ðɪ ˈiːstɚn ˈɛnd ʌv ˌɛsˈɑːɹ twˈɛlv wʌz ɹᵻmˈuːvd fɹʌm mˈæps baɪ nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi, lˈiːvɪŋ ɐ pˈeɪvd ɹˈaʊt fɹʌm lˈeɪk mˈiːd nˈɪɹ ðə sənt. tˈɑːməs sˈaɪt tə jˌuːˈɛs nˈaɪnti wˈʌn.
The eastern end of SR 12 was removed from maps by 1940, leaving a  paved route from Lake Mead (near the St. Thomas site) to US 91.