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<br />6.A.(4)(a)(III) Existing Minor Class II dams, and <br />Large, Intermediate, and Small Class III dams shall have spillways <br />capable of passing the IOO-year IOF as defined in Rule 5.A.(5)(d). <br /> <br />6.A.(4)(a)(IV) Existing Minor Class III, and <br />Large and Intermediate Class IV dams shall have spillways capable of <br />passing the 50-year IOF as defined in Rule 5.A.(5)(d), <br /> <br />6.A.(4)(a)(V) Existing Small and Minor Class IV <br />dams shall have spillways capable of passing the 25-year IOF as <br />defined by Rule 5,A.(5)(d). <br /> <br />6.A.(4)(a)(VI) The minimum size spillway for all <br />existing Class I dams and Large, Intermediate, and Small Class II <br />dams, for which an incremental damage analysis shows a smaller spill- <br />way is justifiable under Rule 5,A.(5)(c), is the IOO-year flood as <br />defined by Rule 5.A.(5)(d). <br /> <br />6.A.(4)(a)(VII) For dams whose spillway cannot <br />pass the IOF as defined above, the engineer may, as an alternative, <br />provide documentation that overtopping by floods which exceed the <br />spillway capacity, will not cuase failure of the dam. <br /> <br />6.A.(4)(b) The minimum freeboard requirements for an <br />existing dam shall be based upon the maximum depth determined to <br />either prevent overtopping by wave action, or which will pass the IOF, <br />or a minimum of three feet, unless the State Engineer approves less <br />for good cause shown. <br /> <br />Rule 7. ReQuirements for RemovinQ or BreachinQ an ExistinQ Oam <br /> <br />Rule 7.A. An owner proposing to Remove or Breach a dam shall <br />submit an application package in a form acceptable to the State <br />Engineer prior to commencing work. Plans for Removal or Breach of a <br />dam shall meet the following requirements: <br /> <br />7.A.(I) A completed application form provided by the State <br /> <br />Engineer. <br /> <br />7.A.(2) For Class I and Class II dams, A breach plan <br />prepared by an engineer. <br /> <br />- 29 - <br />