Maritana Minerals Limited (ASX:MRT) has disclosed a construction update on its 2.5 million tonne per annum Black Swan Processing Hub (BSPH), located approximately 50 kilometres northeast of Kalgoorlie in Western Australia, including an extension of its early works agreement with GR Engineering Services (GRES) at an additional committed cost of A$19.9 million through to 31 December 2026.

Key Points

  • The early works agreement with GRES, originally announced on 20 July 2026 with committed expenditure of A$31.5 million to 31 October 2026, has been extended to 31 December 2026 at an additional committed cost of A$19.9 million
  • Civitech commenced construction of CIL tank ring-beam foundations in October 2026, completing reinforcement and formwork for the first ring beam and commencing concrete placement
  • Principal demolition of redundant front-end infrastructure was completed during October 2026, with Focus Demolition demobilising by end of month
  • Chris Mardon has been appointed General Manager Operations to lead operational readiness and the transition from project delivery through to commissioning and into operations
  • Mining restart at Boorara is targeted for mid-2027, with first gold targeted in H2 CY2027

Early Works Agreement Extension and Long-Lead Procurement

The early works agreement with GRES has been extended from 31 October 2026 to 31 December 2026 at an additional committed cost of A$19.9 million, maintaining continuity of detailed engineering, long-lead procurement and bulk earthworks while the Engineering, Procurement and Construction (EPC) contract for the process plant is finalised. Long-lead procurement items being progressed include CIL bolted tanks, intertank screens, regeneration kiln, structural and platework packages, concrete and electrical packages including VSDs, MV switchgear, switchrooms, transformers and Motor Control Centres. Orders for the regeneration kiln, electrowinning cells and slurry samplers were progressed during October 2026.

CIL Circuit Construction and Process Plant Refurbishment Progress

Civitech commenced construction of the new CIL tank ring-beam foundations during October 2026, with concrete placement under way and further tank-foundation works and CIL tank erection being prepared as construction fronts become available. Tank strakes are being canned up in the laydown area. The company disclosed that all statutory approvals required for construction of the BSPH process plant are in place. Specialised Reline Services commenced SAG mill liner removal in October using dedicated relining equipment, and a Letter of Award has been issued to Hofmann Engineering for specialist SAG mill refurbishment works. The existing SAG mill was successfully rotated for the first time in approximately 17 years.

Tailings Storage Strategy and Key Operational Appointment

An additional lift of the existing BSPH tailings storage facility TSF4 is about to go out to tender. Once completed, the lift is planned to provide sufficient tailings storage capacity for approximately three years of processing capacity, allowing a new facility to be developed in parallel. PCH Civil is progressing the ROM pad extension and associated access works, including bulk cut-to-fill, rock placement and engineered fill. Chris Mardon, formerly of Mineral Mining Services, Focus Minerals and Mineral Resources, has been appointed General Manager Operations to lead operational readiness and the transition from project delivery through to commissioning and into operations.