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Exhibit K: Climate Information <br /> The following climate information is presented for Revenue Mine. The data available was from <br /> the Ouray Number 2, Colorado weather station operated for the High Plains Regional Climate <br /> Center of the National Oceanic and Atmospheric Association (NOAA). The Revenue Mine is <br /> located at an average elevation of 10,680 feet, while the Ouray weather station is at an elevation <br /> of 7,718 feet. An analysis of the temperature maps for Colorado (Figures K-2A through K-2C) <br /> shows that the temperatures measured in Ouray are close enough to those at the mine to use as <br /> the mine climate. The same cannot be said of precipitation. For the weather station, the average <br /> annual precipitation is 17.0 inches (Table K-1). For the Revenue Mine area, the average <br /> precipitation was calculated to be approximately 40 inches. <br /> The annual precipitation of 40 inches per year was gathered from a map produced by the United <br /> States Department of Agriculture Natural Resource Conservation Service and is shown in Fig K- <br /> 1. The average monthly precipitation was calculated by a ratio average annual precipitation (40 <br /> inches per year) at Revenue Mine to the average annual precipitation (17 inches per year) of the <br /> Ouray, Colorado, station multiplied by the average monthly precipitation for the Ouray, <br /> Colorado, station. <br /> The average evaporation for the Revenue Mine is approximately 35 inches per year. (See Figure <br /> K-3). <br /> Table K-1. Ouray, Colorado,Weather Station (2020) <br /> Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual <br /> Average <br /> Max. 35.9 37.9 47.5 56.1 69.9 77.1 79.7 83.4 71.8 63.9 48.8 35.2 58.9 <br /> Temp <br /> Average 15.3 16.8 28.5 30.7 40.9 47.7 53.3 55.9 44.3 34.2 26.0 13.8 34.0 <br /> Min. Temp <br /> Average <br /> Mean 25.6 27.4 38.0 43.4 55.4 62.4 66.5 69.6 58.0 49.1 37.4 24.5 46.4 <br /> Temp <br /> Average <br /> Total 1.76 0.75 1.48 1.30 0.57 1.28 2.54 0.87 1.29 0.80 2.52 1.85 17.0 <br /> Preci <br /> Notes: <br /> Temperature is in Fahrenheit. <br /> Precipitation is in inches. <br /> Revenue Mine <br /> December 2021 K-1 <br />