Cement Mixer/Pumper Truck

My neighbor is making a new walkway around their house.
A most interesting truck arrived today to deliver the concrete for the job.
It carries the dry concrete components in separate compartments until the operator mixes them together with water for the individual job's requirements.
The wet concrete is then pumped into the form to create the finished walkway.
The operator told me the smallest amount they deliver is half a cubic yard.
I love being a "sidewalk superintendent".  ;-)

-- Ron