Page 1 of 4 Issue Date: September 15, 2008 Effective Date: September 29, 2008 Case No.: 08-09-1660P LOMR-APP Washington, D.C. 20472 Federal Emergency Management Agency LETTER OF MAP REVISION DETERMINATION DOCUMENT COMMUNITY AND REVISION INFORMATION PROJECT DESCRIPTION COMMUNITY APPROXIMATE LATITUDE & LONGITUDE: 34.412, -118.670 SOURCE: Other DATUM: NAD 83 Los Angeles County California (Unincorporated Areas) COMMUNITY NO.: 065043 BASIS OF REQUEST IDENTIFIER NO PROJECT MAP UPDATE Newhall Ranch and Castaic Junction ANNOTATED MAPPING ENCLOSURES ANNOTATED STUDY ENCLOSURES TYPE: FIRM* NO.: 06037C0800 F DATE: September 26, 2008 NO REVISION TO THE FLOOD INSURANCE STUDY REPORT Enclosures reflect changes to flooding sources affected by this revision. * FIRM - Flood Insurance Rate Map; ** FBFM - Flood Boundary and Floodway Map; *** FHBM - Flood Hazard Boundary Map FLOODING SOURCE(S) & REVISED REACH(ES) San Martinez Grande Canyon Creek – from approximately 300 feet upstream to approximately 1,500 feet upstream of the confluence with the Santa Clara River SUMMARY OF REVISIONS This Letter of Map Revision (LOMR) is an update to FIRM Panel 06037C0800 F. This FIRM panel is included in a new countywide FIRM and Flood Insurance Study (FIS) report for Los Angeles County and its incorporated areas that is scheduled to become effective on September 26, 2008. The new FIRM and FIS report only partially incorporated a LOMR dated July 2, 2002 (Case No. 01-09-559P), which revised the Special Flood Hazard Areas (SFHAs), the areas that would be inundated by the base (1-percent-annual-chance) flood, along San Martinez Grande Canyon Creek. This LOMR updates FIRM Panel No. 06037C0800 F to entirely incorporate the July 2 LOMR along San Martinez Grande Canyon Creek, thereby superseding the September 26 FIRM Panel for the revision area. This LOMR does not revise the SFHA boundaries from the July 2 LOMR along this revised reach. DETERMINATION This document provides the determination from the Department of Homeland Security's Federal Emergency Management Agency (FEMA) regarding a request for a LOMR for the area described above. Using the information submitted, we have determined that a revision to the flood hazards depicted in the FIS report and/or National Flood Insurance Program (NFIP) map is warranted. This document revises the effective NFIP map, as indicated in the attached documentation. Please use the enclosed annotated map panels revised by this LOMR for floodplain management purposes and for all flood insurance policies and renewals in your community. This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip. 112553 10.3.1.08091660 102-IAC Craig S. Kennedy, CFM, Program Specialist Engineering Management Branch Mitigation Directorate Page 2 of 4 Issue Date: September 15, 2008 Effective Date: September 29, 2008 Case No.: 08-09-1660P LOMR-APP Washington, D.C. 20472 Federal Emergency Management Agency LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) COMMUNITY INFORMATION APPLICABLE NFIP REGULATIONS/COMMUNITY OBLIGATION We have made this determination pursuant to Section 206 of the Flood Disaster Protection Act of 1973 (P.L. 93-234) and in accordance with the National Flood Insurance Act of 1968, as amended (Title XIII of the Housing and Urban Development Act of 1968, P.L. 90-448), 42 U.S.C. 4001-4128, and 44 CFR Part 65. Pursuant to Section 1361 of the National Flood Insurance Act of 1968, as amended, communities participating in the NFIP are required to adopt and enforce floodplain management regulations that meet or exceed NFIP criteria. These criteria, including adoption of the FIS report and FIRM, and the modifications made by this LOMR, are the minimum requirements for continued NFIP participation and do not supersede more stringent State or local requirements to which the regulations apply. COMMUNITY REMINDERS Your community must regulate all proposed floodplain development and ensure that permits required by Federal and/or State law have been obtained. State or community officials, based on knowledge of local conditions and in the interest of safety, may set higher standards for construction or may limit development in floodplain areas. If your State or community has adopted more restrictive or comprehensive floodplain management criteria, those criteria take precedence over the minimum NFIP requirements. We will not print and distribute this LOMR to primary users, such as local insurance agents or mortgage lenders; instead, the community will serve as a repository for the new data. We encourage you to disseminate the information in this LOMR by preparing a news release for publication in your community's newspaper that describes the revision and explains how your community will provide the data and help interpret the NFIP maps. In that way, interested persons, such as property owners, insurance agents, and mortgage lenders, can benefit from the information. This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip. 112553 10.3.1.08091660 102-IAC Craig S. Kennedy, CFM, Program Specialist Engineering Management Branch Mitigation Directorate Page 3 of 4 Issue Date: September 15, 2008 Effective Date: September 29, 2008 Case No.: 08-09-1660P LOMR-APP Washington, D.C. 20472 Federal Emergency Management Agency LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) We have designated a Consultation Coordination Officer (CCO) to assist your community. The CCO will be the primary liaison between your community and FEMA. For information regarding your CCO, please contact: Ms. Sally M. Ziolkowski Director, Mitigation Division Federal Emergency Management Agency, Region IX 1111 Broadway Street, Suite 1200 Oakland, CA 94607-4052 (510) 627-7175 STATUS OF THE COMMUNITY NFIP MAPS We are processing a FIRM and FIS report in countywide format for Los Angeles County, California and Incorporated Areas. The countywide FIRM and FIS report, which include flood hazard information for your community, will become effective on September 26, 2008. Because the effective date has already been established, we will not incorporate the modifications made by this LOMR into the countywide FIRM before it becomes effective. However, the modifications made by this LOMR will supersede the new countywide FIRM for the revision area after it becomes effective. This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip. 112553 10.3.1.08091660 102-IAC Craig S. Kennedy, CFM, Program Specialist Engineering Management Branch Mitigation Directorate Page 4 of 4 Issue Date: September 15, 2008 Effective Date: September 29, 2008 Case No.: 08-09-1660P LOMR-APP Washington, D.C. 20472 Federal Emergency Management Agency LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) PUBLIC NOTIFICATION OF REVISION This revision will become effective on September 29, 2008. Any requests to review or alter this determination should be made within 30 days and must be based on scientific or technical data. This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMR Depot, 3601 Eisenhower Avenue, Alexandria, VA 22304. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip. 112553 10.3.1.08091660 102-IAC Craig S. Kennedy, CFM, Program Specialist Engineering Management Branch Mitigation Directorate 943 939 939 935 935 931 931 927 927 925 925 922 922 919 919 915 915 913 913 911 911 909 909 905 905 901 901 898 898 895 895 891 891 886 886 883 883 879 879 875 875 871 871 869 869 867 867 863 863 859 859 ZONE D ZONE D ZONE A ZONE A ZONE AE ZONE AE ZONE AE ZONE AE LIMIT OF STUDY LIMIT OF STUDY LOS ANGELES COUNTY UNINCORPORATED AREAS 065043 LOS ANGELES COUNTY UNINCORPORATED AREAS 065043 EW4649 Landing Strip Landing Strip RAILROAD RAILROAD REVISED AREA REVISED AREA San Martinez Grande Canyon Creek San Martinez Grande Canyon Creek San Martinez Chiquito Canyon San Martinez Chiquito Canyon Santa Clara River Santa Clara River 126 CHIQUITO CANYON RD CHIQUITO CANYON RD Potrero Canyon Creek Potrero Canyon Creek ZONE A ZONE D ZONE D LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY MAP SCALE 1" = 2000' NATIONAL FLOOD INSURANCE PROGRAM NFIP Federal Emergency Management Agency Notice to User: The shown below should be used when placing map orders; the shown above should be used on insurance applications for the subject community. Community Number Map Number FIRM FLOOD IN S URANCE RATE MAP PANEL 0800F CONTAINS: COMMUNITY NUMBER PANEL SUFFIX MAP NUMBER 06037C0800F SEPTEMBER 26, 2008 PANEL 800 OF 2350 (SEE MAP INDEX FOR FIRM PANEL LAYOUT) LOS ANGELES COUNTY, CALI FORNIA LOS ANGELES COUNTY 065043 0800 F AND INCORPORATED AREAS EFFECTIVE DATE: 1,000 500 0 1,000 2,000 3,000 4,000 Feet 600 300 0 600 1,200 Meters Legend 1% annual chance (100-Year) Floodway 1% annual chance (100-Year) Floodplain 0.2% annual chance (500-Year) Floodplain