This article was posted 12/16/2008 and is most likely outdated.

The Electric Shock Drowning of Samantha Chipley
 

 

Topic - Grounding and Safety
Subject - The Electric Shock Drowning of Samantha Chipley

December 16, 2008
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The Electric Shock Drowning of Samantha Chipley

 

Hi Mike,

 

A fatality investigation I was working on has recently settled and the attorney has provided the following summary.

 

 It is the intent of the mother of the deceased girl to have this write-up get into the hands of as many people as possible in the hopes of saving some other mother from having to go through what she has had to endure.

 

Of course, an intact bonding system would have prevented this accident. Many marinas are not meeting their obligation to assure that a boat they supply power to can safely use that power. My seminars take direct aim at this problem and have now been given to the staff of 175 marinas over the past 2.5 years. 

 

Thought you would be interested in seeing this.

 

Regards,

Jim Shafer

Harbor Marine Consultants, Inc.

 

On June 27, 2005, Samantha Chipley and her friends, Margaret, Susie and Courtney, arrived at the Scott Creek Marina on Cave Run Lake, which is located in Eastern Kentucky.  The girls were planning on spending the night on a houseboat owned by Susie's father.  This was Samantha's first time at the marina.  It was a very hot June afternoon and the four girls jumped in the water.  Although there were “No Swimming” signs that warned of the danger of electrocution, it was common practice for patrons to swim at the marina.  At the time of the incident, Samantha and Margaret were in the water swimming while Susie and Courtney were retrieving floats from another boat that was nearby.  Samantha tried to climb on a raft with Margaret when she suddenly started jerking in the water.  Margaret jumped off the raft to help Samantha and felt a shock go through her entire body. Both Samantha and Margaret swam towards the houseboat.   

 

Susie and Courtney rushed to the back of the boat and tried to help get Samantha and Margaret out of the water.  Eventually, Margaret was pulled to safety by grabbing on to a beach towel.  The girls watched helplessly as Samantha was shocked for several minutes while she struggled to stay above water.  A Good Samaritan dove into the water in an attempt save Samantha.  When the Samaritan was shocked, in what he later described as being locked up in a “dead hum,” he was forced to turn around, barely escaping.  By all accounts, the incident lasted about seven (7) minutes.  Eventually Samantha disappeared into the darkness.  Her body was recovered hours later.

 

Margaret later described the incident, painting a horrifying picture of what the girls experienced.  Margaret stated that the shock felt similar to the stinging pain you experience when your foot goes to sleep.  However, she felt this sensation throughout her entire body.  The shock was so intense that Margaret couldn't move her fingers.  As Margaret and Samantha moved closer to the houseboat, the intensity increased.  Margaret grabbed Samantha’s shirt to try to keep her from going under.  At that point, the intensity was so great that there was nothing either girl could do.  Margaret stopped breathing as her body tensed up.  She began to feel like she was going to pass out and like her feet were sinking to the bottom of the lake.  Margaret was worried that she was going to die, and her thoughts were racing.  She stated that during the last minute she was in the water, she had come to terms with the fact that she was going to die.  Margaret tried to float on her back because she did not want to look down into the darkness.  Margaret stated that she thought if she were on her back, she would be able to look up at the sky in order to find her way to heaven as her body descended into the darkness of the bottom of the lake.  Margaret's testimony epitomizes what Samantha likely experienced during her last moments of life.     

 

Subsequent investigation revealed that the houseboat’s wiring system did not contain a ground wire.  At the time of the incident, the boat was plugged into the marina's power pedestal.  It was believed by many that a battery charger located in the engine compartment of the boat faulted, which energized the boat's hull.  Others opined that a light aboard the houseboat shorted out and energized the hull.  Once the boat's hull became energized, the water surrounding the boat and the marina became lethal. 

 

Samantha’s family and friends were heartbroken by such a preventable tragedy.  Hoping that she could stop another child from dying in such a way, Samantha’s mother, Roberta Chipley, filed a lawsuit against the owner of the houseboat, as well as against the marina and other entities.  Over two (2) years of litigation followed. 

 

The primary legal issue in the case was whether or not the marina could be held legally responsible for Samantha’s death.  Like many marinas, the marina leased boat slips and sold electricity to its boat owners.  Samantha’s estate argued the marina had a common law duty to inspect boats moored there before permitting them connect to the marina’s power supply.  Further, Samantha’s estate argued that the marina had a duty to install ground fault monitoring and/or ground fault protection to monitor and/or to prevent electricity from entering the water in and surrounding the marina.  The marina argued that it had no duty to protect Samantha by inspecting boats, or by installing ground fault monitoring and/or ground fault protection.  The marina submitted that the boat owner was solely responsible for the tragedy.  The week before trial, at a court ordered settlement conference, the case was settled for $700,000.00.  Samantha Chipley’s family hopes that her story will serve as a catalyst for much needed change in the marina industry.  

 

Hon. B. Clark Batten II

Garmer & O’Brien, LLP

May 13, 2008

        

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Comments
  • One of the technologies used in mines against this kind of hazard is continuous monitoring of the equipment grounding path. The problem with using this technology with a boat is the parallel path in the water and how to distinguish that from a real equipment ground particularly salt water.

    The idea that an electrocution drowning cannot occur is salt water is contradicted by an industrial machine that in known as a single electrode spot welder. This runs current through a single copper bar parallel to the work. This is what is used to weld wire guards for air conditioners and fans. Even though the copper bar is of larger cross section and greater conductivity than the wire guard, there is nevertheless enough of a parallel path in the steel wires to produce efrective welding. If you tried to use a 2 electrode welder the electrodes would actually smash and ruin the joint.

    Michael R. Cole
    Reply to this comment

  • I also suspect that 1 potential culprit is regrounding of the neutral. Since a boat that has a shore power cord would also have a generator, a neutral switching transfer switch from generator to shore power would be needed to prevent this.

    If lets say that the neutral is regrounded and then both the equipment ground and neutral in the shore power cord fail, than the only return path is through the water.

    A good idea is to have a box in the shore power that test for regrounding of the neutral before turning on the power and then use a plug-in tester to check a random sample of outlets on board the boat for hot and neutral switched, ground functioning, and so forth.

    At any rate, a boat is a hole in the water into which you pour money.

    Michael R. Cold
    Reply to this comment

  • By way of the settlement, the case was settled monetarily. However, was there any resolution for who was responsible? I ask this question realizing that most settlement agreements also include a denial of culpability. This tragedy is made exponentially more tragic when no one is assigned responsibility to ensure that the risk is abated.

    I'm sure there are those who would say that Samantha and her friends are at least partially to blame for ignoring the warning signs. But what of someone who simply looses footing and slips into the water? Personal flotation vests are a testimony to the fact that inadvertent entry to the water is a real possibility.

    The sad fact is that the NEC has no requirement for GFCI in shore power sources and, as long as there is no regulatory requirement, Samantha's tragedy is lying in wait for the next unsuspecting victim.

    Rick Pope
    Reply to this comment

  • This sad story began with " Although there were No Swimming signs that warned of the danger of electrocution".

    Personal responsibility is everyone's duty. The sign was posted for a reason. Yes, this is sad. Yes, this was preventable. And yes, the parents and the victim both shoulder some of the responsibility.

    Accidents are never a single occurence. It is a series of incidents, all lined up like the tumblers in a lock. Remove any one of the incidents (or tumblers) and the accident does not occur and the lock does not open.

    Had the victim paid heed to the waring sign, there would not have been an accident, even though there was electrical current in the water.

    This in no way lessens the sadness of the families involved, and it is a tragic situation that was preventable.

    mike tooke
    Reply to this comment

  • Any reasonable person would expect that people in a marina might have contact with the water. A "no swimming" sign does not excuse the marina's owner from their responsibility to provide a safe facility. A GFCI system and proper bonding would have eliminated the problem - either that or not providing electricity to the boats.

    The girl died a horrible, preventable death. Rather than excusing the owner from responsibility, the sign acknowledges that the owner was aware of the hazard and had done nothing to remedy it.

    Danielk Smith
    Reply to this comment

  • who paid the sttlement, the marina or the boat owner?

    jerry alan
    Reply to this comment

  • what a sad sad story, i am so sorry for the lost of anyone from something so preventable. the boat owner and the owners of the slip are at fault. please let this be a sad and god fearing lesson.

    JACK
    Reply to this comment

  • As sad as this is, I can relate. Back in 1974 the swim team captain was swimming in Lake Washington near Seattle and attempted to climb out of the water at a marina and lost his life due to electrocution blamed on "faulty wiring" at the time. GFIC's were just starting to enter the market & mandated at kitchen and bath receptacles at that time. There's no reason marinas could not be retrofitted with such; either new construction and or existing for insurance purposes. Another needless death taking an innocent person to Heaven way to early in her life. God Bless you Samantha and same to your family and friends;-)

    Tall Bill
    Reply to this comment

  • right...they wanted to protect the marina from further incidents...and..oh yea..they kept the 750,000.

    mmmmar
    Reply to this comment

  • Alright I'm confused about this one. So there's no ground...OK. There's a fault that's undetermined where it came from, but a fault none the less. The hull is energized and is in contact with the water... OK. People are swimming in the water and getting shocked, one dies. How are they getting shocked? Where's the potential difference? Wouldn't they have to also be in contact with a grounded object or an object with different potential? How is electricity passing through the body?

    Donald Ras
    Reply to this comment

  • If we follow the line of reasoning that posting "NO SWIMMING" signs makes a hazard OK, Then why doesn't OSHA just require signs on work sites that say "DON'T GET HURT" and thus eliminate all accidents?

    I have a problem saying that the marina owner is responsible to be sure the boat wiring is safe before allowing them to plug in. The marina owner is not a certified electrical contractor or inspector. The boat often has an electrical system with 120/240 volt AC and 12 volt DC, installed without inspection, and repaired by every owner in the back yard and out in the middle of the lake. Just how deep into the boat would this inspection have to go?

    Near the water is a difficult location, as electrical panels, conduits, and power outlets are exposed to mechanical damage, water, and all sorts of modifications on the holiday weekend when the place is full.

    Installing GFCI protection initially would be a start, but would require continued monitoring to insure that everything remained operative.

    Lynn Adams
    Reply to this comment

  • If the family of the deceased wished to prevent others from sharing a similar tragedy, then they should have settled for nothing less than legislation that would have placed the burden of prevention on all parties involved (including any governmental regulatory agency) and not settle on a private cash exchange with no public explanation. They did nothing to prevent this from happening again!

    G.Metz
    Reply to this comment

  • Gentlemen, For 8 years I have been involved in marina "electric shock drowning" (I coined the term 6 years ago) as expert witness, written numerious articles, made many presentations to the marina industry, and was co-investigator in an extensive USCG grant to explore the problem in 2007. For those who wish some well researched answers about the causes and some solutions currently being provided you are invited to visit our website: http://www.marinaguard.net. I look forward to hearing from you. Jim

    Jim Shafer
    Reply to this comment

  • So the issue of "is the marina is responsable for inspecting the dock electrical connections" is unresolved. Too bad.

    joe chapman
    Reply to this comment

  • What a horrible tragedy and my prayers go out to her family and friends.

    Until this is addressed worldwide, would it help for a Samaritan (with electrical training) to tell the victim to swim away? Even if someone doesn't intentionally go for a swim, they could fall in. Maybe a couple of extra words on a sign...

    Just a thought, Andy

    Andy N
    Reply to this comment

  • This is a sad loss and I do sympathize the situation. But come on, you take your chances when you ignore warnings and rules. The one at fault is the victim & possibly the guardian or parent for not enforcing the rules.

    Ron
    Reply to this comment

  • How Sad that this happened due to a lack of adequate protection. If I can remember there have been a number of occasions in which you Mike have mentioned deaths by electrocution in Marinas arround the US. I agree with the report that Earth leakage breakers be installed in all marinas and checked anually. I think too that all boats etc that have mains voltage systems (120/220) should also by law have earth leakage breakers so as to avoid issues like this from occuring. I know it is hard to police all the marinas and all the boats but should a death occur due to a lack of or faulty earth leakage protection system then the boat owner and mariner should be dealt with in the stiffest possible manner in order to create an atmosphere of comply or else. Secondly maybe it would be a good idea to use a form of Isolation transformer, so as to prevent any leakage to earth.

    Ed campbell
    Reply to this comment

  • I know it's trying to return to the source. I meant an object grounded to that system. The impedance of the water does make since as providing an acual circuit. I was looking at in the way you ground the neutral of a transformer. There's electricity there, but when you tap part of the windings you create a grounded conductor. You could (barefoor or not) grab two exposed parts of the transformer grounding electrode conductor and be fine. You could walk barefoot all over the ground and be fine. Even with insulated shoes on, grabbing a hot wire with no load in two exposed parts is harmless. No potential.

    Donald Ras
    Reply to this comment

  • I really do not know what type of houseboat this was. Assuming it had metal floatations and either an inboard or outboard. Regardless of the engine the battery should be charged independently of the rest of the electrical system. Because the negative side of the battery would be grounded to the engine or its mounts. There should have been a knife disconnect on the positive and negative cables to properly service the battery. This would stop the current from traveling through the rest of the system. Then there should have been an outlet on the boat to provide additional electric power to the electrical system through a cord, but the cord has to be plugged into a GFCI while docked, and when the battery is disconnected from the system.

    Joe Hartoebben
    Reply to this comment

  • Like the great one said knowledge is stored in two forms in books and and in a man's brain most important putting it into practice is who ever knows safety practices spread the word we can all learn unfortunately sometimes we wait for an accident to happen god bless us all.

    Jose A.Guillen
    Reply to this comment

  • This poor girl was killed by a voltage gradient. Voltage gradients are particularly deadly in fresh water-especially those fed by snow or glacial melt. If you see someone caught in a lake water voltage gradient you can save them if you know the direction of the voltage source. Leap into the water and stay upright-do not extend your arms or body. Swim body upright to the stricken person and turn them at mid body perpendicular to a line running from source pulling at the waste and swimming upright move from the source. Do not under any circumstance align any extended limb or body in line with the source-across the gradient.

    Bob
    Reply to this comment

  • Hello, all: Although I have 40 years in safety and was the Sr. Safety & Forensics Engineer for a fortune top 50 company and considered their leading electrical safety expert, my experience is minimal on boating electrical systems and hull designs (NAVY retired vet).

    I agree with most of the commentary on the physiological effects of shock with lower skin impedance and energy gradients. I would like more commentary on solutions given metal, non-metal hulls, isolating electrical system frames, bonding, GFCI that can work in the presence of likely leakage currents, battery charging protocols like isolating the terminals and when one is simply being connected to marina power with all light and equipment. What do you see in the owners manual for this problem if any?

    I publish a quarterly newsletter for Region II of the American Society of Safety Engineers (ASSE) and this seems like a more than worthy subject to add in my "technical corner." I would appreciate comments on the above. Regards, Ernie Harper

    Ernie Harper, CSP, DABFE, DABFET, CFC
    Reply to this comment
  • Reply from: Jim Shafer   
    Ernie, Thanks for your comments. A couple of additions. First, conditions that might harm a swimmer cannot be dectected as suggested. I have come a little further in my 8 years of work on this problem than just "a good start". I have developed 3 technical solutions, authored many technical articles on electrical injuries and property damage, carried out a USCG year long research grant on electric shock drownings, and have a very popular marina safety seminar that has been given to the staff of over 200 marinas. I would be pleased to share any of my information for your Regioal Newsletter.- let me know how I can help. Contact me at; kp2r@bellsouth.net and see - www.marinaguard.net Jim Shafer
    Reply to Jim Shafer


  • I pass my sympathy to the family Many states that have marinas do not do safety inspections or quality control of anything after the initial installation. Im sure here in my state where my sailboat is moored that the system is aprx 25 yrs old based on the products used. I see all kinds of code violations as well as safety issues. The biggest issue with me is the people who run heaters off of 14&16 gauge extension cords or the marina manager who allows unskilled people to do electrical work. I have my personal ways of settling this mess but my personal state refuses to follow any suggestions maybe some tough legal actions can take place to prevent anything further. In the trades we call this hot water;boats constantly requiring zinks to be changed are a sure sign of hot water,people need to start forcing the juridiction having authority to do the job they are paid to do Anyone having any comments please contact me on this sight. I have been a master electrician for 27 yrs

    Glenn
    Reply to this comment
  • Reply from: Jim Shafer   
    There you go again Bob - making statements that are totally wrong and which do not remotely describe galvanic problems and the solutions. You continue to do a great disservice to Mike's readers. You need a job or a hobby. Jim
    Reply to Jim Shafer

    Reply from: Bob   
    Jim, could you please tell me what statement was "totally wrong".The only items that I may be outdated on are cathodic protection for aluminum hulls and active electric cathodic protection. To the best of my knowledge zinc is still widely used as the sacrificial electrode and aluminum hulls usually don't require that protection-but I believe that only because I never changed zincs on an aluminum hulled ship. Zincs are still used in all condensers on all ships to protect the tube sheets-as these are usually steel. Also, the electric field around zincs may vary somewhat but it can never be dangerous to humans.
    Reply to Bob

    Reply from: Jim Shafer   
    Sorry Bob, I know you would like some help but I don't type well enough and you seem to not even to have a fundamental grasp of marina galvanic corrosion. My consulting rate is $150/hr - this is how I make my living. Guess I can't help. All sorts of info can be found on Google. Jim
    Reply to Jim Shafer

    Reply from: Jim Shafer   
    Bob, Thanks for the reference. Not much relevant to "plastic" boats, and IPCC systems discussed extensively, somehting you said you didn't seem to know much about - you said they may be "crazy schemes". No more. Jim
    Reply to Jim Shafer



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