The project foresees embankment works in the Makiško Polje zone, as the first phase of the metro depot construction, up to an elevation of 74 m above sea level. To facilitate the monitoring of works, the filling and compaction area has been divided into working fields, with an average size of 1,000 m². According to the design, all fields include removal of the surface humus layer with an average thickness of about 60 cm, rolling and compaction of the soil to the required density, and installation of layers of crushed stone material 30/125 mm and 0/31.5 mm.
The location designated for embankment works includes two reinforced concrete stormwater collectors, designed to collect rainwater from the future depot surface and related infrastructure. Due to elevation differences between the bottom levels of Collector 4 and the main channel, a temporary pumping station will be built at the end of Collector 4 to pump stormwater into the main channel.