OSHA inspectors have, on two recent occasions, protected employees from potential injury or death.
On June 7 an inspector in Madison, Wisconsin, observed work being performed in a trench that looked to be unsafe. The inspector immediately warned the foreman that no one should enter the trench. The trench wall collapsed a short time later, as the inspector conducted the opening conference with the employer.
For more information about trenching safety, look here: http://www.osha.gov/SLTC/etools/construction/trenching/mainpage.html.
On April 17 an inspector in Chicago observed employees working on a scaffold that was within two feet of live 120/240 secondary power lines. The inspector immediately asked the foreman to remove the crew until the lines could be de-energized.
For more information about working near power lines, look here: http://www.osha.gov/SLTC/etools/construction/electrical_incidents/powerlines.html.