flood insurance study

601 Pages·2004·5.62 MB·English

by  J. William Brown

The Federal Emergency Management Agency
in Cooperation with
DuPage County, Illinois Presents:

FLOOD INSURANCE
STUDY

A Report of Flood Hazards in:

DUPAGE COUNTY, ILLINOIS
AND INCORPORATED AREAS

Prepared, in parts, by:

FEMA
Region V Nika Engineering
536 South Clark Street 421 Mill Street
Chicago, Illinois 60605 and Batavia, Illiois 60510

March 2007
1 7043CV000A
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.

Part or all of this FIS may be revised and republished at any time. In addition, part of this FIS may be
revised by the Letter of Map Revision process, which does not involve republication or redistribution of
the FIS. It is, therefore, the responsibility of the user to consult with community officials and to check the
community repository to obtain the most current FIS components.

Initial Countywide FIS Effective Date: December 4, 1985
Revised Countywide FIS Date: June 16, 2004
FLOOD INSURANCE STUDY
DuPAGE COUNTY, ILLINOIS

TABLE OF CONTENTS

Page #
1. INTRODUCTION 1
1.1. Purpose of Study 1
1.2. Authority and Acknowledgments 1
1.3. Coordination 5
1.4. Regional Participation and Progress 7
2. AREA STUDIED 8
2.1. Scope of Study 8
2.2. Community Description 8
2.3. Watershed Description 8
2.3.1. DesPlaines River (DP) 9
2.3.1.1. Geographical Description 9
2.3.1.2. Principal Flood Problems 9
2.3.1.3. Flood Protection Measures 11
2.3.2. DuPage River (DU) 13
2.3.2.1. Geographical Description 13
2.3.2.2. Principal Flood Problems 13
2.3.2.3. Flood Protection Measures 13
2.3.3. East Branch DuPage River (EB) 14
2.3.3.1. Geographical Description 14
2.3.3.2. Principal Flood Problems 14
2.3.3.3. Flood Protection Measures 18
2.3.4. Fox River (FR) 21
2.3.4.1. Geographical Description 21
2.3.4.2. Principal Flood Problems 21
2.3.4.3. Flood Protection Measures 22
2.3.5. Salt Creek (SC) 23
2.3.5.1. Geographical Description 23
2.3.5.2. Principal Flood Problems 23
2.3.5.3. Flood Protection Measures 25
2.3.6. Sawmill Creek (SW) 27
2.3.6.1. Geographical Description 27
2.3.6.2. Principal Flood Problems 27
2.3.6.3. Flood Protection Measures 27
2.3.7. West Branch DuPage River (WB) 29
2.3.7.1. Geographical Description 29
2.3.7.2. Principal Flood Problems 29
2.3.7.3. Flood Protection Measures 33
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TABLE OF CONTENTS - continued

3. ENGINEERING METHODS & FLOOD PLAIN
MANAGEMENT APPLICATIONS 36

Note: The following subsections under ENGINEERING METHODS & FLOODPLAIN
MANAGEMENT APPLICATIONS do not have page numbers and are clearly marked
as tabs. Each tributary shall contain the following elements: Tributary Description, Hydrologic
Analysis, Hydraulic Analysis, Flood Boundaries, Floodways and Flood Profiles. As tributaries
are updated and approved, these individual tributary tabs can be quickly replaced without the
additional work of updating the Table of Contents. The tabs contained herein are as follows:
3.1. DesPlaines River (DP)
3.1.1. Main Stem (DPDP)
3.1.2. Addison Creek (DPAC)
3.1.3. Bensenville Ditch (DPBD)
3.1.4. Black Partridge Creek (DPBP)
3.1.5. Crystal Creek (DPCT)
3.1.6. Flagg Creek (DPFC)
3.1.7. Willow Creek (DPWL)
3.2. DuPage River (DU)
3.2.1. Lily Cache (DULC)
3.2.2. Springbrook #2 (DUSG)
3.3. East Branch DuPage River (EB)
3.3.1. Main Stem (EBEB)
3.3.2. Armitage Creek (EBAR)
3.3.3. Army Trail Road Tributary (EBAT)
3.3.4. Crabtree Creek (EBCR)
3.3.5. Tributary #1 (EBE1)
3.3.6. Tributary #2 (EBE2)
3.3.7. Tributary #3 (EBE3)
3.3.8. Tributary #6 (EBE6)
3.3.9. Tributary #7 (EBE7)
3.3.10. Glen Crest Creek (EBGL)
3.3.11. Glen Park (EBGP)
3.3.12. Lacey Creek (EBLA)
3.3.13. Prentiss Creek (EBPR)
3.3.14. Rott Creek (EBRC)
3.3.15. St. Joseph Creek (EBSJ)
3.3.16. Swift Meadows (EBSM)
3.3.17. 22nd Street (EBTS)
3.3.18. Willoway Brook (EBWI)
3.4. Fox River (FR)
3.4.1. Brewster Creek (FRBC)
3.4.2. Indian Creek (FRIC)
3.4.3. Norton Creek (FRNC)
3.4.4. Waubansee Creek (FRWA)

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TABLE OF CONTENTS - continued
3.5. Salt Creek (SC)
3.5.1. Main Stem (SCSC)
3.5.2. Bronswood Creek (SCBW)
3.5.3. Devon Avenue Tributary (SCDA)
3.5.4. Ginger Creek (SCGC)
3.5.5. Oak Brook Tributary (SCOB)
3.5.6. Spring Brook Creek (SCSB)
3.5.7. Sugar Creek (SCSU)
3.5.8. Westwood Creek (SCWC)
3.6. Sawmill Creek (SW)
3.6.1. Sawmill Creek (SWSW)
3.6.2. Wards Creek (SWWD)
3.7. West Branch DuPage River (WB)
3.7.1. Main Stem (WBWB)
3.7.2. Cress Creek (WBCC)
3.7.3. Ferry Creek (WBFE)
3.7.4. South of Foxcroft (WBFX)
3.7.5. Klein Creek (WBKC)
3.7.6. Kress Creek (WBKR)
3.7.7. Spring Brook #1 (WBSP)
3.7.8. Steeple Run Tributary (WBSR)
3.7.9. Tributary #1 (WBW1)
3.7.10. Tributary #2 (WBW2)
3.7.11. Tributary #3 (WBW3)
3.7.12. Tributary #4 (WBW4)
3.7.13. Tributary #5 (WBW5)
3.7.14. Tributary #6 (WBW6)
3.7.15. Tributary #7 (WBW7)
3.7.16. Tributary #8 (WBW8)
3.7.17. Winfield Creek (WBWF)
3.7.18. Winding Creek (WBWG)

4. INSURANCE APPLICATION 41
4.1. Reach Determinations 41
4.2. Flood Hazard Factors 41
4.3. Flood Insurance Zones 41
4.4. Flood Insurance Rate Map Description 43
5. OTHER STUDIES 44
6. LOCATION OF DATA 46
7. REFERENCES AND BIBLIOGRAPHY 47

FIGURES

Figure 1 - Floodway Schematic 40

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TABLE OF CONTENTS - continued

TABLES

Table 1 - Tributary Study Acknowledgements 2

Table 2 - Initial and Final CCO Meetings 5

Table 3 - Flagg Creek Recorded Flood Discharges 10

Table 4 - East Branch DuPage River Flood Stages at Army Trail Road 14

Table 5 - East Branch DuPage River August 1972 Recorded Flood Crests 15

Table 6 - Prentiss Creek Flood of Record Recorded Flood Crests at Route 53 17

Table 7 - Spring Brook Salt Creek Flood Stages 24

Table 8 - USGS Recorder Gage of Salt Creek at Western Springs 25

Table 9 - Winfield Creek Gage Readings for 1972 Flood Event 32

EXHIBITS (as can be found in each corresponding tributary TAB in section 3.0)

Exhibit 1 - Flood Profiles
Addison Creek (DPAC) Panel 01P
Addison Creek Tributary No. 1 (DPAC) Panel 02P
Addison Creek Tributary No. 2 (DPAC) Panel 03P
Addison Creek Tributary No. 3 (DPAC) Panels 04P-05P
Armitage Ditch (EBAR) Panels 30P-31P
Armitage Fork (EBAR) Panel 32P
Bensenville Ditch (Silver Creek) (DPBP) Panels 06P-07P
Brewster Creek (FRBC) Panels 85P-86P
Briarwood Ditch (SCGC) Panel 98P
Bronswood Tributary (SCBW) Panels 91P-93P
Crabtree Creek (EBCR) Panels 33P-35P
Cress Creek (WBCC) Panel 150P
Des Plaines River (DPDP) Panels 08P-09P
Devon Avenue Tributary (SCDA) Panel 94P
East Branch DuPage River (EBEB) Panels 36P-43P
East Branch Sawmill Creek (SWSW) Panels 144P-145P
East Branch Tributary No. 1 (EBE1) Panels 44P-45P
East Branch Tributary No. 2 (EBE2) Panel 46P
East Branch Tributary No. 3 (EBEB) Panels 47P-48P
East Branch Tributary No. 4 (EBGL) Panels 49P-50P

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TABLE OF CONTENTS - continued
East Branch Tributary No. 5 (EBWI) Panels 51P-53P
St. Procopius Creek (EBE6) Panels 54P-55P
East Branch Tributary No. 7 (EBE7) Panels 56P-57P
Ferry Creek (WBFE) Panels 151P-154P
Ferry Creek Tributary No. 1 (WBFE) Panels 155P-157P
Flagg Creek (DPFC) Panel 21P
Ginger Creek (SCGC) Panels 95P-97P
Heritage Oaks Tributary (SCGC) Panel 99P
Klein Creek Tributary No. 1 (WBKC) Panels 167P-168P
Klein Creek Tributary No. 2 (WBKC) Panel 169P
Klein Creek Tributary No. 3 (WBKC) Panel 170P
Klein Creek (WBKC) Panels 161P-166P
Kress Creek (WBKR) Panels 171P-177P
Lacey Creek (EBLA) Panels 58P-60P
Lombard Tributary (SCGC) Panel 100P
Mays Lake Tributary (SCGC) Panels 101P-102P
Meacham Creek (SCSB) Panels 114P-115P
Midwest Club Tributary (SCGC) Panel 103P
North Branch St. Joseph Creek (EBSJ) Panel 80P
Norton Creek (FRNC) Panel 87P
Norton Creek Tributary (FRNC) Panel 88P
North Unnamed Creek (DPWL) Panel 24P
Plainfield Road Ditch (DPFC) Panels 17P-18P
Prentiss Creek (EBPR) Panels 61P-64P
Rott Creek (EBRC) Panels 65P-68P
Salt Creek (SCSC) Panels 116P-130P
Sawmill Creek (SWSW) Panels 136P-140P
Sawmill Creek Tributary No. 1 (SWSW) Panels 148P-149P
Sawmill Creek Tributary No. 3 (DPDP) Panels 10P-15P
South Branch St. Joseph Creek (EBSJ) Panels 81P-82P
South Fork Westwood Creek (SCWC) Panel 135P
South Unnamed Creek (DPWL) Panel 23P
Spring Brook Creek (SCSB) Panels 106P-112P
Spring Brook No. 1 (WBSP) Panels 180P-184P
Spring Brook No. 2 (DUSG) Panels 25P-29P
Spring Road Tributary (SCOB) Panels 104P-105P
St. Joseph Creek (EBSJ) Panels 69P-75P
St. Joseph Creek Tributary (EBSJ) Panel 83P
Sugar Creek (SCSU) Panels 131P-132P
Sugar Creek Tributary A (SCSU) Panel 133P
Tributary 1(A) (EBSJ) Panels 76P-78P
Tributary 2(B) (EBSJ) Panel 79P
Unnamed Creek (South of Foxcroft Road) (WBFX) Panels 158P-159P
Unnamed Stream (North of 22nd Street) (EBTS) Panel 84P
Unnamed Creek (South of 87th Street) (WBFX) Panel 160P

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TABLE OF CONTENTS - continued
Unnamed Tributary to Kress Creek (WBKR) Panels 178P-179P
WardsC reek (SWWD) Panel 146P-147P
Waubansee Creek (FRWA) Panels 89P-90P
West Branch DuPage River (WBWB) Panels 185P-196P
West Branch Sawmill Creek (SWSW) Panels 141P-143P
West Branch Tributary No. 1 (WBW1) Panels 197P-198P
West Branch Tributary No. 2 (Country Creek) (WBW2) Panels 199P-200P
West Branch Tributary No. 3 (WBW3) Panels 201P-202P
West Branch Tributary No. 4 (WBW4) Panels 203P-204P
West Branch Tributary No. 5 (WBW5) Panel 205P
West Branch Tributary No. 6 (WBW6) Panels 206P-208P
West Branch Tributary No. 7 (WBW7) Panels 209P-211P
West Branch Tributary to Spring Brook Creek (SCSB) Panel 113P
Westwood Creek (SCWC) Panel 134P
Winfield Creek (WBWF) Panels 212P-217P
Winding Creek (WBWG) Panels 218P-219P
59th Street Ditch (DPFC) Panel 22P
63rd Street Ditch (DPFC) Panels 19P-20P
79th Street Ditch (DPFC) Panel 16P

Exhibit 2 - Flood Insurance Rate Map Index
Flood Insurance Rate Map

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1.0 INTRODUCTION

1.1 Purpose of Study

This countywide Flood Insurance Study (FIS) investigates the existence and
severity of flood hazards in, or revises and updates previous FISs/Flood
Insurance Rate Maps (FIRMs) for the geographic area of DuPage County,
Illinois, including: the Villages of Addison, Bartlett, Bensenville,
Bloomingdale, Carol Stream, Clarendon Hills, Downer’s Grove, Glen
Ellyn, Glendale Heights, Hinsdale, Itasca, Lisle, Lombard, Oakbrook
Terrace, Roselle, Villa Park, Warrenville, Wayne, Westmont, Wheaton,
Willowbrook, Winfield, Wood Dale and Woodridge; the Cities of Aurora,
Darien, Elmhurst, Naperville, Oak Brook, and West Chicago, and the
unincorporated areas of DuPage County (hereinafter referred to collectively
as DuPage County).

The FIS and FIRMs for DuPage County will also show the portion of the
Villages of Bolingbrook, Burr Ridge, Elk Grove, Hanover Park,
Schaumburg, and Wayne; the Cities of Chicago and St. Charles that lie
within DuPage County. The remaining portions of these communities lie
within other counties; these communities have, therefore, been shown on
DuPage County FIRMs for informational purposes only. The information
contained on the DuPage County FIS for these communities is not to be
used for flood insurance purposes.

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 DuPage County to update existing floodplain regulations as part of the
Regular Phase of the National Flood Insurance Program (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, it shall be understood that
the state (or other jurisdictional agency) shall be able to explain these
requirements and criteria.

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.

For each tributary in DuPage County, Table 1: “Tributary Study
Acknowledgements” lists the organizations and companies responsible for
the development of the hydrologic and hydraulic analysis. For those
organizations and companies contracted by FEMA to perform such
1
analysis, a contract number and corresponding project order number were
included. The listed finish date is the original date of study completion and
does not reflect updates as a result of Letters of Map Revision (LOMR).
Further Hydrologic and Hydraulic information for each tributary can be
located in Section 3.0.

Table 1: Tributary Study Acknowledgements
Hydrologic and Hydraulic Study
Watershed Tributary Analysis Performed By: FEMA Contract Numbers Completion
Des Plaines
Donohue and Associates, Inc. study
Addison Creek Stormwater
Addison Creek Sep-88
Management System Evaluation,
DuPage and Cook Counties, Illinois

Illlinois Department of
Transportation study Strategic
Bensenville Ditch Dec-87
Planning Study for Flood Control -
Bensenville Ditch

Black Partridge Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Apr-79
Creek of Engineers 76, P.O. No. 19
Flagg Creek Harza Engineering Company Contract No. H-4562 and H-3978 Aug-78
Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Willow Creek Apr-79
of Engineers 76, P.O. No. 19
Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Main Stem Apr-79
of Engineers 76, P.O. No. 19
DuPage
River Lily Cache Harza Engineering Company Contract No. H-3978 Feb-79
Inter-Agency Agreement Nos. IAA-H-16-
Chicago District, U.S. Army Corps
Spring Brook #2 75, P.O. No. 21 and IAA-H-7-76, P.O. Feb-78
of Engineers
No. 1
East Branch Inter-Agency Agreement No. IAA-H-16-
Chicago District, U.S. Army Corps
DuPage Armitage Creek 75, P.O. No 19, and Inter-Agency Nov-76
of Engineers
River Agreement No. IAA-H-7-76, P.O. No. 1
Army Trail Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Apr-79
Tributary of Engineers 76, P.O. No. 19
Inter-Agency Agreement No. IAA-H-16-
Chicago District, U.S. Army Corps
Crabtree Creek 75 P.O. No. 21 and Inter-Agency Jan-77
of Engineers
Agreement No. IAA-H-7-76, P.O. No. 1
Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Tributary #1 Apr-79
of Engineers 76, P.O. No. 19
Camp Dresser and McKee: DEC
Tributary #2 Floodplain Mapping Report for East Apr-02
Branch DuPage River Tributary #2
Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Tributary #3 Apr-79
of Engineers 76, P.O. No. 19
Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Tributary #6 Apr-79
of Engineers 76, P.O. No. 19
Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Tributary #7 Apr-79
of Engineers 76, P.O. No. 19
Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Glen Crest Creek Apr-79
of Engineers 76, P.O. No. 19
Chicago District, U.S. Army Corps Inter-Agency Agreement No. IAA-H-7-
Glen Park Apr-79
of Engineers 76, P.O. No. 19
2