Construction equipment and supplies were barged over Tahtsa Lake to the eastern end of the tunnel. Sixteen people died making the tunnel. In 1956 the smelter complex consumed 35% of yearly electric energy in British Columbia.
To construct the tunnel, construction equipment and supplies were transported by barge across Tahtsa Lake to its eastern end. Sadly, sixteen workers lost their lives during the tunnel's construction. In 1956, the smelter complex consumed a significant portion of British Columbia's annual electricity usage.