The second delay came in 1877 after workers had completed the exterior walls.
He added that workers for the company still had not completed an investigation into the cause of the failures.
The workers completed their strike and reported for work Monday, but the manufacturers refused to take them back.
Also, all workers on the line have completed a comprehensive professional training program abroad.
At the end of the 18-month course, he and the other workers will have completed the eighth grade.
He said the workers may have completed the first phase of their task and were in the building to change the equipment.
The workers complete the foundation pit and are happy about the success.
By the end of 1935 about 1,200 workers completed the west and east cofferdams.
All workers in those buildings should complete a 60-day course of prophylaxis.
Recently, the services were moved to an adjacent chapel to allow workers to complete the job.