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<br />7 .A. (2)(a) The dam shall be excavated down to the level, <br />of the oatural ground, or, as necessary in accordance wtth Rule <br />7.A.(2)(c), at the maxtmum section; and the breach shall be of <br />sufficient wtdth to pass the 100-year 24-hour flood at a depth of less <br />than ftve feet. However, the maximum breach width shall be the total <br />removal of the dam regardless of the flood magnitude; <br /> <br />7.A.(2)(b) The sides of the breach shall be excavated <br />to a slope which is stable but not steeper than one hortzontal to one <br />vertic.l; <br /> <br />7.A.(2)(c) The breach shall be destgned to control <br />silt, whtch has previously been deposited on the reservotr bottom and <br />the excavated material from the breach from washing downstream; <br /> <br />7.A.(2)(d) The reservoir shall bel!lllptied in a eon- <br />trolled manner which will not endanger lives or damage downstre.. <br />properties; and <br /> <br />7.A.(2)(e) The drawing(s) of the plan for, the breach of <br />a dam shall include the location, dimensions and ,lowest elevation of <br />the breach. <br /> <br />7.A.(3) For Class III and Class IV dams the owner shall <br />submit a written notice of intent to breach the dam to the State <br />Engineer. <br /> <br />7.A.(3)(a) The State Engineer shall determine the size <br />of the breach in accordance with the following: The bottom width, of <br />the breach shall be one-half the height of the dam but not less than <br />ten feet; and the side slopes not steeper than one horizontal to one <br />vertical. The breach shall be to original ground at the low point 1n <br />the foundation of the dam and the excavated material shall not be <br />placed in the stream channel. <br /> <br />Rule 8. ADorovi,l for, Consfruction. Enlaraement. Alteration. <br />Modification. Dr ReDair Becomes Void After Five Years. <br /> <br />If construction) alteration, or repair of a reservoir dam is not <br />commenced within five years of approval of the application, the State <br />Engineer's approval shall be void. The owner must resubmit the <br />application and receive approval before commencing construction, and <br />shall meet the requirements of the current rules and regulation. <br /> <br />- 30 - <br />