Wildcat Dam Removal – Tehama and Shasta Counties, CA

The US Bureau of Reclamation’s Wildcat Dam Removal project was part of the Battle Creek Salmon and Steelhead Restoration Project. The restoration project involved the removal of an existing dam and approximately one mile of 30-inch diameter steel pipeline and concrete support structures from within the steeply-sloping Wildcat Canyon. H&K’s scope of services included geotechnical engineering for dam removal, stream diversion and rock fall protection, as well as environmental site characterization and construction quality control services related to contamination from heavy metals and asbestos associated with pipeline coatings and support structures.

Geotechnical Engineering – H&K developed a rock fall mitigation plan to address the potential for hazardous rock fall during demolition and site work, and observed and identified hazardous geologic conditions throughout the project. H&K also performed hydraulic analysis and design for stream diversion during dam removal.

Environmental Site Characterization and Quality Control – Heavy metals and asbestos were identified on the pipeline, railings, walkways, slide gate and pipeline saddles that were to be removed from the project site. H&K developed the planning documents and work plans to address contaminant containment during the removal process, and performed construction quality control to verify the implementation of the containment plan. H&K performed baseline and post-construction characterization of soil, surface water and sediment; developed the statistical protocol used for comparison of pre- and post-removal analytical data, and prepared a clear, concise and informative closure report