This is what remains of the beginning of Coleman Blvd.

and the mixture of concrete and rebar is all for recycling

Here you can see the rebar that has been separated from the concrete. Bill Callanan has provided a great description of the separation process:

The concrete is removed from the rebar using concrete pulverizers and 
"Universal Processing" attachments. These tools pulverize the concrete and it 
falls from the steel. Then the steel can be down sized using a shear 
attachment on the excavator or down sized at the scrap yard. Either way the 
down sizing of the steel prepares it for a smelter to be melted down. 
By removing the concrete from the steel it can be recycled rather than 
disposed of at a land fill. The concrete can be recycled as well once the 
steel has been reused.

Looking up the Pearman and Grace on-ramps from Coleman Blvd.