Basement Waterproofing - Trench Drain at the bottom of the staircase

This Greenwich basement had a bilco door with stairs coming down. We installed a trench drain at the bottom of the staircase which is connected the the rest of the perimeter drainage system. In the event that water ever comes through the bilco door, it would drain into the trench drain at the bottom of the stairs and be pumped out through the perimeter drainage system.