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<br /> <br />. <br /> <br />EM: 1110-2-1913 <br />31 Mar 78 <br /> <br />Table 2-1. Factors Requiring Intensive F'eld <br />Investigations and Design Studies <br /> <br />^., <br /> <br />Factor <br /> <br />Field Investigations and esign Studies <br />Should Be More Extens. Where: <br /> <br /> <br />s experience in <br />respect to <br /> <br />Previous experience <br /> <br />There is little or no previ <br />the area particularly wit <br />levee performance <br /> <br />Consequences of failure <br /> <br />Consequences of failure invo <br />property are great (urban <br />instance) <br /> <br />life and <br />for <br /> <br />Levee height <br /> <br />Levee heights are great <br /> <br />Foundation conditions <br /> <br />Foundation soils are weak <br /> <br /> <br />compressible <br /> <br />Foundation soils are highly ariable along <br />the alignment <br /> <br />. <br /> <br />Potential under seepage <br /> <br />Foundation sands <br />susceptible <br /> <br />Duration of high water <br /> <br />High water levels against th <br />over relatively long perio <br /> <br />exist <br /> <br />Borrow materials <br /> <br />Available borrow is of low q ality, water <br />contents are high, or borr w materials are <br />variable along the alignme t <br /> <br />Structure in levees <br /> <br />Reaches of levees are adjace <br />structures <br /> <br />to concrete <br /> <br />2-2 <br /> <br />. <br />