Four workers in Englewood, Colorado were lucky to escape with their lives when a trench they were in collapsed – although one suffered serious injuries.

The Dec. 7, 2017 incident involving employees of Langston Concrete, Inc. has resulted in OSHA citations against the Colorado Springs company for failing to protect its workers from trench collapse hazards. Langston Concrete faces proposed penalties of $90,535.

The incident occurred as the employees were preparing to install a diverter box on an existing storm water pipe. One employee was buried, and suffered a broken hip and femur. Three others were partially covered, but uninjured.

OSHA cited the company for not removing employees from a hazardous work area, and for failing to install cave-in protection.