# ACADIAN GAS PIPELINE SYSTEM — Gas transmission and gathering — incident on 2014-02-27

**Citation:** PHMSA Report 20140033  
**Type / status:** incident / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2014-02-27  
**Published:** 2014-03-28

Gas transmission and gathering incident in GRAND BAYOU, ASSUMPTION PARISH County, LA. Reported cause: INCORRECT OPERATION. Reported consequences: 0 fatalities, 0 injuries, 0 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: not significant, not serious.

## Document text

Gas transmission and gathering incident in GRAND BAYOU, ASSUMPTION PARISH County, LA. Reported cause: INCORRECT OPERATION. Reported consequences: 0 fatalities, 0 injuries, 0 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: 20140033.

Operator ID: 3.

Reported incident date: 2/27/2014 9:25.

Location detail: 2436+21

Cause detail: OTHER INCORRECT OPERATION

Cause detail: THE 6 INCH CHICO B PIPELINE RELIEF VALVE OPENED TO ATMOSPHERE DUE TO THE CONTROLLER FAILING TO RESPOND TO HIGH PRESSURE ALARM. PIPELINE CONTROL FOLLOWED ESTABLISHED PROCEDURES TO EVALUATE THE CONTROLLER RESPONSE; THE CONTROLLER WAS RE-TRAINED AND RE-QUALIFIED TO PREVENT REOCCURRENCE. THE RELIEF VALVE FUNCTIONED PROPERLY OF WHICH RESULTED IN THE INTENTIONAL RELEASE TO THE ATMOSPHERE. PURSUANT TO OPERATOR JUDGMENT THAT IT WAS A SIGNIFICANT EVENT DUE TO THE SENSITIVITY OF THE CIRCUMSTANCE WHERE INCIDENT OCCURRED, THE NRC WAS NOTIFIED BASED ON THE INFORMATION AVAILABLE AT THE TIME.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: INCORRECT OPERATION — OTHER INCORRECT OPERATION.

PHMSA indexed costs: $29,769 reported total cost, $20,593.266 in 1984 dollars, $25,285.403 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: `25467e810517c47f509ebe5928ae2c4e868c162b1408343ed3b2bfca4875446a`
- Retrieved: 2026-08-20T03:30:32.010Z
- Exported: 2026-08-24T21:33:08.073Z
- Document slug: `phmsa-incident-9641d3c78b4c1a0c08a230ca`

### Source metadata

```json
{
  "recordKind": "pipeline_incident",
  "datasetType": "gas_transmission_gathering",
  "datasetLabel": "Gas transmission and gathering",
  "datasetPeriod": "January 2010 to present",
  "report": {
    "number": "20140033",
    "supplementalNumber": "16415",
    "type": "SUPPLEMENTAL FINAL",
    "receivedDate": "2014-03-28",
    "receivedDateRaw": "3/28/2014"
  },
  "operator": {
    "id": "3",
    "name": "ACADIAN GAS PIPELINE SYSTEM"
  },
  "incident": {
    "date": "2014-02-27",
    "dateRaw": "2/27/2014 9:25"
  },
  "location": {
    "city": "GRAND BAYOU",
    "county": "ASSUMPTION PARISH",
    "state": "LA",
    "postalCode": "70341",
    "latitude": 30.019769,
    "longitude": -91.137862,
    "type": "OPERATOR-CONTROLLED PROPERTY",
    "details": {
      "DESIGNATED_NAME": "2436+21"
    },
    "facilityName": "CHICO B"
  },
  "cause": {
    "category": "INCORRECT OPERATION",
    "details": {
      "CAUSE_DETAILS": "OTHER INCORRECT OPERATION",
      "NARRATIVE": "THE 6 INCH CHICO B PIPELINE RELIEF VALVE OPENED TO ATMOSPHERE DUE TO THE CONTROLLER FAILING TO RESPOND TO HIGH PRESSURE ALARM. PIPELINE CONTROL FOLLOWED ESTABLISHED PROCEDURES TO EVALUATE THE CONTROLLER RESPONSE; THE CONTROLLER WAS RE-TRAINED AND RE-QUALIFIED TO PREVENT REOCCURRENCE. THE RELIEF VALVE FUNCTIONED PROPERLY OF WHICH RESULTED IN THE INTENTIONAL RELEASE TO THE ATMOSPHERE. PURSUANT TO OPERATOR JUDGMENT THAT IT WAS A SIGNIFICANT EVENT DUE TO THE SENSITIVITY OF THE CIRCUMSTANCE WHERE INCIDENT OCCURRED, THE NRC WAS NOTIFIED BASED ON THE INFORMATION AVAILABLE AT THE TIME."
    }
  },
  "consequences": {
    "fatalities": 0,
    "injuries": 0,
    "commodity": "NATURAL GAS",
    "release": "0",
    "propertyDamage": 0,
    "estimatedOperatorCost": 0,
    "estimatedEmergencyCost": 0,
    "estimatedEnvironmentalCost": null,
    "ignition": "NO",
    "explosion": "NO",
    "evacuated": 0,
    "raw": {
      "FATAL": "0",
      "INJURE": "0",
      "UNINTENTIONAL_RELEASE": "0",
      "EST_COST_PROP_DAMAGE": "0",
      "PRPTY": "29769"
    }
  },
  "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": 1504,
    "rowSha256": "871ca111320ebc0c023b244a87d7b4a9f4fc1223a9a5d5ff433943517f6388d0"
  },
  "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": "INCORRECT OPERATION",
      "sevenSubcategory": "OTHER INCORRECT OPERATION",
      "eightCategory": "INCORRECT OPERATION",
      "eightSubcategory": "OTHER INCORRECT OPERATION"
    },
    "costs": {
      "reported": 29769,
      "in1984Dollars": 20593.266199649737,
      "currentYearDollars": 25285.402802101577
    },
    "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": 491,
      "rowSha256": "80faa7dc47bac266ce2ad924904e4306b9aad3356d42ee6aaec29468b35a5b8a"
    }
  },
  "jurisdiction": "US",
  "operatorName": "ACADIAN GAS PIPELINE SYSTEM"
}
```