The Manilla River is a tributary of the Namoi River

Namoi River

The Namoi River is a major tributary of the Darling River in inland New South Wales, Australia.- Course :The headwaters of the Namoi, including the Macdonald River, the Peel River, the Cockburn River and the Manilla River, rise on the western slopes of the Great Dividing Range on the Northern...

 in northern 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...

, Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. Despite the name, it is officially classified as a stream by the Geographical Names Board of New South Wales.

The Manilla River drains a portion of the hill country on the western side of the New England

New England (Australia)

New England or New England North West is the name given to a generally undefined region about 60 kilometres inland, that includes the Northern Tablelands and the North West Slopes regions in the north of the state of New South Wales, Australia.-History:The region has been occupied by Indigenous...

 highlands and the southern slopes of the Nandewar Range

Nandewar Range

The Nandewar Range is a mountain range east of Narrabri in New South Wales, Australia. John Oxley was the first European to see the range in 1818 as he explored the New South Wales Northern Tablelands....

, including the Barraba district. It flows generally to the south and joins the Namoi River at the town of Manilla

Manilla, New South Wales

Manilla is a small town in New South Wales, Australia, located on Fossickers Way 45 kilometres northwest of the regional city of Tamworth. At the 2006 census, Manilla had a population of 2,081 people. Manilla is famous for its setting as a fishing and paragliding area...

.

Split Rock Dam

Split Rock Dam

Split Rock Dam and Split Rock Reservoir lie between the New South Wales towns of Barraba to the north and Manilla to the south. It is reached by a turnoff from Fossickers Way....

is located on the Manilla River about ten kilometres north of the town of Manilla. The dam is one of the main water storages for flood control and irrigation in the Namoi River Basin.