City of Guelph – Clair-Gordon Sewershed Sanitary Sewer Capacity Assessment

Understanding how to conduct a sanitary sewer capacity assessment effectively can be the difference between a thriving community and one fraught with plumbing woes. This case study focuses on the City of Guelph’s Clair-Gordon sewershed, demonstrating how meticulous planning and innovative solutions can overcome even the most daunting challenges.

Project Description

The City of Guelph collaborated with Civica Infrastructure Inc. to undertake a detailed sanitary sewer capacity analysis for the Clair-Gordon sewershed. This project involved:

• Developing a comprehensive, pipe-by-pipe model calibrated using 2017 flow monitoring data.
• Conducting hydraulic analysis across three development scenarios, addressing both existing and future conditions.
• Collecting and analyzing existing data.
• Establishing dry and wet-weather flow patterns, peaks, and volumes.
• Utilizing hydrologic and hydraulic modelling via InfoWorks ICM.

The model highlighted the hydraulic performance of the sewer system under critical flow conditions. Notably, Civica designed a flow control strategy to accommodate the ultimate build-out scenario. This involved implementing in-line flow control as both an interim and ultimate solution to manage peak flow at specific locations. A conceptual design was also crafted to ensure the strategy’s effectiveness.

Relevance of Experience

Civica’s experience in environmental monitoring played an essential role in the project’s success. Our expertise in wet-weather flow monitoring, data analysis, and reporting allowed us to develop an accurate model. By employing inflow and infiltration inspection, Civica could pinpoint problem areas and devise suitable solutions.

The project also benefited from Civica’s ability to develop alternative solutions and evaluate risk mitigation measures. Our experience with mapping and reporting proved crucial in communicating our findings and solutions to stakeholders involved in the project. Through Civica’s efforts, we were able to create a robust conceptual design that addressed current and future sewer capacity challenges effectively.

Challenges Faced

The Clair-Gordon sewershed project was not without its challenges:

• Gathering accurate and reliable data for the model: Field investigations, alongside additional flow and rainfall monitoring, were necessary to ensure the model’s precision. The task required rigorous quality assurance and control to validate collected data.

• Managing stakeholder expectations and communication: Active and consistent communication among City officials, engineering teams, and other parties was crucial to align project objectives and progress, enabling collaborative problem-solving.

Lessons Learned

Several valuable lessons emerged from the Clair-Gordon sewershed project:

• In-line flow attenuation effectively addresses capacity issues when suitable opportunities are available.
• Accurate model input data requires thorough fieldwork and rigorous QA/QC measures for successful outcomes.
• Consistent, transparent communication with stakeholders is crucial.
• Early engagement with the City of Guelph and involved parties ensured project success.

Choose Civica for Expert Water Management Solutions

The Clair-Gordon Sewershed project showcases the effectiveness of collaboration, innovation, and detailed planning in tackling infrastructure issues. It emphasizes the value of comprehensive sewer inspections and capacity assessments for urban development.

To learn more about advanced hydrologic and hydraulic modelling for optimizing sewer capacity, please contact Civica today.