Projects

This decade-long program transformed a major lake-based drinking-water facility through three successive construction contracts. The challenge was not simply adding capacity: major new infrastructure had to be integrated into an operating plant, much of it constructed below grade and beneath a heavily used public park.

The role developed across the program from process design and multidisciplinary design coordination through full-time construction administration and commissioning, and ultimately project management. The three contracts included major pumping, treatment, power and operational upgrades and provided direct involvement from detailed design through construction, commissioning and handover.

A critical regional pumping station required both additional capacity and extensive state-of-good-repair work. The assignment combined a building and pumping expansion with replacement of aging electrical, instrumentation and control infrastructure while the existing water-supply facility remained operational.

The project required close coordination between process, electrical, controls, structural, mechanical and civil disciplines. Construction sequencing was particularly important because new infrastructure had to be installed alongside existing equipment before systems could be progressively transferred and commissioned.

This greenfield water-storage facility was developed to support long-term growth, system reliability and emergency storage. The centrepiece was a two-cell, 40-million-litre cast-in-place concrete reservoir and associated distribution centre, constructed on a previously prepared fill platform.

Foundation conditions and site development made the project much more than a conventional reservoir design. More than 250 deep caissons were required, alongside major grading, feedermains, site servicing, access roads, drainage, stormwater management and environmental approvals.

Replacing major valves in an operating raw-water pumping station is fundamentally an operational problem as much as a construction problem. Six large pump discharge systems required new isolation and check valves, flow measurement and associated controls, but the plant still had to maintain sufficient raw-water capacity throughout the work.

Construction sequencing therefore became central to the project. Shutdowns had to be coordinated around plant demand, temporary operating configurations and the availability of the remaining pumps, with later phases reworked as operational requirements changed.

This operating water-treatment-plant upgrade brought together two very different rehabilitation needs: renewal of granular activated carbon filtration infrastructure and modernization of the plant’s chemical storage, dosing and ventilation systems.

The work required careful coordination because existing treatment and chemical systems remained in service around the construction. The assignment extended from design and contractor prequalification through tendering, site inspection and full construction administration.

An aging municipal water-supply system required a long-term decision on its raw-water source. The work began with assessment of the existing treatment plant and wells and developed into a new lake-based supply solution, including a raw-water intake and low-lift pumping station.

The assignment moved from system assessment and alternatives evaluation through environmental assessment, public consultation and detailed design. In addition to the intake itself, the project required development of the pumping station and raw-water conveyance needed to connect the new source to the existing treatment system.