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<br />~.. '. <br /> <br />DOLORES RIVER FLOOD HAZARD INFOR'IATIDN STUDY <br />ABOVE DOLORES, COLORADO <br /> <br />PURPOSE <br />---- <br /> <br />Th1.s report presents hydrologic data for Dolores RIver at 1.ndex <br /> <br />po1.nt locations of (1) Dolores River below tbe confluence of Stoner Creek; <br /> <br />(2) West Dolores River at mouth; (3) Dolores R:l:,er belo", confluence of <br /> <br />Lost Canyon Creek; and (4) Lost Canyon Creek at mouth. Figure 1 shows a <br /> <br />general map of the Dolores River basin above Dolores, Colorado and the <br /> <br />locations where discharge frequency relationships and flood hydrographs <br /> <br />were developed. <br /> <br />DESCRIPTION OF STUDY AREA <br />,------- -- <br /> <br />The Dolores River is a tributary of the Co.::.orado River ill the upper <br /> <br />Colorado River Basin. Its headwaters are in the San Higuel and La Plata <br /> <br />mountains of the San Juan Range. These mount,,,ins reach elevations of <br /> <br />'more than 13,000 feet above sea level where senne bare rock is exposed, <br /> <br />but considerable depths of alluvium fill the canyons. Huch of the area <br /> <br />1.s timbered with pine, fir, and spruce, and then~ is considerable brush <br /> <br />in the lower elevations. The average stream slope is approximately 60 <br /> <br />feet per mile. <br /> <br />The principal industries in the study area are mining, stock <br /> <br />ralsing, and a small amount of farndng. High,",,)' 145 is the ma1.n artery <br /> <br />from the to,,'Il of Dolores (elev. 7,000 feet) up <<long the Dolores JUver <br /> <br />and through the Dolores basin, with only a fel-! secondary roads joIning <br /> <br />:it. There are no ra1.lroads in the study are.~" <br /> <br />\ ' <br />