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, Federal Emergency Management Agency Washington, D.C. 20472 RECEIVED MAR 1 8 1997 CERTIFIED MAIL RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No.: 97-08-073P Colorado Water conservation Board The Honorable Leon Young Mayor, City of Colorado Springs P,O. Box 1575 Colorado Springs, Colorado 80901 Community: City of Colorado Springs, Colorado Community No,: 080060 Panel Affected: 0158 B Effective Date of This Revision: MAR 0 7 1997 102-I-C Dear Mayor Young: This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective Flood Insurance Rate Map (FIRM) for your community in accordance with Part 65 of the National Flood Insurance Program (NFIP) regulations, In a letter dated December 3, 1996, Mr. Dan Bunting, Regional Building Administrator, Regional Building Department, City of Colorado Springs, requested that FEMA revise the FIRM to show the effects of channel improvements and culvert construction along Fairfax Creek associated with the proposed development of Fairfax at Briargate, The channel improvements consist of a grass-lined trapezoidal channel with a low-flow trickle channel and five drop structures. These improvements along Fairfax Creek extend from approximately 2,000 feet upstream to approximately 3,360 feet upstream of Potomac Drive. The culvert construction consists of two 10-foot by 8-foot reinforced-concrete box culverts under Chancellor Drive, approximately 2,700 feet upstream of Potomac Drive, The downstream end of the channel improvements ties into an existing channelization project reflected in a previous Letter of Map Revision (LOMR) dated January 5, 1995, This request and the January 5 LOMR follow up on a Conditional Letter of Map Revision (CLOMR) issued on January 25, 1994. All data required to complete our review of this request were submitted with letters from Mr. Bunting and Mr, Aaron B. Egbert, Project Manager, JR Engineering, Ltd. We have completed our review of the submitted data, the data supporting the January 25 CLOMR, the January 5 LOMR, and the flood data shown on the effective FIRM. We have revised the FIRM to modifY the floodplain boundary delineations of the flood having a I-percent chance of being equaled or exceeded in any given year (base flOOd) along Fairfax Creek, from approximately 2,000 feet upstream to approximately 3,360 feet upstream of Potomac Drive, As a result of the channel improvements and culvert construction, the width of the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood, along Fairfax Creek shifted in some areas and decreased in other areas, The base flood is contained in the new channel. The modifications are shown on the enclosed annotated copy of FIRM Panel 0158 B. This LOMR hereby revises the above-referenced panel(s) of the effective FIRM dated December 18, 1986. The modifications are effective as of the date of this letter. The map panel as listed above and as modified by this letter will be used for all flood insurance policies and renewals issued for your community.