Stormwater Treatment Area 3/4

Stormwater Treatment Area 3/4

Location: Palm Beach and Broward counties, Fla.

Client: South Florida Water Management District

Completion Date: 2004

Burns & McDonnell prepared the conceptual design and the general design memorandum for stormwater treatment area (STA) 3/4 and its associated features for the South Florida Water Management District as part of the Everglades Construction Project. Burns & McDonnell completed detailed designs and construction documents for the 16,600-acre STA, two pump stations with a combined capacity of 6,000 cfs, 19 miles of primary conveyance canals to and from the STA, new bridges on U.S. Highway 27, and a new water control structure in the North New River Canal. Burns & McDonnell also provided construction period engineering services for the entire project.

  • Ecosystem restoration
  • Water delivery systems
  • Alternatives analyses
  • Plan formulation
  • Plan implementation
  • Geotechnical investigations
  • Extensive hydraulic analyses and design
  • Water quality
  • Detailed design of levees, canals, structures and pumping stations
  • Construction engineering services
  • Operations and water control plan

Overall project timeline

Conceptual design: 1994
General design memorandum: 1996
Supply and L-5 canals design: October 2000
STA 3/4 design: April 2001
Complete construction: April 2004

  • Alternatives analyses for determination of final footprint and project features
  • Two-dimensional modeling of six cells within the STA under various operational scenarios (detailed modeling with FESWMS 2-D)
  • Analytical/statistical evaluation of historic data
  • Water management operational modeling (daily analyses of proposed STA operations over 31-year period, using simulated inflows from SFWMM regional model)
  • Water quality analyses (projections of project performance in phosphorus reduction)
  • One-dimensional hydraulic analyses of canals using HEC-RAS and UNET
  • Wave and wind action analyses over expansive heavily vegetated areas for establishing levee grades
  • Aquifer performance test and 2-D (SEEP2D) and 3-D (MODFLOW) groundwater modeling
  • Levee and canal design (40 miles and 29 miles, respectively)
  • Hydraulic analyses and final design of 49 water control structures
  • Design of  two pump stations, with a maximum capacity of 3,670 cfs
  • Design of new bridges for U.S. Route 27 and three canal crossings
  • Preparation of a draft operations plan
  • Cost estimation
  • Schedule preparation using Primavera