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was carried out in 1785–86 and accepted by the two states in 1787. The surveying technique that was used at the time was not especially accurate, and as such, this boundary wanders a bit on both sides of the true parallel. The 82nd mile stone was used as the starting point of the
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The survey of the Erie
Triangle boundary in 1789 was by the top surveyor in the United States of the time,
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251:"The Laws Of New York. Article 2: State Boundaries. Section 6: Pennsylvania boundary line"
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The corner point of the Erie
Triangle in modern coordinates is 41°59′55″ N, 79°45′43″ W.
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The distance along the east–west line is approximately 225.86 miles (363.49 km).
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The cornerstone of the Erie
Triangle—the westernmost point in the state of New York
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269:"Act No. 245 of 1887: Boundary Between Pennsylvania and Other States Confirmed"
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The counties that surround the east–west line are known collectively as the
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North along the east boundary of the Erie
Triangle to
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crosses between NY and PA just north of the monument.
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89:at the confluence of the Delaware with the
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109:about 2.8 km downstream from
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273:Pennsylvania General Assembly
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74:Along the center line of the
225:Northern Tier (Pennsylvania)
198:at 41°59′57″ N, 75°21′35″ W
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307:Borders of New York (state)
290:Map of the initial monument
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194:at the northeast corner of
119:West branch of the Delaware
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196:Wayne County, Pennsylvania
186:The starting point of the
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46:meet. In the background,
312:Borders of Pennsylvania
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255:New York State Senate
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128:to the corner of the
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156:in 1786 to separate
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80:Tri-States Monument
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154:Treaty of Hartford
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117:this is the
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124:Across the
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301:Categories
237:References
232:(New York)
213:Twin Tiers
87:New Jersey
40:New Jersey
137:Lake Erie
111:Hale Eddy
78:from the
219:See also
113:; above
101:between
83:tripoint
64:New York
36:New York
34:, where
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