Gloucester-based Rappahannock Concrete Corp. has opened its seventh plant, this one in Williamsburg. And one of the first jobs out of the satellite plant was the first of its kind for the company, which has been around since 1961.

According to Rappahannock Concrete president Scott Finney, his firm won the bid for pouring pilings and caps for the Dominion Energy power lines that are currently being constructed to run across the James River. Each day, Finney said two to four trucks cycle between the new plant in Williamsburg to a barge that takes them out into the river.

The yearlong project will involve pouring about 4,000 cubic yards of concrete. It also included a challenge of coming up with an exact mixture of concrete that could meet the needs of being poured into the pilings.

Once the trucks get onto the barge, they head to the site to meet another barge with a crane and concrete bucket set up on it. Finney said the cranes swing the bucket to the barge with the concrete trucks o...