Engineering company Monadelphous Group has bagged a trio of construction and maintenance contracts in Central Queensland.

Monadelphous has been awarded a new three-year contract with Queensland Alumina Limited to continue to provide general mechanical maintenance services at its operations in Gladstone.

The company has also secured a 10-month extension to its contract with BHP Mitsubishi Alliance for provision of dragline shutdown and maintenance services to its operations in the Bowen Basin.

And its fabrication business, SinoStruct, has secured a new four-year agreement to supply wellsite equipment to Origin Energy.

The packaged equipment is used to separate, meter and control coal seam gas for the Australia Pacific LNG operations.

The Queensland work was part of a $200 million raft of new contracts and contract extensions the company outlined today.

Monadelphous has also secured a number of contracts in the iron ore sector in the Pilbara region of Western
Australia, including work with BHP and Rio Tinto, as well as a construction contract with Codelco for work associated with the development of a new underground section of the El Teniente copper mine in Chile.