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CENTERPOINT ENERGY GAS TRANSMISSION

gas_transmission Incident — — June 20, 2012

Incident Information

Incident DateJune 20, 2012
OperatorCENTERPOINT ENERGY GAS TRANSMISSION
CommodityNATURAL GAS
Pipeline Typegas_transmission

Location

State
Coordinates33.22643, -92.69473

Cause

CauseEXCAVATION DAMAGE
SubcauseEXCAVATION DAMAGE BY THIRD PARTY

Casualties

Fatalities0
Injuries0

Costs

Property Damage$90,760
Emergency Response$1,000
Other Costs$0

Location Map

Incident Narrative

ON 6/20/12 AT 5:46PM CONNER WILSON/SOUTHERN BRUSH SW INC. CONTACTED CEGT PERSONNEL, FROM THE EL DORADO OFFICE, AND SAID THEY HAD HIT A TAP VALVE ON OUR LINE WITH THEIR ROW EQUIPMENT AND IT WAS LEAKING. AT 6:00PM SYSTEM CONTROL WAS CONTACTED AND NOTIFIED OF A POSSIBLE INCIDENT. AT 6:11PM CEGT PERSONNEL ARRIVED ON SITE AND IDENTIFIED A BROKEN TAP VALVE ON KT-1 OFF OF FOREST LANE. AT 7:00PM PLANS WERE MADE FOR THE CEGT TEAM MEMBERS TO MONITOR THE LEAK UNTIL FIXED. THE DECISION WAS MADE TO INSTALL THREE WAY STOPPLE FITTINGS AND APPROXIMATELY 60' OF PIPE. AT 7:22PM IT WAS DETERMINED THAT THIS EVENT MAY MEET THE DEFINITION OF AN INCIDENT (BASED ON REPAIR COST ESTIMATES) AND NOTIFICATION WAS MADE TO SYSTEM CONTROL. CONFIRMATION OF AN INCIDENT WAS DETERMINED AND AT 8:16PM A REPORT WAS FILED BY SYSTEM CONTROL TO NRC AND THE STATE OF ARKANSAS EMERGENCY MANAGEMENT. AT 8:30PM JERRY THOMAS WITH UNION COUNTY EMERGENCY MANAGEMENT ARRIVED ON SITE TO LOOK AT LEAK AND DISCUSS CEGT'S REPAIR METHODS AND TIMEFRAME FOR REPAIRS. ON 6/21/12 AT 11:16AM CEGT'S REPAIR CONTRACTOR ARRIVED ON SITE. AT 2:35PM SYSTEM CONTROL WAS CONTACTED AND ADVISED THAT THE PIPELINE WAS BEING EXCAVATED. AT 3:58PM CEGT EMPLOYEES DISTRIBUTED THE REPAIR GAS HANDLING PLAN TO SYSTEM CONTROL AND OPERATIONS STAFF. AT 6:01PM THE REPAIR CONTRACTOR BEGAN SANDBLASTING AND PREPARING TO WELD ON STOPPLE FITTINGS. ON 6/22/2012 AT 6:30AM SYSTEM CONTROL WAS NOTIFIED THAT THE PROCESS TO WELD THE FITTINGS WAS GOING TO BEGIN. AT 11:15AM CREWS BEGAN WELDING THE LINE PIPE TO THE FITTINGS ON THE PIPE. AT 2:15PM THE CONTRACTOR BEGAN THE NITROGEN TEST ON THE FITTINGS. ON 6/23/12 AT 6:53AM CEGT PERSONNEL CONTACTED SYSTEM CONTROL AND NOTIFIED THEM WE WERE STARTING WORK. AT 10:49AM CEGT PERSONNEL CONTACTED SYSTEM CONTROL AND NOTIFIED THEM THAT THEY WERE HOT TAPPING AND THEN BLOWING DOWN THE SECTION OF LINE. AT 11:10AM THE LINE SEGMENT WAS BLOWN DOWN AND OUT OF SERVICE. AT 3:01PM CEGT PERSONNEL CONTACTED SYSTEM CONTROL TO NOTIFY THEM WE WERE GETTING READY TO BACKFILL THE SITE. AT 6:30PM CREWS LEFT SITE.

About This Pipeline Incident

Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.

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