ðə pɹəpˈoʊzəl, wˌɪtʃ ɪŋklˈuːdᵻd tˈuː tˈʌnəlz ˌʌndɚ pˈɪəmˌɔnt ænd ɡlˈiːb, wʌz ɐpɹˈuːvd ˌɔn twˈɛnti θɹˈiː noʊvˈɛmbɚ nˈaɪntiːnhˈʌndɹɪd fˈoːɹtiːn, ænd ðə lˈaɪn ˈoʊpənd ˌɔn twˈɛnti θɹˈiː dʒˈænjuːˌɛɹi nˈaɪntiːnhˈʌndɹɪd twˈɛnti tˈuː.
The proposal, which included two tunnels under Pyrmont and Glebe, was approved on 23 November 1914, and the line opened on 23 January 1922.