# TRANSWESTERN PIPELINE COMPANY LLC — Gas transmission and gathering — incident on 2018-02-16 **Citation:** PHMSA Report 20180033 **Type / status:** incident / historical **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** 2018-02-16 **Published:** 2018-03-21 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. ## Document text 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. ## Provenance - Official: Yes - Source: - Source ID: `phmsa-pipeline-incidents` - SHA-256: `ed5f73dbf27af877c60c06bffdfa6f789671935a0773f2302037ff90b9f5f81a` - Retrieved: 2026-08-20T03:30:32.010Z - Exported: 2026-08-24T18:15:12.082Z - Document slug: `phmsa-incident-ee4dd6da3e1063c423d582eb` ### Source metadata ```json { "recordKind": "pipeline_incident", "datasetType": "gas_transmission_gathering", "datasetLabel": "Gas transmission and gathering", "datasetPeriod": "January 2010 to present", "report": { "number": "20180033", "supplementalNumber": "30642", "type": "SUPPLEMENTAL FINAL", "receivedDate": "2018-03-21", "receivedDateRaw": "3/21/2018" }, "operator": { "id": "19610", "name": "TRANSWESTERN PIPELINE COMPANY LLC" }, "incident": { "date": "2018-02-16", "dateRaw": "2/16/2018 12:18" }, "location": { "city": "GALLUP", "county": "MCKINLEY", "state": "NM", "postalCode": "87301", "latitude": 35.61948, "longitude": -108.55285, "type": "PIPELINE RIGHT-OF-WAY", "details": { "DESIGNATED_NAME": "MP 89" }, "facilityName": "NMBM154B" }, "cause": { "category": "MATERIAL FAILURE OF PIPE OR WELD", "details": { "CAUSE_DETAILS": "DESIGN-, CONSTRUCTION-, INSTALLATION-, OR FABRICATION-RELATED", "NARRATIVE": "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." } }, "consequences": { "fatalities": 0, "injuries": 0, "commodity": "NATURAL GAS", "release": "1047", "propertyDamage": 85000, "estimatedOperatorCost": 0, "estimatedEmergencyCost": 1000, "estimatedEnvironmentalCost": null, "ignition": "NO", "explosion": "NO", "evacuated": 0, "raw": { "FATAL": "0", "INJURE": "0", "UNINTENTIONAL_RELEASE": "1047", "EST_COST_PROP_DAMAGE": "85000", "PRPTY": "180145" } }, "provenance": { "viewId": "27nc-rsge", "viewUrl": "https://data.transportation.gov/api/views/27nc-rsge", "assetId": "2b05c2d8-d14a-4c56-ac1c-7d23a4bc31c8", "archiveFilename": "Gas Transmission & Gathering Incident Data - January 2010 to present.zip", "archiveSha256": "fe0b136ca4b00ac987a8bc2e195098accf910d97512c5fc3b59e62d9da5f674e", "memberPath": "incident_gas_transmission_gathering_jan2010_present.txt", "memberSha256": "b435f2a25718cf54c54e00294e6788c4f9c6860e02fb86355e75d294c243c4dd", "rowNumber": 997, "rowSha256": "6989d7d4f549101236f098c998ada92564f20996ce10fee144f96864cbb92522" }, "caveat": "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.", "operatorReported": true, "finalAgencyFinding": false, "flaggedAnalysis": { "dataAsOf": "2026-07-31", "flags": { "fireFirst": null, "significant": true, "serious": false }, "standardizedCause": { "sevenCategory": "MATERIAL/WELD/EQUIP FAILURE", "sevenSubcategory": "CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED", "eightCategory": "MATERIAL FAILURE OF PIPE OR WELD", "eightSubcategory": "CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED" }, "costs": { "reported": 180145, "in1984Dollars": 110749.76021644953, "currentYearDollars": 210307.70198657885 }, "caveat": "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.", "provenance": { "sourceUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/data_statistics/pipeline/PHMSA_Pipeline_Safety_Flagged_Incidents.zip", "landingPageUrl": "https://www.phmsa.dot.gov/data-and-statistics/pipeline/pipeline-incident-flagged-files", "catalogUrl": "https://data.transportation.gov/Pipelines-and-Hazmat/Pipeline-Incident-Flagged-Files/qdme-9bbm", "retrievalMode": "official_live", "archivedAt": null, "archiveSha256": "317e6a3e16d60b9b677efe391dc40258b5dd7ead83fb8bea74cb553cedfbbdec", "workbook": "gtggungs2010toPresent.xlsx", "sheet": "gtggungs2010toPresent", "rowNumber": 1000, "rowSha256": "f151aed675c3d45856d8e27fd4c4774615c0942a443ca0cd156667995c11b6e6" } }, "jurisdiction": "US", "operatorName": "TRANSWESTERN PIPELINE COMPANY LLC" } ```