Hurricane Ike. Natural Hazards and Disasters Chapter 5 Tsunami.
Hurricane Ike: 5 Years Later September 24 -25, 2013 SSPEED...
Transcript of Hurricane Ike: 5 Years Later September 24 -25, 2013 SSPEED...
Hurricane Ike: 5 Years Later September 24-25, 2013
SSPEED Center – RICE University
Orange County Hurricane Flood Protection System Feasibility Study
Background Orange County sustained major damage from Hurricane Ike County Commissioners authorized expenditure of some Disaster
Recovery funds to conduct a study Team of Carroll & Blackman, Inc., Costello, Inc., and LEAP/LJA
Engineering was selected as study engineer team TWDB Planning Grant for 50% of study cost was awarded in
March 2010
Orange County Hurricane Flood Protection System Feasibility Study
Orange County sustained major damage from Hurricane Ike
Orange County Hurricane Flood Protection System Feasibility Study Study Purpose The purpose of the study was to consider and evaluate the feasibility of construction of a Hurricane Flood Protection System to provide the County with a strategy to address goals for flood protection and loss reduction.
Orange County Hurricane Flood Protection System Feasibility Study Key Design Issues/Parameters Level Of Protection H & H Design And Pump Station Sizing Earthen Levee Design Floodwall Design Right-of-way Crossings - Transportation, Pipelines, Utilities, Power Navigation Considerations Geotechnical Study Environmental And Cultural Resources
Orange County Hurricane Flood Protection System Feasibility Study Review Alignment Alternatives County-wide protection with gate on the Neches River County-wide protection with levee on east and west
bank of the Neches River Industrial Complex (Chemical Row) protection system County-wide protection with gate on the Neches River
and Sabine River crossing (SWB location)
AlignmentArea Protected
(ac)
Residential Structures Protected
Population Protected
Assessed Value Protected
ID 5,276 114 236 $22,741,622
SR-NR 71,436 21,183 47,410 $2,121,107,223NRW 10,888 9,341 21,642 $1,218,818,959NRX 60,744 1,877 4,448 $219,196,026SRX 29,052 449 916 $7,220,784
TOTALS 172,121 32,850 74,416 $3,566,342,992
1000 ft
2400 ft
1500 ft
Orange County Hurricane Flood Protection System Feasibility Study Protection System Top Elevation Issues
Ike Study – Arcadis Scenarios with Actual Ike storm Ike with DD7 levee (baseline) Ike without DD7 levee (showed effect of DD7
levee on OC during IKE) Ike with DD7 and OC levees
Orange County Hurricane Flood Protection System Feasibility Study Protection System Top Elevation Issues
Ike Study – Arcadis Scenarios with Shifted Ike storm Ike with DD7 levee (baseline) Ike with DD7 and OC levees
Orange County Hurricane Flood Protection System Feasibility Study Protection System Top Elevation Issues
Ike Study – Arcadis Scenarios with Shifted Ike storm Ike with DD7 levee (baseline) Ike with DD7 and OC levees
500 year storm equivalent
Shifted Ike Elevation Model
Orange County Hurricane Flood Protection System Feasibility Study Protection System Top Elevations
Orange County Hurricane Flood Protection System Feasibility Study Results Grading System Cost Estimates Conclusions and Recommendations
Orange County Hurricane Flood Protection System Feasibility Study Grading System Benefit/Cost Analysis Losses avoided Design complexity Innovative design elements vs. proven technology Navigation considerations Maintenance and operations considerations
Orange County Hurricane Flood Protection System Feasibility Study
Alignment Alternative Total Cost ($) Grading System
Rank
No-Action $0 NA
Orange County Protection - East Bank of Neches River (SR + NR)
$1,472,000,000 63
Protection System on East & West Bank of Neches River (SR + NR + NRW)
$1,738,000,000 74
County-Wide Protection with Neches River Crossing (SR + NX)
$1,540,000,000 47
County-Wide Protection with Neches River Crossing and Sabine River Crossing (SR + NX + SRX)
$1,830,000,000 60
Protection of Industrial Complex (ID)
$212,000,000 35
Orange County Hurricane Flood Protection System Feasibility Study Conclusions and Recommendations Develop a Preliminary Engineering Report (PER) of the
Neches River Crossing and Sabine River Alignment and the Industries Alignment as a possible First Phase of construction.
Investigate Potential Funding and Financing Sources
Investigate Potential Management and Operations Entities
Orange County Hurricane Flood Protection System Feasibility Study
QUESTIONS?
SABINE-NECHES PROJECT GROUP Carroll & Blackman, Inc.
Costello, Inc. LEAP/LJA Engineering , Inc.