Canada. The river was thus included in the district of Kentucky, which was then a part of Virginia. In January 1980, the U.S. Supreme Court ruled in Ohio v. Kentucky that the state line is the low-water mark of the Ohio River's north shore as of Kentucky's admission to the Union in 1792. Because both damming and natural changes have rendered the 1792 shore virtually undetectable in many places, the exact boundary was decided in the 1990s in settlements among the states. The boundary between Delaware and New Jersey north of 39° 30' north latitude is the east bank of the Delaware River. The boundary between Delaware and New Jersey south of a certain point is the west bank of the Delaware River, rather than the thread of the channel. The boundary between Maryland and Virginia is the south bank of the Potomac River. This also applies both to the border between Maryland and West Virginia (from Harper's Ferry to the source of the Potomac near the Fairfax Stone) since the latter was at one point part of Virginia, and to the border between Virginia and Washington, D.C., since the capital was established from a section of Maryland property. The boundary between Alabama and Georgia, south of West Point, Georgia, is the west bank of the Chattahoochee River at the mean water mark. This was established in an 1860 Supreme Court ruling, Alabama v. Georgia. List of river borders Arthur Kill: New Jersey, New York (tidal strait) Big Sandy River: Kentucky, West Virginia Big Sioux River: South Dakota, Iowa Blackwater River: Virginia, North Carolina Bois de Sioux River: South Dakota, Minnesota, North Dakota Brule River: Michigan, Wisconsin Byram River: Connecticut, New York Catawba River: North Carolina, South Carolina Chattahoochee River: Alabama, Florida, Georgia Chattooga River: Georgia, South Carolina Colorado River: Arizona, Nevada, California, Baja California Columbia River: Washington, Oregon Connecticut River: New Hampshire, Vermont Delaware River: New York, Pennsylvania, New Jersey, Delaware Des Moines River: Iowa, Missouri Detroit River: Michigan, Ontario Great Miami River (mouth only): Ohio, Indiana Halls Stream: New Hampshire, Quebec Hudson River (lower part only): New Jersey, New York Kill Van Kull: New Jersey, New York (tidal strait) Menominee River: Michigan, Wisconsin Mississippi River: Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana Missouri River: South Dakota, Nebraska, Iowa, Missouri, Kansas Montreal River: Michigan (Upper Peninsula), Wisconsin Niagara River: New York, Ontario Ohio River: Illinois,