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• iii iiiiiiiiuiii iii • <br />999 <br />EXHIBIT K <br />• CLIMATE <br />Climatological scale records (20 year minimum) of precipitation and temperatures do not <br />exist at the site of the Mesa Gravel Pit. However, a National Weather Service Station <br />with climatological scale records is operated in the city of Hayden, Colorado, <br />approximately 4.2 miles to the west-northwest of the Mesa Gravel Pit (see Exhibit B). <br />The Mesa Gravel Pit is located at an elevation of approximately 6,600 feet (MSL) and the <br />Hayden weather station s sited at a similar elevation of 6,375 feet (MSL) (National <br />Oceanic and Atmospheric Administration, 1980). Further, the Hayden weather station <br />and the Mesa Gravel Pit are both located in the Yampa River drainage basin. <br />Because the Hayden Station is located near the Mesa Gravel Pit and is characterized by <br />similar terrain and elevation, it is believed that the Hayden Station climatological records <br />should closely represent conditions at the Mesa Gravel Pit site. Therefore, the following <br />information on temperature (55 years of record) and precipitation (61 years of record) <br />• from the Hayden Station, Hayden, Colorado (National Oceanic and Atmospheric <br />Administration, 1980) are provided as a reasonable representation at site climatic <br />conditions. <br />Table K-1 presents the "Average Temperatures and Departures From Normal" by month <br />for the year 1980. The difference of each monthly temperature and the departure form <br />normal for that month, yields the fifty-five (55) year average temperature for that month. <br />Table K-2 presents the "Total Precipitation and Departures From Normal" by month for <br />the year 1980. Subtracting each month's departure form the respective month's <br />precipitation, yields the sixty-one (61) average precipitation for that month. <br />• <br />K-1 Revised May 1998 <br />