əbˌʌv ðə lˈɑːk, ðə vˌɛɹɪˈeɪʃən ɪn ɹˈɪvɚ lˈɛvəl hˈæzbiːn bᵻtwˌiːn zˈiəɹoʊ.zˈiəɹoʊ ˈeɪt ˈɛm æt ðə lˈɑːk ɡˈeɪt ænd zˈiəɹoʊ.nˈaɪnti nˈaɪn ˈɛm. ðɪs kəmpˈɛɹz fˈeɪvɚɹəbli wɪð vˌɛɹɪˈeɪʃən bᵻlˌoʊ ðə lˈɑːk æt bᵻtwˌiːn tˈuː.sˈɪksti sˈɛvən ˈɛm ænd fˈoːɹ.nˈaɪnti fˈaɪv ˈɛm ɪn dˈɛpθ.
Above the lock, the variation in river level has been between 0.08 m at the lock gate and 0.99 m. This compares favourably with variation below the lock at between 2.67 m and 4.95 m in depth.