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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: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
VARIOUS	60	21.5%	1	5	$5,101,569	6.6%
Sub Total	60	21.5%	1	5	$5,101,569	6.6%
EXCAVATION DAMAGE
VARIOUS	92	32.9%	7	38	$18,615,620	24.2%
Sub Total	92	32.9%	7	38	$18,615,620	24.2%
HUMAN ERROR
VARIOUS	15	5.3%	1	12	$184,979	0.2%
Sub Total	15	5.3%	1	12	$184,979	0.2%
MATERIAL FAILURE
VARIOUS	38	13.6%	2	7	$23,192,976	30.2%
Sub Total	38	13.6%	2	7	$23,192,976	30.2%
NATURAL FORCE DAMAGE
VARIOUS	20	7.1%	1	12	$5,158,655	6.7%
Sub Total	20	7.1%	1	12	$5,158,655	6.7%
ALL OTHER CAUSES
VARIOUS	54	19.3%	2	24	$24,406,286	31.8%
Sub Total	54	19.3%	2	24	$24,406,286	31.8%
Totals	279	100.0%	14	98	$76,660,087	100.0%

• All Hazardous Liquid Systems
• Onshore Only
• Offshore Only

National Hazardous Liquid: Significant Incident Details: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
VARIOUS	47	28.3%	0	0	$2,505,806	4.8%
Sub Total	47	28.3%	0	0	$2,505,806	4.8%
EXCAVATION DAMAGE
VARIOUS	42	25.3%	0	1	$9,990,979	19.3%
Sub Total	42	25.3%	0	1	$9,990,979	19.3%
HUMAN ERROR
VARIOUS	11	6.6%	0	5	$150,201	0.2%
Sub Total	11	6.6%	0	5	$150,201	0.2%
MATERIAL FAILURE
VARIOUS	31	18.6%	0	0	$14,454,483	27.9%
Sub Total	31	18.6%	0	0	$14,454,483	27.9%
NATURAL FORCE DAMAGE
VARIOUS	5	3.0%	0	0	$2,326,787	4.5%
Sub Total	5	3.0%	0	0	$2,326,787	4.5%
ALL OTHER CAUSES
VARIOUS	30	18.0%	0	3	$22,266,769	43.0%
Sub Total	30	18.0%	0	3	$22,266,769	43.0%
Totals	166	100.0%	0	9	$51,695,028	100.0%

National Hazardous Liquid Onshore: Significant Incident Details: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
VARIOUS	47	28.3%	0	0	$2,505,806	4.8%
Sub Total	47	28.3%	0	0	$2,505,806	4.8%
EXCAVATION DAMAGE
VARIOUS	41	24.7%	0	1	$9,086,762	17.5%
Sub Total	41	24.7%	0	1	$9,086,762	17.5%
HUMAN ERROR
VARIOUS	11	6.6%	0	5	$150,201	0.2%
Sub Total	11	6.6%	0	5	$150,201	0.2%
MATERIAL FAILURE
VARIOUS	31	18.6%	0	0	$14,454,483	27.9%
Sub Total	31	18.6%	0	0	$14,454,483	27.9%
NATURAL FORCE DAMAGE
VARIOUS	5	3.0%	0	0	$2,326,787	4.5%
Sub Total	5	3.0%	0	0	$2,326,787	4.5%
ALL OTHER CAUSES
VARIOUS	30	18.0%	0	3	$22,266,769	43.0%
Sub Total	30	18.0%	0	3	$22,266,769	43.0%
Totals	165	99.4%	0	9	$50,790,811	98.2%

National Hazardous Liquid Offshore: Significant Incident Details: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
EXCAVATION DAMAGE
VARIOUS	1	0.6%	0	0	$904,217	1.7%
Sub Total	1	0.6%	0	0	$904,217	1.7%
Totals	1	0.6%	0	0	$904,217	1.7%

• All Gas Transmission Systems
• Onshore Only
• Offshore Only

National Gas Transmission: Significant Incident Details: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
VARIOUS	7	24.1%	0	0	$2,213,209	14.9%
Sub Total	7	24.1%	0	0	$2,213,209	14.9%
EXCAVATION DAMAGE
VARIOUS	12	41.3%	0	5	$2,466,644	16.7%
Sub Total	12	41.3%	0	5	$2,466,644	16.7%
MATERIAL FAILURE
VARIOUS	2	6.9%	0	0	$8,446,361	57.2%
Sub Total	2	6.9%	0	0	$8,446,361	57.2%
NATURAL FORCE DAMAGE
VARIOUS	2	6.9%	0	0	$466,019	3.1%
Sub Total	2	6.9%	0	0	$466,019	3.1%
ALL OTHER CAUSES
VARIOUS	6	20.6%	0	6	$1,172,700	7.9%
Sub Total	6	20.6%	0	6	$1,172,700	7.9%
Totals	29	100.0%	0	11	$14,764,934	100.0%

National Gas Transmission Onshore: Significant Incident Details: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
VARIOUS	5	17.2%	0	0	$1,904,662	12.9%
Sub Total	5	17.2%	0	0	$1,904,662	12.9%
EXCAVATION DAMAGE
VARIOUS	12	41.3%	0	5	$2,466,644	16.7%
Sub Total	12	41.3%	0	5	$2,466,644	16.7%
MATERIAL FAILURE
VARIOUS	2	6.9%	0	0	$8,446,361	57.2%
Sub Total	2	6.9%	0	0	$8,446,361	57.2%
NATURAL FORCE DAMAGE
VARIOUS	2	6.9%	0	0	$466,019	3.1%
Sub Total	2	6.9%	0	0	$466,019	3.1%
ALL OTHER CAUSES
VARIOUS	6	20.6%	0	6	$1,172,700	7.9%
Sub Total	6	20.6%	0	6	$1,172,700	7.9%
Totals	27	93.1%	0	11	$14,456,387	97.9%

National Gas Transmission Offshore: Significant Incident Details: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
VARIOUS	2	6.9%	0	0	$308,546	2.0%
Sub Total	2	6.9%	0	0	$308,546	2.0%
Totals	2	6.9%	0	0	$308,546	2.0%

National Gas Gathering: Significant Incident Details: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
EXCAVATION DAMAGE
VARIOUS	3	75.0%	0	1	$343,880	45.1%
Sub Total	3	75.0%	0	1	$343,880	45.1%
NATURAL FORCE DAMAGE
VARIOUS	1	25.0%	0	0	$417,330	54.8%
Sub Total	1	25.0%	0	0	$417,330	54.8%
Totals	4	100.0%	0	1	$761,211	100.0%

National Gas Distribution: Significant Incident Details: 1991

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
VARIOUS	6	7.5%	1	5	$382,553	4.0%
Sub Total	6	7.5%	1	5	$382,553	4.0%
EXCAVATION DAMAGE
VARIOUS	35	43.7%	7	31	$5,814,115	61.6%
Sub Total	35	43.7%	7	31	$5,814,115	61.6%
HUMAN ERROR
VARIOUS	4	5.0%	1	7	$34,777	0.3%
Sub Total	4	5.0%	1	7	$34,777	0.3%
MATERIAL FAILURE
VARIOUS	5	6.2%	2	7	$292,131	3.1%
Sub Total	5	6.2%	2	7	$292,131	3.1%
NATURAL FORCE DAMAGE
VARIOUS	12	15.0%	1	12	$1,948,518	20.6%
Sub Total	12	15.0%	1	12	$1,948,518	20.6%
ALL OTHER CAUSES
VARIOUS	18	22.5%	2	15	$966,816	10.2%
Sub Total	18	22.5%	2	15	$966,816	10.2%
Totals	80	100.0%	14	77	$9,438,913	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.