SCOTT BULEY, HTT&T, High Tech Turf & Trees Area excavated next to raised berm. Drainage installed at low point exiting at road. Gravel laid beneath. Natural rock installed as a walkway patio, and then leveled with additional gravel, with a final layer of additional smaller pervious washed gravel. Drains 100%. Majority of rain drains into ground per Rain Garden specifications, with only unusually excessive rain draining to street.