Sienna Botanica and Basin Maintenance

Sienna Botanica is a 2.9-mile man-made natural biofiltration system that handles urban runoff throughout Ladera Ranch.

  • The system uses plants and engineered drainage design to filter contaminants and sediment from runoff water.
  • The riverine ends at the Horno Creek Water Quality Basin, where naturally filtered water is slowed to remove sediment and receive additional biofiltration.
  • Manual and mechanical removal is the only maintenance method used in these areas.
  • Controlling excessive growth and removing non-native and noxious weeds is an ongoing maintenance responsibility.

Routine maintenance and larger related projects are budgeted to ensure this unique environmental feature is properly maintained.