Who is Responsible for a Trench Collapse Construction Accident in Illinois?

A trench collapse happens when the walls of an excavation give way and bury the workers inside. Federal OSHA rules require a protective system, such as shoring, a trench box, or sloped walls, for most trenches 5 feet deep or more. When those rules are ignored in Illinois, the contractors responsible may be held accountable. 

Often times the families who come to us after a trench collapse were told the same thing by the employer or the insurance adjuster: the ground gave way, and nobody could have seen it coming. That is rarely the whole story. Federal safety rules spell out exactly what has to be in place before anyone steps into an excavation, so a cave-in almost always leaves behind decisions someone should have made differently.

These accidents are deadly. Trench collapse deaths hit a record in 2022, when 39 workers died nationwide, and while the count fell to 15 in 2023 and 13 in 2024, at least 12 workers had already died in trench collapses by the end of July 2025, according to Equipment World’s review of OSHA and media reports. Here in Illinois, construction accounted for 26 of the state’s 156 fatal work injuries in 2024, based on Bureau of Labor Statistics data.

Once soil is dug out, the walls of a trench are held up by nothing but their own weight and friction, and that balance changes quickly. Rain and groundwater loosen the soil, heavy equipment near the edge adds pressure, and soil that was dug up before, around old utility lines for example, is far weaker than undisturbed ground. 

A worker caught in a cave-in can be buried in seconds, and even a partial collapse can crush the chest or cut off breathing. In recent fatal collapses, the violation OSHA cited most often was a failure to use proper cave-in protection, primarily a trench box, according to Equipment World’s tracking of OSHA records. 

Private employers in Illinois fall under federal OSHA, and the trenching standards are clear. Employers must make sure that: 

• Trenches 5 feet deep or more have a protective system, such as sloping, benching, shoring, or a trench box, unless the trench is cut entirely in stable rock.

• Protective systems for trenches 20 feet deep or more are designed or approved by a registered professional engineer. 

• A competent person inspects the trench and its protective system every day before work starts and again after rain or other changing conditions. 

• A ladder or other safe way out is within 25 feet of every worker in a trench 4 feet deep or more. 

• Excavated soil and equipment are kept at least 2 feet back from the edge. 

Illinois law also requires excavators to contact the state’s utility locating service before digging, so buried lines are marked, and the soil around them isn’t disturbed blindly. 

If someone you love was hurt or killed in a trench collapse construction accident, you don’t have to sort this out alone. Request a free consultation or call Vinkler Law at 630-655-9545. 

An injured worker’s own employer is usually protected from a lawsuit by the Workers’ Compensation Act.

That’s why we make sure to look at every company that had a hand in the work. Depending on the facts, a third-party claim beyond workers’ comp may be brought against: 

• The general contractor that controlled site safety and the schedule 

• The property owner or developer, when it directed how the work was done 

• An engineering firm that designed or approved the protective system 

• A utility company or locator that mismarked buried lines 

• The manufacturer or rental company behind a defective trench box or shoring 

Illinois uses modified comparative fault. An injured person can recover as long as they are found 50% or less at fault, with damages reduced by their share. Defendants often blame the worker, so the investigation has to show who decided to send workers in without protection. 

Evidence disappears fast. Excavations are often backfilled within days, and then the trench can’t be measured or photographed again. Take these steps early: 

1. Get every medical record. Keep copies of emergency, hospital, and follow-up records. 
2. Write down names. Note the employer, the general contractor, and any coworkers who saw the collapse. 
3. Talk with a lawyer before the site changes. An attorney can send preservation letters and request the inspection file. 

Time limits apply. An Illinois injury lawsuit generally must be filed within two years, and a wrongful death claim generally must be filed within two years of the death. Exceptions exist, so don’t wait to ask. 

At Vinkler Law, we prepare every trench collapse case as if it will be tried before a jury. That means obtaining the OSHA file, the competent person’s inspection logs, site photographs, and the contracts that show which company controlled safety. We then bring in excavation safety and engineering experts who can show a jury what should have been done and how that failure caused the harm. 

As a Chicago construction accident lawyer with offices in Chicago and Burr Ridge, Jerry Vinkler has represented seriously injured people and grieving families for more than 30 years.

When you call our office, you speak with an attorney. Consultations are complimentary. Request a free consultation today.

How deep does a trench have to be before OSHA requires protection? 

OSHA requires a protective system for trenches 5 feet deep or more unless the trench is dug entirely in stable rock. For shallower trenches, a competent person must decide whether protection is needed. 

Who investigates a fatal trench collapse? 

For private employers, federal OSHA investigates, and employers must report a work-related death to OSHA within hours. Its findings can become important evidence in a civil case. 

How long do I have to file a trench collapse lawsuit in Illinois? 

Most Illinois personal injury lawsuits must be filed within two years, and wrongful death claims generally within two years of the death. Exceptions apply, so speak with a lawyer early. 

What compensation may be available after a trench collapse? 

An injured worker may seek medical expenses, lost earnings, pain and suffering, emotional distress, and loss of normal life. In a wrongful death case, family members may seek damages for their grief, sorrow, and the loss of their loved one’s companionship.