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4. FPR 00-519: City of Greeley and Weld County, Floodplain Study, Cache La Poudre River, dated October 1999 was prepared by the U.S. Army Corps of Engineers, Omaha District. This study includes detailed floodplain for a reach of the Cache La Poudre River from its confluence with the South Platte River upstream to County Road 23 near Windsor. An existing hydraulic model through a portion of the City of Greeley was modified and adopted for this study. Several previous floodplain studies have been published for this river in the study area. FEMA has floodplain information for Greeley, Windsor, and Weld County, and that information compared favorably to that of the current study. DISCUSSION The designation action for the City and County of Denver is being taken under rule 9.D.2 (Board Initiative). The Denver stormwater/floodplain staff person was contacted in the past regarding the proposed designation action for of the Denver Flood Insurance Studies. The City did not wish to request the CWCB to move forward with tbe Board action, therefore the CWCB staff is recommending that the Board act under the "Board Initiative" rule in lieu of the "Community Request" rule. The technical information for tbe Denver Flood Insurance Studies appears to be reasonable, and the CWCB staff does not find any reasons to delay the designation and approval action for the Denver studies. The CWCB staff believes that it is in the best interest of the health, safety, and welfare of the citizens of Denver to designate and approve the subject Flood Insurance Studies for the City and County of Denver. The Urban Drainage and Flood Control District has previously endorsed the CWCB's floodplain desi~nation and approval process. The CWCB staff did not find any technical deficiencies with the Urban Drainage study (Lemon Gulch and Oak Gulch) or the Weld County study (Cache La Poudre River). These studies will be designated under Rule 9.D.I (Community Request). RECOMMENDATIONS The detailed floodplain information being considered for designation and approval as outlined in Resolutions Nos. 00-516 and 00-517 meets the applicable requirements of the Board's "Floodplain Designation and Approval Rules", The approJ(imate floodplain information being considered within those 2 resolutions does not meet the applicable requirements of the Board's "Floodplain Designation and Approval Rules". However, staff recommends designation and approval of the approximate reaches subject to the local government requiring a detailed study prior to development activities occurring in those areas. The detailed floodplain information being considered for designation and approval as outlined in Resolution Nos. 00-518 and 00-519 meets the applicable requirements of the Board's "Floodplain Designation and Approval Rules." Staff reconunends designation and approval of this detailed floodplain information. 2 .~!' ~~ '.-:1-:;' .t' , " . e e