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<br /><:;) <br /><:;) <br />~~~ (It <br />~,~~':' "'.4 <br /> <br /> <br />MONITORING AND EVALUATION PROGRAM <br />1881 ANNUAL REPORT <br /> <br />I. INTRODUCTION <br /> <br />1. Overview <br /> <br />This report has been prepa~ed as an annual status ~epo~t to present <br />the ~esults of the 1991 monito~ing and evaluation activities in <br />vari ous di sc i p lines. Annua I repo~ts have been prepared and presented <br />since 1985. These annual reports provide information on data base <br />collected since the Monitoring and Evaluation <M&E) program began in <br />1984. This prog~am was implemented under the Colorado River Basin <br />Sal in i ty Contro I Act of 1974 <Pub Ii cLaw 93-320). The Act was <br />establ ished to enhance and protect qual ity of water in the Colorado <br />River through sal inity control. Implementation of the U.S. Department <br />of Agriculture <USDA) Grand Valley Sal inlty Program began in 1979. <br /> <br />~''''~'' <br />'.".':<:" <br />'4~';t. <br /> <br />The monitoring program was designed to evaluate the impacts of <br />sal inity practices due to the USDA Sal inity Control Programs in the <br />Grand Valley project area <Figure 1>. The effects of irrigation, <br />practices on salt load reduction, economics, wi Idllfe habitat and soi ,_ <br />sal inity levels have been evaluated annually on selected fields as <br />outlined In the 1983 USDA Monitoring and Evaluation Plan. Monitoring <br />wi I I be continued for several years to determine the long-term impacts <br />of improved sal inity practices. <br /> <br />The 1983 USOA Monitoring and Evaluation Plan is being replaced with a <br />draft "Framework Plan for Monitoring and Evaluating the Colorado River <br />Sal in i ty Contro I Program" pub I i shed on June 23, 1981. Th i s document <br />outl ines the scope,methodology, and report format to be fo/ lowed by <br />a/I sal inity project offices. In the Grand Valley project area this <br />framework plan wi II be followed where possible without disrupting <br />current program format which has been implemented for more than seven <br />years. <br /> <br />2. Project Location <br /> <br />The Grand Valley Project Area is located along the Colorado River in <br />West Mesa County in West Central Colorado <Figure 1) near the <br />Colorado-Utah State I ine. Communities located in the Grand Val ley <br />area are - Grand Junction, Pal isade and CI if ton to the east; Fruita, <br />Loma and Mack on the west end. <br /> <br />The Grand Val ley is underlain by Mancos shale formation and coverS <br />about 126,000 acres, of which 66,000 acres is irrigated cropland. <br /> <br /> <br />1 <br />