Infrastructure

    
   

In the earlier development of local municipalities, they were serviced by combined sewers such that wastewater and surface runoff were collected together and discharged directly into to the river. Up to the late 70’s, sewers built to service new lands were conveyed to the edge of the Petitcodiac River for direct discharge.

The construction of the Causeway in 1968 caused gradual silting and narrowing of the riverbed.

With the growing awareness of environmental concerns dealing with wastewater, various studies were completed to find a solution to an ever increasing volume of untreated wastewater entering the River.

In 1983, the Greater Moncton Sewerage Commission was created by an order in Council of the Province of New-Brunswick with the mandate to implement a Collector System and a Treatment Facility.

The initial undertaking was to construct a Collector Sewer System that would intercept all of these direct discharges and convey the wastewater to the Treatment Plant site in Riverview.

The Collector Sewer was constructed by open cut where feasible and by tunneling method along the downtown area, around the traffic circle and across the river. The Collector sewer was constructed as a gravity system and crosses the River before arriving at the Treatment Facility.

In view of the depth, a large 10 story underground Pumping Station was built on the Riverview side and equipped with large pumps to pump all wastewater to the headwork’s of the plant. This station is constructed of reinforced concrete with walls at 1 meter in thickness. Over 9000 cubic meters of special mix concrete was used.

Construction of the treatment facility was carried out in distinct phases starting with the Main Pumping Station in 1989.

Pre-Treatment facilities consisting of Screening and Grit Removal were done between 1990 and 1991.

The initial treatment was designed to be a Chemically Assisted Primary treatment. In anticipation of a more advanced treatment in the future, the clarifiers were built as circular tanks and placed at an elevation that would provide for an easy conversion to secondary clarifiers. A second clarifiers was constructed in 1994 and a third in 2002-2003.

The by-product of wastewater treatment is the production of sludges that once dewatered and treated are called Biosolids. For this purpose, a large building was constructed to house the high speed centrifuges, conveyors and support systems.

An operation’s center was also built in 1994 and houses offices, a control room, staff facilities and a maintenance garage.

 

 

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