The combined 80 foot cage is being lowered while the concrete pump is slowly being raised.
The concrete pump has three rigid arms and a long flexible hose at the end.
The concrete pump is raised vertically as high as it can go.
The initial thin grout - to clean the pump - is dumped beyond the caison.
Now the actual concrete is pumped deep into the caison.
A concrete truck pouring its load into the feed hopper of the pump.
Several concrete trucks lined up waiting to deliver their load. It takes six trucks to totally fill the caison!
