ðiːz ɹˈɪvɚz hɐvbɪn jˈuːzd æz ɐ tɹænspoːɹtˈeɪʃən kˈɔɹɪdˌoːɹ sˈɪns ðə kˌælɪfˈoːɹniə ɡˈoʊld ɹˈʌʃ ʌvðə wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹɾi z.
These rivers have been used as a transportation corridor since the California Gold Rush of the 1840s.