In the construction industry, the term "prevailing wage" is used as a euphemism by union leaders (and followers) for "Davis Bacon Wages". Davis Bacon wage levels are set by the federal government, and are the rates required to be paid on federal government funded construction projects.
For the the Philadelphia area, the Davis Bacon wages do not at all represent what is really the "prevailing" wage. They match the union payscales exactly, and are set based on heavy influence by union lobbyists. This is clear even if you're not familiar with the political process, because the Davis Bacon wages for construction in Philadelphia bear no resemblance to that of other major cities, especially when cost of living is factored in.
For example in Washington DC the Davis Bacon wage rate for carpenters in commercial construction is $34, vs $63 in Philadelphia. In New York City the DB wage rate for carpenters is $78 - however NY has a 74% higher cost of living than us. (DC has a 12% higher cost of living). If you average out laborers, electricians, and carpenters; and factor in costs of living, Davis Bacon rates are 150% higher in Philadelphia than DC (IE 2.5x), and 55% higher here than in NYC.
The construction unions in Philadelphia represent less than 30% of Philadelphia county construction worker residents. (And a very narrow demographic slice). "Prevailing" is a complete misnomer, when unions say prevailing wage, they mean the Davis Bacon rates maintained by their lobbyists.
It is important to note again that Davis Bacon wages only apply to federally funded projects - that includes most University projects, anything funded by the PIDC, etc - but do not apply to privately funded projects like Goldtex.
You can see the government's required Davis Bacon wages here:
Wage Determinations Online
More info on this topic at:
http://www.phillybully.com/
Philly to main line
Today, 03:32 PM in Relocation - Moving to Philadelphia