Territory Stories

East Alligator district centre water supply assessment : Kakadu National Park



East Alligator district centre water supply assessment : Kakadu National Park

Other title

D . Pidsley


Jamieson, M.; Pidsley, D.; Paiva, Jerome


E-Publications; E-Books; PublicationNT; Technical Report ; 26/1991




Made available via the Publications (Legal Deposit) Act 2004 (NT).






Water-supply -- Northern Territory -- Kakadu National Park; Groundwater -- Northern Territory -- Kakadu National Park; Kakadu National Park (N.T.)

Publisher name

Power and Water Authority

Place of publication



Technical Report ; 26/1991


1 v. : ill., maps ; 30 cm.

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Check within Publication or with content Publisher.

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Technical Report WRD91026 Viewed at 15:07:48 on 29/07/2010 Page 10 of 107. OOSgJ Bores Add! tional bores are required to meet any increase in demand. A 10% pa growth in demand over 10 years doubles the present water demand to 243 kL/day. The most prospectiv'3 area for new bores to be drilled is along the Bulman Fault Zone, at least 1 km from the present borefield. A second option is to investigate the Koolpin formation. Further geophysics will be necessary to choose the sites for new bores. Some investigative drilling mi3.y also be required. Additional bores capable of sustaining 1.4 Lis continuous pumping will meet this demand. If RN 20559 is recommissioned it could supply 0.5 Lis of water for this purpose (see Section 4.8.1). To site, (!onstruct and equip a new bore 1 km from the present production bores (including providing reticulation and power supply to the site) is estimated to cost $187,000. Storage If the present storage in the system is fully utilised, (ie the 60 kL storage moved) then additional storage will be rElquired peak daily use. in 4 1/2 years time to cater for the The additional storage required in 10 years time is 80 kL. This can be provided in stage,s and should be provided through ground level tanks, which would in turn feed the elevated storages by pumping. This removes the high capital costs required to provide elevated storages. The estimated cost of these works is $31,000. ReticulatiQll In three years time 675 m of 50 mm uPVC needs to be replaced by 100 mm uPVC. In six years time 630 m of 50 mm UPVC, 1875 m of 50 mm uPVC and 722 m of 65 ~m uPVC will need to be replaced by 100 mm uPVC pipe. This is detailed .in section 3.6, and is estimated to cost $231,000.