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.~ ~~ Duchesne River drainage. As a result of these and many other diversions and dams, the Duchesne River is a heavily depleted stream system. Maddux et al. (1993) reported that fifty-three percent of the water from the Duchesne River is depleted through water diversions and 'impoundments. Today, additional reservoirs and canals are being proposed to be built for within basin purposes as part of the Central Utah Project. Annual mean flow is greater near Randlett than at Myton because of the contribution of the Uinta River. For the period of overlapping gaging records since 1943, annual runoff is sometimes more than 250 hectometers (200,000 of/yr) greater near Randlett than at Myton. In drought years, however, the annual runoff at both gaging stations has been nearly the same (Fig. 3A). Periods of higher annual runoff have occurred between 1940 and 1950, 1965 and 1970, and 1980 and 1985. The average annual runoff since 1940 has been about 350 hectometers (300,000 of/yr) at Myton and 500 hectometers (400,000 of/yr) near Randlett. Gaging at Myton began in 1912, and average annual runoff for the period 1910 to 1920 was about 700 hectometers (600,000 of/yr) of which is approximately twee the current runoff. The magnitude of the annual maximum flood is atso greater near Randlett than at 300o C~ ?~-oo ck-i Myton. The 2-yr recurrence flood is about 85 m'/s at Myton and is 105 m'/s near Randlett for the period 1943 to 1994 (Fig. 4). However, flood magnitudes were greater earlier in the twentieth century, and the magnitude of floods is slightly larger for the entire period of record at Myton. The time series record of annual floods (Fig. 3B) shows that the periods of high annual runoff and large floods are the same. Large floods near Randlett are typically much larger than at Myton, but small annual floods are 13