ENBRIDGE ENERGY, LIMITED PARTNERSHIP

Incident Narrative

AT APPROXIMATELY 10:40 AM LOCAL TIME ON FEBRUARY 25, 2014, A CONTRACT INSPECTOR DETECTED A PETROLEUM ODOR COMING FROM THE MAIN MANIFOLD AREA AT ENBRIDGE'S GRIFFITH, IN TERMINAL FACILITY. THE INSPECTOR INVESTIGATED AND OBSERVED CRUDE OIL ON THE GROUND BENEATH THE MANIFOLD PIPING. HE IMMEDIATELY CONTACTED ON-SITE ENBRIDGE PERSONNEL WHO VERIFIED THE LEAK AND CONTACTED THE CONTROL CENTER. THE MANIFOLD WAS SHUT DOWN AND ISOLATED AT 10:44 AM. SUBSEQUENT INVESTIGATION REVEALED A FAILED 2"" DRAIN PIPING ASSEMBLY ON THE BOTTOM OF THE LINE 6B SUCTION HEADER WITHIN THE MANIFOLD AREA. THE AFFECTED PIPING HAS BEEN REMOVED FROM THE SYSTEM AND WAS SENT FOR METALLURGICAL ANALYSIS. A PLIDCO SPLIT+SLEEVE REPAIR FITTING HAS BEEN INSTALLED ON A TEMPORARY BASIS. PERMANENT REPAIRS ARE SCHEDULED TO BE COMPLETED BY END OF Q3 2016. THE METALLURGICAL ANALYSIS HAS BEEN COMPLETED WHICH IDENTIFIED THE CAUSE OF THE FAILURE AS A SURFACE FRACTURE DUE TO INTERNAL CORROSION. A REVIEW OF OPERATING RECORDS INDICATES THAT THE RELEASE LIKELY OCCURRED AT APPROXIMATELY 10:30 AM LOCAL TIME AND WILL BE REPORTED AS SUCH IN PART A, QUESTION 4 OF THIS REPORT. APPROXIMATELY 1,270 TONS OF SOIL HAS BEEN TRANSPORTED TO A LANDFILL FOR DISPOSAL.