STATUS OF USACE GALVESTON DISTRICT FLOOD RISK MANAGEMENT STUDIES AND PROJECTS American Council of Engineering Companies 19 July 2019 Andrew Weber, P.E. – Project Manager “ 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. ”
Presentation Purpose & Agenda Purpose: To provide an update on USACE Flood Risk Management (FRM) activates in the Galveston District Area of Responsibility (AOR) • Galveston District Overview • Funding Update • FRM Studies • FRM Construction • Conclusion
USACE Galveston District (SWG): 3 History and Mission ▪ First engineer district in Texas, established 1880 ▪ 50,000 square mile district boundary, ~100+ miles inland ▪ 28 ports handling 538+ M tons of commerce annually (FY 16) ▪ 1,000+ miles of channels − 750 miles shallow draft − 270 miles of deep draft ▪ 367 miles of Gulf coastline ▪ 30-40 M cubic yards/yr • Navigation (NAV) • Flood Risk Management material dredged (FRM) ▪ 16 Congressional districts • Coastal Storm Risk ▪ 48 Texas counties, Management (CSRM) 4 Louisiana parishes • Regulatory • Ecosystem Restoration (ER) ▪ 18 Coastal counties - bays / • Emergency Management estuaries • Interagency & International ▪ 9 coastal basins Support
Bipartisan Budget Act of 2018 (BBA’18) USACE – Galveston District Funded Projects Project Name Funding CONSTRUCTION Addicks and Barker Dam Safety (Phase 1) $1,454,000 Brays Bayou, TX $75,000,000 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 Two NAV new starts in FY19 Work Plan. *Sabine Neches Water Way CIP ($1.4B) *Cedar Bayou CIP ($54.4M)
SWG Acquisition Strategy – Tools Planned Supported Description/ Capacity PoP General SOW /Actual Award Programs $96M A-E Design Services – A-E Horizontal Design, $96M 6 Jun 2019 (A) 7 years Civil, IIS, Mil ** EDC, CPS MATOC Hydrographic Survey – Civil, IIS, Mil ** $7M 23 Sep 2019 5 years Hydrographic Survey MATOC Topographic Survey – Civil, IIS, Mil ** $10M 16 Aug 2019 5 years Land Survey and Mapping MATOC Geotech – Professional Services – $20M 30 Sep 2019 5 years Civil, IIS, Mil ** Geotech and Lab Testing MATOC A-E Design Services S2G Freeport – $72M 14 Aug 2019 8 years Supp only A-E Design, EDC, CPS SATOC A-E Design Services S2G Orange – $228M 29 Aug 2019 8 years Supp only A-E Design, EDC, CPS SATOC Supp Horizontal Construction – Primarily Supp, $7B 31 Dec 2020 8 years Horizontal Construction Civil, IIS, Mil MATOC Small Business Horizontal Construction $500M 31 Dec 2019 TBD Civil, IIS, Mil Horizontal Construction – MATOC ** Maximum use for Mil and IIS is $10M Supp = BBA 18 Supplemental Program PoP = Period of Performance
FRM Studies
Buffalo Bayou and Tributaries Resiliency Study, TX Authorization: Section 216 of Flood Control Act of 1970 Purpose: Flood Risk Management (FRM) Addicks Dam 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 Addicks Reservoir reservoirs and downstream along Buffalo Bayou Potential FRM Measures: • Additional reservoir/dam • Increased reservoir storage capacity • Tunnels • Diversions • Improved inflow and outlet discharge channels • Acquisition of flowage easements and buyouts Buffalo Bayou @ Below 59 Bridge • Changes in dam operation plan • Harris County may develop ways to better inform residents of their risks Status: 7 • Working towards Tentatively Selected Plan (April 2020) Buffalo Bayou @ Gessner
Houston Regional Watershed Assessment Authorization: Section 729 of WRDA 1986, as amended Type of Project: Flood Risk Management Project Phase: Feasibility Non-Federal Sponsor: HCFCD 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 Status: o Data collection underway
Brazos River, Fort Bend County, TX Authorization: Section 1201 of WRDA 2016 Purpose: Flood Risk Management Phase: Feasibility Non-Federal Sponsor: Fort Bend County 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 Status: o Working towards Tentatively Selected Plan
10 Coastal Texas Protection and Restoration Project Location: Coast of Texas Phase: Feasibility Study Authorized Study Cost: $19.8 M 50-50% FED-Non FED cost share thru FY19. FY20/21 will be 100% Federal (BBA 18) Non-Federal Sponsor: Texas General Land Office Scope: Coastal Storm Risk Management & Ecosystem Restoration along the Texas Coast Current Status: Public Review of draft report complete. 2 nd public comment period scheduled September 2020. Est. Study Completion Date: May 2021 http://coastalstudy.texas.gov/
FRM Construction
Addicks & Barker Dams 12 Construction Mega Project Location: Houston, Texas Program: Dam Safety (Phase 1) Phase: Construction Contract Amount: $75,139,529 Completion Date: June 2020 Project Status: 73% Complete Sponsor: 100% FED Purpose: Flood Risk Management Dam Safety Action Classification: DSAC 1 Dam Safety Issues: High risk associated with the seepage and piping beneath, around, and near the outlet works structure conduits Addicks Dam Barker Dam Population at Risk: 1.2 million Potential Economic Consequences: $60 billion Addicks New Outlet Structure
Addicks Structure Progress 21 Jan 19 1 3 Embankment Construction, 6 May 19 Aerial, 16 May 19 ACB installation, 2 May 19
Barker Structure Progress 1 4 Aerial, 16 May 19 Rebar installation for parabolic chute slab, 23 May 19 18 Dec 18
Clear Creek, TX Authorization: Flood Control Act of 1968/Sec 1043 of WRRDA 2014 Purpose: Flood Risk Management Phase: Preconstruction Engineering and Design Non-Federal Sponsor: HCFCD (constructing) Total Project Cost: $295M (remaining features) Project Features: • 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) Status: • PPA signed 6 June 2019 with HCFCD to provide them to construction project with Federal funds • HCFCD developing schedule of PED/construction
Supplemental Funded 16 Section211(F) Construction Projects • White Oak Bayou FRM Project: ($131 M; cost share 75% Fed/ 25% non-Fed)* • Hunting Bayou FRM Project: ($171 M; cost share 75% Fed/35% non-Fed)* • Brays Bayou FRM Project: ($506 M, balance to complete $74M; cost share 75% Fed/25% non-Fed)* * As modified by BBA 18.
Brays Bayou 17 Location: Houston, Texas Purpose: FRM Phase: Sec 211(f) - Construction by HCFCD, Reimbursement by USACE Non-Federal Sponsor: HCFCD Construction Completed: 2021 Authorized Total Project Cost: $506M Population at Risk: 350,000 Residents Status: • BBA’18 PPA executed Dec 2018 • HCFCD completed 90% design for last 8 of 32 bridge replacements to be reimbursed with supplemental funds • Continued construction, auditing and reimbursing costs pre-BBA 2018 with non-supplemental funding streams
White Oak Bayou 18 Location: Houston, TX Purpose: FRM Phase: Sec 211(f) - Construction by HCFCD, Reimbursement by USACE Non-Federal Sponsor: HCFCD Scope : Address flood risks of White Oak Bayou Costs: $45M FRM Measures: • Channel conveyance improvement from Cole Creek to FM 1960 • 4 detention basin with approx. 2,940 acre-ft of storage • 12 miles of a linear bikeway Status: • PPA Executed Dec 2018 • Design underway • Pre- BBA ’18 construction work continues
Hunting Bayou 19 Location: Houston, TX Purpose: FRM Phase: Sec 211(f) - Construction by HCFCD, Reimbursement by USACE Non-Federal Sponsor: HCFCD Scope : Address flood risks of Hunting Bayou Costs: $65M FRM Measures: • 3.8 miles grass-lined channel conveyance improvement • 75 acre detention basin • 17 bridge replacements/modifications Status: • PPA Executed Dec 2018 • Design underway • Pre- BBA ’18 construction work continues
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