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• RESULTS <br />Data from the 1997 revegetation monitoring studies at the Seneca II Mine are presented in <br />Tables 1 through 12 contained in Appendix 1. The list of plant species observed during these <br />studies (reclaimed and reference areas) are included in Table 13 in Appendix 2. Seed mixes <br />applied on areas revegetated prior to 1981 and in years 1981 through 1993 are included for <br />reference in Appendix 3. Site data from sample transects (orientation, slope, aspect, and <br />initials of samplers) are included as Table 14 in Appendix 4. Photographs of representative <br />locations within the reclaimed areas sampled in 1997, as well as photographs of the Mountain <br />Brush and Sagebrush reference areas are included in Appendix 5. Graphic depiction of <br />summaries of vegetation data, precipitation, and total degree days are presented in Figures 1 <br />through 10 of this report, starting on page xx. <br />In the following descriptions, species that were encountered quantitatively (i.e. "hit" by a sample <br />point) are described first for a particular lifeform. Species listed as "also present" were not hit <br />but were present within one meter to either side of the sample transect. <br />• 1990 Reclaimed Areas (Photographs 1 through 4) <br />Cover (Table 1) <br />Introduced perennial cool season grass averaged 30.7 percent of total vegetation cover. <br />Intermediate wheatgrass (ThinopVrum intermedium) accounted for nearly two-thirds of this <br />average. Smooth brome (Bromoosis inermis) and orchard grass (Dactvlis plomerata) <br />together accounted for the balance. Native perennial cool season grasses averaged 23.4 <br />percent of total vegetation cover. Giant wildrye (Levmus cinereus), western wheatgrass <br />(Pascopvron smithii), and Agassiz bluegrass (Poo agassizensis) each accounted for just <br />about one-fifth of this average. (Festuca brachyphylla sso. coloradensis) was also an <br />important contributor. Mountain brome (Ceratochloa carinata), thickspike wheatgrass <br />(Elymus lanceolatus fm. dasvstachva), and beardless bluebunch wheatgrass <br />(Pseudoroeoneria spicata ssp. inermis) contributed nearly all of the balance. Introduced <br />annual grass averaged 1.2 percent of total vegetation cover. Japanese brome (Bromus <br />a onicus and cheatgrass (Anisantha tectorum) accounted for nearly all of this average. <br />lJ <br />8 <br />