Laserfiche WebLink
<br />:/ <br /> <br />. <br /> <br />. <br /> <br />However, to ml.nln~Ze seepage and insure the safe.ty and stahility of <br />the., dam, n cutoff trench \.orill be ('~xc~vaLcd t<.> shillc, augmented ,."hcrc <br />the depth to shllle exceeds nominal depth Idth a slurry trench to <br />provide II cutoff curtain under the dam. The slurry trench Ilill be <br />carried under the dam on the right Ilbutment to the point Ilhere the <br />surface of the joint-use pool intersects the existing ground surface <br />which arc the portions of the reservoir Ilhich '"ill be regularly <br />used for storllge. The slurry trench Cllnnot be extended beyond that <br />po'int because the maximum practical construction depth is about <br />100 feet. There will, of course, bc some flow around the end of the <br />slurry trench in the alluvium. <br /> <br />As noted above, foundation conditions are also much better at the <br />Narrolls site. The nonnal reservoir "ater depths at Teton and Narrows <br />arc 293 fact and 97 faet, respectively, "ith the maximum depth under <br />extreme flood conditions being 297 feet and 141 feet. The depth of <br />Ilater being three times as much in Teton as in Narrows under normal <br />conditions made designing and construction against seepage in the <br />case of Teton more difficult than at Narrows. <br /> <br />2 <br />