Crews are working away at the central tunnelled stretch, which includes underground stations at King/Bathurst, Queen/Spadina, Osgoode, Queen, Moss Park, and Corktown. Osgoode Station — connecting passengers with the existing Line 1 station of the same name — is among the stations being formed through underground mining operations, carving away space to accommodate future station platforms. The station works include a pair of excavation shafts at the northeast corner of Queen and University and the southeast corner of Queen and Simcoe. Deep underground between the two excavation shafts flanking the future station, a spacious cavern is growing wider and deeper as crews continue the sequential excavation process. Diagrams of the ongoing excavation show the current cavern size of roughly 11.3 metres high, shown shaded in light green.