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CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR TIIE TOWN OF WINDSOR AND TIIE UNINCORPORATED AREAS OF WELD COUNTY, COLORADO, UNDER TIIE NATIONAL FLOOD INSURANCE PROGRAM On September 27, 1991, and September 22, 1999, the Federal Emergency Management Agency identified Special Flood Hazard Areas (SFHAs) in the Town of Windsor and in the unincorporated areas of Weld County, Colorado, respectively, through issuance of Flood Insurance Rate Maps (FIRMs). The Mitigation Directorate has determined that modification ofthe elevations of the flood having a I-percent chance of being equaled or exceeded in any given year (base flood) for certain locations in these communities is appropriate. The modified Base Flood Elevations (BFEs) revise the FIRMs for the communities. The changes are being made pursuant to Section 206 of the Flood Disaster Protection Act of 1973 (Public Law 93-234) and are in accordance with the National Flood Insurance Act of 1968, as amended (Title XIII of the Housing and Urban Development Act of 1968, Public Law 90-448), 42 U.S.C. 4001-4128, and 44 CFR Part 65. A hydraulic analysis was performed to incorporate more detailed topographic information and placement of fill along the northern side of the Cache La Poudre River and has resulted in increases and decreases in SFHA width and decreased BFEs for the Cache La Poudre River, The table below indicates existing and modified BFEs for selected locations along the affected lengths of the flooding source(s) cited above. Existing BFE Modified BFE Location (feet). (feet). 'Approximately 2,800 feet downstream of Whitney Ditch Diversion 4,777 4776 'Approximately 2,000 feet downstream of Whitney Ditch Diversion 4,778 4,777 'Approximately 1,500 feet downstream of Whitney Ditch Diversion 4,779 4,778 'Approximately 300 feet downstream of Whitney Ditch Diversion 4,781 4,780 .National Geodetic Vertical Datum, rounded to nearest whole foot 'Unincorporated areas of Weld County 'Town of Windsor Under the above-mentioned Acts of 1968 and 1973, the Mitigation Directorate must develop criteria for floodplain management. To participate in the National Flood Insurance Program (NFIP), the community must use the modified BFEs to administer the floodplain management measures of the NFIP. These modified BFEs will also be used to calculate the appropriate flood insurance premium rates for new buildings and their contents and for the second layer of insurance on existing buildings and contents. Upon the second publication of notice of these changes in this newspaper, any person has 90 days in which he or she can request, through the Chief Executive Officer of the community, that the Mitigation Directorate reconsider the determination. Any request for reconsideration must be based on knowledge of changed conditions or new scientific or technical data. All interested parties are on notice that until the 90-day period elapses, the Mitigation Directorate's determination to modify the BFEs may itself be changed.