Tamala Park Infiltration Pond & Infill Earthworks

Doolee completed the construction of a new infiltration pond to support the water management system onsite. This included clearing 0.6ha of native vegetation, excavation of new pond and reprofiling of the existing surface and installation of a new fence around the area.

The Infill Earthworks area relates to the area located between two landfill capped areas. Materials are required to be imported from limestone stockpile on site and placed between the two capped areas to reduce the height difference between these areas. By utilising our internal earthmoving equipment hire, we maintained high operational efficiency for the infiltration pond infill and civil works.The scope also included supply and installation of 20,000m² of HDPE liner to further assist with water management. The infill works are a good example of our bulk and detailed earthworks capability across Perth and WA.

• Clearing of vegetation and topsoil and disposal
• Construction of an infiltration pond (12,000m³ of cut material)
• New open drainage including swales and rock protection
• Supply and install of new fencing
• Supply and install of new armco barrier
• Supply and installation of over 20,000m² of HDPE liner

Challenges

• Working within a live landfill
• Working in restricted work areas with live landfill traffic and SIMOPs
• Ensuring all live services (including landfill gas, leachate and compressed air infrastructure) remained operational, with carefully staged work to avoid any impact on operations

Highlights

• Completion ahead of critical path dates
• Successfully maintained all live services and strategically staged work to avoid disruptions, allowing seamless continuation of mine site production throughout the project
• Works completed safely and within budget