By Chris Carlsen, Albuquerque Fire Department

Having worked and been an instructor in the rescue field, I am often asked, “what are some advanced rescue techniques in confined spaces?” My response is always, “It depends where you think you are as a team, because advanced can mean many different things.”

Obviously there are confined space rescue scenarios that require a higher level of proficiency and teamwork than others. However, I like to begin by asking a team to do a self-assessment, as outlined below, and to think of “advanced” confined space rescue as anything that advances the ability of a team to perform as rescuers.

Is your team in the CRAWLING stage, meaning you have a trained team but the only time you touch a piece of equipment or do some rigging is during an annual refresher? Then “advanced” for your team means relearning the fundamentals every year. Practicing anchor rigging, building basic mechanical advantage systems, packaging patients in litters and drag devices, setting up SCBA or SAR systems and understanding the importance of atmospheric monitoring and ventilation strategies. All the basic tools you need to get the job done!

Is your team WALKING, having dedicated team members with solid fundamentals that attend regular training evolutions? Then “advanced” can mean organizing team equipment for a more efficient response, pre-rigging standard set-ups for rapid deployment, practicing compound and/or complex systems, identifying and preplanning confined spaces, defining team roles in an ICS type structure, and conducting full scenarios from response to termination.

Is your team RUNNING, with experienced team members who are looking to be challenged? Advanced for you is getting creative and locating spaces that are difficult to reach, difficult to access, and/or challenging to work in. Teams like this will benefit from having time restraints on training exercises to build pressure and increase the speed with which people work. Other ideas would be to limit the availability of equipment so the team has to problem-solve and prioritize actions, or add new pieces of equipment that provide more efficiency or increase safety.

Every one of the teams I just described is capable of making a successful confined space rescue today. But first, what do we consider a successful confined space rescue? For me, it is performing the rescue while providing for the safety of our team and the persons we are responding to. If we can do that, then we have been successful.

Over and above the basics of a successful rescue, what separates good teams from better ones is their efficiency and ability to solve complex problems. The more complex the rescue scenario is, the less efficient the team is going to be… unless they have experienced the scenario before or can relate it to something they have done. And where can they get experiences needed to build confidence and the mental files they can draw from? Training, training, and oh yeah training! The best teams build a sort of muscle memory that derives from all the exposure to various situations they have experienced. I have a quote scribbled on my wall that says:

“A rescue isn’t successful because of what you did today, it was the years of training that led up to the rescue that made the difference.”

I’m not sure who said that, but when I read it, it stuck, and I have spent my professional career trying to make sure I was ready for a rescue today. So I ask, are you ready? Do you know how complex the next rescue problem is going to be?

In order to be ready, we must have a solid grasp of the basics for confined space rescue. I’m not talking about building mechanical advantage systems or selecting the best anchor point. Yes, those skills are necessary, but I’m talking about managing your TIME. Because in confined space rescue, time is one of the greatest factors between a rescue or a recovery. One of Roco Rescue’s great Chief Instructors, Mike Adams, really helped me understand this concept in a simple way. He broke the entire rescue down into four parts.

1. Put your hands on the patient: Everything you do initially must drive towards this goal. The faster you can do that, the faster you will have a complete understanding of the complexity of the rescue. Keep it simple and get in there once you have provided for the safety of your rescuer.
2. Care and Package: Do good patient care, and treat the things that are life threatening first. Once you know the life threat, then you’ll know how much time you have to work with. Then package for the environment and the injury.
3. Extricate: Build a world class rescue system or just put your hands on the patient and move! Either way your team should be ready to perform once the patient is ready to move. The type of space and the orientation of the patient will usually dictate the how and what.
4. Lift and/or Lower and turn them over: Once the patient is out of the space, lift / lower them to ground level and turn them over to EMS. This is typically less hazardous but still just as important if you have a critical patient.

Focus on these concepts in your next confined space training; see how well your team performs, and ask plenty of questions.

Did you stumble a little bit? Was there some confusion about the plan or about who was doing what job? If so, that’s ok! Talk about it, sort it out and do it again - that is what training is for! On the other hand, maybe you cruised right through the scenario and everyone was pretty quiet. If so, perhaps that’s because your jobs are well defined and your team knows what is always coming next. Or was it just because you have done the same drill from the same space for the last 10 years? Either way it’s time to turn up the heat and start challenging your team to get them to the next level.

If you’ve trained with us at Roco Rescue, then you’re familiar with our version of the K.I.S.S. principle: “Keep It SAFE and SIMPLE.” I’ve used it many times, and it works, but as our depth of knowledge grows and the complexity of the incident grows, the “devil” is really in the details. The masters of any craft only became masters through practice. So you want to know some Advanced Confined Space Rescue Techniques? You want to be a Confined Space Rescue Technician?

Train, Learn, Practice.

And as always, be safe.

Chris Carlsen resides in Albuquerque, NM and has been a firefighter with Albuquerque Fire Rescue since 1998.  He currently works as the Heavy Technical Rescue Program Manager within Special Operations.  Chris took his first Roco course in 2000 and became part of Roco’s instructional cadre in 2006.  As a Roco Rescue Chief Instructor he leads courses in rope, confined space, trench and structural collapse rescue.

“It’s an intense two days. It’s exhausting and hard, but it’s also a lot of fun. I tell all my guys, ‘you’ll work your butt off at Rescue Challenge, but you’ll love every minute it.’”

- Randy Pickering, Asst Fire Chief, Valero Wilmington Refinery

Valero Wilmington has attended Roco Rescue Challenge nearly every year since 1991 and has a stellar track record in the annual event. The safety and effectiveness of the team is a commitment taken very seriously by the group, and Challenge helps them hone their skills to the max, enhancing their culture of safety.

 

There are three generally accepted types of confined space rescue: self-rescue, non-entry retrieval, and entry rescue. Just as with the hierarchy of hazard mitigation, confined space rescue should be approached with an ascending hierarchy in mind. 

1. Self-rescue is typically the fastest type and eliminates or at least greatly reduces the chance that anyone else will be put at risk. For these reasons, it is the first choice, but it is unrealistic to think that an entrant would be able to rescue themselves in all situations.
2. Non-entry retrieval is the next choice. OSHA stipulates that non-entry retrieval must be considered as a means of rescue – more on that shortly.
3. Entry rescue is the last choice, largely because it exposes the rescuers to the same hazards that the original entrant faced.

OSHA recognizes the inherent danger of entry rescue, which is why the organization mandates “retrieval systems or methods shall be used whenever an authorized entrant enters a permit space.” However, OSHA goes on to qualify this statement with two very important exceptions. OSHA requires non-entry retrieval, “unless the retrieval equipment would increase the overall risk of entry or would not contribute to the rescue of the entrant.”  Let’s examine each of these two provisions more closely... 

1. Non-entry retrieval is required “…unless the retrieval equipment would increase the overall risk of entry.” For example, if the retrieval line would create an entanglement hazard that would impede the entrant’s ability to exit the space, then the retrieval system should not be used and entry rescue should be the choice.
2. And non-entry retrieval is required unless the equipment “…would not contribute to the rescue of the entrant.” The key here is that the non-entry method employed must be viable. It must work when called into action.

For non-entry retrieval systems, we are relying on that retrieval line to exert forces on the entrant to pull them out of the space without help from any other device or human intervention within the space. It must perform without someone inside the space maneuvering the victim or otherwise providing assistance to the retrieval system. It has to work independently of any other forces other than what is generated from outside the space. This extremely important point is often overlooked and has resulted in many fatalities. Sadly, many of those fatalities were the would-be rescuers that attempted entry rescue when the retrieval system failed to do its intended job.

Situations that may render the retrieval system useless would be any configuration or obstruction inside the space that would prevent the system from pulling the victim clear of the space in an unimpeded manner. This could be pipework or obstructions on the floor for a horizontal movement. Likewise, pulling an unconscious victim around corners may render a retrieval system ineffective. If the entrant moves over any edge and down into a lower area offset from an overhead portal even at moderate angles, the retrieval system will probably not be able to pull an inert victim up and over that edge, even if the drop were only a foot or so.

It must be clearly understood that retrieval systems may quite possibly be applying forces on a limp human body, which, as harsh as this sounds, becomes a sort of anchor. It requires a very thorough and honest evaluation of where the entrant will be moving in the space in order to perform their planned work, and what obstructions or structural configurations are in that path. If there is any possibility that the system will not be able to pull an unconscious, inert victim along that path, then the retrieval system is NOT viable.

Okay, so you have done a thorough and honest evaluation of the space, its configuration, and internal obstructions and determined that there is a clear path from the entrant’s “planned” work area, which is offset ten feet from the overhead portal eight feet above. Clearly, the retrieval system will be able to pull the victim out of the space should the need arise. Enter human nature, and with that comes bad decisions. Murphy’s Law has a very nasty way of changing things for the worse. 

What if, in the course of the planned work, our entrant drops his wrench down into a sump immediately adjacent to his work zone but further from the overhead portal? The fixed ladder down into the sump is only five feet and he can clearly see the wrench stuck in the sludge below. He asks for slack on the retrieval line, climbs down into the sump, bends down to grab his wrench and is nearly immediately rendered unconscious due to an undetected atmospheric hazard. 

The attendant/rescuer sees that the entrant’s head and shoulders do not reappear and within several seconds calls to ask if he is ok, only to hear no answer. He calls several more times, but still no answer. He begins to haul with the retrieval system, which consists of a wire rope winch mounted to a tripod.  The cable becomes tight and the tripod shudders and shifts slightly, then all progress stops. The would-be rescuer tries with all his might to pull the entrant’s limp body up and over the 90-degree concrete edge, but cannot. 

In a panic, the attendant/rescuer climbs down into the space and over to the sump where he sees the entrant pulled tightly against the wall of the sump but not off the floor. He climbs down into the sump to attempt to lift the entrant’s 200-pound limp body up and over the five-foot wall. As soon as he bends down to cradle him, the hazardous atmosphere overcomes him also. Two fatalities later, we wonder how our non-entry rescue retrieval system could have failed us. It would not have, had human nature not interfered and caused two people to make bad decisions. 

That story was intended to point out that things do not always go according to plan. Not only do we humans make bad decisions on occasion, but we also have accidents due to trips, slips, and falls that may send us to an area that the retrieval system may not work. Conditions inside the space may change in such a manner that it affects the retrieval system. 

For all these reasons I implore you to evaluate the capability of the retrieval system to work not only when things go according to plan, but also to evaluate the system based on the “what ifs.” For the “what ifs” that involve bad decisions, that is a matter of training and communicating to the entry team why they cannot deviate from the work plan, even to fetch that dropped wrench. For the “what ifs” that include trips, slips, falls, or equipment failures, it may be time to consider a back-up plan, which may include an entry rescue capability.

A rash of trench incidents has left behind multiple fatalities and untold devastation to families. The following incidents occurred in only a matter of weeks. We log these incidents as a reminder of how deadly trenches can be. Proper training and the right equipment are needed before attempting a rescue; or, as in most cases, a recovery.

These events came to our attention over recent weeks including one incident in which the victim was not even in the trench until the ground collapsed beneath him. Another incident happened adjacent to the department where one of our Roco Chief Instructors (Brad Warr) works in Idaho. His department also responded.

As you read these accounts, pay careful attention to how tragic and deadly these incidents can be.

We’ve also included two successful trench rescues at the end of these stories.

REMEMBER: OSHA advises to “Protect Yourself…” Do not enter an unprotected trench! Trenches 5-feet deep or greater require a protective system unless the excavation is made entirely in stable rock. Trenches 20-foot deep or greater require protective systems designed by a registered professional engineer. OSHA also requires safe access and egress to all excavations, including ladders, steps, ramps or other safe means in trenches 4-feet or deeper. The devices must be located within 25-feet of all workers.

Worker Killed After Being Trapped in 16-Foot-Deep Trench

(4/26/19) DEKALB COUNTY, GEORGIA 

Fire-Rescue crews were called out to a subdivision construction site Friday afternoon in DeKalb County after crews reported that a 16-foot trench had collapsed on top of a worker.

Firefighters said that the man was helping to guide a backhoe as it dug the trench and the ground gave way, trapping the construction worker inside.

"The ground below him caved in and he fell into the hole. The hole was about 16 feet deep and about two feet of dirt on each side of the hole fell on top of the victim and covered him up," said Capt. Dion Bentley with DeKalb Fire Rescue.

Firefighters reported that two other construction workers at the site tried to rescue the victim when it first happened.

Investigators said there was no trench box inside the hole when the collapse happened. Crews said that was because no one was working inside the trench when the collapse happened. It is unclear if that violates OSHA rules. OSHA officials will now be responsible for investigating the incident.

Man Dies Before Being Rescued from Trench

(4/25/19) ALPINE, UTAH

A man working to install a pool in the backyard of a home died in a trench collapse Wednesday afternoon, authorities said.

The victim, a 53-year-old man, was pronounced dead at the scene from injuries suffered in the collapse, Lone Peak Fire Chief Reed Thompson said.

Lone Peak Fire Department crews responded to the collapse shortly after 1 p.m. When crews arrived, they found a man with dirt up to his waist.

"We were told by others on scene that prior to our arrival, he had been encapsulated up to his neck," Thompson said.

The man died before crews could rescue him from the fallen trench, Thompson added. The Lone Peak Fire Department was helped in the recovery effort by the Utah County Technical Rescue Team, which includes crews from American Fork, Lehi, Pleasant Grove and Orem.

"In this particular incident, the victim was in a trench that did not have any security measure in place — such as shoring — and was deeper than what OSHA requires at 4 feet," Thompson said. "As a result of that, you've got heavy dirt and other materials that can potentially fall or collapse into the open hole, which is what occurred."

Man Dies When Trench Collapses

(4/21/19) LYCOMING COUNTY, PENNSYLVANIA

One man was killed in a rural area when a trench dug to fix a water line problem collapsed around him. The man was pronounced dead in the trench but it took nearly three hours to remove the body. Rescuers first had to shore the sides of the eight-foot deep ditch. The coroner listed asphyxiation as the cause of death.

While there were no witnesses to the collapse, family members believe he was buried about 15 minutes in the 15-foot long x 6-foot wide trench. Family members had cleared the clay-based soil from around the victim’s head before emergency responders arrived at the scene.

Although no pulse was detected, rescuers continued to remove dirt down to his waist in a rescue effort. Those efforts were discontinued once a paramedic with a heart monitor determined he was dead.

Two Workers Die in Colorado Trench Collapse

(4/17/19) WELD COUNTY, COLORADO

Two construction workers died after having been trapped in a 15-foot-deep trench that collapsed on top of them at a Colorado residential property.

The Fire Chief of Windsor Severance Fire Rescue said that the two men were working in the trench when it collapsed, completely burying them in dirt and compact soil.

Despite an hours-long rescue operation, both men died from injuries sustained in the incident. It was early the next morning when the fire department announced that the operation had switched from a rescue to a recovery effort, which was expected to take several more hours.

When Windsor Fire Rescue arrived on the scene, workers had been able to insert a PVC pipe to one of the trapped men, allowing him to communicate with the rescue crews above ground. No contact with the second worker was made, the release said.

The soil condition of where the workers were trapped made the excavation process more difficult as only small hand shovels and buckets could be used since the ground was both unstable and compacted.

Extreme caution was used to prevent further injury to the two men, the release said.

When rescue workers reached the trapped men, they had already succumbed to their injuries.

(Photo used above is courtesy of Windsor Severance Fire Rescue.)

Two Dead After Trench Collapse

(4/10/2019) NEW PLYMOUTH, IDAHO

Two men, working for a private company installing irrigation pipes in a rural area, were killed when the trench they were working in collapsed. Emergency responders were able to extricate the two men from the trench, but were unable to resuscitate them.

Payette County dispatchers sent three different fire departments, paramedics, law enforcement, two separate highway departments and a private construction company to the scene to extricate the men.

TRENCH RESCUES:

Man Rescued after being Buried Up to His Waist

(April 2019) FREMONT, CALIFORNIA

A man was rescued when he was trapped up to the waist in a trench incident. The Fremont Fire Department was able to remove the individual from the trench. The victim was hospitalized with moderate injuries.

Construction Worker Rescued from Trench

(April 2019) CALDWELL, IDAHO

A construction worker was taken by air ambulance to a local hospital after getting hit by a bucket that fell off a tractor into a trench, according to the Caldwell Fire Department.

Either water or sewer lines were being installed when a bucket detached from a tractor and injured a construction worker in the approximately 20-foot-deep trench, said Caldwell Fire Chief Mark Wendelsdorf.

The bucket had to be removed from the trench before the man was rescued, though Wendelsdorf did not know if that meant the man was pinned by the bucket, or if it was only preventing him from getting out.

The Nampa Fire Department’s ladder truck was used and acted as a rigging system to get the injured man out.

The trench did have a trench box and shoring in place. OSHA is investigating the incident, according to a Department of Labor spokesperson.

The rescue took about an hour, as crews made sure that the trench would not collapse while the technical rescue took place.

NOTICE:
At some time, every emergency responder may be called to a trench incident – whether a rural area or industrial construction site. Know, at minimum, how to protect yourself. Roco Trench Rescue courses offer safe, practical techniques for dealing with trench rescue incidents. Sign up now or call to observe one of our hands-on trench classes.