Aug 20 (Reuters) - Downer EDI Ltd DOW.AX :
* says has been awarded two contracts by BHP Billiton (LONDON:BLT) Mitsubishi Alliance (BMA)
* Says deal is valued at approximately $150 million with an additional one-year option *says second contract is for the provision of blasting services and is valued at approximately $75 million
* says both contracts will commence on a date to be confirmed by BMA
* Source text for Eikon ID:nASX98QH3M
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