ANR PIPELINE CO — Gas transmission and gathering — incident on 2013-06-18

Gas transmission and gathering incident in CHANNAHON, WILL County, IL. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 91400 NATURAL GAS released, $5,980 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: 20130068.

Operator ID: 405.

Reported incident date: 6/18/2013 11:00.

Location detail: 819

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: THE GEARHEAD ADAPTOR ON THE STATION BLOCK VALVE DID NOT FULLY CLOSE AND GAS CONTROL SCREEN TEMPLATE DID NOT PICK IT UP. THE AIR COMPRESSOR THAT SUPPLIED THE GAS TO BLOCK VALVE FAILED AND GAS CONTROL DID NOT SEE THAT FUNCTION. A FOLLOW UP INVESTIGATION WAS FORWARDED TO THE PHMSA CENTRAL REGION OFFICE. THE FAILED BLOCK VALVE HAS BEEN REPAIRED AND BOTH AIR COMPRESSORS ARE BACK IN NORMAL SERVICE. ALL OPERATIONS ARE BACK IN NORMAL SERVICE AT THE COMPRESSOR STATION.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $58,653 reported total cost, $42,025.026 in 1984 dollars, $63,514.097 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.