e

VOLUME 3 OF 6

FAIRFIELD COUNTY, CONNECTICUT (ALL JURISDICTIONS)

COMMUNITY NAME COMMUNITY NUMBER BETHEL, TOWN OF 090001 BRIDGEPORT, CITY OF 090002 BROOKFIELD, TOWN OF 090003 DANBURY, CITY OF 090004 DARIEN, TOWN OF 090005 EASTON, TOWN OF 090006 FAIRFIELD, TOWN OF 090007 GREENWICH, TOWN OF 090008 Fairfield County MONROE, TOWN OF 090009 NEW CANAAN, TOWN OF 090010 NEW FAIRFIELD, TOWN OF 090188 NEWTOWN, TOWN OF 090011 NORWALK, CITY OF 090012 REDDING, TOWN OF 090141 RIDGEFIELD, TOWN OF 090013 SHELTON, CITY OF 090014 SHERMAN, TOWN OF 090166 STAMFORD, CITY OF 090015 STRATFORD, TOWN OF 090016 TRUMBULL, TOWN OF 090017 WESTON, TOWN OF 090018 WESTPORT, TOWN OF 090019 WILTON, TOWN OF 090020

Revised: October 16, 2013

Federal Emergency Management Agency

FLOOD INSURANCE STUDY NUMBER 09001CV003C

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 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 report may be revised by the Letter of Map Revision process, which does not involve republication or redistribution of the FIS report. 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 report components.

Initial Countywide FIS Effective Date: June 18, 2010

Revised Countywide FIS Dates: July 8, 2013 October 16, 2013

TABLE OF CONTENTS – Volume 1

Page

1.0 INTRODUCTION 1

1.1 Purpose of Study 1

1.2 Authority and Acknowledgments 1

1.3 Coordination 9

2.0 AREA STUDIED 11

2.1 Scope of Study 11

2.2 Community Description 16

2.3 Principal Flood Problems 16

2.4 Flood Protection Measures 23

3.0 ENGINEERING METHODS 30

3.1 Riverine Hydrologic Analyses 30

3.2 Riverine Hydraulic Analyses 79

3.3 Coastal Hydrologic Analyses 94

3.4 Coastal Hydraulic Analyses 95

4.0 FLOODPLAIN MANAGEMENT APPLICATIONS 111

4.1 Floodplain Boundaries 112

4.2 Floodways 113

5.0 INSURANCE APPLICATIONS 116

6.0 FLOOD INSURANCE RATE MAP 117

7.0 OTHER STUDIES 121

8.0 LOCATION OF DATA 121

9.0 BIBLIOGRAPHY AND REFERENCES 121

i

TABLE OF CONTENTS – Continued – Volume 1

Page

FIGURES

Figure 1 – Frequency-Discharge, Drainage Area Curves – Aspetuck River (Lower Reach) – Saugatuck River (Lower Reach) – Saugatuck River (Upper Reach) ...... 43 Figure 2 – Frequency-Discharge, Drainage Area Curves – Beaver Brook ...... 44 Figure 3 – Frequency-Discharge, Drainage Area Curves – Jenning’s Brook ...... 45 Figure 4 – Frequency-Discharge, Drainage Area Curves – Kettle Creek ...... 46 Figure 5 – Frequency-Discharge, Drainage Area Curves – Kohanza Brook ...... 47 Figure 6 – Frequency-Discharge, Drainage Area Curves – Limekiln Brook...... 48 Figure 7 – Frequency-Discharge, Drainage Area Curves – Padanarum Brook ...... 49 Figure 8 – Frequency-Discharge, Drainage Area Curves – Still River ...... 50 Figure 9 – Frequency-Discharge, Drainage Area Curves – Symbaug Brook ...... 51 Figure 10 – Transect Schematic ...... 98 Figure 11 – Transect Location Map ...... 106 Figure 12 – Floodway Schematic ...... 116

TABLES

Table 1 – Initial and Final CCO Meetings ...... 10 Table 2 – Flooding Sources Studied by Detailed Methods ...... 11 Table 3 – Stream Name Changes ...... 13 Table 4 – Letters of Map Change ...... 14 Table 5 – Summary of Discharges ...... 52 Table 6 – Summary of Stillwater Elevations ...... 78 Table 7 – Manning’s “n” Values...... 89 Table 8 – Summary of Coastal Stillwater Elevations ...... 94 Table 9 – Transect Descriptions ...... 99 Table 10 – Transect Data ...... 107 Table 11 – Floodway Data ...... See Vol. 2 Table 12 – Community Map History ...... 118

TABLE OF CONTENTS – Volume 2 – October 16, 2013

Table 11 – Floodway Data ...... 1-125

ii

TABLE OF CONTENTS – Continued – Volume 3

EXHIBITS

Exhibit 1 - Flood Profiles Aspetuck River (Lower Reach) Panels 001P-005P Aspetuck River (Upper Reach) Panels 006P-020P Ball Pond Brook Panels 021P-027P Ballwall Brook Panel 028P Beardsley Brook Panel 029P Beaver Brook Panels 030P-038P Belden Brook Panels 039P-045P Betts Pond Brook Panels 046P-047P Blind Brook Panels 048P-049P Booth Hill Brook Panel 050P Brown’s Brook Panels 051P-053P Bruce Brook Panels 054P-061P Burying Ground Brook Panels 062P-064P Byram River Panels 065P-069P Cider Mill Brook Panels 070P-071P Comstock Brook Panels 072P-079P Converse Pond Brook Panels 080P-083P Cooper Pond Brook Panels 084P-090P Copper Mill Brook Panel 091P Cricker Brook Panel 092P Dead Man’s Brook Panels 093P-096P Deep Brook Panels 097P-100P Dibbles Brook Panel 101P East Branch Byram River Panel 102P East Branch Mianus River Panels 103P-106P East Branch Silvermine River Panels 107P-109P East Brook Panels 110P-119P East Brothers Brook Panel 120P East Swamp Brook Panels 121P-122P

TABLE OF CONTENTS – Volume 4 – October 16, 2013

EXHIBITS – Continued

Exhibit 1 - Flood Profiles - continued Farmill River Panels 123P-133P Ferry Creek/Long Brook Panels 134P-135P Five Mile River Panels 136P-145P Goodwives River Panels 146P-149P Grasmere Brook Panels 150P-154P Halfway River Panels 155P-157P Harvey Pete Brook Panel 158P

iii

TABLE OF CONTENTS – Continued – Volume 4

EXHIBITS – Continued

Exhibit 1 - Flood Profiles - continued Hawley Pond Brook Panel 159P Horse Tavern Brook Panels 160P-164P Horseneck Brook Panels 165P-171P Housatonic River (Lower Reach) Panels 172P-174P Housatonic River (Middle Reach) Panels 175P-176P Housatonic River (Upper Reach) Panels 177P-178P Island Brook Panels 179P-189P Jenning’s Brook Panels 190P-192P Keelers Brook Panel 193P Kettle Creek Panels 194P-199P Kohanza Brook Panel 200P Laurel Brook Panel 201P Lewis Brook Panels 202P-207P Limekiln Brook 1 Panels 208P-211P Limekiln Brook 2 Panels 212P-217P Londons Brook Panels 218P-219P Londons Brook Divided Flow Panel 220P Means Brook Panels 221P-225P Mianus River Panels 226P-232P Mill River Panels 233P-242P Miry Brook Panels 243P-246P Morehouse Brook Panels 247P-249P Muddy Brook Panels 250P-252P

TABLE OF CONTENTS – Volume 5 – October 16, 2013

EXHIBITS – Continued

Exhibit 1 - Flood Profiles - continued Noroton River Panels 253P-261P North Farrar Brook Panels 262P-266P Norwalk River Panels 267P-282P Padanaram Brook Panels 283P-285P Parting Brook Panels 286P-287P Pequonnock River (Lower Reach) Panels 288P-293P Pequonnock River (Upper Reach) Panels 294P-299P Pond Brook Panels 300P-301P Pootatuck River Panels 302P-311P Poplar Plains Brook Panel 312P Pumpkin Ground Brook Panels 313P-315P Putnam Park Brook Panel 316P Ridgefield Brook Panels 317P-320P Rippowam River (Lower Reach) Panels 321P-327P

iv

TABLE OF CONTENTS – Continued – Volume 5

EXHIBITS – Continued

Exhibit 1 - Flood Profiles - continued Rippowam River (Upper Reach) Panels 328P-331P Rockwood Lake Brook Panels 332P-335P Rooster River Panels 336P-339P Sasco Creek Panels 340P-344P Saugatuck River (Lower Reach) Panels 345P-348P Saugatuck River (Upper Reach) Panels 349P-353P Silvermine River Panels 354P-359P Smith Pond Brook Panels 360P-362P South Branch of Unnamed Tributary to Saugatuck River Panels 363P-364P Split Flow from Lake Windwing Panel 365P Springdale Brook Panels 366P-369P Still River Panels 370P-382P

TABLE OF CONTENTS – Volume 6 – October 16, 2013

EXHIBITS – Continued

Exhibit 1 - Flood Profiles - continued Stony Brook 1 Panels 383P-385P Stony Brook 2 Panels 386P-388P Strickland Brook Panels 389P-392P Sympaug Brook Panels 393P-395P Tanners Brook Panel 396P Tenmile River Panel 397P Terehaute Brook Panels 398P-399P Titicus River Panels 400P-404P Toilsome Brook Panels 405P-410P Tokeneke Brook Panels 411P-413P Tributary A to Horse Tavern Brook Panels 414P-417P Tributary B to Canoe Brook Lake Panels 418P-421P Tributary C to Tributary B to Canoe Brook Lake Panels 422P-423P Tributary D to Easton Reservoir Panels 424P-431P Tributary E to Pequonnock River Panel 432P Tributary F to Pequonnock River Panels 433P-439P Tributary G to Pequonnock River Panels 440P-446P Tributary H to Tributary G to Pequonnock River Panels 447P-449P Tributary I to Pequonnock River Panels 450P-451P Tributary J to Pequonnock River Panels 452P-455P Tributary K at State Route 8 Panels 456P-457P Tributary L at Huntington Road Panel 458P Tributary M to Pinewood Lake Panels 459P-461P

v

TABLE OF CONTENTS – Continued – Volume 6

EXHIBITS – Continued

Exhibit 1 - Flood Profiles - continued Tributary N to Pinewood Lake Panels 462P-463P Tributary O at Intervale Road Panels 464P-465P Unnamed Tributary to Saugatuck River Panels 466P-470P West Branch Pequonnock River Panels 471P-475P West Branch Saugatuck River Panel 476P-493P West Brothers Brook Panels 494P-496P Willow Brook Panel 497P Wolf Pit Brook Panels 498P-500P Yellow Mill Channel Panels 501P-503P

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

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