Between August and September 2015, Menard Polska, Menard’s local subsidiary, worked on the fill of both sections of the highway, improving 33,000 sq. meters of soil to a depth of four meters. Rapid Impact Compaction was used for the first time in Poland. It was recommended following a ground survey campaign that revealed highly variable terrain in terms of both the nature and the density of the materials – coal, clay, sandstone, etc. – making it up.
Overall, some 3,500 pillars were implemented to obtain a degree of compaction of 0.6 above the pillars and 0.4 between them.