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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />lined with steel. Outflows discharge into a riprap-lined channel and <br />are conveyed downstream through a narrow valley. <br /> <br />Continental Dam has experienced some seepage problems in the past. <br />particularly when the reservoir level was high. Seepage was first <br />discovered in 1942. At that time, the reservoir was within 8 feet of <br />the spillway crest, and the seepage was observed near the left abut- <br />ment about 33 feet above the bottom of the origi nal outl et conduit. <br />Seepage was evident for a distance of about 30 feet. and was estimated <br />at D.? cubic feet per second lcfs). Some seepage was al so noted to <br />the north of the outlet conduit at the same elevation. Furthermore. <br />the hillside rising above the right abutment is steep and material <br />continually sloughs down into the spillway channel. As a result of <br />the seepage and spillway blockage. the State imposed a storage <br />restriction limiting the reservoir to a gage height of 70 feet. which <br />corresponds to 17.5 feet below the embankment crest. <br /> <br />In 1961. this restriction was removed after the outlet conduit <br />extension was completed. the headwall was constructed, and additional <br />fill material was added. The debris in the spillway chute was also <br />removed. <br /> <br />During 1964, the Continental reservoir area was resurveyed for the <br />purpose of developing a new area-capacity curve. Two separate closed <br />traverses, one at the high-water line and the other 35 feet lower. <br />were done and these surveys were augmented wi th a photogrammetric <br /> <br />I - 4 <br />