Drainage Inventory

Identification & Mapping of Municipal Owned/Maintained Structural Stormwater Controls
The Stormwater Services Division continues to develop a GIS-based stormwater infrastructure inventory database. The inventory efforts have included such techniques as digitization of paper-based maps, plans, as-builts, and various GPS-based efforts.

The inventory benefits the city by helping city workers and citizens to locate stormwater conveyances and water quality devices. The stormwater infrastructure inventory is in compliance with the Federal National Pollution Discharge Elimination System (NPDES) regulations and maintenance of stormwater drainage facilities.
The Stormwater Division has strived very hard to ensure that there is accurate information and mapping of the municipal stormwater drainage system for the City of High Point. Maintaining an accurate and updated map of the stormwater drainage system will benefit the City greatly when tracking and locating the source of suspected illicit discharges along with maintenance requirements.

The many elements that make up the City of High Point’s stormwater drainage system may cause minor inaccuracies or gaps to be anticipated due to the overall extensiveness of the project. In addition, stormwater drainage system base maps will be constantly changing as new improvements or developments are constructed. The different mapped elements will be verified during monitoring and maintenance activities in order to maintain a complete and accurate map overall.
Available Information
The City of High Point Currently has the following stormwater-related information in the GIS database:
  • Location of all known municipal storm sewer outfalls, receiving waters, and structural BMPs owned, operated, or maintained by the City;
  • Conveyance systems (type, material, size) leading to outfalls that are 36-inches or larger (or have an equivalent cross-sectional area);
  • Drainage areas and land use for the drainage basins contributing to outfalls that are 36-inches or larger (or have an equivalent cross-sectional area);
  • Locations of new connections to the City’s stormwater drainage system; and
  • Drainage areas within the City that do not discharge to surface water (i.e., closed depressions).