In 2016/17 Hazell Bros was engaged by MMG to upgrade the Rosebery Tailings Dam. Some of the works included:

• 36 hectares of clearing and grubbing
• 100,000m3 of topsoil stripping
• 1,000,000m3 of excavation in rock
• 2,500m3 of cement bentonite into a 600mm wide wall
• Installation of 190,000m2 of flexible bitumen liner

Built in 1971 of earth and rockfill construction, Conglomerate Dam has a storage capacity of 53.1ML. In 2017 Hazell Bros was engaged by TasWater to undertake an upgrade of the dam. Some of the works included:

• Installation of full height buttress filters and rockfill weighting berm
• Demolition of existing & construction of the new high capacity spillway 1:10000
• Raising the impervious level and crest level of the embankment
• Installation of multi-level intake structure with centralised valve operation
• Upgrading dam instrumentation and telemetry
• 25000m3 of imported and placed rock buttress and filter materials