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<br />002024 <br /> <br />~. <br />~",:,. <br />-. <br /> <br />. <br /> <br />ponding Tests and seepage Rate Determinations <br /> <br />General <br /> <br />Ponding test sites Were selected on the Hogback and Upper <br />Fruitland Canals in consultation with the Bureau of Indian <br />Affairs (BIA) in Shiprock, New Mexico and the Bureau of <br />Reclamation in Durango Colorado. Four sites on the Hogback Canal <br />and two sites on the Upper Fruitland Canal were selected. sites <br />were selected to be representative of the different zones through <br />which the canals pass, such as cut and fill zones, and the <br />different lining conditions of the canals, such as concrete lined <br />or nonconcrete lined. Each of the test sites selected on the <br />Hogback Canal were located in balanced cut and fill excavations. <br /> <br />Hogback Canal <br /> <br />. Test site Selection <br /> <br />The first test site on the Hogback Canal is located 1 mile <br />downstream from the San Juan River Diversion and extends <br />downstream approximately 1600 feet (Photograph 1). This site, an <br />unlined section of canal, is located parallel to a field that has <br />drainage problems (Photograph 2). The second test site is <br />located 2.7 miles east of the town of Ship rock and <br />extends downstream approximately 1400 feet (Photograph 3). This <br />site was at one time lined with an asphalt paper membrane which <br />is presently in an advanced stage of deterioration. The third <br />test site on the Hogback Canal is located 0.2 miles west of <br />Highway 666 and extends downstream approximately 1520 feet <br />(Photograph 4). This section is lined with concrete and is in a <br />deteriorated condition. The fourth test site is located 0.5 <br />miles upstream from the siphon at Salt Creek Wash and extends <br />downstream approximately 1250 feet (Photograph 5). This site is <br />lined with concrete and is in good condition. <br /> <br />. <br /> <br />2 <br />