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<br />. <br /> <br />. <br /> <br />,) {l1'C.":; <br />. ...0",., <br /> <br />WATER RESOURCES OF EL RIO DE LOS PINOS <br /> <br />The waters of a plethora of nameless tributaries, Rincon <br /> <br /> <br />la Vaca, and the North Fork of Los pinos River coalesce in an <br /> <br /> <br />alpine meadow high in the Southern San Juan Mountains to form the <br /> <br /> <br />Rio de Los Pinos. From these headwaters, some 35 miles northwest <br /> <br />of Pagosa Springs, Colorado, the river flows in a southwesterly <br /> <br /> <br />direction to Columbus, Colorado, and then straight south toward <br /> <br /> <br />Navajo Reservoir, ending 12 miles above its former junction with <br /> <br /> <br />the San Juan River. <br /> <br /> <br />A stream gage maintained by the U. S. Geological Survey from <br /> <br /> <br />the years 1938 through 1954, high in the drainage below Snowslide <br /> <br /> <br />Canyon, determined that the average discharge was 34.5 cfs, or <br /> <br /> <br />24,980 AF annually. <br /> <br /> <br />NO gage was ever maintained at the lower end of the study <br /> <br /> <br />segment; however, from 1928 until 1940. the pine River gage, about <br /> <br /> <br />2~ miles below the present site of Vallecito Reservoir, recorded <br /> <br /> <br />stream flows before the construction of the reservoir. The average <br /> <br /> <br />flow for this time period was 345 cfs, or 249,780 AF annually. <br /> <br /> <br />This figure includes the flows of Vallecito Creek. In order to <br /> <br /> <br />make a fair estimation of the flows in Los pinos River in the study <br /> <br /> <br />area, the flows of Vallecito Creek must be subtracted. NO gage <br /> <br /> <br />existed on Vallecito Creek until 1963. Therefore. the attached <br /> <br /> <br />hydrograph was protracted from the flows of Vallecito Creek sub- <br /> <br /> <br />tracted from the monthly inflow at Vallecito Reservoir obtained <br /> <br /> <br />from U. S. Bureau of Reclamation records. <br /> <br />" <br />