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L <br />For this eight-year period, the winter season (December -February) <br />precipitation average was 1.32 inches while the spring season (March -May) <br />average was 3.20 inches. Summer (June -August) and fall (September -November) <br />average precipitation were 2.53 and 2.21 inches, respectively. <br />Tables II.E-2 and Table II.E-3 present the joint frequency distribution and <br />relative joint frequency distribution of wind speed and direction from the <br />White River Shale Project (Us and Ub oilshale tracts) located in Utah near <br />the town of Bonanza. Bonanza is the nearest station that records wind data <br />and is approximately 25 miles southwest of the mine. This data was <br />collected at ten meters by Aerovironment for the five-year period (1975 <br />through 1979). The mean annual wind speed was 7.2 miles per hour (mph). • <br />There is no available data on gusts, but 3 percent of the wind speed <br />occurrences are greater than 35 mph, mainly in the west-southwest (WSW) and <br />south-southeast (SSE) directions. Figure II.E-1 is the annual wind rose for <br />the White River Shale Project for 1978 at the 30 -meter level. The <br />prevailing wind direction is SSE. The data from the 30 -meter level is more <br />representative of the Rangely area than the 10 -meter level. Influences on <br />the data due to terrain are less at 30 meters than at 10 meters. Currently, <br />no data is available from the on-site meteorological station due to problems <br />with a power supply. Collection of the meteorological data, reinitiated in <br />June 1980, will continue for 12 calendar months. This data will be <br />available upon request. <br />M • iF Ii iF <br />10-80 II.E-4 <br />