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4.11 Climate <br />The climate at the Cresson Project is characterized by a semi -arid high mountain environment <br />with relatively short summers and longer, but moderate winters. Climatological data are <br />available from three stations: a historic station referred to as the Victor station with a data record <br />from February 1966 through February 1976, a station established by CC &V in the vicinity of <br />Bateman Creek with a data record since 1994, and most recently the Rigi station with a data <br />record since 1999. In addition, gaps within the climatic data have been filled using climate <br />records from the Western Regional Climate Center. <br />AMEC has compiled climatological data as part of the SGVLF design report in Appendix 9, <br />Volume V. The average yearly precipitation, including snowfall, is 18.9 inches. The maximum <br />mean monthly precipitation is 4.22 inches and occurs in the month of July. The minimum mean <br />monthly precipitation is 0.52 inches and occurs during the month of December. <br />The evaporation data are presented Appendix 9, Volume V of this document. The average <br />annual lake evaporation is estimated to be 44.3 inches. A maximum mean monthly lake <br />evaporation of 6.54 inches is expected in June, and a minimum mean monthly lake evaporation <br />of 2.08 inches is expected in December. <br />The average daily maximum temperatures at the Victor station ranged from a high of 71 °F in <br />July to a low of 34 °F in December and January for the period of record. The average daily <br />minimum temperature ranged from a high of 47 °F in July to a low of 13 °F in December. The <br />Bateman Creek station has, in general, shown lower overall high temperatures with an average <br />daily maximum high of 61 °F in August and low of 26 °F in January. The Bateman Creek station <br />has shown higher overall low temperatures with an average daily minimum high of 58 °F in July <br />and a low of 23 °F in January and December. Temperature data can be found in MLE, <br />Appendix 8, Volume V. <br />Wind direction is predominantly from the northwest. The second most dominant wind direction <br />is from the southwest. <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension 2 <br />4 -25 <br />