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Significant Pipeline Incidents By Cause

This report is a sub-report of the PHMSA Significant Pipeline Incidents report. As such, it represents Significant Incidents (A) only over the time period and pipeline system specified.

The data source for this table is the PHMSA Flagged Incident File. (1)

More Pipeline Incidents Reports are available.

National All Pipeline Systems: Significant Incident Details: 2012
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 21 8.4% 0 2 $23,170,612 10.7%
INTERNAL CORROSION 44 17.7% 0 0 $33,154,023 15.3%
Sub Total 65 26.2% 0 2 $56,324,635 26.0%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 0.8% 0 0 $685,205 0.3%
THIRD PARTY EXCAVATION DAMAGE 21 8.4% 1 7 $13,251,138 6.1%
PREVIOUS DAMAGE DUE TO EXCAVATION 4 1.6% 0 4 $20,180,570 9.3%
Sub Total 27 10.8% 1 11 $34,116,914 15.7%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 3 1.2% 0 17 $1,529,805 0.7%
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 1 0.4% 0 0 $88,565 0.0%
INCORRECT VALVE POSITION 3 1.2% 0 0 $3,279,763 1.5%
PIPELINE/EQUIPMENT OVERPRESSURED 2 0.8% 0 0 $6,234,384 2.8%
INCORRECT INSTALLATION 1 0.4% 0 0 $670,417 0.3%
OTHER INCORRECT OPERATION 9 3.6% 0 1 $2,449,180 1.1%
Sub Total 19 7.6% 0 18 $14,252,117 6.5%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 15 6.0% 0 0 $3,723,750 1.7%
MANUFACTURING-RELATED 10 4.0% 0 0 $41,064,485 18.9%
ENVIRONMENTAL CRACKING-RELATED 3 1.2% 0 0 $1,339,600 0.6%
FUSION JOINT 1 0.4% 0 1 $73,331 0.0%
OTHER PIPE/WELD/JOINT FAILURE 1 0.4% 0 1 $24,961 0.0%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 9 3.6% 0 1 $1,075,022 0.5%
VALVE 1 0.4% 0 0 $367,536 0.1%
PUMP/COMPRESSOR-RELATED EQUIPMENT 15 6.0% 0 1 $2,687,313 1.2%
THREADED CONNECTION/COUPLING FAILURE 9 3.6% 0 0 $2,198,562 1.0%
NON-THREADED CONNECTION FAILURE 12 4.8% 0 0 $7,086,107 3.2%
DEFECTIVE OR LOOSE TUBING/FITTING 3 1.2% 0 0 $606,315 0.2%
OTHER EQUIPMENT FAILURE 6 2.4% 0 0 $4,322,121 2.0%
Sub Total 85 34.2% 0 4 $64,569,108 29.8%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 4 1.6% 0 0 $2,204,261 1.0%
HEAVY RAINS/FLOODS 1 0.4% 0 0 $1,028,771 0.4%
LIGHTNING 3 1.2% 0 1 $1,321,597 0.6%
TEMPERATURE 2 0.8% 0 0 $283,225 0.1%
OTHER NATURAL FORCE DAMAGE 3 1.2% 1 2 $1,636,326 0.7%
Sub Total 13 5.2% 1 3 $6,474,182 2.9%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 12 4.8% 6 9 $4,213,005 1.9%
MARITIME EQUIPMENT OR VESSEL ADRIFT 1 0.4% 0 0 $98,779 0.0%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 2 0.8% 0 0 $327,959 0.1%
PREVIOUS MECHANICAL DAMAGE 2 0.8% 0 0 $922,122 0.4%
INTENTIONAL DAMAGE 2 0.8% 1 2 $108,353 0.0%
OTHER OUTSIDE FORCE DAMAGE 5 2.0% 0 1 $27,454,327 12.6%
Sub Total 24 9.6% 7 12 $33,124,547 15.3%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 9 3.6% 0 0 $6,133,378 2.8%
UNKNOWN CAUSE 6 2.4% 1 5 $1,456,566 0.6%
Sub Total 15 6.0% 1 5 $7,589,945 3.5%
Totals 248 100.0% 10 55 $216,451,451 100.0%
National, All Pipeline Systems, 2012
National Hazardous Liquid: Significant Incident Details: 2012
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 11 8.5% 0 0 $20,795,723 14.8%
INTERNAL CORROSION 25 19.5% 0 0 $26,054,403 18.6%
Sub Total 36 28.1% 0 0 $46,850,126 33.5%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 0.7% 0 0 $41,217 0.0%
THIRD PARTY EXCAVATION DAMAGE 6 4.6% 0 0 $3,702,110 2.6%
PREVIOUS DAMAGE DUE TO EXCAVATION 2 1.5% 0 0 $19,438,704 13.9%
Sub Total 9 7.0% 0 0 $23,182,033 16.5%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 2 1.5% 0 0 $195,916 0.1%
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 1 0.7% 0 0 $88,565 0.0%
INCORRECT VALVE POSITION 2 1.5% 0 0 $225,123 0.1%
PIPELINE/EQUIPMENT OVERPRESSURED 2 1.5% 0 0 $6,234,384 4.4%
INCORRECT INSTALLATION 1 0.7% 0 0 $670,417 0.4%
OTHER INCORRECT OPERATION 4 3.1% 0 0 $1,558,208 1.1%
Sub Total 12 9.3% 0 0 $8,972,617 6.4%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 10 7.8% 0 0 $1,488,076 1.0%
MANUFACTURING-RELATED 7 5.4% 0 0 $38,964,125 27.8%
ENVIRONMENTAL CRACKING-RELATED 2 1.5% 0 0 $1,233,734 0.8%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 2 1.5% 0 0 $354,313 0.2%
PUMP/COMPRESSOR-RELATED EQUIPMENT 13 10.1% 0 0 $2,325,427 1.6%
THREADED CONNECTION/COUPLING FAILURE 6 4.6% 0 0 $391,935 0.2%
NON-THREADED CONNECTION FAILURE 11 8.5% 0 0 $5,550,015 3.9%
DEFECTIVE OR LOOSE TUBING/FITTING 3 2.3% 0 0 $606,315 0.4%
OTHER EQUIPMENT FAILURE 4 3.1% 0 0 $1,683,561 1.2%
Sub Total 58 45.3% 0 0 $52,597,506 37.6%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 1 0.7% 0 0 $176,146 0.1%
LIGHTNING 1 0.7% 0 0 $1,174,810 0.8%
TEMPERATURE 2 1.5% 0 0 $283,225 0.2%
Sub Total 4 3.1% 0 0 $1,634,182 1.1%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 2 1.5% 2 3 $2,910,482 2.0%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 1 0.7% 0 0 $114,174 0.0%
OTHER OUTSIDE FORCE DAMAGE 1 0.7% 0 0 $170,899 0.1%
Sub Total 4 3.1% 2 3 $3,195,557 2.2%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 3 2.3% 0 0 $3,203,694 2.2%
UNKNOWN CAUSE 2 1.5% 1 1 $159,505 0.1%
Sub Total 5 3.9% 1 1 $3,363,200 2.4%
Totals 128 100.0% 3 4 $139,795,223 100.0%
National, Hazardous Liquid, 2012
National Hazardous Liquid Onshore: Significant Incident Details: 2012
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 10 7.8% 0 0 $20,565,177 14.7%
INTERNAL CORROSION 25 19.5% 0 0 $26,054,403 18.6%
Sub Total 35 27.3% 0 0 $46,619,581 33.3%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 0.7% 0 0 $41,217 0.0%
THIRD PARTY EXCAVATION DAMAGE 6 4.6% 0 0 $3,702,110 2.6%
PREVIOUS DAMAGE DUE TO EXCAVATION 2 1.5% 0 0 $19,438,704 13.9%
Sub Total 9 7.0% 0 0 $23,182,033 16.5%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 2 1.5% 0 0 $195,916 0.1%
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 1 0.7% 0 0 $88,565 0.0%
INCORRECT VALVE POSITION 2 1.5% 0 0 $225,123 0.1%
PIPELINE/EQUIPMENT OVERPRESSURED 2 1.5% 0 0 $6,234,384 4.4%
INCORRECT INSTALLATION 1 0.7% 0 0 $670,417 0.4%
OTHER INCORRECT OPERATION 4 3.1% 0 0 $1,558,208 1.1%
Sub Total 12 9.3% 0 0 $8,972,617 6.4%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 10 7.8% 0 0 $1,488,076 1.0%
MANUFACTURING-RELATED 7 5.4% 0 0 $38,964,125 27.8%
ENVIRONMENTAL CRACKING-RELATED 2 1.5% 0 0 $1,233,734 0.8%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 2 1.5% 0 0 $354,313 0.2%
PUMP/COMPRESSOR-RELATED EQUIPMENT 13 10.1% 0 0 $2,325,427 1.6%
THREADED CONNECTION/COUPLING FAILURE 6 4.6% 0 0 $391,935 0.2%
NON-THREADED CONNECTION FAILURE 10 7.8% 0 0 $5,080,013 3.6%
DEFECTIVE OR LOOSE TUBING/FITTING 3 2.3% 0 0 $606,315 0.4%
OTHER EQUIPMENT FAILURE 4 3.1% 0 0 $1,683,561 1.2%
Sub Total 57 44.5% 0 0 $52,127,504 37.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 1 0.7% 0 0 $176,146 0.1%
LIGHTNING 1 0.7% 0 0 $1,174,810 0.8%
TEMPERATURE 2 1.5% 0 0 $283,225 0.2%
Sub Total 4 3.1% 0 0 $1,634,182 1.1%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 2 1.5% 2 3 $2,910,482 2.0%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 1 0.7% 0 0 $114,174 0.0%
Sub Total 3 2.3% 2 3 $3,024,657 2.1%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 3 2.3% 0 0 $3,203,694 2.2%
UNKNOWN CAUSE 2 1.5% 1 1 $159,505 0.1%
Sub Total 5 3.9% 1 1 $3,363,200 2.4%
Totals 125 97.6% 3 4 $138,923,776 99.3%
National, Hazardous Liquid Onshore, 2012
National Hazardous Liquid Offshore: Significant Incident Details: 2012
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 1 0.7% 0 0 $230,545 0.1%
Sub Total 1 0.7% 0 0 $230,545 0.1%
MAT'L/WELD/EQUIP FAILURE
NON-THREADED CONNECTION FAILURE 1 0.7% 0 0 $470,002 0.3%
Sub Total 1 0.7% 0 0 $470,002 0.3%
OTHER OUTSIDE FORCE DAMAGE
OTHER OUTSIDE FORCE DAMAGE 1 0.7% 0 0 $170,899 0.1%
Sub Total 1 0.7% 0 0 $170,899 0.1%
Totals 3 2.3% 0 0 $871,447 0.6%
National, Hazardous Liquid Offshore, 2012
National Gas Transmission: Significant Incident Details: 2012
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 7 11.4% 0 0 $2,129,016 4.2%
INTERNAL CORROSION 14 22.9% 0 0 $6,098,289 12.1%
Sub Total 21 34.4% 0 0 $8,227,305 16.3%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 1.6% 0 0 $643,987 1.2%
THIRD PARTY EXCAVATION DAMAGE 4 6.5% 0 2 $1,601,259 3.1%
PREVIOUS DAMAGE DUE TO EXCAVATION 1 1.6% 0 0 $556,046 1.1%
Sub Total 6 9.8% 0 2 $2,801,294 5.5%
INCORRECT OPERATION
OTHER INCORRECT OPERATION 2 3.2% 0 0 $272,786 0.5%
Sub Total 2 3.2% 0 0 $272,786 0.5%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 5 8.2% 0 0 $2,235,673 4.4%
MANUFACTURING-RELATED 3 4.9% 0 0 $2,100,359 4.1%
ENVIRONMENTAL CRACKING-RELATED 1 1.6% 0 0 $105,865 0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 5 8.2% 0 0 $613,785 1.2%
PUMP/COMPRESSOR-RELATED EQUIPMENT 2 3.2% 0 1 $361,886 0.7%
THREADED CONNECTION/COUPLING FAILURE 3 4.9% 0 0 $1,806,626 3.6%
OTHER EQUIPMENT FAILURE 2 3.2% 0 0 $2,638,560 5.2%
Sub Total 21 34.4% 0 1 $9,862,756 19.6%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 3 4.9% 0 0 $2,028,114 4.0%
Sub Total 3 4.9% 0 0 $2,028,114 4.0%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 1 1.6% 0 4 $58,012 0.1%
MARITIME EQUIPMENT OR VESSEL ADRIFT 1 1.6% 0 0 $98,779 0.2%
PREVIOUS MECHANICAL DAMAGE 1 1.6% 0 0 $305,875 0.6%
OTHER OUTSIDE FORCE DAMAGE 2 3.2% 0 0 $26,111,286 51.9%
Sub Total 5 8.2% 0 4 $26,573,952 52.8%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 2 3.2% 0 0 $188,796 0.3%
UNKNOWN CAUSE 1 1.6% 0 0 $294,822 0.5%
Sub Total 3 4.9% 0 0 $483,619 0.9%
Totals 61 100.0% 0 7 $50,249,829 100.0%
National, Gas Transmission, 2012
National Gas Transmission Onshore: Significant Incident Details: 2012
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 5 8.2% 0 0 $1,536,902 3.0%
INTERNAL CORROSION 3 4.9% 0 0 $1,643,145 3.2%
Sub Total 8 13.1% 0 0 $3,180,048 6.3%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 1.6% 0 0 $643,987 1.2%
THIRD PARTY EXCAVATION DAMAGE 4 6.5% 0 2 $1,601,259 3.1%
PREVIOUS DAMAGE DUE TO EXCAVATION 1 1.6% 0 0 $556,046 1.1%
Sub Total 6 9.8% 0 2 $2,801,294 5.5%
INCORRECT OPERATION
OTHER INCORRECT OPERATION 2 3.2% 0 0 $272,786 0.5%
Sub Total 2 3.2% 0 0 $272,786 0.5%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 4 6.5% 0 0 $1,038,891 2.0%
MANUFACTURING-RELATED 3 4.9% 0 0 $2,100,359 4.1%
ENVIRONMENTAL CRACKING-RELATED 1 1.6% 0 0 $105,865 0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 5 8.2% 0 0 $613,785 1.2%
PUMP/COMPRESSOR-RELATED EQUIPMENT 2 3.2% 0 1 $361,886 0.7%
THREADED CONNECTION/COUPLING FAILURE 3 4.9% 0 0 $1,806,626 3.6%
OTHER EQUIPMENT FAILURE 2 3.2% 0 0 $2,638,560 5.2%
Sub Total 20 32.7% 0 1 $8,665,974 17.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 3 4.9% 0 0 $2,028,114 4.0%
Sub Total 3 4.9% 0 0 $2,028,114 4.0%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 1 1.6% 0 4 $58,012 0.1%
MARITIME EQUIPMENT OR VESSEL ADRIFT 1 1.6% 0 0 $98,779 0.2%
PREVIOUS MECHANICAL DAMAGE 1 1.6% 0 0 $305,875 0.6%
OTHER OUTSIDE FORCE DAMAGE 2 3.2% 0 0 $26,111,286 51.9%
Sub Total 5 8.2% 0 4 $26,573,952 52.8%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 2 3.2% 0 0 $188,796 0.3%
UNKNOWN CAUSE 1 1.6% 0 0 $294,822 0.5%
Sub Total 3 4.9% 0 0 $483,619 0.9%
Totals 47 77.0% 0 7 $44,005,790 87.5%
National, Gas Transmission Onshore, 2012
National Gas Transmission Offshore: Significant Incident Details: 2012
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 2 3.2% 0 0 $592,113 1.1%
INTERNAL CORROSION 11 18.0% 0 0 $4,455,143 8.8%
Sub Total 13 21.3% 0 0 $5,047,257 10.0%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 1 1.6% 0 0 $1,196,782 2.3%
Sub Total 1 1.6% 0 0 $1,196,782 2.3%
Totals 14 22.9% 0 0 $6,244,039 12.4%
National, Gas Transmission Offshore, 2012
National Gas Gathering: Significant Incident Details: 2012
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
INTERNAL CORROSION 5 71.4% 0 0 $1,001,330 34.1%
Sub Total 5 71.4% 0 0 $1,001,330 34.1%
MAT'L/WELD/EQUIP FAILURE
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 1 14.2% 0 0 $104,379 3.5%
Sub Total 1 14.2% 0 0 $104,379 3.5%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 1 14.2% 0 0 $1,823,000 62.2%
Sub Total 1 14.2% 0 0 $1,823,000 62.2%
Totals 7 100.0% 0 0 $2,928,710 100.0%
National, Gas Gathering, 2012
National Gas Distribution: Significant Incident Details: 2012
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 3 5.7% 0 2 $245,872 1.0%
Sub Total 3 5.7% 0 2 $245,872 1.0%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE 11 21.1% 1 5 $7,947,767 33.8%
PREVIOUS DAMAGE DUE TO EXCAVATION 1 1.9% 0 4 $185,819 0.7%
Sub Total 12 23.0% 1 9 $8,133,586 34.6%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 1 1.9% 0 17 $1,333,888 5.6%
INCORRECT VALVE POSITION 1 1.9% 0 0 $3,054,640 13.0%
OTHER INCORRECT OPERATION 3 5.7% 0 1 $618,184 2.6%
Sub Total 5 9.6% 0 18 $5,006,713 21.3%
MAT'L/WELD/EQUIP FAILURE
FUSION JOINT 1 1.9% 0 1 $73,331 0.3%
OTHER PIPE/WELD/JOINT FAILURE 1 1.9% 0 1 $24,961 0.1%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 1 1.9% 0 1 $2,545 0.0%
VALVE 1 1.9% 0 0 $367,536 1.5%
NON-THREADED CONNECTION FAILURE 1 1.9% 0 0 $1,536,091 6.5%
Sub Total 5 9.6% 0 3 $2,004,466 8.5%
NATURAL FORCE DAMAGE
HEAVY RAINS/FLOODS 1 1.9% 0 0 $1,028,771 4.3%
LIGHTNING 2 3.8% 0 1 $146,787 0.6%
OTHER NATURAL FORCE DAMAGE 3 5.7% 1 2 $1,636,326 6.9%
Sub Total 6 11.5% 1 3 $2,811,885 11.9%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 9 17.3% 4 2 $1,244,510 5.3%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 1 1.9% 0 0 $213,785 0.9%
PREVIOUS MECHANICAL DAMAGE 1 1.9% 0 0 $616,247 2.6%
INTENTIONAL DAMAGE 2 3.8% 1 2 $108,353 0.4%
OTHER OUTSIDE FORCE DAMAGE 2 3.8% 0 1 $1,172,141 4.9%
Sub Total 15 28.8% 5 5 $3,355,037 14.2%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 3 5.7% 0 0 $917,886 3.9%
UNKNOWN CAUSE 3 5.7% 0 4 $1,002,238 4.2%
Sub Total 6 11.5% 0 4 $1,920,125 8.1%
Totals 52 100.0% 7 44 $23,477,688 100.0%
National, Gas Distribution, 2012

Notes

  1. Significant Incidents are those incidents reported by pipeline operators when any of the following conditions are met: 1) Fatality or injury requiring in-patient hospitalization. 2) $50,000 or more in total costs, measured in 1984 dollars. 3) Highly volatile liquid releases of 5 barrels or more or other liquid releases of 50 barrels or more. 4) Liquid releases resulting in an unintentional fire or explosion. Serious incidents, a subset of Significant Incidents, are incidents which involve a fatality or injury requiring in-patient hospitalization.
  2. PHMSA has gathered increasingly targeted incident cause data over time. As such, the available reportable categories of cause (eg: Internal/External Corrosion vs Corrosion in general) have increased over time. This report spans time periods over which the reportable cause categories have changed. The cause categories in this report should be taken as general and not specific for years prior to 2002 for Liquid and Gas Transmission, and prior to 2004 for Gas Distribution.
  3. Gas Distribution incidents where fire/explosion was the primary cause of failure, such as a house fire that subsequently resulted in - but was not caused by - a distribution line failure are excluded from 2004 onward. This exclusion has not been applied in years prior to 2004 due to difficulty in identifying these types of events with the older report formats.
  4. The costs for incidents in 2013 and prior are presented in 2013 dollars. Cost of Gas lost is indexed via the Energy Information Administration, Natural Gas City Gate Prices. All other costs are adjusted via the Bureau of Economic Analysis, Government Printing Office inflation values.
  5. For years 2002 and later, property damage is estimated as the sum of all public and private costs reported in the 30-day incident report. For years prior to 2002, accident report forms did not include a breakdown of public and private costs so property damage for these years is the reported total property damage field in the report.

Sources

  1. PHMSA Flagged Incidents File - Sept 3, 2014. Note: Incidents occurring up to 30 days prior the Incident File source date may not appear in these reports due to the 30-day reporting period allowed by PHMSA regulation.

See Pipeline Incidents Reports for more pipeline safety reports.

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