Diamantina Power Station is a combined-cycle gas turbine electricity generation plant located in Mount Isa, Queensland, Australia. The power station was developed by APA Group and AGL Energy Limited with a total project cost of $570 million. Siemens Energy supplied one steam turbine, two gas turbines and two heat-recovery steam generators.

Construction commenced in 2012 and the station started operating in 2014 with an electricity generating capacity of 302 MW when combined with 60 MW generated by the adjacent Leichhardt Power Station. Sun Engineering was engaged to deliver the construction of the power plant.

IPMA was engaged at a later stage in this project and was trusted with the precision fitting of the handover of systems including power distribution, heat recovery and cooling systems. Certification delivery processes had to be devised from scratch, which involved writing all processes from the outset as well as on-site inspection and test plans (ITPs).

The implementation of handover/certification procedures for all M&E systems included all elements of the installation, so each handover ITP had to be system-specific to capture the complicated systems involved in the power station. Each system ITP had to be approved by the client’s specialists (our counterparts), who accepted these systems on behalf of the main contractor. Once this process was implemented, completed inspections of the works as installations were carried out in each section of systems (sub-systems). This was successfully achieved and moved swiftly into T&C phases where these systems were brought into use.

IPMA delivered a successful implementation of certification and handover processes within the designated time frame.