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CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE TOWN OF COLUMBINE VALLEY AND THE CITY OF LITTLETON, ARAPAHOE COUNTY, COLORADO, UNDER THE NATIONAL FLOOD INSURANCE PROGRAM The Federal Emergency Management Agency identified Special Flood Hazard Areas (SFHAs) in the Town of Columbine Valley on August 16, 1995, and in the City of Littleton on September 29, 1989, through issuance of Flood Insurance Rate Maps (FIRMs). The Mitigation Directorate has determined that modification of the 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 construction of two 12-foot by 25-foot pre-cast, three-sided box culverts at Fairway Lane and channel modifications along Dutch Creek from approximately 110 feet upstream of Fairway Lane to the confluence with the South Platte River and has resulted in a revised delineation of the regulatory flood way , an increase and decrease in SFHA width, and increased and decreased BFEs for the revised reach of Dutch Creek. The table below indicates existing and modified BFEs for selected locations along the affected lengths of the flooding source(s) cited above. Location Existing BFE (feet)* Modified BFE (feet)* 1 Approximately 1,100 feet upstream of Fairway Lane lApproximately 100 feet upstream of Fairway Lane 2Just upstream of confluence with South Platte River 5,362 5,360 None 5,361 5,355 5,326 *National Geodetic Vertical Datum, rounded to nearest whole foot I Town of Columbine Valley 2 City of Littleton 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.