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• <br />Table 1. Vegetation cover, production and woody stem densities on disturbed (postmine) and undisturbed drainages at Trapper Mine in 1988 and 1989. <br />Herbaceous Canopy Cover (%) Herbaceous Production (lbs/acre) <br />Reconstructed Drainage (1)(2) Irrigated(3) Non-Irrigated Irrigated Non-Irrigated <br />1988 1989 1988 1989 1988 1989 1988 1989 <br />Upper Coyote (topsoiled) <br />Middle Coyote (topsoiled) <br />Lower Coyote (topsoiled) 51 79 <br />Upper West No Name 36 <br />(topsoiled) <br />Lower West No Name 50 <br />(topsoiled) <br />Upper East No Name <br />(not topsoiled) <br />Lower East No Name 33 <br />(not topsoiled) <br />Undisturbed Drainage(4) <br />Upper Flume <br />Lower Flume 80 69 <br />32 61 <br />46 74 <br /> 1835 1069 <br /> 53 725 <br /> 67 1687 <br />24 44 <br /> 40 426 <br />63 (5) <br /> 3191 521 <br />246 466 <br />1003 583 <br />Woody Stem Density (stems/acre) <br />Irrigated Non-Irrigated <br />1988 1989 1988 1989 <br />314 628 <br />314 628 <br />628 1256 <br />168 628 1256 <br />176 628 1256 <br />210 240 314 628 <br />236 628 628 <br />694 (6) 7223 <br />2552 <br />(1) Drainageways regraded, topsoiled and drill seeded in late summer 1987. <br />(2) Woody stem density comprised o[ Amelanchier alnifolia (Saskatoon Serviceberry), Crataeeus ~ (Hawthorn), Po alas aneustifolia <br />(Narrowleaf Cottonwood) Prunus americans (American Plum), Prunus vireiniana (Common Chokecherry), Ribes aureum (Golden Current), <br />Rosa woodsii (Wood's Rose), Salix vitalina (Golden Willow), and Svmohoricarnus oreophilus (Mountain Snowberry). <br />(3) Drainage segments irrigated in 1988 may not have been in 1989 due to pit dewatering activity or drying of natural springs. <br />(4) Woody stem density comprised of Amelanchier alnifolia (Saskatoon Serviceberry), Artemisia Cana (Silver Sagebrush), Artemisia tridentata (Big <br />Sagebrush), Chrvsathamnus viscidi0orus (Low Rabbitbrush), Prunus vireiniana (Common Chokecherry), uercus ag mbelii (Gambel Oak), <br />Rosa Woodsii (Wood's Rose), Svmoohoricarnus oreophilus (Mountain Snowberry). <br />(5) Samples not taken as area was severely impacted by drought and livestock grazing. <br />(6) Samples not taken as area was severely impacted by drought and livestock grazing. <br />WA/jb 1/90 [WA-HBH1] <br />