Awoonga Callide Pipeline
In 1998 Callide Power Management, a joint venture between CS Energy and Intergen, commenced the Callide Power Project consisting of two 420 MW coal fired electricity generating units located adjacent to the existing Callide Power Station.
To meet the expansion of generating capacity at Callide Power Station, SunWater was commissioned to upgrade the original Awoonga – Callide Pipeline. SunWater designed, built and financed the augmentation and will operate the pipeline over a 30 year commercial contract.
Construction - 1988
Operations - Ongoing
Callide Power Station
Awoonga Callide Pipeline spans from Awoonga Dam in the South to the Callide Power Station in the North with a total length of 68.5km.
When Callide B Power Station (near Biloela) was commissioned in 1988, a 54km long pipeline was constructed to convey water from Awoonga Dam near Gladstone to an outlet structure on the crest of the Calliope Range from when the water was gravitated to Callide Dam along natural creeks. The power station drew its water supplies, as required, from the dam.
The pipeline which is in three sections was constructed from 700mm outside diameter mild steel cement lined pipe.
The sections included:
- Awoonga – Wooderson (29.56km);
- Wooderson – Bocoolima (20.15km); and
- Bocoolima – Outfall (3.88km)
Water is lifted over 500m to the top of the range with three pump stations in series over the three pipeline sections. The original pipeline system was designed to deliver about 14,900 ML/a.
To meet the new Callide Power Station demands, the original pipeline was upgraded to deliver 27,500 ML/a.
Planning studies identified that the optimum solution involved upgrading the three pumping stations with eight new pump and motor units, duplication of about 33km of pipeline and construction of additional water hammer protection structures.
The duplicate sections of pipeline were designed to be compatible with the existing pipework to ensure interchangeability of fittings and identical swabbing provisions.
In order to provide time to carry out maintenance on the system without interrupting the supply, a design criterion of delivering the full demand while pumping only 83% of the time was adopted. This resulted in a design flow rate of 1,045L/s.
Key project infrastructure includes:
- Capacity of 27,500 ML/annum
- A total length of 68.5km
- Operations and maintenance services cover the pipeline, including the Stag Creek Pipeline, and three major pump stations
Design, Construct, Operate, Maintain