“We want to have that construction done and traffic shifted back to the south lanes by the end of 2019,” said Ken Moore, Walsh’s site superintendent for the project.
In all, the project will include five new bridges and the excavation of 6.6 million cubic yards of dirt, each cubic yard the size of a refrigerator.
The turnpike expects the beltway to open in mid-2021 when the major connections between the interstate and toll road are finished. But it could take another year to finish final elements for the interchange, including the cloverleaf on Morganza Road.
Excavating beneath an existing highway seems like an engineering and construction challenge. But Mr. Moore said the project is “simple” compared to the five-year project the company recently finished on Interstate 95 in eastern Pennsylvania.