Project overview
This project implemented stormwater best management practices along SR 14 in Skamania County and SR 141 and 142 in Klickitat County. Paved surfaces do not allow water to penetrate into the ground where it can be naturally filtered and treated before entering streams or underground water supplies. This lack of infiltration results in excess stormwater running off state highway facilities each year. This work targeted stormwater quality retrofits using vegetated filter strips for the purpose of improving highway runoff stormwater quality.
What to expect
This project is complete.
Project map location for stormwater retrofit work happening along SR 14 in Skamania County and SR 141 and 142 in Klickitat County.
In spring 2019, the Washington State Department of Ecology issued WSDOT a Municipal Stormwater Permit (permit) that regulates stormwater runoff from paved surfaces. The permit requires us to implement a Stormwater Management Program comprised of the program requirements listed in the permit.
Statewide, WSDOT oversees more than 7,000 miles of highway. When rest areas, ferry terminal holding lots, and park and ride lots are included, we manage over 40,000 acres of paved surfaces. Paved surfaces do not allow water to penetrate into the ground where it can be naturally filtered and treated before entering streams or underground water supplies. This lack of infiltration results in excess stormwater running off state highway facilities each year.