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<br /> <br />tributaries, the Green and Dolo- <br />of the San Juan study area. The <br />San Juan River, another <br />tributary of the Colo- <br />rado, flows through the <br />southern part of the <br />area. These four are the <br />only streams ~ithin or <br />bordering the area large <br />enough to be named "riv- <br />ers. " Because most of <br />the sections of these <br />rivers are entrenched in <br />deep canyons, their wa- <br />ters are generally inac- <br />cessible to places of <br />need. Creeks originating <br />within the study area in <br />the La Sal and Abajo <br />Mountains provide most <br />of the water presently <br />used. <br /> <br />(lDj:ClS <br /> <br />. <br /> <br />CHAPTER V <br /> <br />WATER RESOURCES <br /> <br />Water SuPPly <br /> <br />The Colorado River and two of its <br />res Rivers, form much of the boundary <br /> <br />. <br /> <br /> <br />;, . <br /> <br />.- <br />11 <br />, <br /> <br />.. <br />- " <br /> <br />- <br /> <br />River flows <br /> <br />River flows vary <br />widely from season to <br />season and to a lesser <br />extent from year to year. <br />They are affected by up- <br />stream diversion and <br />storage developments, a <br />number of which have <br />been constructed in re- <br />cent years or are now in <br />progress 8S units of the <br />Coloradtr River Storage Project or participating projects. Average annual <br />flows at certain points on each of the four rivers are shown in the fol- <br />lo~ing table. The gage locations are shown on the map on page 45. <br /> <br />. <br /> <br />43 <br />