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<br />WHEREAS, the detailed floodplain information in said report dated January 19, 1982 in the <br />City of Thornton was, from the period between January 19, 1982 and August 1995, the most <br />current regulatory floodplain information available to the community and was consistent with the <br />requirements for detailed information listed under the Board's "Rules and Regulations for the <br />Designation and Approval of Floodplains and of Storm or Floodwater Runoff Channels in <br />Colorado" (2 CCR408-1). <br /> <br />WHEREAS, a procedure for determining hydrology information in the City of Thornton for <br />approximate floodplains of streams, lakes, ponds, local storm drainage areas, and overflows from <br />irrigation ditches and canals has not been established by the CWCB; and those floodplain areas <br />may not be designated as approximate floodplain information without 100-year peak flow values, <br />and therefore the local government should have required that detailed hydrologic and hydraulic <br />studies be performed by a professional engineer III1d submitted by the developer or the development <br />proponent prior to any floodplain development iu those cases; and <br /> <br />DESIGNATION AND APPROVAL ACTION <br />NOW, THEREFORE, BE IT RESOLVED by the Colorado Water Conservation Board in <br />regular meeting assembled in Castle Rock, Colorado, this 29th day of March 1999, that it does <br />hereby designate and approve as detailed infomlation, from the period between January 19, 1982 <br />and August 1995, the storm or floodwater runoff channels or basins within the City of Thornton <br />described by detailed floodplain information in said report with included mapping dated January <br />19, 1982; and <br /> <br />BE IT FURTHER RESOLVED by the Colorado Water Conservation Board that it does <br />hereby designate and approve as approximate floodplain information, from the period between <br />January 19, 1982 and August 1995, the streams, lakes, ponds, and local storm drainage areas within <br />the City of Thornton, in said report dated JanUllfY 19, 1982, that do not meet the criteria for the <br />"Board's Rules and Regulations for the Designation and Approval of Floodplains and of Storm or <br />Floodwater Runoff Channels in Colorado" (2 CCR 408-1), contingent upon the understanding that <br />the City of Thornton regulated those approximate floodplains on a case-by-case basis, subject to <br />detailed hydrologic and hydraulic analyses that were performed by a registered professional <br />engineer and submitted by the developer or development proponent when applicable; and <br /> <br />BE IT FURTHER RESOLVED that we Secretary of the Board is directed to send a <br />certified copy of this resolution to the City of Thornton; the Board of County Commissioners of <br />Adams County; the Colorado Office of Emergency Management; and the Federal Emergency <br />Management Agency, Region 8. <br /> <br />4 <br />