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Bore completion report. Gan-gan outstation DLH-498 (27583)



Bore completion report. Gan-gan outstation DLH-498 (27583)


Karp, Danuta


E-Publications; ebooks; PublicationNT; E-Books; Report No 88/91




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






Report No 88/91

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Technical Report WRD91088 Viewed at 15:07:08 on 29/07/2010 Page 5 of 12. 1. INTRODUCTION The objective of this work was to investigate the groundwater potential and subsequently construct one production bore to provide a water supply for the Gan-Gan Outstation. The work was carried out in July 1991 by Water Resources on behalf of the Aboriginal Essential Services. Preliminary hydrogeological study, photographs, hydrochemical study and interpretation other relevant of aerial studies of the area have been carried out in the office. Hydrogeological field reconnaissance was completed between 4 and 7 June and four sites for drilling were pegged in the vicinity of the outstation. The Gan-Gan Outstation is situated approximately 140 km south west of Yirrkala, at the AMG co-ordinates 602400 8557300 (Koolatong 1:100 000 sheet 6071). The outstation has an airstrip and is also accessible from Yirrkala by a four-wheel drive track for most of the year. According to information supplied by the Aboriginal Essential Services the present population of Gan-Gan is estimated at 50. The outstation is well established with school, houses and ablution blocks. Gan-Gan has a monsoonal climate with the wet season from December to ~!ay. The mean annual rainfall ranges between 1400 mm to 1600 mm. The mean annual evaporation is about 2400 mm. 2. HYDROGEOLOGY Geologically, the Gan-Gan Outstation is located on the eastern flank of the Middle Proterozoic McArthur Basin. Geology of the area is covered by the geological map Blue Mud Bay/Port GANGAN

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