Eastern Treatment Plant (ETP) is a wastewater treatment facility. Non-potable water, known as 4W, is generated and used onsite. This layer contains the 4W Effluent pipeline centrelines and associated
The Metropolitan Water, Sewerage and Drainage Board (MWS&DB) contracted the Central Mapping Authority (Department of Lands) to produce aerial photographs of Sydney, Wollongong and the Central Coast. T