In 1986, it became widely known to the public that the USSR was planning to build another hydroelectric power plant on Latvia's largest river Daugava, and that a decision had been made to build a metro in Riga.
Pada tahun 1986, publik mengetahui secara luas bahwa Uni Soviet akan menanam kekuatan hidroelektrik di sungai terbesar di Latvia, Daugava, dan keputusan telah diambil untuk membangun kereta bawah tanah di Riga.