How Communication & Responsibility Gaps Cause Workplace Accidents

“I thought someone told them.”

“The radio wasn’t working.”

“Nobody told us they were still in there.”

“I didn’t know who to warn.”

Statements like these appear in investigation reports and witness interviews after workplace accidents across the country. They are not excuses. They are evidence of situations where safety systems failed—and workers paid the price.

At construction sites and in chemical plants, oil refineries, warehouses, and other industrial workplaces, the difference between a safe shift and a fatal one can come down to whether the right information reached the right person at the right time. When that information doesn’t arrive, workers are exposed to significant hazards.

There are two common threads to consider:

When communication was the only thing standing between a worker and a serious accident. Not a lock. Not a barrier. Not a sensor. Just a message that may or may not have been sent, received, or understood.

When responsibility was unclear. No single person or established standard regarding safety decisions. Workers left operating in spaces where everyone assumed someone else was in control.

When Communication Becomes the Safety System

In some workplaces, communication doesn't just supplement safety. It replaces it.

A lockout device physically prevents a machine from restarting. A radio call asking someone not to restart a machine is a request that depends on:

• The call being made in the first place.
• The radio functioning properly.
• The recipient hearing it, understanding it, and complying with it.

Every link in that chain is a potential point of failure.

Industrial worksites are noisy, physically complex environments. Radios may not work reliably inside metal structures, underground, or in areas with significant electromagnetic interference. Dead zones inside large plants and refineries or warehouses can leave workers unable to send or receive messages for stretches of their shift. Equipment may be old, damaged, or shared among too many workers on a single channel. Batteries may die mid-shift. Some workers may not be issued radios at all.

These are known, predictable limitations of communication equipment in industrial settings. Employers who issue radios as a safety measure are responsible for ensuring those radios actually work in the environments where their workers need them.

On April 5, 2010, a massive coal dust explosion at the Upper Big Branch Mine killed 29 miners and injured 3 others. An independent investigation commissioned by the governor found that miners were frequently placed in hazardous conditions deep in the mine with no communication, no vehicles, and no gas detectors. Workers were sent into isolated sections of the mine without the basic tools to call for help or receive warnings about changing conditions. The investigation concluded that the disaster was entirely preventable and that the mine operator, Massey Energy, had operated its mines in a "profoundly reckless manner." The Mine Safety and Health Administration (MSHA) issued 369 citations and assessed $10.8 million in penalties.

When Communication Fails Between Shifts or Crews

Some of the deadliest industrial disasters in modern history have been traced, at least in part, to communication breakdowns during shift changes.

According to the American Fuel & Petrochemical Manufacturers (AFPM), more than 40% of plant incidents occur during startup, shutdown, and shift handover periods, despite these activities accounting for a small fraction of total operational time. The pattern is consistent: critical information that existed during one shift fails to reach the next, and the incoming crew proceeds without it.

In 2005, the BP Texas City refinery explosion killed 15 workers and injured 180 others during the startup of an isomerization unit. The CSB investigation found that supervisors and operators failed to communicate critical information about the startup procedure during the shift turnover, and that BP did not have a shift turnover communication requirement for its operations staff. The night shift did not report a malfunctioning high-level alarm to the incoming day shift, either verbally or in the shift log. The day shift supervisor arrived more than an hour late and did not receive a handover from the night shift at all.

In 2014, a toxic chemical release at DuPont's La Porte, Texas facility killed four workers after nearly 24,000 pounds of methyl mercaptan escaped inside a manufacturing building. The CSB's final investigation report identified shift communications as one of numerous safety management deficiencies contributing to the incident. For several days leading up to the release, operations personnel across multiple shifts had been troubleshooting blocked piping. The workers who opened the drain valves on the night of the incident believed they were addressing a routine, unrelated pressure problem. They did not realize the pressure buildup was connected to the troubleshooting activities that had been underway across previous shifts.

In 2022, a fatal naphtha release and fire at the BP-Husky Toledo Refinery in Oregon, Ohio, killed two workers who were brothers. The CSB found that more than 3,700 alarms went off in the 12 hours before the incident, overwhelming operators and causing critical delays in response. A cascading series of process upsets had caused liquid naphtha to fill a pressurized vessel that was designed to hold only vapor. Two workers were directed to drain the vessel's contents "as fast as you guys can." The CSB concluded that the workers may not have known the liquid they were releasing was flammable naphtha. They opened the vessel, a vapor cloud formed, and it ignited. The CSB noted that a nearly identical overflow event had occurred at the same refinery in 2019 and was never adequately addressed. Investigators also drew direct parallels to the 2005 BP Texas City disaster.

When No One Is Clearly in Charge

Closely tied to communication failures are situations where no one is clearly in charge. When no single person or entity has the defined responsibility for shutting down equipment, clearing an unsafe area, or coordinating work between crews, confusion and miscommunication are inevitable.

This creates some of the most dangerous conditions on any industrial worksite.

“Multiemployer” sites, where a host employer, general contractor, subcontractors, and staffing agencies may all have workers operating in the same space at the same time, are particularly susceptible. OSHA’s Communication and Coordination for Host Employers, Contractors, and Staffing Agencies guide addresses this specific problem.

It calls on these parties to:

• Establish procedures for exchanging information about hazards.
• Determine who is responsible for each element of a safety program.
• Ensure that all workers on site receive consistent safety information.

Why does this guidance exist in the first place? Because the reality often looks nothing like it. In practice, contractors may arrive at a site with different safety standards, different training, and different expectations. Equipment may be accessible to multiple crews with no single point of control over who can start or stop it. Critical decisions may be pushed downward to individual workers who lack the authority, the training, and the information to make them safely.

Worksites like these are full of people who are all doing their jobs, but no one can say with certainty who is responsible for the safety of the space they are working in. And when something goes wrong, the consequences typically fall on the workers who had the least power to prevent it.

Engineering Controls: Preventing Communication & Responsibility Failures

OSHA’s Hierarchy of Controls identifies and ranks safeguards that protect workers from hazards. When hazards cannot be eliminated (physically removed) or substituted (replaced with something nonhazardous), the next most effective method is engineering controls. This includes measures that “prevent hazards from coming into contact with workers,” such as machine guards, ventilation, guardrails, and lockout devices. These are placed above administrative controls that “change the way work is done” or “give workers more information.”

The reason for this hierarchy is straightforward: engineered systems are inherently more reliable than human-dependent ones. When employers substitute verbal warnings, radio calls, or informal signals for engineered controls, they are choosing the less reliable option.

Such was the case in April 2021 when an explosion at the Yenkin-Majestic resin plant in Columbus, Ohio, killed one worker and injured eight others. The U.S. Chemical Safety Board’s investigation revealed that an operator had added solvent to a kettle while its agitator was inactive, an action that should have been prevented by an interlock device (engineering control), but the company had instead relied on a computer panel indicator (administrative control). The agitator activated, rapidly vaporizing the liquid solvent and causing a pressure release that led to the explosion.

To make matters worse, the explosion triggered gas monitors within the facility but sent an email to an off-site employee. There were no audible alarms to alert workers at the plant itself. Flammable vapors escaped and spread through the facility, and the workers had no warning.

OSHA cited the company for two willful and 33 serious violations and proposed penalties totaling $709,960.

Employers Must Do Better

Every incident described in this article followed a pattern. Information that should have reached a worker did not. Authority that should have been clearly assigned was not. Equipment that should have provided a warning failed to, or never existed in the first place.

The tools to prevent these failures are not theoretical. Lockout devices, physical barriers, alarm systems, atmospheric monitors, documented shift handoff protocols, and clearly defined authority structures all exist. They are proven, available, and in most cases already required by federal safety standards.

When employers choose not to provide them, communication becomes the last line of defense. And when that line fails, it is workers who are left unprotected.