The presence of an original unfiltered drain and liquefiable embankment and alluvial soils near the toe of 100-year-old Piute Dam in Utah led project owner Piute Reservoir and Irrigation Co. to construct a new deep drain beneath the downstream portion of the dam. The company chose a bio-polymer trench method, which would allow placement of filter/drain materials and drain pipes without incurring the cost of a dewatering program and deep, open excavation.
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