Floodproofing Methods That Work In West Virginia

US Army Corps of Engineers BUILDING STRONG®

Floodproofing Methods that Work in West Virginia Joe Trimboli, MSc, CFM Community Planner

Huntington District

17 March 2011

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NFRMP

National Flood Risk Management Program Corps Program to integrate and

synchronize USACE flood risk management programs and activities, both internally and with counterpart activities of the Department of Homeland Security, Federal Emergency Management Agency (FEMA), other Federal agencies, state organizations, and regional and local agencies.

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Silver Jackets

Continuous collaboration between state and Federal agencies to reduce flood risk and other natural disasters and to enhance response and recovery efforts State teams lead by State NFIP

Coordinator (flexible structure) West Virginia Flood Risk Communication

Taskforce

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NFPC

National Nonstructural Flood Proofing Committee (NFPC) Evolved from Floodplain Management

Services Program (CORPS FPMS) Committee on Residential Flood Proofing

(1978) Coordinates and provides direction to

flood proofing activities

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Local Flood Proofing Programs

NFPC Publication (2005) Proven approaches to reducing flood

damage Significant flood loss reduction

►Financial ►Technical ►Environmental

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Government Programs

FEMA Mitigation Assistance (FMA) Program ►Planning Grants ►Project Grants ►Management Cost Grants

Corps of Engineer Authorities ►Flood Plain Management Services (FPMS) ►Planning Assistance to States (PAS) ►Special Studies (Congressional Add) ►Section 202 (Tug Fork / Levisa Fork)

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Reduction Measures

Emergency Measures ► Sandbagging, Flood Warning Systems...

Structural Measures ► Levees, Dams, Channels...

Relocation Measures ► Move, Purchase, Demolition...

Modification Measures ► Building Modifications, Lot Enhancements...

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WV Example – Wayne County

Section 202 (Congressional Add) 33.5 miles of the main stem Tug Fork Protection - April 1977 flood reoccurrence 66 structures

►39 floodproofed structures ►27 voluntary floodplain acquisitions

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Extended Foundation

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Ring Wall

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Ring Wall

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Space Replacement

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Extended Foundation

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Extended Foundation

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Extended Foundation

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Extended Foundation

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Relocation

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Extended Foundation

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Extended Foundation

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Extended Foundation

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Most Used FRM WV

Elevation / Wet Floodproofing Relocation

►Acquisition ►Move on property ►Space Replacement

Dry Floodproofing Ring walls

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Restrictions

No improvements Work must meet local code Porches (no matter material) are replaced

with Treated Lumber No damageable materials below flood

protection level Space replacement only includes “Living

Space”

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Opportunities

Buy Up to Floodproofing Home Improvements allowed

►Paid by Homeowner Structurally unsound – cost comparison

►Least expensive ►Acquisition vs Comparable New Construction

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Program Evaluation

Elevation Relocation Levees and Floodwalls

Dry Flood Proofing

Wet Flood Proofing

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Selection Factors

Site Characteristics

Building Characteristics

Flood Characteristics

Depth Velocity

Flash Debris

Location Soil

Foundation Construction

Condition

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Formulation Matrix

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Matrix Highlight

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Community Flood Proofing Benefits

Customer service Economics Comprehensive planning External impact The Community Rating System Post-flood mitigation funding

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National Plan

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Flood Risk Management Cycle

• Report Impacts • Systems Performance • Support Flood Fighting • Emergency Stabilization

• Repair Damage • Assess & Document • Identify Mitigation Opportunities

• Future Mitigation • Develop & Implement Improvements • Modify Mitigation Plan • Interim Risk Reduction Measures

• Flood Fighting Prep • State & Local Coord • System Assessments & Inspection • Forecasting / Scenario Development

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Summary

Organization and Team Work

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References National Flood Risk Management Program (NFRMP)

http://www.nfrmp.us/ Silver Jackets

http://www.nfrmp.us/state/ National Nonstructural Flood Proofing Committee (NFPC)

http://www.nwo.usace.army.mil/nfpc/ Local Flood Proofing Measures NFPC 2005

http://www.nwo.usace.army.mil/nfpc/Local_FP_Programs_February_2005.pdf

Flood Damage Reduction Matrix NFPC 2007 http://www.nwo.usace.army.mil/nfpc/NFPC_Measures_Matrix

.pdf Huntington District

http://www.lrh.usace.army.mil/

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QUESTIONS?

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