HOLLY ENERGY PARTNERS - OPERATING, L.P.

Incident Narrative

FLASH FLOODING DUE TO UNSEASONABLY HEAVY RAINS OVER A 2-DAY PERIOD SENT RUSHING WATER THROUGHOUT A RURAL AREA WHERE THE 6"" PIPELINE IS LOCATED. DURING THE COURSE OF THE STORMS, THE PIPELINE CONTROL CENTER NOTICED A PRESSURE DROP ON THE LINE WHICH INDICATED A POTENTIAL RELEASE AND IMMEDIATELY BEGAN SHUTDOWN OF THE PIPELINE. THE REMOTE VALVES WERE CLOSED FOLLOWING THE THE PRESSURE DROP AND PERSONNEL BEGAN ATTEMPTING TO CLOSE MANUAL VALVES UPSTREAM AND DOWNSTREAM ALONG THE PIPELINE. DUE TO FLOOD WATERS AND IMPASSABLE ROADS HOWEVER, PERSONNEL WERE UNABLE TO DETERMINE AN EXACT LEAK LOCATION IMMEDIATELY. AERIAL AND FOOT PATROLS BEGAN THE FOLLOWING DAY BUT WEATHER CONDITIONS AND CONTINUING HIGH WATER LEVELS PROHIBITED PERSONNEL FROM LOCATING ANY DAMAGED PIPE OR RELEASE OF PRODUCT. PERSONNEL TO BEGIN TRAVERSING THE RIGHT-OF-WAY ONCE FLOOD WATERS RECEDED; AND ON 9/14/2013 THE PIPELINE WAS FOUND TO BE EXPOSED FROM FLOOD. UPON FURTHER INVESTIGATION, THE RELEASE LOCATION WAS FOUND AND IT WAS DETERMINED THAT A ROCK OR OTHER LARGE OBJECT HIT THE PIPELINE CAUSING A PUNCTURE IN THE PIPE. A PORTABLE FLARE WAS TAKEN TO AN UPSTREAM VALVE LOCATION AND THE ISOLATED SECTION OF LINE WAS BLOWN DOWN UNTIL THE ISOLATED SECTION OF PIPE WAS FULLY EVACUATED. A CLAMP WAS SUCCESSFULLY INSTALLED AT THE RELEASE LOCATION AND THIS SECTION OF PIPE WAS SUBSEQUENTLY REPLACED AND THE LINE WAS RESTARTED FOLLOWING FINAL REPAIRS.