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  2. Twelve-Mile Circle - Wikipedia

    en.wikipedia.org/wiki/Twelve-Mile_Circle

    The Twelve-Mile Circle is an approximately circular arc that forms most of the boundary between Delaware and Pennsylvania. It is a combination of different circular arcs that have been feathered together. [1] [2] It is nominally a circle with a variable radius of approximately 12 miles (19 km) centered in the town of New Castle, Delaware. [3]

  3. Pennsylvania Route 41 - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania_Route_41

    Pennsylvania Route 41 (PA 41) is a 22-mile-long (35 km) state highway located in southeastern Pennsylvania, United States.The southern terminus of the route is at the Delaware state line in Kennett Township, where the road continues as Delaware Route 41 (DE 41).

  4. Mason–Dixon line - Wikipedia

    en.wikipedia.org/wiki/Mason–Dixon_line

    The Mason–Dixon line is a demarcation line separating four U.S. states: Pennsylvania, Maryland, Delaware and West Virginia. It was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon as part of the resolution of a border dispute involving Maryland, Pennsylvania, and Delaware in the colonial United States. [1]

  5. Route 491 (Pennsylvania–Delaware) - Wikipedia

    en.wikipedia.org/wiki/Route_491_(Pennsylvania...

    In the state of Delaware, the highway runs for 0.36 mi (0.58 km) as a connector between the Pennsylvania border and DE 92 near Claymont, Delaware. PA 491 runs closely parallel to the Delaware border throughout its route. It intersects PA 261 in the Booths Corner section of Bethel Township. The western portion of PA 491 was first designated as ...

  6. Delaware Route 100 - Wikipedia

    en.wikipedia.org/wiki/Delaware_Route_100

    Delaware Route 100 (DE 100) is a state highway in New Castle County, Delaware. The route runs from DE 4 near Elsmere to the Pennsylvania border near Montchanin, where it continues into Pennsylvania as State Route 3100 (SR 3100, Chadds Ford Road). The road runs through suburban areas of northern New Castle County.

  7. Geography of Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Pennsylvania

    Pennsylvania is bordered on the north and northeast by New York; on the east by New Jersey; on the south by Delaware, Maryland, and West Virginia; on the west by Ohio; and on the northwest by Lake Erie. It has a small border on Lake Erie with Canada. The Delaware, Susquehanna, Monongahela, Allegheny, and Ohio rivers are the state's major rivers.

  8. Delaware Route 7 - Wikipedia

    en.wikipedia.org/wiki/Delaware_Route_7

    Delaware Route 7 (DE 7) is a north–south highway in New Castle County, Delaware that connects U.S. Route 13 (US 13) and DE 72 in Wrangle Hill north to the Pennsylvania border near Hockessin, where the road continues into Pennsylvania as State Route 3013 (SR 3013), intersecting Pennsylvania Route 41 (PA 41) at an interchange.

  9. Delaware Boundary Markers - Wikipedia

    en.wikipedia.org/wiki/Delaware_Boundary_Markers

    The Delaware Boundary Markers historic district is located along the state boundary lines between Delaware and Maryland, and between Delaware and Pennsylvania.The district includes 94 contributing sites along the Mason–Dixon line and includes the Transpeninsular Line, Post Marked West site, Tangent Line, the Arc Corner, and the Twelve-Mile Circle.