SHEBOYGAN COUNTY, WISCONSIN, AND INCORPORATED AREAS Community Community Name Number *ADELL, VILLAGE OF 550075 CASCADE, VILLAGE OF 550425 CEDAR GROVE, VILLAGE OF 550076 *ELKHART LAKE, VILLAGE OF 550564 GLENBEULAH, VILLAGE OF 550570 HOWARDS GROVE, VILLAGE OF 550608 KOHLER, VILLAGE OF 550426 OOSTBURG, VILLAGE OF 550427 PLYMOUTH, CITY OF 550428 RANDOM LAKE, VILLAGE OF 550429 SHEBOYGAN, CITY OF 550430 SHEBOYGAN FALLS, CITY OF 550431 SHEBOYGAN COUNTY UNINCORPORATED AREAS 550424 WALDO, VILLAGE OF 550432 * NO SPECIAL FLOOD HAZARD AREAS IDENTIFIED APRIL 2, 2009 Federal Emergency Management Agency FLOOD INSURANCE STUDY NUMBER 55117CV000A Sheboygan County, Wisconsin and Incorporated Areas NOTICE TO FLOOD INSURANCE STUDY USERS Communities participating in the National Flood Insurance Program have established repositories of flood hazard data for floodplain management and flood insurance purposes. This Flood Insurance Study (FIS) may not contain all data available within the repository. It is advisable to contact the community repository for any additional data. The Federal Emergency Management Agency (FEMA) may revise and republish part or all of this Preliminary FIS report at any time. In addition, FEMA may revise part of this FIS report by the Letter of Map Revision (LOMR) process, which does not involve republication or redistribution of the FIS report. Therefore, users should consult community officials and check the Community Map Repository to obtain the most current FIS components. Selected Flood Insurance Rate Map panels for this community contain information that was previously shown separately on the corresponding Flood Boundary and Floodway Map panels (e.g., floodways and cross sections). In addition, former flood hazard zone designations have been changed as follows. Old Zone(s) New Zone A1 through A30 AE B X C X Initial Countywide FIS Effective Date: April 2, 2009 TABLE OF CONTENTS Page 1.0 INTRODUCTION 1 1.1 Purpose of Study 1 1.2 Authority and Acknowledgments 1 1.3 Coordination 4 2.0 AREA STUDIED 6 2.1 Scope of Study 6 2.2 Community Description 8 2.3 Principal Flood Problems 9 2.4 Flood Protection Measures 10 3.0 ENGINEERING METHODS 12 3.1 Hydrologic Analyses 12 3.2 Hydraulic Analyses 18 3.3 Vertical Datum 25 4.0 FLOODPLAIN MANAGEMENT APPLICATIONS 26 4.1 Floodplain Boundaries 26 4.2 Floodways 27 5.0 INSURANCE APPLICATIONS 43 6.0 FLOOD INSURANCE RATE MAP 44 7.0 OTHER STUDIES 44 8.0 LOCATION OF DATA 47 9.0 BIBLIOGRAPHY AND REFERENCES 47 i TABLE OF CONTENTS - continued Page FIGURES FIGURE 1 – TRANSECT SCHEMATIC 15 FIGURE 2 – FLOODWAY SCHEMATIC 43 TABLES TABLE 1 – INITIAL AND FINAL CCO MEETINGS 5 TABLE 2 – FLOODING SOURCES STUDIED BY DETAILED METHODS 6 TABLE 3 – SUMMARY OF DISCHARGES 15 TABLE 4 – TRANSECT DATA 21 TABLE 5 – MANNING'S "N" VALUES 24 TABLE 6 – FLOODWAY DATA 29 TABLE 7 – COMMUNITY MAP HISTORY 45 EXHIBITS EXHIBIT 1 - Flood Profiles Batavia Creek Panels 01P - 02P Black River Panel 03P Black River Tributary No. 2 Panel 04P Fisher Creek Panels 05P - 06P Fisherman’s Creek Panels 07P - 08P LaBudde Creek Panel 09P Mullet River Panels 10P - 18P North Branch Milwaukee River Panels 19P - 23P Onion River Panels 24P - 28P Pigeon River Panels 29P - 33P Random Lake – Unnamed Tributary to Silver Creek Panel 34P Sheboygan River Panels 35P - 55P Silver Creek Panels 56P - 57P EXHIBIT 2 - FLOOD INSURANCE RATE MAP INDEX FLOOD INSURANCE RATE MAP ii FLOOD INSURANCE STUDY SHEBOYGAN COUNTY, WISCONSIN AND INCORPORATED AREAS 1.0 INTRODUCTION 1.1 Purpose of Study This countywide Flood Insurance Study (FIS) revises and updates the FISs/Flood Insurance Rate Maps (FIRMs), Flood Hazard Boundary Maps (FHBMs) and Flood Boundary Floodway Maps (FBFMs) for the geographic area of Sheboygan County, Wisconsin, including the Cities of Plymouth, Sheboygan, and Sheboygan Falls, the Villages of Adell, Cascade, Cedar Grove, Elkhart Lake, Glenbeulah, Howards Grove, Kohler, Oostburg, Random Lake, and Waldo, and the unincorporated areas of Sheboygan County (hereinafter referred to collectively as Sheboygan County). Please note that the Villages of Adell and Elkhart Lake have no special flood hazard areas identified. Also note that the Villages of Adell, Cedar Grove, Elkhart Lake, Glenbuelah, Howards Grove, Oostburg and Waldo did not have previous FIS text. This FIS aids in the administration of the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. This FIS has developed flood risk data for various areas of the county that will be used to establish actuarial flood insurance rates. This information will also be used by Sheboygan County to update existing floodplain regulations as part of the Regular Phase of the NFIP, and will also be used by local and regional planners to further promote sound land use and floodplain development. Minimum floodplain management requirements for participation in the NFIP are set forth in the Code of Federal Regulations at 44 CFR, 60.3. In some states or communities, floodplain management criteria or regulations may exist that are more restrictive or comprehensive than the minimum Federal requirements. In such cases, the more restrictive criteria take precedence and the State (or other jurisdictional agency) will be able to explain them. 1.2 Authority and Acknowledgments The sources of authority for this FIS are the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. Information on the authority and acknowledgment for each jurisdiction and all unincorporated areas included in this countywide FIS, as compiled from previously printed FIS reports, is shown below. 1 Plymouth, City of: The hydrologic and hydraulic analyses for the FIS dated January 5, 1983, were performed by the Federal Emergency Management Agency (FEMA). That work was completed in March 1982 (Reference 1). Sheboygan, City of: For the original, September 15, 1976 FIS report and March 15, 1977, FIRM, the hydrologic and hydraulic analyses for the Sheboygan River and Lake Michigan were prepared by Owen Ayres and Associates for the Federal Insurance Administration (FIA), under Contract Number H-3600 (Reference 2). For the December 2, 1988, FIS, the hydrologic and hydraulic analyses for Fisherman's Creek were prepared by the Wisconsin Department of Natural Resources (WDNR) (Reference 3). For the April 2, 1991 FIS, the hydrologic and hydraulic analyses for the Sheboygan River were performed by the U.S. Army Corps of Engineers (USACE), Detroit District, for FEMA, under Inter-Agency Agreement No. EMW-87-E-2509, Project Order No. 10. That work was completed in December 1988 (Reference 4). For the November 21, 2002 study, the hydrologic and hydraulic analyses for Lake Michigan were performed by the USACE, Detroit District, for FEMA, under Inter-Agency Agreement No. EMW-93-E-4115, Project Order No. 1. That work was completed in March 1994. Additional revisions to the hydrologic and hydraulic analyses of wave run- up were performed by Dewberry & Davis LLC. That work was completed September 1998 (Reference 5). Planimetric base map files were derived by digitizing the City of Sheboygan, Wisconsin, FIRMs. These files were compiled at a scale of 1:6,000. 2 Sheboygan Falls, City of: For the FIS dated April 2, 1991, the hydrologic and hydraulic analyses for the Sheboygan River were performed by the COE, Detroit District for FEMA, under Inter-Agency Agreement No. EMW-87-E-2509, Project Order No. 10. That work was completed in December 1988 (Reference 6). The hydrologic and hydraulic analyses for the Mullet River were taken from the published Flood Insurance Study for Sheboygan County, Wisconsin (Reference 7). The hydrologic and hydraulic analyses for the Onion River were taken from information developed in preparation of the FIS for Sheboygan County. Cascade, Village of: The hydrologic and hydraulic analyses for the FIS dated April 15, 1981, were performed by Donohue and Associates, Inc., for the FIA, under Contract No. H-4726. That work was completed in November 1979 (Reference 8). Kohler, Village of: The hydro1ogic and hydraulic analyses for the FIS dated April 2, 1991, were performed by the USACE, Detroit District for FEMA, under Inter-Agency Agreement No. EMW-87-E- 2509, Project Order No. 10. That work was completed in December 1988 (Reference 9). Random Lake, Village of: The hydrologic and hydraulic analyses for the FIS dated October 1, 1980, were performed by Donohue & Associates, Inc., for the FIA, under Contract No. H-4726. That work was completed in May 1979 (Reference 10). Sheboygan County For the January 17, 1978 FIS report and July (Unincorporated Areas) 17, 1978 FIRM, the hydrologic and hydraulic analyses were prepared by Owen Ayres and Associates, Inc. for the FIA, under Contract No. H-3805. That work was completed in March 1977 (Reference 11). 3 Sheboygan County For the December 16, 1988, FIS revision, the (Unincorporated Areas) hydrologic and hydraulic analyses were (continued) prepared by the WDNR. FEMA reviewed and accepted that data for purposes of that revision (Reference 7). For the September 3, 1992, FIS revision, the hydrologic and hydraulic analyses were prepared by the USACE, Detroit District, for FEMA under Inter-Agency Agreement No. EMW-87-E-2509, Project Order No. 10. FEMA reviewed and accepted that data for purposes of that revision (Reference 12). For the November 21, 2002, FIS revision, the hydrologic and hydraulic analyses were prepared by the USACEfor FEMA, under Inter-Agency Agreement No. EMW-93-E- 4115, Project Order No. 1. That work was completed in March 1994. Additional revisions to the hydrologic and hydraulic analyses of wave run-up were performed by Dewberry & Davis LLC. That work was completed in September 1998, and revised in accordance with WDNR review comments in February 2000 (Reference 13). For this countywide FIS, redelineation of special flood hazard areas was performed by CDM Federal Programs Corporation, under contract HSFE05-05- D-0027/002.