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-3- <br />- 2. Streamflow <br />Table 2 is a regional summary of the streamfloe+ characteristics of six <br />watersheds in the White River basin that vary from 59.4 to 762 square miles <br />in size. Runoff is generally least in January through March and highest in <br />May and June. Approximately 75 percent of the annual flow occurs during the <br />_ snowmelt runoff season (April-July). Rainfall that occurs during peak snowmelt <br />can produce extreme flows. Subsequent rainfall during summer and fall does not <br />produce significant quantities of streamflow, <br />The data summarized in Table 2 are representative of the streamflow <br />characteristics in the vicinity of Rienau Mine. All of the data were collected <br />. from continuously flowing streams. <br />As seen in Figure 1, annual runoff correlates well with average watershed <br />elevation. below approximately 8,000 feet m.s.l., much of the precipitation <br />is consumed by vegetation and absorbed by the soils, rather than flowing from <br />the valley as runoff. Hov+ever, at elevations above 10,000 feet, annual water <br />yields average more than 1,200 acre-feet per square mice. <br />Table 2 - Regional Streamflow Summary, White River Drainage Basing <br />Drainage ~ Elevation Average Annual <br />Station Name Area (mi.2) (r*.. m.s.l.) Water Yield <br />acre-feet a-r/mi~- <br />Marvine Creek near Buford 59.4 7,500 78,250 1,317.34 <br />North Fork 4lhite River ate 254 7,010 226,000 889.76 <br />Buford <br />South Fork White River 157 7,430 189,800 1,208.92 <br />near Buford <br />South Fork White River at 170 6,970 184,700 1,086.47 <br />Buford <br />4lhite River above Coai 660 6,400 405,000 613.64 <br />Creek near !leeker <br />White River near Meeker ~ 762 6,300 450,600 591.34 <br />- ZSource: U.S. Dept. Interior (1414). <br />