The detention basin would consist of a cavity more than 10 metres deep, containing up to about 250000 cubic metres of rainwater, to prevent the River Seveso from flooding when in full flow.
Zadrževalni bazen bi bil več kot 10 metrov globok in vseboval bi približno 250000 kubičnih metrov deževnice, kar bi preprečilo poplavljanje reke Seveso ob polnem vodostaju.