WCW26

The Lauderdale neighbourhood in Edmonton ranked as one of the higher priority flood risk neighbourhoods in EPCOR’s SIRP basin ranking system. The neighbourhood is partially separated with some dedicated storm sewers, but also portions of combined sewers with lower level of service that tend to exhibit drainage issues during intense rainfall. Stantec Consulting was retained by EPCOR to implement a flood mitigation dry pond and storm sewer upgrades in the neighbourhood to reduce the flood risk and improve the level of service for the drainage system. Starting as a concept design evaluation, the project continued through to a design phase and now implementation with construction starting in late 2025. Some unique challenges arose during the project including the assessment of a complex drainage network using a 2D hydraulic model, special design considerations for implementing a stormwater management facility in Edmonton’s largest fully fenced off-leash dog park, and a portion of dual-micro tunneling for deep sanitary and storm sewer installation. This presentation will showcase the unique challenges, creative solutions and lessons learned of this complex drainage upgrade in a sensitive area.