ENABLE OKLAHOMA INTRASTATE TRANSMISSION, LLC

Incident Narrative

LINE 106B WAS STRUCK ON 10/22/18 BY A DOZER PERFORMING WATER REMEDIATION ACTIVITIES IN CLEVELAND COUNTY, OKLAHOMA. THE DAMAGE OCCURRED IN THE MIDDLE OF A SAND/DIRT PIT RIGHT NEXT TO A LARGE POND THAT WAS FLOODED WITH UP TO 24"" OF WATER. THE BULLDOZER WAS OWNED AND OPERATED BY BUTLER BROS. SAND WHO ALSO OWNED THE LAND. BUTLER BROS. WAS TRYING TO DRAIN THE AREA BY LEAVING TRACK RUTS IN THE WET MUD, ALLOWING A PATH FOR THE WATER TO DRAIN TO NEARBY RUN OFF AREAS. AS THE DOZER WAS CROSSING A BERM NEAR AN EXPOSED SECTION OF L-106B (WHICH WAS ALL UNDERWATER, BUT IDENTIFIED WITH PIPELINE MARKERS). THE SATURATED BERM COLLAPSED UNDER THE WEIGHT OF THE DOZER. THE DOZER SLID DOWN THE EDGE OF THE BERM EMBANKMENT INTO THE EXPOSED SECTION OF LINE CREATING DAMAGE TO THE PIPE AND CAUSING IT TO LEAK GAS. ENABLE GAS CONTROL WAS NOTIFIED IMMEDIATELY AND INITIATED SHUT-IN FOR THAT SECTION OF L-106B. ENABLE O&M REPRESENTATIVES ARRIVED SHORTLY THEREAFTER TO CONTINUE TO ASSESS THE SITUATION AND CLOSE THE UPSTREAM VALVE. THE AREA WAS DRAINED AND THE PIPE WAS EVALUATED. IT WAS CONFIRMED THE DAMAGED PIPE WAS LOCATED IN AN OPEN SPAN THAT AT THE TIME OF THE INCIDENT WAS ALL UNDERWATER. THE OPEN SPAN WAS NEAR A ROAD AND WAS IDENTIFIED WITH SIGNAGE AT THE BEGINNING AND END OF THE EXPOSURE. DURING REPLACEMENT, A DECISION WAS MADE TO INCREASE THE DEPTH OF THE PIPELINE ELIMINATING THE EXPOSURE AND REDUCING THE CHANCE FOR LINE STRIKES IN THE FUTURE. THE LINE WAS RETURNED TO SERVICE ON 11/1/2018. A CALL WAS PLACED TO THE NRC ON 10/22/18 AT 10:37 (NRC#1228144) AND A 48 HOUR FOLLOW UP WAS PROVIDED ON 10/24/18 AT 09:30 (NRC #1228370).