Hydrax Infrastructure, the pavement that drinks the storm

Field notes

The system is organized as surface, aggregate base, and subgrade: water passes through the concrete, occupies voids between washed stone, then infiltrates or reaches an underdrain. The page’s example uses 4,000 m² of pavement, 90 mm/hr rainfall, and a 300 mm base to calculate 384,000 L of storage and 1 hour 7 minutes before the base fills. Results are labeled indicative and based on a steady-intensity balance.