Green Infrastructure Plan for Prince George's County, Maryland. Green infrastructure is defined as an interconnected network of waterways, wetlands, woodlands, wildlife habitats and other natural areas of countywide significance. The Planning Board adopted the modified plan on March 31, 2005 via Resolution PGCPB No. 05-79, and the County Council approved the plan on June 14, 2005. For the full details of the plan please see the "Preliminary Countywide Green Infrastructure Plan" available from the Prince George's County Planning Department. Updates: 3/3/2010 - Intersected the Regulated and Evaluation Area polygons with the WSSC grid to reduce the size and complexity of each polygon. This was performed to enhance the performance of the ArcGIS web service pgatlas.