WCA3A3B Levee Seepage Management

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WCA-3A/3B Levee Seepage Management

• By
• Rod Ghioto, P.E. Max Day, P.E.
• Brown and Caldwell SFWMD

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Water Preserve Areas Background

• Water Supply Preserves
• East Coast Buffer Concept
• Comprehensive Everglades Restoration Plan

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Water Preserve Areas Program Objectives

• Water Supply
• Retain water in the natural system
• Capture and store water currently discharged to
  tide
• Reduce seepage from natural system
• Environmental Restoration
• Improve hydroperiods and water quality
• Provide a buffer between natural and developed
  areas
• Preserve and protect wetlands outside the
  Everglades (increase spatial extent)
• Flood Protection (incidental)

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Water Preserve Areas Projects

• C-11 Impoundment (BC)
• C-9 Impoundment (BC)
• WCA 3A/3B Seepage Management (BC)
• Acme Basin B (PBC)
• Site 1 Impoundment (PBC)
• North New River Improvements (BC)
• WCA 3 Flows to Central Lake Belt Storage Area
  (BC)
• WCA 2B Flows to Central Lake Belt Storage Area
  (partial) (BC M-DC)
• Strazzulla Wetlands (PBC)
• Dade Broward Levee and Canal (M-DC)
• C-4 Eastern Structure (M-DC)
• North Lake Belt Storage Area (partial) (M-DC)
• Central Lake Belt Storage Area (partial) (M-DC)
• Bird Drive Recharge Area (M-DC)

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WCA-3A and 3B Levee Seepage Management

• Ecosystem restoration
• Seepage reduction from WCA 3A/3B
• 156,000 ac-ft/yr
• Wetlands spatial extent enhancement
• Flood Protection (incidental)

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Elements

• Canals with Little or No Changes
• C-500A Canal L-37 Borrow Canal
• C-500B Canal L-33 Borrow Canal
• C-501 Canal L-30 Borrow Canal from C-6 to the
  southern boundary
• Canal Modifications
• C-502B Canal Diversion canal between the C-11
  and the C-9 Canals (US 27 canal)
• C-502B Canal (lined) Section of canal on the
  eastern border of Holly Lakes Mobile Home
  Community
• C-502C Canal Seepage canal around the Holly
  Lakes Mobile Home Community
• FPL Maintenance Access Road
• Runs nearly the entire length of the WCA 3A/3B
  Levee Seepage Management Area from I-75 to the
  C-6 Canal. Raise road by 1 foot
• 17 un-gated single barrel culverts 6 feet in
  diameter and 30 feet length
• 2 un-gated 3 - barrel culverts 6 feet in
  diameter and 30 feet length at FPL access road

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Elements (continued)

• Bridges
• B-500 Access to FPL substation from US 27
• B-501 Access to Holly Lakes Mobile Home
  Community from US 27
• Other potential access sites
• Levees
• L-502A Levee from L-37 Borrow Canal near I-75
  to the C-11 Canal along the eastern boundary.
  Spoil material take the place of levee in some
  areas
• L-502B Levee along the eastern boundary from
  C-11 Canal to the C-6 Canal spoil material will
  replace levee
• L-502C Levee around the Holly Lakes Mobile Home
  Community
• L-503 Levee at the eastern boundary (C-6 Canal
  to the southern boundary)

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Elements (continued)

• Pumps and Water Control Structures
• S-507 60 cfs Seepage Pump Station at Holly
  Lakes Mobile Home Community
• S-515 600 cfs gated culvert with 2-barrel
  culvert 8 feet in diameter and 60 feet length in
  the C-6 Canal at the east property line
• S-9XN and S-9XS Control structures in the C-500
  A B Canals
• Other Features
• Tracts 102-012 and 102-013 debris coverage
• Removal/isolation/containment
• Seepage protection, Jones Trailer Park
• Protection of existing fiber optics cables along
  the eastern border
• Clearing and grubbing and removal of exotics
• Appropriate monitoring activities

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Status and Targets

• Currently under design
• Completion August 2006
• Construction Completion Early 2009

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Questions