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<br />, Page 1 of 5 I Issue Date: MAR 2 9 2004 I Effective Date: JUl 1 6 2004 I Case No.: 04-08-0108P I LOMR-APP <br /> Follows Conditional Case No.: 03-08-0032R <br /> \"l~AR.T~ <br /> I.~ Federal Emergency Management Agency <br /> "5 't: Washington, D.C. 20472 <br /> :t:~ v~ <br /> ~-iND stG <br /> LETTER OF MAP REVISION <br /> DETERMINATION DOCUMENT <br /> COMMUNllY AND REVISION INFORMATION PROJECT DESCRIPTION BASIS OF REQUEST <br /> City of Thornton CHANNELIZATION HYDRAULIC ANALYSIS <br /> Adams County CHANNEL RELOCATION HYDROLOGIC ANALYSIS <br /> COMMUNllY Colorado CULVERT NEW TOPOGRAPHIC DATA <br /> FILL <br /> COMMUNllY NO.: 080007 <br /> IDENTIFIER E-470 at Big Dry Creek - North Atea Tributaries APPROXIMATE LATITUDE & LONGITUDE: 40' 0.012',104' 58.859' <br /> SOURCE: USGS QUADRANGLE DATUM: NGVD29 <br /> Mustang Run - from approximately 2,200 feet upstream to approximately 2.800 feet upstream of the confluence with Big Dry , <br /> Creek and from Interstate Highway 25 (1-25) to approximately BOO feet upstream <br /> FLOODING SOURCE(S) & Sack Creek South - from approximately 1,600 feet upstream of the confluence wUh Sack Creek to the dual confluence of . <br /> REVISED REACH(ES) Sack Creek South - North Alignment and Sack Creek South - South Alignment. located approximately 2,100 feet upstream' <br /> of the confluence with Sack Creek <br /> Sack Creek South - North A1igmnent - from the confluence v.;th Sack Creek South to approximately 900 feet upstream of 1-25 <br /> Sack C,eek South - South A1ionment - from the confluence v.;th Sack Creek South to aDoroximateiv 600 feet uostream of 1-25 <br /> SUMMARY OF REVISIONS <br /> Effective Flooding: Zone A <br /> Revised Flooding: Zone A <br /> Increases: YES <br /> Deaeases: YES <br /> .. BFEs - Base Flood Elevations <br /> ANNOTATED MAPPING ENCLOSURES ANNOTATED STUDY ENCLOSURES <br /> lYPE: FIRM' NO.: 08001C0030 G Oate: August 16, 1995 NO REVISION TO THE FLOOD INSURANCE STUDY REPORT <br /> . FIRM - Flood Insurance Rate Map; .. FBFM - Flood Boundary and Roadway Map; ... FHBM - Flood Hazard Boundary Map <br /> DETERMINATION <br /> This document provides the determination from the Department of Homeland Security's Federal Emergency Management Agency (FEMA) <br /> regarding a request for a Letter of Map Revision (LOMR) for the area described above. Using the information submitted, we have <br /> determined that a revision to the flood hazards depicted in the Flood Insurance StUdY (FIS) report andlor National Flood InSurance <br /> Program (NFIP) mapis warranted, This document revises the effective NFIP map, as indicated in the attached documentation. Please <br /> use the enclosed annotated map panels revised by this LOMR for floodplain management purposes and for all flood insurance policies and <br /> renewals in your community. <br /> This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If <br /> you have any questions about this document, please contact the FEMA Map Assistance Cente, toll free at 1-B77-336-2677 (1-877.FEMA MAP) or by letter <br /> addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional information about the NFIP Is available on our website at <br /> htto:/1w.Nw fema.aov/nfio. <br /> 1-.... ~II <br /> '''' <br /> Doug Bellomo, P.E., CFM, Acting Chief <br /> Hazard Identification Section <br /> Mitigation Division <br /> Emeraencv PreDaredness and Response Directorate 102426D.AU40801081021C <br />