ENOGEX LLC

Incident Narrative

ON THE MORNING OF JUNE 29TH, LOCAL LAND OWNERS NOTIFIED HIGHLAND TO REPORT A POSSIBLE LINE RUPTURE SOUTH OF THE HIGHLAND KINTA YARD. HIGHLAND THEN CONTACTED ENOGEX. ENOGEX RESPONDED TO THE REPORT AND DROVE TO THE SITE FOR CONFIRMATION. AFTER CONFIRMING THE RUPTURE, ENOGEX CLOSED THE UPSTREAM VALVE AT ROBBERS CAVE JUNCTION, AND PROCEEDED TO THE KINTA YARD TO CLOSE THE DOWNSTREAM VALVE ON L-111, AND AT THIS POINT WAS ABLE TO CONFIRM THE RUPTURE. AFTER THE LINE WAS BLOWN DOWN, ENOGEX EVALUATED THE PIPELINE AND IT WAS DETERMINED THAT THE RUPTURE WAS ON AN INACTIVE 4"" LATERAL (ARCO SNOW LATERAL) THAT TIES INTO L-111. AT THE TIME OF THE RUPTURE THE LATERAL WAS CAPPED AND INACTIVE. SINCE THE RUPTURE OCCURRED IN AN AREA BETWEEN L-111 AND THE BLIND INSTALLED ON THE ARCO LATERAL, L-111 TRANSMISSION GAS WAS VENTING THROUGH THE RUPTURE ON THE LATERAL. THE DECISION WAS MADE TO REMOVE 44' OF L-111 PIPE, INCLUDING THE ARCO TIE IN, AND REPLACING IT WITH 44' OF NEW PIPE. LINE 111 WAS REPAIRED AND PLACED BACK INTO SERVICE ON 7/2/13.