2011-11-22_PERMIT FILE - M2011054

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Exhibit K - Climate Paul Banks and Associates, LLC The Grand Valley, Colorado (near Parachute) monthly climate summary is provided in the following table: Grand Valley station, Period of Record: 5/1/1965 to 5/31/1981 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average Max. 36.9 45.9 55.3 65.3 75.8 87.0 94.1 91.0 82.0 68.7 51.9 39.3 66.1 Temperature (F) Average Min. 10.8 17.9 25.7 32.3 40.9 48.6 56.3 53.3 44.0 33.1 22.9 13.0 33.2 Temperature (F) Average Total 0.96 0.81 1.14 0.97 1.35 0.89 0.81 0.94 1.19 1.29 1.01 1.12 12.47 Precipitation (in.) Average Total 11.7 4.7 1.9 0.7 0.1 0.0 0.0 0.0 0.1 0.3 2.7 11.4 33.6 SnowFall (in.) Average Snow 4 3 0 0 0 0 0 0 0 0 0 2 1 Depth (in.) Data from High Plains Regional Climate Center: hprcc.unl.edu Note: Climate data for Debeque, Colorado is not available, so data is presented for the closet station with available information. The site is located approximately 15 miles south and west of the Grand Valley meteorological station. Given the relatively short data period for the above station, data are presented below for a 1910 to 2005 collection period at Rifle, Colorado, corroborating the general climate trends for this part of the Colorado (Grand) River valley. Average Max. Temperature (F) Average Min. Temperature (F) Average Total Precipitation (in.) Average Total SnowFall (in.) Average Snow Depth (in.) Rifle station, Period of Record: 9/9/1910 to 9/30/2005 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 36.8 43.8 53.7 64.2 74.0 84.0 90.2 87.6 79.4 67.3 51.4 39.4 64.3 9.4 16.5 24.2 31.4 38.7 45.2 52.0 50.4 41.4 31.1 21.3 12.4 31.2 0.86 0.77 0.95 1.02 1.00 0.73 1.02 1.13 1.11 1.20 0.89 0.93 11.61 11.1 7.7 3.7 0.8 0.0 0.0 0.0 0.0 0.0 0.5 3.8 11.1 38.6 4 3 0 0 0 0 0 0 0 0 0 2 1 Debeque Sand and Gravel Resource 11019 Oldcastle Southwest Group, Inc. 21 November 2011