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<br />VVA..TER. <br /> <br />SLJPPL'V' <br /> <br />Historic Flows <br /> <br />An average of 2 million acre feet of water annually <br />flows out ofthe basins, Most of this water flows into New <br />Mexico. About 262,000 ac-ft of Dolores River water flows <br />into Utah. Under low flow, or drought conditions, <br />approximately 400,000 ac-ft of water leaves the basins. <br />These flows contrast with a 1997 annual water demand of <br />1.2 million ac-ft: . <br /> <br /> <br />g I. ~ ~ ~ ~ f i I <br />.s 15 LJ.. ~ i!: W I'll ii ~ <br />m. ~ ~ 8 ~ ~ z ~ <br />~ <br />Historic Average Annual Stream Flows at Division 7 Boundary <br /> <br />(Acre-feet) <br /> <br />. <br />~ <br />~ <br /> <br />The volatility of stream flows in the basins are depicted <br />in the hydro graph of flows for the Animas River near Cedar <br />Hill, New Mexico. Annual minimum flows at this gage <br />(1977) are approximately 20 percent ofthe flows for the <br />period 1934-1996. If this reduction in flows holds true for <br />the entire basin, then the anticipated drought flow would be <br />400,000 ac-ft. While the flows in the basin can readily <br />handle annual demands under normal conditions, it is <br />obvious that drought supply will be less than adequate to <br />meet the annual demand Interstate compacts of 1.2 million <br />ac- ft annually. <br /> <br />12,000 <br /> <br />10,000 <br />~ <br />j 8,000 <br />IL <br />20 6,000 <br />II <br />Ii 4,000 <br />I <br /> <br />.MaxlmLrnYear(1941) <br />_Average Dally Flow (1934w 1996) <br />_MIr1mlnlYear (1977) <br />-Exceeded 1 % of 11me <br />Exceeded 5% Of Time <br /> <br />2.000 <br /> <br /> <br />o <br />~$' ~~l> ~.; ~ti ~ ./ ~ ~~ ~tf61 ~p~ ,/ ~<;/' <br /> <br />Animas River Near Cedar Hili, New Mexico <br /> <br />Major Water Rights Holders <br /> <br />The Southwestern Water Conservation District (SWCD) <br />was created in 1941. The functions of the District include: <br />surveying existing water resources and basin rivers, <br />constructing storage, working with other water agencies <br />such as the u.s. Bureau of Reclamation (BOR), organizing <br />conservancy districts, providing for in-stream flows, and <br />other legal responsibilities. Counties represented by the <br />District include: La Plata, Montezuma, Archuleta, San Juan, <br />San Miguel, Dolores, and parts of Montrose, Hinsdale, and <br />Mineral counties. The Mancos, Dolores, and Animas La <br />Plata conservancy districts were formed under the auspices <br />of the SWCD to manage the water resources within their <br />respective river basins. <br /> <br />Interstate Compacts <br /> <br />The rivers and streams in these basins are subject to the <br />requirements of the 1922 Colorado River Compact, the 1922 <br />La Plata River Compact, the 1948 Upper Colorado River <br />Compact, and the 1969 Animas-La Plata Compact <br /> <br />Existing Stor~ge Projects and Lakes <br /> <br />Dolores Lake, Groundhog Lake, and San Juan Lake are <br />the primary natural lakes within the basin. To more <br />effectively manage the water resources of the San Juan and <br />Dolores River Basin the following water storage projects <br />were constructed: <br /> <br /> <br />Lemon Reservoir <br />Jackson Gulch Reservoir' <br />McPhee Reservoir <br />Nava'o Reservoir <br />Vallecilo Reservoir <br /> <br />Florida River <br />Mancos River <br />Dolores River <br />Nava" River <br />Pine River <br />Los Pinos) <br /> <br />BOR <br />BOR <br />BOR <br /> <br />40,240 <br />10,000 <br />750,000 <br /> <br />129,675 <br /> <br />BOR <br /> <br />Red Mesa Ward Reserv<>l <br />Pania Reservoir <br />Smith Fori< Reservoir <br />Total Capacity <br /> <br />1,176 <br /> <br />Diversion and Transmountain Projects <br /> <br />To be added <br />