Federal Emergency Management Agency

Transcription

1 Page 1 of 6 Issue Date: May Case No.: Follows Conditional Case No.: R DETERMINATION DOCUMENT COMMUNITY AND REVISION INFORMATION PROECT DESCRIPTION BASIS OF REQUEST COMMUNITY Village of Elmwood Park Cook County Illinois LEVEE FLOODWAY HYDRAULIC ANALYSIS LEVEE CERTIFICATION NEW TOPOGRAPHIC DATA COMMUNITY NO.: IDENTIFIER Elmwood Park Flood Mitigation Project ANNOTATED MAPPING ENCLOSURES APPROXIMATE LATITUDE & LONGITUDE: SOURCE: Other DATUM: NAD 83 ANNOTATED STUDY ENCLOSURES TYPE: FIRM* NO.: 17031C DATE: August DATE OF EFFECTIVE FLOOD INSURANCE STUDY: August PROFILES: 147P FLOODWAY DATA TABLE: 19 Enclosures reflect changes to flooding sources affected by this revision. * FIRM - Flood Insurance Rate Map FLOODING SOURCES & REVISED REACHES See Page 2 for Additional Flooding Sources Des Plaines River - From approximately 150 feet downstream of Cross Section AM to approximately 950 feet upstream of Cross Section AM Golf Course Tributary - From approximately 4100 feet downstream of Fullerton Avenue to Fullerton Avenue SUMMARY OF REVISIONS Flooding Source Effective Flooding Revised Flooding Increases Decreases Des Plaines River Zone AE Zone AE NONE YES Zone X (shaded) Zone X (shaded) NONE YES Golf Course Tributary Zone AE Zone AE NONE YES Floodway Floodway YES YES DETERMINATION 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 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.

2 Page 2 of 6 Issue Date: May Case No.: OTHER FLOODING SOURCES AFFECTED BY THIS REVISION FLOODING SOURCE & REVISED REACH Golf Course Tributary - From approximately 4100 feet downstream of Fullerton Avenue to Fullerton Avenue SUMMARY OF REVISIONS Flooding Source Effective Flooding Revised Flooding Increases Decreases Golf Course Tributary BFEs* BFEs NONE YES Zone X (shaded) Zone X (shaded) NONE YES * BFEs - Base Flood Elevations

3 Page 3 of 6 Issue Date: May Case No.: OTHER COMMUNITIES AFFECTED BY THIS REVISION CID Number: Name: Village of River Grove Illinois AFFECTED MAP PANELS AFFECTED PORTIONS OF THE FLOOD INSURANCE STUDY REPORT TYPE: FIRM NO.: 17031C DATE: August DATE OF EFFECTIVE FLOOD INSURANCE STUDY : August PROFILES: 147P FLOODWAY DATA TABLE: 19

4 Page 4 of 6 Issue Date: May Case No.: 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 ) 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 ) 42 U.S.C 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/Commonwealth or local requirements to which the regulations apply. We provide the floodway designation to your community as a tool to regulate floodplain development. Therefore the floodway revision we have described in this letter while acceptable to us must also be acceptable to your community and adopted by appropriate community action as specified in Paragraph 60.3(d) of the NFIP regulations. COMMUNITY REMINDERS We based this determination on the 1-percent-annual-chance flood discharges computed in the FIS for your community without considering subsequent changes in watershed characteristics that could increase flood discharges. Future development of projects upstream could cause increased flood discharges which could cause increased flood hazards. A comprehensive restudy of your community s flood hazards would consider the cumulative effects of development on flood discharges subsequent to the publication of the FIS report for your community and could therefore establish greater flood hazards 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 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.

5 Page 5 of 6 Issue Date: May Case No.: 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. Christine Stack Director Mitigation Division Region V 536 South Clark Street Sixth Floor Chicago IL (312) STATUS OF THE COMMUNITY NFIP MAPS We will not physically revise and republish the FIRM and FIS report for your community to reflect the modifications made by this LOMR at this time. When changes to the previously cited FIRM panel and FIS report warrant physical revision and republication in the future we will incorporate the modifications made by this LOMR at that time.

6 Page 6 of 6 Issue Date: May Case No.: PUBLIC NOTIFICATION OF REVISION A notice of changes will be published in the Federal Register. This information also will be published in your local newspaper on or about the dates listed below and through FEMA s Flood Hazard Mapping website at LOCAL NEWSPAPER Name: Chicago Tribune Dates: May and May Within 90 days of the second publication in the local newspaper a citizen may request that we reconsider this determination. Any request for reconsideration must be based on scientific or technical data. Therefore this letter will be effective only after the 90 day appeal period has elapsed and we have resolved any appeals that we receive during this appeal period. Until this LOMR is effective the revised flood hazard information presented in this LOMR may be changed.

7 FLOODING SOURCE CROSS SECTION DISTANCE WIDTH (FEET) FLOODWAY SECTION AREA (SQUARE FEET) MEAN VELOCITY (FEET PER SECOND) 1-PERCENT-ANNUAL-CHANCE-FLOOD WATER SURFACE ELEVATION (FEET NAVD) REGULATORY WITHOUT FLOODWAY WITH FLOODWAY INCREASE (FEET) Flossmoor Ditch A B C D E Flossmoor Ditch Tributary A A B C D E Golf Course Tributary A B C D Feet above mouth 10 Feet above confluence with Des Plaines River 45 Feet above confluence at Union Drainage Ditch REVISED DATA TABLE 19 FEDERAL EMERGENCY MANAGEMENT AGENCY COOK COUNTY IL AND INCORPORATED AREAS FLOODWAY DATA FLOSSMOOR DITCH FLOSSMOOR DITCH TRIBUTARY A GOLF COURSE TRIBUTARY REVISED TO REFLECT LOMR EFFECTIVE: SEPTEMBER

8 ELEVATION IN FEET (NAVD 88) CULVERT INLET FULLERTON AVENUE LIMIT OF DETAILED STUDY REVISED REACH FLOOD PROFILES GOLF COURSE TRIBUTARY A B C D LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION FEDERAL EMERGENCY MANAGEMENT AGENCY COOK COUNTY IL AND INCORPORATED AREAS STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH DES PLAINES RIVER 147P REVISED TO REFLECT LOMR EFFECTIVE: SEPTEMBER

9 D 77TH CT 78TH AVE FULLERTON AVE Village of Elmwood Park Note: This area is shown as being protected from the 1-percent-annualchance or greater flood hazard by a levee system. Overtopping or failure of any levee system is possible. BELDEN AVE TH CT C REVISED AREA Profile Baseline Note: This area is shown as being protected from the 1-percent-annualchance or greater flood hazard by a levee system. Overtopping or failure of any levee system is possible. 77TH AVE B AM.0 SCALE Map Projection: NAD 1983 UTM Zone 16N; Western Hemisphere; Vertical Datum: NAVD 88 CH AT TH 77TH AVE Feet Meters 300 COOK COUNTY ILLINOIS AND INCORPORATED AREAS 77TH CT ) ) 78TH AVE 1: FLOOD INSURANCE RATE MAP PANEL Note: This area is shown as being protected from the 1-percent-annualchance or greater flood hazard by a levee system. Overtopping or failure of any levee system is possible. 78TH CT r 79TH AVE Rive 79TH CT ines 0.2% Annual Chance Flood Hazard Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mile Zone X Future Conditions 1% Annual Chance Flood Hazard Zone X Area with Reduced Flood Risk due to Levee See Notes. Zone X NATIONAL FLOOD INSURANCE PROGRAM OF Panel Contains: SUFFIX COMMUNITY NUMBER PANEL COOK COUNTY ELMWOOD PARK VILLAGE OF MELROSE PARK VILLAGE OF RIVER FOREST VILLAGE OF RIVER GROVE VILLAGE OF CHICAGO CITY OF BLOOMINGDALE AVE Pla Zone AE AO AH VE AR Regulatory Floodway OTHER AREAS OF FLOOD HAZARD 0 CORTLAND ST CORTLAND PKWY Des SPECIAL FLOOD HAZARD AREAS 0 Floodwall 625 With BFE or Depth 1 inch = 500 feet COUNTRY CLUB LN ZONE AE ) ARMITAGE AVE 75TH AVE TH CT A CORTLAND ST BRIDLE PATH Zone AV A99 76TH AVE Culvert ) Without Base Flood Elevation (BFE) DICKENS AVE REVISED TO REFLECT LOMR EFFECTIVE: SEPTEMBER PALMER ST 76TH CT E R RD Golf Course Tributary FT Note: This area is shown as being protected from the 1-percent-annualchance or greater flood hazard by a levee system. Overtopping or failure of any levee system is possible. ZONE AE 62 THATCH Village of River Grove OINS PANEL 0395 FULLERTON AVE 78TH CT 79TH AVE 80TH AVE HAYMOND ST DAVISSON ST ERIE ST LIMIT OF STUDY VERSION NUMBER ER E AV WABANSIA AVE MAP NUMBER 17031C EFFECTIVE DATE AUGUST