View of construction of the Soo Line ore dock on the Chequamegon Bay in Ashland, Wisconsin in 1916. In the foreground are traveling construction towers or cranes and construction materials. On the lef…

Aerial view looking South of the 900-foot addition to the Soo Line ore dock in Chequamegon Bay, Ashland, Wisconsin, during construction. The construction of the Soo Line ore dock in Ashland, Wisconsin…

The top of the Soo Line ore dock in Chequamegon Bay, Ashland, Wisconsin, showing how the four railroad tracks intersect. Also showing the foreman's shack to right and the lights that enabled ore punch…

View looking over Chequamegon Bay from the Ashland shoreline showing railroad cars, the pulp hoist and on the far right in the distance the Soo Line ore dock.

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…

Railroad tracks atop the Soo Line ore dock in Chequamegon Bay, Ashland, Wisconsin, sometime after completion of construction in 1917. The view facing south shows a major portion of the wooden trestle…

East side view of Soo Line ore dock in Chequamegon Bay, Ashland, Wisconsin, sometime after completion of construction in 1917. On left is the wooden trestle approach followed by the concrete approach…

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…