The landfill of Cerro Maggiore has represented in the last years one of the most important source for stocking the wastes in the area around Milano.
The landfill, due to the lack of other sites, was overfilled with wastes, piling up to form a hill, 30 m high, presenting slopes at 38° inclination, 35 m long. These slopes, according to the Italian law, had to be waterproofed with 1 m clay and covered with topsoil.
The challenge given by the inclination and the length of such slopes, forced to a careful selection of the geosynthetics, which included drainage geocomposites, GCLs, geogrids and geomats.
Even the construction details and the installation procedures had to be tailored to this specific situation. The paper describes in details the design methods and the installation of the capping package, thus making a reference case history for these challenging projects.
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