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ABOUT GAWBThe Gladstone Area Water Board (GAWB) is a Queensland government-owned Bulk Water Supplier, delivering raw and drinking water to local industries and the Gladstone Regional Council.
Lake Awoonga, the fourth largest water storage in Queensland, is the primary source of water for the Gladstone Region. The Awoonga High Dam, which creates the Lake Awoonga impoundment on the Boyne River, is owned and operated by GAWB.
Water is an essential input into our local industries. GAWB supplies about 101 mega litres of water to Gladstone each day from Lake Awoonga, 70% of which is supplied directly to industry as raw water.
GAWB also owns, operates and maintains the bulk raw and drinking water distribution mains and reservoirs and two drinking water treatment plants. We treat about 35,000,000 litres of drinking water (about 14 Olympic sized swimming pools) each day. We then supply drinking water to the Gladstone Regional Council, who delivers it to residential customers via their reticulation system.
At GAWB, we are committed to ensuring our community has access to clean, safe drinking water that is cost effective and we work closely with our stakeholders to make this happen.
The process GAWB uses to treat water at the Gladstone and Yarwun Water Treatment Plants is similar to many plants around the world. Known as conventional water treatment, it is very effective for removing contaminants to produce safe drinking water. Conventional treatment uses a combination of coagulation, flocculation, sedimentation and filtration to remove particles from the water and disinfection to kill pathogens.
The water treatment process is continuously monitored by our operators and via online instrumentation to ensure it meets the stringent standards set in the Australian Drinking Water Guidelines, a globally recognised standard for safe drinking water.
To make every drop count, water used in the treatment process, such as for filter backwashing, is recovered and returned to the bulk raw water network for industry to use.
WATER TREATMENT
COAGULATION - a coagulant chemical, aluminium sulphate, is rapidly mixed into the water to create collisions between the coagulant and particles in the water to form larger particles
FLOCCULATION - the water is then slowly stirred to allow coagulated particles to grow larger
SEDIMENTATION - as the particles grow larger they become heavy and sink, separating clarified water from sediment
FILTRATION - clarified water is filtered through sand media filters to remove the final particles for a very high quality water
DISINFECTION - chlorine is added to the filtered water to inactivate pathogens
PH CORRECTION - the water is corrected for pH to protect pipelines from corrosion
Process
Raw Water
Clear WaterRecovered Water
START
From Lake Awoonga
UpflowClarifier
Treated Water
Raw Water
Additives
Process Water
Carbon
Coagulant
Flash Mix
Dissolved Air Flotation
Flash Mix
Returned to Raw WaterNetwork
Solids Sent to Sewerage Plant
pH Correction
Pumped to Community Reservoirs for distribution
Filters
OPERATIONAL FLOW CHART
Gladstone Water Treatment Plant
Disinfection
Solids Separation
GLADSTONE AREA WATER BOARDPO Box 466Gladstone Qld 4680
Phone: (07) 4976 3000Fax: (07) 4972 5632Email: [email protected]: www.gawb.qld.gov.au
GAWB provides recreational facilities at Lake Awoonga for the community to enjoy, including boat ramps, picnic areas, barbecues, playgrounds and the well-known Boynedale Bush Camp.
LAKE AWOONGARecreational Areas
As part of our ongoing environmental commitments, the GAWB Fish Hatchery operates a breeding program for Barramundi, Mangrove Jack and Sea Mullet to restock into Lake Awoonga. The success of this programme is monitored to determine growth rates and population estimates, assess general health, dispersal and feeding preferences and patterns.
The hatchery also breeds fingerlings for a range of other stocking groups, farmers and private industry throughout central and south-east Queensland, and is one of the largest breeders of Barramundi fingerlings in the state.
GAWB releases approximately 300,000 Barramundi fingerlings into Lake Awoonga each year.
GLADSTONE FISH Hatchery
