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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 Filtered Incident Files. (1) (2) (3)

More Pipeline Incidents and Mileage Reports are available.

• All Pipeline Systems
• Hazardous Liquid
• Gas Transmission
• Gas Gathering
• Gas Distribution

National All Pipeline Systems: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	24	8.8%	1	3	$12,226,955	9.2%
CORROSION, INTERNAL	32	11.8%	0	0	$15,391,493	11.6%
Sub Total	56	20.7%	1	3	$27,618,448	20.9%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	6	2.2%	0	1	$621,574	0.4%
THIRD PARTY EXCAVATION DAMAGE	36	13.3%	6	9	$11,346,109	8.6%
Sub Total	42	15.5%	6	10	$11,967,684	9.0%
HUMAN ERROR
INCORRECT OPERATION	10	3.7%	0	3	$1,380,114	1.0%
Sub Total	10	3.7%	0	3	$1,380,114	1.0%
MATERIAL FAILURE
BODY OF PIPE	3	1.1%	0	0	$477,487	0.3%
BUTT WELD	9	3.3%	0	0	$2,420,700	1.8%
COMPONENT	9	3.3%	0	1	$3,123,804	2.3%
FILLET WELD	4	1.4%	0	0	$1,226,868	0.9%
JOINT	1	0.3%	0	0	$151,609	0.1%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	9	3.3%	0	0	$1,298,087	0.9%
PIPE SEAM WELD	9	3.3%	0	0	$7,876,523	5.9%
RUPTURED OR LEAKING SEAL/PUMP PACKING	8	2.9%	0	0	$13,558,366	10.2%
THREADS STRIPPED, BROKEN PIPE COUPLING	8	2.9%	0	0	$381,356	0.2%
Sub Total	60	22.2%	0	1	$30,514,804	23.1%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	1	0.3%	0	0	$363,490	0.2%
HEAVY RAINS/FLOODS	5	1.8%	0	0	$13,029,340	9.8%
HIGH WINDS	1	0.3%	0	0	$99,719	0.0%
LIGHTNING	4	1.4%	4	1	$6,117,320	4.6%
Sub Total	11	4.0%	4	1	$19,609,871	14.8%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	19	7.0%	3	4	$9,379,197	7.1%
FIRE/EXPLOSION AS PRIMARY CAUSE	16	5.9%	2	3	$4,103,538	3.1%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	5	1.8%	0	0	$9,068,775	6.8%
VANDALISM	1	0.3%	0	0	$40,878	0.0%
Sub Total	41	15.1%	5	7	$22,592,389	17.1%
ALL OTHER CAUSES
MISCELLANEOUS	27	10.0%	0	6	$11,287,859	8.5%
UNKNOWN	23	8.5%	3	2	$6,845,893	5.1%
Sub Total	50	18.5%	3	8	$18,133,753	13.7%
Totals	270	100.0%	19	33	$131,817,066	100.0%

• All Hazardous Liquid Systems
• Onshore Only
• Offshore Only

National Hazardous Liquid: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	14	13.0%	0	2	$9,541,584	15.4%
CORROSION, INTERNAL	18	16.8%	0	0	$5,120,344	8.2%
Sub Total	32	29.9%	0	2	$14,661,929	23.7%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	3	2.8%	0	0	$384,819	0.6%
THIRD PARTY EXCAVATION DAMAGE	10	9.3%	0	0	$3,322,656	5.3%
Sub Total	13	12.1%	0	0	$3,707,475	6.0%
HUMAN ERROR
INCORRECT OPERATION	5	4.6%	0	0	$142,084	0.2%
Sub Total	5	4.6%	0	0	$142,084	0.2%
MATERIAL FAILURE
BODY OF PIPE	1	0.9%	0	0	$199,323	0.3%
BUTT WELD	2	1.8%	0	0	$663,122	1.0%
COMPONENT	2	1.8%	0	0	$284,671	0.4%
FILLET WELD	4	3.7%	0	0	$1,226,868	1.9%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	6	5.6%	0	0	$490,921	0.7%
PIPE SEAM WELD	6	5.6%	0	0	$6,960,334	11.2%
RUPTURED OR LEAKING SEAL/PUMP PACKING	5	4.6%	0	0	$2,102,636	3.4%
THREADS STRIPPED, BROKEN PIPE COUPLING	7	6.5%	0	0	$228,062	0.3%
Sub Total	33	30.8%	0	0	$12,155,940	19.6%
NATURAL FORCE DAMAGE
HEAVY RAINS/FLOODS	2	1.8%	0	0	$10,762,841	17.4%
LIGHTNING	3	2.8%	0	0	$6,117,320	9.8%
Sub Total	5	4.6%	0	0	$16,880,161	27.3%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	2	1.8%	0	0	$6,249,663	10.1%
FIRE/EXPLOSION AS PRIMARY CAUSE	1	0.9%	0	0	$10,219	0.0%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	2	1.8%	0	0	$5,682,528	9.1%
VANDALISM	1	0.9%	0	0	$40,878	0.0%
Sub Total	6	5.6%	0	0	$11,983,289	19.3%
ALL OTHER CAUSES
MISCELLANEOUS	11	10.2%	0	0	$1,491,527	2.4%
UNKNOWN	2	1.8%	0	0	$800,399	1.2%
Sub Total	13	12.1%	0	0	$2,291,926	3.7%
Totals	107	100.0%	0	2	$61,822,807	100.0%

National Hazardous Liquid Onshore: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	14	13.0%	0	2	$9,541,584	15.4%
CORROSION, INTERNAL	18	16.8%	0	0	$5,120,344	8.2%
Sub Total	32	29.9%	0	2	$14,661,929	23.7%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	3	2.8%	0	0	$384,819	0.6%
THIRD PARTY EXCAVATION DAMAGE	10	9.3%	0	0	$3,322,656	5.3%
Sub Total	13	12.1%	0	0	$3,707,475	6.0%
HUMAN ERROR
INCORRECT OPERATION	5	4.6%	0	0	$142,084	0.2%
Sub Total	5	4.6%	0	0	$142,084	0.2%
MATERIAL FAILURE
BODY OF PIPE	1	0.9%	0	0	$199,323	0.3%
BUTT WELD	2	1.8%	0	0	$663,122	1.0%
COMPONENT	2	1.8%	0	0	$284,671	0.4%
FILLET WELD	4	3.7%	0	0	$1,226,868	1.9%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	6	5.6%	0	0	$490,921	0.7%
PIPE SEAM WELD	6	5.6%	0	0	$6,960,334	11.2%
RUPTURED OR LEAKING SEAL/PUMP PACKING	5	4.6%	0	0	$2,102,636	3.4%
THREADS STRIPPED, BROKEN PIPE COUPLING	7	6.5%	0	0	$228,062	0.3%
Sub Total	33	30.8%	0	0	$12,155,940	19.6%
NATURAL FORCE DAMAGE
HEAVY RAINS/FLOODS	1	0.9%	0	0	$1,054,152	1.7%
LIGHTNING	3	2.8%	0	0	$6,117,320	9.8%
Sub Total	4	3.7%	0	0	$7,171,472	11.6%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	1	0.9%	0	0	$725,592	1.1%
FIRE/EXPLOSION AS PRIMARY CAUSE	1	0.9%	0	0	$10,219	0.0%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	2	1.8%	0	0	$5,682,528	9.1%
VANDALISM	1	0.9%	0	0	$40,878	0.0%
Sub Total	5	4.6%	0	0	$6,459,218	10.4%
ALL OTHER CAUSES
MISCELLANEOUS	11	10.2%	0	0	$1,491,527	2.4%
UNKNOWN	1	0.9%	0	0	$184,157	0.3%
Sub Total	12	11.2%	0	0	$1,675,684	2.7%
Totals	104	97.2%	0	2	$45,973,805	74.3%

National Hazardous Liquid Offshore: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
NATURAL FORCE DAMAGE
HEAVY RAINS/FLOODS	1	0.9%	0	0	$9,708,688	15.7%
Sub Total	1	0.9%	0	0	$9,708,688	15.7%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	1	0.9%	0	0	$5,524,071	8.9%
Sub Total	1	0.9%	0	0	$5,524,071	8.9%
ALL OTHER CAUSES
UNKNOWN	1	0.9%	0	0	$616,242	1.0%
Sub Total	1	0.9%	0	0	$616,242	1.0%
Totals	3	2.8%	0	0	$15,849,002	25.6%

• All Gas Transmission Systems
• Onshore Only
• Offshore Only

National Gas Transmission: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	7	8.8%	0	0	$2,511,130	6.4%
CORROSION, INTERNAL	8	10.1%	0	0	$2,945,393	7.5%
Sub Total	15	18.9%	0	0	$5,456,523	14.0%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	2	2.5%	0	0	$235,494	0.6%
THIRD PARTY EXCAVATION DAMAGE	7	8.8%	3	0	$3,228,401	8.3%
Sub Total	9	11.3%	3	0	$3,463,895	8.9%
HUMAN ERROR
INCORRECT OPERATION	3	3.8%	0	1	$214,845	0.5%
Sub Total	3	3.8%	0	1	$214,845	0.5%
MATERIAL FAILURE
BODY OF PIPE	2	2.5%	0	0	$278,164	0.7%
BUTT WELD	7	8.8%	0	0	$1,757,577	4.5%
COMPONENT	5	6.3%	0	0	$2,685,647	6.9%
JOINT	1	1.2%	0	0	$151,609	0.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	3	3.8%	0	0	$807,166	2.0%
PIPE SEAM WELD	3	3.8%	0	0	$916,189	2.3%
RUPTURED OR LEAKING SEAL/PUMP PACKING	3	3.8%	0	0	$11,455,730	29.5%
Sub Total	24	30.3%	0	0	$18,052,084	46.4%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	1	1.2%	0	0	$363,490	0.9%
Sub Total	1	1.2%	0	0	$363,490	0.9%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	5	6.3%	0	1	$583,009	1.5%
FIRE/EXPLOSION AS PRIMARY CAUSE	2	2.5%	0	1	$153,294	0.3%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	1	1.2%	0	0	$629,403	1.6%
Sub Total	8	10.1%	0	2	$1,365,707	3.5%
ALL OTHER CAUSES
MISCELLANEOUS	9	11.3%	0	0	$6,056,645	15.6%
UNKNOWN	10	12.6%	0	1	$3,854,209	9.9%
Sub Total	19	24.0%	0	1	$9,910,855	25.5%
Totals	79	100.0%	3	4	$38,827,402	100.0%

National Gas Transmission Onshore: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	7	8.8%	0	0	$2,511,130	6.4%
CORROSION, INTERNAL	4	5.0%	0	0	$1,740,883	4.4%
Sub Total	11	13.9%	0	0	$4,252,013	10.9%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	2	2.5%	0	0	$235,494	0.6%
THIRD PARTY EXCAVATION DAMAGE	7	8.8%	3	0	$3,228,401	8.3%
Sub Total	9	11.3%	3	0	$3,463,895	8.9%
HUMAN ERROR
INCORRECT OPERATION	3	3.8%	0	1	$214,845	0.5%
Sub Total	3	3.8%	0	1	$214,845	0.5%
MATERIAL FAILURE
BODY OF PIPE	2	2.5%	0	0	$278,164	0.7%
BUTT WELD	6	7.5%	0	0	$1,543,185	3.9%
COMPONENT	1	1.2%	0	0	$140,108	0.3%
JOINT	1	1.2%	0	0	$151,609	0.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	3	3.8%	0	0	$807,166	2.0%
PIPE SEAM WELD	3	3.8%	0	0	$916,189	2.3%
RUPTURED OR LEAKING SEAL/PUMP PACKING	3	3.8%	0	0	$11,455,730	29.5%
Sub Total	19	24.0%	0	0	$15,292,152	39.3%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	1	1.2%	0	0	$363,490	0.9%
Sub Total	1	1.2%	0	0	$363,490	0.9%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	3	3.8%	0	1	$261,411	0.6%
FIRE/EXPLOSION AS PRIMARY CAUSE	2	2.5%	0	1	$153,294	0.3%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	1	1.2%	0	0	$629,403	1.6%
Sub Total	6	7.5%	0	2	$1,044,109	2.6%
ALL OTHER CAUSES
MISCELLANEOUS	5	6.3%	0	0	$1,789,312	4.6%
UNKNOWN	6	7.5%	0	1	$2,608,954	6.7%
Sub Total	11	13.9%	0	1	$4,398,267	11.3%
Totals	60	75.9%	3	4	$29,028,775	74.7%

National Gas Transmission Offshore: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, INTERNAL	4	5.0%	0	0	$1,204,509	3.1%
Sub Total	4	5.0%	0	0	$1,204,509	3.1%
MATERIAL FAILURE
BUTT WELD	1	1.2%	0	0	$214,392	0.5%
COMPONENT	4	5.0%	0	0	$2,545,539	6.5%
Sub Total	5	6.3%	0	0	$2,759,931	7.1%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	2	2.5%	0	0	$321,598	0.8%
Sub Total	2	2.5%	0	0	$321,598	0.8%
ALL OTHER CAUSES
MISCELLANEOUS	4	5.0%	0	0	$4,267,333	10.9%
UNKNOWN	4	5.0%	0	0	$1,245,254	3.2%
Sub Total	8	10.1%	0	0	$5,512,588	14.2%
Totals	19	24.0%	0	0	$9,798,627	25.2%

National Gas Gathering: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, INTERNAL	6	50.0%	0	0	$7,325,755	64.8%
Sub Total	6	50.0%	0	0	$7,325,755	64.8%
MATERIAL FAILURE
COMPONENT	2	16.6%	0	1	$153,485	1.3%
THREADS STRIPPED, BROKEN PIPE COUPLING	1	8.3%	0	0	$153,294	1.3%
Sub Total	3	25.0%	0	1	$306,779	2.7%
OTHER OUTSIDE FORCE DAMAGE
RUPTURE OF PREVIOUSLY DAMAGED PIPE	1	8.3%	0	0	$1,832,941	16.2%
Sub Total	1	8.3%	0	0	$1,832,941	16.2%
ALL OTHER CAUSES
MISCELLANEOUS	1	8.3%	0	0	$1,532,941	13.5%
UNKNOWN	1	8.3%	0	0	$306,368	2.7%
Sub Total	2	16.6%	0	0	$1,839,309	16.2%
Totals	12	100.0%	0	1	$11,304,786	100.0%

National Gas Distribution: Significant Incident Details: 2006

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	3	4.1%	1	1	$174,239	0.8%
Sub Total	3	4.1%	1	1	$174,239	0.8%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	1	1.3%	0	1	$1,260	0.0%
THIRD PARTY EXCAVATION DAMAGE	19	26.3%	3	9	$4,795,052	24.1%
Sub Total	20	27.7%	3	10	$4,796,313	24.1%
HUMAN ERROR
INCORRECT OPERATION	2	2.7%	0	2	$1,023,184	5.1%
Sub Total	2	2.7%	0	2	$1,023,184	5.1%
NATURAL FORCE DAMAGE
HEAVY RAINS/FLOODS	3	4.1%	0	0	$2,266,499	11.4%
HIGH WINDS	1	1.3%	0	0	$99,719	0.5%
LIGHTNING	1	1.3%	4	1	$0	0.0%
Sub Total	5	6.9%	4	1	$2,366,219	11.9%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	12	16.6%	3	3	$2,546,524	12.8%
FIRE/EXPLOSION AS PRIMARY CAUSE	13	18.0%	2	2	$3,940,024	19.8%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	1	1.3%	0	0	$923,902	4.6%
Sub Total	26	36.1%	5	5	$7,410,451	37.3%
ALL OTHER CAUSES
MISCELLANEOUS	6	8.3%	0	6	$2,206,745	11.1%
UNKNOWN	10	13.8%	3	1	$1,884,915	9.4%
Sub Total	16	22.2%	3	7	$4,091,661	20.6%
Totals	72	100.0%	16	26	$19,862,069	100.0%

Notes

1. Significant Incidents are those incidents reported by pipeline operators with 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
2. Costs in the current year (2008) are nominal (as reported). The costs for incidents prior to 2008 are presented in 2007 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.
3. 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. All costs prior to 2008 are expressed in 2007 dollars. Costs in current year (2008) are nominal.

Sources

1. PHMSA Hazardous Liquid Filtered Incidents File - August 25, 2008
2. PHMSA Gas Transmission Filtered Incidents File - August 25, 2008
3. PHMSA Gas Distribution Filtered Incidents File - August 25, 2008

See Pipeline Incidents and Mileage Reports for more pipeline safety reports.