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EXHIBIT K <br />Climate <br />The Site has a high plain, continental climate. With the mountains to the west, variations in <br />temperature are wide. The average annual temperature is lower than in the high plains, and <br />the temperature increases from east to west in the plains area. Average annual precipitation <br />also increases from east to west. In the high plains azea, rainfall is light and humidity is <br />low. <br />Differences in altitude and exposure create great variations in both temperature and <br />precipitation. In general, temperatures are cooler at higher elevations, and northern <br />exposures are cooler than southern exposures. The average frost-free period ranges from <br />225 to 270 days. Annual precipitation ranges from about 13 to 24 inches and increase with <br />elevation. <br />In the eastern high plains azea, the climate is modified considerably from that expected of a <br />typical high plains because of the nearby mountains to the west. The winds chazacteristic <br />of the plains are reduced somewhat by the shielding effect of the mountains. <br />Climate data for the site is assumed to be similar to that of a weather station 3 miles south <br />in Brighton, CO. The Western Regional Climate Center tracks temperature extremes and <br />precipitation data for this station. The following tables were based on data collected during <br />the period beginning October 1, 1973 and ending December 31, 2003. <br /> Av .Max. Tem erature Av .Min. Tem erature <br />Janua 43.00 14.50 <br />Februa 47.40 18.70 <br />March 55.20 25.60 <br />A ril 63.60 33.40 <br />Ma 72.70 42.80 <br />June 83.40 5 L60 <br />Jul 89.20 56.80 <br />Au ust 86.70 55.00 <br />Se [ember 78.90 45.90 <br />October 67.40 34.20 <br />ovember 51.60 23.10 <br />December 44.40 15.90 <br />Annual Avera e 65.29 34.79 <br />F7. Lupton Pi( <br />OMG U1 Permit <br />Page 57 of 81 <br />