# PUBLIC SERVICE CO OF COLORADO — Gas transmission and gathering — incident on 2012-11-11

**Citation:** PHMSA Report 20120123  
**Type / status:** incident / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2012-11-11  
**Published:** 2012-12-11

Gas transmission and gathering incident in SILVERTHORNE, SUMMIT County, CO. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 3989 NATURAL GAS released, $51,786 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 SILVERTHORNE, SUMMIT County, CO. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 3989 NATURAL GAS released, $51,786 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: 20120123.

Operator ID: 15931.

Reported incident date: 11/11/2012 15:00.

Location detail: 3328+18.55

Cause detail: EXTERNAL CORROSION

Cause detail: ON 11/11/12 AT APPROXIMATELY 15:00 THERE WAS AN UNINTENTIONAL RELEASE OF 3,989 MCF (SEE PART A, #10) OF NATURAL GAS FROM AN 8 INCH STEEL TRANSMISSION LINE, OPERATING AT 752 PSIG. SERVICE WAS SHUT DOWN AT APPROXIMATELY 17:00 ON 11/11/12 AND RESTORED ON 11/12/12 AT APPROXIMATELY 09:00. THE RUPTURE WAS CAUSED BY EXTERNAL GALVANIC CORROSION ATTRIBUTED TO A COATING FLAW (A HOLIDAY OR DISBONDED REGION) THAT ERODED WALL THICKNESS BELOW THRESHOLD TO CONTAIN OPERATION PRESSURE.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: CORROSION — EXTERNAL.

PHMSA indexed costs: $67,786 reported total cost, $40,637.208 in 1984 dollars, $83,577.54 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: `bca82a3efab9661f4a9ca0c5c5879bb111b3df03b17ceadf562965eb75c4adb4`
- Retrieved: 2026-08-20T03:30:32.010Z
- Exported: 2026-08-25T16:40:05.568Z
- Document slug: `phmsa-incident-36229bd74a0815e60dd15014`

### Source metadata

```json
{
  "recordKind": "pipeline_incident",
  "datasetType": "gas_transmission_gathering",
  "datasetLabel": "Gas transmission and gathering",
  "datasetPeriod": "January 2010 to present",
  "report": {
    "number": "20120123",
    "supplementalNumber": "15894",
    "type": "SUPPLEMENTAL FINAL",
    "receivedDate": "2012-12-11",
    "receivedDateRaw": "12/11/2012"
  },
  "operator": {
    "id": "15931",
    "name": "PUBLIC SERVICE CO OF COLORADO"
  },
  "incident": {
    "date": "2012-11-11",
    "dateRaw": "11/11/2012 15:00"
  },
  "location": {
    "city": "SILVERTHORNE",
    "county": "SUMMIT",
    "state": "CO",
    "postalCode": "80498",
    "latitude": 39.85065,
    "longitude": -106.07956,
    "type": "PIPELINE RIGHT-OF-WAY",
    "details": {
      "DESIGNATED_NAME": "3328+18.55"
    },
    "facilityName": "8\" FRASER TO FRISCO \"A\""
  },
  "cause": {
    "category": "CORROSION FAILURE",
    "details": {
      "CAUSE_DETAILS": "EXTERNAL CORROSION",
      "NARRATIVE": "ON 11/11/12 AT APPROXIMATELY 15:00 THERE WAS AN UNINTENTIONAL RELEASE OF 3,989 MCF (SEE PART A, #10) OF NATURAL GAS FROM AN 8 INCH STEEL TRANSMISSION LINE, OPERATING AT 752 PSIG. SERVICE WAS SHUT DOWN AT APPROXIMATELY 17:00 ON 11/11/12 AND RESTORED ON 11/12/12 AT APPROXIMATELY 09:00. THE RUPTURE WAS CAUSED BY EXTERNAL GALVANIC CORROSION ATTRIBUTED TO A COATING FLAW (A HOLIDAY OR DISBONDED REGION) THAT ERODED WALL THICKNESS BELOW THRESHOLD TO CONTAIN OPERATION PRESSURE."
    }
  },
  "consequences": {
    "fatalities": 0,
    "injuries": 0,
    "commodity": "NATURAL GAS",
    "release": "3989",
    "propertyDamage": 51786,
    "estimatedOperatorCost": 0,
    "estimatedEmergencyCost": 0,
    "estimatedEnvironmentalCost": null,
    "ignition": "NO",
    "explosion": "NO",
    "evacuated": 0,
    "raw": {
      "FATAL": "0",
      "INJURE": "0",
      "UNINTENTIONAL_RELEASE": "3989",
      "EST_COST_PROP_DAMAGE": "51786",
      "PRPTY": "67786"
    }
  },
  "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": 1652,
    "rowSha256": "cfd0cccd18d8979593a901a4cf972955a35e9c38a8d402320ac5c6a141885596"
  },
  "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": "CORROSION",
      "sevenSubcategory": "EXTERNAL",
      "eightCategory": "CORROSION",
      "eightSubcategory": "EXTERNAL"
    },
    "costs": {
      "reported": 67786,
      "in1984Dollars": 40637.2083987315,
      "currentYearDollars": 83577.54026173362
    },
    "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": 339,
      "rowSha256": "592e9c5cd06b0ddb5356665e2a74efe51bba8fb8986036ad1f43b82f3eff40cc"
    }
  },
  "jurisdiction": "US",
  "operatorName": "PUBLIC SERVICE CO OF COLORADO"
}
```