The first photograph shows the remains of a Worcester County Highway concrete bound from a recent project. The crumbling concrete is maybe due to harsh elements. It is near a lake.
The reinforcing bars that remain are also weathering. It appears that flat bars are used where the front face would have been and #4 bars are at the rear. The arrow points to the remains of the rear bars that are now less than the diameter of a pencil.
Assuming the bars are symmetrical we observed the center with good results. The concrete at the ground level appears solid, but you can see the crumbling concrete pieces in the photograph to the right of this position.
The second photographs was taken at another project for an example of how the bound would look in good condition.
Historic boundaries and conservation efforts.