# EAST TENNESSEE NATURAL GAS, LLC (SPECTRA ENERGY PARTNERS, LP) — Gas transmission and gathering — incident on 2019-04-04 **Citation:** PHMSA Report 20190054 **Type / status:** incident / historical **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** 2019-04-04 **Published:** 2019-05-03 Gas transmission and gathering incident in OAK RIDGE, ANDERSON County, TN. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 3138 NATURAL GAS released, $1,000 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: not significant, not serious. ## Document text Gas transmission and gathering incident in OAK RIDGE, ANDERSON County, TN. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 3138 NATURAL GAS released, $1,000 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: 20190054. Operator ID: 4070. Reported incident date: 4/4/2019 21:17. Location detail: 9.377 Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT Cause detail: ORIGINAL REPORT: 48 HR NRC REPORT 1242022 AT APPROXIMATELY 9:17 PM EST ON APRIL 4, 2019, EAST TENNESSEE NATURAL GAS (ETNG) WAS NOTIFIED BY A UTILITY COMPANY EMPLOYEE ABOUT A NATURAL GAS RELEASE AT ETNG'S METER AND REGULATOR STATION (M&R 59021) IN ANDERSON COUNTY, TN. ETNG PERSONNEL ARRIVED AT M&R 59021 AT APPROXIMATELY 9:58 PM EST AND DISCOVERED NATURAL GAS RELEASE FROM A RELIEF VALVE. ETNG PERSONNEL SUBSEQUENTLY ISOLATED THE RELIEF VALVE. THE APPARENT CAUSE WAS A COLLAPSED SUPPLY GAS FILTER ON THE UPSTREAM REGULATOR THAT STOPPED THE SUPPLY GAS TO THE BOOT AND RESULTING IN THE REGULATOR TO FAIL OPEN. PHMSA trend classification: not significant, not serious. PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT. PHMSA indexed costs: $8,720 reported total cost, $8,472.227 in 1984 dollars, $10,981.197 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: `75295455a52c61f29a783d7cc84d043b02a04d16989d8328c08722278a8c8cb0` - Retrieved: 2026-08-20T03:30:32.010Z - Exported: 2026-08-25T21:53:41.806Z - Document slug: `phmsa-incident-fcd973d967aa05477fa7d6f4` ### Source metadata ```json { "recordKind": "pipeline_incident", "datasetType": "gas_transmission_gathering", "datasetLabel": "Gas transmission and gathering", "datasetPeriod": "January 2010 to present", "report": { "number": "20190054", "supplementalNumber": "32063", "type": "ORIGINAL FINAL", "receivedDate": "2019-05-03", "receivedDateRaw": "5/3/2019" }, "operator": { "id": "4070", "name": "EAST TENNESSEE NATURAL GAS, LLC (SPECTRA ENERGY PARTNERS, LP)" }, "incident": { "date": "2019-04-04", "dateRaw": "4/4/2019 21:17" }, "location": { "city": "OAK RIDGE", "county": "ANDERSON", "state": "TN", "postalCode": "37830", "latitude": 35.979805, "longitude": -84.228667, "type": "OPERATOR-CONTROLLED PROPERTY", "details": { "DESIGNATED_NAME": "9.377" }, "facilityName": "MR 59021" }, "cause": { "category": "EQUIPMENT FAILURE", "details": { "CAUSE_DETAILS": "MALFUNCTION OF CONTROL/RELIEF EQUIPMENT", "NARRATIVE": "ORIGINAL REPORT: 48 HR NRC REPORT 1242022 AT APPROXIMATELY 9:17 PM EST ON APRIL 4, 2019, EAST TENNESSEE NATURAL GAS (ETNG) WAS NOTIFIED BY A UTILITY COMPANY EMPLOYEE ABOUT A NATURAL GAS RELEASE AT ETNG'S METER AND REGULATOR STATION (M&R 59021) IN ANDERSON COUNTY, TN. ETNG PERSONNEL ARRIVED AT M&R 59021 AT APPROXIMATELY 9:58 PM EST AND DISCOVERED NATURAL GAS RELEASE FROM A RELIEF VALVE. ETNG PERSONNEL SUBSEQUENTLY ISOLATED THE RELIEF VALVE. THE APPARENT CAUSE WAS A COLLAPSED SUPPLY GAS FILTER ON THE UPSTREAM REGULATOR THAT STOPPED THE SUPPLY GAS TO THE BOOT AND RESULTING IN THE REGULATOR TO FAIL OPEN." } }, "consequences": { "fatalities": 0, "injuries": 0, "commodity": "NATURAL GAS", "release": "3138", "propertyDamage": 1000, "estimatedOperatorCost": 0, "estimatedEmergencyCost": 0, "estimatedEnvironmentalCost": null, "ignition": "NO", "explosion": "NO", "evacuated": 0, "raw": { "FATAL": "0", "INJURE": "0", "UNINTENTIONAL_RELEASE": "3138", "EST_COST_PROP_DAMAGE": "1000", "PRPTY": "8720" } }, "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": 851, "rowSha256": "355626ba93254b6ba6fb91dfaa824c181ac0563faf663aeec4eed1d3279697c7" }, "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": false, "serious": false }, "standardizedCause": { "sevenCategory": "MATERIAL/WELD/EQUIP FAILURE", "sevenSubcategory": "MALFUNCTION OF CONTROL/RELIEF EQUIPMENT", "eightCategory": "EQUIPMENT FAILURE", "eightSubcategory": "MALFUNCTION OF CONTROL/RELIEF EQUIPMENT" }, "costs": { "reported": 8720, "in1984Dollars": 8472.22716055609, "currentYearDollars": 10981.197486423083 }, "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": 1146, "rowSha256": "9e2ae1202697275fca5d28d1a5da5ae924922d2ee127daf992f0ab58099ab7f2" } }, "jurisdiction": "US", "operatorName": "EAST TENNESSEE NATURAL GAS, LLC (SPECTRA ENERGY PARTNERS, LP)" } ```