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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 and Mileage Reports are available.

National All Pipeline Systems: Significant Incident Details: 2010
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 26 9.8% 0 2 $71,250,556 4.2%
INTERNAL CORROSION 34 12.9% 0 0 $16,012,037 0.9%
Sub Total 60 22.8% 0 2 $87,262,594 5.2%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 4 1.5% 0 0 $519,018 0.0%
THIRD PARTY EXCAVATION DAMAGE 29 11.0% 5 11 $21,504,404 1.2%
PREVIOUS DAMAGE DUE TO EXCAVATION 2 0.7% 0 0 $720,592 0.0%
Sub Total 35 13.3% 5 11 $22,744,015 1.3%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 2 0.7% 1 1 $33,863 0.0%
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 1 0.3% 0 0 $29,033,357 1.7%
INCORRECT VALVE POSITION 5 1.9% 0 0 $1,499,466 0.0%
PIPELINE/EQUIPMENT OVERPRESSURED 6 2.2% 0 0 $6,669,370 0.4%
INCORRECT INSTALLATION 2 0.7% 0 1 $218,892 0.0%
OTHER INCORRECT OPERATION 11 4.1% 1 13 $22,941,887 1.3%
Sub Total 27 10.2% 2 15 $60,396,837 3.6%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 21 7.9% 0 0 $6,619,038 0.3%
MANUFACTURING-RELATED 12 4.5% 8 51 $403,827,180 24.1%
ENVIRONMENTAL CRACKING-RELATED 3 1.1% 0 0 $998,043,610 59.5%
BODY OF PIPE 2 0.7% 0 5 $686,706 0.0%
MECHANICAL FITTING 1 0.3% 1 1 $0 0.0%
OTHER PIPE/WELD/JOINT FAILURE 1 0.3% 0 1 $145,314 0.0%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 7 2.6% 0 0 $1,941,957 0.1%
PUMP/COMPRESSOR-RELATED EQUIPMENT 4 1.5% 0 0 $497,939 0.0%
THREADED CONNECTION/COUPLING FAILURE 6 2.2% 0 0 $1,376,636 0.0%
NON-THREADED CONNECTION FAILURE 7 2.6% 0 0 $1,664,487 0.1%
DEFECTIVE OR LOOSE TUBING/FITTING 3 1.1% 0 0 $452,986 0.0%
FAILURE OF EQUIPMENT BODY 5 1.9% 0 0 $3,767,247 0.2%
OTHER EQUIPMENT FAILURE 10 3.8% 0 1 $2,216,152 0.1%
Sub Total 82 31.1% 9 59 $1,421,239,258 84.8%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 2 0.7% 0 0 $633,923 0.0%
HEAVY RAINS/FLOODS 2 0.7% 0 0 $2,038,566 0.1%
LIGHTNING 2 0.7% 0 0 $548,176 0.0%
TEMPERATURE 7 2.6% 0 1 $1,033,042 0.0%
OTHER NATURAL FORCE DAMAGE 2 0.7% 0 0 $816,479 0.0%
Sub Total 15 5.7% 0 1 $5,070,188 0.3%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 10 3.8% 0 2 $8,744,085 0.5%
FISHING OR MARITIME ACTIVITY 1 0.3% 0 0 $2,154,249 0.1%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 4 1.5% 0 3 $51,185,075 3.0%
OTHER OUTSIDE FORCE DAMAGE 7 2.6% 0 0 $3,579,511 0.2%
Sub Total 22 8.3% 0 5 $65,662,922 3.9%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 13 4.9% 0 6 $9,472,019 0.5%
UNKNOWN CAUSE 9 3.4% 3 5 $4,097,870 0.2%
Sub Total 22 8.3% 3 11 $13,569,889 0.8%
Totals 263 100.0% 19 104 $1,675,945,706 100.0%
National, All Pipeline Systems, 2010
National Hazardous Liquid: Significant Incident Details: 2010
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 14 11.4% 0 0 $67,586,789 5.5%
INTERNAL CORROSION 13 10.6% 0 0 $3,457,401 0.2%
Sub Total 27 22.1% 0 0 $71,044,191 5.7%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 1.6% 0 0 $92,634 0.0%
THIRD PARTY EXCAVATION DAMAGE 10 8.2% 1 1 $16,975,391 1.3%
PREVIOUS DAMAGE DUE TO EXCAVATION 1 0.8% 0 0 $595,355 0.0%
Sub Total 13 10.6% 1 1 $17,663,380 1.4%
INCORRECT OPERATION
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 1 0.8% 0 0 $29,033,357 2.3%
INCORRECT VALVE POSITION 3 2.4% 0 0 $135,354 0.0%
PIPELINE/EQUIPMENT OVERPRESSURED 6 4.9% 0 0 $6,669,370 0.5%
OTHER INCORRECT OPERATION 5 4.1% 0 3 $21,900,509 1.7%
Sub Total 15 12.3% 0 3 $57,738,592 4.7%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 14 11.4% 0 0 $4,291,317 0.3%
MANUFACTURING-RELATED 6 4.9% 0 0 $7,977,242 0.6%
ENVIRONMENTAL CRACKING-RELATED 3 2.4% 0 0 $998,043,610 81.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 4 3.2% 0 0 $1,543,238 0.1%
PUMP/COMPRESSOR-RELATED EQUIPMENT 3 2.4% 0 0 $177,346 0.0%
THREADED CONNECTION/COUPLING FAILURE 2 1.6% 0 0 $325,630 0.0%
NON-THREADED CONNECTION FAILURE 5 4.1% 0 0 $1,249,670 0.1%
DEFECTIVE OR LOOSE TUBING/FITTING 3 2.4% 0 0 $452,986 0.0%
FAILURE OF EQUIPMENT BODY 3 2.4% 0 0 $904,202 0.0%
OTHER EQUIPMENT FAILURE 7 5.7% 0 0 $1,773,065 0.1%
Sub Total 50 40.9% 0 0 $1,016,738,309 82.8%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 1 0.8% 0 0 $112,026 0.0%
HEAVY RAINS/FLOODS 1 0.8% 0 0 $1,938,381 0.1%
TEMPERATURE 5 4.1% 0 0 $637,317 0.0%
OTHER NATURAL FORCE DAMAGE 1 0.8% 0 0 $536,717 0.0%
Sub Total 8 6.5% 0 0 $3,224,444 0.2%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 2 1.6% 0 0 $7,833,613 0.6%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 2 1.6% 0 0 $50,472,936 4.1%
OTHER OUTSIDE FORCE DAMAGE 1 0.8% 0 0 $2,201,322 0.1%
Sub Total 5 4.1% 0 0 $60,507,871 4.9%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 4 3.2% 0 0 $388,590 0.0%
Sub Total 4 3.2% 0 0 $388,590 0.0%
Totals 122 100.0% 1 4 $1,227,305,379 100.0%
National, Hazardous Liquid, 2010
National Hazardous Liquid Onshore: Significant Incident Details: 2010
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 14 11.4% 0 0 $67,586,789 5.5%
INTERNAL CORROSION 13 10.6% 0 0 $3,457,401 0.2%
Sub Total 27 22.1% 0 0 $71,044,191 5.7%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 1.6% 0 0 $92,634 0.0%
THIRD PARTY EXCAVATION DAMAGE 10 8.2% 1 1 $16,975,391 1.3%
PREVIOUS DAMAGE DUE TO EXCAVATION 1 0.8% 0 0 $595,355 0.0%
Sub Total 13 10.6% 1 1 $17,663,380 1.4%
INCORRECT OPERATION
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 1 0.8% 0 0 $29,033,357 2.3%
INCORRECT VALVE POSITION 1 0.8% 0 0 $135,354 0.0%
PIPELINE/EQUIPMENT OVERPRESSURED 6 4.9% 0 0 $6,669,370 0.5%
OTHER INCORRECT OPERATION 5 4.1% 0 3 $21,900,509 1.7%
Sub Total 13 10.6% 0 3 $57,738,592 4.7%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 14 11.4% 0 0 $4,291,317 0.3%
MANUFACTURING-RELATED 6 4.9% 0 0 $7,977,242 0.6%
ENVIRONMENTAL CRACKING-RELATED 3 2.4% 0 0 $998,043,610 81.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 3 2.4% 0 0 $459,373 0.0%
PUMP/COMPRESSOR-RELATED EQUIPMENT 3 2.4% 0 0 $177,346 0.0%
THREADED CONNECTION/COUPLING FAILURE 2 1.6% 0 0 $325,630 0.0%
NON-THREADED CONNECTION FAILURE 5 4.1% 0 0 $1,249,670 0.1%
DEFECTIVE OR LOOSE TUBING/FITTING 3 2.4% 0 0 $452,986 0.0%
FAILURE OF EQUIPMENT BODY 3 2.4% 0 0 $904,202 0.0%
OTHER EQUIPMENT FAILURE 7 5.7% 0 0 $1,773,065 0.1%
Sub Total 49 40.1% 0 0 $1,015,654,444 82.7%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 1 0.8% 0 0 $112,026 0.0%
HEAVY RAINS/FLOODS 1 0.8% 0 0 $1,938,381 0.1%
TEMPERATURE 5 4.1% 0 0 $637,317 0.0%
OTHER NATURAL FORCE DAMAGE 1 0.8% 0 0 $536,717 0.0%
Sub Total 8 6.5% 0 0 $3,224,444 0.2%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 2 1.6% 0 0 $7,833,613 0.6%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 2 1.6% 0 0 $50,472,936 4.1%
Sub Total 4 3.2% 0 0 $58,306,549 4.7%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 4 3.2% 0 0 $388,590 0.0%
Sub Total 4 3.2% 0 0 $388,590 0.0%
Totals 118 96.7% 1 4 $1,224,020,193 99.7%
National, Hazardous Liquid Onshore, 2010
National Hazardous Liquid Offshore: Significant Incident Details: 2010
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
INCORRECT OPERATION
INCORRECT VALVE POSITION 2 1.6% 0 0 $0 0.0%
Sub Total 2 1.6% 0 0 $0 0.0%
MAT'L/WELD/EQUIP FAILURE
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 1 0.8% 0 0 $1,083,864 0.0%
Sub Total 1 0.8% 0 0 $1,083,864 0.0%
OTHER OUTSIDE FORCE DAMAGE
OTHER OUTSIDE FORCE DAMAGE 1 0.8% 0 0 $2,201,322 0.1%
Sub Total 1 0.8% 0 0 $2,201,322 0.1%
Totals 4 3.2% 0 0 $3,285,186 0.2%
National, Hazardous Liquid Offshore, 2010
National Gas Transmission: Significant Incident Details: 2010
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 9 11.3% 0 0 $3,473,289 0.8%
INTERNAL CORROSION 17 21.5% 0 0 $11,173,416 2.6%
Sub Total 26 32.9% 0 0 $14,646,705 3.4%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 1.2% 0 0 $215,193 0.0%
THIRD PARTY EXCAVATION DAMAGE 8 10.1% 2 7 $2,415,873 0.5%
PREVIOUS DAMAGE DUE TO EXCAVATION 1 1.2% 0 0 $125,237 0.0%
Sub Total 10 12.6% 2 7 $2,756,304 0.6%
INCORRECT OPERATION
INCORRECT VALVE POSITION 1 1.2% 0 0 $229,716 0.0%
INCORRECT INSTALLATION 1 1.2% 0 0 $135,203 0.0%
OTHER INCORRECT OPERATION 1 1.2% 0 0 $514,171 0.1%
Sub Total 3 3.8% 0 0 $879,090 0.2%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 7 8.8% 0 0 $2,327,721 0.5%
MANUFACTURING-RELATED 6 7.5% 8 51 $395,849,937 92.5%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 2 2.5% 0 0 $285,706 0.0%
PUMP/COMPRESSOR-RELATED EQUIPMENT 1 1.2% 0 0 $320,593 0.0%
THREADED CONNECTION/COUPLING FAILURE 3 3.8% 0 0 $887,791 0.2%
FAILURE OF EQUIPMENT BODY 2 2.5% 0 0 $2,863,045 0.6%
OTHER EQUIPMENT FAILURE 3 3.8% 0 1 $443,086 0.1%
Sub Total 24 30.3% 8 52 $402,977,882 94.2%
NATURAL FORCE DAMAGE
LIGHTNING 1 1.2% 0 0 $366,612 0.0%
TEMPERATURE 1 1.2% 0 0 $133,423 0.0%
OTHER NATURAL FORCE DAMAGE 1 1.2% 0 0 $279,761 0.0%
Sub Total 3 3.8% 0 0 $779,797 0.1%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 3 3.8% 0 0 $336,725 0.0%
FISHING OR MARITIME ACTIVITY 1 1.2% 0 0 $2,154,249 0.5%
OTHER OUTSIDE FORCE DAMAGE 1 1.2% 0 0 $165,320 0.0%
Sub Total 5 6.3% 0 0 $2,656,295 0.6%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 6 7.5% 0 1 $2,658,207 0.6%
UNKNOWN CAUSE 2 2.5% 0 1 $378,406 0.0%
Sub Total 8 10.1% 0 2 $3,036,613 0.7%
Totals 79 100.0% 10 61 $427,732,690 100.0%
National, Gas Transmission, 2010
National Gas Transmission Onshore: Significant Incident Details: 2010
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 7 8.8% 0 0 $3,138,836 0.7%
INTERNAL CORROSION 4 5.0% 0 0 $4,429,438 1.0%
Sub Total 11 13.9% 0 0 $7,568,275 1.7%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 1.2% 0 0 $215,193 0.0%
THIRD PARTY EXCAVATION DAMAGE 8 10.1% 2 7 $2,415,873 0.5%
PREVIOUS DAMAGE DUE TO EXCAVATION 1 1.2% 0 0 $125,237 0.0%
Sub Total 10 12.6% 2 7 $2,756,304 0.6%
INCORRECT OPERATION
INCORRECT VALVE POSITION 1 1.2% 0 0 $229,716 0.0%
INCORRECT INSTALLATION 1 1.2% 0 0 $135,203 0.0%
OTHER INCORRECT OPERATION 1 1.2% 0 0 $514,171 0.1%
Sub Total 3 3.8% 0 0 $879,090 0.2%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 7 8.8% 0 0 $2,327,721 0.5%
MANUFACTURING-RELATED 4 5.0% 8 51 $394,691,065 92.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 2 2.5% 0 0 $285,706 0.0%
PUMP/COMPRESSOR-RELATED EQUIPMENT 1 1.2% 0 0 $320,593 0.0%
THREADED CONNECTION/COUPLING FAILURE 3 3.8% 0 0 $887,791 0.2%
FAILURE OF EQUIPMENT BODY 2 2.5% 0 0 $2,863,045 0.6%
OTHER EQUIPMENT FAILURE 2 2.5% 0 1 $232,160 0.0%
Sub Total 21 26.5% 8 52 $401,608,084 93.8%
NATURAL FORCE DAMAGE
LIGHTNING 1 1.2% 0 0 $366,612 0.0%
TEMPERATURE 1 1.2% 0 0 $133,423 0.0%
Sub Total 2 2.5% 0 0 $500,035 0.1%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 3 3.8% 0 0 $336,725 0.0%
OTHER OUTSIDE FORCE DAMAGE 1 1.2% 0 0 $165,320 0.0%
Sub Total 4 5.0% 0 0 $502,045 0.1%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 5 6.3% 0 1 $2,192,774 0.5%
UNKNOWN CAUSE 2 2.5% 0 1 $378,406 0.0%
Sub Total 7 8.8% 0 2 $2,571,180 0.6%
Totals 58 73.4% 10 61 $416,385,016 97.3%
National, Gas Transmission Onshore, 2010
National Gas Transmission Offshore: Significant Incident Details: 2010
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 2 2.5% 0 0 $334,453 0.0%
INTERNAL CORROSION 13 16.4% 0 0 $6,743,977 1.5%
Sub Total 15 18.9% 0 0 $7,078,430 1.6%
MAT'L/WELD/EQUIP FAILURE
MANUFACTURING-RELATED 2 2.5% 0 0 $1,158,872 0.2%
OTHER EQUIPMENT FAILURE 1 1.2% 0 0 $210,926 0.0%
Sub Total 3 3.8% 0 0 $1,369,798 0.3%
NATURAL FORCE DAMAGE
OTHER NATURAL FORCE DAMAGE 1 1.2% 0 0 $279,761 0.0%
Sub Total 1 1.2% 0 0 $279,761 0.0%
OTHER OUTSIDE FORCE DAMAGE
FISHING OR MARITIME ACTIVITY 1 1.2% 0 0 $2,154,249 0.5%
Sub Total 1 1.2% 0 0 $2,154,249 0.5%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 1 1.2% 0 0 $465,433 0.1%
Sub Total 1 1.2% 0 0 $465,433 0.1%
Totals 21 26.5% 0 0 $11,347,673 2.6%
National, Gas Transmission Offshore, 2010
National Gas Gathering: Significant Incident Details: 2010
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
INTERNAL CORROSION 4 57.1% 0 0 $1,381,219 66.0%
Sub Total 4 57.1% 0 0 $1,381,219 66.0%
MAT'L/WELD/EQUIP FAILURE
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 1 14.2% 0 0 $113,013 5.4%
THREADED CONNECTION/COUPLING FAILURE 1 14.2% 0 0 $163,214 7.8%
Sub Total 2 28.5% 0 0 $276,227 13.2%
OTHER OUTSIDE FORCE DAMAGE
OTHER OUTSIDE FORCE DAMAGE 1 14.2% 0 0 $432,593 20.7%
Sub Total 1 14.2% 0 0 $432,593 20.7%
Totals 7 100.0% 0 0 $2,090,040 100.0%
National, Gas Gathering, 2010
National Gas Distribution: Significant Incident Details: 2010
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 3 5.4% 0 2 $190,477 1.0%
Sub Total 3 5.4% 0 2 $190,477 1.0%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 1.8% 0 0 $211,190 1.1%
THIRD PARTY EXCAVATION DAMAGE 11 20.0% 2 3 $2,113,139 11.2%
Sub Total 12 21.8% 2 3 $2,324,330 12.3%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 2 3.6% 1 1 $33,863 0.1%
INCORRECT VALVE POSITION 1 1.8% 0 0 $1,134,394 6.0%
INCORRECT INSTALLATION 1 1.8% 0 1 $83,689 0.4%
OTHER INCORRECT OPERATION 5 9.0% 1 10 $527,206 2.8%
Sub Total 9 16.3% 2 12 $1,779,154 9.4%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE 2 3.6% 0 5 $686,706 3.6%
MECHANICAL FITTING 1 1.8% 1 1 $0 0.0%
OTHER PIPE/WELD/JOINT FAILURE 1 1.8% 0 1 $145,314 0.7%
NON-THREADED CONNECTION FAILURE 2 3.6% 0 0 $414,817 2.2%
Sub Total 6 10.9% 1 7 $1,246,838 6.6%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 1 1.8% 0 0 $521,896 2.7%
HEAVY RAINS/FLOODS 1 1.8% 0 0 $100,184 0.5%
LIGHTNING 1 1.8% 0 0 $181,564 0.9%
TEMPERATURE 1 1.8% 0 1 $262,300 1.3%
Sub Total 4 7.2% 0 1 $1,065,946 5.6%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 5 9.0% 0 2 $573,746 3.0%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 2 3.6% 0 3 $712,139 3.7%
OTHER OUTSIDE FORCE DAMAGE 4 7.2% 0 0 $780,276 4.1%
Sub Total 11 20.0% 0 5 $2,066,162 10.9%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 3 5.4% 0 5 $6,425,221 34.1%
UNKNOWN CAUSE 7 12.7% 3 4 $3,719,464 19.7%
Sub Total 10 18.1% 3 9 $10,144,685 53.9%
Totals 55 100.0% 8 39 $18,817,596 100.0%
National, Gas Distribution, 2010

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 - Apr 01, 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 and Mileage Reports for more pipeline safety reports.

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