GULF SOUTH PIPELINE COMPANY, LP — Gas transmission and gathering — incident on 2018-04-05

Gas transmission and gathering incident in ROSENBERG, FORT BEND County, TX. Reported cause: OTHER INCIDENT CAUSE. Reported consequences: 0 fatalities, 0 injuries, 0 NATURAL GAS released, $563,250 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: 20180049.

Operator ID: 31728.

Reported incident date: 4/5/2018 10:05.

Location detail: 126

Cause detail: MISCELLANEOUS

Cause detail: PRIOR TO COMMISSIONING A NEW FACILITY, GULF SOUTH PIPELINE EMPLOYEES WERE CONDUCTING AN ESD TEST TO DETERMINE STATION BLOW DOWN TIME. DURING THE BLOW DOWN, THE STACK SUPPORTS FAILED CAUSING THE BLOW DOWN STACKS TO FAIL. THRUST FORCES ON THE BLOW DOWN STACKS DURING A BLOW-DOWN EVENT WERE NOT ADEQUATELY CONSIDERED DURING DESIGN OF THE BLOW DOWN STACKS.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: ALL OTHER CAUSES — MISCELLANEOUS.

PHMSA indexed costs: $564,341 reported total cost, $270,077.167 in 1984 dollars, $663,858.905 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.