In 2013, the District of West Vancouver adopted an Integrated Stormwater Management Plan (ISMP) to address concerns of overland flooding within the watershed area referred to as the Five Creeks, for the benefit of both existing and future neighbourhoods below and above the Upper Levels Highway. The name Five Creeks comes from the fact that the watershed contains Pipe, Westmount, Cave, Turner, and Godman Creeks.
This plan calls for a stormwater pipe to run through the Westmount and Altamont neighbourhoods from north of the Upper Levels Highway down to the Burrard Inlet at the foot of 31st Street.
The new stormwater pipe will address concerns related to flooding and erosion by diverting excess stormwater out of the creeks during extreme weather events, safely conveying the flow into the ocean.
The project entails the construction of a large-diameter stormwater pipe that will run from above the Upper Levels Highway, down to a new outfall at the Burrard inlet. Intake structures installed on the creeks will capture any significant stormwater that will overflow the creek banks and divert the excess flow into the pipe.
Managing storm-level flows within these creeks will reduce the impacts of intense storms in Westmount and Altamont—both present-day levels and anticipated increasing levels of severity due to climate change.
The project's construction will be broken down into sections and completed in phases. In order to reduce the duration of disruption as much as possible, there may be times when multiple crews will be working at different sections of the project. Construction will include the following:
- Water main relocation along 3200 to 3300 block of Westmount Road, Benbow Road between Thompson Place to Westmount Road, Thompson Crescent between Mathers Avenue to Thompson Place, and 3100 to 3200 block of Mathers Avenue.
- Large diameter storm pipe (approximately 1.8 meters to 3.0 meters) installation under 31st Street, Mathers Avenue and Westmount Road, in the Westmount and Altamont Neighbourhoods.
- Stormwater outfall to Burrard Inlet at the foot of 31st street.
- Storm diversion pipe and creek intake structures above the Upper Levels Highway.
Five Creeks Flood Protection Main Leg Drawing
Five Creeks Flood Protection East Leg Drawing