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<br />(;L:oil9 <br /> <br />flows are supplemented by 1.7 million acre-foot storage releases from <br />Navajo Reservoir. <br /> <br />" <br />\ <br /> <br />Water for the Project is diverted by the Hammond Diversion Dam located <br />about 2 miles upstream from Blanco and 13 miles downstream from Navajo <br />Reservoir. The diverted water is conveyed by the 27-mi1e-long Main Canal <br />westward along the south side of the river valley. The capacity of the canal <br />varies from 90 cubic feet per second (ft3/s) at the headworks to 5 ft3/s at the <br />tenninus. The capacity of the laterals varies from 3 ft.3/s to 12 ft.3/s. <br /> <br /> Table S-1.-Hammond Project <br /> Present condition of canal system <br />Main Canal Miles East Hig-hline Lateral Miles <br />Unlined 9.66 Unlined 1.48 <br />Earth-lined 9.86 Earth-lined 0.82 <br />Concrete-lined 4.50 <br />Siphons 2.93 <br />Total miles 26.95 Total miles 2.30 <br /> ) <br />Gravity Extension Lateral Miles West Hi"hline Lateral Miles <br />Unlined 3.68 Unlined 0,97 <br />Earth-lined 0.26 <br />Concrete-lined 0.62 Concrete-lined 2.21 <br />Siphons 0.15 Siphons 0.06 <br />Total miles 4.71 Total miles 3.24 <br /> <br />NEED FOR ACTION <br /> <br />At its headwaters in the mountains of north-central Colorado, the Colorado <br />River has a salinity concentration of 50 milligrams per liter (mg/L). The <br />concentration progressively increases downstream as a result of water <br />diversions and salt contributions from a variety of sources. Annual salinity <br />concentrations at Imperial Dam are estimated to increase from the 1987 <br />measured average level of 850 mg/L to an average of 970 mg/L by 2010 <br />unless additional control measures are implemented to prevent the salinity <br />increase. <br /> <br />8-2 <br />