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r iiiiiiiiiiiiiiuhi 999 STATE OF COLORADO MINED LAND RECLAMATION DIVISION oF.~o~ Department of Natural Resources Room 215 7313 Sherman St a`~_ '~ yew 1~ ~ " ~ ., Denver CO 60203 ~ , _ ~~ ~ , 303 866-3567 ~ ` • X976 ` FA x: 303 832-8106 Ray Romer. Governor Fretl R. Banta, Division Director DATE: July 13, 1990 T0: File ~ ~, FROM: Matthew Hayes ~- RE: 1990 Midterm Review: Blue Ribbon Mine; C-81-047 The following adequacy issues surfaced during a review of general, vegetation, and soil topics in the Blue Ribbon permit application. 1. Page 107i should be revised to identify that the truck scale facility was eliminated from the permit area by Technical Revision 3. 2. Please indicate on page 108 the schedule at which reclamation was carried out and completed. 3. The Division requests that sampling techniques listed on page 113ii be revised. Specifically, a. Cover must be estimated by a more unbiased method than an "ocular estimation technique". Please revise this section of the permit to address another technique, preferably the point intercept method. A description of this technique can be found in the Division's Land Use and Vegetation Guidelines on pages 6 and 7. b. Paragraph number 4 on page 8 of the above referenced Guidelines states the following with reference to gathering production data: "Standard clipping procedure is to clip either plants rooted in the quadrat or to clip plants and plant parts within the volumetric vertical projection of the plot. The method used must be described in the application and applied consistently in all baseline and subsequent sampling". Please address the topic of this paragraph in the permit application. c. Page 113ii of the permit application states, with reference to shrub density measurement, that "Total number of stems per acre will be measured through counting stems greater than 0.5 meter in height in rectangular plots, 2-m x 10-m, that are randomly located." The Division recommends that MINREC, INC. revise the permit to include woody stems less than 0.5m in height in the woody stem density counts. Furthermore, the Division recommends that sample quadrants be increased from 20 square meters to 50 (50 m x lm) square meters. The increase in size will increase the likelihood of reaching sample adequacy.