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<br />CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE CITY
<br />AND COUNTY OF DENVER AND FOR WE CITY OF AURORA, ADAMS AND ARAPAHOE
<br />COUNTIES, COLORADO, UNDER WE NATIONAL FLOOD INSURANCE PROGRAM
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<br />,
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<br />On August 16, 1995, the Federal Emergency Management Agency (FEMA) identified Special Flood
<br />Hazard Areas (SFHAs) in the City of Aurora, Adams and Arapahoe Counties, Colorado, through issuance
<br />of a Flood Insurance Rate Map (FIRM), On March 4, 1996, and September 7, 1998, FEMA identified
<br />SFHAs in the City and County of Denver, Colorado, through issuance of a FIRM, The Federal Insurance
<br />and Mitigation Administration has detennined that modification of the elevations of the flood having a
<br />l,percent chance of being equaled or exceeded in any given year (base flood) for certain locations in
<br />these communities is appropriate, The modified Base Flood Elevations (BFEs) revise the FIRMs for the
<br />communities,
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<br />the changes are being made pursuant to Section 206 of the Flood Disaster Protection Act of 1973 (Public
<br />Law 93-234) and are in accordance with the National Flood Insurance Act of 1968, as amended
<br />(Title XIII of the Housing and Urban Development Act of 1968, Public Law 90-448), 42 U,S,C,
<br />4001-4128, and 44 CFR Part 65,
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<br />A hydraulic analysis was performed to incorporate the effects of the Westerly Creek Channel
<br />Restoration-Phase 1 along Westerly Creek from the confluence with Sand Creek to just downstream of
<br />Montview Boulevard. Based on this hydraulic analysis, BFEs and a regulatory floodway were
<br />established for Westerly Creek from approximately 1,500 feet upstream of the confluence with Sand
<br />Creek to the City and County of Denver/City of Aurora corporate boundary, Upstream of the corporate
<br />boundary, the revised analysis resulted in a revised delineation of the regulatory floodway, increases and
<br />decreases in SFHA width, and increased and decreased BFEs for Westerly Creek. The table below
<br />indicates existing and modified BFEs for selected locations along the affected lengths of the flooding
<br />source( s) cited above,
<br />
<br /> Existing BFE Modified BFE
<br />Location (feet)* (feet)*
<br />t Approximately 1,400 feet upstream of
<br />confluence with Sand Creek 5,273 5,274
<br />I Approximately 2,600 feet upstream of
<br />confluence with Sand Creek None 5,280
<br />2 Approximately 2,600 feet downstream of
<br />Montview Boulevard 5,306 5,292
<br />1,3 Approximately 700 feet downstream of
<br />Montview Boulevard 5,306 5,305
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<br />"Referenced to the National Geodetic Vertical Datum, rounded to the nearest whole foot
<br />'City and County of Denver
<br />2City and County of Denver/City of Aurora corporate boundary
<br />'City of Aurora
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<br />Under the above-mentioned Acts of 1968 and 1973, the Federal Insurance and Mitigation Administration
<br />must develop criteria for floodplain management. To participate in the National Flood Insurance Program
<br />(NFIP), the community must use the modified BFEs to administer the floodplain management measures
<br />of the NFIP. These modified BFEs will also be used to calculate the appropriate flood insurance premium
<br />rates for new buildings and their contents and for the second layer of insurance on existing buildings and
<br />contents,
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