Sustainable drainage system (SuDS) with a capacity of around 400 m³ installed in Figueira da Foz. Hidrostation supplied the polypropylene HidroCrate 45T modules and provided on-site engineering support during assembly. The modules sit on a base wrapped in geotextile, with integrated inspection chambers for maintenance. Purpose: to retain rainwater and release it in a controlled way, reducing surface runoff and relieving the drainage network during heavy rainfall events.