Construction on Fern Hollow Bridge, which collapsed on Jan. 28, could begin by late April.

A 100-ton hydraulic drill rig tipped over onto the street at the site of the Chicago Transit Authority's $2.1-billion Red/Purple line project. No injuries were reported and the cause of the incident is being investigated.

The south side of a 100-year-old bridge in Tempe collapsed after a train derailment the morning of July 29.

Dam owners, state and local authorities must do a better job of understanding the history of the dams in their inventory as well as preparing for ice runs that could destroy dams like Nebraska's Spencer Dam, which collapsed under the weight of heavy rain combined with cold temperatures and frozen ground last spring.