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2 , ," ... As a result of the proposed extension of the 66-inch-diameter RCP, the base flood will be contained in the storm sewer system composed of the 72-inch-diameter RCP, the lO-foot by lO-foot RCB, and the existing and extended 66-inch-diameter RCPs along Fourmile Gulch from its confluence with North Clear Creek to approximately 1,135 feet upstream. As a result of the more detailed topographic information and proposed extension of the 66-inch-diameter RCP, the water-surface elevations (WSELs) associated with the base flood along Fourmile Gulch will increase and decrease compared to the effective base flood WSELs. The maximum increase in base flood WSEL, 2.5 feet, will occur approximately 1,035 feet upstream ofSHl19. The maximum decrease in base flood WSEL, 0.1 foot, will occur approximately 1,080 feet upstream ofSH1l9. All increases in base flood WSEL will be contained within the wing walls of the inlet structure to the extended 66-inch-diameter RCP. As a result of the more detailed topographic information and proposed extension of the 66-inch-diameter RCP, the width of the SFHA will decrease compared to the effective SFHA width. The maximum decrease in SFHA width, approximately 200 feet, will occur approximately 50 feet upstream of SH1l9. 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 FrS report. . Detailed application and certification forms, 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, Form 1, entitled "Revision Requester and Community Official Form," must be included. (A copy of this form is enclosed.) ..~ . The detailed application and certification forms listed below may be required if as-built conditions differ from the typical plans. If required, please submit new forms (copies of which are enclosed) or annotated copies of the previously submitted forms showing the revised information. Form 3, entitled "Hydrologic Analysis Form" Form 4, entitled "Riverine Hydraulic Analysis Form" Form 5, entitled "Riverine/Coastal Mapping Form" Form 6, entitled "Channelization Form" . Effective June 1, 2000, FEMA revised the fee schedule for reviewing and processing requests for conditional and final modifications to published flood information and maps. In accordance with this schedule, the current fee for this map revision request is $3,400 and must be received before we can begin processing the request. Please note, however, that the fee schedule is subject to change, and requesters are required to submit the fee in effect at the time of the submittal. Payment of this fee shall be made in the form of a check or money order, made payable in U.S. funds to the National Flood Insurance Program, or by credit card. The payment must be forwarded to the following address: ... Federal Emergency Management Agency Fee-Charge System Administrator P.O. Box 3173 Merrifield, VA 221 16-3173