WILLIAMS ENERGY, LLC — Gas transmission and gathering — incident on 2014-12-03

Gas transmission and gathering incident. Reported cause: OTHER OUTSIDE FORCE DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 11000 NATURAL GAS released, $2,733,406 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: 20140136.

Operator ID: 30940.

Reported incident date: 12/3/2014 15:00.

Cause detail: NEARBY INDUSTRIAL, MAN-MADE, OR OTHER FIRE/EXPLOSION AS PRIMARY CAUSE OF INCIDENT

Cause detail: A DIVE COMPANY WAS SETTING MATS TO COVER AND PROTECT A NEWLY INSTALLED VALVE ASSEMBLY ON THE DISCOVERY 18 INCH PIPELINE AT A DEPTH OF 230 FEET. AN UNEXPECTED CURRENT CAUSED THE MAT TO CATCH ON THE 2 INCH BY-PASS LINE WHICH DAMAGED THE PIPING AND CAUSED THE RELEASE. THE LINE WAS QUICKLY ISOLATED AND REPAIRED. THE DIVER WAS NOT INJURED AND THERE WAS NO OTHER DAMAGE AS A RESULT OF THIS INCIDENT. THERE WAS NO SHEEN REPORTED ON THE WATER. ADDITIONAL NRC NOTIFICATION WAS MADE BY WILLIAMS AT THE SAME TIME WITT O'BRIEN'S WAS MAKING NOTIFICATION. WILLIAMS NUMBER IS 1102550.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: OTHER OUTSIDE FORCE DAMAGE — FIRE/EXPLOSION AS PRIMARY CAUSE.

PHMSA indexed costs: $2,775,906 reported total cost, $1,416,379.886 in 1984 dollars, $3,451,803.114 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.