Performance Evaluation Of The New Orleans And Southeast Louisiana Hurricane Protection System - Final Report Of The Interagency - Performance Evaluation Task Force - Volume I – Executive Summary And O.pdf

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Performance Evaluation of the
New Orleans and Southeast Louisiana
Hurricane Protection System
Final Report of the Interagency
Performance Evaluation Task Force
Volume I – Executive Summary and Overview
1 June 2008
DRAFT FINAL
Volume I –
Executive Summary and Overview
Volume II –
Geodetic Vertical and Water Level Datums
Volume III –
The Hurricane Protection System
Volume IV –
The Storm
Volume V –
The Performance – Levees and Floodwalls
Volume VI –
The Performance – Interior Drainage and Pumping
Volume VII –
The Consequences
Volume VIII –
Engineering and Operational Risk and Reliability Analysis
Volume IX –
General Appendices
DISCLAIMER:
The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade
names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks
cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army
position unless so designated by other authorized documents.
Volume I
Executive Summary and Overview
Contents
Preface....................................................................................................................................................... I-iv
Executive Summary ....................................................................................................................................I-1
Introduction ..........................................................................................................................................I-1
Summary of Findings ...........................................................................................................................I-2
Summary of Lessons Learned ..............................................................................................................I-4
Looking Forward..................................................................................................................................I-6
Overview.....................................................................................................................................................I-9
Interagency Performance Evaluation Task Force (IPET).....................................................................I-9
Establishment and Mission ............................................................................................................I-9
Objectives.....................................................................................................................................I-10
Organization and Activities .........................................................................................................I-10
Review Process ............................................................................................................................I-12
Prior Reports ...............................................................................................................................I-13
Report Organization and Content................................................................................................I-15
Overall Uncertainty of IPET Analysis .........................................................................................I-21
Hurricane Katrina and Its Impact .......................................................................................................I-26
Historical Perspective..................................................................................................................I-27
The System (Volumes II and III) ..................................................................................................I-32
The Storm (Volume IV) ................................................................................................................I-36
The Performance (Volumes V and VI) .........................................................................................I-45
The Consequences (Volume VII)..................................................................................................I-54
The Risk (Volume VIII) .....................................................................................................................I-62
Risk Assessment Approach...........................................................................................................I-62
Risk Assessment Methodology .....................................................................................................I-65
Risk Assessment Results ...............................................................................................................I-87
Principal Findings and Lessons Learned ................................................................................................I-116
Principal Findings.............................................................................................................................I-116
The System (see Volumes II and III) ..........................................................................................I-116
The Storm (see Volume IV) ........................................................................................................I-118
The Performance (see Volumes V and VI) .................................................................................I-120
The Consequences (see Volume VII)..........................................................................................I-122
The Risk (see Volume VIII) ........................................................................................................I-123
Principal Lessons Learned................................................................................................................I-124
The System (see Volumes II and III) ..........................................................................................I-124
The Storm (see Volume IV) ........................................................................................................I-125
The Performance (see Volumes V and VI) .................................................................................I-127
The Consequences (see Volume VII)..........................................................................................I-128
The Risk (see Volume VIII) ........................................................................................................I-128
Knowledge and Expertise ..........................................................................................................I-131
Other Studies..............................................................................................................................I-132
I-ii
Volume I Executive Summary and Overview
This report is the independent opinion of the IPET and is not necessarily the official position of the U.S. Army Corps of Engineers.
Appendix 1. IPET Leadership, Affiliations, and Organizations ............................................................. I-1-1
Appendix 2. American Society of Civil Engineers External Review Panel Members ........................... I-2-1
Appendix 3. National Research Council Committee Members .............................................................. I-3-1
Appendix 4. Task Force Guardian Input................................................................................................. I-4-1
Appendix 5. Regional Geology and History........................................................................................... I-5-1
Appendix 6. Distribution of Hurricane Protection System Structures.................................................... I-6-1
Appendix 7. Post-Katrina Hurricane Protection System Elevations Relative to Authorized
Elevations................................................................................................................................... I-7-1
Appendix 8. Maps and Associated Descriptions of Breach Sites ........................................................... I-8-1
Appendix 9. Risk Assessment Supporting Data ..................................................................................... I-9-1
Appendix 10. Inundation Depth Frequency Maps ................................................................................ I-10-1
Appendix 11. Loss of Life Risk Maps .................................................................................................. I-11-1
Appendix 12. Property Loss (Percentage of Total Value) Risk Maps.................................................. I-12-1
Volume I Executive Summary and Overview
I-iii
This report is the independent opinion of the IPET and is not necessarily the official position of the U.S. Army Corps of Engineers.

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