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• <br />TABLE 2.04.10-2 <br />MONTHLY AVERAGE TEMPERATURES WITH MAXIMUM/MINIMUM <br />VALUES FOR THE MONTHS JANUARY THROUGH OCTOBER, 1987 <br />RECORDED AT THE URAVAN, COLORADO STATION <br /> TEMPERATURE 1°F) <br />MONTH AVERAGE AVERAGE MAX. AVERAGE MIN. <br /> 1987 1999 1987 1999 1987 1999 <br />January 26.7 34.6 39.8 49.7 13.5 19.5 <br />February 36.5 37.9 48.2 54.3 24.8 21.4 <br />March 40.5 47.5 54.1 67.1 26.8 27.9 <br />April 54.1 45.8 71.5 60.9 36.6 30.7 <br />May 60.9 75.7 46.0 <br />June 74.1 92.0 56.2 <br />July 75.1 94.3 55.8 <br />August 72.8 89.0 56.6 <br />September 65.0 64.7 45.3 <br />• October 56.2 74.8 37.5 <br />Source: NOAA 1987. <br />Vegetation and Land Use Overview <br />The natural vegetation occurring in the Nucla area has been described by Kuchler (1964) as the Juniper- <br />Pinyon Woodland Type and the Great Basin Sagebrush Type, while Brown, et al. (1980) classified the <br />natural vegetation communities as the Pinyon-Juniper Series of the Great Basin Conifer Woodland Biome <br />and the Sagebrush Series of the Great Basin Desertscrub Biome. While these natural vegetation types <br />are obvious in the surrounding undisturbed native rangelands, over 100 years of intensive agriculture on <br />First Park has resulted in only scattered remnants of these native vegetation types in areas where soils <br />are too shallow or irrigation water could not be applied. Prior to agricultural conversion sagebrush <br />shrublands occupied the park-like areas with deeper soils and more gentle slopes while the more broken <br />upland areas with shallow coarse textured soils were occupied by the pinyon-juniper woodlands. Since <br />deeper soils are common in the study area, the sagebrush shrubland was probably the predominant <br />. (REVISED 8!15100) 2.04.11) - 6 <br />