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v' <br />Results <br />In areas of good soil on the upper part of this slope a very <br />good stand of slender wheatgrass is established (Photograph 24 ). <br />In other areas of the upper part of this slope the soils are poor <br />and a thin stand of grasses has resulted. Photographs 25 and 26 <br />showing the lower portion of the slope were taken in the fall of <br />1980 and in ,trine of 1981, respectively. The cover m this portion <br />of the slope is 50-60% and is composed of slender wheatgrass, <br />western wheatgrass, smooth brome, Indian ricegrass, aid inter- <br />mediate wheatgrass. <br />Survival of the Native Plants tubelings is no higher than <br />5%. In areas of poor grass ground cover on the upper slope, a few <br />oaks and currants are surviving. Otherwise, in areas of good <br />grass cover there is no evidence of shrub tubeling survival. <br />Recommendations <br />The Northern 1fl mine complex has now been fenced to eIimi- <br />nate grazing problems so the m ly recommendation is the addition <br />of a high nitrogen fertilizer in the spring. The addition of the <br />fertilizer is especially important to the upper slopes where soil <br />fertility is noticeably poor. The lower slope can get by with a <br />much lower rate of fertilization which can be eliminated in me or <br />two years. <br />Diversion Ditch Above Portal <br />Physical Characteristics <br />This diversion ditch slopes gradually from its south end to <br />a point above the portal area and then drops steeply to the sedi- <br />ment ponds below. The south end was cut across the steep hillside <br />of the FF seam search area. Where the ditch cuts across this hill- <br />side both the ins lope and-outslope are very steep and average <br />approximately 30 feet in length. On the remainder of the ditch <br />the inslope and outslope are not as steep nor as long. The plant <br />growth medium is a mixture of rock, subsoil, and a Iittle topsoil. <br />Implementation <br />mix: <br />This ditch was seeded in October of 1979 with the following <br />Western Wheatgrass 8 <br />Slender Wheatgrass 8 <br />Streambank Wheatgrass 2 <br />Intermediate Wheatgrass4 <br />Sherman Big Bluegrass 2 <br /> <br />