Coastal Protection and Restoration Advisory Committee 3 April 2006 D + 217 H - 59

One Team: Relevant, Ready, Responsive, Reliable1

US Army CorpsUS Army Corpsof Engineers of Engineers

Coastal Protection and RestorationCoastal Protection and RestorationAdvisory CommitteeAdvisory Committee

3 April 20063 April 2006

D + 217D + 217H - 59H - 59

New Orleans Hurricane ProtectionSystem Repair and Restoration



• Existing System

• Current Work

• Repair and Restoration

• Funding

• Summary

Agenda



Existing New Orleans Area Hurricane Protection

Legend

Federal Federal Non-COE Non-Federal



Southeast Louisiana Hurricane Protection Components

• Repair: • Return pre-Katrina protection to hurricane-damaged components by 1

June 2006• Restore:

• Restore undamaged levees/floodwalls to originally authorized heights by 1 Sep 2007

• Complete: • Accelerated completion of unconstructed portions of authorized projects

by Sep 2007• Improve:

• Make improvements to optimize the performance of the existing system• Certify:

• Raise system to provide 100 year level of protection• Higher Levels of Protection:

• Louisiana Coastal Protection and Restoration Report - preliminary report due June 2006, final December 2007

as of 3/30/06



Component Funded

Repair Existing System and Rebuild to Design Height $1,533

Complete Authorized System

New Orleans to Venice (Hurricane Protection) $ 33

West Bank and Vicinity (Hurricane Protection) $147

Lake Pontchartrain and Vicinity (Hurricane Protection) $120

Southeast Louisiana (Interior Flood Damage Reduction) $225

Grand Isle (Hurricane Protection) $ 15

Larose to Golden Meadow (Hurricane Protection) $ 4

TOTAL $2,077 M

Southeast Louisiana Hurricane Protection System Emergency

Supplemental Funding to Date ($M)



Southeast Louisiana Hurricane Protection

ADDITIONAL IMPROVEMENTSThe Bush Administration on February 16 asked Congress to support an additional $1.46 billion in new funding for improvements to southeast Louisiana’s hurricane protection system. If approved, the proposal would pay for:

- Permanent pumps and closures for New Orleans’ three outfall canals. ($530 million)- Two navigable closures that would prevent hurricane surge from entering the Industrial Canal area. ($350 million)- Storm-proofing existing interior drainage pump stations in Jefferson and Orleans Parishes. ($250 million)- Selective armoring for critical portions of the New Orleans levee system. ($170 million)- Incorporation of Plaquemines Parish west bank, non-federal levees into the federal levee system. ($60 million)- Restoration of critical areas of coastal wetlands and ecosystems needed to improve long-term hurricane and storm protection. ($100 million)



Hurricane Protection System Restoration Program Summary

53 % Complete

Hurricane Protection System• 350 miles• 71 pump stations

Damage• 41 miles severe, 128 miles

moderate damage• 34 pump stations were non-

operational

Cost• $ 770 Million

Percent of Pre-Katrina Protection Restored



Inner Harbor Navigation Canal

64 % Complete




Orleans East Bank

29 % Complete




New Orleans Outfall CanalInterim Closure Plan

• Three locations on Lake Ponchartrain

•Protection by 1 June 2006

•Provide New Orleans with rainwater drainage

• Prevent storm surge into canals

• Pumps permit drainage while closed



Outfall Canal Pumping Capacity

Interim Discharge Capacity

Planned Discharge Capacity

Total Inflow

Capacity

1 JUNE 2006

1 JULY 2006

30 SEP 2006

17th St. Canal 10,500 cfs 1,000 cfs 2,800 cfs 6,200 cfs

Orleans Canal 2,690 cfs 1,000 cfs 2,400 cfs 2,400 cfs

London Ave. Canal

7,980 cfs 1,000 cfs 2,800 cfs 4,300 cfs



New Orleans East

72 % Complete




Plaquemines Parish

72 % Complete




Saint Bernard Parish

74 % Complete




Levee System Total Length of System*

Levee Length Below Authorized

Floodwall Length Below Authorized

Orleans East Bank 19 miles 5.2 miles 14.4 miles

IHNC 12 miles 0.8 miles 7.6 miles

New Orleans East 39 miles 5.8 miles 6.0 miles

St. Bernard Parish 30 miles 5.2 miles 0.1 miles

Plaquemines Parish 109 miles 27.0 miles 0.0 miles

East Jefferson 16 miles 4.3 miles 0.5 miles

West Jefferson 66 miles 21.0 miles 6.0 miles

St. Charles 10 miles 6.0 miles 0.2 miles

Totals 301 miles 75.3 miles 34.8 miles

Levees / Floodwalls Not AtAuthorized Elevation

Due to Subsidence and Elevation Changes

* Includes Mississippi River Levees



Southeast Louisiana HPSEmergency Improvements

• Three locations on Lake Ponchartrain

• Prevent storm surge into canals

• Provide New Orleans with rainwater drainage

• Removes 14 miles of floodwalls from primary HPS

Outfall Canal Closures




• Two Locations:•Seabrook•GIWW/MRGO

• Precise location GIWW/MRGO yet to be determined

Navigable Flood Gates




• Prevents storm surge from

Industrial Harbor area• Removes 20 miles of levees and

floodwalls from primary HPS

Navigable Flood Gates




• Levees and floodwalls will be armored at critical points to resist damage from overtopping

• Transitions points between levees, floodwalls, and other structures will also be armored

Selective Armoring




• Dozens of pump stations in Orleans, Jefferson, St. Bernard, & Plaquemines Parish

• Each station is unique. Study underway to determine specific needs

• Potential improvements include emergency power supplies, raising critical equipment, waterproofing, and hardening

Storm Proof Pump Stations




• Raise and strengthen 23 miles of levees on West Bank in Plaquemines Parish

• Protect against storm-surge from Barataria Basin.

• Keep Highway 23 evacuation route open longer

Incorporate Non-Federal Levees




• Reversal of wetland losses in areas affected by navigation channels, oil and gas channels, or other channels and for modification of the Caernarvon Freshwater Diversion structure or its operation.

Ecosystem Restoration



Levee Certification

Current BFE

D

MSL

100 Yr StillwaterD/2 (Waves)

1 Foot Freeboard

BFE if Levee Not Certified

Addition Height Required

Geotechnical/Structural Integrity

as of 3/30/06



Costs to Certify Levee Systemsby Hydraulic Area



Costs to Certify Levees by Hydraulic Area – Details (Population)

* Area A will be certifiable in 2010 upon completion of the work already authorized and funded, as well as the work proposed in the Supplemental now before Congress. Sources: USACE, FEMA, HUD, Census

BFE Dollars Population

Deficiency Total %Cumulative

%Total % Cumulative %

A: Orleans East Bank ~ ft. $--* 0% 0% 150,373 34.1% 34.1%

B: Algiers 2.5 - 3.5 ft. $129 M 2% 2% 55,825 12.6% 46.7%

C: Jefferson East Bank / St. Charles

1.5 - 2.5 ft. $386 M 6% 9% 119,456 27.1% 73.8%

D: Jefferson West Bank

0.5 - 4.0 ft. $657 M 11% 20% 37,607 8.5% 82.3%

E: New Orleans East 0 - 3.5 ft. $710 M 12% 32% 34,827 7.9% 90.2%

F: St. Bernard / Lower 9th Ward

1.5 - 7.5 ft. $1,032 M 17% 49% 33,973 7.7% 97.9%

G: Belle Chase / Algiers East

2.5 - 4.0 ft. $161 M 3% 52% 3,654 0.8% 98.7%

H: Plaquemines West Bank

2.0 - 8.0 ft. $1,717 M 29% 81% 4,374 1.0% 99.7%

I: Plaquemines, Non-federal

2.5 - 7.0 ft. $520 M 9% 89% 981 0.2% 99.9%

J: Plaquemines East Bank

7.0 ft. $633 M 11% 100% 522 0.1% 100.0%



• Hurricane Katrina made landfall on 29 Aug 2005, overwhelming the hurricane protection system in the New Orleans area

• Temporary repairs and a massive un-watering effort was completed in 53 days

• An independent task force is evaluating the performance of the hurricane protection system

• Pre-Katrina protection restored by 1 June 2006

• Additional improvements will be completed by September 2007

• HPS Emergency Improvements being considered by Congress

• The South Louisiana Hurricane Protection and Restoration Technical Report - December 2007

Summary



QuestionsQuestions



Coastal Protection and RestorationCoastal Protection and RestorationAdvisory CommitteeAdvisory Committee

3 April 20063 April 2006

New Orleans Hurricane ProtectionSystem Repair and Restoration

Documents

Coastal Protection and Restoration Advisory Committee 3 April 2006 D + 217 H - 59