Hyden Wastewater Treatment Plant Upgrade

Benang upgraded the wastewater treatment plant serving Hyden and surrounding farmland for Water Corporation, adding 900,000 litres of effluent storage. The work covered earthworks, two new dams, embankment reshaping, and 10,000 square metres of erosion control.

Client: Water Corporation
Sector: Utilities
Services: Water
Location: Hyden, WA
Year: 2023

Challenge
The Hyden treatment plant needed more effluent storage to keep up with the town and surrounding agricultural areas. The upgrade meant building new dams, reshaping embankments, and controlling erosion across a large area, work with real geotechnical and earthworks complexity.
Approach
Benang carried out the investigation, design validation, and earthworks to construct two additional dams, reshaped the embankment, completed the compaction, and installed 10,000 square metres of Miracell erosion control. Ageing MS27 and MS27C mains were replaced in the same programme.
Outcome
The upgrade delivered 900,000 litres of additional effluent storage with zero lost time injuries, zero environmental incidents, and 60 per cent Aboriginal participation, among the highest of any Benang project.