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Corkscrew

Raw Water Source

Groundwater (sandstone aquifers)

Current Capacity

38,000m³/day

Capacity Increase

19,000m³/day (to 57,000m³/day)

Main Treatment Stages

Aeration; lime and carbon dioxide dosing; disinfection; filtration

Filter Media

Gravel / anthracite / sand

Expansion Project Elements (Corkscrew)

16.5m-diameter lime softening contact tank; lime storage silo and dosing equipment; four filter units; carbonisation basin; high volume air blowers; associated control systems; interconnection to Gree

Associated Elements (Green Meadows)

2 x 19,000m³ ground storage tanks; high service pumping station; new feed to existing transmission mains

Project Cost

$13m

Water Project Plans Approved

23 April 2002

Corkscrew Expansion Contract Awarded

8 July 2003

Project Engineers Appointed

18 November 2003

Completed

2007

Owner

Lee County

Operation

County Utilities Division

Main Contractor

Earth Tech

Design and Engineering Services

Johnson Engineering
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