The Occupational Safety and Health Administration is extending the comment period until March 30 on the proposed revision of its Injury and Illness Recordkeeping rule. The proposed rule, published in the Jan. 29 Federal Register, would restore a column to the OSHA 300 Log to record work-related musculoskeletal injuries. It does not change existing requirements about when employers must record ergonomic injuries.
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.