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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: 1999
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 20 7.2% 1 5 $3,968,641 2.3%
INTERNAL CORROSION 16 5.8% 0 0 $4,684,629 2.7%
UNSPECIFIED CORROSION 4 1.4% 0 2 $981,426 0.5%
Sub Total 40 14.5% 1 7 $9,634,697 5.6%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 6 2.1% 0 2 $2,428,828 1.4%
THIRD PARTY EXCAVATION DAMAGE 66 24.0% 16 33 $38,208,583 22.2%
UNSPECIFIED EXCAVATION DAMAGE 2 0.7% 0 0 $436,936 0.2%
Sub Total 74 26.9% 16 35 $41,074,348 23.8%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 23 8.3% 0 15 $5,041,146 2.9%
Sub Total 23 8.3% 0 15 $5,041,146 2.9%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED PIPE BODY OR SEAM 3 1.0% 0 0 $6,943,926 4.0%
UNSPECIFIED WELD 12 4.3% 0 0 $3,960,659 2.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 7 2.5% 0 0 $151,247 0.0%
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 9 3.2% 0 2 $9,356,890 5.4%
Sub Total 31 11.2% 0 2 $20,412,724 11.8%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 4 1.4% 0 8 $1,214,010 0.7%
TEMPERATURE 2 0.7% 0 2 $67,220 0.0%
UNSPECIFIED NATURAL FORCE DAMAGE 3 1.0% 0 0 $5,774,281 3.3%
Sub Total 9 3.2% 0 10 $7,055,513 4.1%
OTHER OUTSIDE FORCE DAMAGE
UNSPECIFIED OUTSIDE FORCE DAMAGE 8 2.9% 1 0 $1,121,245 0.6%
Sub Total 8 2.9% 1 0 $1,121,245 0.6%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 90 32.7% 4 39 $87,614,578 50.9%
Sub Total 90 32.7% 4 39 $87,614,578 50.9%
Totals 275 100.0% 22 108 $171,954,255 100.0%
National, All Pipeline Systems, 1999
National Hazardous Liquid: Significant Incident Details: 1999
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 14 9.5% 0 2 $3,183,500 2.7%
INTERNAL CORROSION 9 6.1% 0 0 $367,698 0.3%
UNSPECIFIED CORROSION 1 0.6% 0 0 $67,220 0.0%
Sub Total 24 16.3% 0 2 $3,618,420 3.1%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 4 2.7% 0 0 $2,294,386 1.9%
THIRD PARTY EXCAVATION DAMAGE 21 14.2% 1 0 $12,328,326 10.7%
Sub Total 25 17.0% 1 0 $14,622,713 12.7%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 14 9.5% 0 4 $4,338,015 3.7%
Sub Total 14 9.5% 0 4 $4,338,015 3.7%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED PIPE BODY OR SEAM 3 2.0% 0 0 $6,943,926 6.0%
UNSPECIFIED WELD 12 8.1% 0 0 $3,960,659 3.4%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 7 4.7% 0 0 $151,247 0.1%
Sub Total 22 14.9% 0 0 $11,055,833 9.6%
NATURAL FORCE DAMAGE
UNSPECIFIED NATURAL FORCE DAMAGE 2 1.3% 0 0 $396,603 0.3%
Sub Total 2 1.3% 0 0 $396,603 0.3%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 60 40.8% 3 14 $81,100,816 70.4%
Sub Total 60 40.8% 3 14 $81,100,816 70.4%
Totals 147 100.0% 4 20 $115,132,402 100.0%
National, Hazardous Liquid, 1999
National Hazardous Liquid Onshore: Significant Incident Details: 1999
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 14 9.5% 0 2 $3,183,500 2.7%
INTERNAL CORROSION 9 6.1% 0 0 $367,698 0.3%
UNSPECIFIED CORROSION 1 0.6% 0 0 $67,220 0.0%
Sub Total 24 16.3% 0 2 $3,618,420 3.1%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 3 2.0% 0 0 $949,966 0.8%
THIRD PARTY EXCAVATION DAMAGE 21 14.2% 1 0 $12,328,326 10.7%
Sub Total 24 16.3% 1 0 $13,278,293 11.5%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 14 9.5% 0 4 $4,338,015 3.7%
Sub Total 14 9.5% 0 4 $4,338,015 3.7%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED PIPE BODY OR SEAM 3 2.0% 0 0 $6,943,926 6.0%
UNSPECIFIED WELD 12 8.1% 0 0 $3,960,659 3.4%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 7 4.7% 0 0 $151,247 0.1%
Sub Total 22 14.9% 0 0 $11,055,833 9.6%
NATURAL FORCE DAMAGE
UNSPECIFIED NATURAL FORCE DAMAGE 2 1.3% 0 0 $396,603 0.3%
Sub Total 2 1.3% 0 0 $396,603 0.3%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 56 38.1% 3 14 $79,920,415 69.4%
Sub Total 56 38.1% 3 14 $79,920,415 69.4%
Totals 142 96.6% 4 20 $112,607,583 97.8%
National, Hazardous Liquid Onshore, 1999
National Hazardous Liquid Offshore: Significant Incident Details: 1999
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 0.6% 0 0 $1,344,419 1.1%
Sub Total 1 0.6% 0 0 $1,344,419 1.1%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 4 2.7% 0 0 $1,180,400 1.0%
Sub Total 4 2.7% 0 0 $1,180,400 1.0%
Totals 5 3.4% 0 0 $2,524,819 2.1%
National, Hazardous Liquid Offshore, 1999
National Gas Transmission: Significant Incident Details: 1999
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 2 5.2% 0 0 $564,656 2.4%
INTERNAL CORROSION 6 15.7% 0 0 $3,980,826 17.4%
Sub Total 8 21.0% 0 0 $4,545,482 19.9%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE 9 23.6% 1 2 $1,352,867 5.9%
UNSPECIFIED EXCAVATION DAMAGE 2 5.2% 0 0 $436,936 1.9%
Sub Total 11 28.9% 1 2 $1,789,804 7.8%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 6 15.7% 0 0 $8,785,512 38.4%
Sub Total 6 15.7% 0 0 $8,785,512 38.4%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 2 5.2% 0 0 $440,969 1.9%
UNSPECIFIED NATURAL FORCE DAMAGE 1 2.6% 0 0 $5,377,678 23.5%
Sub Total 3 7.8% 0 0 $5,818,647 25.4%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 10 26.3% 1 6 $1,903,361 8.3%
Sub Total 10 26.3% 1 6 $1,903,361 8.3%
Totals 38 100.0% 2 8 $22,842,808 100.0%
National, Gas Transmission, 1999
National Gas Transmission Onshore: Significant Incident Details: 1999
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 2 5.2% 0 0 $564,656 2.4%
INTERNAL CORROSION 3 7.8% 0 0 $3,106,953 13.6%
Sub Total 5 13.1% 0 0 $3,671,609 16.0%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE 8 21.0% 1 2 $1,151,204 5.0%
UNSPECIFIED EXCAVATION DAMAGE 2 5.2% 0 0 $436,936 1.9%
Sub Total 10 26.3% 1 2 $1,588,141 6.9%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 6 15.7% 0 0 $8,785,512 38.4%
Sub Total 6 15.7% 0 0 $8,785,512 38.4%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 2 5.2% 0 0 $440,969 1.9%
UNSPECIFIED NATURAL FORCE DAMAGE 1 2.6% 0 0 $5,377,678 23.5%
Sub Total 3 7.8% 0 0 $5,818,647 25.4%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 10 26.3% 1 6 $1,903,361 8.3%
Sub Total 10 26.3% 1 6 $1,903,361 8.3%
Totals 34 89.4% 2 8 $21,767,273 95.2%
National, Gas Transmission Onshore, 1999
National Gas Transmission Offshore: Significant Incident Details: 1999
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
INTERNAL CORROSION 3 7.8% 0 0 $873,872 3.8%
Sub Total 3 7.8% 0 0 $873,872 3.8%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE 1 2.6% 0 0 $201,662 0.8%
Sub Total 1 2.6% 0 0 $201,662 0.8%
Totals 4 10.5% 0 0 $1,075,535 4.7%
National, Gas Transmission Offshore, 1999
National Gas Gathering: Significant Incident Details: 1999
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
INTERNAL CORROSION 1 50.0% 0 0 $336,104 77.0%
Sub Total 1 50.0% 0 0 $336,104 77.0%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 1 50.0% 0 0 $99,872 22.9%
Sub Total 1 50.0% 0 0 $99,872 22.9%
Totals 2 100.0% 0 0 $435,977 100.0%
National, Gas Gathering, 1999
National Gas Distribution: Significant Incident Details: 1999
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 4 4.5% 1 3 $220,484 0.6%
UNSPECIFIED CORROSION 3 3.4% 0 2 $914,205 2.7%
Sub Total 7 7.9% 1 5 $1,134,690 3.3%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 2.2% 0 2 $134,441 0.4%
THIRD PARTY EXCAVATION DAMAGE 36 40.9% 14 31 $24,527,389 73.1%
Sub Total 38 43.1% 14 33 $24,661,831 73.5%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 9 10.2% 0 11 $703,131 2.1%
Sub Total 9 10.2% 0 11 $703,131 2.1%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 3 3.4% 0 2 $571,378 1.7%
Sub Total 3 3.4% 0 2 $571,378 1.7%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 2 2.2% 0 8 $773,041 2.3%
TEMPERATURE 2 2.2% 0 2 $67,220 0.2%
Sub Total 4 4.5% 0 10 $840,262 2.5%
OTHER OUTSIDE FORCE DAMAGE
UNSPECIFIED OUTSIDE FORCE DAMAGE 8 9.0% 1 0 $1,121,245 3.3%
Sub Total 8 9.0% 1 0 $1,121,245 3.3%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 19 21.5% 0 19 $4,510,527 13.4%
Sub Total 19 21.5% 0 19 $4,510,527 13.4%
Totals 88 100.0% 16 80 $33,543,066 100.0%
National, Gas Distribution, 1999

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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