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2024-05-14_REVISION - C1981028
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2024-05-14_REVISION - C1981028
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Last modified
5/15/2024 8:46:26 AM
Creation date
5/15/2024 8:33:07 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981028
IBM Index Class Name
Revision
Doc Date
5/14/2024
Doc Name
Application
From
Habitat Management
To
DRMS
Type & Sequence
SL12
Email Name
RDZ
AME
Media Type
D
Archive
No
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Coors Energy Company Keenesburg Mine—Phase III Bond Release Application <br /> Revegetation Success Demonstration <br /> 3.3 Vegetation Cover <br /> Point-intercept methods were used to collect vegetation and ground cover, as well as species <br /> composition data. Each 25-meter(m)transect represents a single sampling unit. Two data points <br /> were recorded at 1-m intervals along each transect, 0.5 m to each side of and at a right angle to <br /> the transect. A laser bar was used to determine intercepts,with the beam projected vertically to <br /> the ground surface. Each point-intercept represented an absolute cover value of 2%. <br /> "First-hit"point-intercepts (the first item that the laser beam intercepts)were recorded as either: <br /> live vegetation(by plant species), litter,rock, or bare ground. Litter included all dead plant <br /> material. Subsequent "hits" on vegetation(prior to interception of the ground) were also <br /> recorded. Vegetation cover was reported in absolute percentages from the point-intercept data <br /> using all 50 first-hit observations for each sample point. Additional interceptions were used to <br /> calculate relative cover of individual plant species and life forms. The quantitative cover data <br /> also provided the basis for calculation of species composition and relative importance. <br /> Per permit specification, allowable vegetation cover was calculated for each transect to be used <br /> in hypothesis testing calculations. Allowable cover was calculated as total vegetation cover <br /> minus: <br /> • Noxious weeds; and <br /> • Annual/biennial cover> 10% of the average total live vegetation cover across all <br /> transects. <br /> 3.4 Herbaceous Production <br /> Herbaceous production was sampled using 0.5-square meter(m2) circular plots. For samples <br /> where cover data was also collected,the plots were located adjacent to the start point to the right <br /> of the transect. Production samples where no cover data were collected were placed with the plot <br /> centered on the sample point. <br /> All herbaceous non-noxious growth within each plot's vertical projection was clipped, separated <br /> by growth form, and placed in labeled paper bags. Current year's herbaceous growth of shrubs <br /> was collected in the same manner, but no woody tissue was harvested. The bags containing the <br /> clipped material were returned to the Habitat Management, Inc. office and dried at 30 degrees <br /> Celsius until weights stabilized to within 0.1 gram. Herbaceous production was reported in <br /> grams per square meter(g/m2). <br /> 3.5 Species Composition <br /> During cover sampling, all plant species occurring within 1 m on either side of the cover sample <br /> transect were noted as present within each sample. These species are presented in the data tables <br /> for each Reclamation Area(Attachment 2). Species that were not readily identified in the field <br /> were collected for later identification. Specimens were identified using floral keys (Weber and <br /> Wittmann 2001 and Wingate 1994); however,nomenclature follows the NRCS Plants Database <br /> (2022). <br /> Species composition information for comparison to the bond release standards was derived from <br /> quantitative relative vegetation cover data. The total hits (first hits and subsequent hits) for each <br /> species were used to calculate relative cover as a basis for evaluation of the importance of each <br /> encountered plant species and life form. <br /> SL-12 7 May 2024 <br />
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