SOUTHERN STAR CENTRAL GAS PIPELINE — Gas transmission and gathering — incident on 2005-06-30

Gas transmission and gathering incident in LAWRENCE, DOUGLAS County, KS. Reported cause: 23. Reported consequences: 0 fatalities, 0 injuries, $192,163 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: 20050077.

Operator ID: 31711.

Reported incident date: 6/30/2005.

Cause detail: INCORRECT OPERATION

Cause detail: ON JUNE 30TH AT APPROXIMATELY 7:52PM GAS CONTROL RECEIVED AN ALARM OF AN OVERPRESSURE SITUATION ON THE TOPEKA 20" AT OTTAWA STATION. OPERATIONS PERSONNEL WERE CONTACTED AT 8:05PM AND ARRIVED TO OTTAWA STATION AT 8:09PM AND FOUND LINE PRESSURE ON THE TOPEKA SYSTEM HAD EXCEEDED IT'S MAOP OF 450 PSIG DUE TO A LIGHTENING STORM CAUSING THE WORKING REGULATOR 1137 R TO FAIL OPEN. THE MONITOR REGULATOR 1137 RM FAILED TO OPERATE EXPOSING LINE ES TO A PRESSURE OF 679 PSIG. IT WAS LATER DETERMINED THE MONITOR REGULATOR FAILURE WAS DUE TO PNEUMATIC CONTROLLER'S SUPPLY VALVE BEING SHUT. AT 8:15 THE TOPEKA 20" RUPTURED APPROXIMATELY 3 MILES SOUTH OF LAWRENCE KANSAS. RICHARD HANES ARRIVED ON SITE OF RUPTURE AT 9:09PM, AND REPORTED THAT GAS WAS BLOWING AT MAINLINE PRESSURE AND THERE WAS NO FIRE. AT 9:42PM THE BALDWIN MAIN LINE GATE WAS CLOSED, SHUTTING IN THE RUPTURED SECTION. A CHECK VALVE AT HASKELL BOTTOMS NEAR LAWRENCE PREVENTED LOSS OF PRESSURE ELSEWHERE ON OUR SYSTEM.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: INCORRECT OPERATION — OTHER INCORRECT OPERATION.

PHMSA indexed costs: $192,163 reported total cost, $103,534.163 in 1984 dollars, $207,543.834 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.