Managing Washington State's Growth

The Washington State Department of Transportation (WSDOT) is developing new roads to improve access for residents who live near I-5 in the fast-growing zone along the Washington-Oregon border. As Associated Construction Publications (ACP) reports, the region is transitioning from rural to suburban infrastructures, populations and traffic volumes. But developers and officials want to keep the wilder appearance of the area, so they are using interesting drainage technologies for site runoff. Holding ponds release across geogrid slopes with tree branch cover. As the water flows through, it interacts with the brush as in a wetland. Eventually, it reaches a creek.