smaller tributaries from the April 2007 nor'easter forced a number of road closures and evacuations of homes in its flood plain in central Orange County. Cleanup There have been several efforts in the late 20th and early 21st centuries to clean up the river. At the turn of the century, a Wallkill River Task Force was formed, with representatives from both Ulster and Orange counties. From the 'Acknowledgements' of the "Wallkill River Watershed Conservation and Management Plan": "A crucial development in the history of Wallkill Watershed protection efforts was the scheduling of a Wallkill River conference in 1998. Held at Orange County Community College and organized by the Orange County Land Trust (OCLT), this conference could be considered the birth of the Wallkill River Task Force (WRTF) – a ‘project’ of the OCLT. While some focus on this Watershed was already occurring amongst government agencies, the WRTF created a non-governmental group that actively sought the volunteer participation of farmers, business people and other ‘ordinary’ citizens, in addition to government and conservation agency employees, to provide for broad-based leadership in protecting the Wallkill River and its watershed lands." One result of that Task Force's work was the drafting of a conservation and management plan. Riverkeeper's water-quality program has been testing samples at many places along the river with the help of citizen-scientists. In late summer 2016, the Wallkill River Watershed Alliance, along with Riverkeeper, documented a potentially toxic large blue-green algae bloom, prompting the two groups to warn that could be harmful to people, dogs or other pets. After the samples were taken from the River, New York's Department of Environmental Conservation confirmed a Harmful Algae bloom with High Levels of Toxins. Riverkeeper responded by calling on government officials to define the causes of the algae. Tributaries The Wallkill has 69 tributaries in New York alone. Thirty are named. Moving downriver (south to north) See also List of crossings of the Wallkill River List of New Jersey rivers List of rivers of New York Thunder River, in the Grand Canyon, which also drains into a creek Kill (body of water) References External links Wallkill River National Wildlife Refuge U.S. Geological Survey: NJ stream gaging stations Wallkill River Art Gallery Drowned Lands of the Wallkill Rivers of New Jersey Rivers of New York (state) Shawangunks Rivers of Ulster County, New York Rivers of Sussex County, New Jersey Rivers of Orange County, New