sentences:  Norway and the Soviet Union came to an agreement in 1957 regarding building hydroelectric power stations along Pasvikelva, which ran along the Norway–Soviet Union border.Norway was permitted to build stations at Skoltefoss and Hestefoss, while the Soviet Union was allowed to build at Skoltefoss and Hestefoss, collectively known as the Paatsjoki River Hydroelectric Plants.The agreement insured that each country was permitted to use land in the other country to build the dams.