ONEOK GAS TRANSPORTATION, LLC — Gas transmission and gathering — incident on 2011-05-24

Current as of 2011-05-24 Government source

Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

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Gas transmission and gathering incident in CALUMET, CANADIAN County, OK. Reported cause: NATURAL FORCE DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 41240 NATURAL GAS released, $1,572,052 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: 20110200.

Operator ID: 31286.

Reported incident date: 5/24/2011 16:00.

Cause detail: OTHER NATURAL FORCE DAMAGE

Cause detail: AN EF-5 TORNADO CAME THROUGH THE ONEOK GAS TRANSPORTATION'S DEVON CANA MEASUREMENT FACILITY LOCATED SOUTH OF CALUMET OKLAHOMA AT APPROXIMATELY 1600 HOURS ON 24MAY2011. A ONEOK EMPLOYEE DISCOVERED LEAKING GAS AND DAMAGE AT THE DEVON CANA MEASUREMENT FACILITY JUST AFTER THE TORNADO STRUCK. FURTHER VISUAL FIELD INVESTIGATION REVEALED SUBSTANTIAL DAMAGE TO THE ENTIRE FACILITY. THE OKLAHOMA CORPORATION COMMISSION AND PHMSA WERE NOTIFED OF THE INCIDENT ON 24MAY2011. APPROXIMATELY 14 MILES OF THE A-1129 24INCH MAINLINE WAS ISOLATED AND BLOWN DOWN ALONG WITH THE DEVON CANA MEASUREMENT FACITLITES BY 2046 HOURS ON 24MAY2011. INITIAL EMERGENCY REPAIRS ISOLATED THE DEVON CANA MEASURMENT FACILITIES FROM THE A-1129 MAINLINE WHICH ALLOWED THE MAINLINE TO BE PLACED BACK IN SERVICE ON 26MAY2011. FITNESS FOR SERVICE ASSESSMENTS OF THE DEVON CANA FACILITY EQUIPMENT AND PIPING ARE CONTINUING. THE DEVON CANA MEASUREMENT FACILITIES WERE REBUILT ENTIRELY. THE FACILITY WAS READY FOR SERVICE ON 19OCT2011.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: NATURAL FORCE DAMAGE — OTHER NATURAL FORCE DAMAGE.

PHMSA indexed costs: $1,778,769 reported total cost, $984,853.052 in 1984 dollars, $2,263,894.351 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.

This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.