The City of Rainier and the Lower Columbia Estuary Partnership recently
completed a project aimed at improving the quality and health of water in the Columbia River.
Both entities partnered on the project, which involved the installation of bioswales at the Rainier
Boat Launch that will capture, treat, and infiltrate stormwater from more than 13,000 square feet
of impervious parking lot surface.
Oils, greases, metals, and other toxic pollutants from vehicles fall onto the parking lot’s
impervious surface and then wash into river when it rains, negatively impacting water quality.
The