The Watershed Institute
The Watershed Institute, formerly known as the Stony Brook–Millstone Watershed Association, is a New Jersey nonprofit organization devoted to promoting and protecting the watersheds of central New Jersey's Stony Brook and Millstone River, along with associated natural resources and beauty.
History
Claiming to be central New Jersey's first environmental group, it was established in 1949. The organization promotes and advocates conservation and restoration of natural habitats, collects data on environmental conditions in its watersheds, and provides environmental education through numerous programs.The organization is centered on its 950-acre nature reserve in Hopewell Township, Mercer County, near Pennington, which includes portions of Stony Brook, Wargo pond, over ten miles of trails, the seasonal Kate Gorrie Butterfly House, and the LEED-platinum Watershed Center for Environmental Advocacy, Science, and Education.
The Watershed Institute hiking trails are typically open to the public from dawn to dusk, with exceptions occurring during hunting season and days after severe weather events. The trails include the 2.2 mile Stony Brook trail, the 6 mile Watershed trail, the 1.6 mile Farm/History trail, and the 2.5 mile Meadow/Pond trail.
Farmstead
The Andrew and Hannah Drake Farmstead, also known as Drake Farmstead and Brookdale Farm, is a historic district at the reserve. The farmstead was added to the National Register of Historic Places on September 16, 2024, for its significance in architecture and social history. It includes 7 contributing buildings, 2 contributing sites, and 1 contributing structure.The farmhouse was once the home of Dr. Muriel Gardiner Buttinger, a noted author and psychologist, from 1940 until 1965. The oldest part of the farmhouse was built around 1780. The main part was built around 1830 with Greek Revival style by Andrew Drake. The main barn, a gable-roof, timber-frame English barn, was built in phases, one around 1780, and another around 1830. The wellhouse was built around 1880 and features a steel-vaned windmill.
Arboretum
The Stony Brook Millstone Watershed Arboretum is an arboretum maintained by the institute. The arboretum is located at 31 Titus Mill Road, Hopewell Township, in Mercer County, New Jersey and is open daily without charge.The arboretum is located within the association's nature reserve. Its tree collection includes Acer japonicum, Acer saccharinum, Carya spp., Cedrus libani, Fagus grandifolia, Ginkgo biloba, Ilex opaca, Liquidambar styraciflua, Magnolia sp., Metasequoia glyptostroboides, Platanus occidentalis, and Quercus spp..