ENTERPRISE PRODUCTS OPERATING LLC — Gas transmission and gathering — incident on 2014-01-13

Gas transmission and gathering incident in FLORESVILLE, WILSON County, TX. Reported cause: OTHER INCIDENT CAUSE. Reported consequences: 0 fatalities, 0 injuries, 0 NATURAL GAS released, $0 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20140019.

Operator ID: 31618.

Reported incident date: 1/13/2014 4:13.

Location detail: STATION 536

Cause detail: MISCELLANEOUS

Cause detail: ON MONDAY, JANUARY 13, 2014 AT APPROXIMATELY 12:30 AM THE YOAKUM PLANT SHUT DOWN. GAS CONTROL MONITORED PIPELINE PRESSURE/LINE PACK FOR LINE 287-1, HAVING AN MAOP OF 1100 PSIG. AT 4:13 AM, GAS CONTROL RECEIVED A CALL FROM THE WILSON COUNTY SHERRIFF'S DEPARTMENT, REPORTING A POPPING SOUND AT STATION 536 AND THAT THEY HAD CLOSED HIGHWAY 536 DUE TO VENTING OF NATURAL GAS. THE RELIEF VALVE WAS SET TO RELIEVE AT 1100 PSIG. GAS CONTROL WAS ABLE TO LOWER THE OPERATING PRESSURE BY DIVERTING GAS SUPPLIES. WHEN OPERATIONS ARRIVED ON THE SCENE AT 5:36 AM, THE PRESSURE WAS REDUCED SUCH THAT THE INCIDENT HAD ENDED. THE GAS RELEASE VOLUME WAS CALCULATED TO BE APPROXIMATELY 3.47 MSCF. THE RELIEF VALVE FUNCTIONED AS DESIGNED TO INTENTIONALLY RELEASE EXCESS PRESSURE INTO A SAFE ENVIRONMENT TO AVOID AN OVERPRESSURE SITUATION.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: ALL OTHER CAUSES — MISCELLANEOUS.

PHMSA indexed costs: $17,350 reported total cost, $12,002.189 in 1984 dollars, $14,736.865 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.