 Tri-States Monument, 2009 | |
 | |
| 41°21′26″N 74°41′41″W / 41.3573°N 74.6947°W | |
| Location | Tripoint for the states of New Jersey, New York, and Pennsylvania |
|---|---|
| Material | Granite |
The Tri-States Monument (also known as Tri-State Rock) is a granite monument that marks the tripoint of the state boundaries of New Jersey, New York, and Pennsylvania. It is at the northwestern end of the boundary between New Jersey and New York, the northern end of the boundary between New Jersey and Pennsylvania, and the eastern end of the boundary between New York and Pennsylvania. The monument is located at the confluence of the Delaware and Neversink rivers.[1][2][3][4] This location is also known as Carpenter's Point.[5]
The nearby Witness Monument, also known as the Reference Monument or the western State Line Monument, is a taller upright granite monument located south of the Laurel Grove Cemetery in Port Jervis, New York, and under a bridge for Interstate 84. It is not directly on any state boundary, but instead witnesses the location of two points: this tripoint and the corner boundary point between New York and Pennsylvania in the Delaware River.[1]
The Supreme Court of the United States summarized the boundaries of these three states with respect to this monument in New Jersey v. New York, 283 U.S. 336 (1931):[6]
... where it (the Delaware) forms a boundary between New York and Pennsylvania. The Delaware continues its course as such boundary to Tristate Rock, near Port Jervis in New York, at which point Pennsylvania and New York are met by New Jersey. From there the river marks the boundary between Pennsylvania and New Jersey until Pennsylvania stops at the Delaware state line, and from then on the river divides Delaware from New Jersey until it reaches the Atlantic between Cape Henlopen and Cape May.
Also, it is the northernmost point of New Jersey, in Montague Township, Sussex County.[7]
- ^ a b Graff, Bill (Summer 2006). "Sentinels at the Northern Border" (PDF). Unearthing New Jersey. 2 (2). New Jersey Geological Survey: 1–3.
Tri-States Monument ... this small granite slab serves as both the northern end of our boundary with Pennsylvania and the northwestern end with New York.
- ^ "The Laws Of New York. Article 2: State Boundaries. Section 6: Pennsylvania boundary line". New York State Senate.
thence down the center of the Delaware river about eighty-five miles to its junction with the Neversink river; each of the states of New York and Pennsylvania having concurrent jurisdiction within and upon the waters of that portion of the main channel of the Delaware river between the lines of low water at either bank thereof; then S. 51° E. on prolongation of boundary line between New York and New Jersey, to "tri-state monument," set in 1882 by joint commission
- ^ "The Laws Of New York. Article 2: State Boundaries. Section 7: New Jersey boundary line". New York State Senate.
Commencing at the said "tri-state monument," and running thence along the line laid out by a joint commission from the states of New York and New Jersey in 1774, and which was more definitely marked with monuments by another joint commission in 1882,
- ^ "Act No. 245 of 1887: Boundary Between Pennsylvania and Other States Confirmed". Pennsylvania General Assembly. June 6, 1887.
The channel of the Delaware river, from a line drawn across said channel, from a granite monument erected upon the eastern bank of said river in the year one thousand eight hundred and eighty-two, by the joint boundary commission of the States of New Jersey and New York to mark the western extremity of the boundary line between said States of New Jersey and New York, in a westerly prolongation of said boundary line up and along said channel of said Delaware river
- ^ Ruttenber, E. M.; Clark, L. H. (1881). "Tri-States Rock". History of Orange County, New York. Philadelphia: Everts & Peck. p. 739.
- ^ "New Jersey v. New York, 283 U.S. 336 (1931)". Justia.
- ^ Vermeule, C. Clarkson (1888). "Geographical Position". In Cook, George H. (ed.). Final Report of the State Geologist. Vol. 1. Trenton, New Jersey: Geological Survey of New Jersey. p. 39.
The northernmost point of the State is the Tri-States rock, at the forks of the Delaware and Navesink rivers, just south of Port Jervis, New York.