Construction worker killed by hydraulic excavator while working in trench. A 26-year-old construction worker was killed while trying to remove a concrete sewer casing in an 8-foot deep trench. He was part of a crew constructing new sanitary sewer lines along a residential street. The victim was standing inside an iron trench box, while a hydraulic excavator was being used to remove the concrete casing around a sewer pipe. The victim was giving hand signals to a co-worker operating the excavator above him because it was impossible for the operator to see the bottom of the trench where the casing was […]