Hurricane Ike: 5 Years Later September 24-25, 2013 SSPEED Center RICE University

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1 Hurricane Ike: 5 Years Later September 24-25, 2013 SSPEED Center RICE University

2 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

3 Orange County sustained major damage from Hurricane Ike

4 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.

5 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

6 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)

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8 Alignment Area Protected (ac) Residential Structures Protected Population Protected Assessed Value Protected ID 5, $22,741,622 SR-NR 71,436 21,183 47,410 $2,121,107,223 NRW 10,888 9,341 21,642 $1,218,818,959 NRX 60,744 1,877 4,448 $219,196,026 SRX 29, $7,220,784 TOTALS 172,121 32,850 74,416 $3,566,342,992

9 2400 ft 1500 ft 1000 ft

10 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

11 Protection System Top Elevation Issues Ike Study Arcadis Scenarios with Shifted Ike storm Ike with DD7 levee (baseline) Ike with DD7 and OC levees

12 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

13 Shifted Ike Elevation Model

14 Protection System Top Elevations

15 Results Grading System Cost Estimates Conclusions and Recommendations

16 Grading System Benefit/Cost Analysis Losses avoided Design complexity Innovative design elements vs. proven technology Navigation considerations Maintenance and operations considerations

17 Alignment Alternative Total Cost ($) Grading System Rank No-Action $0 NA Orange County Protection - East Bank of Neches River (SR + NR) Protection System on East & West Bank of Neches River (SR + NR + NRW) County-Wide Protection with Neches River Crossing (SR + NX) County-Wide Protection with Neches River Crossing and Sabine River Crossing (SR + NX + SRX) Protection of Industrial Complex (ID) $1,472,000, $1,738,000, $1,540,000, $1,830,000, $212,000,000 35

18 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

19 QUESTIONS? SABINE-NECHES PROJECT GROUP Carroll & Blackman, Inc. Costello, Inc. LEAP/LJA Engineering, Inc.