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Lewis County 2007 Flood Disaster Recovery Strategy

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Lewis County 2007 Flood Disaster Recovery Strategy Lewis County 2007 Flood Disaster Recovery Strategy April 2009 Table of Contents Executive Summary.......................................................................................................................................1 Section I: Introduction ...................................................................................................................................6 Chapter 1: Report Purpose & Overview..................................................................................................7 Section II: Impact of the December 2007 Lewis County Flood ....................................................................11 Chapter 2: River Basin Storm Event &Hydrology Information..............................................................12 Chapter 3: Damage Estimates..................................................................................................................18 Section III: Economic Recovery Strategy......................................................................................................37 Chapter 4: Economic Recovery Strategy.................................................................................................39 Section IV: Economic Recovery Projects .....................................................................................................44 Chapter 5: Funding Strategies & Responsibilities...................................................................................45 Chapter 6: Project Funding Strategy........................................................................................................57 Appendix 1: Maps..........................................................................................................................................66 Appendix 2: Change in Lewis County Property Taxes from 2007 Flood Event...........................................80 Appendix 3: Delay Cost Estimates Based on WA State DOT Methodology................................................83 Appendix 4: Landslide Reconnaissance ........................................................................................................85 Appendix 5: Possible Flood control Measures for Lewis County .................................................................87 Appendix 6: Chehalis Renaissance Implementation Projects........................................................................90 Appendix 7: Action Plan Project Descriptions ..............................................................................................94 Tables 1.1 Flood Damages for Historic Floods.........................................................................................................10 2.1 Peak Discharge & Stage Data..................................................................................................................15 3.1 Damage Assessment ................................................................................................................................18 3.2 Total Damages .........................................................................................................................................19 3.3 Preliminary Costs to Restore Fire Districts .............................................................................................19 3.4 Federal Funds Allocated ..........................................................................................................................20 3.5 Number of Businesses/Working Capital & Home Loans........................................................................21 3.6 Total Dollar Amount Businesses/Working Capital & home Loans.........................................................21 3.7 Total Federal Funds by Lewis County & Jurisdictions ...........................................................................22 3.8 Amount of Flood Acreage in Urban Growth Area ..................................................................................24 3.9 Flooded Acreage within Rural Lewis County .........................................................................................24 3.10 Flooded Acreage within Growth Management Area.............................................................................25 3.11 Flooded Acreage within Rural Lewis County by Zoning .....................................................................26 3.12 Number & Types of Structures in Flooded Areas .................................................................................26 3.13 Summary of Mass Wasting in Lewis County ........................................................................................29 3.14 Summary of Loss Associated with Mass Wasting in Western Washington..........................................30 3.15 Direct Damages to State Highways .......................................................................................................31 3.16 Direct Damages to Local Roads ............................................................................................................31 3.17 Summary of Statewide Freight Related Flood Impacts .........................................................................31 3.18 Lewis County Oil & Hazardous Materials Recovery ............................................................................34 3.19 Lewis County Drums, Containers & Tire Recovery..............................................................................34 3.20 Primary & Secondary Services ..............................................................................................................35 5.1 Funded/Completed Projects by Strategy Element ...................................................................................47 5.2 Unfunded Projects by Strategy Element..................................................................................................51 6.1 Possible Funding Sources ........................................................................................................................59 2A Changes in Lewis County Residential Assessed Valuation in 2007........................................................81 2B Changes in Lewis County Residential Assessed Valuation in 2008........................................................82 2C Changes in Lewis County Residential Assessed Valuation in 2008........................................................82 3A Estimate of Auto Delay Costs on I-5 due to 2007 Flood.........................................................................83 3B Estimate of Truck & Auto Delay Costs on SR 6......................................................................................84 5A Action Recommendations and Planning Level Costs Identified in Lewis County Flood Hazard Management Plan...........................................................................................................................................88 Figures 1.1 Boundaries of the Cowlitz-Lewis Economic Development District........................................................7 1.2 Lewis County Map...................................................................................................................................8 1.3 Satellite Map of December 2007 Storm...................................................................................................8 1.4 Overview of Lewis County......................................................................................................................9 2.1 Chehalis River Boundaries ......................................................................................................................13 2.2 Comparison of Peak Flows of 1996 & 2007............................................................................................16 3.1 Wind velocities during December 2007 Storm........................................................................................33 Maps 1: Lewis County 2007 Inundation Area.........................................................................................................67 2: Chehalis-Centralia 1996 and 2007 Inundation Areas Estimate.................................................................68 3: Lewis County 2007 Inundation of Agricultural Parcels ............................................................................69 4: Lewis County 2007 Inundation of Agricultural Parcels Pe Ell to Adna Area...........................................70 5: Lewis County 2007 Inundation of Agricultural Parcels Chehalis, Centralia, Galvin Area.......................71 6: Inundation Areas of Existing Land Use 1996 & 2007 Chehalis, Centralia, Galvin Areas........................72 7: Inundation Area of Exiting Land Use 1996 & 2007 Pe Ell to Adna Area ................................................73 8: Inundation Area by Generalized Zoning 1996 & 2007 Chehalis, Centralia, Galvin Area........................74 9: Inundation Area by Generalized Zoning 1996 & 2007 Pe ell to Adna Area.............................................75 10: Lewis county Public & Governmental Sites & Roads Damaged by 2007 Flood Event..........................76 11: Lewis County Wells Contaminated or Damaged by 2007 Flood Event..................................................77 12: Overlay of 1996/2007 Inundation Areas with Existing FEMA 100 & 500 Year Flood Plains Chehalis-Centralia Urban Area......................................................................................................................78 13: Overlay of 2007 Inundation Area with Existing FEMA 100 & 500 Year Flood Plains: Pe Ell to Adna
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