Mortlock River

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Name origin: Henry Mortlock Ommanney, a surveyor
Country Australia
State Western Australia
Region Wheatbelt
Part of Avon River
 - location near Belmunging
 - elevation 249 m (817 ft)
 - coordinates 31°51′48″S 117°9′2″E / 31.86333°S 117.15056°E / -31.86333; 117.15056
Mouth Avon River
 - location west of Northam
 - elevation 146 m (479 ft)
 - coordinates 31°38′41″S 116°40′20″E / 31.64472°S 116.67222°E / -31.64472; 116.67222Coordinates: 31°38′41″S 116°40′20″E / 31.64472°S 116.67222°E / -31.64472; 116.67222
Length 81 km (50 mi)
Basin 16,800 km2 (6,487 sq mi)
Discharge for mouth
 - average 17,800,000 m3/s (628,601,068 cu ft/s)

The Mortlock River is a perennial river located in the Wheatbelt region of Western Australia.

Course and features[edit]

The headwaters of the river rise near Belmunging then flow in a northerly direction, crossed by the Goldfields Road and continuing in a north-westerly direction to finally flow parallel to the Northam York Road and crossed by the Great Eastern Highway. The river is joined by three minor tributaries; Mortlock River North, Mortlock River East and Meenaar South Creek. The river discharges into the Avon River, just west of Northam. The Mortlock descends 103 metres (338 ft) over its 81-kilometre (50 mi) course.[1]

The river was named after the surveyor Henry Mortlock Ommanney in the 1830s. Ommanney was the first European to discover the river during an expedition through the area in 1835.[3]

The river is saline and delivers the most salt (approximately 91 tonnes (90 long tons) per year) into the Avon River.

See also[edit]


  1. ^ a b "Map of Mortlock River, WA". Bonzle Digital Atlas of Australia. Retrieved 18 September 2015. 
  2. ^ "Avon River Basin Natural Resource Management Plan" (PDF). 2004. Retrieved 6 March 2009. [dead link]
  3. ^ Western Australian Land Information Authority. "History of river names". Archived from the original on 16 February 2015. Retrieved 1 September 2011.