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The stage curve is a graphical representation of the total tailings impoundment, its basin geometry, the quantity of tailings to be deposited, and the rate construction of the various points of the impoundment. The standard curve is plotted to indicate the relationship between the elevation of the top surface, impoundment capacity, the year of operation, and the rate at which the elevation of the tailings rises. The stage curves may also be represented by the appropriate equations, and used to formulate an impoundment mass balance model., The stage curve is a graphical representation of the total tailings impoundment, its basin geometry, the quantity of tailings to be deposited, and the rate construction of the various points of the impoundment. The standard curve is plotted to indicate the relationship between the elevation of the top surface, impoundment capacity, the year of operation, and the rate at which the elevation of the tailings rises. The stage curves may also be represented by the appropriate equations, and used to formulate an impoundment mass balance model.

Of the 24 piles, 11 have or are being relocated to better sites out of flood plains or away from population centres. In the dry parts of the country the piles are covered with a layer of low permeability silt and clay which doubles as an infiltration barrier to prevent seepage to the tailings and the escape of radon gas. Over the clay layer is placed a layer of sand and this is covered with the cobbles of the erosion barrier. Where the climate is more favourable, the infiltration/radon barrier is covered with a biointrusion barrier, and a layer of soil protected from erosion by one or more of the following: gentle slopes, gravel mulch, or vegetation. 4 sites are completed, construction is well advanced at another 7 and 2 more will be started this year., Of the 24 piles, 11 have or are being relocated to better sites out of flood plains or away from population centres. In the dry parts of the country the piles are covered with a layer of low permeability silt and clay which doubles as an infiltration barrier to prevent seepage to the tailings and the escape of radon gas. Over the clay layer is placed a layer of sand and this is covered with the cobbles of the erosion barrier. Where the climate is more favourable, the infiltration/radon barrier is covered with a biointrusion barrier, and a layer of soil protected from erosion by one or more of the following: gentle slopes, gravel mulch, or vegetation. 4 sites are completed, construction is well advanced at another 7 and 2 more will be started this year.

Geotechnical and hydrogeochemical elements of downstream embankments for the impoundment of fine-grained or toxic tailings are discussed with reference to two embankments, Cannon Mine Project and the Greens Creek Project. Such embankments are also used in areas where the environment is wet, seismic or sensitive., Geotechnical and hydrogeochemical elements of downstream embankments for the impoundment of fine-grained or toxic tailings are discussed with reference to two embankments, Cannon Mine Project and the Greens Creek Project. Such embankments are also used in areas where the environment is wet, seismic or sensitive.