Laserfiche WebLink
1 <br /> <br />1 <br /> <br /> <br /> <br />1 <br />1 <br />1 <br />t <br />1 <br /> <br />1.0 INTRODUCTION <br />In August 1986, reclaimed areas at the Hayden Gulch Mine were sampled to <br />evaluate the trend of vegetation establishment and to identify any major <br />deficiencies in revegetation efforts. Two seed mixtures have been used on <br />reclaimed areas at the mine. The mixtures listed on Table 1 were used from <br />1979 - 1981, and the mixture on Table 2 has been used since 1981. This <br />change in seed mixture is reflected in the stands of vegetation present on <br />the reclaimed areas during the evaluation. The major c <br />were 1) vegetation cover, 2) species diversity, 3) shru W~Pi"wbo4~ ~ <br />re~~ <br />productivity. <br />2.0 METHODS <br />,TiS ~ p~"~u0 -lo olD <br />l~-~r rec~~ <br />Sampling was divided into two distinct areas, those in the second growing <br />season and those in the third growing season or older. Areas reclaimed in <br />1979 and 1980, were sampled as a single unit. Acreage reclaimed in 1982, <br />1983 and 1984 were sampled individually. Acreages for each area are shown <br />on Table 3. The location of the sampling areas is shown on Exhibit 1. A <br />list of species encountered during sampling in all areas is found on <br />Table 4. <br />2.1 VEGETATION COVER <br />' Vegetation cover was determined utilizing the point-frame method. Sampling <br />points were located using a random numbers table to determine compass <br />' direction and the number of paces. Four hundred points were sampled in <br /> areas where vegetation was in the third growing season or older. One <br />' hundred fifty points were sampled in <br />i <br />f <br />C <br />h <br />d <br />h <br />i <br />l <br />d <br />d areas in the second <br />A <br />di <br />A <br />i growing season. <br /> nc <br />es o <br />e <br />ata s <br />eets are <br />u <br />op <br />t <br />e n <br />ppen <br />. <br />x <br />' 2.2 SPECIES DIVERSITY <br />' Species diversity values were obtained by interpreting point-frame data and <br />evaluated utilizing the criterion outlined in the permit. This criterion <br />' required that the relative cover of four cool season grasses and one forb <br />' -1- <br />