# ENTERPRISE PRODUCTS OPERATING LLC — Gas transmission and gathering — incident on 2012-05-18

**Citation:** PHMSA Report 20120063  
**Type / status:** incident / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2012-05-18  
**Published:** 2012-06-15

Gas transmission and gathering incident in COYANOSA, PECOS County, TX. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 9000 NATURAL GAS released, $2,000 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 COYANOSA, PECOS County, TX. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 9000 NATURAL GAS released, $2,000 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: 20120063.

Operator ID: 31618.

Reported incident date: 5/18/2012 17:30.

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: THE CONTROLLER FOR THE DUMP VALVE ON THE SOUTH INLET SCRUBBER FOR THE DELAVAL COMPRESSORS (WAHA 2) FAILED. THIS CAUSED THE DUMP VALVE TO GO TO THE OPEN POSITION AND RELEASED SWEET GAS TO THE SLOP TANKS AND VENTED TO THE ATMOSPHERE. ESTIMATED LOSS OF GAS IS 9 MMCF. THE INCIDENT WAS DISCOVERED ON 5-21-12 AT 8:45AM BY AN ENTERPRISE MEASUREMENT TECH AND THE SYSTEM WAS BLOCKED BY 9:00 AM BY THE ENTERPRISE I&E TECH. THE MEASUREMENT TECH ESTIMATED THE LOSS AT 9 MCCF BY 10:00 AM AND IMMEDIATELY NOTIFIED HIS IMMEDIATE SUPERVISOR AND THE PIPELINE MANAGER.

PHMSA trend classification: not significant, not serious.

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

PHMSA indexed costs: $24,547 reported total cost, $19,882.29 in 1984 dollars, $25,713.217 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: <https://data.transportation.gov/api/views/27nc-rsge/files/2b05c2d8-d14a-4c56-ac1c-7d23a4bc31c8?download=true&filename=Gas%20Transmission%20%26%20Gathering%20Incident%20Data%20-%20January%202010%20to%20present.zip>
- Source ID: `phmsa-pipeline-incidents`
- SHA-256: `f99a3b87cad7c980549270bd4ba9ea25e5816f6330e83c1a23108fb92c82c2bf`
- Retrieved: 2026-08-20T03:30:32.010Z
- Exported: 2026-08-27T08:46:14.723Z
- Document slug: `phmsa-incident-16aa542493d377f1adf7a95d`

### Source metadata

```json
{
  "recordKind": "pipeline_incident",
  "datasetType": "gas_transmission_gathering",
  "datasetLabel": "Gas transmission and gathering",
  "datasetPeriod": "January 2010 to present",
  "report": {
    "number": "20120063",
    "supplementalNumber": "16207",
    "type": "SUPPLEMENTAL FINAL",
    "receivedDate": "2012-06-15",
    "receivedDateRaw": "6/15/2012"
  },
  "operator": {
    "id": "31618",
    "name": "ENTERPRISE PRODUCTS OPERATING LLC"
  },
  "incident": {
    "date": "2012-05-18",
    "dateRaw": "5/18/2012 17:30"
  },
  "location": {
    "city": "COYANOSA",
    "county": "PECOS",
    "state": "TX",
    "postalCode": "79730",
    "latitude": 31.27,
    "longitude": -103.08361,
    "type": "OPERATOR-CONTROLLED PROPERTY",
    "details": {},
    "facilityName": "WAHA COMPRESSOR STATION"
  },
  "cause": {
    "category": "EQUIPMENT FAILURE",
    "details": {
      "CAUSE_DETAILS": "MALFUNCTION OF CONTROL/RELIEF EQUIPMENT",
      "NARRATIVE": "THE CONTROLLER FOR THE DUMP VALVE ON THE SOUTH INLET SCRUBBER FOR THE DELAVAL COMPRESSORS (WAHA 2) FAILED. THIS CAUSED THE DUMP VALVE TO GO TO THE OPEN POSITION AND RELEASED SWEET GAS TO THE SLOP TANKS AND VENTED TO THE ATMOSPHERE. ESTIMATED LOSS OF GAS IS 9 MMCF. THE INCIDENT WAS DISCOVERED ON 5-21-12 AT 8:45AM BY AN ENTERPRISE MEASUREMENT TECH AND THE SYSTEM WAS BLOCKED BY 9:00 AM BY THE ENTERPRISE I&E TECH. THE MEASUREMENT TECH ESTIMATED THE LOSS AT 9 MCCF BY 10:00 AM AND IMMEDIATELY NOTIFIED HIS IMMEDIATE SUPERVISOR AND THE PIPELINE MANAGER."
    }
  },
  "consequences": {
    "fatalities": 0,
    "injuries": 0,
    "commodity": "NATURAL GAS",
    "release": "9000",
    "propertyDamage": 2000,
    "estimatedOperatorCost": 0,
    "estimatedEmergencyCost": 0,
    "estimatedEnvironmentalCost": null,
    "ignition": "NO",
    "explosion": "NO",
    "evacuated": 0,
    "raw": {
      "FATAL": "0",
      "INJURE": "0",
      "UNINTENTIONAL_RELEASE": "9000",
      "EST_COST_PROP_DAMAGE": "2000",
      "PRPTY": "24547"
    }
  },
  "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": 1709,
    "rowSha256": "c3e6acbf624ddd3228e3540c6377afd898d0f746d28034995f78c8409b2540dd"
  },
  "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": 24547,
      "in1984Dollars": 19882.290063424945,
      "currentYearDollars": 25713.21691331924
    },
    "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": 284,
      "rowSha256": "3e887d0d9fa2798730d4bc2137558e98324e138520ecaa95a77e5023a0123fad"
    }
  },
  "jurisdiction": "US",
  "operatorName": "ENTERPRISE PRODUCTS OPERATING LLC"
}
```