View of construction workers on top of the concrete bents (reinforced support pillars) while building the Soo Line ore dock on the Chequamegon Bay, in Ashland, Wisconsin, in 1916. In the foreground ar…

Construction workers on the base of the Soo Line ore dock addition. Barge on left has markings that say “W” and “4.” The crane on the right lifted buckets of concrete to build the addition. Wooden pil…

Construction of the Soo Line ore dock in Ashland, Wisconsin in 1916 showing the various barges, cranes and traveling construction towers used in building this massive structure. On the right is a ship…

Construction of circular concrete pockets, the circular front was formed of reinforced concrete to aid in the free run of the ore. On the right is a tugboat and barge with a crane. In the background i…

View of the diamonds and wooden pilings of the Soo Line ore dock addition while it was under construction in 1925 in Ashland, Wisconsin. Visible on the left are a crane and barge. The ore carrier on r…