Deep Creek (Victoria)

Deep
Creek
Bridge over the Deep Creek at Bulla, built in 1869.
Country	Australia
State	Victoria
Regions	Victorian Midlands (IBRA), Greater Melbourne
Local government area	Macedon Ranges Shire, Hume, Brimbank
Part of	Port Phillip catchment
Tributaries
- left	Boyd Creek, Dry Creek, Garden Hut Creek, Long Gully Creek
- right	Emu Creek, Konagaderra Creek, Monument Creek, Five Mile Creek
Source	Macedon and Cowbaw ranges, Great Dividing Range
- location	near Cobaw
- elevation	517 m (1,696 ft)
- coordinates	37°16′30″S 144°35′58″E / 37.27500°S 144.59944°E / -37.27500; 144.59944
Mouth	confluence with the Jackson Creek to form the Maribyrnong River
- location	west of Melbourne Airport
- elevation	42 m (138 ft)
- coordinates	37°40′10″S 144°48′16″E / 37.66944°S 144.80444°E / -37.66944; 144.80444Coordinates: 37°40′10″S 144°48′16″E / 37.66944°S 144.80444°E / -37.66944; 144.80444
Length	128 km (79.5 mi)
Contour map of the Maribyrnong River basin; Deep Creek is the eastern tributary that rises on the northern slopes of Mount Macedon.

The Deep Creek is a watercourse of the Port Phillip catchment, located in the outer north western suburbs of Melbourne, in the Australian state of Victoria.

Formed by the confluence of a number of smaller streams draining the north eastern slopes of the Macedon Ranges and the southern slopes of the Cobaw range, both ranges being constituent parts of the Great Dividing Range, the Deep Creek rises north of Mount Macedon, near Cobaw. The river flows generally east in a broad shallow valley, to the north of Lancefield, before turning generally southwards towards Penmore to enter the deeper, narrower valley that characterises the remainder of the watercourse. The creek then flows east again before resuming its southward course at Darraweit Guim, towards Bulla, joined by several minor tributaries. The Deep Creek reaches its confluence with the Jackson Creek near Bulla and together they form the Maribyrnong River. The deep and relatively narrow valley cut by the creek in its southward course through the surrounding basalt plains is particularly prominent at such localities as Darraweit Guim, Konagaderra and Bulla. The creek descends approximately 475 metres (1,558 ft) over its 128-kilometre (80 mi) course.

Unregulated by major dams or diversions, the water levels in the creek show great seasonal variation. Recently, Deep Creek flowed only seasonally along most of its length, although significant pools and stretches of water remain all year, some of which are local swimming holes.