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<br />G92-080: TR-03. adwuacv n:soonses: Ham Itannev 4 <br />placement of woody species in clumps. These clumps would be included in <br />the overall woody plant density. Without additional justification or <br />confirmation from the Colorado Division of Wildlife to alter the approved <br />standard, the Division retains the woody plant density at 1000 stems per acre. <br />12.6) Please refer to the response for l ].b). <br />12.c) The Division requested clarification of the cropland reclamation productivity <br />standard, as the permit pages 5-33 and 5-34 contained slightly different <br />performance standards. In a letter submitted on behalf of Oakridge Energy, <br />Inc., dated June 18, 1996, it was proposed that the cropland produMivity <br />standard be measured in a biomass yield per acre. This would be reported <br />in pounds per acre. The Division considers this appropriate. This change will <br />allow for more flexibility of the crop species grown. The use of the <br />conversion of 1 bushel of wheat equal to 60 lbs, is appropriate too. (This <br />conversion is substantiated in The Western Fertilizer Handbook 6th ed., <br />produced by Soil Improvement Committee California Fertilizer Association.) <br />This conversion would result in a standard of 1170 pounds of biomass yield <br />per acre for the cropland post-mining land use designation. A revised page <br />5-34 was submitted October 2, 1996 refleMing this text change. Bushel yield <br />is in line with the La Plata SCS soil survey for non-irrigated wheat production <br />(p.163). <br />The operator states that there is a letter from the landowner addressing Rules <br />4.15.7(2)(d)(v) and 4.15.9, to provide several years data for establishing <br />cropland productivity values. I was unable to locate this letter. Please direct <br />the Division to where it is in the permit, or provide a copy to the Division. <br />Please explain how many years the Historic productivity standard is based <br />upon. <br />13.a) OEI's response is acceptable. <br />13.b) Please refer to Goff Engineering and Surveying's report on the stability of the <br />sandstone slope and terraces, dated August 19, 1996. This portion of the <br />reclamation plan will need to be revised to assure stability. <br />14) A typo was noted on page 5-33, incorrectly referencing Table 5-7. This page <br />has been corrected to reflect the table as 'Table 5-6". This correction satisfies <br />the Division's comment. <br />15) The Division specifically requested that map 5-5 be revised to reflect the post- <br />mining revegetation distribution. Map 5-S was not submitted with the <br />revision. Additionally, since the Mountain Shrub reference area has <br />apparently been altered by a golf course, what reference area or comparison <br />