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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

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

  • 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
why desalination is needed in southwest florida
Why Desalination Is Needed In Southwest Florida
  • Years of drought
  • Overpumping from concentrated wellfields
  • Environmental stress to wetlands and lakes
swfwmd required reduction in wellfield withdrawals
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
master water plan
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
water master plan requirements
Water Master Plan Requirements
  • Diversified and sustainable
  • Limited new groundwater ( reduced total groundwater withdrawal)
  • Drought resistant
  • Reasonably priced
seawater desalination procurement process
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
  • 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


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

power plant co location
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
desalinated water quality
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
seawater concentrate disposal
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)
public acceptance
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
plant operational status
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
plant institutional status
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)
desalination is a reality in tampa bay
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