Teck Resources Ltd. Feb. 14 reported that the Red Dog zinc mine in Northwest Alaska produced 541,900 metric tons (1.19 billion pounds) of zinc and 111,300 metric tons (245.4 million lb) of lead during 2017.

During the fourth quarter, Red Dog produced 141,200 metric tons (331.3 million lb) of zinc, which was 3 percent lower than the same period a year ago. Teck attributes this drop primarily to...