After 79 years of service, a new, $21 million neighbor moved in next door and now the historic Albert Gallatin Memorial Bridge will be imploded.

The rusty, retired structure, named after the treasury secretary under President Jefferson, is listed on the National Register of Historic Places and is the second-oldest cantilever-truss bridge in the state.

It remained in use until the Oct. 22 dedication of its successor, but PennDOT rated it "structurally deficient" and considered it one of the most unsafe bridges in Pennsylvania.

The demolition will occur over two days a week apart, starting with the closing of the new bridge from 7 a.m. to noon.

Demtech will be preforming the shot.