The Black-Allan Line is the eastern "straight-edge" portion of the border between the Australian states of New South Wales

New South Wales

New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

 and Victoria

Victoria (Australia)

Victoria is the second most populous state in Australia. Geographically the smallest mainland state, Victoria is bordered by New South Wales, South Australia, and Tasmania on Boundary Islet to the north, west and south respectively....

 that stretches north-west from Cape Howe

Cape Howe

Cape Howe is a coastal headland in Australia, forming the south-eastern end of the Black-Allen Line, the border between New South Wales and Victoria.-History:...

 on the Tasman Sea

Tasman Sea

The Tasman Sea is the large body of water between Australia and New Zealand, approximately across. It extends 2,800 km from north to south. It is a south-western segment of the South Pacific Ocean. The sea was named after the Dutch explorer Abel Janszoon Tasman, the first recorded European...

 to Indi Springs, the headwaters of the Murray River

Murray River

The Murray River is Australia's longest river. At in length, the Murray rises in the Australian Alps, draining the western side of Australia's highest mountains and, for most of its length, meanders across Australia's inland plains, forming the border between New South Wales and Victoria as it...

. The Murray then forms the remainder of the boundary between the two states until it reaches the South Australian border.

The line is named for Alexander Black and Alexander Allan, the men who, between 1870 and 1872, surveyed the line that delineated the two colonies.

External links

• Surveying the Black-Allan Line Albert, Nadia. A historical view of the survey of the Black-Allan Line.