Great Neck Water Pollution Control District, Wastewater Treatment Plant Expansion

Posted on July 8, 2015

Client: Great Neck Water Pollution Control District
Location: 2008-2014
Project Type: Structural Engineering – Design/Construction Services
Project Period: $60 Million

Major Components

  • Geotechnical Investigations
  • Cost Estimating
  • Well-point Dewatering
  • Grout-injected Steel Pipe Piles
  • Pre-augered Grout-injected Steel Pipe Piles
  • Mat-foundation Design
  • Free-standing Water-retaining (ACI-350) 20-foot high x 240-foot long x 140-foot wide Oval Wall Configuration Tank Structure
  • Circular Water-retaining Tank Designs
  • Weir Distribution Structures
  • Reinforced Concrete QA/QC
  • Municipal Building Designs (brick/block/reinforced concrete)
  • Winter Concrete Placement
  • Structural Access Platforms

Project Description

Structural-WW3The project included planning, design and construction services for the $60 million plant expansion project.  The upgrade and expansion of the GNWPCD wastewater treatment plant included:  construction of a new oxidation ditch; construction of three (3) new final settling tanks, including a new final settling tank influent distribution chamber; upgrade of the influent screening system; upgrade and expansion of the grit removal system to a vortex grit system, including the installation of a new grit removal tank and upgrade of the existing grit handling equipment; upgrade of the existing primary sludge pumping system; chemical storage and feed system to provide for chemically enhanced primary treatment; construction of an RAS/WAS pumping station; construction of a UV disinfection system; abandonment and demolition of the existing trickling filters, final settling tanks, chlorine tanks, hypochlorite storage and feed system, and effluent sand filters.  The GNWPCD also incorporated solids handling system improvements and a new emergency generator system/plant switchgear.

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