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. GloctL 0fl 'i;>il'S Federal Emergency Management Agency Washington, D.C. 20472 CERTIFIED MAIL . RETURN RECEIPT REQUESTED IN REPLY REFER TO: Case No.:9'5).08~24IP The. Honorable Leslie Durgin Mayor, City of Boulder P.O. Box 791 Boulder, Colorado 80306 Community: City of Boulder, Colorado Community No.: 080024 Panel Affected: 08013C0415 F Effective Date of This Revision: NO VOl 1995 102-D-A Dear Mayor Durgin: This is in response to a request for a revision to the effective Flood Insurance Study (FIS) and National Flood Insurance Program (NFIP) map for your community. Specifically, this responds to a letter dated October 5, 1995, from Mr. Curt Parker, P.E., Water Resources Engineer, Transportation Department, Boulder County, regarding the effective FIS report and Flood Insurance Rate Map (FIRM) for Boulder County, Colorado and Incorporated Areas. With his letter, Mr. Parker provided additional data to support a July 27, 1995, request from Mr. Roger L. Mieden, P.E., Drexel Barrell, that the Federal Emergency Management Agency (FEMA) revise the effective FIRM to correct an error in the placement of an elevation of a flood having a I-percent chance of being equaled or exceeded in any given year (base flood) along Dry Creek No.2 Ditch Split Flow just upstream of the Burlington Northern Railroad. All data required to complete our review of this request were submitted with Mr. Mieden's July 27 letter, Mr. Parker's October 5 letter, and a letter dated September 20, 1995, from Ms. Karen S. Medde, P.E., Department of Public Works, City of Boulder. Because this Letter of Map Revision (LOMR) corrects a mapping error, fees were not assessed for the review. We have completed our review of the submitted data and the flood data shown on the effective FIRM and have revised the FIRM to modify the base flood elevation (BFE) along Dry Creek No.2 Ditch Split Flow from just upstream to approximately 600 feet upstream of the Burlington Northern Railroad. As a result of this revision, the BFE shown on the FIRM just upstream of the Burlington Northern Railroad along Dry Creek No.2 Ditch Split Flow was corrected from 5,222 feet to 5,220 feet. The revised BFE reflects the results of the effective hydraulic analysis. The 5,222-foot BFE, incorrectly shown at the railroad on the effective FIRM, was moved approximately 600 feet upstream. In addition, the elevation on Profile Panel 116P for Dry Creek was corrected at the Burlington Northern Railroad from 5,221 feet to 5,220 feet. The modification is shown on the enclosed annotated copy of FIRM Panel 08013C0415 F and Profile Panel 116P for Dry Creek. This LOMR hereby revises this panel of the effective FIRM and the Flood Profile in the FIS report, both dated June 2, 1995.