On this page:
1. Project Updates
2. Staff Reports & Council Decisions
3. Map of Project Area
3. Quarterly Progress Reports
The Thornbury Wastewater Treatment Plant was completed in 1994, with a rated capacity of 3580 m3/day. This project will include the construction/installation of all equipment required for operation of the Extended Aeration treatment system to increase capacity to 5,330 m3/day.
Step 1
- Civil site prep work
Step 2
- Addition of one extended aeration tank, including aeration system, required accessories, and alum addition
- Addition of one clarifier and associated mechanical system
- Increase the current Ultraviolet disinfection system to meet 5,330 m3/day
- Replacement of existing air blowers, including required valves, controls, instrumentation and distribution piping
- Additional 14,000 m3/day mechanical screen and associated hardware to be added
- Incorporate energy efficiency throughout the plant
- Construction of a new outfall pipe to Georgian Bay
Expansion of the plant was approved as part of the 2020 Town Budget. It is anticipated that the detailed design will be completed in Q3 2022. Construction will be completed in two steps to allow for scheduled advancements. The first step is scheduled to be completed in Q3 2022, with the second step beginning immediately afterwards. The project is expected to be completed in Q4 of 2026.
Why Now?
To replace end-of-life equipment and ensure the Thornbury Wastewater Treatment Plant is capable of providing reliable service in line with the forecasted growth of the community.
Project Updates
December 24, 2024
2024 has been an extremely successful year for the Thornbury Wastewater Treatment Plant Expansion. The Town’s contractor has completed construction of the new aeration and secondary clarifier tanks, while also installing new functional components in the pre-existing aeration and clarifier tanks. These additions and new systems will ensure that the plant runs as efficiently as possible for years to come.
In the new year, work will continue on installing the new electrical and plant monitoring systems, along with various pumps and treatment systems. An additional screening system will be installed in the Headworks Building, and the plant’s Ultraviolet Treatment Building will be expanded to handle the increased plant capacity. To ensure that the treated effluent is clean enough prior to being discharged while this expansion is being completed, NAC has installed a standalone temporary UV system.
