PUBLIC SERVICE CO OF COLORADO — Gas transmission and gathering — incident on 2013-01-10

Gas transmission and gathering incident in LITTLETON, JEFFERSON County, CO. Reported cause: EXCAVATION DAMAGE. Reported consequences: 0 fatalities, 0 injuries, 676 NATURAL GAS released, $38,198 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: 20130013.

Operator ID: 15931.

Reported incident date: 1/10/2013 8:30.

Cause detail: EXCAVATION DAMAGE BY THIRD PARTY

Cause detail: LOCATING ISSUE

Cause detail: FACILITY NOT MARKED DUE TO LOCATOR ERROR

Cause detail: PINNACLE CONSTRUCTION WAS INSTALLING TELECOMMUNICATION FACILITIES WHEN THEY BORED INTO A 24 INCH HP GAS LINE. THE CONTRACTOR REQUESTED LOCATES; HOWEVER, XCEL ENERGY'S LOCATE CONTRACTOR, SAFE SITE, DID NOT MARK THE GAS FACILITIES WHERE THE DAMAGE OCCURRED. PLEASE NOTE THAT THE RESPONSE TO PART A QUESTION NUMBER 18 WAS DETERMINED DUE TO A REVERSE 911 CALL THAT WAS MADE TO APPROXIMATELY 2,500 PEOPLE; HOWEVER, THE ACTUAL NUMBER OF INDIVIDUALS EVACUATED IS UNKNOWN. PLEASE NOTE THAT THE RESPONSE TO PART C QUESTION NUMBER 3E WAS SELECTED BASED ON THE LIMITED INFORMATION THAT WE HAVE REGARDING THE SEAM TYPE. PLEASE NOTE PART D QUESTION 7B IS THE COST TO MAKE REPAIRS THAT WERE NECESSARY TO PLACE THE PIPELINE LINE BACK IN SERVICE. ADDITIONAL WORK, BOTH ENGINEERING AND FIELD, WILL NEED TO BE PERFORMED TO ENSURE THAT INTERNAL INSPECTION TOOLS CAN BE UTILIZED IN THE FUTURE. THIS WILL RESULT IN ADDITIONAL COSTS TO THE OPERATOR. A SUPPLEMENTAL FINAL REPORT WILL BE SUBMITTED WHEN THE TOTAL COSTS ASSOCIATED WITH THE DAMAGE AND REPAIRS HAVE BEEN COMPILED. PLEASE NOTE PART D QUESTION 7D IS THE ESTIMATED COST NECESSARY TO SAFELY RESTORE THE PIPELINE TO ITS PREDEFINED LEVEL OF SERVICE.

PHMSA trend classification: significant incident, not serious.

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

PHMSA indexed costs: $191,129 reported total cost, $99,638.393 in 1984 dollars, $242,710.99 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.