DANE COUNTY, WISCONSIN and INCORPORATED AREAS Volume 1 of 2
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DANE COUNTY, WISCONSIN AND INCORPORATED AREAS Volume 1 of 2 Community Community Community Community Name Number Name Number BELLEVILLE, VILLAGE OF 550159 MAPLE BLUFF, VILLAGE OF 550618 BLACK EARTH, VILLAGE OF 550079 MARSHALL, VILLAGE OF 550084 *BLUE MOUNDS, VILLAGE OF 550620 MAZOMANIE, VILLAGE OF 550085 BROOKLYN, VILLAGE OF 550621 McFARLAND, VILLAGE OF 550086 CAMBRIDGE, VILLAGE OF 550080 MIDDLETON, CITY OF 550087 COTTAGE GROVE, VILLAGE OF 550617 MONONA, CITY OF 550088 CROSS PLAINS, VILLAGE OF 550081 MOUNT HOREB, VILLAGE OF 550624 DANE COUNTY (UNINCORPORATED AREAS) 550077 OREGON, VILLAGE OF 550089 *DANE, VILLAGE OF 550622 ROCKDALE, VILLAGE OF 550090 DEERFIELD, VILLAGE OF 550623 SHOREWOOD HILLS, VILLAGE OF 550556 DeFOREST, VILLAGE OF 550082 STOUGHTON, CITY OF 550091 EDGERTON, CITY OF 550365 SUN PRAIRIE, CITY OF 550573 FITCHBURG, CITY OF 550610 VERONA, CITY OF 550092 MADISON, CITY OF 550083 WAUNAKEE, VILLAGE OF 550093 * NO SPECIAL FLOOD HAZARD AREAS IDENTIFIED WITHIN COMMUNITY REVISED: January 2, 2009 Federal Emergency Management Agency FLOOD INSURANCE STUDY NUMBER 55025CV001B 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) report may not contain all data available within the Community Map Repository. Please contact the Community Map Repository for any additional data. The Federal Emergency Management Agency (FEMA) may revise and republish part or all of this FIS report at any time. In addition, FEMA may revise part of this FIS report by the Letter of Map Revision process, which does not involve republication or redistribution of the FIS report. Therefore, users should consult with community officials and check the Community Map Repository to obtain the most current FIS report components. Effective Date: 06/17/03 Revised Dates: 01/02/09 TABLE OF CONTENTS VOLUME 1 1.0 INTRODUCTION ...............................................................................................................1 1.1 Purpose of Study............................................................................................................1 1.2 Authority and Acknowledgments ..................................................................................1 1.3 Coordination ..................................................................................................................6 2.0 AREA STUDIED .................................................................................................................8 2.1 Scope of Study...............................................................................................................8 2.2 Community Description.................................................................................................10 2.3 Principal Flood Problems...............................................................................................10 2.4 Flood Protection Measures ............................................................................................14 3.0 ENGINEERING METHODS .............................................................................................14 3.1 Hydrologic Analyses......................................................................................................15 3.2 Hydraulic Analyses........................................................................................................25 3.3 Vertical Datum...............................................................................................................33 4.0 FLOODPLAIN MANAGEMENT APPLICATIONS ......................................................34 4.1 Floodplain Boundaries...................................................................................................34 4.2 Floodways......................................................................................................................35 5.0 INSURANCE APPLICATIONS ........................................................................................91 6.0 FLOOD INSURANCE RATE MAP ..................................................................................91 7.0 OTHER STUDIES...............................................................................................................92 8.0 LOCATION OF DATA.......................................................................................................92 9.0 BIBLIOGRAPHY AND REFERENCES ..........................................................................96 i TABLE OF CONTENTS (Continued) FIGURES Figure 1 – Floodway Schematic ....................................................................................................... 37 TABLES Table 1 – CCO Meeting Dates............................................................................................................ 7 Table 2 – Flooding Sources Studies By Detailed Methods ................................................................ 8 Table 3 – Letters of Map Change ....................................................................................................... 9 Table 4 – Summary of Discharges.................................................................................................... 20 Table 5 – Summary of Stillwater Elevations .................................................................................... 24 Table 6 – Floodway Data.................................................................................................................. 38 Table 7 – Community Map History.................................................................................................. 93 VOLUME 2 EXHIBITS Exhibit 1 - Flood Profiles Badger Mill Creek 01P – 03P Badger Mill Creek Diversion Channel 04P Black Earth Creek 05P – 10P Black Earth Creek Secondary Channel 11P Brewery Creek 12P Dorn Creek 13P – 16P Dry Tributary to Badger Mill Creek 17P – 19P East Branch Badger Mill Creek 20P East Branch Starkweather Creek 21P – 22P Enchanted Valley Creek 23P – 25P Greenway 26P Koshkonong Creek 27P – 36P Maunesha River 37P – 38P Milwaukee Street Tributary 39P Nine Springs Creek 40P – 41P Oregon Branch Badfish Creek 42P – 43P Pennito Creek 44P – 45P Pheasant Branch 46P – 49P Portage Road Tributary 50P – 51P Sixmile Creek 52P – 56P South Fork to Pheasant Branch 57P Starkweather Creek 58P Sugar River 59P – 63P Token Creek 64P Unnamed Tributary to Lake Waubesa 65P – 67P Vermont Creek 68P West Branch Starkweather Creek 69P – 72P Wisconsin River 73P – 75P Yahara River 76P – 97P Exhibit 2 - Flood Insurance Rate Map Index Flood Insurance Rate Map ii FLOOD INSURANCE STUDY DANE COUNTY, WISCONSIN AND INCORPORATED AREAS 1.0 INTRODUCTION 1.1 Purpose of Study This Flood Insurance Study (FIS) revises and updates information on the existence and severity of flood hazards in the geographic area of Dane County, Wisconsin, including the Cities of Edgerton, Fitchburg, Madison, Middleton, Monona, Stoughton, Sun Prairie, and Verona; the Villages of Belleville, Black Earth, Brooklyn, Cambridge, Cottage Grove, Cross Plains, Deerfield, Deforest, Marshall, Mazomanie, McFarland, Mount Horeb, Oregon, Rockdale, Shorewood Hills and Waunakee; and the unincorporated areas of Dane County (referred to collectively herein as Dane County). The following communities are non-floodprone: the Villages of Blue Mounds and Dane. The City of Edgerton and Villages of Belleville, Brooklyn, and Cambridge are located in more than one county. Only the portions of these communities within Dane County are shown. This FIS aids in the administration of the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. This study has developed flood-risk data for various areas of the community that will be used to establish actuarial flood insurance rates. This information will be used by Dane County to update existing floodplain regulations as part of the Regular Phase of the National Flood Insurance Program (NFIP). The information 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 acknowledgments for each jurisdiction included in this countywide FIS, as compiled from their previously printed FIS reports, is shown on the following pages. 1 Belleville, Village of: The hydrologic and hydraulic analyses for the FIS report dated September 18, 1986, were prepared by the U.S. Geological Survey (USGS) for the Federal Insurance Administration (FIA) under Inter-Agency Agreement No. IAA-H-14-78, Project Order No. 3. That work was completed in November 1978. In a 1986 revision to this study, the hydrologic and hydraulic analyses for Sugar River were performed by the State of Wisconsin, Department of Natural Resources (DNR). FEMA reviewed and accepted these data for purposes of this revision. Black Earth, Village of: The hydrologic and hydraulic analyses