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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />n6^'" <br />.j (-}, <br /> <br />salinity concentration at Imperial Dam by 18.2 mg/l. The <br />estimated cost is $30,000,000 and would yield a <br />cost-effectiveness of approximately $175,000 per mg/l. <br /> <br />Impacts <br /> <br />A major impact associated with the project is the <br />consumption of 1500 acre-feet of water. Under Colorado water <br />law, it is uncertain whether the consumption of the saline water <br />by reiniection i8 conRidere~ a heneficial use. However, the <br />Bureau of Reclamation is in the process of demonstrating that <br />additional land could be irrigated once the project begins <br />removing the salt from the river. This project would allow <br />irrigation durinq late summer when historically, flows are low <br />and water quality poor. <br /> <br />Another impact would involve the continuing costs of <br />operating and maintaining this project. The federal government <br />would be responsible for this cost, but the magnitude is unknown <br />at this time. <br /> <br />Sinbad Valley Unit <br /> <br />Sinbad Valley is located on a tributary to the Dolores River <br />just upstream of the Utah-Colorado stateline. Salt Creek is a <br />small ephemeral stream that drains Sinbad Valley and is fed by <br />several saline springs. The Bureau of Land Management has <br />conducted a preliminary Rtudy of. the project area and has <br />concluded that a barrier dam would be needed to capture the <br />saline groundwater as well as the surface flow. The saline water <br />would be pumped from the barrier dam to four evaporation ponds <br />located nearby. The project would remove 7,000 tons of salt, <br />consume up to 160 acre-feet of water from the Dolores River, and <br />reduce the salinity concentration at Imperial Dam by 0.7 mg/l. <br /> <br />-13- <br />