Lessons Learned from Marmot Dam Removal

Stillwater scientists Dr. Yantao Cui and Dr. Bruce K. Orr, along with John Wooster and Christian Braudrick, authored an article, “Lessons Learned from Sediment Transport Model Predictions and Long-Term Post removal” in the Journal of Hydraulic Engineering. 

Located at RM 30 on the Sandy River near Portland Oregon, the 47-ft tall Marmot Dam was removed in the summer of 2007, allowing the approximately 1 million cubic yards of reservoir deposit to be eroded naturally to the downstream river, which was the largest sediment release of any dam removal projects in the US at the time the dam was removed.  Prior to dam removal, Stillwater Sciences (2000)  (also available in Cui and Wilcox 2008) provided sediment transport modeling services to Portland General Electric (PGE), the owner of Marmot Dam, providing key pieces of information for the stakeholders and regulating agencies to move the project forward.  The newly published paper compares model predictions with field data collected before and after dam removal over a 8 year span (4 years before dam removal and 4 years after dam removal), and summarizes lessons learned over the course of the project.  

Please direct your questions with regard to the project and the publication to Dr. Yantao Cui at yantao@stillwatersci.com.

To learn more and read the full publication, click here: http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29HY.1943-7900.0000894

 Posted July 7, 2014