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RPM,Inc.,25049 E.Alder Dr.,Aurora,CO 80016 Phone:(303)854-7499 Email:hihumphries2 comcast.net <br /> EXHIBIT "K" <br /> 6.4.11 Climate: <br /> Following is the climatic description for ESD R048BY235 CO (Soils Unit CyF which runs the <br /> full length of the permit area: <br /> Average annual precipitation is about 16 to 20 inches.Of this.approximately 60 to 70 percent fails as snow.and 30 <br /> to 40 percent falls as rain between mid-June and the end of September.Summer moisture is mostly from <br /> thundershowers in June thru September.October,November, February and March are the driest periods of the <br /> year with the driest month being October_April.May,July,and August are the wettest periods,the wettest month is <br /> usually August. <br /> The average annual total snowfall is 137.9 inches.The snow depth usually ranges from 1 to 24 inches during <br /> October thru May.The highest winter snowfall record in this area is 228.80 inches which occurred in 1961-1962. <br /> The lowest snowfall record is 57.8 inches during the 1980-1981 winter. <br /> The frost-free period typically ranges from 12 to 65 days.The last spring frost is typically the end of June to the end <br /> of July.The first fall frost is usually the end of July to the end of August. Mean daily annual air temperature ranges <br /> from about 20.1°F to 52.9°F.averaging about 16.29E for the winter and 54.99F in the summer.Summer high <br /> temperatures of low-70°F to mid-70°F are not unusual. <br /> The coldest winter temperature recorded was-439F on January 13, 1963 and the warmest winter temperature <br /> recorded was 56°F on February 26. 1950.The coldest summer temperature recorded was 16°F on June 26. 1978 <br /> and the warmest was 92°F on July 15. 1978. <br /> Wide yearly and seasonal fluctuations are common for this climatic zone.Data taken from Western Regional <br /> Climate Center(2018)for Grand Lake 1 NW,Colorado Climate Station. <br /> This zone in MLRA 488 will need to be broken up into at multiple land resources zones in future projects based on <br /> current knowledge of precipitation and temperature patterns based on North Park-Middle Park and South Park. <br /> There are only 2 climate stations in this LRU climatic zone and they are both in middle park(Grand Lake 1 NW and <br /> Dillon 1 El.Grand Lake is on the high end of precipitation and Drfiron is on the lower end. <br /> Table 3.Ripceseenatsve climatic features <br /> !Frost-free period(characteristic range) 12-13 days <br /> I Freeze-free period;characteristic range) 55 days <br /> Precipitation total(&aracteristic range) 16-19 on I <br /> Frost-free period(actual range} 12-13 days <br /> Freeze-free period(actual range) 55-65 days <br /> Precipitation total(actual range) i <br /> 16-20 m <br /> Frost-free period leverage) 13 days <br /> Freeze-free period(average} 55 days <br /> Precipitation total(average) 17 in <br /> 61 <br />