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<br />LOCAL REQUEST FOR DESIGNATION <br /> <br />WHEREAS, the Urban Drainage and Flood Control District requested, by letter dated October <br />I, 2001, CWCB designation and approval of said new report for the Lower Box Elder Creek <br />Watershed within Adams County and the City and County of Denver; and <br /> <br />WHEREAS, CWCB staff notified the Urban Drainage and Flood Control District by letter <br />dated October 18, 2001 of the proposed designation action as requested; and <br /> <br />WHEREAS, Adams County and the City and County of Denver have coordinated with the <br />Urban Drainage and Flood Control District during the development and review of said new report, and <br />their comments were addressed by Wright Water Engineers; and <br /> <br />C.R.S. AUTHORITY <br /> <br />WHEREAS, Section 37,60-106(1)(c), Colorado Revised Statutes, requires the Colorado Water <br />Conservation Board to assist in the prevention of floods and flood damages therefrom; and <br /> <br />WHEREAS, Sections 31,23-301 and 30,28-111, Colorado Revised Statutes, provide that <br />legislative bodies of local jurisdictions may provide zoning regulations for land uses on or along any <br />storm or floodwater runoff channel or basin only after designation and approval by the Colorado Water <br />Conservation Board; and <br /> <br />WHEREAS, Section 37-60,106(1)(c), Colorado Revised Statutes, directs the Colorado Water <br />Conservation Board to designate and approve storm or floodwater runoff chaunels or basins and to <br />make such designations available to legislative bodies of local jurisdictions; and <br /> <br />CONSISTENCY WITH PREVIOUS FLOODPLAIN STUDIES <br /> <br />WHEREAS, the detailed floodplain information for the said report reaches contained in said <br />new report dated September 2001 for Adams County and the City and County of Denver revises and is, <br />therefore, inconsistent with the previous floodplain information for said report reaches contained in <br />Resolution No, 530; and <br /> <br />COMPLIANCE WITH CWCB TECHNICAL STANDARDS <br /> <br />WHEREAS, said new report is based on hydrographs that were developed using the Colorado <br />Urban Hydrograph Procedure computer model and then combined and routed using the UDFCD <br />stormwater management model; and <br /> <br />WHEREAS, hydraulic analyses were completed for approximately 53 stream miles ofthe main <br />stem and tributaries of Box Elder Creek, Bear Gulch, and Lower Hayesmount Creek using the U.S, <br />Army Corps of Engineers computer backwater model HEC-RAS; and <br /> <br />2 <br />