We delivered hydrology analyses for watersheds along a 200km of the Trans Mountain pipeline corridor with Ledcor Sicim Limited Partnership (LSLP). Our tasks included designing temporary water diversions, analyzing flood risk for creeks in the entire region, generating watershed maps based on topography and digital elevation models (DEMs), statistical analysis on historical flood data based on a limited number of hydrometric stations, and determining regional regression equations to estimate peak floods with various return periods. We supported the project in water related aspects.