Watershed Cleanup at Great Seneca Extension Stream Valley Germantown.
Great Seneca Extension Stream Valley Cleanup 11036 Grassy Knoll Ter, Germantown, MD, United StatesCleanup around the lake area. Meet at the intersection of Grassy Knoll Terrace and MidCounty Highway. Park in the grassy area at the side of the road. Dress for the outdoors in layers. Long sleeve shirts and pants and hiking boots recommended. Use sun protection and bug spray. SSL hours are provided to eligible students. […]