Laserfiche WebLink
6b, 7b and 8b). Total vegetation cover had decreased substantially between the two years <br />(45.6% to 38.9%). Meanwhile, cover by annual/biennial species declined from 29.0% to 11.9% <br />and native perennial cool season grasses rose from 16.4% to 20.3%. One of the desired <br />outcomes in the younger revegetation is for the cover by grasses to be more "restrained." In the <br />presence of more restrained grass exuberance in the 2002 reclamation, the development of <br />native perennial (orbs has moved up from 1.7% in 2004 to 3.1 % in 2006. Development of <br />introduced perennial forbs cover has also been somewhat restrained with alfalfa in 2006 <br />J <br />comprising about 0.2% cover, a level far below those that were deemed to be excessive in the <br />very old reclamation of the area (at the Seneca II Mine) where alfalfa had comprised a much <br />larger presence in the seed mixes in the early days and had been considered too abundant. <br />Herbaceous Production <br />Observed production values and derivation of the 2006 herbaceous production standard are <br />compiled 1 documented in the table below: <br />Yoast2006 <br /> <br />Vegetation Type Mean Herbaceous Production <br />(Ib/ac) % of Affected Area <br />Sagebrush/Snowberry 657 24.0 <br />Mountain Brushe 557 48.9 <br />Aspen Woodlands 764 24.4 <br />Steep Mountain Brushe 473 2.7 <br />Alkali SagelWest Whtgrs. a 716 0.0 <br />2002 Reclamation Area 952 NA <br />2004 Reclamation Area 969 NA <br />e Seneca IIW extended reference area values from data collected in 2006 <br />° As corrected for production by annuals in excess of 10% to total production <br />Herbaceous production performance standard (weighted by percent of affected area) = 629 Ib/ac. <br />90 percent of performance standard = 0.9 x 636 = 566 Ib/ac <br />As can be seen, the observed herbaceous production in both the 2002 and 2004 reclaimed areas <br />greatly exceeded the production standard. <br />15 <br />