Most bridges are concrete with only a handful of the log and timber stringer type still in service.
In cooperation with the Federal Highway Administration, all above-mentioned structures are monitored and maintained in a safe and functional condition. Generally, road conditions throughout the park are good. On the sections of U.S. 101 within the park boundaries, a mix of commercial, logging truck and visitor traffic exists. Half of that traverses wetlands providing coast access at Ozette. The park has 457 buildings.