Laserfiche WebLink
3.0 RESULTS <br />3.1 QUANTITATIVE EVALUATION: RECLAMATION AREA 23 <br />Reclamation Area 23 encompasses 0.66 acres of reclamation in one parcel within the <br />Keenesburg Mine permit area. Reclamation Area 23 was formerly access to the B Pit <br />mining area and was reclaimed to a gently west - sloping landform blending into the <br />reclaimed B Pit to the west and older reclaimed mining areas to the east. Final <br />revegetation seeding with the permanent seed mix took place in the autumn of 2002. <br />Specific vegetation information for Reclamation Area 23 is contained in Tables 1, 2, and <br />6. <br />3.1.1 Vegetation Cover <br />Total mean vegetation cover of Reclamation Area <br />Graminoids provided all vegetation cover within this <br />season native perennial grasses were encountered <br />(sand bluestem) and Calamovilfl! Iongifolia (prairie <br />(sideoats grama), a warm season perennial native <br />transects. Three additional species were encountered <br />23 this season was 32.00 percent. <br />reclaimed area this year. Two warm <br />in all transects; Andropogon hal/ii <br />sandreed). Bouteloua curtipendula <br />grass, was found in 60 percent of <br />in two or fewer transects. <br />Within Reclamation Area 23, Calamovilfa longifnlia was dominant, with contributions of <br />18.80 percent total and 56.04 percent relative vegetation cover this growing season. <br />Three additional species encountered contributed three or more percent relative cover <br />including; Andropogon hallii with 9.20 percent total (27.47% relative cover), Bouteloua <br />curtipendula contributing 2.40 percent total and 10.99 percent relative cover, and <br />Bouteloua gracilis (blue grama) with 0.80 percent total cover (3.30% relative cover). <br />Vegetative litter (prior years growth and other biologic organic material) comprised 52.00 <br />percent ground cover overall within Reclamation Area 23 this season. Bare soil <br />accounted for 16.00 percent of the ground cover. No rock or cryptogams were <br />encountered during the cover sampling this year. <br />3.1.2 Herbaceous Production <br />Total herbaceous production within Reclamation Area 23 was 143.0 g /m (1275 lb /ac) <br />this year, of which more than 99.99% was contributed by perennial graminoids. <br />3.1.3 Species Composition <br />Cover sampling identified one lifeform and six species within Reclamation Area 23 this <br />season. The graminoid lifeform included five species of perennial grass and one annual <br />grass species. Of the species encountered in Reclamation Area 23, five were native and <br />one was introduced. Perennial species outnumbered annual species by five to one. Both <br />warn and cool season species contributed to the seasonality of the area. Warm season <br />graminoids outnumbered cool season graminoids by five to one. <br />Coors Energy Company Keenesburg Mine Page 10 <br />2012 Revegetation Monitoring Report <br />