The Lac Seul First Nation of northern Ontario has won a key round in its long fight to be properly compensated for the flooding of its lands caused by construction of a dam. In an 8-1 ruling Friday, the Supreme Court of Canada set aside a $30-million award and sent the matter back to the Federal Court for reassessment. A hydroelectric dam to supply power to Winnipeg was built in 1929 under an agreement between Canada, Ontario and Manitoba.