Amec Foster Wheeler Lisgar District Basement Water Infiltration Investigation

Dedicated foundation drain collectors were considered by many to be the gold standard for managing foundation water around homes. Yet after nearly 25 years of no problems, an increasing number of homes in the Lisgar District of Mississauga began to experience flooding. Amec Foster Wheeler Environment & Infrastructure was retained by the City of Mississauga to undertake an engineering study to determine the causes of the basement water infiltration and recommend corrective measures. Amec Foster Wheeler’s Engineers and Hydrologists used innovative monitoring and proof-of- concept testing, along with cutting edge modelling and analysis. It came to a conclusion that the cause was related to the build-up of water in the bedding material of the utility trenches that contain the storm, sanitary and foundation drain collectors.