This project was the emergency reconstruction of a portion of US Route 30, a key travel artery in suburban Pittsburgh. Subtle slope movement on Route 30 in Allegheny County suddenly became a landslide which sent 300 feet of roadway and thousands of tons of soil plummeting 90 feet down a steep hill, destroying a home and two apartment buildings. Fortunately, no one was hurt.
The project consisted of a 400-foot-long retaining wall and 90-foot embankment. But prior to the construction, a ten-day design effort produced a design utilizing in-stock piling and an around-the-clock work effort.