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Artificial Island, New Jersey and Delaware, is an American island located along the eastern shore of the Delaware River, mostly in southwestern New Jersey with a tiny portion inside Delaware's boundaries. It is part of both Lower Alloways Creek Township, Salem County, New Jersey and New Castle County, Delaware. The island is separated from mainland New Jersey by Alloway Creek and Hope Creek. It is called "artificial" since portions of the island are composed of land reclaimed from Delaware Bay.
Map of Artificial Island, Lower Alloways Creek, NJ, USA
The island is geographically unusual since it contains one of two tiny exclaves of the state of Delaware, which is created by the Delaware-New Jersey land border crossing the northern tip of the island, an area that is completely cut off from the rest of Delaware across the Delaware River to the west, and has no road connections to it. New Jersey is separated from Delaware by the Delaware River except for these two areas, which has a land border. The only land access to this exclave at the north tip of the island is from New Jersey.
This exclave was created as a result of the Twelve-Mile Circle, which was part of the resolution of the Penn-Calvert Boundary Dispute among the surrounding states of Pennsylvania, Maryland, Delaware, New Jersey, and West Virginia.
The island is located at 39.4756672°N latitude, 75.5360354°W longitude. Salem Nuclear Power Plant and Hope Creek Nuclear Generating Station are located at the southwest end of the island.
The other exclave of Delaware is Finns Point north of Artificial Island, in Pennsville Township to the northwest of Fort Mott State Park, New Jersey.