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<br />Water samples will be taken at scheduled intervals both above and <br /> <br /> <br />below the discharge point on the Rio Grande to evaluate the contributions of <br /> <br />project water relative to existing conditions within the river as shown in <br /> <br />Table 1. <br /> <br />All water quality records will be maintained by Reclamation. <br /> <br />Rio Grande Compact water quality data will be reported on a monthly and annual <br /> <br />basis in the water accounting reports. <br /> <br />(2) Drawdown Requirements <br /> <br />Public Law 92-514 as amenaed states: <br /> <br />"The Secretary shall operate project facilities in a manner that <br /> <br />will not cause the water table available for any irrigation or domestic wells in <br /> <br />existence outside the project boundary prior to the construction of the project <br /> <br />to drop more than two feet and in a manner that will not cause reduction of <br />artesian flows in existence prior to the construction of the project." <br /> <br />Ground water levels in the Closed Basin and adjacent areas of the <br /> <br />San Luis Valley have been monitored by the United States Geological Survey <br /> <br /> <br />(USGS), RGWCD and Reclamation. Some of the data available preceeds the ini- <br /> <br />tiation of work on the Closed Basin Division. Information collected forms the <br /> <br />data base for historic ground water levels. Ground water levels in the area are <br /> <br />affected by climatic conditions, the amount of irrigation pumping, seasonal <br /> <br />effects of evapotranspiration and other factors. <br /> <br />{, .......... It /~ 'I <br />',; '.. .... t.1 of.;.. () <br /> <br />A data base of ground water level information at more than 300 <br /> <br /> <br />observation wells in the San Luis Valley has been established by the above named <br /> <br />entities through monitoring of the observation wells at regular intervals over <br /> <br />16 <br />