Pasco County Stormwater

NPDES Drainage System Inventory, Phase 2 of 3

DES is sub-consultant to Florida Design Consultants for professional mapping services to inventory and assess the stormwater infrastructure of Pasco County, Florida. Primary responsibilities of DES staff include:


  • Project scoping and work-flow development
  • Site identification and tracking
  • Field map production
  • As-built drawing retrieval
  • Geodatabase QA/QC
  • Mapped deliverables development
  • Tabular progress summaries
  • Project reporting


Pasco County's NPDES Permit requires the identification, location, and assessment of every stormwater structure that is owned, maintained, or operated by the County. The majority of this work is limited to County-maintained roadways but it also sometimes extends to drainage infrastructure owned or operated by homeowners' associations as well as private entities. There are two major tasks involved in the project:


Field Data Collection. Global Positioning System (GPS) crews locate and input data about all types of stormwater structures using the County’s Enterprise Collection System. Structure data is collected for drainage swales, ditches/channels, drop structures, storm drainage pipes, catch basins, weirs, control structures, ponds and canals, including elevations and other dimensions.


Field Data Importation and Manipulation. Field data is imported into the County’s enterprise Geographic Information System (GIS)  system which includes a four-step, quality control process and is posted to a geographic database.


During the second of three phases, the project identified and mapped more than 9500 stormwater features within Township 26 South, Range 18 East, Sections 19, 22, 23, 26, 27, and 29-35.