ANR PIPELINE CO — Gas transmission and gathering — incident on 2013-12-02

Gas transmission and gathering incident in NEW LONDON, DES MOINES County, IA. Reported cause: EXCAVATION DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 110000 NATURAL GAS released, $255,000 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: 20140001.

Operator ID: 405.

Reported incident date: 12/2/2013 13:05.

Location detail: 0.01

Cause detail: EXCAVATION DAMAGE BY THIRD PARTY

Cause detail: LOCATING ISSUE

Cause detail: FACILITY NOT MARKED DUE TO INCOMPLETE MARKS AT DAMAGE LOCATION

Cause detail: A CONTRACTOR HIT THE ANR PIPELINE WHILE TILING IN THE FARMFIELD. ACCORDING THE INCIDENT ANALYSIS REPORT SUBMITTED EARLIER THIS YEAR THE CONTRACTOR DID UTILIZE THE ONE CALL SYSTEM BUT ALL THE LINES IN THE AREA WERE NOT MARKED. AT 13:05 THE CONTRACTOR CONTACTED ANR AND A TECHNICIAN ARRIVED AT THE SITE AROUND 13:45. THE SITE WAS SECURED BY WORKING WITH LOCAL EMERGENCY RESPONDERS AND ANR PERSONNEL. THE INVESTIGATION PROCESS BEGAN WHICH UTILIZED INFORMATION FROM GAS CONTROL AND A DECISION WAS MADE TO DROP THE PRESSURE TO 400 PSI. AFTER IT WAS SAFE TO APPROACH WHERE THE SOURCE OF THE RELEASE WAS LOCATED IT WAS CONFIRMED AT 22:40. PRESSURE WAS MAINTAINED AND SERVICE WAS CONTINUED ON THE PIPELINE. A SMALL HOLE/PUNCTURE 1/8" X 1/2" WAS DISCOVERED IN THE PIPELINE. SERVICE WAS MAINTAINED BY LNG DURING THE REPAIR PROCESS WHICH WAS A PIPE CUT OUT AND REPLACEMENT. REPAIR WAS MADE AND PIPE WAS PLACED BACK IN FULL SERVICE ON DECEMBER 14, 2013.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EXCAVATION DAMAGE — THIRD PARTY EXCAVATION DAMAGE.

PHMSA indexed costs: $400,000 reported total cost, $214,198.633 in 1984 dollars, $502,517.43 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.