# TRANSWESTERN PIPELINE COMPANY LLC — Gas transmission and gathering — incident on 2018-02-16

- **operation:** document
- **citation:** PHMSA Report 20180033
- **title:** TRANSWESTERN PIPELINE COMPANY LLC — Gas transmission and gathering — incident on 2018-02-16
- **source type:** incident
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2018-03-21
- **effective on:** 2018-02-16
- **summary:** Gas transmission and gathering incident in GALLUP, MCKINLEY County, NM. Reported cause: MATERIAL FAILURE OF PIPE OR WELD. Reported consequences: 0 fatalities, 0 injuries, 1047 NATURAL GAS released, $85,000 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 GALLUP, MCKINLEY County, NM. Reported cause: MATERIAL FAILURE OF PIPE OR WELD. Reported consequences: 0 fatalities, 0 injuries, 1047 NATURAL GAS released, $85,000 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: 20180033.

Operator ID: 19610.

Reported incident date: 2/16/2018 12:18.

Location detail: MP 89

Cause detail: DESIGN-, CONSTRUCTION-, INSTALLATION-, OR FABRICATION-RELATED

Cause detail: 2/16/18 12:18 GAS CONTROL RECEIVED NOTIFICATION FROM A LANDOWNER OF A POSSIBLE LEAK. 14:40 MCKINLEY COUNTY SHERIFF DEPARTMENT AND LANDOWNER WERE NOTIFIED OF BLOWDOWN. 16:21 THE AFFECTED LINE SEGMENT WAS ISOLATED AND BLOWN DOWN BETWEEN VALVE SECTIONS. 2/21/18 EXCAVATION OPERATIONS CONFIRMED LEAK SOURCE; CRACK IN GIRTH WELD. NRC TELEPHONIC NOTIFICATION MADE AT 17:02 NRC#1204895. PHMSA AID NOTIFIED. 2/23/18 48-HOUR UPDATE NRC NOTIFICATION MADE AT 11:24 NRC#1205058. PHMSA AID UPDATED. 3/1/18 REPAIRS COMPLETED, THE LINE WAS RETURNED TO SERVICE AT 12:00. 7/11/18 THIS SUPPLEMENTAL/FINAL REPORT UPDATES PART G APPARENT CAUSE. THE RESULTS OF THE METALLURGICAL ANALYSIS INDICATED THAT THE LEAK INITIATED AT A BOTTOM SIDE CRACK IN A GIRTH WELD. PART D - 7.D COST FOR THE METALLURGICAL ANALYSIS WAS ALSO UPDATED. 7/16/18 THIS SUPPLEMENTAL/FINAL REPORT UPDATES THE PART A #4 - TO 2/16/18 AT 12:18.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: MATERIAL FAILURE OF PIPE OR WELD — CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED.

PHMSA indexed costs: $180,145 reported total cost, $110,749.76 in 1984 dollars, $210,307.702 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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- **body characters:** 1969