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2020-08-20_PERMIT FILE - C1980007A
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2020-08-20_PERMIT FILE - C1980007A
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Last modified
12/8/2020 8:12:58 AM
Creation date
8/21/2020 9:34:11 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1980007A
IBM Index Class Name
Permit File
Doc Date
8/20/2020
Doc Name
2.05-50 Thru 2.05-88
Section_Exhibit Name
2.05.4 Reclamation Plan
Media Type
D
Archive
Yes
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Table 40 Species Identified in Riparian Areas at the West Elk Mine Cont. <br />Juniper <br />Juniperus communis <br />Mountain Lover' <br />Paxistima myrsinites <br />Colorado Blue Spruce+ <br />Picea pungens <br />Aspen' <br />Populus tremuloides <br />Gambel's Oak' <br />Quercus gambelii <br />Red Osier Dogwood' <br />Swida sericea <br />+ Additional species identified in the Riparian Community during vegetation study in Sylvester Gulch, 1996 (Exhibit 32A) <br />area was quantitatively sampled for four vegetation parameters; vegetation cover, herbaceous production, <br />species composition, and woody plant numbers. Additionally, the soil characteristics of the selected area were <br />quantitatively analyzed and evaluated in 1996. <br />Precipitation data over a ninety year period (1905-1995) was analyzed to specify a precipitation regime range. <br />An initial requirement of the historic record methodology was to sample the historic record vegetation <br />community over a range of precipitation conditions (dry, normal, and wet years). From the historic <br />precipitation records, a "normal" precipitation regime (in inches of precipitation) was developed based on the <br />amount of precipitation received during the eight months preceding the growing season (October through <br />May). Relative to this "normal" precipitation amount, "dry" and "wet" precipitation years were defined, using <br />the standard deviation of the "pre -growing season" precipitation record. <br />The initial quantitative vegetation sampling of the historic record vegetation community, called the Historic <br />Records Study Area (HRSA), took place in 1996. The HRSA sampled for a second year in 1997. In 1998, the <br />third year of quantitative vegetation sampling was undertaken. Discussions with the CDRMS in 1999 revealed <br />a desire to undertake additional quantitative sampling during a defined "wet" year. <br />Subsequent to the 1999 meeting, changes in staff at both CDRMS and MCC, and the lack of a defined <br />"wet" year ("pre -growing season" precipitation value greater than 13.71 inches), caused years to pass without <br />resolution and establishment of the final revegetation standards accepted under the revised historic records <br />approach accepted by CDRMS in 1995. <br />In an effort to finalize establishment of revegetation success criteria for the. West Elk Mine, quantitative <br />sampling was undertaken in 2010 at the HRSA. The results of the sampling were compiled in a summary <br />report with additional evaluations of precipitation trends and correlations of the sampled vegetation <br />parameters and prevailing precipitation regime. See the report in Exhibit 61. <br />To finalize the revegetation success criteria for the West Elk Mine, and in light of the lack of a predictable <br />defined "wet" year, MCC proposed, and CDRMS accepted, that the existing data from the 1996, 1997, 1998, <br />and 2010 quantitative sampling of the HRSA be utilized to calculate and establish revegetation success criteria <br />for total vegetation cover, total herbaceous production, and species composition. Establishment of the final <br />revegetation success criteria entailed the averaging of the four years of data from total vegetation cover and <br />total herbaceous production, and using the resulting parameter value as the revegetation success criterion. A <br />final revegetation success criterion for species composition was established based on the relative cover and <br />seasonality of dominant plant species from both the historic record vegetation community and baseline <br />2.05-68 Rev. 11/96- PR07; 04/06- PR10; 07/11- TR125 <br />
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