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<br />EXHIBIT K - CLIMATE <br />Climatic data for the Durango area, located approximately <br />13 miles to the north of the gravel pit is given here. The <br />period of record is from 1951 to 1970, and the data was obtained <br />from Colorado Monthly Temperature and Precipitation Summary <br />for Period 1951- 1970, by John F. Bensi and Thomas B. McKee, <br />published by the Department of Atmospheric Science, Colorado <br />State University, Fort Collins, Colorado. <br />The mean annual temperature is about 48.6°F. The mean <br />minimum January temperature is about 10.9°F.; the mean maximum <br />January temperature is about 42.5°F. In July, the mean minimum <br />temperature is about 44.5°F and the mean maximum temperature <br />is about 86.6°F. The seasonal temperature ranges from the 90°'s <br />to a low in the -20°'s. <br />The mean annual precipitation is about 18.6 inches. About <br />70~ of the precipitation falls between April 1st and September <br />30th as a result of spring snow and summer storms. Snow during <br />the spring months can amount to a significant amount of moisture <br />in some years. Snow falling on this area melts early, <br />encouraging the growth of cool season grasses. <br />The frost-free period ( daily minimum temperature higher <br />than 32°F ) averages about 122 days in length; the growing season <br />for native plants is March through September with the optimum <br />growing season in the early spring and summer months. <br />