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<br />Similarity between the reference area and the tie across haul road area was also <br />evaluated by calculating a similarity index between the two areas. This was approxi- <br />mately 81 percent, which is a very high level of similarity for two distinct areas of the <br />same vegetation type. <br />CONCLUSIONS <br />C~ <br />The mixed sagebrush vegetation growing on both the realigned tie acros haul road <br />study area and the reference area is characteristic of sagebrush vegetation growing in <br />this part of western Colorado. The species composition, cover, production and shrub <br />density value fall within the range of values one would expect to encounter in this vege- <br />Cation type. <br />Based on statistical evaluation of the cover and production data, the mixed sage- <br />brush reference area is essentially the same as the native vegetation growing along the <br />realigned tie across haul road proposed route and will be more than adequate for use in <br />the future evaluation of revegetation success. <br />LITERATURE CITED <br />Sorenson, T. 1948. A method of establishing groups of equal magnitude in plant <br />sociology based on similarity of species content. Act. Kong. Danska Vidensk., <br />Selsk. Biol. Skr. J., 5:1-34. <br />• <br />