IHNC Lake Borgne

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IHNC Lake Borgne HSDRRS Project Hurricane
Protection Office 22 August 2008
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Agenda

• IHNC Project Features
• GIWW Gate Construction
• GIWW Navigation Simulation
• GIWW Gate Guidewalls

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New Orleans AreaHurricane Storm Damage Risk
Reduction System
5 Parishes 350 Miles of Levee/Floodwall 73
Pumping Stations (Fed Non-Fed) 4 Gated Outlets
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Photos
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Photos
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GIWW Gates Open
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GIWW Gates Closed
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Marine Safety Plan

• Open Communications with Industry
• Contractor Navigation Traffic Control
• Embedded USCG LCDR with HPO
• Coast Guard Liaison, ATON, Emergencies
• New Orleans District Operations
• Mooring Dolphins
• Helper Tugboat

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Navigation Gate Study

• Modeling various navigation features for safety
• Bypass Channel Barge Gate
• GIWW Gate widths 110, 150, 200, 250
• Embedded USCG LCDR working for HPO/MVN
• Simulate Bypass Barge Gate by Oct 08
• Finish Simulation by Feb 09
• Safety First!

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Vessel Configurations
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IHNC Flotilla Report (Pre-Katrina)
barges
vessels
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Simulation Scenarios

• High Low Tides
• Flood Ebb Flow Velocities
• High Winds
• Extreme Tides During Frontal Systems
• Events Leading up to Severe Storms
• Closure Criteria

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Industry Option 1

• 300 Sector Gate
• No Guidewalls
• 150 Barge Gate

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Option 2

• 225 Sector Gate
• 250 Guidewalls
• 110 Barge Gate

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Option 3

• 150 Sector Gate
• 450 Guidewalls
• 150 Barge Gate

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Guidewalls
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450
250
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Guidewalls

• Steel concrete construction
• Fendering TBD
• Built to USACE/Industry standards
• Design impact load study on-going
• Some Floating Guidewalls needed

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IHNC ProjectPartnering