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K-1 <br /> EXHIBIT K <br /> CLIMATE INFORMATION <br /> Per Rule 6.4.11—Climate.Provide a description of the significant climatological factors for the locality. <br /> The climate over the plains of eastern Colorado generally exhibits abundant sunshine, moderate to high <br /> wind, low relative humidity, a large daily range in temperature, and little precipitation. About 60 to 80 <br /> percent of the annual precipitation falls as rain during April to September, primarily from thunderstorms <br /> (USGS, 1995). <br /> The region surrounding the project area averages an annual high temperature of 68.8°F and an annual low <br /> temperature of 36.7°F. Summer temperatures during July and August average 94°F and 91°F,respectively. <br /> Winter temperatures during January and February average 46°F and 50°F,respectively.The average annual <br /> temperature is 52.75°F. <br /> Average annual precipitation is 14.67 inches. Average annual snowfall is 41 inches. May is the rainiest <br /> month, averaging 2.4 inches of precipitation. March receives the most snowfall on average,with 8 inches, <br /> followed by November with 7 inches. <br /> Pan evaporation data is available from a station located seven miles southwest of Wiggins (which is <br /> approximately 27 miles northeast of the Project location)for the period 1960 to 1971. The average annual <br /> pan evaporation is 54.12 inches, occurring primarily during the months of: April(6.82 inches); May(8.50 <br /> inches); June (8.42 inches); July (9.97 inches); August (8.09 inches); September (5.87 inches); October <br /> (4.22 inches); and, November (2.23 inches). The mean annual evapotranspiration for Weld County is <br /> between 31 and 40 cm per year; or, 12.2 to 15.7 inches per year, yielding a ratio of evaporation to <br /> precipitation of as much as 1.09:1. <br /> Prevailing winds are generally from the southwest, as demonstrated by the wind rose data depicted in <br /> Figure K-1: Wind Rose—Keenesburg No. 2 Mine. This wind rose reflects full-year data compiled in <br /> 2009 for an unrelated location approximately 20 miles west-northwest of the proposed Keenesburg No. 2 <br /> Mine; and,represents the geographically-closest and most recent data determined to be available by CSC. <br /> Keenesburg No.2 Mine-112 Reclamation Operation—November 22,2019 <br />