TEXAS GAS TRANSMISSION, LLC — Gas transmission and gathering — incident on 2017-10-02

Gas transmission and gathering incident in BASTROP, MOREHOUSE County, LA. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 51184 NATURAL GAS released, $176,700 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: 20170095.

Operator ID: 19270.

Reported incident date: 10/2/2017 3:35.

Location detail: 55.73

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: TEXAS GAS'S CONTROL CENTER RECEIVED NOTIFICATION FROM THE PUBLIC THAT A LOUD NOISE WAS COMING FROM ITS BASTROP COMPRESSOR STATION. WHEN LOCAL PERSONNEL ARRIVED AT THE SITE, THEY DISCOVERED GAS BLOWING FROM A 26" CHECK VALVE LOCATED AT THE T3 TURBINE PIPING. AFTER SECURING THE AREA, FURTHER EXAMINATION REVEALED THAT BOLTS ON THE CHECK VALVE SHAFT WERE BROKEN. THE CAUSE IS CURRENTLY UNDER INVESTIGATION. 3-5-18 ROOT CAUSE WAS CONFIRMED AS FATIGUE OF BOLTS ON CHECK VALVE SHAFT FAILED. 4-25-18 UPDATED WITH FINAL COSTS AND SUBMITTED FINAL REPORT.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $339,364 reported total cost, $236,248.046 in 1984 dollars, $402,733.734 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.