Feb 25 (Reuters) - Macmahon Holdings Ltd
* Says notified by BHP Billiton that contract mining operations being undertaken by co at orebody 18 in pilbara region, Western Australia, will be taken in-house
* Says will work closely with BHP Billiton to implement transition to owner-operator;will be completed by 30 June 2014
* Says majority of employees in orebody 18 will be given the opportunity to relocate to other Macmahon projects
* Source text for Eikon
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