Boddington D6 Dam Remediation

Project Overview

Newmont Mining Corporation (NMC) is primarily a gold producer with significant assets and operations in North America, South America, Australia, Indonesia and Africa. Founded in 1921 and publicly traded since 1925, NMC is one of the world’s largest gold producers and is the only gold company included in the S&P 500 Index and Fortune 500. Headquartered near Denver, Colorado, the company has approximately 40,000 employees and Contractors worldwide.

The Newmont Boddington Gold (NBG) is an open-cut mining operation located off Gold Mine Road, Boddington, in the Southwest of Western Australia. The Site is a drive-in-drive-out operation (1 hour and 30 minutes from Perth) with accommodation at the Site camp and in the nearby town of Boddington.

The Boddington D6 Dam Remediation project is approximately 8 km from the Newmont plant. Newmont Boddington Gold (NBG) operates the D6 Dam.

Fast Facts

ClientIluka Resources
LocationEneabba, WA
Year of Completion 2024

Scope of works

Phase 1 – Early Works

This phase involves mobilisation to site and initial activities, and the construction scope included:

Construct a temporary access road along the bottom of the D6 dam
Remove and dispose of the existing D6 Dam Liner
Remove the saturated clay layer beneath the liner
Prepare the foundation of the upstream face of the dam wall
Extend the intake pipe sump
Excavate and prepare the foundation of the cut-off trench
Prepare haul roads in anticipation of material importation during Phase II

Phase 2 – D6 Construction Works

Phase II focused on the remediation of the wall, and the scope included:

Condition, load, haul, place, and compact 14,000m³ of 3B filter layer (gravel material) in the specified areas, including the key trench to a depth of 1m thick, the lower bench to a depth of 500mm thick and the upper bench to a depth of 840mm thick
Place and compact material at the same grade as the existing dam wall batter (1:2:5 ratio) for the lower and upper sections of the wall
Load, haul, place, and compact 37,000m³ of 3A rock armour in the specified areas on the upstream face of the dam wall, including the lower bench with a thickness between 1.5 and 2.0m and the upper bench with a thickness of up to 2m