Undammed
The main stem of the Delaware is the longest free-flowing (undammed) river east of the Mississippi. Tributary river flows are controlled by upstream reservoirs operated by the City of New York. Under a 1954 Decree signed by the United States Supreme Court, in times of normal precipitation and runoff, the average daily flow at the northernmost river gauge in Montague, New Jersey must be maintained at 1,750 cubic feet per second.
Photo Credit: David B. Soete
Did You Know?
The deepest point on the Delaware River is located at Narrowsburg in the Town of Tusten, where the Big Eddy runs 113 feet deep. Normal riffle areas are 2-8 feet in depth and pools range from 12-20 feet deep.