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<br />u <br />u <br />u <br />u <br />u <br />n <br />H <br />n <br />U <br />ti <br />D <br />ti <br />'ti <br />. <br />I. <br />, <br />. <br />I <br />m <br /> <br />.0 <br />0') <br />w <br />,... <br /> <br />- <br /> <br />-206- <br /> <br />372,000 Mgm/yr or a reduction of approximately 43 mg/l at <br />Imperial Dam (USDI, BR, 1979a). Tables 2-2 and 2-3 describe <br />the canal and lateral characteristics of the Grand Valley <br />area. Table 2-4 presents the optimization parameters for <br />the Grand Valley canals. <br />An initial phase of the water systems improvement <br />portion of this project, known as Stage One, is to be con- <br />structed in FY198l in a study on the western end of the <br />valley. A portion of the Government Highline Canal would be <br />lined, and the laterals lined or placed in pipe to reduce <br />seepage. A wildlife area and watering ponds will be pro- <br />vided by the WPRS to compensate for wildlife habitat losses <br />resulting from implementation of the total program. <br />Stage One is being constructed with an extensive moni- <br />toring network to quantitatively determine the project <br />effects on reducing salinity and damages to wildlife. The <br />results from Stage One will be thoroughly evaluated before <br />deciding to proceed with the rest of WPRS program. This <br />initial phase is projected to decrease the salinity concen- <br />tration at Imperial Dam by 2.5 mg/l by the reduction of <br />21,800 Mgm of salt from the river. Approximately 11 kilo- <br />meters of canal and 49 kilometers of laterals will be lined. <br />The construction bids for Stage One canal lining were opened <br />in June, 1980, and the cost will be $7.4 million. <br />The Grand Valley is the site of a sizeable on-farm <br />water management improvement program for salinity control. <br />The SCS is participating on lateral improvements outside of <br /> <br />'i_ <br />