AMEREN ILLINOIS COMPANY — Gas transmission and gathering — incident on 2015-07-17

Gas transmission and gathering incident in EDWARDSVILLE, MADISON County, IL. Reported cause: EXCAVATION DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 9180 NATURAL GAS released, $55,198 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: 20150103.

Operator ID: 32513.

Reported incident date: 7/17/2015 14:40.

Location detail: SEE PART A, 5

Cause detail: EXCAVATION DAMAGE BY THIRD PARTY

Cause detail: NOTIFICATION ISSUE

Cause detail: NO NOTIFICATION MADE TO THE ONE-CALL CENTER/811

Cause detail: AN 8" GAS TRANSMISSION MAIN SERVING DISTRIBUTION CUSTOMERS IN AND AROUND THE VICINITY OF EDWARDSVILLE, IL WAS DAMAGED BY A THIRD PARTY EXCAVATOR. THE EXCAVATOR MIKE MAEDGE TRUCKING, AN EARTHMOVING CONTRACTOR, WAS USING A JOHN DEERE 750J CRAWLER DOZER TO IMPROVE A HAUL ROAD FOR THE RICHARDS BRICK COMPANY. THE EXCAVATOR DID NOT REQUEST A DIG TICKET FROM JULIE, THE ONE CALL AGENCY IN ILLINOIS. THE EXCAVATOR REMOVED APPROXIMATELY 2 TO 3 FEET OF COVER, CREATING A GOUGE IN THE PIPELINE APPROXIMATELY 6" LONG BY 2" CIRCUMFERENTIALLY. THE LOCATION OF THE DAMAGE WAS IN A WOODED AREA ON AND ADJACENT TO THE RICHARDS BRICK COMPANY PROPERTY. GAS ESCAPED TO ATMOSPHERE AND DID NOT IGNITE. AMEREN ILLINOIS GAS CONTROL RECEIVED LOW PRESSURE ALARMS TO NEARBY REGULATOR STATIONS BEING FED FROM THIS 8" MAIN AND DISPATCHED GAS REGULATOR TECHNICIANS TO THESE LOCATIONS. ADDITIONAL GAS FIELD PERSONNEL WERE DISPATCHED AND CONFIRMED THE PIPELINE HIT HAD OCCURRED. AMEREN ILLINOIS SAFELY ISOLATED AND REPAIRED THE DAMAGED PIPELINE SEGMENT, MINIMIZING THE SCOPE OF THE OUTAGE WHICH ULTIMATELY IMPACTED AROUND 30 CUSTOMERS. UPDATE 01/29/2016 FOR FINAL SUBMISSION: GPS DATA WAS VERIFIED COST INFORMATION WAS UPDATED BASED ON FINAL COST ESTIMATE WHICH IS SPLIT INTO EMERGENCY RESPONSE AND DAMAGE REPAIR. ADDITIONAL DETAIL ON OUTAGE - TOTAL NUMBER OF CUSTOMERS IMPACTED WERE 32. SERVICE RESTORATION BEGAN ON SATURDAY JULY 18 AT 7:00 AM AND WAS COMPLETED BY 12:00 NOON ON SATURDAY JULY 18, FOR ALL CUSTOMERS EXCEPT 4 WHO WERE NOT HOME TO ALLOW ACCESS FOR RELIGHTS AT THIS TIME. THE EXCAVATOR STATED THAT SINCE THEY WERE GRADING DIRT, THAT THIS WAS NOT EXCAVATING AND THEREFORE DID NOT BELIEVED THEY NEEDED TO CONTACT THE ONE CALL CENTER FOR LOCATES. UPDATE 02/29/2016 FOR FINAL SUBMISSION: INITIAL TIME THAT THE INCIDENT ACTUALLY OCCURRED WAS UPDATED TO 14:40 PM, IN PART A, #4.

PHMSA trend classification: significant incident, not serious.

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

PHMSA indexed costs: $104,092 reported total cost, $69,350.125 in 1984 dollars, $124,697.805 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.