# TRANSWESTERN PIPELINE COMPANY LLC — Gas transmission and gathering — incident on 2015-02-22

- **operation:** document
- **citation:** PHMSA Report 20150036
- **title:** TRANSWESTERN PIPELINE COMPANY LLC — Gas transmission and gathering — incident on 2015-02-22
- **source type:** incident
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2015-03-23
- **effective on:** 2015-02-22
- **summary:** Gas transmission and gathering incident in CORONA, LINCOLN County, NM. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 130000 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. PHMSA trend classification: significant incident, not serious.
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**body:**

Gas transmission and gathering incident in CORONA, LINCOLN County, NM. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 130000 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: 20150036.

Operator ID: 19610.

Reported incident date: 2/22/2015 17:50.

Location detail: 289950.2

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: THE TW CORONA COMPRESSOR STATION 8 - SIX INCH DISCHARGE BLOWDOWN VALVE OPENED UNINTENTIONALLY AND BLEW GAS TO THE ATMOSPHERE. THE BLOW DOWN VALVE, SHAFER OPERATOR PILOT GAS LINE FROZE OFF, DUE TO SUB ZERO TEMPERATURES CAUSING A LOSS OF PILOT PRESSURE, WHICH HOLDS THE VALVE IN THE CLOSED POSITION.

PHMSA trend classification: significant incident, not serious.

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

PHMSA indexed costs: $365,386 reported total cost, $338,796.878 in 1984 dollars, $415,991.103 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.
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