The Rollinsford Grade School is a historic school building at 487 Locust Street in Rollinsford, New Hampshire. Opened in 1937, and still in use as an elementary school, it was the first school building commissioned by the prominent Durham firm Huddleston & Hersey, whose principal, Eric Huddleston, designed many buildings in the University of New Hampshire campus. The grounds of the school are also notable as the burial site of Obo II, considered the father of the American Cocker Spaniel breed of dog. The property was listed on the National Register of Historic Places in 2015.

The Cochecho River or Cocheco River is a tributary of the Piscataqua River, 38.3 miles (61.6 km) long, in the U.S. state of New Hampshire. It rises in northern Strafford County and runs southeastward, through the town of Farmington and the cities of Rochester and Dover, where it provides hydroelectric power. Below the center of Dover, the river is tidal and joins the Salmon Falls River at the Maine border to form the Piscataqua.Cochecho is an Abenaki word believed to mean "rapid foaming water", referring to the river's falls in today's downtown Dover. Settlers adopted the name for the entire river. It is believed that the shift from Cochecho to Cocheco can be traced to a clerical error at the 1827 incorporation of the defunct Cocheco Manufacturing Company. The spelling "Cocheco" was adopted as the official name of the river in a 1911 decision by the United States Board on Geographic Names. The river has also been known as the Dover River.Significant tributaries include the Ela River, the Mad River, and the Isinglass River.

The Salmon Falls River is a tributary of the Piscataqua River in the U.S. states of Maine and New Hampshire. It rises at Great East Lake and flows south-southeast for approximately 38 miles (61 km), forming the border between Maine and New Hampshire.The Salmon Falls River joins the Cochecho River near Dover, New Hampshire to form the Piscataqua River.It provides hydroelectric power at the New Hampshire towns of Milton, North Rochester, Somersworth, and Rollinsford, and in Maine at Berwick and South Berwick. The final three miles of the river, from South Berwick to the Piscataqua, are tidal.Local Abenaki Indians called the river Newichawannock, meaning "river with many falls".External links History of the Newichawannock - Salmon Falls River