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<br />•~ <br />CONTRACTORS <br />ENGINEERS <br />DEVELOPERS <br />MORRISON-KNUDSEN COMPANY, INC. <br />~L~L~~~! <br />~...1~IS>4 <br /> <br />E%ECUTIVE OFFIOE <br />TWO MONRISON-KNUDSEN PLAZA <br />P 0 80% %908 i BOISE. ~OANO 67129 / U.5 a <br />PHONE i206) 7455000 ~ TELE%. 768479 <br />August 5, 1980 <br />Ms. Carol Pahlke <br />Mr. Ji^~ Herron <br />Colorado Department of !•laturai Resources <br />Mined Land °eclamation Division <br />723 Centennial Building <br />1313 Sherman Streei <br />Denver, CO 80207 <br />Dear Ms. Pa hike and hlr. Herron: <br />r~rirl~D ~ Aho ~1tcLNtiiA~lnnl <br />The purpose of this letter is to review the major points of our meeting of <br />July 25, 1980, concerning the upcoming vegetation reference areas study <br />at the Hayden Gulch mine. As I indicated in our meeting, I want to <br />document the study requirements that we discussed so that criteria for <br />successfully completing the work are clearly understood. If you are in <br />agreement with the follo~vina summary of our meeting, I would ask you to <br />sign the enclosed copy of this letter and return it to me. If there <br />are some areas of disagreement, please contact me immediately. <br />I indicated that reference areas would be established for each major <br />vegetation type on the mine plan area. These include aspen, oak brush <br />and mountain shrub type vegetation. It may be necessary to subdivide the <br />mountain shrub type into more than one vegetation type to achieve <br />sample adequacy requirements. This subdivision might result in recognition <br />of communities on a basis other than solely the dominant vegetation. For <br />instance a high cover, production, density community might be recognized <br />versus a low cover, production, density community. These two communities <br />might have many species in common. You felt this aporoach would be satis- <br />factory if some supportive evidence could be provided as to the basis <br />for grouping the mountain shrub data into more thar, one community <br />classification. I felt the data could be used to "point the way" toward <br />the most logical community groupings. <br />Reference areas will be chosen so as to be Duite similar to the communi- <br />ties on the mine plan area. A total of at least three acres will be <br />established for each reference area. .Jo site smaller than one acre will <br />be used as part of a reference area. Only land surface controlled by <br />H-G Coal Company will be considered for reference area use. <br /> <br />