Building a bridge over the Hudson River just north of New York City is obviously no easy task, but a portable batch plant helps. The collection of Tappan Zee Bridge equipment has added a barge-mounted floating concrete production factory. It is built to produce some 300,000 cubic yards of concrete for the new crossing. The new plant is currently producing concrete for the span's pile caps. Fred Nolta, a California-based construction manager and concrete expert, said the portable plant is likely a cost-saver for the project team. "You have a limited amount of time to get it placed where it needs to be. If you have a portable batch plant on site, you minimize that time element." he said.