SWG Dredging Conference. Status of Corps Studies and Projects

Transcription

1 SWG Dredging Conference Status of Corps Studies and Projects Byron Williams, PMP Sheridan Willey, P.E. Chief, Project Management Deputy Chief, Project Management USACE, Galveston District USACE, Galveston District November 8, 2018 The views, opinions and findings contained in this report are those of the authors(s) and should not be construed as an official Department of the Army position, policy or decision, unless so designated by other official documentation.

2 Galveston District Projects 2 Deep-Draft Channels Sabine-Neches Waterway Houston Galveston Navigation Channels o Entrance Channel o Galveston Harbor & Channel o Houston Ship Channel o Bayport/Barbours Texas City Channel Freeport Channel Matagorda Ship Channel Corpus Christi Ship Channel o Main Channel o LaQuinta Channel o Brazos Island Harbor Shallow-Draft Channels Gulf-Intracoastal Waterway Cedar Bayou Chocolate Bayou Channel to Victoria Channel to Harlingen Flood Risk Management Projects Greens Bayou Sims Bayou Clear Creek Raymondville Drain

3 3 Current Projects and Studies for Deep-Draft Channels

4 Sabine Neches Waterway, TX 4 Location: Southeast Texas Purpose: Navigation Phase: Preconstruction Engineering and Design (PED) Non-Federal Sponsor: Sabine Neches Navigation District Project Description: Deepening of channel to 48 feet MLLW Authorized Total Project Cost: $1.3B Date Completed: Finalize Plans & Specs (P&S) FY 2020 Current Status: Working towards completion of 1 st set of P&S for construction

5 Houston Ship Channel, TX 5 Location: Houston, Texas Purpose: Navigation Phase: General Investigations (GI) (Feasibility) Non-Federal Sponsor: Port of Houston TSP Description: bay widening and bend easings, bayou widening and deepening, multipurpose mooring, shoaling attenuation feature, turning basins Study Cost: $10M Est. Study Completion: Oct 19 Current Status: Working on Feasibility-level design and Final Report

6 Galveston Channel Extension 6 Location: Galveston, Texas Purpose: Navigation Phase: PED Non-Federal Sponsor: Port of Galveston Project Description: extending the 45 foot deep Galveston Harbor Channel the additional 2,571 feet to reach the end of the limits of the existing 40 foot channel Cost: $1.6M Est. Construction Completion: 2020 (Contract Award) Current Status: Developing the Design Agreement to initiate PED

7 Freeport Harbor, TX 7 Location: Freeport, Texas Purpose: Navigation Phase: PED Non-Federal Sponsor: Port Freeport Project Description: Deepening from -46 feet MLLW to -51/56 ft MLLW and Extending federal channel into Upper Stauffer Est. Total Project Cost: $274M Est. Construction Completion: FY2023 Current Status: Initiating PED

8 Matagorda Ship Channel, TX 8 Location: Calhoun & Matagorda Counties Purpose: Navigation Phase: GI (Feasibility) Non-Federal Sponsor: Calhoun Port Authority Study Scope: Improve the navigational efficiency and safety of the deep-draft navigation system TSP Description: Main Channel: 47 depth, 350 width Turning Basin: 47 depth. 1,200 width Entrance Channel: 49 depth, 600 width Study Cost: $3M (50/50 with Calhoun Port Authority) Est. Study Completion: August 2019 Current Status: Completion of the feasibility-level design and editing of final report

9 Corpus Christi Ship Channel, TX 9 Location: San Patricio and Nueces Counties, Texas Purpose: Navigation Phase: Construction Main Channel & Barge Lanes Non-Federal Sponsor: Port of Corpus Christi Authority Project Description: Deepen existing 47-foot deep MLLW channel to 54 feet MLLW and widen channel across bay from 400 to 530 feet. Est. Total Project Cost: $350M (224.5M Fed & 125.7M Non-Fed) Est. Project Completion: FY 2022 Current Status: Negotiation of Entrance Channel Contract, Preparing 65% P&S & DDR

10 Corpus Christi Ship Channel (LaQuinta), TX 10 Location: San Patricio and Nueces Counties, Texas Purpose: Navigation Phase: General Investigation (Feasibility) Non-Federal Sponsor: Port of Corpus Christi Authority Project Description: Deepening the existing -47 feet to -54 feet MLLW and widening from 400 feet to an underdetermined width to accommodate increased vessel traffic from new and existing industries. Est. Total Study Cost: $3M (50% Fed/50% NFS) Est. Study Completion: 3 years Current Status: Initiation of feasibility phase

11 Brazos Island Harbor, TX 11 Location: Brownsville, Texas Purpose: Navigation Phase: Sections 204(f),10 & 404 (Non-Federal Sponsor work) Non-Federal Sponsor: Brownsville Navigation District Project Description: Deepen existing 42 feet MLLW channel to depth of 52 feet MLLW Est. Total Project Cost: $285M Est. Project Completion: 2023 Current Status: Non-Federal Sponsor to construct authorized project. Memorandum of Agreement executed for review of Section 204(f) AOM report prepared by Non-Federal Sponsor.

12 12 Current Projects and Studies for Shallow-Draft Channels

13 Cedar Bayou, TX 13 Location: Galveston Bay in Liberty County, Texas Purpose: Navigation Phase: Construction Non-Federal Sponsor: Cedar Bayou Navigation District Project Description: Extending channel by 8 miles to HWY 146 Est. Project Completion: 3 contracts in a 3-year period Current Status: Economic update prepared in 2015 to include Sec benefits. Preconstruction Engineering & Design was completed in Awaiting construction funding.

14 Chocolate Bayou, TX 14 Location: Brazoria Co, Texas Purpose: Navigation Phase: Construction- Last Contract Non-Federal Sponsor: Brazoria Co. Conservation & Reclamation Dist. #3 Project Description: Dredge Material Disposal Facilities Est. Total Project Cost: $37.5M (Fed and Non-Fed) Est. Contract Award: TBD (pending receipt of funding) Current Status: Awaiting funding to complete final contract

15 GIWW, Brazos River Floodgates & Colorado River Locks, TX15 Location: Gulf Intracoastal Waterway from Brazos River to Colorado River Purpose: Navigation Phase: Feasibility Non-Federal Sponsor: 100% Federal & TXDOT (Partner) Study Scope: Improve safety and navigation efficiency on the GIWW Total Study Cost: $3M Est. Completion: Sep 19 Current Status: Completion of the feasibility-level design and editing of final report GIWW Colorado River Locks GIWW Brazos River Floodgates

16 16 Baseline Projects for Flood Risk Management

17 Greens Bayou 17 Location: Houston, Texas Purpose: Flood Damage Reduction Phase: Construction (ongoing) Non-Federal Sponsor: HCFCD Project Description: Estimated Total Project Cost: $63M Current Estimated Completion Cost: $4M Current Status: Work began in 2015 and physical completion is anticipated in March 2020 Population at Risk: 8,200 Potential Economic Consequences: $10M

18 18 Supplemental-Funded Projects for Flood Risk Management

19 Bipartisan Budget Act of 2018 Title IV - Corps of Engineers Investigations $75M (of $135M total) for States and areas impacted by Harvey, Irma, and Maria Full Federal expense Reduce flood and hurricane risk Construction $10.425B (of $15B total) for States and areas impacted by Harvey, Irma, and Maria NFS cash contribution financed over 30 years post construction completion Construct flood and storm damage reduction projects authorized/chief s Reports/studies under investigations Implementation Guidance and Investment Program: Civil-Works/Budget/ USACE Galveston District Funded Projects Project Name Funding CONSTRUCTION Brays Bayou, TX $75,000,000 Addicks and Barker Dam Safety (Phase 1) $1,454,000 Clear Creek, TX $295,165,000 Hunting Bayou, TX $65,000,000 Lower Colorado River (Wharton, TX) $73,290,000 Sabine Pass to Galveston Bay, TX $3,957,134,000 White Oak Bayou, TX $45,000,000 TOTAL CONSTRUCTION $4,512,043,000 GENERAL INVESTIGATION STUDIES Coastal Texas Protection & Restoration Study, TX $3,804,000 Buffalo Bayou Resiliency Study, TX $6,000,000 Houston Regional Watershed Assessment, TX $3,000,000 Brazos River Erosion Management Study, TX $3,000,000 TOTAL STUDIES $15,804,000

20 Sabine Pass to Galveston Bay Project ECONOMIC SUMMARY Estimated First Cost from report: $3,248,606,000* NED Net Benefits: $300,043,000 Benefit-to-Cost Ratio: 3.1 to 2.88% Annual O&M: $5,467,000 * inflated to current costs of $3,957,134,000 Freeport & Vicinity: System length: 43.3 mi Length of levee raise: 69,375 ft Length of new floodwall: 29,255 ft Orange County: Proposed System length: miles Length of new levee: miles Length of new floodwall: miles Port Arthur & Vicinity: System length: 29.2 mi Length of levee raise: 29,200 ft Length of new levee: 1,830 ft Length of new floodwall: 30,090 ft

21 Addicks & Barker Reservoir Dam Safety Modification Study, Phase 1 Location: Houston, Texas Program: Dam Safety (Phase 1) Phase: Construction (ongoing) Non-Federal Sponsor: 100% FED Authorized Total Project Cost: $129.9M Current Estimated Completion Cost: $95M Purpose: Flood Damage Reduction Dam Safety Action Classification: DSAC 1 Dam Safety Issues: High risk Barker Dam Addicks Dam associated with seepage and piping beneath, around, and near outlet works structure conduits Population at Risk: 1.2M Potential Economic Consequences: $60B Addicks New Outlet Structure

22 Clear Creek, TX Authorization: Flood Control Act of 1968 Purpose: Flood Risk Management Phase: Potential New Start Construction Capability Non-Federal Sponsor: Harris County Flood Control District Total Project Cost: $295M (remaining features) Project Features: Completed: Second Outlet Gate completed in 1991; Channel completed in Prevents saltwater intrusion Turned over to HCFCD for operation Remains to be completed: 15.2 miles of high flow channel benches; leaving intact the existing low flow stream bottom ecology In line detention basins (485 acre-foot) 2.4 miles of Turkey Creek widening (Dixie Farm Rd to confluence with Clear Creek) 0.8 miles of Mud Gully concrete-lined (Sagedowne to Astoria) 2.1 miles of Mary s Creek (Harkey Rd to SH 35)

23 Brays Bayou 23 Location: Houston, Texas Purpose: Flood Damage Reduction Phase: Construction Non-Federal Sponsor: Harris County Flood Control District Construction Completed: 2021 Authorized Total Project Cost: $506M Population at Risk: 350,000 Residents Potential consequences if construction isn t completed: 12 Police & Fire Stations 24 Hospitals 138 Health Clinics 88 Pharmacies 51 Public School 40,000 Homes

24 Hunting Bayou Location: Houston, TX Purpose: FRM - New Study Start 211f Project Non-Federal Sponsor: Harris County Flood Control District Scope: Address flood risks of Hunting Bayou Costs: $65M Potential FRM Measures: 3.8 miles grass-lined channel conveyance improvement 75 acre detention basin 17 bridge replacements/modifications 24

25 White Oak Bayou Location: Houston, TX Phase: FRM New Study Start 211f Project Purpose: Flood Risk Management Non-Federal Sponsor: Harris County Flood Control District Scope: Address flood risks of White Oak Bayou Costs: $45M Potential FRM Measures: Channel conveyance improvement from Cole Creek to FM detention basin with approx. 2,940 acre-ft of storage 12 miles of a linear bikeway 25

26 Lower Colorado River Basin (Wharton), TX Authorization: Section 1001(43) of WRDA 2007 Type of Project: Flood Risk Management (FRM) Project Phase: Construction Non-Federal Sponsor: City of Wharton Authorized Total Project Cost: $73,290,000 Project Features: The Wharton project, a separable element of the overall Lower Colorado River Phase I Project, consists of approximately 35,600 feet of levees, 2,300 feet of floodwalls, 7,000 feet of channel modifications, and interior drainage features

27 27 Supplemental-Funded Studies for Flood Risk Management

28 Coastal Texas 28 Location: Coastal Texas Purpose: Coastal Storm Risk Management & Ecosystem Restoration Phase: Feasibility Study Non-Federal Sponsor: Texas General Land Office Est. Completion Date: April 2021 Population at Risk: 7,120,000+ (25% of the state s total pop.) Potential Economic Consequences: 5 million barrels of oil per day refined in the area UTMB employs 11,000+ people NASA employs 3,000+ people Several large petrochemical plants Dow, BP, Enterprise

29 Buffalo Bayou and Tributaries Resiliency Study, TX Authorization: Section 216 of Flood Control Act of 1970 Purpose: Flood Risk Management (FRM) Phase: Feasibility Non-Federal Sponsor: Harris County Flood Control District Scope: Address residual risks associated with flood risk impacts to structures in the pool area upstream of both reservoirs and downstream along Buffalo Bayou Potential FRM Measures: o Additional reservoir/dam o Increased reservoir storage capacity o Reservoir water level equalization o Improved outlet discharge capacity o Improved inflow and outlet discharge channels o Acquisition of flowage easements and buyouts o Changes in dam operation plan o Risk Communication Strategies Addicks Dam Buffalo Gessner Buffalo Below 59 Bridge

30 Brazos River, Fort Bend County, TX Authorization: Section 1201 of WRDA 2016 Purpose: Flood Risk Management (FRM) Phase: Feasibility Non-Federal Sponsor: Fort Bend County, TX Scope: Investigate stream bank measures to reduce or mitigate erosion losses, reduce the impacts of increased flood risk and provide protection benefits for the above listed public and infrastructure Potential FRM Measures: o Levees o Shoreline stabilization features

31 Houston Regional Watershed Assessment Authorization: Section 729 of WRDA 1986, as amended Type of Project: Flood Risk Management (FRM) Project Phase: Feasibility Non-Federal Sponsor(s): Harris County Flood Control District Scope: o Characterize performance of flood risk management features in the Metropolitan Houston Region as an integrated system of 22 watersheds o Understand how development patterns are affecting watershed hydrology across systems o Update statistics of extreme precipitation events for systems simulation to explain current and future potential flooding problems

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