Bore completion - Surprise Creek outstation DLH-218
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Technical Report WRD89069 Viewed at 15:07:59 on 29/07/2010 Page 5 of 16. 1. INTRODUCTION This report provides details of groundwater investigations and drilling on an excision of Calvert Hills Station. This work was undertaken by the Power and water Authority with the aim of constructing one water supply bore for the proposed Surprise Creek Aboriginal Outstation. The population may be in excess of 20 people. The excision lies approximately 3 km upstream of the Surprise Creek crossing of the Borroloola to Queensland Road. This is near to the crossing of Surprise Creek by an old well formed track, and approximately 160 km SE of Borro1oo1a. This area is covered by the 1:100 000 Topographic Map Pungalina, Sheet 6364 (AMG Grid Reference 735200 - 8131200). The site is on an area of elevated plains at a level of about 150 m ASL. Annual rainfall averages between 700 rom and 800 rom and is almost entirely confined to the monsoon period, December to March. Annual average evaporation is about 2600 rom. The preliminary hydrogeological study, interpretation of aerial photographs, hydrochemical and other relevant studies were carried out in the office. This was followed by field reconnaissance in September 1988 during which three sites were selected for possible drilling and access checked. Drilling was undertaken in October and the production bore was pump tested in November 1988. 2. HYDROGEOLOGY Regional geology is covered by the 1:250 000 Geological Series Map, Robinson River (Reference 1). The area lies in the McArthur Basin and is underlain by rocks of Lower Proterozoic age with a veneer of Cainozoic sediments. Local stratigraphy is shown in Table 1. 015:GDWT3
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