ɐdˈɪʃənəl kənstɹˈʌkʃən ænd mˌɑːdɪfɪkˈeɪʃənz tə ðə ɹˈɛzɚvwˌɑːɹ wɜː kˈæɹid ˈaʊt θɹuː ðə wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɪksti z ænd wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɛvənti z.
Additional construction and modifications to the reservoir were carried out through the 1860s and 1870s.