BEAVER COUNTY, PENNSYLVANIA

Transcription

1 VOLUME 3 OF 3 BEAVER COUNTY, PENNSYLVANIA (ALL JURISDICTIONS) Beaver County COMMUNITY NAME COMMUNITY NUMBER COMMUNITY NAME COMMUNITY NUMBER ALIQUIPPA, CITY OF AMBRIDGE, BOROUGH OF BADEN, BOROUGH OF BEAVER, BOROUGH OF BEAVER FALLS, CITY OF BIG BEAVER, BOROUGH OF BRIDGEWATER, BOROUGH OF BRIGHTON, TOWNSHIP OF CENTER, TOWNSHIP OF CHIPPEWA, TOWNSHIP OF CONWAY, BOROUGH OF DARLINGTON, BOROUGH OF DARLINGTON, TOWNSHIP OF DAUGHERTY, TOWNSHIP OF EAST ROCHESTER, BOROUGH OF EASTVALE, BOROUGH OF ECONOMY, BOROUGH OF FALLSTON, BOROUGH OF *FRANKFORT SPRINGS, BOROUGH OF FRANKLIN, TOWNSHIP OF FREEDOM, BOROUGH OF GEORGETOWN, BOROUGH OF GLASGOW, BOROUGH OF GREENE, TOWNSHIP OF HANOVER, TOWNSHIP OF HARMONY, TOWNSHIP OF *No Special Flood Hazard Areas Identified HOMEWOOD, BOROUGH OF HOOKSTOWN, BOROUGH OF HOPEWELL, TOWNSHIP OF INDEPENDENCE, TOWNSHIP OF INDUSTRY, BOROUGH OF KOPPEL, BOROUGH OF MARION, TOWNSHIP OF MIDLAND, BOROUGH OF MONACA, BOROUGH OF NEW BRIGHTON, BOROUGH OF NEW GALILEE, BOROUGH OF NEW SEWICKLEY, TOWNSHIP OF NORTH SEWICKLEY, TOWNSHIP OF OHIOVILLE, BOROUGH OF PATTERSON, TOWNSHIP OF PATTERSON HEIGHTS, BOROUGH OF POTTER, TOWNSHIP OF PULASKI, TOWNSHIP OF RACCOON, TOWNSHIP OF ROCHESTER, BOROUGH OF ROCHESTER, TOWNSHIP OF SHIPPINGPORT, BOROUGH OF SOUTH BEAVER, TOWNSHIP OF SOUTH HEIGHTS, BOROUGH OF VANPORT, TOWNSHIP OF WEST MAYFIELD, BOROUGH OF WHITE, TOWNSHIP OF Effective: August 17, 2015 FLOOD INSURANCE STUDY NUMBER 42007CV003A

2 NOTICE TO FLOOD INSURANCE STUDY USERS Communities participating in the National Flood Insurance Program (NFIP) 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. It is advisable to 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 (LOMR) 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 Map Repository to obtain the most current FIS report components. Selected Flood Insurance Rate Map (FIRM) panels for this community contain information that was previously shown separately on the corresponding Flood Boundary and Floodway Map (FBFM) panels (e.g., floodways, cross sections). In addition, former flood hazard zone designations have been changed as follows: Old Zone(s) Al through A30 B C New Zone AE X X Initial Countywide FIS Effective Date: August 17, 2015

3 TABLE OF CONTENTS Table of Content Volume INTRODUCTION Purpose of Study Authority and Acknowledgments Coordination AREA STUDIED Scope of Study Community Description Principal Flood Problems Flood Protection Measures ENGINEERING METHODS Hydrologic Analyses Hydraulic Analyses Vertical Datum FLOODPLAIN MANAGEMENT APPLICATIONS Floodplain Boundaries Floodways INSURANCE APPLICATIONS FLOOD INSURANCE RATE MAP OTHER STUDIES LOCATION OF DATA BIBLIOGRAPHY AND REFERENCES. 96 FIGURES Figure 1 Floodway Schematic i

4 Table of Content Volume 1 (continued) TABLES Table 1 Initial and Final CCO Meetings... 6 Table 2 Areas Studied by Detailed Methods... 9 Table 3 Stream Name Changes Table 4 Major Floods on the Beaver River at the City of Beaver Falls Table 5 Major Floods on Connoquenessing Creek at Hazen Road Bridge Table 6 Flood of Record at Dashield Lock and Dam Upper Gage Ohio River Mile Table 7 Highest Floods at Montgomery Locks & Dam Upper Gage Ohio River Mile Table 8 Floods of Record on the Ohio River at Sewickley, Pennsylvania Table 9 Record Floods on Raccoon Creek at Moffats Mills Table 10 Flood Control Dams and Reservoirs Affecting Beaver County Table 11 Summary of Discharges Table 12 Manning s n Values Table 13 Vertical Datum Conversion Table 14 Floodway Data Table 15 Community Map History Table of Content Volume 2 Exhibit 1 Flood Profiles EXHIBITS Beaver River Big Sewickley Creek Big Sewickley Creek Tributary 1 Big Sewickley Creek Tributary 2 Blockhouse Run Blockhouse Run Tributary 1 Blockhouse Run Tributary 2 Brady Run Brush Creek Connoquenessing Creek Connoquenessing Creek Bypass Dutchman Run Elkhorn Run Elkhorn Run Tributary 1 Lacock Run Legionville Run Logtown Run Logtown Run Tributary 1 North Branch Moon Run North Fork Big Sewickley Creek North Fork Big Sewickley Creek Tributary 1 North Fork Little Beaver Creek Panels 01P-11P Panels 12P-17P Panels 18P-20P Panel 21P Panels 22P-24P Panels 25P-28P Panels 29P-31P Panels 32P-33P Panels 34P-40P Panels 41P-51P Panels 52P-53P Panels 54P-55P Panels 56P-59P Panel 60P Panels 61P-64P Panel 65P Panels 66P-68P Panel 69P Panels 70P-71P Panels 72P-74P Panels 75P-76P Panels 77P-79P ii

5 Table of Content Volume 3 Exhibit 1 Flood Profiles (continued) Ohio River Raccoon Creek Shafers Run Shafers Run Tributary 1 Shafers Run Tributary 2 South Branch Legionville Run South Branch Legionville Run Tributary 1 South Branch Moon Run South Branch Moon Run Tributary 1 Stockman Run Trampmill Run Tributary to Walnut Bottom Run Two Mile Run Wallace Run Wallace Run Tributary 2 Walnut Bottom Run West Clarks Run Panels 80P- 99P Panels 100P-105P Panel 106P Panels 107P-108P Panel 109P Panels 110P-111P Panel 112P Panels 113P-114P Panel 115P Panels 116P-120P Panel 121P Panel 122P Panels 123P-124P Panels 125P-130P Panels 131P-132P Panels 133P-136P Panels 137P-139P Exhibit 2 Flood Insurance Rate Map Index Flood Insurance Rate Map iii

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