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" CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE UNINCORPORATED AREAS OF ARAPAHOE COUNTY, COLORADO, UNDER THE NATIONAL FLOOD INSURANCE PROGRAM On August 16, 1995, the Federal Emergency Management Agency identified Special Flood Hazard Areas (SFHAs) in the unincorporated areas of Arapahoe County, Colorado, through issuance of a Flood Insurance Rate Map (FIRM). The Mitigation Directorate has determined that modification of the elevations of the flood having a 1-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 more detailed topographic information, grading along the west bank of Cherry Creek at the Southcreek Development, and channelization of Happy Canyon Creek from the confluence with Cherry Creek to just downstream of Jordan Road. This has resulted in a revised delineation of the regulatory floodway along Cherry Creek, and increases and decreases in SFHA widths and increased and decreased BFEs for Cherry Creek and decreases in SFHA width and decreased BFEs for Happy Canyon Creek. The increases in BFEs for Cherry Creek were a result of the incorporation of more detailed topographic information. 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)* Cherry Creek: Approximately 600 feet downstream of confluence with Happy Canyon Creek Approximately 2,000 feet upstream of confluence with Happy Canyon Creek Approximately 7,400 feet upstream of confluence with Happy Canyon Creek 5,678 5,679 5,691 5,690 5,709 5,710 Happy Canyon Creek: Approximately 500 feet upstream of confluence with Cherry Creek Approximately 1,500 feet upstream of confluence with Cherry Creek Approximately 2,500 feet upstream of confluence with Cherry Creek 5,687 5,683 5,698 5,687 5,707 5,700 *National Geodetic Vertical Datum, rounded to nearest whole foot 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.