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FLOOD04785
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Last modified
1/25/2010 6:47:15 PM
Creation date
10/5/2006 12:59:29 AM
Metadata
Fields
Template:
Floodplain Documents
County
Boulder
Community
Longmont
Stream Name
Dry Creek No. 1
Basin
South Platte
Title
LOMR - Affected Panel 269 F, 270 F - Case No. 95-08-140P
Date
6/19/1995
Prepared For
Longmont
Prepared By
FEMA
Floodplain - Doc Type
Historic FEMA Regulatory Floodplain Information
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<br />CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE CITY <br /> <br />OF LONGMONT, BOULDER COUNTY, COLORADO, UNDER THE NATIONAL FLOOD <br /> <br />INSURANCE PROGRAM <br /> <br />On June 2, 1995, the Federal Emergency Management Agency (FEMA) identified Special Flood <br /> <br />Hazard Areas (SFHAs) in the City of Longmont, Boulder County, Colorado, through issuance of a Flood <br /> <br />Insurance Rate Map (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 the City of <br /> <br />Longmont is appropriate. The modified base 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, 4001- <br /> <br />4128, and 44 CFR Part 65. <br /> <br />A hydraulic analysis was performed to incorporate channelization along Dry Creek No, 1 and a <br /> <br />culvert project at Airport Road and has resulted in a revised delineation of the SFHA and modified BFEs <br /> <br />from a private road to approximately 1,450 feet downstream of Airport Road. The table below indicates <br /> <br />the modified BFEs for several locations along the affected length of Dry Creek No.1. <br /> <br />Location <br /> <br />Existing BFE <br />(feet). <br /> <br />Modified BFE <br />(feet). <br /> <br />Approximately 900 feet downstream of Airport Road <br />Approximately 140 feet upstream of Airport Road <br />Approximately 1,800 feet downstream of private road <br /> <br />5,013 <br />5,019 <br />5,024 <br /> <br />5,013 <br />5,020 <br />5,023 <br /> <br />.National Geodetic Vertical Datum, rounded to nearest whole foot <br />
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