Federal Emergency Management Agency

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1 Page 1 of 4 Issue Date: May 28, 21 Effective Date: May 28, 21 Follows Conditional Case o.: Case o.: P R ington, D.C LETTER OF MAP REVISIO DETERMIATIO DOCUMET COMMUITY AD REVISIO IFORMATIO PROJECT DESCRIPTIO BASIS OF REQUEST COMMUITY City of Bullhead City Mohave County Arizona CHAELIZATIO CULVERT EXCAVATIO FILL LEVEE ALLUVIAL FA AALYSIS HYDROLOIC AALYSIS HYDRAULIC AALYSIS EW TOPORAPHIC DATA COMMUITY O.: 4125 IDETIFIER Mohave Crossroads AOTATED MAPPI ECLOSURES APPROXIMATE LATITUDE & LOITUDE: 35.6, SOURCE: FIRM Panel DATUM: 83 AOTATED STUDY ECLOSURES TYPE: FIRM* TYPE: FIRM O.: 415C4761 O.: 415C4762 DATE: ovember 18, 29 DATE: ovember 18, 29 O REVISIO TO THE FLOOD ISURACE STUDY REPORT Enclosures reflect changes to flooding sources affected by this revision. *FIRM - Flood Insurance Rate Map FLOODI SOURCE(S) & REVISED REACH(ES) Richardo From approximately 4,45 feet downstream of Terra Loma Road to approximately 35 feet upstream of Route 95 Shadow Canyon Overflow - From the confluence with Ricardo to the divergence with Shadow Canyon Fort Mohave - From approximately 1, feet downstream of Route 95 to approximately 4, feet upstream SUMMARY OF REVISIOS Flooding Source Effective Flooding Revised Flooding Increases Decreases Richardo Shadow Canyon Overflow Fort Mohave Zone AE Zone X (shaded) Contained Contained Zone A DETERMIATIO This document provides the determination from the Department of Homeland Security's (FEMA) regarding a request for a Letter of Map Revision (LOMR) for the area described above. Using the information submitted, we have determined that a revision to the flood hazards depicted in the Flood Insurance Study (FIS) report and/or ational Flood Insurance Program (FIP) map is warranted. This document revises the effective FIP 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. LOMC Clearinghouse, 673 Santa Barbara Court, Elkridge, MD Additional Information about the FIP is available on our website at Beth A. orton, Program Specialist D

2 Page 2 of 4 Issue Date: May 28, 21 Effective Date: May 28, 21 Case o.: P ington, D.C LETTER OF MAP REVISIO DETERMIATIO DOCUMET (COTIUED) COMMUITY IFORMATIO APPLICABLE FIP REULATIOS/COMMUITY OBLIATIO We have made this determination pursuant to Section 26 of the Flood Disaster Protection Act of 1973 (P.L ) and in accordance with the ational Flood Insurance Act of 1968, as amended (Title XIII of the Housing and Urban Development Act of 1968, P.L ), 42 U.S.C , and 44 CFR Part 65. Pursuant to Section 1361 of the ational Flood Insurance Act of 1968, as amended, communities participating in the FIP are required to adopt and enforce floodplain management regulations that meet or exceed FIP criteria. These criteria, including adoption of the FIS report and FIRM, and the modifications made by this LOMR, are the minimum requirements for continued FIP participation and do not supersede more stringent State/Commonwealth or local requirements to which the regulations apply. FIP regulations Subparagraph 6.3(b)(7) requires communities to ensure that the flood-carrying capacity within the altered or relocated portion of any watercourse is maintained. This provision is incorporated into your community s existing floodplain management ordinances; therefore, responsibility for maintenance of the altered or relocated watercourse, including any related appurtenances such as bridges, culverts, and other drainage structures, rests with your community. We may request that your community submit a description and schedule of maintenance activities necessary to ensure this requirement. COMMUITY REMIDERS We based this determination on the 1-percent-annual-chance discharges computed in the submitted hydrologic model. Future development of projects upstream could cause increased discharges, which could cause increased flood hazards. A comprehensive restudy of your community s flood hazards would consider the cumulative effects of development on discharges and could, therefore, indicate that greater flood hazards exist in this area. Your community must regulate all proposed floodplain development and ensure that permits required by Federal and/or State/Commonwealth law have been obtained. State/Commonwealth 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/Commonwealth or community has adopted more restrictive or comprehensive floodplain management criteria, those criteria take precedence over the minimum FIP 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 FIP maps. In that way, interested persons, such as property owners, insurance agents, and mortgage lenders, can benefit from the information. This revision has met our criteria for removing an area from the 1-percent-annual-chance floodplain to reflect the placement of fill. However, we encourage you to require that the lowest adjacent grade and lowest floor (including basement) of any structure placed within the subject area be elevated to or above the Base (1-percent-annual-chance) Flood Elevation. LOMC Clearinghouse, 673 Santa Barbara Court, Elkridge, MD Additional Information about the FIP is available on our website at Beth A. orton, Program Specialist D

3 Page 3 of 4 Issue Date: May 28, 21 Effective Date: May 28, 21 Case o.: P ington, D.C LETTER OF MAP REVISIO DETERMIATIO DOCUMET (COTIUED) 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, Region IX 1111 Broadway Street, Suite 12 Oakland, CA (51) STATUS OF THE COMMUITY FIP MAPS We will not physically revise and republish the FIRM for your community to reflect the modifications made by this LOMR at this time. When changes to the previously cited FIRM panel(s) warrant physical revision and republication in the future, we will incorporate the modifications made by this LOMR at that time. LOMC Clearinghouse, 673 Santa Barbara Court, Elkridge, MD Additional Information about the FIP is available on our website at Beth A. orton, Program Specialist D

4 Page 4 of 4 Issue Date: May 28, 21 Effective Date: May 28, 21 Case o.: P ington, D.C LETTER OF MAP REVISIO DETERMIATIO DOCUMET (COTIUED) COMMUITY IFORMATIO (COTIUED) This revision is effective as of the date of this letter. Any requests to review or alter this determination should be made within 3 days and must be based on scientific or technical data. LOMC Clearinghouse, 673 Santa Barbara Court, Elkridge, MD Additional Information about the FIP is available on our website at Beth A. orton, Program Specialist D

5 2 3 ZOE AE M 262 Î ZOE AH (ELEV 489') (ELEV 489) Fox 9 MAP SCALE 1" = 5' 5 FEET METERS 15 Richardo EFFECTIVE DATE OVEMBER 18, 29 ASH RICHARDO RO CITY OF BULLHE CITY 4125 RY CETRAL RO KYLE UE DEL AELIS UE FORT MOJ IDIA RESERVATIO 4133 BURR RO CHILDRESS RO MAP UMBER 415C4761 KALIL RO otice to User: The Map umber shown below should be used when placing map orders; the Community umber shown above should be used on insurance applications for the subject community. REVISED TO REFLECT LOMR EFFECTIVE: May 28, 21 DA U BO UMBER PAEL SUFFIX MOH COUTY BULLHE CITY, CITY OF FORT MOJ IDIA TRIBE RV AT IO (SEE MAP IDEX FOR FIRM PAEL LAYOUT) COTAIS: DRIVE PAEL 4761 OF 67 AD ICORPORATED AREAS COMMUITY RE SE JOSE ARIZOA MARIPOSA RO BOY MOH COUTY, RUSH RO FIRM FLOOD ISURACE RATE MAP PAEL 4761 REVISED AREA FT TERRA LOMA 25 MILLAR RO 48.2% annual chance (5-Year) Floodplain 11 1 TERRA LOMA DR ZOE AH Fort Mohave 1% AUAL CHACE FLOOD DISCHARE COTAIED I CHAEL (1-Year) Floodway ZOE A Legend (1-Year) Floodplain BULLHE PKWY JOIS PAEL

6 (1-Year) Floodway '37.5" 35 3'45".2% annual chance (5-Year) Floodplain JOIS PAEL m E 1 95 P 25 ZOE AH 15 (EL 516) Fox FIRM FLOOD ISURACE RATE MAP MOH COUTY, 2 ARIZOA AD ICORPORATED AREAS PAEL 4762 OF 67 (VEL 6 FPS) (SEE MAP IDEX FOR FIRM PAEL LAYOUT) COTAIS: COMMUITY (VEL 6 FPS) BULLH (VEL 5 FPS) 1% AUAL CHACE FLOOD DISCHARE COTAIED I CHAEL Fort ORTH RO Mohave EFFECTIVE DATE OVEMBER 18, 29 Mohave County Unincorporated Areas 458 LORIA RD ORTH RO FROTAE RO MAP UMBER 415C4762 (VEL 5 FPS) LO otice to User: The Map umber shown below should be used when placing map orders; the Community umber shown above should be used on insurance applications for the subject community. ZOE A REVISED TO REFLECT LOMR EFFECTIVE:May 28, 21 Soto Levee UMBER PAEL SUFFIX MOH COUTY BULLHE CITY, CITY OF RKWAY E PA MAP SCALE 1" = 5' 5 FEET METERS 15 PAEL 4762 JOIS PAEL % AUAL CHACE FLOOD DISCHARE COTAIED I CHAEL ZOE A 95 P AE DEL LIS CETRAL KYLE RISI SU RO A CORWI RO W VIE A I T RO CACTUS CT SHOW CAYO RO TH ER ST H ZOE AE U 667 SA TA FE WOLF RO LIMIT OF DETAILED STUDY I E E TA 6 D FRO RO U MO I CT P 55 REVISED B AREA Shadow Canyon CITY OF Overflow C BULLHE CITY B Shadow Canyon 568 ACY RO KALIL RO 544 1% AUAL CHACE FLOOD DISCHARE COTAIED I CHAEL CORW OTTIHAM DR 54 A F 623 JUE RO C 1% AUAL CHACE WE FLOOD DISCHARE DEL L AV COTAIED I CULVERT E 584 JO A CHRISTO PHER ST RO O OR RICHARDO RO MAY ST RICHARDO RO 668 ZOE AE DR 'S A LO RO K W HA MA L TO (VEL 7 FPS) Richardo LORIA EM ST 638 ASH RO KI RO m Legend (1-Year) Floodplain