Rock Flat Creek

Rock Flat Creek is a watercourse[1] that is part of the Murrumbidgee catchment within the Murray–Darling basin. It is located in the Monaro region of New South Wales, Australia.

Rock Flat
Flat, Tolbar[1]
Rock Flat Creek is located in New South Wales
Rock Flat Creek
Location of the Rock Flat Creek mouth in New South Wales
Location
CountryAustralia
StateNew South Wales
RegionSnowy Mountains (IBRA), Monaro
LGASnowy Monaro
Physical characteristics
SourceAustralian Alps, Great Dividing Range
 • locationbelow One Tree Hill
 • coordinates36°26′5″S 149°13′10″E
 • elevation1,060 m (3,480 ft)
Mouthconfluence with the Cooma Creek
 • location
north of Cooma
 • coordinates
36°7′27″S 149°11′21″E
 • elevation
719 m (2,359 ft)
Length41 km (25 mi)
Basin features
River systemMurrumbidgee catchment,
Murray–Darling basin
[2]

Course and features

The Rock Flat Creek (technically a river[1]) rises below One Tree Hill, on the lower slopes of the Snowy Mountains, part of the Great Dividing Range. The creek flows generally north by west before reaching its confluence with the Cooma Creek just upstream from that creek's confluence to form the Numeralla River (itself a tributary of the Murrumbidgee River), north of the town of Cooma. The creek descends 336 metres (1,102 ft) over its 41-kilometre (25 mi) course.[2]

The Monaro Highway crosses the creek near the locality of Milton Park.[2]

Mineral spring

Near the Monaro Highway crossing,[3] there is a mineral spring that comes to the surface, on the bank of Rock Flat Creek, about 16 km south-east of Cooma. The spring water issues from near the base of a small rocky mount composed of highly inclined beds of quartzite and the surface of the flat in the vicinity of the spring is tufaceous limestone that has been deposited there by the spring water. The flow rate of the spring is about 245-litres per hour. The spring water has a pleasant taste and is carbonated.[4]

An analysis of the spring water, c.1900, in units of grains per imperial gallon, revealed its mineral content as follows[5]

Mineral content of spring at Rock Flat
Chemical compound Grains per

gallon

 Milligrams

per litre

Sodium Chloride 2.51 35.78
Calcium Carbonate 56.08 799.35
Sodium Carbonate 70.50 1004.89
Lithium Carbonate 2.50 35.63
Magnesium Carbonate 24.61 350.78
Silica 1.00 14.25

See also

References
  1. "Rock Flat Creek". Geographical Names Register (GNR) of NSW. Geographical Names Board of New South Wales. Retrieved 4 January 2015.
  2. "Map of Rock Flat Creek, NSW". Bonzle Digital Atlas of Australia. Retrieved 4 January 2015.
  3. Man, Tim the Yowie (9 January 2021). "Region's secret water spring that was 'amongst the world's finest'". The Canberra Times. Retrieved 12 January 2021.
  4. "Mining Industries on the Monaro MINERAL SPRINGS". www.monaropioneers.com. Retrieved 19 February 2019.
  5. "Advertising". North Queensland Register. 10 December 1900. Retrieved 7 February 2022.
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