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Desalination Becomes A Reality In Tampa Bay Florida. Jim Jensen Senior Project Manager PB Water Area Manager Parsons Brinckerhoff Quade & Douglas, Inc. San Diego NBWA Water Conference April 2, 2004. Institutional. Tampa Bay Water regional water wholesaler Owns all significant wellfields

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Desalination becomes a reality in tampa bay florida l.jpg

Desalination Becomes A Reality In Tampa Bay Florida

Jim Jensen

Senior Project ManagerPB Water Area Manager

Parsons Brinckerhoff Quade & Douglas, Inc.San Diego

NBWA Water Conference

April 2, 2004

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  • Tampa Bay Water regional water wholesaler

    • Owns all significant wellfields

    • Regional distribution system

    • New surface WTP

  • Member governments

    • Hillsborough, Pasco & Pinellas counties

    • New Port Richey, St. Petersburg & Tampa

    • Operate their own WTPs

    • Retail water distribution systems

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Why Desalination Is Needed In Southwest Florida

  • Years of drought

  • Overpumping from concentrated wellfields

  • Environmental stress to wetlands and lakes

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SWFWMD Required Reduction In Wellfield Withdrawals

  • Average of 158 MGD pumped in 1998

  • Settlement required reduction in pumping to 121 MGD in 2003

  • Further reduction in pumping to 90 MGD by 2008

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Master Water Plan

  • $610 million capital improvement plan

    • Aggressive water conservation program

    • Skimmed surface water stored in above ground reservoir

    • Desalinated seawater

    • Desalinated brackish water

    • Limited new groundwater sources

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Water Master Plan Requirements

  • Diversified and sustainable

  • Limited new groundwater ( reduced total groundwater withdrawal)

  • Drought resistant

  • Reasonably priced

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Seawater Desalination Procurement Process

  • Desalinated water supply 20-35 MGD

  • Board initially not fully committed

  • Tampa Bay Water did not own a site

  • Developer responsible for water delivery system to point of connection

  • Design, Build, Own, Operate, Transfer

  • Co-funded capital costs by SWFWMD

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  • All 5 Pre-Qualified Developers Submitted

  • Approximately 23 options and alternatives submitted

  • Three sites proposed

  • MED, MVC and RO process

  • Power plant intake and discharge canals used

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Florida Seawater Desaliantion


Progress Energy/Ionics


Progress Energy Ionics



Florida Water Partners

Stone and Webster

1 Higgins Power Plant was eliminated

from further consideration.

2 Enova/SSI was not selected for

further evaluation.

Proposed Desalination Site Locations

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Power Plant Co-Location

  • Shares intake and outfall with power plant once through cooling water system

  • Tie in to power plant discharge pipeline on land

  • Increase in temperature increases production of desalinated water

  • Bay water salinity less than open seawater

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Desalinated Water Quality

  • Meets all local, State and Federal drinking water standards

  • Chloride maximum 100 mg/L (partial second pass)

  • Lime added to prevent corrosion

  • Disinfectant added to prevent biological growth in delivery pipeline

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Seawater Concentrate Disposal

  • 16.7 MGD concentrate mixed with 1,350 MGD cooling water flow = 70:1

  • Blended discharge increase ~2% at canal discharge point

  • NPDES Permit minimum blending ratio 20:1 (1 of 4 generators operating)

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Public Acceptance

  • Extensive public information and education program from proposal process through construction

    • Public Service Announcements

    • Editorial Board Presentations

    • Open House presentations/ Q&A

    • Focus Groups

    • Homeowner’s Associations, etc.

  • 70% Favorable for desalination

    • Concern about environmental impact

    • NIMBY

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Plant Operational Status

  • Began water production in March 2003

  • Excessive fouling problems

  • Did not pass Acceptance Tests

  • Operational and other changes reduce fouling, operational costs still to high

  • Production averages 22.5 MGD in February 2004 before shutdown for repairs

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Plant Institutional Status

  • Covanta notified of termination of O&M contract in October 2003

  • Covanta files for bankruptcy delaying repairs and termination

  • Board nominates Interim Operations, Maintenance and Management firms

    • American Water Services/Pridesa

    • Ionics/Montgomery Watson Harza

    • Veolia Water (USFilter Operating Services)

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Desalination Is A Reality In Tampa Bay

  • Pretreatment problems resulting in excessive fouling can be fixed

  • The Tampa facility meets all drinking water standards

  • The Tampa facility is capable of producing 25 MGD of potable water