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<br />. <br /> <br />was given to items related to embankment stability such as leakage, <br /> <br /> <br />erosion, seepage, slope instability, undue settlement, displacement, <br /> <br />tilting, cracking, deterioration, and improper functioning of drains <br /> <br />and relief wells. <br /> <br />Conditions relating to structural adequacy were observed during <br /> <br />the dam inspections. These conditions included a spillway discharge <br /> <br /> <br />positioned so it could erode the embankment, a lack of rip rap or vegeta- <br /> <br /> <br />tion which could promote erosion, an uneven spillway or embankment <br /> <br /> <br />level which could cause flows to concentrate and rapidly erDde, erosion <br /> <br /> <br />at the outlet works discharge, and excessively steep slopes. Another <br /> <br /> <br />potential hazard is "piping"; with this condition, water under pressure <br /> <br />can find a path through the embankment by way of small openings, These <br /> <br /> <br />openings can rapidly be enlarged by erosion. The possibility Df this <br /> <br /> <br />condition was indicated by trees on the embankment, which could leave <br /> <br /> <br />root holes; by rodent holes; or by seepage. <br /> <br />RESULTS OF DAM INSPECTIONS <br /> <br />The results of the dam inspections are summarized in tables 11 and <br /> <br /> <br />12. The numberpreceeding the name of each dam can ,be used to locate <br /> <br /> <br />the dams on plate 12, <br /> <br />Elevations in tables 11 and 12 usually refer to a local datum, <br /> <br /> <br />generally the low point at the upstream side of the dam. In table 11, <br /> <br /> <br />the inventory number is a designation used in CDrps of Engineers and <br /> <br /> <br />State of Colorado records and should be used if requesting further <br /> <br /> <br />information about a particular dam. A dam located "Dffstream" is <br /> <br /> <br />usually in a normally dry gulch and its water source is a canal or <br /> <br /> <br />another upstream dam. <br /> <br />The letters "D.A." refer to the drainage area contributing to the <br /> <br />dam. <br /> <br />. <br /> <br />42 <br />