Mansions Phase 1-CS 980208CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE CITY
OF COPPELL, DALLAS AND DENTON COUNTIES, TEXAS, UNDER THE NATIONAL FLOOD
INSURANCE PROGRAM
On April 15, 1994, the Federal Emergency Management Agency identified Special Flood Hazard Areas
(SFHAs) in the City of Coppell, Dallas and Denton Counties, Texas, 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 Natioruil Flood Insurance Act of 1968, as amended (~l~itle 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 placement of fill, grading, and excavation of two ponds
associated with the Mansions by the Lake development; addition of the State Highway 121 bridge to the
hydraulic model for Denton Creek; and more detailed topographic information from approximately
3,840 feet downstream to just upstream of State Highway 121. This has resulted in a revised delineation
of the regulatory floodway, increases and decreases in SFHA width, and decreased BFEs for Denton Creek
from approximately 3,290 feet downstream to just downstream of State Highway 121.
Existing BFE Modified BFE
Location (feet)* (feet)*
Approximately 250 feet downstream of State Highway 121 467 466
Approximately 2,570 feet downstream of State Highway 121 466 465
*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
of changed conditions or new scientific or technical data. All interested parties are on notice that until the
90-day period elapses, the Mitigation Directorate's determination to modify the BFEs may itself be
changed.
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Any person having knowledge or wishing to comment on these changes should immediately notify:
The Honorable Candy Sheehan
Mayor, City of Coppell
255 Parkway Boulevard
Coppell, Texas 75019