Construction crews are queuing up to tackle the next phase of the Arizona Landslide stabilization project on U.S. Highway 101, just south of Port Orford, according to a recent news release by the Oregon Department of Transportation (ODOT). Planned work includes installing a sizable vertical shaft to bolster the drainage system and paving the way for long-term roadway stability. Starting as early as next week, Portland-based Condon-Johnson & Associates will be helming this effort, a significant move following a fraught history of landslides closing this critical stretch of road.
The Arizona Landslide area, notorious since the highway's inception in the 1920s, brought about several closures in the decades past, including in 1938, 1954, 1978, and 1993. More so, just over two years ago, in January 2023, a landslide prompted an extensive road closure, troubling the Southern Oregon coastal community that relies heavily on this thoroughfare. The announced upgrade aims to ameliorate these recurring disruptions. During the process, traffic may be affected as drivers should anticipate the presence of workers and construction vehicles around the active zone.
The upcoming construction involves a 20-foot wide, 200-foot deep shaft, estimated to cost an estimated $18.3 million to complete. This structure is set to offer an improved catch basin for the drainage network initially set uphill from the pathway. Oregon Department of Transportation's commitment to averting future landslide interruptions seems unflinching, an assurance to the locals for whom U.S. 101 isn't just a strip of asphalt but a lifeline connecting them with the broader geography of the region.
The challenges the Arizona Landslide region poses have seen several engineering responses over the years. In the 1990s, the Oregon Department of Transportation released a report describing the installation of a series of drains aimed at removing water to decrease the risk of land movement. However, evidence suggests that the drains' effectiveness has waned over time, with the 2023 landslide shearing through the vertical drainage constructed to mitigate such threats.
