The Art of Managing Contracts: Insights from the City of Toronto Ashbridges Bay Treatment Plant Outfall
Publication: Pipelines 2024
ABSTRACT
Toronto Water’s Ashbridges Bay Treatment Plant Outfall (ABTPO) project will be the largest wastewater treatment plant effluent outfall in Canada. This paper discusses contract administration challenges encountered throughout the ABTPO construction phase. Project-specific construction management approaches, issues, and lessons learned are explored, including quality, schedule, risk and claims management, as well as the application of a Dispute Review Board (DRB). Owner and Consultant perspectives discuss how claims were successfully resolved for ABTPO. Contract administration insights for major disputes are presented, including a stuck bucket during shaft secant pile installation, three separate Differing Site Conditions (DSC) events involving unexpected adverse ground conditions with water inflows at greater than 400 lpm during Tunnel Boring Machine (TBM) tunnelling, and off-shore work claims involving riser installation DSC and marine weather conditions (e.g., adverse wind and waves). Lessons learned from successfully resolving these claims are also presented.
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REFERENCES
Solecki, A., Waher, K., Kramer, G., and Kempa-Teper, J. (2022). “TBM Tunnelling Challenges and Managing High Groundwater Inflows on the Ashbridges Bay Treatment Plant Outfall Project.” Tunnelling Association of Canada 2022 Conference, Vancouver, BC.
Waher, K., Ziegler, S., Kramer, G., Hares, A., and Kempa-Teper, J. (2017). “Toronto Ashbridges Bay Treatment Plant Outfall - Special Contract Provisions for Large Tunnelling Projects.” NASTT 2017 No-Dig Show, Washington, DC.
Waher, K., Henderson, G., Gammie, C., Kempa-Teper, J., and Petran, V. (2018). “Riser Pipe and Port Design for the Toronto Ashbridges Bay Treatment Plant Outfall.” Pipelines 2018: Planning and Design, ASCE, Toronto, Ontario, Canada.
Waher, K., Kempa-Teper, J., Rüsch, P., and Solecki, A. (2023). “Riser Pipe Construction for the Ashbridges Bay Treatment Plant Outfall.” ASCE Pipelines Conference 2023, San Antonio, TX.
Information & Authors
Information
Published In
Pipelines 2024
Pages: 503 - 512
History
Published online: Aug 30, 2024
ASCE Technical Topics:
- Bays
- Business management
- Claims
- Coastal engineering
- Coasts, oceans, ports, and waterways engineering
- Construction engineering
- Construction management
- Contracts and subcontracts
- Disaster risk management
- Dispute resolution
- Environmental engineering
- Legal affairs
- Litigation
- Management methods
- Practice and Profession
- Risk management
- Wastewater treatment plants
- Water treatment
Authors
Metrics & Citations
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