The cost of building the two tunnels was $65.4 million and involved 250 workers.
Construction began on November 4, 2008 and involved 20,000 workers at the cost of 13 billion.
The renovation project involved 60 different companies and around 600 workers.
The settlements, which involved more than 130 workers, were worth a total of $486,000.
Have you involved workers in thinking about ways to stop the floor becoming slippery?
If the plans succeed, they could involve more than 500,000 workers.
It is expected to take three years to complete and could involve several thousand workers at 17 companies.
Construction work on structure began in July 2010 involving 4,000 workers from 90 companies.
In all, the whole process took about 14 hours, involved at least two dozen medical workers, and cost easily $500,000, Mayo officials said.
The process of registration alone is taking months and involves several thousand workers.