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<br />-, <br /> <br />c <br /> <br />earth moveaent, earthquakes, failure of bulkheads, flash- <br />boards, gates on conduits or otber conditions as dangers to <br />dams. ~he folloving outline, although incomplete, is an <br />atte.pt at .ore detail. <br /> <br />A. Inadequate Design <br /> <br />1. Pailure to reaove weak substrate. <br /> <br />2. Pailure to cutoff and/or control Hepacae. <br /> <br />3. Use of improper materials. <br /> <br />4. Inadequate freeboard. <br /> <br />5. Inadequate slope protection. <br /> <br />6. Inadequate emergency outlet works. <br /> <br />7. Inadequate evaluation of stability. <br /> <br />8. Inadequate design criteria. <br /> <br />B. Inadequate Construction <br /> <br />Myriad possible errors can occur during construc- <br />tion. If not corrected they can eventually lead to <br />failure of tbe structure. <br /> <br />( <br /> <br />C. Old Age or Lack of Maintenance <br />1. Deterioration of structural materials. <br /> <br />2. Deterioration of material adjacent to dam. <br />3. Obstruction of outlet vorks. <br />4. Clogging of drains. <br />5. Obstruction of spillvays. <br />6. Internal erosion (piping). <br />7. Inadequate maintenance. <br />D. Seismic and Geomorphic Pbenomena <br />1. Earthquake daaacae. <br />2. Eartbquake-caenerated vaves and seiches. <br />3. LandSlides and Rockfalls <br /> <br />c <br /> <br />4. Irosion of structure. <br /> <br />-4- <br /> <br />. <br /> <br />. <br /> <br />. <br />