Greek officials were today celebrating after facilities were given the all clear by the International Olympic Committee's inspection team.
The IOC are now making confident noises about the Games in Athens in three months' time after fears that work would not be finished in time.
Chief inspector Dennis Oswald told reporters in the Greek capital: "We had a lot of yellow or red spots before, indicating some projects were at risk. In construction now, nearly all is green. No single project is at risk. Everything will be delivered on time."
Oswald in particular was delighted that the first arch of the covered roof above the Olympic stadium was successfully erected on Monday with the second in the 55,000 arena expected to be completed very shortly.
There was a great deal of speculation that this might not occur by the May 20th deadline when it was expected the IOC would order the local organising committee to scrap the development.
However, it now appears construction is on track and Greece's Olympic chief, Gianna Angelopoulos, said: "We had promised that Greece was fit for the Games and we are keeping this promise."
The IOC inspection team also praised the security plans which will see NATO forces play a major role in policing the Olympics. Oswald played down last week's bombing outside a police station in the southern suburbs of the Greek capital.
"It was a very local activity. It happens from time to time," he said. "It did not happen in a secured Olympic area."
With almost all of the heavy construction work now complete, a plan is being put into operation to clean up and landscape all of the sporting sites in the Olympic City.