Development of VTrans Phosphorus Control Plans for the Lake Champlain Basin
Stone has been working with the Vermont Agency of Transportation (VTrans) to develop and implement a plan for meeting phosphorus reduction targets.
Since late 2016, we've worked with VTrans and VT DEC to develop supporting datasets and an implementation framework for the VTrans Phosphorus Control Plans. This work involves a high level of data management, acquisition, analysis/processing, visualization, and data sharing in informative, actionable, and user-friendly ways.
Beginning in the Missisquoi Bay basin, Stone first defined the “PCP Area,” including roadway miles and non-road impervious areas, using best-available GIS datasets. We identified road segments and VTrans facilities (airports, garages, park-and-rides, etc.) that may produce the greatest reductions in phosphorus loads because of BMP implementation. Stone developed innovative techniques to identify areas of significant hydrologic connectivity, substantial runoff accumulation, and potential localized erosion along state-managed roadways. To validate the results, Stone and VTrans conducted field verification using ArcGIS Online and Collector for ArcGIS.