Côté Gold Project

The Côté Gold Project is located approximately 130 km southwest of Timmins and 200 km northwest of Sudbury, ON. Early construction of the open pit gold mine commenced in October 2020, with production started in 2024.

Tailings Management Facility & Surface Mining Preparation (2020-2023)

Commenced: 2020
Completed: 2023
Client: IAMGOLD Corporation

In October 2020, North American Nuna Joint Venture (NAN JV), a partnership between Nuna Logistics and North American Construction Group, was awarded the Côté Gold TMF Earthworks, WRC Dams, MRA, Water Management, and Pre-Stripping contract, initially estimated at $250 million. Continued development of the scope and additional projects saw the contract value approximately double over the life of the project. NAN JV’s scope of work included dam construction, watercourse diversion channels, road building, aggregate crushing, and pre-strip activities for the ultimate open pit. The project mobilized a diverse fleet of equipment in November 2020, including 45-ton articulated trucks, 40-ton excavators, 150-ton haul trucks, and a 250-ton shovel. The project employed a workforce that peaked at 370 on-site in Q4 of 2022, consisting of a mix of direct NAN JV employees and subcontractors. Over three years, construction and mining were completed with 2.8 million personnel hours, and there were zero recordable injuries. NAN JV achieved substantial completion in the summer of 2023.

NAN JV’s work scope included:

  • Overburden stripping, pioneering, and mining of the open pit reaching a depth of 50 m; 8 benches.
  • Construction of 3 water management dams and spillway structures within the open pit for water storage and diversion.
  • 240 m of 24” HDPE pipe fused for pit dewatering to ultimate mine water pond.
  • 3 million m3 of overburden removal; 4.6 million m3 in the open pit area, with the remainder from site infrastructure.
  • 9 million m3 of rock excavation; 5.0 million m3 in the open pit and the remainder from site infrastructure.
  • 421,000 m3 of ore excavation.
  • 6 million m3 of in-pit drill and blast and 900,000 m3 of construction drill and blast.
  • Production of 1.0 million m3 of processed aggregate on site; 63,000 m3 stockpiled for Client use and the remainder for use in infrastructure construction.
  • 9 million m3 of rock fill for infrastructure construction.
  • Installation of 51,096 m2 of geotextile and geomembrane.
  • Production of 932 linear meters of concrete for plinth construction and foundation preparation.
  • Construction of 4 major waterway and road crossings, including mechanically stabilized earth wall installations.
  • Approximately 1,500 m corrugated steel pipe installed.
  • Construction of 5.5 km of mine haul roads for 250t haul truck traffic connecting the open pit mine to the tailings management facility, mine rock area, overburden dump, and ore stockpile pads.
  • Construction and upgrades of over 13 km of service roads connecting mining infrastructure.
  • Tailings Management Facility (TMF) construction, including East Starter Dam, East Seepage Collection Dam, and 3 small dams and dykes within the TMF footprint for water management and diversion during construction. A seepage pond and ditch diversions surrounding the TMF were also constructed.
  • Overburden stockpile water management construction, including ditching, dams, ponds, and spillways.
  • Construction of 5 watercourse realignment dam structures around the open pit area.
  • Polishing pond dam construction with steel sheet pile wall installation.
  • Partial construction of crusher plateau with approximately 500,000 m3 of rockfill.
  • Construction of the medium-grade ore stockpile pad, consisting of approximately 575,000 m3 of drill and blast and construction and lining of perimeter ditching
  • Major construction dewatering efforts and fish salvage dewatering throughout the Project, with 34 million m3 of water pumped over three years.
  • Installation of shallow underground utilities within the active plant site construction including firewater, potable water, wastewater, propane, high and medium voltage cable, and communications.