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CHANGES ARE MADE IN DETERMINATIONS OF BASE FLOOD ELEVATIONS FOR THE CITY OF BOULDER, BOULDER COUNTY, COLORADO, UNDER THE NATIONAL FLOOD INSURANCE PROGRAM On June 2, 1995, the Federal Emergency Management Agency (FEMA) identified Special Flood Hazard Areas (SFHAs) in the City of Boulder, Boulder County, Colorado, through issuance of a Flood Insurance Rate Map (FIRM). 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 the City of Boulder is appropriate. The modified base flood elevations (BFEs) revise the FEMA 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 performed to incorporate the effects of more detailed topographic information and the construction of channel improvements along Goose Creek, including a 1,440-foot trapezoidal grass-lined channel from Foothills Parkway to the Burlington Northern Railroad (BNRR) crossing, an 815,foot rectangular riprap-lined channel from the BNRR crossing to 30th Street, five lO-foot by 8-foot reinforced concrete box culverts under the BNRR crossing, and two 23-foot by 9-foot reinforced concrete box culverts under 30th Street. This revision results in a revised delineation of the regulatory floodway and modifications to the SFHA width a~d BFEs for the reach of Goose Creek from Foothills Parkway to approximately 100 feet upstream of 28th Street. The table below indicates the modified BFEs for several locations along the affected length of Goose Creek.