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REP26054
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REP26054
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Entry Properties
Last modified
8/24/2016 11:57:25 PM
Creation date
11/27/2007 4:24:13 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981028
IBM Index Class Name
Report
Doc Date
2/28/2002
Doc Name
2001 AHR & ARR Letter to Page 65
From
Coors Energy Company
To
DMG
Annual Report Year
2001
Permit Index Doc Type
Hydrology Report
Media Type
D
Archive
No
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Herbaceous Production <br />• Total herbaceous production this yeaz in the 1997 reclamation areas was 242.71 g/m2 <br />(2163 Ib/ac), the highest of all azeas sampled. Perennial grasses contributed significantly <br />to herbaceous production, with 138.77 g/m2 (1237 Ib/ac} or 57.2 percent of total <br />herbaceous production. Annual grasses contributed 30.76 g/m2 (274 Ib/ac) to herbaceous <br />production in this area (12.7%). Annual forbs accounted for 19.93 g/m2 (178 lb/ac), <br />which was 8.2 percent of the total mean herbaceous production. Perennial forbs provided <br />the second largest lifeform contribution to herbaceous production in the 1997 reclamation <br />areas with 48.92 g/m2 (436 Ib/ac) or 20.2 percent of total herbaceous production. <br />Biennial forbs contributed the least with 4.32 g/m2 (38 lb/ac) or 1.7 percent of total <br />herbaceous production. <br />Species Composifion <br />Cover sampling identified three lifeforms and twenty-five species within the 1997 <br />reclamation areas. The lifeforms included thirteen species of perennial grass, one annual <br />grass, two perennial, two biennial, six annual forbs, and one deciduous shrub. Of the <br />species encountered on the 1997 reclamation azeas, sixteen were native and nine were <br />introduced. Perennial and biennial species outnumbered annual species by eighteen to <br />seven. Both warm and cool season species contributed to the seasonality of the 1997 <br />reclamation azeas. Cool season gaminoids outnumbered warm season graminoids by <br />eight to six. Nme forb species were identified as cool season and one was warm season. <br />The 1997 reclamation azeas had eight species contributing greater than three percent <br />relative cover including five perennial grasses, one annual grass, one perennial forb, and <br />one biennial forb. These species included Ambrosia psilostachya (23.17%), Bromus <br />tectorum (13.41%), Oryzopsis hymenotdes (10.16%), Meltlotus officinalis (8.94%), <br />Calamovilfa longifolia (7.32%), Agropyron intermedium (6.91%), Agropyron smithu <br />(4.47%), and Bromus marginatus (4.47%). <br />1998 RESEEDED OR INTERSEEDED AREAS <br />The 1998 reseeded or interseeded azeas sampled this yeaz encompass 34 acres of <br />reclamation in five distinct azeas within the Keenesburg Mine permit azea. The areas <br />include an area immediately west of the dugout, an azea south of the sediment pond with <br />three parcels, two areas south and east of the central 1987 azea, and an area west of A pit <br />bordered on the west and south by undisturbed range. Vegetation cover transects and <br />herbaceous production quadrats were distributed within the five areas based on size. No <br />sampling occurred in the south half of the area south of the sediment pond as burning and <br />disking had been undertaken in these areas to eliminate weedy species. The 1998 reseeded <br />or interseeded azeas range from flat (west of dugout, east of'87 azea) to north and south <br />sloping (west of A pit and south of'87 area, respectively). Reseeding or interseeding with <br />the permanent seed mix took place during the autumn of 1998 within these azeas with the <br />goal of increasing perennial graminoid representation. Two pazcels (one pazcel south of <br />• the sediment pond and the azea west of the dugout) sampled this yeaz had been burned in <br />-10- <br />
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