Shellmouth Dam Test Fill

The Shellmouth Dam on the Assiniboine River is a flood control project now being built by the federal and Manitoba governments. The upper 50 ft. of foundation at the dam site is a medium to highly plastic alluvial clay deposit containing sand layers and lenses. This is underlain by up to 100 ft. of sands and gravels to shale bedrock.This paper describes the design, construction, and instrumentation of a test fill built at the site of the proposed dam, and includes summaries of pore pressure and movement observations, settlement studies, and stability analyses.