(Bloomberg) -- President Donald Trump’s plan to boost the economy with millions of jobs rebuilding roads, bridges and ports has a snag, the construction industry says: There aren’t nearly enough skilled workers to fill them.

Companies including AECOM, Skanska USA Inc. and Turner Construction Co. say the industry is hard-pressed to find enough people for current openings, let alone with the expansion Trump envisions with an additional $1 trillion in spending over the next decade. And though its full impact isn’t yet clear, rebuilding efforts from Hurricane Harvey are likely to increase the demand for workers in the coming years.

“I don’t think we could even dream of finding enough people,” said Richard Cavallaro, president and chief executive officer of Skanska USA Civil, said of Trump’s plan to employ millions. “I just don’t think it’s going to happen like that.”