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<br />I <br /> <br />I <br /> <br />Colorado State Engineers Office <br /> <br />I <br /> <br />Construction ofthe proposed reservoir is subject to requirements of the Colorado State Engineer's Office <br />(SEO) dam safety requirements. Due to the height and volume of the reservoir as cuiTently proposed, the <br />rese~'Voir will be considered a "Jurisdictional Dam" as defmed by Rules and Regulations For Dam Safety <br />and Dam Construction prepared by the SEO (Reference 3). <br /> <br />I <br />I <br />I <br /> <br />The following defmitions are provided in the regulations and are relevant to the site: <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />"Classification of a Dam" is the placement of a dam into a category based upon an evaluation of <br />the consequences of the failure of the dam absent flooding conditions, assuming the reservoir is <br />at the high-water line. No loss of life nor significant damage is expected to occur ifthf< increased <br />depth of flovv: is two feet or less and the product ofthe average flood plain flow velocity and the <br />depth of flow at a critical area is less than seven in the incremental zone. <br /> <br />A "Class I" dam is a dam for which loss of human life is expected in the event offailure of the <br />dam. <br /> <br />A "Class II" dam is a dam for which significant damage is expected to occur, but no loss of <br />human life is expected in the event of failure of the dam. Significant damage is defined as <br />damage to structures where people generally live, work, or recreate, or public or private facilities <br />exclusive of unpaved roads and picnic areas. Damage means rendering the structures <br />uninhabitable or inoperable. <br /> <br />I <br />I <br /> <br />A "Class III" dam is a dam for which loss of human life is not expected, and damage to stmctures <br />and public facilities as defined for a "Class II" dam is not expected in the event oUailure of the <br />dam. <br /> <br />I <br />I <br /> <br />Based on site conditions, we anticipate that the Hazard Classification would most likely be a Class II or <br />Class III dam which requires design for an Inflow Design Flood of 0.5 x Probable Maximum <br />Precipitation or the IOO-year storm for the Class II or Class III dam respectively. This classification <br />would be verified during final design of the reservoir. A reservoir classification and design report will be <br />required as part of the final design and will require approval of the SEO along with final construction <br />drawings and specifications.. <br /> <br />I <br />I <br />I <br /> <br />6 <br /> <br />I <br />