AT WORK A DRAINTUBE TM case study Shale Fracking Impoundments Phase 1 – réhabilitée - 2009 During construction of natural water retention basins near Lock Haven, PA, the designer had to deal with 3 specific requirements: - Design an efficient drainage system under a geomembrane to allow for the maximum reduction of pressure related to the height of the water table and thus limit the formation of bubbles under the membrane during

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