20240301 10203100 1.0 TRUE Surface Water Basins: Planning Units Planning Units are derived from the detaild surface water drainage basins (QuadBasin). Planning Units are derived from the detailed basins (QuadBasin) by dissolving on the field PlanningUnit. Date of last update: July 2013. This data set was compiled from a combination of USGS data sets, internal SJRWMD data sets, and SJRWMD staff knowledge.