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REP44072
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Last modified
8/25/2016 12:46:25 AM
Creation date
11/27/2007 10:07:52 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
Report
Doc Date
8/31/1993
Doc Name
POWDERHORN COAL CO ROADSIDE REFUSE DISPOSAL AREA FIELD TRIAL EVALUATION OF TEST PLOT VEGETATION AND
Permit Index Doc Type
REVEG MONITORING REPORT
Media Type
D
Archive
No
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1 <br />t <br /> 3.1.6 Shadscale Shrubland Reference Area <br />' <br /> The Shadscale Shrnbland Reference Area is located above the Roadside Mine on a <br /> predominantly west facing slope of native outcrop and colluvial material washed down <br />' from the Grand Mesa. It is bounded on the west by the Mine Facilities Area and I-70, <br /> on the north by steep slopes and I-70, and on the east and south by relatively <br /> undisturbed rangeland. The Shadscale Shrubland Reference Area is not fenced, <br />however access is restricted to four wheel drive roads which are locked and gated. The <br /> Shadscale Shrubland Reference Area encompasses approximately 24 acres. The <br /> predominant aspect of the area is west, with small areas facing south and southeast. <br /> The prevailing grade is very steep, averaging 22 degrees. Of significant note was the <br /> large component of volcanic material present in sizes from cobbles to boulders. Figure <br /> 17 provides a photographic illustration of the Shadscale Shrubland Reference Area. <br />' 3.2 Test Plot 1 <br /> 3.2.1 Test Plot 1: 6" <br />' Cover <br /> Total vegetation cover for this treatment was 12.8°6. Graminoids accounted for 10.4% <br /> mean cover, forts for 1.6% mean cover, and woody plants 0.83'0 mean cover. <br /> Cryptogams provided 3.6% total cover. Litter accounted for 24.43'0 total cover, rock <br /> 0.43'0, and bare ground 58.8%. Cover results for this treatment are listed in Table 3. <br />' Th <br />d <br />i <br />i <br />B <br />i <br />Ch <br />6 <br />/ <br />8 <br />0 <br /> om <br />nant grass spec <br />es were <br />romus japon <br />tectorum ( <br />eatgrass) at <br />e <br />cus <br />. <br />9 <br /> mean cover (61.530 relative cover). Subdominant species included Sporobolus airoides <br />' (Alkali Sacaton) at 1.236 mean cover (9.230 relative cover), Hilaria jamesii (Galleta) at <br /> 0.4°10 mean cover and 4.6% relative cover, Agropyron cristatum (Crested Wheatgrass), <br /> and ,~ropyron smithii (Western Wheatgrass), each accounting for 0.43'0 mean cover <br />' and 3.1% relative cover. Bromus japonicus/tectorum is a cool season introduced <br /> annual, Sporobolus airoides and Hilaria jamesii are warm season perennial natives, and <br /> the remaining subdominant grasses are perennial cool-season natives, excepting <br />' Agropyron cristatum. <br /> Dominant fort species included the annuals Lappula redowslai (Western Sticktight) at <br />' 0.830 mean cover (6.2% relative cover), Ceratocephala orthoceras (Hornhead) at 0.496 <br /> mean cover (3.196 relative cover), and Ha/ogeton glomerata (Halogeton) at 0.4% mean <br /> cover (3.1 Jo relative cover). The above species all represent annual introduced species <br />' characteristic of disturbed areas. <br />1 <br />' 28 <br />
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