Opportunities for directing impervious surface runoff to pervious areas are first considered during the site layout stage. Sheet flow should be encouraged from all impervious surfaces draining to pervious areas. In cases of concentrated flow, the flow can be broken up with [[level spreaders]] or flow dissipating riprap. Use the following guidance for the pervious runoff receiving areas: | Opportunities for directing impervious surface runoff to pervious areas are first considered during the site layout stage. Sheet flow should be encouraged from all impervious surfaces draining to pervious areas. In cases of concentrated flow, the flow can be broken up with [[level spreaders]] or flow dissipating riprap. Use the following guidance for the pervious runoff receiving areas: |