FLOOD11106 - Laserfiche WebLink

Home Browse Search

CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE UNINCORPORATED AREAS OF DOUGLAS COUNTY, COLORADO, UNDER THE NATIONAL FLOOD INSURANCE PROGRAM On September 30, 1987, the Federal Emergency Management Agency identified Special Flood Hazard Areas (SFHAs) in the unincorporated areas of Douglas County, Colorado, through issuance of a Flood Insurance Rate Map (ETIM). The Mitigation Directorate has determined 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 CFRPart 65. A hydraulic analysis was performed to incorporate the effects of construction along Big Dry Creek of maj or drainageway features that consist of bank protection, grade-control structures, crossing structures, and detention facilities, including Pond 10 just upstream of South University Boulevard, and revised hydrologic and hydraulic analyses along Big Dry Creek Tributary C. This has resulted in increases and decreases in SFHA widths and the establishment of regulatory floodways and BFEs for Big Dry Creek and Big Dry Creek Tributary C. 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) * Big Dry Creek: Approximately 1,000 feet upstream of County Line Road Approximately 300 feet upstream of Lincoln Avenue (South University Boulevard) None 5,684 None 5,842 Big Dry Creek Tributary C: At confluence with Big Dry Creek Approximately 200 feet upstream of McArthur Ranch Road None 5,842 None 5,961 *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. 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 Directorate reconsider the determination. Any request for reconsideration must be based on knowledge