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<br />, <br /> <br />CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR BOULDER <br /> <br />COUNTY, COLORADO, UNDER THE NATIONAL FLOOD INSURANCE PROGRAM <br /> <br />On July 3, 1990, the Federal Emergency Management Agency (FEMA) identified Special Flood <br /> <br />Hazard Areas (SFHAs) in Boulder County, Colorado, through issuance of a Flood Insurance Rate Map <br /> <br />(FIRM). <br /> <br />The Mitigation Directorate has determined that modification of the elevations of the flood having <br /> <br />a I-percent chance of occurrence in any given year (base flood) for certain locations in Boulder County <br /> <br />is appropriate. The modified base (100-year) flood elevations (BFEs) revise the FEMA FIRM for the <br /> <br />community. <br /> <br />The changes are being made pursuant to Section 206 of the Flood Disaster Protection Act of 1973 <br /> <br />(Public Law 93-234) and are in accordance with the National Flood Insurance Act of 1968, as amended <br /> <br />(Title XIII of the Housing and Urban Development Act of 1968, Public Law 90-448), 42 U.S.C. <br /> <br />4001.4128, and 44 CFR Part 65. <br /> <br />A hydraulic analysis was performed to incorporate fill and excavation in the floodplain associated <br /> <br />with the construction of Goose Haven One N.U.P.U.D. Subdivision and more detailed topographic <br /> <br />information along Boulder Creek, and has resulted in changes in SFHA and lower BFEs from just <br />, <br /> <br />upstream of to approximately 1 mile upstream of North 107th Street (U.S. Highway 287). The table <br /> <br />below indicates the modified BFEs for several locations along the affected length of Boulder Creek. <br /> <br />Location <br /> <br />Existing BFE <br />(feet)* <br /> <br />Modified BFE <br />(feet\* <br /> <br />Just upstream of North 107th Street <br />Approximately 1,200 feet upstream of North 107th Street <br />Approximately 2,850 feet upstream of North 107th Street <br />Approximately 5,400 feet upstream of North 107th Street <br /> <br />5,018 <br />5,021 <br />5,027 <br />5,037 <br /> <br />5,018 <br />5,020 <br />5,026 <br />5,037 <br /> <br />*National Geodetic Vertical Datum, rounded to nearest whole foot <br /> <br />Under the above-mentioned Acts of 1968 and 1973, the Mitigation Directorate must develop criteria <br /> <br />for floodplain management. For the community to participate in the National Flood Insurance Program <br />