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<br />• • III IIIIIIIIIIIIIIII <br />STATE OF COLOiv~UU <br />Roy Romer, Govei <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Director <br />PATE: September 18, 1989 <br />T0: Cathy Begej ..---,,~~ //~~ <br />FROM: Carl Mount~~j(/I <br />RE: Bourg Vegetation Study, <br />Permit C-81-021 <br />also measured vegetation cover this year at the Bourg (WCC) site. MLRD <br />findings are tentative (no statistics have been performed on the data) so <br />comparisons at this point are, necessarily, somewhat speculative. <br />Walden Coal Company (WCC), <br />I have reviewed the 1989 "Evaluation of Re vegetation Success at the Walden <br />Coal Company Mine Site" report as you requested. Cover measurements were <br />performed using standard optical point sampling methods along 25 meter long <br />transects. This method for sampling cover is acceptable. MLRD personnel have <br />In general, total vegetation cover and total ground cover at the mine site <br />look good and compare favorably with reference area data taken in 1980. I <br />have taken the liberty of slightly modifying and ha vi no typed the tables which <br />you compiled on cover values (see Tables 1 and 2). Keeping in mind that <br />comparisons are somewhat speculative, it is interesting to note that <br />Dr. Keammerer's values for total ground cover and bare soil are within 4 or 5 <br />percent of MLRD values. <br />Total plant cover value differences can be attributed to times of sampling. <br />MLRD sampling occurred on August 30, 1989. I am assuming that Dr. Keammerer <br />sampled the vegetation in June or July since the report is dated July, 1989 <br />and does not specify sample dates. If this is true, then Dr. Keanunerer would <br />have sampled the vegetation prior to growth season maturity and one would <br />expect the MLRD total plant cover value to be slightly greater than <br />Dr. Keammerer's value (Table 2). <br />215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-3567 <br />