ðə nˈætʃɚɹəl kˈoːɹs ʌvðə tˈiːsnˈɑː pɹˈoʊsiːdz tə lˈeɪk ˈɛmstˈiːnoʊ, wˌɪtʃ ɪz kənˈɛktᵻd wɪððə ɹˈɛzɚvwˌɑːɹ baɪ ɐ kənˈæl, haʊˈɛvɚ, kˈɜːɹəntli ðə vˈɪʃni vˈɑːlətʃɪˌɑːk ɹˈɛzɚvwˌɑːɹ ɹˈɛɡjʊlˌeɪts ðə dɪstʃˈɑːɹdʒ bᵻtwˌiːn ðə dɹˈeɪnɪdʒ bˈeɪsənz ʌvðə vˈɑːlɡə vˈaɪə ðə tˈiːvˈɜːtsə ænd ðə nˈɛvə vˈaɪə ðɪ ˈɛmstˈɑː, wˌɪtʃ flˈoʊz ˌaʊɾəv lˈeɪk ˈɛmstˈiːnoʊ.
The natural course of the Tsna proceeds to Lake Mstino, which is connected with the reservoir by a canal, however, currently the Vyshny Volochyok Reservoir regulates the discharge between the drainage basins of the Volga (via the Tvertsa) and the Neva (via the Msta, which flows out of Lake Mstino).