GR Engineering to Build Sulphur Springs Plant as Develop Gives Project Green Light

Why It Matters

The deal secures a critical infrastructure partner for a high‑grade base‑metal project, accelerating Western Australia’s supply of copper, zinc and silver amid rising global demand. It also signals strong investor confidence in Develop’s multi‑commodity growth strategy.

Key Takeaways

• GR Engineering wins A$295m EPC contract for Sulphur Springs plant
• Project will process 1.5 Mt/y of copper, silver, zinc concentrates
• Develop secures funding for Sulphur Springs and Pioneer Dome lithium projects
• Ore reserve estimated at 8.8 Mt with high zinc and copper grades
• Total project capex projected at A$450m (~$315m)

Pulse Analysis

The appointment of GR Engineering as the preferred EPC contractor underscores the firm’s expanding role in Australia’s mining infrastructure market. After successfully delivering the Woodlawn copper‑zinc project, GR brings proven process‑design expertise to Sulphur Springs, a venture that promises to add a 1.5 Mt/y capacity plant for copper‑silver and zinc concentrates. The A$295 million contract not only provides a revenue boost for GR but also reduces execution risk for Develop, which can now focus on securing offtake agreements and optimizing its ore‑processing strategy.

Sulphur Springs sits 144 km southeast of Port Hedland, a logistics hub that offers direct access to export corridors for base metals. An updated DFS released in October 2025 revealed an 8.8 Mt ore reserve with impressive grades—5.4% zinc, 1.1% copper, plus notable silver and gold credits. These figures position the project as a premium source of zinc and copper, commodities that are pivotal for renewable‑energy technologies and electric‑vehicle batteries. The projected A$450 million (≈$315 million) capital spend reflects the scale of the undertaking, encompassing underground mining, processing facilities, and ancillary infrastructure.

From a broader perspective, the green‑light for Sulphur Springs, alongside the Pioneer Dome lithium development, highlights Western Australia’s strategic diversification into both base‑metal and battery‑critical minerals. This dual‑commodity focus aligns with global trends toward decarbonisation, where demand for copper, zinc and lithium is expected to outpace supply. Investors are watching the region closely, as successful execution could set a benchmark for integrated mining projects that combine robust resource bases with efficient, low‑carbon processing solutions. The partnership between Develop and GR Engineering therefore represents a key catalyst for the state’s next wave of mining investment.