ATMOS ENERGY CORPORATION - MID-TEX — Gas transmission and gathering — incident on 2018-12-10

Gas transmission and gathering incident in RENO, PARKER County, TX. Reported cause: EXCAVATION DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 25 NATURAL GAS released, $75,000 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: 20190002.

Operator ID: 31348.

Reported incident date: 12/10/2018 19:00.

Location detail: 916+16

Cause detail: EXCAVATION DAMAGE BY THIRD PARTY

Cause detail: LOCATING ISSUE

Cause detail: FACILITY NOT MARKED DUE TO LOCATOR ERROR

Cause detail: ADDITIONAL NRC REPORT # 1232875 ON DECEMBER 10, 2018 AT 19:00, A THIRD PARTY CONTRACTOR HIT ATMOS ENERGY'S LINE CA, PUNCTURING THE LINE AND CAUSING A LEAK. THE LINE SEGMENT WAS ISOLATED AT 06:30 ON DECEMBER 11, 2018, AND A CONTROLLED GAS RELEASE WAS PERFORMED UNTIL LINE PRESSURE WAS ELIMINATED. AT THAT POINT, A TEN FOOT PIPE SEGMENT WAS REMOVED BY ATMOS ENERGY, AND APPROPRIATE REPAIRS WERE MADE. CNG RESOURCES WERE UTILIZED TO HOLD UP A SMALL RESIDENTIAL AREA AND SEVEN FARM TAP CUSTOMERS ON THE SEGMENT WERE OUT OF SERVICE DURING THE SHUTDOWN. SERVICE WAS RESTORED AT 20:30 ON DECEMBER 11, 2018. AFTER INVESTIGATION OF THE INCIDENT, IT WAS DETERMINED THAT CONTRACT LOCATOR DID NOT APPROPRIATELY MARK THE LINE.

PHMSA trend classification: not significant, not serious.

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

PHMSA indexed costs: $89,278 reported total cost, $43,829.839 in 1984 dollars, $104,949.402 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.