GULF SOUTH PIPELINE COMPANY, LP — Gas transmission and gathering — incident on 2011-06-01

Gas transmission and gathering incident in JACKSON, HINDS County, MS. Reported cause: OTHER INCIDENT CAUSE. Reported consequences: 0 fatalities, 0 injuries, 227 NATURAL GAS released, $80,000 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: 20110211.

Operator ID: 31728.

Reported incident date: 6/1/2011 15:05.

Location detail: 070+60

Cause detail: UNKNOWN

Cause detail: GULF SOUTH WAS IN THE PROCESS OF PERFORMING A PIGGING PROJECT ON THE INDEX 301-18 CANTON 6" IN HINDS COUNTY, MISSISSIPPI, WHEN NOTIFICED OF A POSSIBLE LEAK ON THE PIPELINE SYSTEM AT WHITE OAK CREEK CROSSING. GULF SOUTH EMPLOYEES INVESTIGATED AND DETERMINED THAT THERE WAS A LEAK ON THE SYSTEM AND ISOLATED THE PIPELINE SEGMENT BY CLOSING BLOCK VALVES ON EACH SIDE OF THE INCIDENT LOCATION AND BLEW THE PIPELINE DOWN TO ZERO. A DETERMINATION WAS MADE TO INSTALL A NEW CROSSING DUE TO THE LEAK LOCATION WITHIN A DITCH EMBANKMENT. THE PIPELINE SECTION WITH THE LEAK WAS ABANDONED IN PLACE. THE NEW SECTION IS OPERATING NORMALLY.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: ALL OTHER CAUSES — UNKNOWN.

PHMSA indexed costs: $81,824 reported total cost, $44,155.017 in 1984 dollars, $107,333.242 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.