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2009-06-24_PERMIT FILE - C1981019A (3)
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2009-06-24_PERMIT FILE - C1981019A (3)
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Last modified
8/24/2016 3:48:08 PM
Creation date
9/28/2009 10:40:47 AM
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Template:
DRMS Permit Index
Permit No
C1981019A
IBM Index Class Name
Permit File
Doc Date
6/24/2009
Section_Exhibit Name
4.15 Revegetation Requirements
Media Type
D
Archive
Yes
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applicable performance standards be limited to 20%. As an example, should an area <br />demonstrate 375 live shrub plants per acre, 300 of those plants must be something other <br />than fourwing saltbush. Colowyo believes that on-site research partially refutes the data <br />collected at other locations with respect to fourwing saltbush longevity but has <br />compromised in this case given the concerns raised by the Division. <br />Diversity <br />The initial Permit Application addressed Diversity by using the Shannon Weiner Index to <br />measure the distribution of species within the existing premine vegetation community. <br />Over the early years of SMCRA compliance, this procedure was determined to be <br />problematic for this use as a means to evaluate diversity. <br />Colowyo did not feel comfortable using such a complicated Index, but did so because it <br />was the norm at the time to use this method. <br />Since the initial Permit Application, CDRMS regulations have been revised to allow for <br />the use of comparisons of species composition based on cover between the reclaimed <br />area and the undisturbed vegetation. <br />This method of analyzing diversity was applied to the weighted premine herbaceous <br />vegetation cover data originally sampled and summarized in Section 2.04.10 on Table 2, <br />1980 Herbaceous Cover by Species. <br />A total of four species with a combined contribution to diversity of 43.4% have been <br />chosen to characterize the premine vegetative community diversity standard. <br />The vegetative species with their contribution to diversity are as follows: <br /> Species % Contribution to Diversity <br />(1) Poa pratenensis 22.6% <br />(2) Agropyron Smithii 10.8% <br />(3) Achillea lanulosa 6.7% <br />(4) Stipa viridula 3.3% <br /> 43.4% <br />Although Gallium and Lupinus caudatus rank reasonably well in the diversity <br />(composition) scale, they were not included in the diversity goals for reclamation. <br />Gallium is an annual, while Lupinus caudatus is considered toxic to livestock and is most <br />likely a product of overgrazing. Colowyo is interested in reclaiming with vegetation <br />species with equal or superior utility for the postmining land use when compared with the <br />utility of the naturally occurring premine vegetation. Neither Gallium nor Lupinus <br />provides any utility towards supporting the premining land use. <br />Three of the species are perennial cool season grasses and one specie is a perennial forb. <br />All of the species are found throughout the premine area on all soil types and moisture <br />4.15-25 Revision Date: 3/14/08 <br />Revision No.: TR-72
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