This section of the OR 38 corridor has high, steep rock slopes with little fallout area between the rock face and the road. This project will evaluate unstable rock slopes and implement the recommended stabilization methods.
The area is vulnerable to rockfalls due to weather and potential seismic events. Rocks frequently fall onto the shoulder and into the road, damaging pavement, creating a safety risk for the public, and potential highway closures.
The rock is relatively weak sandstone, which complicates rock mass reinforcement measures, and suggests that a variety of options should be considered. Rockfall containment using slope mats or pinned mesh may be viable options. Some sections have large rock blocks and masses that will require some measure of excavation and reinforcement.