The Baltimore District and the National Park Service will begin small-scale geotechnical drilling at Dyke Marsh Wildlife Preserve, the week of Oct. 19. This investigation is in preparation for a proposed interagency project to restore up to 100 acres of freshwater tidal marsh within the 485-acre Dyke Marsh. A 2009 study of Dyke Marsh by the NPS and the U.S. Geological Survey found that this unique ecosystem would be entirely lost by 2035 without restoration efforts. Dyke Marsh is home to more than 300 species of plants and 270 species of birds - including the only known breeding population of marsh wrens in the region.