E.E. Cruz expanded Rahway Valley Sewerage Authority Wastewater Treatment Plant’s sewage capacity from 63MGD to 105 MGD and upgraded and replaced the plant’s outdated systems. All work was performed while maintaining plant operations by utilizing temporary SOE systems which included the installation of sheet piling and soldier piles, steel wales and struts, and tiebacks. The construction consisted of major upgrades to the primary, secondary, and tertiary treatment facilities. Upgrades to these facilities consisted of the construction of a new headworks facility, construction of a new primary settling tank, upgrades to the aeration system, construction of new final settling tanks, construction of a new effluent sand filter facility, construction of a new UV disinfection chamber, construction of a new effluent pump station, and the construction of a new cascade aeration station. In addition, E.E. Cruz was also responsible for constructing a new rotary drum building.

Key project elements include:

• Pumping station construction
• Maintenance of sewer plant operation throughout project
• Mass excavation
• Installation of sheet piles, wales, and struts
• Construction of concrete caissons
• Construction of tie-back temporary walls
• Pile Installation
• Sensitive equipment installation
• Installation of over 110 pumps ranging from 5-700 HP
• Structural steel installation
• Miscellaneous architectural finish work
• Installation of specialty equipment for primary, secondary and tertiary water treatment
• Installation of UV disinfection treatment system
• Implementation of value engineering for owner savings
• Installation of odor control system
• Implementation of plant control and operation system
• Operation of plant and training of owners personnel
• Modifications and retrofitting existing treatment systems
• Installation of elevators