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• PREMINING INVENTORY OF PLANTS <br />ON THE ROCK CASTLE MINE <br />There are three rather distinct vegetation types on the Rockcastle mine <br />lease that is located south of Hayden, Colorado. The average annual par- <br />ticipation is estimated to be 17 inches. During the calendar year of 198U the <br />annual precipitation at the Hayden Station was 15.4 in. X11 The growth con- <br />ditions for plant life was believed to be about average for the area included <br />in the inventory of the area to be disturbed by mining, <br />Inventory Procedure <br />The permit area that will be disturbed will involve about 110 acres. <br />There appear to be three major vegetation types: aspen, mountain brush, and <br />sagebrush. In each of the three vegetation types, an ocular reconnaissance <br />was conducted and inventory parameters were sampled according to the regula- <br />tions prescribed by the Colorado Mined Land Reclamation Board. <br />• The permit areas as shown on the Vegetation map have from six to 11 <br />cluster plot areas for each vegetation type. From three to five acres within <br />each cluster area were sampled for plant cover and current biomass. Within <br />each cluster area, trom five to six samples were taken depending upon variabi- <br />lity among samples. This (~e„a-„~Pd o.• j'ol~~,,,K~ pa~-~ <br />~1~ Personal communication with Odie Panella, Colorado Climate Center, <br />1-21-81. <br />• <br />II.J-2 <br />12/87 <br />