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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: 1994-2013
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 533 9.4% 9 60 $491,731,017 7.3%
INTERNAL CORROSION 541 9.6% 13 6 $334,141,993 4.9%
UNSPECIFIED CORROSION 17 0.3% 1 11 $6,009,015 0.0%
Sub Total 1,091 19.4% 23 77 $831,882,026 12.4%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 148 2.6% 2 41 $52,068,183 0.7%
THIRD PARTY EXCAVATION DAMAGE 1,043 18.5% 136 441 $462,932,528 6.9%
PREVIOUS DAMAGE DUE TO EXCAVATION 14 0.2% 0 4 $30,120,399 0.4%
UNSPECIFIED EXCAVATION DAMAGE 19 0.3% 4 5 $18,708,502 0.2%
Sub Total 1,224 21.7% 142 491 $563,829,614 8.4%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 7 0.1% 1 18 $1,848,750 0.0%
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 8 0.1% 0 0 $29,769,475 0.4%
INCORRECT VALVE POSITION 14 0.2% 0 0 $6,846,476 0.1%
PIPELINE/EQUIPMENT OVERPRESSURED 13 0.2% 0 0 $15,889,205 0.2%
INCORRECT INSTALLATION 12 0.2% 0 1 $3,337,236 0.0%
OTHER INCORRECT OPERATION 40 0.7% 1 18 $38,401,478 0.5%
UNSPECIFIED INCORRECT OPERATION 281 5.0% 16 122 $73,083,685 1.0%
Sub Total 375 6.6% 18 159 $169,176,307 2.5%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 68 1.2% 0 0 $30,210,148 0.4%
MANUFACTURING-RELATED 48 0.8% 8 51 $538,457,284 8.0%
ENVIRONMENTAL CRACKING-RELATED 31 0.5% 0 3 $958,425,861 14.3%
BODY OF PIPE 58 1.0% 3 18 $44,779,756 0.6%
PIPE SEAM 59 1.0% 2 7 $89,894,917 1.3%
UNSPECIFIED PIPE BODY OR SEAM 66 1.1% 0 2 $104,814,324 1.5%
BUTT WELD 52 0.9% 0 0 $47,339,111 0.7%
FILLET WELD 23 0.4% 0 0 $24,835,458 0.3%
UNSPECIFIED WELD 55 0.9% 0 0 $20,861,110 0.3%
FUSION JOINT 2 0.0% 0 1 $171,593 0.0%
COMPRESSION FITTING 1 0.0% 0 0 $489,675 0.0%
MECHANICAL FITTING 3 0.0% 1 1 $1,363,703 0.0%
JOINT/FITTING/COMPONENT 130 2.3% 2 7 $72,309,330 1.0%
OTHER PIPE/WELD/JOINT FAILURE 3 0.0% 0 2 $350,480 0.0%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 178 3.1% 1 5 $56,877,672 0.8%
VALVE 4 0.0% 0 0 $1,514,112 0.0%
PUMP/COMPRESSOR-RELATED EQUIPMENT 41 0.7% 0 1 $13,369,297 0.2%
THREADED CONNECTION/COUPLING FAILURE 85 1.5% 0 4 $25,999,290 0.3%
NON-THREADED CONNECTION FAILURE 107 1.9% 0 4 $80,852,208 1.2%
DEFECTIVE OR LOOSE TUBING/FITTING 8 0.1% 0 0 $1,496,298 0.0%
FAILURE OF EQUIPMENT BODY 13 0.2% 0 0 $5,616,618 0.0%
OTHER EQUIPMENT FAILURE 36 0.6% 1 2 $12,335,147 0.1%
UNSPECIFIED EQUIPMENT FAILURE 1 0.0% 0 0 $174 0.0%
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 82 1.4% 1 44 $25,761,039 0.3%
Sub Total 1,154 20.5% 19 152 $2,158,124,619 32.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 135 2.4% 3 (F) 44 $354,201,880 5.2%
HEAVY RAINS/FLOODS 127 2.2% 0 (F) 1 $1,149,755,114 17.1%
LIGHTNING 38 0.6% 4 (F) 2 $50,572,815 0.7%
TEMPERATURE 78 1.3% 5 (F) 29 $21,537,351 0.3%
HIGH WINDS 33 0.5% 1 (F) 0 $453,275,641 6.7%
OTHER NATURAL FORCE DAMAGE 9 0.1% 1 (F) 2 $7,030,370 0.1%
UNSPECIFIED NATURAL FORCE DAMAGE 31 0.5% 0 (F) 1 $22,477,399 0.3%
Sub Total 451 8.0% 14 79 $2,058,850,573 30.7%
OTHER OUTSIDE FORCE DAMAGE
FIRE/EXPLOSION AS PRIMARY CAUSE 15 0.2% 0 2 $14,586,782 0.2%
VEHICLE NOT ENGAGED IN EXCAVATION 172 3.0% 20 63 $115,126,637 1.7%
MARITIME EQUIPMENT OR VESSEL ADRIFT 2 0.0% 0 0 $228,295 0.0%
FISHING OR MARITIME ACTIVITY 10 0.1% 1 0 $43,707,795 0.6%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 13 0.2% 0 5 $62,276,429 0.9%
PREVIOUS MECHANICAL DAMAGE 20 0.3% 0 1 $27,134,219 0.4%
INTENTIONAL DAMAGE 18 0.3% 4 10 $4,218,815 0.0%
OTHER OUTSIDE FORCE DAMAGE 27 0.4% 0 4 $35,773,304 0.5%
UNSPECIFIED OUTSIDE FORCE DAMAGE 65 1.1% 7 9 $29,299,011 0.4%
Sub Total 342 6.0% 32 94 $332,351,291 4.9%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 862 15.3% 81 269 $527,730,908 7.8%
UNKNOWN CAUSE 122 2.1% 30 76 $48,415,985 0.7%
UNSPECIFIED 1 0.0% 0 0 $138 0.0%
Sub Total 985 17.5% 111 345 $576,147,033 8.6%
Totals 5,622 100.0% 359 1,397 $6,690,361,466 100.0%
National, All Pipeline Systems, 1994-2013
National Hazardous Liquid: Significant Incident Details: 1994-2013
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 364 13.4% 0 17 $395,309,556 11.2%
INTERNAL CORROSION 288 10.6% 1 1 $191,774,930 5.4%
UNSPECIFIED CORROSION 10 0.3% 0 0 $3,926,829 0.1%
Sub Total 662 24.3% 1 18 $591,011,315 16.7%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 92 3.3% 0 7 $38,966,832 1.1%
THIRD PARTY EXCAVATION DAMAGE 329 12.1% 9 26 $167,362,641 4.7%
PREVIOUS DAMAGE DUE TO EXCAVATION 7 0.2% 0 0 $28,103,170 0.8%
UNSPECIFIED EXCAVATION DAMAGE 15 0.5% 3 4 $16,755,110 0.4%
Sub Total 443 16.3% 12 37 $251,187,754 7.1%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 4 0.1% 0 0 $481,007 0.0%
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 8 0.2% 0 0 $29,769,475 0.8%
INCORRECT VALVE POSITION 8 0.2% 0 0 $836,609 0.0%
PIPELINE/EQUIPMENT OVERPRESSURED 12 0.4% 0 0 $15,809,391 0.4%
INCORRECT INSTALLATION 9 0.3% 0 0 $2,991,843 0.0%
OTHER INCORRECT OPERATION 19 0.7% 0 3 $27,414,264 0.7%
UNSPECIFIED INCORRECT OPERATION 169 6.2% 9 13 $56,431,220 1.6%
Sub Total 229 8.4% 9 16 $133,733,813 3.8%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 41 1.5% 0 0 $11,336,814 0.3%
MANUFACTURING-RELATED 33 1.2% 0 0 $131,631,227 3.7%
ENVIRONMENTAL CRACKING-RELATED 14 0.5% 0 0 $845,805,290 24.0%
BODY OF PIPE 25 0.9% 0 0 $30,308,565 0.8%
PIPE SEAM 42 1.5% 2 7 $84,142,131 2.3%
UNSPECIFIED PIPE BODY OR SEAM 66 2.4% 0 2 $104,814,324 2.9%
BUTT WELD 23 0.8% 0 0 $25,861,603 0.7%
FILLET WELD 17 0.6% 0 0 $22,950,882 0.6%
UNSPECIFIED WELD 55 2.0% 0 0 $20,861,110 0.5%
JOINT/FITTING/COMPONENT 74 2.7% 0 1 $36,138,694 1.0%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 116 4.2% 1 1 $12,614,358 0.3%
PUMP/COMPRESSOR-RELATED EQUIPMENT 35 1.2% 0 0 $4,976,944 0.1%
THREADED CONNECTION/COUPLING FAILURE 54 1.9% 0 0 $15,490,620 0.4%
NON-THREADED CONNECTION FAILURE 92 3.3% 0 0 $64,171,031 1.8%
DEFECTIVE OR LOOSE TUBING/FITTING 8 0.2% 0 0 $1,496,298 0.0%
FAILURE OF EQUIPMENT BODY 10 0.3% 0 0 $2,298,573 0.0%
OTHER EQUIPMENT FAILURE 25 0.9% 1 1 $8,069,651 0.2%
UNSPECIFIED EQUIPMENT FAILURE 1 0.0% 0 0 $174 0.0%
Sub Total 731 26.9% 4 12 $1,422,968,298 40.4%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 26 0.9% 0 (F) 1 $97,046,050 2.7%
HEAVY RAINS/FLOODS 28 1.0% 0 (F) 0 $268,250,494 7.6%
LIGHTNING 24 0.8% 0 (F) 0 $47,052,473 1.3%
TEMPERATURE 29 1.0% 0 (F) 0 $10,306,390 0.2%
HIGH WINDS 15 0.5% 0 (F) 0 $287,164,881 8.1%
OTHER NATURAL FORCE DAMAGE 1 0.0% 0 (F) 0 $536,717 0.0%
UNSPECIFIED NATURAL FORCE DAMAGE 21 0.7% 0 (F) 0 $7,300,922 0.2%
Sub Total 144 5.3% 0 1 $717,657,930 20.3%
OTHER OUTSIDE FORCE DAMAGE
FIRE/EXPLOSION AS PRIMARY CAUSE 7 0.2% 0 0 $3,600,769 0.1%
VEHICLE NOT ENGAGED IN EXCAVATION 20 0.7% 3 3 $39,245,732 1.1%
MARITIME EQUIPMENT OR VESSEL ADRIFT 1 0.0% 0 0 $130,300 0.0%
FISHING OR MARITIME ACTIVITY 4 0.1% 1 0 $39,159,574 1.1%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 7 0.2% 0 0 $60,539,969 1.7%
PREVIOUS MECHANICAL DAMAGE 8 0.2% 0 0 $19,059,410 0.5%
INTENTIONAL DAMAGE 7 0.2% 0 2 $2,445,791 0.0%
OTHER OUTSIDE FORCE DAMAGE 6 0.2% 0 0 $4,206,049 0.1%
UNSPECIFIED OUTSIDE FORCE DAMAGE 1 0.0% 0 0 $1,139,364 0.0%
Sub Total 61 2.2% 4 5 $169,526,962 4.8%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 429 15.8% 9 37 $227,706,793 6.4%
UNKNOWN CAUSE 15 0.5% 1 6 $8,197,876 0.2%
UNSPECIFIED 1 0.0% 0 0 $138 0.0%
Sub Total 445 16.3% 10 43 $235,904,808 6.7%
Totals 2,715 100.0% 40 132 $3,521,990,883 100.0%
National, Hazardous Liquid, 1994-2013
National Hazardous Liquid Onshore: Significant Incident Details: 1994-2013
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 352 12.9% 0 17 $391,948,067 11.1%
INTERNAL CORROSION 282 10.3% 1 1 $190,581,346 5.4%
UNSPECIFIED CORROSION 10 0.3% 0 0 $3,926,829 0.1%
Sub Total 644 23.7% 1 18 $586,456,243 16.6%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 90 3.3% 0 7 $36,711,777 1.0%
THIRD PARTY EXCAVATION DAMAGE 326 12.0% 9 26 $165,982,049 4.7%
PREVIOUS DAMAGE DUE TO EXCAVATION 7 0.2% 0 0 $28,103,170 0.8%
UNSPECIFIED EXCAVATION DAMAGE 12 0.4% 3 4 $15,090,595 0.4%
Sub Total 435 16.0% 12 37 $245,887,592 6.9%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 4 0.1% 0 0 $481,007 0.0%
OVERFILL/OVERFLOW OF TANK/VESSEL/SUMP 8 0.2% 0 0 $29,769,475 0.8%
INCORRECT VALVE POSITION 7 0.2% 0 0 $836,609 0.0%
PIPELINE/EQUIPMENT OVERPRESSURED 12 0.4% 0 0 $15,809,391 0.4%
INCORRECT INSTALLATION 9 0.3% 0 0 $2,991,843 0.0%
OTHER INCORRECT OPERATION 19 0.7% 0 3 $27,414,264 0.7%
UNSPECIFIED INCORRECT OPERATION 169 6.2% 9 13 $56,431,220 1.6%
Sub Total 228 8.4% 9 16 $133,733,813 3.8%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 41 1.5% 0 0 $11,336,814 0.3%
MANUFACTURING-RELATED 33 1.2% 0 0 $131,631,227 3.7%
ENVIRONMENTAL CRACKING-RELATED 14 0.5% 0 0 $845,805,290 24.0%
BODY OF PIPE 25 0.9% 0 0 $30,308,565 0.8%
PIPE SEAM 42 1.5% 2 7 $84,142,131 2.3%
UNSPECIFIED PIPE BODY OR SEAM 65 2.3% 0 2 $104,125,026 2.9%
BUTT WELD 23 0.8% 0 0 $25,861,603 0.7%
FILLET WELD 17 0.6% 0 0 $22,950,882 0.6%
UNSPECIFIED WELD 55 2.0% 0 0 $20,861,110 0.5%
JOINT/FITTING/COMPONENT 71 2.6% 0 1 $21,478,495 0.6%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 115 4.2% 1 1 $11,530,494 0.3%
PUMP/COMPRESSOR-RELATED EQUIPMENT 35 1.2% 0 0 $4,976,944 0.1%
THREADED CONNECTION/COUPLING FAILURE 54 1.9% 0 0 $15,490,620 0.4%
NON-THREADED CONNECTION FAILURE 89 3.2% 0 0 $60,650,875 1.7%
DEFECTIVE OR LOOSE TUBING/FITTING 8 0.2% 0 0 $1,496,298 0.0%
FAILURE OF EQUIPMENT BODY 10 0.3% 0 0 $2,298,573 0.0%
OTHER EQUIPMENT FAILURE 25 0.9% 1 1 $8,069,651 0.2%
UNSPECIFIED EQUIPMENT FAILURE 1 0.0% 0 0 $174 0.0%
Sub Total 723 26.6% 4 12 $1,403,014,781 39.8%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 23 0.8% 0 (F) 1 $56,042,418 1.5%
HEAVY RAINS/FLOODS 24 0.8% 0 (F) 0 $243,743,437 6.9%
LIGHTNING 24 0.8% 0 (F) 0 $47,052,473 1.3%
TEMPERATURE 29 1.0% 0 (F) 0 $10,306,390 0.2%
HIGH WINDS 4 0.1% 0 (F) 0 $194,037,004 5.5%
OTHER NATURAL FORCE DAMAGE 1 0.0% 0 (F) 0 $536,717 0.0%
UNSPECIFIED NATURAL FORCE DAMAGE 20 0.7% 0 (F) 0 $6,919,543 0.2%
Sub Total 125 4.6% 0 1 $558,637,985 15.8%
OTHER OUTSIDE FORCE DAMAGE
FIRE/EXPLOSION AS PRIMARY CAUSE 7 0.2% 0 0 $3,600,769 0.1%
VEHICLE NOT ENGAGED IN EXCAVATION 16 0.5% 3 3 $28,450,175 0.8%
MARITIME EQUIPMENT OR VESSEL ADRIFT 1 0.0% 0 0 $130,300 0.0%
FISHING OR MARITIME ACTIVITY 1 0.0% 1 0 $10,262,149 0.2%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 7 0.2% 0 0 $60,539,969 1.7%
PREVIOUS MECHANICAL DAMAGE 8 0.2% 0 0 $19,059,410 0.5%
INTENTIONAL DAMAGE 7 0.2% 0 2 $2,445,791 0.0%
OTHER OUTSIDE FORCE DAMAGE 4 0.1% 0 0 $1,833,828 0.0%
UNSPECIFIED OUTSIDE FORCE DAMAGE 1 0.0% 0 0 $1,139,364 0.0%
Sub Total 52 1.9% 4 5 $127,461,757 3.6%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 414 15.2% 9 37 $212,654,450 6.0%
UNKNOWN CAUSE 14 0.5% 1 6 $7,515,904 0.2%
UNSPECIFIED 1 0.0% 0 0 $138 0.0%
Sub Total 429 15.8% 10 43 $220,170,493 6.2%
Totals 2,636 97.0% 40 132 $3,275,362,666 93.0%
National, Hazardous Liquid Onshore, 1994-2013
National Hazardous Liquid Offshore: Significant Incident Details: 1994-2013
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 12 0.4% 0 0 $3,361,488 0.1%
INTERNAL CORROSION 6 0.2% 0 0 $1,193,583 0.0%
Sub Total 18 0.6% 0 0 $4,555,072 0.1%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 2 0.0% 0 0 $2,255,055 0.0%
THIRD PARTY EXCAVATION DAMAGE 3 0.1% 0 0 $1,380,592 0.0%
UNSPECIFIED EXCAVATION DAMAGE 3 0.1% 0 0 $1,664,514 0.0%
Sub Total 8 0.2% 0 0 $5,300,162 0.1%
INCORRECT OPERATION
INCORRECT VALVE POSITION 1 0.0% 0 0 $0 0.0%
Sub Total 1 0.0% 0 0 $0 0.0%
MAT'L/WELD/EQUIP FAILURE
UNSPECIFIED PIPE BODY OR SEAM 1 0.0% 0 0 $689,298 0.0%
JOINT/FITTING/COMPONENT 3 0.1% 0 0 $14,660,199 0.4%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 1 0.0% 0 0 $1,083,864 0.0%
NON-THREADED CONNECTION FAILURE 3 0.1% 0 0 $3,520,155 0.1%
Sub Total 8 0.2% 0 0 $19,953,517 0.5%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 3 0.1% 0 (F) 0 $41,003,632 1.1%
HEAVY RAINS/FLOODS 4 0.1% 0 (F) 0 $24,507,056 0.7%
HIGH WINDS 11 0.4% 0 (F) 0 $93,127,877 2.6%
UNSPECIFIED NATURAL FORCE DAMAGE 1 0.0% 0 (F) 0 $381,378 0.0%
Sub Total 19 0.7% 0 0 $159,019,944 4.5%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 4 0.1% 0 0 $10,795,556 0.3%
FISHING OR MARITIME ACTIVITY 3 0.1% 0 0 $28,897,425 0.8%
OTHER OUTSIDE FORCE DAMAGE 2 0.0% 0 0 $2,372,221 0.0%
Sub Total 9 0.3% 0 0 $42,065,204 1.1%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 15 0.5% 0 0 $15,052,343 0.4%
UNKNOWN CAUSE 1 0.0% 0 0 $681,971 0.0%
Sub Total 16 0.5% 0 0 $15,734,315 0.4%
Totals 79 2.9% 0 0 $246,628,217 7.0%
National, Hazardous Liquid Offshore, 1994-2013
National Gas Transmission: Significant Incident Details: 1994-2013
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 116 9.3% 1 5 $84,668,091 4.9%
INTERNAL CORROSION 177 14.3% 12 1 $98,464,502 5.7%
Sub Total 293 23.6% 13 6 $183,132,593 10.6%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 25 2.0% 0 5 $8,906,664 0.5%
THIRD PARTY EXCAVATION DAMAGE 176 14.2% 14 43 $101,631,248 5.9%
PREVIOUS DAMAGE DUE TO EXCAVATION 6 0.4% 0 0 $1,831,489 0.1%
UNSPECIFIED EXCAVATION DAMAGE 4 0.3% 1 1 $1,953,392 0.1%
Sub Total 211 17.0% 15 49 $114,322,794 6.6%
INCORRECT OPERATION
INCORRECT VALVE POSITION 3 0.2% 0 0 $575,372 0.0%
PIPELINE/EQUIPMENT OVERPRESSURED 1 0.0% 0 0 $79,813 0.0%
INCORRECT INSTALLATION 1 0.0% 0 0 $135,203 0.0%
OTHER INCORRECT OPERATION 8 0.6% 0 1 $8,885,661 0.5%
UNSPECIFIED INCORRECT OPERATION 21 1.7% 0 8 $4,360,915 0.2%
Sub Total 34 2.7% 0 9 $14,036,965 0.8%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 27 2.1% 0 0 $18,873,334 1.1%
MANUFACTURING-RELATED 15 1.2% 8 51 $406,826,056 23.6%
ENVIRONMENTAL CRACKING-RELATED 17 1.3% 0 3 $112,620,571 6.5%
BODY OF PIPE 20 1.6% 0 0 $10,837,932 0.6%
PIPE SEAM 17 1.3% 0 0 $5,752,785 0.3%
BUTT WELD 28 2.2% 0 0 $21,097,224 1.2%
FILLET WELD 6 0.4% 0 0 $1,884,576 0.1%
JOINT/FITTING/COMPONENT 32 2.5% 0 1 $10,017,070 0.5%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 46 3.7% 0 2 $39,110,678 2.2%
PUMP/COMPRESSOR-RELATED EQUIPMENT 6 0.4% 0 1 $8,392,352 0.4%
THREADED CONNECTION/COUPLING FAILURE 25 2.0% 0 3 $7,970,384 0.4%
NON-THREADED CONNECTION FAILURE 10 0.8% 0 3 $14,419,940 0.8%
FAILURE OF EQUIPMENT BODY 3 0.2% 0 0 $3,318,045 0.1%
OTHER EQUIPMENT FAILURE 9 0.7% 0 1 $3,770,436 0.2%
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 48 3.8% 0 6 $20,535,916 1.1%
Sub Total 309 24.9% 8 71 $685,427,307 39.8%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 35 2.8% 0 1 $30,831,965 1.7%
HEAVY RAINS/FLOODS 72 5.8% 0 0 $312,226,618 18.1%
LIGHTNING 7 0.5% 0 0 $1,987,261 0.1%
TEMPERATURE 4 0.3% 0 0 $922,690 0.0%
HIGH WINDS 10 0.8% 0 0 $116,482,339 6.7%
OTHER NATURAL FORCE DAMAGE 5 0.4% 0 0 $4,857,384 0.2%
UNSPECIFIED NATURAL FORCE DAMAGE 10 0.8% 0 1 $15,176,476 0.8%
Sub Total 143 11.5% 0 2 $482,484,736 28.0%
OTHER OUTSIDE FORCE DAMAGE
FIRE/EXPLOSION AS PRIMARY CAUSE 8 0.6% 0 2 $10,986,012 0.6%
VEHICLE NOT ENGAGED IN EXCAVATION 45 3.6% 0 10 $47,242,048 2.7%
MARITIME EQUIPMENT OR VESSEL ADRIFT 1 0.0% 0 0 $97,995 0.0%
FISHING OR MARITIME ACTIVITY 6 0.4% 0 0 $4,548,220 0.2%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 1 0.0% 0 0 $145,004 0.0%
PREVIOUS MECHANICAL DAMAGE 6 0.4% 0 1 $3,612,748 0.2%
INTENTIONAL DAMAGE 1 0.0% 0 0 $84,384 0.0%
OTHER OUTSIDE FORCE DAMAGE 6 0.4% 0 0 $27,512,843 1.6%
UNSPECIFIED OUTSIDE FORCE DAMAGE 1 0.0% 0 0 $667,062 0.0%
Sub Total 75 6.0% 0 13 $94,896,320 5.5%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 153 12.3% 5 44 $131,467,438 7.6%
UNKNOWN CAUSE 20 1.6% 0 1 $12,932,401 0.7%
Sub Total 173 13.9% 5 45 $144,399,839 8.4%
Totals 1,238 100.0% 41 195 $1,718,700,558 100.0%
National, Gas Transmission, 1994-2013
National Gas Transmission Onshore: Significant Incident Details: 1994-2013
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 107 8.6% 1 5 $82,787,038 4.8%
INTERNAL CORROSION 64 5.1% 12 1 $52,708,089 3.0%
Sub Total 171 13.8% 13 6 $135,495,128 7.8%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 24 1.9% 0 5 $4,820,463 0.2%
THIRD PARTY EXCAVATION DAMAGE 155 12.5% 14 36 $80,724,060 4.7%
PREVIOUS DAMAGE DUE TO EXCAVATION 6 0.4% 0 0 $1,831,489 0.1%
UNSPECIFIED EXCAVATION DAMAGE 4 0.3% 1 1 $1,953,392 0.1%
Sub Total 189 15.2% 15 42 $89,329,405 5.2%
INCORRECT OPERATION
INCORRECT VALVE POSITION 3 0.2% 0 0 $575,372 0.0%
PIPELINE/EQUIPMENT OVERPRESSURED 1 0.0% 0 0 $79,813 0.0%
INCORRECT INSTALLATION 1 0.0% 0 0 $135,203 0.0%
OTHER INCORRECT OPERATION 8 0.6% 0 1 $8,885,661 0.5%
UNSPECIFIED INCORRECT OPERATION 20 1.6% 0 8 $3,922,869 0.2%
Sub Total 33 2.6% 0 9 $13,598,919 0.7%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 25 2.0% 0 0 $16,251,541 0.9%
MANUFACTURING-RELATED 13 1.0% 8 51 $405,667,184 23.6%
ENVIRONMENTAL CRACKING-RELATED 16 1.2% 0 3 $112,289,309 6.5%
BODY OF PIPE 19 1.5% 0 0 $10,721,002 0.6%
PIPE SEAM 17 1.3% 0 0 $5,752,785 0.3%
BUTT WELD 25 2.0% 0 0 $20,074,871 1.1%
FILLET WELD 6 0.4% 0 0 $1,884,576 0.1%
JOINT/FITTING/COMPONENT 19 1.5% 0 1 $3,716,877 0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 46 3.7% 0 2 $39,110,678 2.2%
PUMP/COMPRESSOR-RELATED EQUIPMENT 6 0.4% 0 1 $8,392,352 0.4%
THREADED CONNECTION/COUPLING FAILURE 23 1.8% 0 3 $7,557,736 0.4%
NON-THREADED CONNECTION FAILURE 10 0.8% 0 3 $14,419,940 0.8%
FAILURE OF EQUIPMENT BODY 3 0.2% 0 0 $3,318,045 0.1%
OTHER EQUIPMENT FAILURE 7 0.5% 0 1 $3,276,340 0.1%
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 40 3.2% 0 6 $18,538,919 1.0%
Sub Total 275 22.2% 8 71 $670,972,162 39.0%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 30 2.4% 0 1 $25,808,756 1.5%
HEAVY RAINS/FLOODS 19 1.5% 0 0 $83,656,799 4.8%
LIGHTNING 7 0.5% 0 0 $1,987,261 0.1%
TEMPERATURE 4 0.3% 0 0 $922,690 0.0%
HIGH WINDS 6 0.4% 0 0 $86,126,397 5.0%
OTHER NATURAL FORCE DAMAGE 4 0.3% 0 0 $4,577,622 0.2%
UNSPECIFIED NATURAL FORCE DAMAGE 7 0.5% 0 1 $14,267,858 0.8%
Sub Total 77 6.2% 0 2 $217,347,385 12.6%
OTHER OUTSIDE FORCE DAMAGE
FIRE/EXPLOSION AS PRIMARY CAUSE 8 0.6% 0 2 $10,986,012 0.6%
VEHICLE NOT ENGAGED IN EXCAVATION 29 2.3% 0 10 $14,372,480 0.8%
MARITIME EQUIPMENT OR VESSEL ADRIFT 1 0.0% 0 0 $97,995 0.0%
FISHING OR MARITIME ACTIVITY 1 0.0% 0 0 $311,120 0.0%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 1 0.0% 0 0 $145,004 0.0%
PREVIOUS MECHANICAL DAMAGE 5 0.4% 0 1 $1,804,244 0.1%
INTENTIONAL DAMAGE 1 0.0% 0 0 $84,384 0.0%
OTHER OUTSIDE FORCE DAMAGE 5 0.4% 0 0 $27,142,891 1.5%
UNSPECIFIED OUTSIDE FORCE DAMAGE 1 0.0% 0 0 $667,062 0.0%
Sub Total 52 4.2% 0 13 $55,611,194 3.2%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 135 10.9% 3 44 $107,755,487 6.2%
UNKNOWN CAUSE 14 1.1% 0 1 $11,303,522 0.6%
Sub Total 149 12.0% 3 45 $119,059,009 6.9%
Totals 946 76.4% 39 188 $1,301,413,205 75.7%
National, Gas Transmission Onshore, 1994-2013
National Gas Transmission Offshore: Significant Incident Details: 1994-2013
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 9 0.7% 0 0 $1,881,052 0.1%
INTERNAL CORROSION 113 9.1% 0 0 $45,756,413 2.6%
Sub Total 122 9.8% 0 0 $47,637,465 2.7%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 1 0.0% 0 0 $4,086,201 0.2%
THIRD PARTY EXCAVATION DAMAGE 21 1.7% 0 7 $20,907,187 1.2%
Sub Total 22 1.7% 0 7 $24,993,389 1.4%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 1 0.0% 0 0 $438,046 0.0%
Sub Total 1 0.0% 0 0 $438,046 0.0%
MAT'L/WELD/EQUIP FAILURE
CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED 2 0.1% 0 0 $2,621,793 0.1%
MANUFACTURING-RELATED 2 0.1% 0 0 $1,158,872 0.0%
ENVIRONMENTAL CRACKING-RELATED 1 0.0% 0 0 $331,261 0.0%
BODY OF PIPE 1 0.0% 0 0 $116,929 0.0%
BUTT WELD 3 0.2% 0 0 $1,022,353 0.0%
JOINT/FITTING/COMPONENT 13 1.0% 0 0 $6,300,192 0.3%
THREADED CONNECTION/COUPLING FAILURE 2 0.1% 0 0 $412,648 0.0%
OTHER EQUIPMENT FAILURE 2 0.1% 0 0 $494,096 0.0%
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 8 0.6% 0 0 $1,996,997 0.1%
Sub Total 34 2.7% 0 0 $14,455,144 0.8%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 5 0.4% 0 0 $5,023,208 0.2%
HEAVY RAINS/FLOODS 53 4.2% 0 0 $228,569,818 13.3%
HIGH WINDS 4 0.3% 0 0 $30,355,942 1.7%
OTHER NATURAL FORCE DAMAGE 1 0.0% 0 0 $279,761 0.0%
UNSPECIFIED NATURAL FORCE DAMAGE 3 0.2% 0 0 $908,618 0.0%
Sub Total 66 5.3% 0 0 $265,137,350 15.4%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 16 1.2% 0 0 $32,869,568 1.9%
FISHING OR MARITIME ACTIVITY 5 0.4% 0 0 $4,237,100 0.2%
PREVIOUS MECHANICAL DAMAGE 1 0.0% 0 0 $1,808,504 0.1%
OTHER OUTSIDE FORCE DAMAGE 1 0.0% 0 0 $369,952 0.0%
Sub Total 23 1.8% 0 0 $39,285,125 2.2%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 18 1.4% 2 0 $23,711,951 1.3%
UNKNOWN CAUSE 6 0.4% 0 0 $1,628,879 0.0%
Sub Total 24 1.9% 2 0 $25,340,830 1.4%
Totals 292 23.5% 2 7 $417,287,352 24.2%
National, Gas Transmission Offshore, 1994-2013
National Gas Gathering: Significant Incident Details: 1994-2013
Reported Cause of Incident (B) Number % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 6 4.2% 0 0 $2,426,488 0.6%
INTERNAL CORROSION 74 52.1% 0 3 $43,330,754 10.7%
UNSPECIFIED CORROSION 1 0.7% 0 0 $961,994 0.2%
Sub Total 81 57.0% 0 3 $46,719,236 11.6%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE 6 4.2% 0 0 $11,711,882 2.9%
Sub Total 6 4.2% 0 0 $11,711,882 2.9%
INCORRECT OPERATION
UNSPECIFIED INCORRECT OPERATION 2 1.4% 0 3 $24,135 0.0%
Sub Total 2 1.4% 0 3 $24,135 0.0%
MAT'L/WELD/EQUIP FAILURE
JOINT/FITTING/COMPONENT 7 4.9% 0 1 $21,427,976 5.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 3 2.1% 0 0 $315,786 0.0%
THREADED CONNECTION/COUPLING FAILURE 5 3.5% 0 0 $2,534,603 0.6%
NON-THREADED CONNECTION FAILURE 1 0.7% 0 0 $151,373 0.0%
OTHER EQUIPMENT FAILURE 2 1.4% 0 0 $495,060 0.1%
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 4 2.8% 0 2 $1,066,625 0.2%
Sub Total 22 15.4% 0 3 $25,991,426 6.4%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 6 4.2% 0 0 $205,196,975 51.0%
HEAVY RAINS/FLOODS 6 4.2% 0 0 $14,808,773 3.6%
HIGH WINDS 3 2.1% 0 0 $47,438,695 11.8%
Sub Total 15 10.5% 0 0 $267,444,444 66.5%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 3 2.1% 0 1 $5,290,923 1.3%
PREVIOUS MECHANICAL DAMAGE 1 0.7% 0 0 $1,861,255 0.4%
OTHER OUTSIDE FORCE DAMAGE 1 0.7% 0 0 $432,593 0.1%
Sub Total 5 3.5% 0 1 $7,584,772 1.8%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 10 7.0% 0 0 $42,299,632 10.5%
UNKNOWN CAUSE 1 0.7% 0 0 $333,473 0.0%
Sub Total 11 7.7% 0 0 $42,633,105 10.6%
Totals 142 100.0% 0 10 $402,109,002 100.0%
National, Gas Gathering, 1994-2013
National Gas Distribution: Significant Incident Details: 1994-2013
Reported Cause of Incident (B) Number (C) % Fatalities Injuries Property Damage (D) (E) % of Property Damage
CORROSION
EXTERNAL CORROSION 47 3.0% 8 38 $9,326,881 0.8%
INTERNAL CORROSION 2 0.1% 0 1 $571,806 0.0%
UNSPECIFIED CORROSION 6 0.3% 1 11 $1,120,191 0.1%
Sub Total 55 3.6% 9 50 $11,018,880 1.0%
EXCAVATION DAMAGE
OPERATOR/CONTRACTOR EXCAVATION DAMAGE 31 2.0% 2 29 $4,194,686 0.4%
THIRD PARTY EXCAVATION DAMAGE 532 34.8% 113 372 $182,226,756 17.4%
PREVIOUS DAMAGE DUE TO EXCAVATION 1 0.0% 0 4 $185,739 0.0%
Sub Total 564 36.9% 115 405 $186,607,182 17.8%
INCORRECT OPERATION
DAMAGE BY OPERATOR OR OPERATOR'S CONTRACTOR 3 0.2% 1 18 $1,367,742 0.1%
INCORRECT VALVE POSITION 3 0.2% 0 0 $5,434,495 0.5%
INCORRECT INSTALLATION 2 0.1% 0 1 $210,189 0.0%
OTHER INCORRECT OPERATION 13 0.8% 1 14 $2,101,551 0.2%
UNSPECIFIED INCORRECT OPERATION 89 5.8% 7 98 $12,267,413 1.1%
Sub Total 110 7.2% 9 131 $21,381,392 2.0%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE 13 0.8% 3 18 $3,633,258 0.3%
BUTT WELD 1 0.0% 0 0 $380,283 0.0%
FUSION JOINT 2 0.1% 0 1 $171,593 0.0%
COMPRESSION FITTING 1 0.0% 0 0 $489,675 0.0%
MECHANICAL FITTING 3 0.2% 1 1 $1,363,703 0.1%
JOINT/FITTING/COMPONENT 17 1.1% 2 4 $4,725,589 0.4%
OTHER PIPE/WELD/JOINT FAILURE 3 0.2% 0 2 $350,480 0.0%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT 13 0.8% 0 2 $4,836,849 0.4%
VALVE 4 0.2% 0 0 $1,514,112 0.1%
THREADED CONNECTION/COUPLING FAILURE 1 0.0% 0 1 $3,681 0.0%
NON-THREADED CONNECTION FAILURE 4 0.2% 0 1 $2,109,862 0.2%
UNSPECIFIED MAT'L/WELD/EQUIP FAILURE 30 1.9% 1 36 $4,158,496 0.4%
Sub Total 92 6.0% 7 66 $23,737,586 2.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT 68 4.4% 3 42 $21,126,889 2.0%
HEAVY RAINS/FLOODS 21 1.3% 0 1 $554,469,228 52.9%
LIGHTNING 7 0.4% 4 2 $1,533,080 0.1%
TEMPERATURE 45 2.9% 5 29 $10,308,271 0.9%
HIGH WINDS 5 0.3% 1 0 $2,189,725 0.2%
OTHER NATURAL FORCE DAMAGE 3 0.2% 1 2 $1,636,268 0.1%
Sub Total 149 9.7% 14 76 $591,263,463 56.4%
OTHER OUTSIDE FORCE DAMAGE
VEHICLE NOT ENGAGED IN EXCAVATION 104 6.8% 17 49 $23,347,932 2.2%
ELECTRICAL ARCING FROM OTHER EQUIPMENT/FACILITY 5 0.3% 0 5 $1,591,456 0.1%
PREVIOUS MECHANICAL DAMAGE 5 0.3% 0 0 $2,600,805 0.2%
INTENTIONAL DAMAGE 10 0.6% 4 8 $1,688,639 0.1%
OTHER OUTSIDE FORCE DAMAGE 14 0.9% 0 4 $3,621,817 0.3%
UNSPECIFIED OUTSIDE FORCE DAMAGE 63 4.1% 7 9 $27,492,585 2.6%
Sub Total 201 13.1% 28 75 $60,343,236 5.7%
ALL OTHER CAUSES
MISCELLANEOUS CAUSE 270 17.6% 67 188 $126,257,044 12.0%
UNKNOWN CAUSE 86 5.6% 29 69 $26,952,234 2.5%
Sub Total 356 23.3% 96 257 $153,209,279 14.6%
Totals 1,527 100.0% 278 1,060 $1,047,561,022 100.0%
National, Gas Distribution, 1994-2013

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.
  6. Does not include 1,851 injuries that required medical treatment reported for the October, 1994 accidents that were caused by severe flooding near Houston, Texas.

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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