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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: 2001
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 24 10.3% 0 3 $8,052,213 10.5%
INTERNAL CORROSION 21 9.0% 0 0 $5,900,489 7.7%
UNSPECIFIED CORROSION 5 2.1% 0 1 $1,055,681 1.3%
Sub Total 50 21.4% 0 4 $15,008,385 19.6%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 6 2.5% 0 2 $3,272,697 4.2%
THIRD PARTY EXCAVATION DAMAGE 70 30.0% 1 19 $26,074,533 34.1%
Sub Total 76 32.6% 1 21 $29,347,230 38.4%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 10 4.2% 0 2 $774,831 1.0%
Sub Total 10 4.2% 0 2 $774,831 1.0%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED PIPE BODY OR SEAM 4 1.7% 0 0 $727,390 0.9%
UNSPECIFIED WELD 1 0.4% 0 0 $257,483 0.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 1 0.4% 0 0 $128,741 0.1%
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 13 5.5% 0 3 $2,210,585 2.9%
Sub Total 19 8.1% 0 3 $3,324,200 4.3%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 5 2.1% 0 11 $1,856,681 2.4%
TEMPERATURE 2 0.8% 0 1 $143,160 0.1%
UNSPECIFIED NATURAL FORCE DAMAGE 4 1.7% 0 0 $1,108,272 1.4%
Sub Total 11 4.7% 0 12 $3,108,115 4.0%
OTHER OUTSIDE FORCE DAMAGE
UNSPECIFIED OUTSIDE FORCE DAMAGE 8 3.4% 2 1 $7,007,590 9.1%
Sub Total 8 3.4% 2 1 $7,007,590 9.1%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 59 25.3% 4 18 $17,774,414 23.2%
Sub Total 59 25.3% 4 18 $17,774,414 23.2%
Totals 233 100.0% 7 61 $76,344,769 100.0%
National, All Pipeline Systems, 2001
National Hazardous Liquid: Significant Incident Details: 2001
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 17 15.7% 0 0 $5,346,900 16.9%
INTERNAL CORROSION 13 12.0% 0 0 $1,650,468 5.2%
UNSPECIFIED CORROSION 3 2.7% 0 0 $849,695 2.6%
Sub Total 33 30.5% 0 0 $7,847,063 24.8%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 1.8% 0 1 $2,614,743 8.2%
THIRD PARTY EXCAVATION DAMAGE 18 16.6% 0 1 $4,422,277 14.0%
Sub Total 20 18.5% 0 2 $7,037,021 22.2%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 9 8.3% 0 0 $774,831 2.4%
Sub Total 9 8.3% 0 0 $774,831 2.4%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED PIPE BODY OR SEAM 4 3.7% 0 0 $727,390 2.3%
UNSPECIFIED WELD 1 0.9% 0 0 $257,483 0.8%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 1 0.9% 0 0 $128,741 0.4%
Sub Total 6 5.5% 0 0 $1,113,615 3.5%
NATURAL FORCE DAMAGE
TEMPERATURE 1 0.9% 0 0 $141,615 0.4%
UNSPECIFIED NATURAL FORCE DAMAGE 2 1.8% 0 0 $20,405 0.0%
Sub Total 3 2.7% 0 0 $162,021 0.5%
OTHER OUTSIDE FORCE DAMAGE
UNSPECIFIED OUTSIDE FORCE DAMAGE 1 0.9% 0 0 $1,139,364 3.6%
Sub Total 1 0.9% 0 0 $1,139,364 3.6%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 36 33.3% 0 8 $13,516,772 42.7%
Sub Total 36 33.3% 0 8 $13,516,772 42.7%
Totals 108 100.0% 0 10 $31,590,690 100.0%
National, Hazardous Liquid, 2001
National Hazardous Liquid Onshore: Significant Incident Details: 2001
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 16 14.8% 0 0 $4,810,047 15.2%
INTERNAL CORROSION 13 12.0% 0 0 $1,650,468 5.2%
UNSPECIFIED CORROSION 3 2.7% 0 0 $849,695 2.6%
Sub Total 32 29.6% 0 0 $7,310,210 23.1%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 1.8% 0 1 $2,614,743 8.2%
THIRD PARTY EXCAVATION DAMAGE 18 16.6% 0 1 $4,422,277 14.0%
Sub Total 20 18.5% 0 2 $7,037,021 22.2%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 9 8.3% 0 0 $774,831 2.4%
Sub Total 9 8.3% 0 0 $774,831 2.4%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED PIPE BODY OR SEAM 4 3.7% 0 0 $727,390 2.3%
UNSPECIFIED WELD 1 0.9% 0 0 $257,483 0.8%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 1 0.9% 0 0 $128,741 0.4%
Sub Total 6 5.5% 0 0 $1,113,615 3.5%
NATURAL FORCE DAMAGE
TEMPERATURE 1 0.9% 0 0 $141,615 0.4%
UNSPECIFIED NATURAL FORCE DAMAGE 2 1.8% 0 0 $20,405 0.0%
Sub Total 3 2.7% 0 0 $162,021 0.5%
OTHER OUTSIDE FORCE DAMAGE
UNSPECIFIED OUTSIDE FORCE DAMAGE 1 0.9% 0 0 $1,139,364 3.6%
Sub Total 1 0.9% 0 0 $1,139,364 3.6%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 36 33.3% 0 8 $13,516,772 42.7%
Sub Total 36 33.3% 0 8 $13,516,772 42.7%
Totals 107 99.0% 0 10 $31,053,837 98.3%
National, Hazardous Liquid Onshore, 2001
National Hazardous Liquid Offshore: Significant Incident Details: 2001
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 1 0.9% 0 0 $536,852 1.7%
Sub Total 1 0.9% 0 0 $536,852 1.7%
Totals 1 0.9% 0 0 $536,852 1.7%
National, Hazardous Liquid Offshore, 2001
National Gas Transmission: Significant Incident Details: 2001
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 5 10.0% 0 0 $2,473,578 15.0%
INTERNAL CORROSION 5 10.0% 0 0 $1,675,186 10.1%
Sub Total 10 20.0% 0 0 $4,148,765 25.2%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 4.0% 0 0 $295,075 1.8%
THIRD PARTY EXCAVATION DAMAGE 12 24.0% 0 0 $5,941,300 36.1%
Sub Total 14 28.0% 0 0 $6,236,376 37.9%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 8 16.0% 0 0 $1,849,675 11.2%
Sub Total 8 16.0% 0 0 $1,849,675 11.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 1 2.0% 0 0 $324,655 1.9%
UNSPECIFIED NATURAL FORCE DAMAGE 2 4.0% 0 0 $1,087,867 6.6%
Sub Total 3 6.0% 0 0 $1,412,522 8.5%
OTHER OUTSIDE FORCE DAMAGE
UNSPECIFIED OUTSIDE FORCE DAMAGE 1 2.0% 0 0 $667,062 4.0%
Sub Total 1 2.0% 0 0 $667,062 4.0%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 14 28.0% 2 5 $2,120,530 12.9%
Sub Total 14 28.0% 2 5 $2,120,530 12.9%
Totals 50 100.0% 2 5 $16,434,933 100.0%
National, Gas Transmission, 2001
National Gas Transmission Onshore: Significant Incident Details: 2001
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 5 10.0% 0 0 $2,473,578 15.0%
INTERNAL CORROSION 3 6.0% 0 0 $1,307,822 7.9%
Sub Total 8 16.0% 0 0 $3,781,401 23.0%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 4.0% 0 0 $295,075 1.8%
THIRD PARTY EXCAVATION DAMAGE 11 22.0% 0 0 $5,130,227 31.2%
Sub Total 13 26.0% 0 0 $5,425,303 33.0%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 8 16.0% 0 0 $1,849,675 11.2%
Sub Total 8 16.0% 0 0 $1,849,675 11.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 1 2.0% 0 0 $324,655 1.9%
UNSPECIFIED NATURAL FORCE DAMAGE 1 2.0% 0 0 $733,827 4.4%
Sub Total 2 4.0% 0 0 $1,058,483 6.4%
OTHER OUTSIDE FORCE DAMAGE
UNSPECIFIED OUTSIDE FORCE DAMAGE 1 2.0% 0 0 $667,062 4.0%
Sub Total 1 2.0% 0 0 $667,062 4.0%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 13 26.0% 2 5 $1,798,676 10.9%
Sub Total 13 26.0% 2 5 $1,798,676 10.9%
Totals 45 90.0% 2 5 $14,580,602 88.7%
National, Gas Transmission Onshore, 2001
National Gas Transmission Offshore: Significant Incident Details: 2001
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
INTERNAL CORROSION 2 4.0% 0 0 $367,364 2.2%
Sub Total 2 4.0% 0 0 $367,364 2.2%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE 1 2.0% 0 0 $811,072 4.9%
Sub Total 1 2.0% 0 0 $811,072 4.9%
NATURAL FORCE DAMAGE
UNSPECIFIED NATURAL FORCE DAMAGE 1 2.0% 0 0 $354,039 2.1%
Sub Total 1 2.0% 0 0 $354,039 2.1%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 1 2.0% 0 0 $321,854 1.9%
Sub Total 1 2.0% 0 0 $321,854 1.9%
Totals 5 10.0% 0 0 $1,854,331 11.2%
National, Gas Transmission Offshore, 2001
National Gas Gathering: Significant Incident Details: 2001
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
INTERNAL CORROSION 3 50.0% 0 0 $2,574,833 20.4%
Sub Total 3 50.0% 0 0 $2,574,833 20.4%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE 2 33.3% 0 0 $9,888,134 78.5%
Sub Total 2 33.3% 0 0 $9,888,134 78.5%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 1 16.6% 0 0 $125,312 1.0%
Sub Total 1 16.6% 0 0 $125,312 1.0%
Totals 6 100.0% 0 0 $12,588,280 100.0%
National, Gas Gathering, 2001
National Gas Distribution: Significant Incident Details: 2001
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 2 2.9% 0 3 $231,735 1.4%
UNSPECIFIED CORROSION 2 2.9% 0 1 $205,986 1.3%
Sub Total 4 5.8% 0 4 $437,721 2.7%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 2.9% 0 1 $362,877 2.3%
THIRD PARTY EXCAVATION DAMAGE 38 55.0% 1 18 $5,822,820 37.0%
Sub Total 40 57.9% 1 19 $6,185,698 39.3%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 1 1.4% 0 2 $0 0.0%
Sub Total 1 1.4% 0 2 $0 0.0%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 4 5.8% 0 3 $235,597 1.5%
Sub Total 4 5.8% 0 3 $235,597 1.5%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 4 5.8% 0 11 $1,532,026 9.7%
TEMPERATURE 1 1.4% 0 1 $1,544 0.0%
Sub Total 5 7.2% 0 12 $1,533,571 9.7%
OTHER OUTSIDE FORCE DAMAGE
UNSPECIFIED OUTSIDE FORCE DAMAGE 6 8.7% 2 1 $5,201,164 33.0%
Sub Total 6 8.7% 2 1 $5,201,164 33.0%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 9 13.0% 2 5 $2,137,112 13.5%
Sub Total 9 13.0% 2 5 $2,137,112 13.5%
Totals 69 100.0% 5 46 $15,730,865 100.0%
National, Gas Distribution, 2001

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 - Aug 4, 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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