June 20, 2024
11:00 am – 12:00 pm PT
In response to more frequent flood events, multi-disciplinary design teams at the Federal Highway Administration (FHWA) Western Federal Lands Highway Division are implementing long-term streambank stabilization measures. These measures are intended to preserve the integrity of highway infrastructure while minimizing environmental impacts.
An emerging approach called “engineered log jams” (ELJ), which uses precast concrete dolosse (i.e., pre-cast concrete blocks in a complex geometric shape) is being implemented in the Upper Hoh River Road bank-stabilization project in Olympic National Park, Washington. ELJ with concrete dolosse can be a sustainable approach to protect existing transportation and other infrastructure adjacent to large rivers. Such logjams can baffle or redirect the channel flow and mitigate destructive erosive forces. As an additional benefit, the logs and debris can create or enhance fish habitats.
Learn from the engineers and designers who are using this new technique. For questions contact Karyn Vandervoort, FHWA National Program Manager for Innovation and Research or email CLAS Team..
