MARKWEST OKLAHOMA GAS COMPANY, LLC — Gas transmission and gathering — incident on 2016-05-09

Gas transmission and gathering incident in BENNINGTON, BRYAN County, OK. Reported cause: NATURAL FORCE DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 32.46 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: 20160046.

Operator ID: 32414.

Reported incident date: 5/9/2016 19:30.

Location detail: BENNINGTON

Cause detail: OTHER NATURAL FORCE DAMAGE

Cause detail: A TORNADO AFFECTED THE MEASUREMENT SKID AND BUILDING AT A DELIVERY POINT. THE DEBRIS IMPACT CAUSED A PLUG TO RELEASE GAS. THE SECTION WAS ISOLATED AND THE PLUG REPLACED. AFTER FURTHER INVESTIGATION THE NEXT DAY, THE COST OF THE MEASUREMENT BUILDING DAMAGE WAS ESTIMATED AT GREATER THAN $50,000 WHICH QUALIFIES AS AN INCIDENT AND THE TELEPHONIC NRC REPORT WAS FILED.

PHMSA trend classification: not significant, not serious.

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

PHMSA indexed costs: $89,758 reported total cost, $44,691.442 in 1984 dollars, $109,985.013 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.