Six current and former employees of Aggregate Industries, the largest supplier of concrete for Boston’s Big Dig were arrested today on charges of [tag]falsifying records[/tag] to cover up the poor quality of their concrete. The [tag]corruption[/tag] charges include making false statements, mail fraud and conspiracy to defraud the government.

It is alleged that the company recycled concrete that was too old and damaged with excess water. The project received at least 5,000 truckloads of this inferior concrete.

Boston’s Big Dig started in 1991, and it put Interstate 93 beneath downtown, and connected the Massachusetts Turpike to Logan Airport. The project had huge delays and overruns, with costs ballooning from a projected $2.6 billion to an actual $14.6 billion.

The indicted men included general manager Robert Prosperi, dispatch manager Marc Blais, dispatch manager John Farrar, quality control manager Gerard McNally, district operations manager Gregory Stevenson, and dispatch manager Keith Thomas.