QUESTAR PIPELINE COMPANY — Gas transmission and gathering — incident on 2013-12-18

Gas transmission and gathering incident in MEEKER, RIO BLANCO County, CO. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 4980 NATURAL GAS released, $100 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: 20140008.

Operator ID: 12874.

Reported incident date: 12/18/2013 1:50.

Location detail: 206+60

Cause detail: THREADED CONNECTION/COUPLING FAILURE

Cause detail: CREATED SUPPLEMENTAL TO INDICATE THAT THE REPORT IS FINAL. AT 01:50 A BROKEN 1" X 3/4" THREADED BUSHING TO A PRESSURE TRANSDUCER RESULTED IN AN UNINTENDED NATURAL GAS LOSS OF APPROXIMATELY 4.98 MMSCF. A QUESTAR EMPLOYEE ARRIVED ON SITE AT 08:21 AND CONFIRMED THAT THE BUSHING LEADING TO THE PRESSURE TRANSDUCER WAS BROKEN AND ISOLATED THE AREA BY CLOSING 2 MANUAL BLOCK VALVES. THE BUSHING AND VALVE WERE REPLACED SHORTLY THEREAFTER. AFTER THIS INCIDENT QUESTAR PIPELINE ADDED AN ALARM ON THE SCADA SYSTEM FOR THIS PRESSURE TRANSDUCER.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — THREADED CONNECTION/COUPLING FAILURE.

PHMSA indexed costs: $21,565 reported total cost, $17,338.4 in 1984 dollars, $21,544.403 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.