The Big Dig · GBH News

I Want Justice for What Happened

November 8, 2023·57 min·4 clips
Concrete truck drivers reported leftover loads by CB radio, then topped off old concrete with 60-90 gallons of water so it would pass the slump test — and Big Dig walls were poured with concrete that could never pass the test of time.
A printer was not just a printer. The host begins with the ticket machine, which was tied into the concrete dispenser. That made the paperwork harder to fake than it might sound. Then the old mix arrives. Concrete that had been sitting too long could still show up for the Big Dig under the cover of timing and tickets that made it look acceptable. The slump test is where the scheme gets physical. Picture an upside down beach bucket. Inspectors lift it and watch how far the concrete settles. Old concrete does not slump the way it should. So drivers could pull over, check the load, and add 60 to 90 gallons of water before reaching the job site. The test looked fine. The concrete, as the host dryly notes, might pass inspection but not time. Dan Johnston understood what was going on. The excerpt does not cast him as the lone architect of the fraud, but it puts him close enough to know the routine. Then the papers show up. A superior tells Johnston to get rid of a huge box of documents. Suddenly the story feels heavier than watery concrete and a clever dodge. Johnston says he will take care of it, and the box winds up in the back of his pickup: about a hundred pounds of documents where other drivers can see it. Their suspicion changes the scene. A technical workaround starts to look like evidence sitting in a truck bed. The episode keeps its voice calm. That makes it hit harder. A public project gets compromised through ordinary things: a ticket, a switch, a bucket test, a box of papers.

As heard by us

A concrete fraud story told with patience, precision, and a sharp ear for how the system worked.

The Big Dig turns a concrete fraud story into a clear account of how a major public project can be gamed one truckload at a time. It is strongest when it slows down for the mechanics of the fraud, especially the slump test and the extra water that made old concrete look new, and…

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