Deer Island Primary & Secondary Clarifier Rehab

Rehabilitation adn cleaning of Primary and Secondary Clarifiers at the Deer Island Wastewater Treatment Plant serving the greater Boston area. 

Client:   MWRA
Designer:  CDM Smith
Size:  1,200 MGD

Project Features

  • Cleaning and repairs in 48 primary clarifiers and 54 secondary clarifiers.
  • Each clarifier was cleaned, and any necessary concrete, expansion joint and Linabond repaired.
  • Sluice gate repairs in four primary influent channels.
  • The existing longitudinal and cross collector sprockets, chain and flights removed, as well as any worn wear strips and grease lines.
  • Existing shafting leveled and the collector equipment replaced.
  • Replaced nearly 60 miles of stainless steel chain.

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