Aug 10 (Reuters) - CIMIC Group Ltd CIM.AX :
* CIMIC'S UGL SECURES $200M IN MAINTENANCE CONTRACTS IN MINING SECTOR
* CONTRACTS INCLUDE CIVIL, STRUCTURAL WORK AMONG OTHERS FOR RIO TINTO PLANT IN WESTERN AUSTRALIA
* CONTRACT INCLUDES CONTRACT EXTENSION FOR SCHEDULED MAJOR SHUTDOWN SERVICES AT RIO'S ALUMINA REFINERY