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, .. CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE UNINCORPORATED AREAS OF LARIMER COUNTY, COLORADO, UNDER THE NATIONAL FLOOD INSURANCE PROGRAM On March 18, 1996, the Federal Emergency Management Agency identified Special Flood Hazard Areas (SFHAs) in the unincorporated areas of Larimer County, Colorado, through issuance of a Flood Insurance Rate Map (FIRM). The Mitigation Directorate 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 perfonned to incorporate a channelization and bridge and levee construction project along the Cache La Poudre River from approximately 3,100 feet upstream to approximately 8,000 feet upstream of Prospect Road and has resulted in a revised delineation of the regulatory floodway, increases and decreases in SFHA width, and increased and decreased BFEs for the Cache La Poudre River and Cache La Poudre LPATH. The table below indicates existing and modified BFEs for selected locations along the affected lengths of the flooding source(s) cited above, Location Existing BPE (feet)* Modified BFE (feet)* Cache La Poudre River: Approximately 3,400 feet upstream of Prospect Road Approximately 5,800 feet upstream of Prospect Road Approximately 6,200 feet upstream of Prospect Road 4,907 4,908 4,916 4,914 4,918 4,916 4,891 4,892 4,895 4,893 4,909 4,907 Cache La Poudre LPATH: Approximately 100 feet upstream of Prospect Road Approximately 2,000 feet upstream of Prospect Road Approximately 6,200 feet upstream of Prospect Road *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