Laserfiche WebLink
<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 />Original specifications indicate that the original lake surface eleva- <br />tion was below the flow line of the outlet works. <br /> <br />The construction methodology used during original construction was <br />hydraul ic fill. Indications are no speci al embankment consol idation <br />attempts were made. <br /> <br />The dam consists of two separate embankments; a natural hill below <br />the crest segments the embankment into two structures. Detail s are <br />shown on Figure 1-2. The resulting westernmost embankment or dike is <br />40 feet high and the eastern main dam is 102 feet high. Although the <br />crest level has minor variations, the average elevation is approxima- <br />tely 9,490 feet. The western (40 foot) dike contains the outlet works <br />access shaft; the outlet conduit is within a tunnel excavated within <br />the 1 eft abutment of the di ke. Upstream slopes of the embankments are <br />about 3 horizontal to 1 vertical (3H:IV) and protected with riprap. <br />The downstream slopes vary between 2.1H:IV to 2.3H:IV (designed to be <br />2H:IV) and are also protected with riprap. The riprap is basically <br />rounded, alluvial-glacial in origin, and usually smaller than 12 <br />inches. The area-capacity curve for the dam is shown on Figure 1-3. <br /> <br />An emergency spillway was excavated through natural rock at the <br />right abutment. The spillway channel discharge would be close to the <br />embankment-abutment contact, but the upstream side of the channel has <br />been diked to avoid impinging upon the contact. The reservoir is off- <br />channel and the storage has been regul ated by the S';RC such that it <br />has never spilled. <br /> <br />1-2 <br />