The Air Park Lagoon had long held the potential to support more productive fish habitat, particularly for salmonids. However, limited water movement meant the lagoon was often stagnant, leading to high summer water temperatures, low oxygen levels, and poor circulation. These conditions made the lagoon unsuitable for salmon and other species. In contrast, nearby Hollyhock Flats—located across the water along Dyke Road—has consistently been one of the most productive salmon habitats in the estuary.

Building on a 2010 study, which identified that creating a breach between the river and the upper lagoon could significantly improve water flow and fish access, Project Watershed moved the project forward. Subsequent planning work gathered extensive baseline information, including fish, bird, and vegetation data, and assessed sediments for potential contaminants. Hydrodynamic modelling and breach design were completed by Northwest Hydraulics.

The project was implemented as planned, creating a new connection between the river and the lagoon. This breach increased freshwater input, improved circulation and flushing, and significantly enhanced fish access. The results were immediate and encouraging—coho salmon were observed using the restored habitat within days of project completion. 

As part of this initiative, salt marsh islands were constructed at the south end of the lagoon and planted with native salt marsh species. Both phases of the project was a great success, transforming the Air Park Lagoon into a healthier, more productive habitat and strengthening its connection to the surrounding estuary.

Following completion of the project, Project Watershed staff and volunteers have carried out ongoing restoration and maintenance of the vegetation along the airstrip side of the lagoon. This area had been heavily overgrown with invasive plants, primarily blackberry. Volunteers removed invasive species and replanted the area with native vegetation, along with mulching and watering to support successful establishment.

This Project is funded by the Fish and Wildlife Compensation Program on behalf of its program partners BC Hydro, the Province of B.C. and Fisheries and Oceans Canada who work together to conserve and enhance fish and wildlife impacted by the construction of BC Hydro dams. It is also funded by TD Friends of the Environment.