Tanglewilde Project
Over the past several years, Thurston County worked on a $750,000 grant-funded project aimed at reducing the amount of fecal bacteria that enters Woodland Creek from the Tanglewilde community.  

The fecal bacteria is flushed into Woodland Creek from rainwater runoff (also called stormwater) that comes from roads, roofs, driveways, lawns and other non-porous (impervious) surfaces in the Tanglewilde neighborhood. The polluted runoff flows to a low point on Husky Way and is eventually piped to an outfall on Martin Way, which dumps the water directly into Woodland Creek. 

The Clean up Plan

The County installed eight wells near the end of Husky Way in order to closely monitor water while working to clean it up. See groundwater levels on our Water Levels dashboard.  

The County has also repaired more than 50 existing drywells elsewhere the Tanglewilde neighborhood. Combined, these improvements are expected to greatly reduce the volume of polluted stormwater runoff that enters Woodland Creek. 

The original plan was to install 83 drywells and up to 5.5 miles of swales in county right-of-ways, with the goal of infiltrating more stormwater on-site so that less flowed into Woodland Creek. In pursuing the project, however, Thurston County faced significant challenges with existing public utilities and with the already-built environment. As a result, the county decided to take a different approach to increase infiltration. Instead of installing swales, the county installed dry wells. 

Project documents & information