FLOOD00590

• County: Weld
• Community: Weld County and Unincorporated Areas
• Stream Name: Cache La Poudre River
• Title: LOMR - Affected Panel 080266 0605 D, 0001 - Case No. 99-08-352P
• Date: 12/6/2000
• Prepared For: Weld County
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

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CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR TIIE
UNINCORPORATED AREAS OF WELD COUNTY, COLORADO, UNDER TIIE NATIONAL
FLOOD INSURANCE PROGRAM

On September 27, 1991, the Federal Emergency Management Agency identified Special Flood Hazard
Areas (SFHAs) in the unincorporated areas of Weld 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 corrections to the alignment of County Road 17 and
the geometry of Eastman Park Drive for superelevation, updated topographic infonnation, and
optimization of the floodway along the profile baseline for the Cache la Poudre River from just
downstream to approximately 3,000 feet upstream of the corrected alignment of County Road 17, This
has resulted in increased and decreased BFEs and a revised delineation of the regulatory floodway along
the profile baseline for the Cache la Poudre River, 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)"

Approximately 650 feet upstream of
corrected alignment of County Road 17
along profile baseline

4,765

4,764

Approximately 1,900 feet upstream of
corrected alignment of County Road 17
along profile baseline

4,768

4,769

"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 detennination, 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 detennination to modifY the BFEs may itself be
changed,