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<br />. <br /> <br />. <br /> <br />4 <br /> <br />spillway is lined with rock riprap with dimensions ranGing from 3 <br />to 24 inches. There was a minor amount of debris in the spillway <br />and some of it had been recently burned. Numerous longitudinal <br />cracks and some slumping of natllral coarss-grained materials were <br />observed alonG the south side of the spillway (Figure 6). <br /> <br />The outlet worlcs for the dam consists of a 9-foot (approximate) <br />diameter concrete ring, located about 30 feet into the reservoir <br />from the crest of the upstream slope of the dam (Figure 5). From <br />the top of the structure, two handles control the operation of <br />two valves that regulate flow of two pipelines through the dam. <br />One pipeline, a 20 inch diameter cast iron pipe, serves as the <br />outlet and daylights at the downstream two of the dam, The other <br />pipeline (12 inch diameter) is the water supply line that runs <br />directly into the City of Victor water treatment plant. Both <br />valves apparently are in good operating condition, <br /> <br />The downstream face of the darn is partially protected by rock <br />riprap. Some tress have been growing on the face but many of <br />them have been recently cut down, The slope of the downstream <br />face varies between l,3H to 2H;lV (Figure 2), The steepest <br />portion is at or very near the angle of repose for coarse grained <br />granitic rock (Figure 4), When the dam was raised, coarse- <br />grained fill material was apparently loosely dumped along the <br />downstream face to a location very near the toe of the original <br />face (FiGure 3). The downstream face, however, shows no apparent <br />signs of seepage or slope instability. <br /> <br />The upper 3 feet of the upstream face of the darn is very steep <br />(330) simila::- to portions of the downstream face (Figure 4), A <br />minor amount of undercutting by wave action is noticeable about <br />7 feet below the crest. The upstream slope flattens beneath <br />S feet from the crest to between 1.75 to 2il:lV(Figure 2). <br />