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GENERAL35234
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Last modified
8/24/2016 7:56:19 PM
Creation date
11/23/2007 8:15:10 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981031
IBM Index Class Name
General Documents
Doc Date
8/24/2004
Doc Name
Revised 2003 Vegetation Sampling
Permit Index Doc Type
Vegetation
Media Type
D
Archive
No
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(Smooth brome) contributed greater than 10% relative cover each with 10.78% <br />and 10.34% respectively. Compilation of the cover data for the three warm <br />season grasses resulted in a total of 4.32% relative cover contribute by warm <br />season grasses. Two perennial forbs contributed greater than 3% relative cover <br />each. These two forbs were Convulvu/us arvense (Field bindweed) contributing <br />40.5%, and Spheralcea coccinea (Scarlet globemallow) with 6.47% relative <br />cover. None of the species encountered are toxic to livestock or require weed <br />control according to the Huerfano County weed district. Two of the nine <br />perennial forb species, Astraga/us bisulcatus (two-grooved milkvetch) and <br />Hedysarum borea/e (Hairy vetch) are legumes, and are considered nitrogen- <br />fixing species. Annuals and biennials comprise less than 6% of the vegetation <br />cover (18.9% relative cover). The diversity of the dominant life-forms and <br />species indicate the successful establishment of a permanent vegetation <br />community. The relatively low contribution by annuals and biennials, along with <br />the vegetative cover rebound after the 2002 severe drought year, further support <br />the successful establishment of a permanent vegetation community. <br />Production <br />Herbaceous biomass collected and weighed from the New Pryor Mine on June <br />25, 2003 had an average air-dry weight of 808 Ibs/acre (90.648 g/M2). These <br />data are found on Table 3. Based upon the revegetation standards derived by <br />the Division, the reclaimed area production should equal or exceed 90% of 237 <br />Ibs/acre (26.6 g/mz). The reclaimed area average production of 808 Ibs/acre <br />exceeds the minimum production success standard of 213 Ibs/acre by nearly <br />four-fold. During sampling it was apparent the mine had been grazed as <br />evidenced by cattle droppings. No cattle were on the site at the time of the <br />sampling. The mine is apparently being utilized as rangeland (the target post- <br />mining land use) and shows considerable evidence of recovery from drought and <br />grazing. <br />Woody Plant Stem Density <br />Two woody plant species were encountered during sampling on June 25, 2003; <br />Atriplex canescens (four-wing saltbush) and Chysothamnus vicidiflorus (Green <br />rabbitbrush). These data are found in Table 4. Both species are native to the <br />region. Data was collected by counting all woody plant species within one metes <br />of either side of the cover transects, resulting in belt transects covering an area <br />of 30.5 MZ. Fourteen woody plants were encountered in 15 belt transects. <br />These data represent 0.93 stems per 30.5 MZ or 124 stems per acre. Woody <br />plant data was not collected to adequacy. Pre-mining data indicated that much <br />of this area had a significant shrub component prior to mining disturbance. The <br />area around the mine site consists of open grasslands and dense pinyon-juniper <br />communities. The area disturbed by the mine is relatively small, approximately <br />26 acres. <br />
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