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### Inspection Detail

**Case Status: CLOSED**

#### **Inspection: 1486438.015 - Mcs Communication, Llc**

**Inspection Information - Office: Iowa**

 

**Inspection Nr**

**Report ID**

**Date Opened**

----

**Site Address**: 			   Mcs Communication, Llc			   Lincoln And MainPella, IA 50219

**Mailing Address**: 			   4241 Stough Road, Concord, NC 28027

**Union Status**: NonUnion

**SIC**:

**NAICS**: 238210/Electrical Contractors

----

**Inspection Type**: Fat/Cat

**Scope**: Partial

**Advanced Notice**: N

**Ownership**: Private

**Safety/Health**: Safety

**Close Conference**: 08/03/2020

**Emphasis**:N:Trench

**Case Closed**: 02/10/2021

----

**Case Status: CLOSED**

#### **Investigation Summary**

**Investigation Nr**

**Event**

At 8:30 a.m. on August 1, 2020, Employees #1, #2, and #3, employed by a electrical services company in the telecommunications field, were working on a multi-employer construction project at the intersection of two streets.  They were potholing to locate underground utility lines, with the aim to then bore in a new fiber optic line under the intersection.  After finding what they thought was over-pour from the concrete curb, they used a Ring-o-matic Vacuum Excavator to excavate over top of the concrete.  They then used a jackhammer on the concrete.  The jackhammer bit made contact with a 12,470-volt underground electrical distribution line, and an electric arc explosion occurred.  Employees #1 and #2 were killed by electrocution.  Employee #3, who was knocked down by the force of the explosion, was transported to the hospital, where he was observed, determined to have no injuries, and released.

**Keywords:**concrete, construction, contact, drill, electric arc, electric current, electrocuted, excavation, excavator, explosion, installing, jackhammer, optical fiber cable, power lines, undrgrd installation, undrgrd power l
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