A perimeter dike/swale -1 (PDS-1) can be used as a clear water diversion when?

A perimeter dike/swale -1 (PDS-1) serves a specific role in erosion and sediment control. It is designed to manage stormwater runoff and divert clean water around disturbed areas to prevent erosion and sedimentation. The assertion that a PDS-1 is never allowed as a clear water diversion recognizes its primary function is not to be used for that purpose, but rather for sediment control.

This answer reflects the overarching regulatory framework that governs sediment and erosion control practices; specifically, it acknowledges that appropriate measures like PDS-1 are meant for directing and managing runoff rather than being utilized directly for diverting clear water. Using PDS-1 inappropriately could lead to unwanted erosion or accumulation of sediment, thus undermining its intended purpose.

While other options propose specific conditions about drainage areas and slopes, they do not align with established best practices for utilizing PDS-1 effectively. It highlights the importance of understanding the capabilities and limitations of erosion and sediment control structures within the context of development and land management.