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CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR TIlE CITY OF LITfLETON, ARAPAHOE COUNTY, COLORADO, UNDER TIlE NATIONAL FLOOD INSURANCE PROGRAM On September 29, 1989, the Department of Homeland Security's Federal Emergency Management Agency identified Special Flood Hazard Areas (SFHAs) in the City of Littleton, Arapahoe County, Colorado, through issuance of a Flood Insurance Rate Map (FIRM). The Mitigation Division has detennined 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 this community is appropriate. The modified Base Flood Elevations (BFEs) revise the FIRM for the community. 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 channel modifications associated with the Watson Lane development along Drainageway D from the confluence with the South Platte River to approximately 1,000 feet downstream of Middlefield Road. This has resulted in increases and decreases in SFHA width and the establishment of BFEs in the left and right overbank areas along Drainageway D, just upstream of, and approximately 500 feet upstream of, the confluence with the South Platte River, respectively. 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)* . Just west ofthe South Platte River and approximately 300 feet south of West Bowles Avenue Approximately 500 feet west of the South Platte River and approximately 2,000 feet south of West Bowles Avenue None 5,321 5,321 None *National Geodetic Vertical Datum, rounded to nearest whole foot Under the above-mentioned Acts of 1968 and 1973, the Mitigation Division 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 premiwn 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 Division 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 9O-day period elapses, the Mitigation Division's detennination to modify the BFEs may itself be changed. Any person having knowledge or wishing to comment on these changes should immediately notify: The Honorable John Ostermiller Mayor, City of Littleton 2255 West Berry Avenue Littleton, CO 80165