Sabine Pass to Galveston Bay, Texas Coastal Storm Damage Reduction and Ecosystem Restoration Project. An Update

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1 Sabine Pass to Galveston Bay, Texas Coastal Storm Damage Reduction and Ecosystem Restoration Project An Update Sharon Manzella Tirpak Project Manager 25 September 2013 US Army Corps of Engineers

2 Study Background Original study authorized in 2001 Focused on shoreline erosion and ecosystem restoration in Galveston and Jefferson Counties Study put on hold after Hurricane Ike In 2011 Texas General Land Office stepped up to be new non-federal Sponsor and the decision made to re-scope the project to the six-county area of the Upper Texas Coast

3 BUILDING STRONG

4 Re-scoping of Project In 2012 conducted public meetings, coordinated with local sponsor, resource agencies, and local governments across the six-county study area In January 2013 A Feasibility Cost Sharing Agreement was executed between the TX General Land Office (GLO) and the Corps Between January and July 2013 the input from the scoping meetings was screened and developed into an initial array of Coastal Storm Damage Reduction and Ecosystem Restoration Measures Measures were grouped by three major regional systems Sabine Lake System (Orange and Jefferson Co.) Galveston Bay System (Galveston, Harris, Chambers Co.) Brazos River System (Brazoria Co.)

5 Categories of Measures Large Levee Systems (reevaluate the existing three hurricane flood protection levees; evaluate proposed systems in Orange Co.) Galveston Bay Coastal Barrier Surge Gate and Barrier at Hartman Bridge Local Surge Protection Systems Raised Road surge barriers (SH 146, SH 87, CR 257) Gulf Shoreline Protection (chenier ridges, dune and beach restoration, nearshore breakwaters, groin) GIWW Shoreline Protection Bay Shoreline Protection Marsh Restoration Salinity/Water Control Structures

6 Formulation Analyses to Date Screened 250 measures and developed alternatives Gathered readily available information Developed Preliminary Economic benefits Utilized ADCIRC modeling of 100-year storm event (FEMA) Calculated damages using HAZUS & HEC-FIA (Flood Impact Analysis) Estimated Costs Class 5 costs (conceptual, rough order of magnitude) Some costs adopted from proponents estimates

7 Sabine Inland Barrier- TX CSRM Focus Includes: Neches River Navigation Gate, Sabine Levees, existing Port Arthur HFP Levee Implementation Costs: $1,613,611,000 Economic Benefits: $6,296,257,670 Net Excess Benefits: $4,682,646,670

8 Sabine Ecosystem Restoration Includes: dune & beach restoration, beach ridge restoration, nearshore breakwaters, GIWW shoreline protection, marsh restoration on Neches River & at Keith Lake and Tx Point, Salt Bayou hydrologic restoration, Sabine River Gate and surge barrier Implementation Costs: $4,292,454,951 Economic Benefits: $103,988,000 Net Excess Benefits: NA

9 Galveston Bay Inland Barriers CSRM Focus Includes: surge barrier and gates near Hartman Bridge, existing TX City HFP, Galveston ring levee, Chocolate Bayou ring levee, Hwy 146 raised road surge barrier Implementation Costs: $2,495,830,000 Economic Benefits: $11,568,219,620 Net Excess Benefits: $9,072,389,620

10 Galveston Bay Coastal Barrier CSRM Focus Includes: coastal barrier and gates Implementation Costs: $6,478,200,000 Economic Benefits: $14,042,424,000 Net Excess Benefits: $7,564,224,000

11 Galveston Bay Ecosystem Restoration Includes: dune & beach restoration, GIWW shoreline protection, marsh restoration, East Bay shoreline protection, closing Rollover Pass Implementation Costs: $3,809,994,500 Economic Benefits: NA Net Excess Benefits: NA

12 Freeport HFP Levee Reconstruction CSRM Focus Reconstruction of existing Freeport HFP Levee Implementation Costs: $123,784,337 Economic Benefits: $2,195,837,080 Net Excess Benefits: $2,072,052,743

13 Brazoria Ecosystem Restoration Includes: dune and beach restoration, groin, GIWW shoreline protection, and bay shoreline protection Implementation Costs: $1,569,482,000 Economic Benefits: NA Net Excess Benefits: NA

14 BUILDING STRONG

15 The Next Step? USACE is transitioning to new Planning Process, 3x3x3 Scope of current project is very large We are working with our Division Office and USACE Headquarters to determine way forward Will work with non-federal Sponsor, the GLO to determine way forward

16 Questions?