1997-07-28_REVISION - M1981302 - Laserfiche WebLink

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' r V 111 . NO FLOpQ • III �II1I11II11II�II �P O � O z a 6 L.Scott Tucker,E+aculive Director 2b�610 June 11, 1997 RECEIVED JUL 2 81997 Board of Directors Jeffrey S.Lipton Director,Business Services Division of fvlingreJlg 4.agology Executive Comminoa: University of Colorado at Boulder Cathy Rlynolda Campus Box 317 Chairmen City of Denver Boulder, CO 80309-03I7 Linaa Morton c Chairmen Pro-Tern City of Lakamad 3 Dear Jeff-, a Robert A.Christensen 9ecretery Douglas County This letter is in response to your letter of June 10, 1997, regarding the dike or levee at the John stare Treasurer University of Colorado property, also referred to as the Flatirons Property or the Deepe Jefferson County W Farm Pit. We understand that your agent is seeking a technical revision to the present Dennis RaynoWa reclamation plan from the Division of Minerals and Geology in order to raise portions of M"moer City of utdaton y the levee to provide four feet of freeboard above the 100-year flood profile. You asked Members: my opinion on three subjects. Your questions and my responses are provided below. - � . Carolyn Buchholzt City Or Lafayette m 1. You asked "Whether the dike should remain in place, and, if to, whether the „ Margaret Carpenter lower portions of the dike should be raised to a level at least four feet above the City of immnh 3 base flood level." Paul Danish Boulder County c BSI H;mmaunenn $ We believe that this dike, or levee as we prefer to call it, should definitely remain City of Denver B.M.Moftmealer Q in place unless or until an alternative flood control or flood mitigation strategy is Engineer in place. The requirements of the Federal Emergency Management Agency Fast Montoya City of Denver (FEMA) regarding recognition or certification of a levee includo a requirement Eau Moaiey g for a minimum of three feet of freeboard above the base flood (100-year flood). Gry of Aurora Otlege At a meeting convened by the Colorado Water Conservation Board (CWCB) at °city ci o�r the Boulder County Court House, which you and I both attended, representatives An er a from the Flatiron Companies offered to add a foot to the freeboard, making a Engingl,,e`( B Mary Poe total of four feet, to account for potential inadequacies in past hydrologic lbwn of Morrison K analyses of South Boulder Creek. We felt that that offer was a prudent one and Edina count Adorns Countyy we supported it. The actual parameters for the raising of the levee were Debra vickray established in a subsequent meeting held in our office which was attended by Arapahoe County representatives from CWCB and Flatirons. We continue to support Flatirons' offer of four feet although FNMA only requires three feet. 2. You asked "Whether the dike currently offers flood protection benefit to the residences to the north of the property." �DoodtbiWipfan .