Exterior, day, spring; LSs of ice mounds on frozen surface of river, a system used to purify water (0:31). LSs of pulp mill on bank of frozen Saskatchewan River in foreground (0:50). HAS of steam rising from water's surface, TILT UP to LS of open channel on left bank of river, a railroad bridge is visible (0:33). MLS of bridge spanning river, a long passenger train comes into view, crossing bridge (0:43). CUs of water flowing from pipe falling into river (1:30).