Brackish Groundwater Desalination Program Esther Harrah, P.E. SAWS Program Manager Norm Gadzinski Zachry-Parsons CMAR Representative March 28, 2014 TACWA Business Meeting March 28, 2014 Presentation Outline • Why Brackish Desalination • SAWS BGD Program • Program Components – Production Wells – Injection Wells – Conveyance System – Treatment Process • Progress to Date • Program Structure • Construction Manager at Risk • Schedule Page 2 Brackish Groundwater Desalination Program March 28, 2014 Why Brackish Desalination • Governor Perry’s 2002 Water Policy Initiative • Untapped resource – Close to San Antonio • Large volumes of available brackish water – Estimated over 2.7 billion acre-feet in Texas El Paso Utilities Kay Bailey Hutchison Desalination Plant Page 3 Brackish Groundwater Desalination Program March 28, 2014 How Brackish is Our Water? Water Quality Edwards Water ~ 250 – 500 mg/L TDS Seawater ~ 35,000 mg/L TDS Brackish Water > 1,000 mg/L TDS Brackish Water near San Antonio ~ 1,300 - 1,500 mg/L TDS Page 4 Brackish Groundwater Desalination Program March 28, 2014 Current SAWS BGD Program • Phase I (2016) – 13,440 Acre-feet/year – 12 MGD • Phase II (2021) – 13,440 Acre-feet/year – 12 MGD • Phase III (2026) – 6,720 Acre-feet/year – 6 MGD • Total – 30MGD – 33,600 Acre-feet/year • Largest inland groundwater desalination facility in the nation Page 5 Brackish Groundwater Desalination Program March 28, 2014 Phase I Scope of Work • 12 brackish water production wells • 12 MGD Reverse osmosis plant • 2 injection wells • Pipelines (12 miles) • Electrical/SCADA system • State of the Art Administration Bldg. • Planned yield of 12,210 Acre-feet/year Page 6 Brackish Groundwater Desalination Program March 28, 2014 Production Wells The Program will consist of 12 production wells drilled into the Wilcox Formation – Wells 1-8 have been drilled – Wells 9-12 will be drilled under the CMAR contract – Water quality for the wells are approximately 1,300-1,500 TDS – Production rates 800-1,000 gpm Page 7 Brackish Groundwater Desalination Program March 28, 2014 Concentrate Disposal Injection Wells One Test Injection Well has been drilled (June 2012) – Depth: 5,040’ – Injection Zone • Edwards Limestone • Upper Glen Rose Limestone – Native Edwards water salinity • 90,000 mg/L TDS Page 8 Brackish Groundwater Desalination Program March 28, 2014 RO Treatment Raw Water Blending 11.11 MGD 2 MGD 2 MGD Permeate/Treated Water 1.11 MGD Calcite Contactors Degasification Chlorination Pre-treatment AS: Anti-scalant CF: Cartridge Filter Post treatment Concentrate 13.11 MGD CF Product 10 MGD RO AS Acid 12 MGD Concentrate Disposal Well Page 9 Brackish Groundwater Desalination Program March 28, 2014 Plant Exterior – Main Entrance Page 10 Brackish Groundwater Desalination Program March 28, 2014 Interior View – Main Lobby/Foyer Page 11 Brackish Groundwater Desalination Program March 28, 2014 Exterior View – From Parking Lot Page 12 Brackish Groundwater Desalination Program March 28, 2014 Progress To Date Obtained $96M TWDB Loans 8 Production Wells Drilled 1 Injection Well Drilled Design – 100% Completed Addendum 1 – To Be Issued GMP Submitted/Approved Construction Amendment – Executed Permitting – Ongoing Construction Phase SMWB Outreach Bid Packages – Being Assembled CMAR Mobilize to Site – June 2014 Page 13 Brackish Groundwater Desalination Program March 28, 2014 Program Structure SAWS Esther Harrah Program Manager Black & Veatch Corp. Design Sub-Consultants Wells – LBG Guyton Water Plant – Tetra Tech Conveyance – URS Electrical/I&C – GAI - 4 Design Teams - 20 Design Sub-Consultants - 17 SMWB Firms - 21 Local Firms Construction Manager at Risk Zachry- Parsons Water Resources JV Bid Package Sub-Contractors Civil Site/Prep Water Conveyance Systems Water Treatment Plant Production Wells (Drill) Injection Wells (Drill) Prod and Inject Well Fit Out Instrumentation and Control Plant Security Landscaping/Paving Page 14 Brackish Groundwater Desalination Program March 28, 2014 Construction Manager At Risk (CMAR) Process allows: – Contractor’s input in the design – Engineer’s involvement in construction planning – Qualification based selection – Pursue SAWS SMWB goals – Guaranteed maximum price (GMP) Page 15 Brackish Groundwater Desalination Program March 28, 2014 Innovation is only possible when our convictions are open to scrutiny from others MacLeamy Curve 1 Ability to innovate/influence 2 Cost of design changes 1 3 Traditional design process 4 Integrated project delivery process Design Effort / Effect •Time / Schedule 2 Full team on board 4 W14-0028-002 3 Predesign Schematic Design Design Development Construction Documents Construction Source: Barbara Bryson Page 16 Brackish Groundwater Desalination Program March 28, 2014 CMAR Delivery Process Procure Designer Develop Design 30 – 90% Design Select CMAR Design Input GMP Pre-Construction Phase 100% Design Construction/Startup/Training/Transfer Operation “OR” •Owner •Designer •GMP = Guaranteed Maximum Price Page 17 Brackish Groundwater Desalination Program •CMAR March 28, 2014 Schedule Program Completion October 2016 GMP Board Award March 2014 2012 Program Manager (PM) Conceptual Design Construction Manager at Risk (CMAR) 2013 Design PreConstruction 2014 2015 Construction Management Services Construction 2016 2017 Commission Warranty Commission Warranty June, 2016 Mechanical Completion Page 18 Brackish Groundwater Desalination Program 2018 March 28, 2014 Guaranteed Maximum Price • Zachry Parsons Water Resources Joint Venture Guaranteed Maximum Price is $117,987,870 • Black & Veatch’s estimate for the work is $108,650,000 Page 19 Brackish Groundwater Desalination Program March 28, 2014 Guaranteed Maximum Price • CMAR will publicly bid each package and recommend most qualified bidder • The payment to CMAR will be based on actual cost of construction not to exceed the GMP • Should the actual cost be lower than the GMP, the difference will be a reduction to the GMP and that amount will be to SAWS credit Page 20 Brackish Groundwater Desalination Program March 28, 2014 Incentive/Liquidated Damages The CMAR contract includes a performance incentive not to exceed $750,000 for: – Under budget construction: $262,500; Budget = $108,650,000 – Early completion; Completion date October 2016 – Minimum change orders – Superior performance of the contract service Liquidated Damages will be assessed at: – $20K/day if mechanical completion is not completed by June 1, 2016 – $40K/day if behind by 180 days or more Page 21 Brackish Groundwater Desalination Program March 28, 2014 Questions? Page 22 Brackish Groundwater Desalination Program Brackish Groundwater Desalination Program Esther Harrah, P.E. SAWS Program Manager Norm Gadzinski Zachry-Parsons CMAR Representative March 28, 2014 TACWA Business Meeting March 28, 2014 Geologic Formation Wilcox Formation – Production Wells Land 1,000 ft. 1,226 ft. 1,784 ft. 1,804 ft. Not to Scale Page 24 Brackish Groundwater Desalination Program Stage 1 2.78 MGD 0.975 MGD TDS = 4300 0.42 MGD 130 2.22 MGD TDS = 7,500 Stage 3 1.8 MGD TDS = 30 0.42 MGD 130 Stage 3 AS* 1.8 MGD TDS = 30 Stage 2 0.42 MGD 130 RO concentrator trains To injection wells TDS = 15,000 OM = 0.08 0.56 MGD (Typ) Primary RO trains TDS in mg/L OM: O&M cost ($/1000 gal) O&M: $1.15 per 1,000 gal. for 12 MGD Facility Well * Deferred Item • AS: Anti-Scalant • CF: Cartridge Filter Page 25 Brackish Groundwater Desalination Program Post treatment Calcite contactor and degasification Train 1 1.11 MGD TDS = 30 Stage 2 0.975 MGD TDS = 4300 8.88 MGD 1.11 MGD 2.78 MGD 12 MGD TDS = 150 OM = 0.08 Stage 1 130 TDS = 50 OM = 0.47 1.8 MGD Stage 2 0.975 MGD TDS = 4300 0.42 MGD Train 2 Acid & AS CF 13.11 MGD Stage 2 0.975 MGD TDS = 4300 Stage 1 2.78 MGD TDS = 30 Train 3 TDS =1,500 OM = 0.24 2 MGD 2.78 MGD March 28, 2014 1.8 MGD Train 4 Stage 1 Chlorination TDS < 400 OM = 0.28 SAWS BGD Design March 28, 2014 RO Treatment • Reverse Osmosis (RO) – Membrane-technology filtration method – Removes many types of large molecules and ions from solutions – Use pressure to force water through a membrane Page 26 Brackish Groundwater Desalination Program March 28, 2014 What is Blending? • The treated water has low dissolved solids and requires additional chemical conditioning to match Edwards water quality • Bypass water will reduce the amount of conditioning required and will increase the amount of water produced Page 27 Brackish Groundwater Desalination Program
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