 The western shaft is located in the Brisbane Botanic Gardens, Mount Coot-tha with the station underground.The eastern shaft is located near the ICB, Kelvin Grove, and will partially be built into an existing hill.Two Herrenknecht Double Shield tunnel boring machines (TBMs) bored from the Mt Coot-Tha roundabout, Toowong, toward the Inner City Bypass (ICB), Kelvin Grove.