text: Employees 
  
  The Challenger workforce totalled 272 at 
  the end of the financial year comprising 100 
  Kingsgate personnel (employees and casual 
  contractors to fill vacancies); and 172 contrac- 
  tors. Contractors on site include: Leighton with 
  154 personnel providing mining services; 
  Sodexo, 12 personnel providing catering and 
  cleaning services; Powerwest, 2 personnel for 
  power supply services; and AWG, 4 personnel 
  for air leg and rise mining services. 
  〉〉  The Coober Pedy Football Club. 
  
  Turnover for Challenger permanent employees 
  during the financial year was 23%, with 23 
  terminations and 22 new starters. New 
  employees recruited on a casual basis with a 
  view to permanency accounted for 19 positions. 
  
  A supplementary groundwater extraction bore 
  (Gusher 3) was commissioned at Challenger to 
  increase the supply of potable water made 
  available to the accommodation camp. A third 
  reverse osmosis plant was also commissioned to 
  accommodate the increase in volume of water 
  that needs to be filtered for potable use. 
  Challenger is located within the Commonwealth 
  Government, Woomera Prohibitive Area (WPA). 
  The Department of Defence (DOD) continues to 
  utilise the area for rocket testing and other 
  commercial activities. In the last 10 years DOD 
  have not impacted on mine operations. 