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<br />so water hammer is a factor. The miniml1.t1 closure tillle on the valves <br /> <br />at the filter is 30 seconds. (See computations, Appendix G, p. Qo..5 .) <br /> <br />As a further precaution against \\fa tel' ham.'ller, a 200 gallon surge tank <br /> <br />with an air compressor should be installed to avoid any damage. <br /> <br />Geologic Considerations <br /> <br />The project does have hazards related to geology, especially at <br />the intake works. The diversion structure had to be located away from <br />an avalanche path that was just upstream. Also, special care had to <br />be taken that L~e facilities were not located in mudslide areas, areas <br />of excessive slopes and away fron! a constriction in the stream channel <br />that would cause a restriction of water in a flood period. All facilities <br />were checked to insure the feasillility of locating them above a 100 year <br />flood flow. <br />,At the tank site, the slope and character of the soil was checked <br />for sui t.abili ty and stability as a tank fOlll1dation. The soil is ,1ell <br /> <br />drained a-~d does not lose stabi~ty or appreciable strength when satu- <br /> <br />rated. The existing tank foundation which is located on the site, shows <br />no sign of movement or failure. <br /> <br />- 31- <br />