(DC) (Anacostia Watershed Society) Join AWS for a Freshwater Mussel Restoration Workday! We will focus on moving Eastern Elliptio mussels into the bottom cages in Heritage Marsh. In 2015, we started surveying the native species of freshwater mussels in the Anacostia River to understand their diversity and abundance. Volunteers are critical to keep this project going and to meet our goal of enhancing mussel populations to increase their water filtration capacity to help clean our river.