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2 We reviewed the submitted data and the data used to prepare the effective FIRM for your community and detennined that the proposed project meets the minimum floodplain management criteria of the NFIP. The submitted existing conditions HEC-2 hydraulic computer model, dated March 23, 2000, based on updated topographic infonnation, was used as the base conditions model in our review of the proposed conditions model for this CLOMR request. We believe that, if the proposed project is constructe~ as shown on submitted plans entitled "San Miguel Corridor Restoration Plan - Project Conditions Work Map," certified by Mr. Wolff on April 13, 2000; and "San Miguel Corridor Restoration Plan - Layout Plan" dated March 30, 2000; and as described in the report entitled "Application for Conditional Letter of Map Revision - San Miguel Corridor Restoration Plan, Telluride, Colorado," dated April, 2000, both prepared by Mussetter Engineering, Inc.; and the data listed below are received, a revision to the FIRM would be warranted. Because this revision request also affects the Town of Telluride, a separate CLOMR for that community was issued on the same date as this CLOMR. The existing conditions model incorporates updated topographic infonnation along the San Miguel River from approximately 300 feet downstream to approximately 3,100 feet upstream of Maple Street. Our review of the existing conditions model revealed that within the unincorporated areas of San Miguel County the elevations of the flood having a I-percent chance of being equaled or exceeded in any given year (base flood) increased along the San Miguel River compared to the Base Flood Elevations (BFEs) shown on the effective flood profile. In addition, the width of the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood, increased when compared to the effective SFHA width. The maximum increase in BFE, approximately 1.2 foot, and the maximum increase in SFHA width, approximately 150 feet, both occurred approximately 400 feet upstream of Pine Street. All increases are due to more detailed topographic infonnation and natural changes to the existing stream channel. The proposed conditions HEC-2 hydraulic computer model incorporates the San Miguel River Corridor Restoration Project into the existing conditions model. Our review of this proposed conditions model revealed that within the unincorporated areas of San Miguel County no increases or decreases in BFE occurred when compared to the existing conditions model. Upon completion of the project, your community may submit the data listed below and request that we make a final determination on revising the effective FIRM and FIS report. J}:' . Detailed application and certification fonns, which were used in processing this request, must be used for requesting final revisions to the maps. Therefore, when the map revision request for the area covered by this letter is submitted, Fonn 1, entitled "Revision Requester and Community Official Fonn," must be included. (A copy of this form is enclosed.) After receiving appropriate documentation to show that the project has been completed, FEMA will initiate a revision to the FIRM and FIS report. Because the BFEs would change as a result ofthe project, a 90-day appeal period would be initiated, during which community officials and interested persons may appeal the revised BFEs based on scientific or technical data.