Croy Engineering provided GPS/GIS/Surveying services to the City of Marietta, which were related to data collection for the City’s stormwater system structures located in the City right-of-way. The City of Marietta encompasses approximately 23.2 square miles and includes 6,000+/- storm structures. The inventory data was determined to be “survey grade” quality and used for modeling at the completion of the inventory process.

Consisting of two phases, Phase I included the inventory of all major storm structures with public rights-of-way, whereas Phase II will include approximately 2,000 off-road storm structures outside of the right-of-way. In addition, mapping of the location of the outfalls within the City limits will be necessary in order to connect them to the system within the City right-of-way included in the Phase I mapping. Feature information for the project included structure ID and type, pipe sizes and material, pipe inverts, photos, and connectivity.

Key components and services for this project include:

  • Use of grid system to work from north to south and east to west, fully covering the City limits
  • Downloading final processed field data into GIS database
  • Implementation of GIS software programs such as ESRI ArcMap 10 and FTP site in order to establish transfer of data for City’s GIS specialist
  • Use of “Survey Grade” Trimble R6 RTK GPS Units, Virtual Reference Station (VRS) broadcast system, and TBC (Trimble Business Center) software
  • Communication with client on monthly basis for progress updates and updated GIS file