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PERMFILE125475
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PERMFILE125475
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Last modified
8/24/2016 10:22:52 PM
Creation date
11/25/2007 1:58:30 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981008A
IBM Index Class Name
Permit File
Doc Date
7/30/2007
Doc Name
Dryland Pasture Reference Area -1999,2000,2005
Section_Exhibit Name
Section 2.04.10 Vegetation Information New Horizon 2 Mine Area
Media Type
D
Archive
Yes
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• Woodv Plant Densities - 1987. Woody plant densities were measured in the sagebrush type <br />and willow component of the Swale/drainage type using belt transects. All trees, shrubs, sub- <br />shrubs, succulents, and agavoids were included in the counts. A species was counted for <br />density when at least 50 percent of the crown emerged within the belt. A 2m x 25m belt, <br />originating at the randomly-located sample point and extending in a random direction, was <br />used in the sagebrush type. Arandomly-located 0.5m x 2.Om belt was used in the willow <br />component of the Swale/drainage. This small belt size was selected on the basis of the <br />extremely dense character of the willow thickets. <br />Woody plant densities were measured in the irrigated pasture vegetation type using direct <br />counts from 1" = 500' color aerial photography with field checks for verification. <br />Sample Point Selection - 1999. Individual sample point locations, and belt transect origins <br />were selected using pairs of randomly-generated coordinates. The 1999 vegetation map was <br />brought into ESRI ArcView and a state plane 100 foot interval tic grid was overlaid on the map. <br />Coordinates located within a map unit were listed and exported to Microsoft Access where a <br />• random number generator was used to pick pairs of coordinates for sampling locations. The <br />numbers 0 to 359 were also entered into Microsoft Access and a random number generator <br />used to select transect direction. <br />Sample point locations were located from the resultant transects being plotted on the raster <br />digital aerial photo. The observer then walked to that point using visible landmarks. Once the <br />vicinity of the sample point was found, a orange spike was thrown over the observer's shoulder <br />to identify the exact location where the sampling point would be located. <br />Vegetation Cover and Freauency -1999. Quantitative measurements of vegetation cover <br />and plant species frequency were made in the sagebrush - 1 (SG-1 ), sagebrush - 2 (SG-2), <br />sagebrush reference area, dryland pasture reference area, irrigated pasture and <br />Swale/drainage vegetation types. <br />Vegetation cover data was collected in the sagebrush type by the point-intercept technique <br />applied by use of an laser point bar. The data was collected on July 13 through 20, 1999. The <br />• (Revised August 2006) 2.04.10-28 <br />
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