| Abstract: |
The Massachusetts Department of Conservation and Recreation (DCR) is a government agency that owns a vast amount of property throughout Massachusetts including reservoirs, watershed and conservation land, state parks, urban parks, bridges and parkways. DCR properties contain an equally large amount of stormwater infrastructure ranging from open swales in remote areas to highly urbanized stormwater systems. To satisfy the U.S. EPA's National Pollutant Discharge Elimination System (NPDES) permit DCR mapped the stormwater infrastructure on its diverse properties. This presentation describes the development of a comprehensive stormwater geospatial database and a companion GPS data collection system which will help employ best management practices required to comply with the permit. This process included the integration of digitized data from georeferenced construction plans along with the collection of new GPS survey information. Potential applications of the geodatabase include identification and quantification of the stormwater system, illicit discharge detection and elimination, maintenance tracking and management, watershed delineation and analysis, and capital planning. This example of complete stormwater mapping shows an efficient method of utilizing existing and new data to create a dynamic spatial database for use in almost all aspects of stormwater management. |