The 4 Shaft Project represents a step change for ventilation capacity at Agnico Eagle's Macassa Mine in Kirkland Lake, Ontario. This paper outlines the process design, equipment selection, and experience in procuring new primary ventilation equipment for this project. Equipment includes new 64 MMBtu/hr natural gas direct fired mine air heaters with integrated silencers; twin 600 hp vane axial fresh air fans; and twin 3,000 hp centrifugal primary exhaust fans with demisters and high-performance silencing measures. This paper presents the description of obstacles tackled during the engineering design of the primary mine ventilation equipment, which included space limitations on surface and noise concerns due to proximity to local communities.
