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<td><a href="https://misportal.jlab.org/ll/index.jsf?function=view&lessonId=1138">480 Volt Line Struck by Excavation Equipment ¿ Idaho National Laboratory (INL)</a></td>
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<h2 style="white-space:nowrap">Statement of Lessons Learned</h2>
<pre>When mechanical excavation is performed within the vicinity of known utilities there is an increased chance of damaging utilities, equipment, and injuring individuals. Follow all requirements that pertain to mechanical excavation in the vicinity of known utilities. </pre>
<h2 style="white-space:nowrap">Discussion of Activities</h2>
<pre>On September 14, 2020, two sub-tier construction subcontractor employees were performing excavation operations to provide power to construction trailers. During the work evolution, a sub-tier subcontract employee elected to utilize a backhoe to excavate over identified live 480-Volt (480V) electrical lines. This action was noncompliant with the work Requirements Document (RD) 2014 Excavation and Surface Penetrations and was different from the soft digging methods that had previously been used to identify the electrical lines.
While performing the operation, the bucket of the backhoe contacted and damaged a 480V line buried approximately 3.5 feet below the surface. The contact resulted in a popping noise, smoke, and an electrical arc. After the damage occurred the two construction sub-tier employees placed the area in a safe condition and notified supervision. No shock or injury occurred due to this event.
</pre>
<h2 style="white-space:nowrap">Analysis</h2>
<pre>A "barrier analysis" process was used in accordance with guidance document GDE-634, "Cause Analysis", to determine why the live 480V line was struck with the backhoe. The "barrier analysis" is based on the premise that hazards are associated with all events. Barriers are developed and integrated into a system or work process to protect personnel and equipment from hazards. For an event to occur, there must be a hazard that comes into contact with a target as a result of unused or failed barriers.</pre>
<h2 style="white-space:nowrap">Recommended Actions</h2>
<pre>Ensure all employees who perform excavation activities understand:
* The procedures and requirements that govern excavation work.
* The information that is provided to them through excavation permits and subsurface investigations.
* The requirements of the Job Safety Analysis (JSA) to eliminate the hazards of the activity.
* That everyone has stop work authority and it is their responsibility to use that authority when work is not occurring as planned.
</pre>
<h2 style="white-space:nowrap">JLab Preventive Measures</h2>
<pre>ES&H Manual Chapter 3320 Temporary Work Permits identifies excavating as a hazardous activity which requires a Facilities Management Digging and Excavations Permit. This permit is required on Jefferson Lab property for any mechanized excavations or excavations using hand tools to penetrate the ground greater than 12 inches. Excavation, digging, or boring into soil or demolition at Jefferson Lab is performed only after utilities have been located and marked by a competent person.</pre>
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<h2>Comments</h2>
<h5 style="white-space:nowrap">2/10/2021 9:28:40 AM by Bailey, Mary Jo</h5>
<pre>Submitted to those current in
SAF502: Be able to operate a forklift safely
GEN020: Understand the requirements and mechanisms associated with being a qualified SOTR</pre>
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<div class="yui-u" id="lesson_info">
<fieldset>
<legend>Summary</legend>
<table>
<tr class="row">
<td class="label" nowrap>Lesson ID:</td>
<td class="dataval">1138</td>
</tr>
<tr class="row">
<td class="label" nowrap>Status:</td>
<td class="dataval">OK</td>
</tr>
<tr class="row">
<td class="label" nowrap>Doc ID:</td>
<td class="dataval">2021-JLAB-1138</td>
</tr>
<tr class="row">
<td class="label" nowrap>Priority:</td>
<td class="dataval">Caution</td>
</tr>
<tr class="row">
<td class="label" nowrap>Safety Related:</td>
<td class="dataval">YES</td>
</tr>
<tr class="row">
<td class="label" nowrap>Originator:</td>
<td class="dataval">Bailey, Mary Jo</td>
</tr>
<tr class="row">
<td class="label" nowrap>Issued:</td>
<td class="dataval">2/10/2021 9:21:55 AM</td>
</tr>
<tr class="row">
<td class="label" nowrap>Approved By:</td>
<td class="dataval">Bailey, Mary Jo</td>
</tr>
<tr class="row">
<td class="label" nowrap>Approved On:</td>
<td class="dataval">2/10/2021 9:28:40 AM</td>
</tr>
<tr class="row">
<td class="label">Source:</td>
<td class="dataval">
DOECRD
</td>
</tr>
<tr class="row">
<td class="label" nowrap>Location:</td>
<td class="dataval">INL</td>
</tr>
<tr class="row">
<td class="label" nowrap>Cost Savings:</td>
<td class="dataval"></td>
</tr>
<tr class="row">
<td class="label" nowrap>Contact:</td>
<td class="dataval">Shawn Kevan Going, Facilities Support Services Manager (INL), Shawn.Going@inl.gov, 208-526-3270</td>
</tr>
<tr class="row">
<td class="label" nowrap>Queued Emails:</td>
<td class="dataval">377</td>
</tr>
<tr class="row">
<td class="label" nowrap>Sent Emails:</td>
<td class="dataval">0</td>
</tr>
<tr class="row">
<td class="label" nowrap>Viewings:</td>
<td class="dataval">1 times</td>
</tr>
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</fieldset>
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<li><a target="_blank" href="https://misportal.jlab.org/ll/downloadAttachment?attachmentId=5844">Blind Dig - INL.pdf</a></li>
</ul>
<hr>
</fieldset>
<fieldset>
<legend>Hazard Issues</legend>
<ul class="lesson_attribute_listing">
<li>Electricity</li>
<li>Material Handling Equipment</li>
</ul>
</fieldset>
<fieldset>
<legend>Skills</legend>
<ul class="lesson_attribute_listing">
<li>SAF502: Be able to operate a forklift safely</li>
<li>GEN020: Understand the requirements and mechanisms associated with being a qualified SOTR</li>
</ul>
</fieldset>
<fieldset>
<legend>Distribution/Notification</legend>
<ul class="lesson_attribute_listing">
<li>*Division Safety Officers (DSOs)</li>
<li>*Safety Wardens</li>
<li>*ESH&Q Liaisons</li>
<li>*DOE Notification</li>
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