Lerderderg River
The Lerderderg River (known locally as The Lerdy) is a perennial river of the Port Phillip catchment, located in the Western District region of the Australian state of Victoria.
Location and features
The Lerderderg River rises below the Blackwood Ranges, part of the Great Dividing Range, in the Lerderderg State Forest, near the locality of Blackwood. The river flows generally south by east in a highly meandering course, joined by two minor tributaries, before reaching its confluence with the Werribee River within the Melton Reservoir, southeast of Bacchus Marsh. The river descends approximately 383 metres (1,257 ft) over its 40 kilometres (25 mi) course.
A diversion in the river's course, called the Lerderderg River diversion tunnel, located approximately 25 kilometres (16 mi) upriver from Bacchus Marsh, was constructed between 1855 and 1870. The tunnel was driven through a mountain spur in a horseshoe bend, diverting the river, and allowing the exposed river bed to be sluiced for alluvial gold.