth and slope <br />exposure on salt migration. <br />Please let me know if you have any questions. <br />Sincerely, <br />`~ ~ -- <br />Dan T. Mathews <br />Reclamation Specialist <br />DTM/ern <br />' cc: Jim Stevens, MLRD <br />Tom Gillis, MLRD <br />