Deep Soil Mixing at the Jackson Lake Dam

by Christopher R. Ryan, Geo-Con Inc, United States,
Brian H. Jasperse, Geo-Con Inc, United States,

Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices

Discussion: Lundgren Raymond (See full record)
Discussion: Fillmore Wade W. (See full record)
Closure: (See full record)


The Jackson Lake Dam was constructed in 1917 in the Grand Teton National Park near Jackson, Wyoming. The dam was a hydraulic fill placed on a natural alluvium and outwash foundation. The Bureau of Reclamation (Burec) determined that the dam and its foundation would be susceptible to liquefaction and failure during a potential earthquake; a series of contracts was let to remove and replace the dam with a compacted fill and to improve the dam's foundation to depths of up to 110 feet (33 meters). After considering a number of options, the Burec selected deep soil mixing (DSM) as the method to improve the subsoils and to install an upstream cut-off wall. The DSM method appears to have great promise as a method for creating deep foundations, retaining walls, areal soil improvement and even underwater foundations.

Subject Headings: Soil mixing | Underwater foundations | Dam failures | Lakes | Dams | Earthfill dams | Offshore structures | Dam foundations | Wyoming | United States

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