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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: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	187	3.1%	3	24	$213,197,247	5.8%
CORROSION, INTERNAL	179	3.0%	0	1	$75,215,023	2.0%
VARIOUS	708	11.8%	27	75	$262,693,045	7.1%
Sub Total	1,074	18.0%	30	100	$551,105,316	15.0%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	49	0.8%	1	9	$11,835,536	0.3%
THIRD PARTY EXCAVATION DAMAGE	241	4.0%	18	40	$80,427,675	2.1%
VARIOUS	1,262	21.1%	128	570	$425,474,054	11.6%
Sub Total	1,552	26.0%	147	619	$517,737,266	14.1%
HUMAN ERROR
INCORRECT OPERATION	82	1.3%	8	27	$13,814,491	0.3%
VARIOUS	231	3.8%	4	120	$30,411,428	0.8%
Sub Total	313	5.2%	12	147	$44,225,920	1.2%
MATERIAL FAILURE
BODY OF PIPE	43	0.7%	0	5	$27,559,555	0.7%
BUTT WELD	37	0.6%	0	0	$34,309,072	0.9%
COMPONENT	68	1.1%	0	4	$34,956,530	0.9%
FILLET WELD	19	0.3%	0	0	$22,423,108	0.6%
JOINT	36	0.6%	2	1	$9,524,723	0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	64	1.0%	0	2	$8,258,997	0.2%
PIPE SEAM WELD	47	0.7%	0	0	$50,055,957	1.3%
RUPTURED OR LEAKING SEAL/PUMP PACKING	55	0.9%	0	1	$19,526,515	0.5%
THREADS STRIPPED, BROKEN PIPE COUPLING	34	0.5%	0	4	$7,166,608	0.2%
VARIOUS	517	8.6%	8	121	$251,795,764	6.8%
Sub Total	920	15.4%	10	138	$465,576,833	12.7%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	36	0.6%	0	(D) 5	$238,689,851	6.5%
HEAVY RAINS/FLOODS	81	1.3%	0	(D) 1	$668,052,273	18.2%
HIGH WINDS	29	0.4%	1	(D) 3	$255,454,944	6.9%
LIGHTNING	24	0.4%	4	(D) 1	$25,349,668	0.6%
TEMPERATURE	16	0.2%	3	(D) 1	$8,068,405	0.2%
VARIOUS	318	5.3%	24	(D) 109	$186,414,894	5.0%
Sub Total	504	8.4%	32	120	$1,382,030,037	37.7%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	103	1.7%	7	28	$74,902,287	2.0%
FIRE/EXPLOSION AS PRIMARY CAUSE	102	1.7%	3	11	$45,953,050	1.2%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	15	0.2%	0	1	$23,409,939	0.6%
VANDALISM	11	0.1%	3	7	$1,525,641	0.0%
Sub Total	231	3.8%	13	47	$145,790,918	3.9%
ALL OTHER CAUSES
MISCELLANEOUS	130	2.1%	3	23	$44,028,372	1.2%
UNKNOWN	112	1.8%	18	49	$80,194,141	2.1%
VARIOUS	1,124	18.8%	156	537	$434,272,839	11.8%
Sub Total	1,366	22.9%	177	609	$558,495,353	15.2%
Totals	5,960	100.0%	421	1,780	$3,664,961,647	100.0%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	96	18	14	97	0	58	37
1989	76	19	17	92	0	41	32
1990	62	20	14	75	0	40	42
1991	54	20	15	92	0	60	38
1992	80	16	14	89	0	42	43
1993	78	24	18	89	0	44	40
1994	87	40	16	75	0	54	54
1995	55	26	30	76	0	38	34
1996	75	15	16	97	0	63	35
1997	78	18	13	72	0	59	27
1998	76	25	12	87	0	56	39
1999	90	14	19	76	0	40	36
2000	95	12	13	81	0	58	31
2001	59	14	12	80	0	50	18
2002	38	21	15	55	10	57	62
2003	48	28	15	81	13	47	64
2004	36	46	13	67	39	65	64
2005	38	77	18	45	55	52	73
2006	50	11	10	42	41	56	61
2007	55	16	10	57	33	65	48

• All Hazardous Liquid Systems
• Onshore Only
• Offshore Only

National Hazardous Liquid: Significant Incident Details: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	118	4.0%	0	15	$73,153,501	4.9%
CORROSION, INTERNAL	80	2.7%	0	0	$14,609,854	0.9%
VARIOUS	494	16.8%	1	2	$202,938,067	13.7%
Sub Total	692	23.5%	1	17	$290,701,422	19.6%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	32	1.0%	0	1	$9,450,209	0.6%
THIRD PARTY EXCAVATION DAMAGE	86	2.9%	5	6	$32,192,211	2.1%
VARIOUS	517	17.6%	9	80	$178,653,319	12.0%
Sub Total	635	21.6%	14	87	$220,295,740	14.9%
HUMAN ERROR
INCORRECT OPERATION	45	1.5%	4	4	$6,077,892	0.4%
VARIOUS	157	5.3%	1	23	$27,177,100	1.8%
Sub Total	202	6.8%	5	27	$33,254,993	2.2%
MATERIAL FAILURE
BODY OF PIPE	20	0.6%	0	0	$14,346,837	0.9%
BUTT WELD	17	0.5%	0	0	$21,417,728	1.4%
COMPONENT	41	1.4%	0	1	$19,664,315	1.3%
FILLET WELD	14	0.4%	0	0	$20,216,887	1.3%
JOINT	16	0.5%	0	0	$4,257,738	0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	37	1.2%	0	0	$2,059,629	0.1%
PIPE SEAM WELD	33	1.1%	0	0	$46,033,688	3.1%
RUPTURED OR LEAKING SEAL/PUMP PACKING	50	1.7%	0	0	$7,920,784	0.5%
THREADS STRIPPED, BROKEN PIPE COUPLING	24	0.8%	0	0	$2,666,168	0.1%
VARIOUS	334	11.3%	0	3	$193,243,649	13.0%
Sub Total	586	19.9%	0	4	$331,827,427	22.4%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	11	0.3%	0	(D) 0	$53,201,401	3.6%
HEAVY RAINS/FLOODS	11	0.3%	0	(D) 0	$52,797,644	3.5%
HIGH WINDS	12	0.4%	0	(D) 0	$71,475,008	4.8%
LIGHTNING	17	0.5%	0	(D) 0	$23,268,854	1.5%
TEMPERATURE	10	0.3%	0	(D) 0	$6,991,170	0.4%
VARIOUS	58	1.9%	0	(D) 1	$78,679,361	5.3%
Sub Total	119	4.0%	0	1	$286,413,439	19.3%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	14	0.4%	0	0	$24,880,665	1.6%
FIRE/EXPLOSION AS PRIMARY CAUSE	5	0.1%	0	0	$3,057,021	0.2%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	8	0.2%	0	0	$16,392,073	1.1%
VANDALISM	6	0.2%	0	1	$994,831	0.0%
Sub Total	33	1.1%	0	1	$45,324,593	3.0%
ALL OTHER CAUSES
MISCELLANEOUS	61	2.0%	0	1	$13,505,714	0.9%
UNKNOWN	26	0.8%	3	7	$37,143,863	2.5%
VARIOUS	584	19.8%	18	88	$220,014,493	14.8%
Sub Total	671	22.8%	21	96	$270,664,071	18.3%
Totals	2,938	100.0%	41	233	$1,478,481,688	100.0%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	39	1	12	50	0	45	20
1989	31	3	11	41	0	27	23
1990	41	2	10	34	0	27	26
1991	30	5	11	42	0	47	31
1992	46	1	11	49	0	34	29
1993	39	5	11	47	0	28	24
1994	54	13	9	29	0	30	43
1995	33	10	24	35	0	32	22
1996	44	2	10	42	0	53	23
1997	46	4	10	36	0	46	20
1998	39	7	6	32	0	34	22
1999	60	2	14	25	0	24	22
2000	40	0	9	34	0	31	21
2001	36	3	9	21	0	33	6
2002	13	5	8	24	5	36	42
2003	13	7	7	18	5	29	41
2004	12	16	4	22	6	36	38
2005	13	17	8	12	6	28	43
2006	13	5	5	13	6	32	34
2007	18	8	8	17	4	23	28

National Hazardous Liquid Onshore: Significant Incident Details: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	115	3.9%	0	15	$72,023,123	4.8%
CORROSION, INTERNAL	80	2.7%	0	0	$14,609,854	0.9%
VARIOUS	479	16.3%	1	2	$199,541,727	13.5%
Sub Total	674	22.9%	1	17	$286,174,704	19.3%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	32	1.0%	0	1	$9,450,209	0.6%
THIRD PARTY EXCAVATION DAMAGE	86	2.9%	5	6	$32,192,211	2.1%
VARIOUS	499	16.9%	9	80	$144,415,355	9.7%
Sub Total	617	21.0%	14	87	$186,057,776	12.5%
HUMAN ERROR
INCORRECT OPERATION	45	1.5%	4	4	$6,077,892	0.4%
VARIOUS	157	5.3%	1	23	$27,177,100	1.8%
Sub Total	202	6.8%	5	27	$33,254,993	2.2%
MATERIAL FAILURE
BODY OF PIPE	20	0.6%	0	0	$14,346,837	0.9%
BUTT WELD	17	0.5%	0	0	$21,417,728	1.4%
COMPONENT	39	1.3%	0	1	$6,525,756	0.4%
FILLET WELD	14	0.4%	0	0	$20,216,887	1.3%
JOINT	16	0.5%	0	0	$4,257,738	0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	37	1.2%	0	0	$2,059,629	0.1%
PIPE SEAM WELD	33	1.1%	0	0	$46,033,688	3.1%
RUPTURED OR LEAKING SEAL/PUMP PACKING	49	1.6%	0	0	$7,369,646	0.5%
THREADS STRIPPED, BROKEN PIPE COUPLING	24	0.8%	0	0	$2,666,168	0.1%
VARIOUS	331	11.2%	0	3	$188,607,417	12.7%
Sub Total	580	19.7%	0	4	$313,501,498	21.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	10	0.3%	0	(D) 0	$26,956,497	1.8%
HEAVY RAINS/FLOODS	9	0.3%	0	(D) 0	$42,328,612	2.8%
HIGH WINDS	2	0.0%	0	(D) 0	$15,995,479	1.0%
LIGHTNING	17	0.5%	0	(D) 0	$23,268,854	1.5%
TEMPERATURE	10	0.3%	0	(D) 0	$6,991,170	0.4%
VARIOUS	53	1.8%	0	(D) 1	$63,786,396	4.3%
Sub Total	101	3.4%	0	1	$179,327,009	12.1%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	10	0.3%	0	0	$15,089,624	1.0%
FIRE/EXPLOSION AS PRIMARY CAUSE	5	0.1%	0	0	$3,057,021	0.2%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	8	0.2%	0	0	$16,392,073	1.1%
VANDALISM	6	0.2%	0	1	$994,831	0.0%
Sub Total	29	0.9%	0	1	$35,533,552	2.4%
ALL OTHER CAUSES
MISCELLANEOUS	59	2.0%	0	1	$12,661,849	0.8%
UNKNOWN	24	0.8%	3	7	$17,281,299	1.1%
VARIOUS	567	19.3%	18	88	$208,470,486	14.1%
Sub Total	650	22.1%	21	96	$238,413,636	16.1%
Totals	2,853	97.1%	41	233	$1,272,263,171	86.0%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	39	1	12	48	0	45	19
1989	31	3	11	40	0	27	23
1990	39	2	10	33	0	27	26
1991	30	5	11	41	0	47	31
1992	45	0	11	46	0	34	29
1993	39	5	11	46	0	27	24
1994	54	12	9	29	0	29	43
1995	32	10	24	34	0	32	22
1996	43	2	10	42	0	51	23
1997	43	4	10	33	0	44	19
1998	38	4	6	30	0	31	22
1999	56	2	14	24	0	24	21
2000	37	0	9	32	0	29	21
2001	35	3	9	21	0	30	6
2002	13	5	8	24	4	33	42
2003	13	7	7	18	5	29	41
2004	11	10	4	22	5	36	36
2005	12	11	8	12	5	28	42
2006	12	4	5	13	5	32	34
2007	17	8	8	17	4	22	28

National Hazardous Liquid Offshore: Significant Incident Details: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	3	0.1%	0	0	$1,130,377	0.0%
VARIOUS	15	0.5%	0	0	$3,396,340	0.2%
Sub Total	18	0.6%	0	0	$4,526,718	0.3%
EXCAVATION DAMAGE
VARIOUS	18	0.6%	0	0	$34,237,963	2.3%
Sub Total	18	0.6%	0	0	$34,237,963	2.3%
MATERIAL FAILURE
COMPONENT	2	0.0%	0	0	$13,138,559	0.8%
RUPTURED OR LEAKING SEAL/PUMP PACKING	1	0.0%	0	0	$551,138	0.0%
VARIOUS	3	0.1%	0	0	$4,636,231	0.3%
Sub Total	6	0.2%	0	0	$18,325,929	1.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	1	0.0%	0	(D) 0	$26,244,903	1.7%
HEAVY RAINS/FLOODS	2	0.0%	0	(D) 0	$10,469,032	0.7%
HIGH WINDS	10	0.3%	0	(D) 0	$55,479,529	3.7%
VARIOUS	5	0.1%	0	(D) 0	$14,892,964	1.0%
Sub Total	18	0.6%	0	0	$107,086,429	7.2%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	4	0.1%	0	0	$9,791,040	0.6%
Sub Total	4	0.1%	0	0	$9,791,040	0.6%
ALL OTHER CAUSES
MISCELLANEOUS	3	0.1%	0	0	$939,696	0.0%
UNKNOWN	2	0.0%	0	0	$19,862,563	1.3%
VARIOUS	17	0.5%	0	0	$11,544,007	0.7%
Sub Total	22	0.7%	0	0	$32,346,266	2.1%
Totals	86	2.9%	0	0	$206,314,348	13.9%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	0	0	0	2	0	0	1
1989	0	0	0	1	0	0	0
1990	2	0	0	1	0	0	0
1991	0	0	0	1	0	0	0
1992	1	1	0	3	0	0	0
1993	0	0	0	1	0	1	0
1994	0	1	0	0	0	1	0
1995	1	0	0	1	0	0	0
1996	1	0	0	0	0	2	0
1997	3	0	0	3	0	2	1
1998	1	3	0	2	0	3	0
1999	4	0	0	1	0	0	1
2000	3	0	0	2	0	2	0
2001	1	0	0	0	0	3	0
2002	1	0	0	0	1	3	0
2004	1	6	0	0	1	0	2
2005	1	6	0	0	1	0	1
2006	1	1	0	0	1	0	0
2007	1	0	0	0	0	1	0

• All Gas Transmission Systems
• Onshore Only
• Offshore Only

National Gas Transmission: Significant Incident Details: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	53	4.8%	1	2	$137,645,191	15.1%
CORROSION, INTERNAL	66	6.0%	0	0	$42,500,426	4.6%
VARIOUS	133	12.2%	12	3	$42,743,214	4.7%
Sub Total	252	23.1%	13	5	$222,888,832	24.5%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	10	0.9%	0	2	$1,427,077	0.1%
THIRD PARTY EXCAVATION DAMAGE	56	5.1%	6	4	$15,643,631	1.7%
VARIOUS	170	15.6%	30	69	$101,685,069	11.2%
Sub Total	236	21.6%	36	75	$118,755,777	13.0%
HUMAN ERROR
INCORRECT OPERATION	17	1.5%	0	5	$4,218,790	0.4%
Sub Total	17	1.5%	0	5	$4,218,790	0.4%
MATERIAL FAILURE
BODY OF PIPE	18	1.6%	0	0	$11,737,321	1.2%
BUTT WELD	20	1.8%	0	0	$12,891,344	1.4%
COMPONENT	18	1.6%	0	1	$7,709,332	0.8%
FILLET WELD	5	0.4%	0	0	$2,206,220	0.2%
JOINT	11	1.0%	0	0	$2,627,127	0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	20	1.8%	0	2	$4,759,973	0.5%
PIPE SEAM WELD	14	1.2%	0	0	$4,022,269	0.4%
RUPTURED OR LEAKING SEAL/PUMP PACKING	4	0.3%	0	1	$11,455,730	1.2%
THREADS STRIPPED, BROKEN PIPE COUPLING	7	0.6%	0	3	$2,816,586	0.3%
VARIOUS	83	7.6%	1	12	$45,559,121	5.0%
Sub Total	200	18.3%	1	19	$105,785,028	11.6%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	8	0.7%	0	0	$7,106,855	0.7%
HEAVY RAINS/FLOODS	50	4.5%	0	0	$102,254,888	11.2%
HIGH WINDS	8	0.7%	0	0	$116,705,488	12.8%
LIGHTNING	3	0.2%	0	0	$966,664	0.1%
VARIOUS	50	4.5%	0	2	$53,928,533	5.9%
Sub Total	119	10.9%	0	2	$280,962,430	30.9%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	30	2.7%	0	5	$34,397,305	3.7%
FIRE/EXPLOSION AS PRIMARY CAUSE	5	0.4%	0	1	$4,673,532	0.5%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	4	0.3%	0	1	$3,697,854	0.4%
VANDALISM	1	0.0%	0	0	$146,416	0.0%
Sub Total	40	3.6%	0	7	$42,915,109	4.7%
ALL OTHER CAUSES
MISCELLANEOUS	39	3.5%	0	2	$18,777,549	2.0%
UNKNOWN	30	2.7%	0	4	$29,416,415	3.2%
VARIOUS	156	14.3%	9	88	$83,605,928	9.2%
Sub Total	225	20.6%	9	94	$131,799,892	14.5%
Totals	1,089	100.0%	59	207	$907,325,861	100.0%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	11	4	0	12	0	6	6
1989	13	0	0	15	0	7	5
1990	8	6	0	14	0	10	8
1991	6	2	0	12	0	7	2
1992	14	5	0	12	0	6	5
1993	19	6	0	6	0	10	9
1994	9	4	0	12	0	16	4
1995	9	6	0	8	0	2	7
1996	9	1	0	19	0	8	6
1997	6	4	0	11	0	9	3
1998	12	3	0	12	0	13	11
1999	10	3	0	11	0	8	6
2000	16	3	0	11	0	21	3
2001	14	3	0	15	0	10	8
2002	5	5	1	7	4	17	17
2003	8	2	6	11	7	16	19
2004	4	7	1	13	5	18	14
2005	11	41	3	10	9	14	21
2006	19	1	3	9	8	15	24
2007	12	2	2	10	4	33	13

National Gas Transmission Onshore: Significant Incident Details: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	52	4.7%	1	2	$137,462,244	15.1%
CORROSION, INTERNAL	19	1.7%	0	0	$21,572,386	2.3%
VARIOUS	89	8.1%	12	3	$33,098,137	3.6%
Sub Total	160	14.6%	13	5	$192,132,768	21.1%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	10	0.9%	0	2	$1,427,077	0.1%
THIRD PARTY EXCAVATION DAMAGE	55	5.0%	6	4	$14,082,583	1.5%
VARIOUS	136	12.4%	12	49	$67,184,805	7.4%
Sub Total	201	18.4%	18	55	$82,694,465	9.1%
HUMAN ERROR
INCORRECT OPERATION	16	1.4%	0	5	$3,531,692	0.3%
Sub Total	16	1.4%	0	5	$3,531,692	0.3%
MATERIAL FAILURE
BODY OF PIPE	17	1.5%	0	0	$11,629,318	1.2%
BUTT WELD	19	1.7%	0	0	$12,676,952	1.4%
COMPONENT	8	0.7%	0	1	$2,472,569	0.2%
FILLET WELD	5	0.4%	0	0	$2,206,220	0.2%
JOINT	8	0.7%	0	0	$1,867,438	0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	20	1.8%	0	2	$4,759,973	0.5%
PIPE SEAM WELD	14	1.2%	0	0	$4,022,269	0.4%
RUPTURED OR LEAKING SEAL/PUMP PACKING	4	0.3%	0	1	$11,455,730	1.2%
THREADS STRIPPED, BROKEN PIPE COUPLING	7	0.6%	0	3	$2,816,586	0.3%
VARIOUS	64	5.8%	1	12	$39,133,752	4.3%
Sub Total	166	15.2%	1	19	$93,040,811	10.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	7	0.6%	0	0	$6,545,620	0.7%
HEAVY RAINS/FLOODS	11	1.0%	0	0	$7,263,935	0.8%
HIGH WINDS	4	0.3%	0	0	$85,464,959	9.4%
LIGHTNING	3	0.2%	0	0	$966,664	0.1%
VARIOUS	40	3.6%	0	2	$37,936,502	4.1%
Sub Total	65	5.9%	0	2	$138,177,683	15.2%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	16	1.4%	0	5	$10,841,516	1.1%
FIRE/EXPLOSION AS PRIMARY CAUSE	5	0.4%	0	1	$4,673,532	0.5%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	3	0.2%	0	1	$1,979,419	0.2%
VANDALISM	1	0.0%	0	0	$146,416	0.0%
Sub Total	25	2.3%	0	7	$17,640,884	1.9%
ALL OTHER CAUSES
MISCELLANEOUS	31	2.8%	0	2	$12,325,527	1.3%
UNKNOWN	23	2.1%	0	4	$27,683,096	3.0%
VARIOUS	149	13.6%	7	86	$82,295,216	9.0%
Sub Total	203	18.6%	7	92	$122,303,840	13.4%
Totals	836	76.7%	39	185	$649,522,145	71.5%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	11	2	0	9	0	4	5
1989	12	0	0	11	0	3	3
1990	7	6	0	13	0	5	5
1991	6	2	0	12	0	5	2
1992	14	2	0	8	0	5	3
1993	17	6	0	4	0	10	6
1994	9	4	0	7	0	10	4
1995	7	4	0	5	0	1	5
1996	9	0	0	16	0	6	3
1997	6	3	0	8	0	6	3
1998	12	3	0	9	0	8	8
1999	10	3	0	10	0	5	6
2000	16	3	0	10	0	13	3
2001	13	2	0	14	0	8	8
2002	3	3	1	7	2	9	15
2003	8	1	6	10	6	11	19
2004	4	2	1	13	3	6	14
2005	9	11	2	10	4	10	17
2006	11	1	3	9	6	11	19
2007	10	2	2	10	1	20	10

National Gas Transmission Offshore: Significant Incident Details: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	1	0.0%	0	0	$182,947	0.0%
CORROSION, INTERNAL	47	4.3%	0	0	$20,928,039	2.3%
VARIOUS	44	4.0%	0	0	$9,645,077	1.0%
Sub Total	92	8.4%	0	0	$30,756,064	3.3%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE	1	0.0%	0	0	$1,561,047	0.1%
VARIOUS	34	3.1%	18	20	$34,500,264	3.8%
Sub Total	35	3.2%	18	20	$36,061,311	3.9%
HUMAN ERROR
INCORRECT OPERATION	1	0.0%	0	0	$687,098	0.0%
Sub Total	1	0.0%	0	0	$687,098	0.0%
MATERIAL FAILURE
BODY OF PIPE	1	0.0%	0	0	$108,003	0.0%
BUTT WELD	1	0.0%	0	0	$214,392	0.0%
COMPONENT	10	0.9%	0	0	$5,236,762	0.5%
JOINT	3	0.2%	0	0	$759,689	0.0%
VARIOUS	19	1.7%	0	0	$6,425,369	0.7%
Sub Total	34	3.1%	0	0	$12,744,216	1.4%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	1	0.0%	0	0	$561,234	0.0%
HEAVY RAINS/FLOODS	39	3.5%	0	0	$94,990,952	10.4%
HIGH WINDS	4	0.3%	0	0	$31,240,528	3.4%
VARIOUS	10	0.9%	0	0	$15,992,031	1.7%
Sub Total	54	4.9%	0	0	$142,784,747	15.7%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	14	1.2%	0	0	$23,555,789	2.6%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	1	0.0%	0	0	$1,718,434	0.1%
Sub Total	15	1.3%	0	0	$25,274,224	2.7%
ALL OTHER CAUSES
MISCELLANEOUS	8	0.7%	0	0	$6,452,021	0.7%
UNKNOWN	7	0.6%	0	0	$1,733,319	0.1%
VARIOUS	7	0.6%	2	2	$1,310,711	0.1%
Sub Total	22	2.0%	2	2	$9,496,052	1.0%
Totals	253	23.2%	20	22	$257,803,716	28.4%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	0	2	0	3	0	2	1
1989	1	0	0	4	0	4	2
1990	1	0	0	1	0	5	3
1991	0	0	0	0	0	2	0
1992	0	3	0	4	0	1	2
1993	2	0	0	2	0	0	3
1994	0	0	0	5	0	6	0
1995	2	2	0	3	0	1	2
1996	0	1	0	3	0	2	3
1997	0	1	0	3	0	3	0
1998	0	0	0	3	0	5	3
1999	0	0	0	1	0	3	0
2000	0	0	0	1	0	8	0
2001	1	1	0	1	0	2	0
2002	2	2	0	0	2	8	2
2003	0	1	0	1	1	5	0
2004	0	5	0	0	2	12	0
2005	2	30	1	0	5	4	4
2006	8	0	0	0	2	4	5
2007	2	0	0	0	3	13	3

National Gas Gathering: Significant Incident Details: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	4	3.4%	0	0	$971,270	0.3%
CORROSION, INTERNAL	32	27.8%	0	0	$17,667,231	6.3%
VARIOUS	23	20.0%	0	4	$7,812,676	2.8%
Sub Total	59	51.3%	0	4	$26,451,178	9.4%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE	1	0.8%	0	0	$109,352	0.0%
VARIOUS	12	10.4%	0	2	$11,910,530	4.2%
Sub Total	13	11.3%	0	2	$12,019,883	4.3%
HUMAN ERROR
INCORRECT OPERATION	2	1.7%	0	3	$21,870	0.0%
Sub Total	2	1.7%	0	3	$21,870	0.0%
MATERIAL FAILURE
COMPONENT	5	4.3%	0	1	$6,626,254	2.3%
JOINT	2	1.7%	0	0	$368,428	0.1%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	1	0.8%	0	0	$89,231	0.0%
THREADS STRIPPED, BROKEN PIPE COUPLING	2	1.7%	0	0	$1,680,509	0.6%
VARIOUS	7	6.0%	0	2	$2,407,779	0.8%
Sub Total	17	14.7%	0	3	$11,172,203	4.0%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	6	5.2%	0	0	$172,921,330	61.9%
HEAVY RAINS/FLOODS	3	2.6%	0	0	$838,241	0.3%
HIGH WINDS	3	2.6%	0	0	$45,097,342	16.1%
VARIOUS	1	0.8%	0	0	$417,330	0.1%
Sub Total	13	11.3%	0	0	$219,274,245	78.5%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	2	1.7%	0	1	$2,319,187	0.8%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	1	0.8%	0	0	$1,832,941	0.6%
Sub Total	3	2.6%	0	1	$4,152,128	1.4%
ALL OTHER CAUSES
MISCELLANEOUS	2	1.7%	0	0	$4,632,941	1.6%
UNKNOWN	1	0.8%	0	0	$306,368	0.1%
VARIOUS	5	4.3%	0	2	$1,262,676	0.4%
Sub Total	8	6.9%	0	2	$6,201,985	2.2%
Totals	115	100.0%	0	15	$279,293,495	100.0%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	1	0	0	0	0	2	0
1989	1	0	0	1	0	2	0
1990	0	0	0	0	0	0	1
1991	0	1	0	3	0	0	0
1992	1	0	0	3	0	0	2
1993	0	0	0	0	0	1	0
1994	0	0	0	1	0	4	0
1995	1	0	0	0	0	1	1
1997	0	0	0	1	0	1	1
1998	0	0	0	1	0	5	1
1999	1	0	0	0	0	1	0
2000	0	0	0	0	0	3	0
2001	0	0	0	2	0	3	1
2002	0	1	0	0	1	2	0
2003	0	0	0	0	0	2	1
2004	0	2	1	1	0	6	2
2005	0	7	1	0	1	8	1
2006	2	0	0	0	1	6	3
2007	1	0	0	0	0	8	1

National Gas Distribution: Significant Incident Details: 1988-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	12	0.6%	2	7	$1,427,283	0.1%
CORROSION, INTERNAL	1	0.0%	0	1	$437,511	0.0%
VARIOUS	58	3.1%	14	66	$9,199,086	0.9%
Sub Total	71	3.9%	16	74	$11,063,882	1.1%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	7	0.3%	1	6	$958,249	0.1%
THIRD PARTY EXCAVATION DAMAGE	98	5.3%	7	30	$32,482,479	3.2%
VARIOUS	563	30.9%	89	419	$133,225,136	13.3%
Sub Total	668	36.7%	97	455	$166,665,865	16.6%
HUMAN ERROR
INCORRECT OPERATION	18	0.9%	4	15	$3,495,937	0.3%
VARIOUS	74	4.0%	3	97	$3,234,327	0.3%
Sub Total	92	5.0%	7	112	$6,730,265	0.6%
MATERIAL FAILURE
BODY OF PIPE	5	0.2%	0	5	$1,475,396	0.1%
COMPONENT	4	0.2%	0	1	$956,628	0.1%
JOINT	7	0.3%	2	1	$2,271,429	0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	6	0.3%	0	0	$1,350,162	0.1%
RUPTURED OR LEAKING SEAL/PUMP PACKING	1	0.0%	0	0	$150,000	0.0%
THREADS STRIPPED, BROKEN PIPE COUPLING	1	0.0%	0	1	$3,344	0.0%
VARIOUS	93	5.1%	7	104	$10,585,214	1.0%
Sub Total	117	6.4%	9	112	$16,792,174	1.6%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	11	0.6%	0	5	$5,460,263	0.5%
HEAVY RAINS/FLOODS	17	0.9%	0	1	$512,161,499	51.2%
HIGH WINDS	6	0.3%	1	3	$22,177,104	2.2%
LIGHTNING	4	0.2%	4	1	$1,114,149	0.1%
TEMPERATURE	6	0.3%	3	1	$1,077,235	0.1%
VARIOUS	209	11.5%	24	106	$53,389,669	5.3%
Sub Total	253	13.9%	32	117	$595,379,922	59.5%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	57	3.1%	7	22	$13,305,128	1.3%
FIRE/EXPLOSION AS PRIMARY CAUSE	92	5.0%	3	10	$38,222,496	3.8%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	2	0.1%	0	0	$1,487,069	0.1%
VANDALISM	4	0.2%	3	6	$384,393	0.0%
Sub Total	155	8.5%	13	38	$53,399,088	5.3%
ALL OTHER CAUSES
MISCELLANEOUS	28	1.5%	3	20	$7,112,167	0.7%
UNKNOWN	55	3.0%	15	38	$13,327,494	1.3%
VARIOUS	379	20.8%	129	359	$129,389,741	12.9%
Sub Total	462	25.4%	147	417	$149,829,403	14.9%
Totals	1,818	100.0%	321	1,325	$999,860,602	100.0%

Source Data

Year	ALL OTHER CAUSES	NATURAL FORCE DAMAGE	HUMAN ERROR	EXCAVATION DAMAGE	OTHER OUTSIDE FORCE DAMAGE	CORROSION	MATERIAL FAILURE
1988	45	13	2	35	0	5	11
1989	31	16	6	35	0	5	4
1990	13	12	4	27	0	3	7
1991	18	12	4	35	0	6	5
1992	19	10	3	25	0	2	7
1993	20	13	7	36	0	5	7
1994	24	23	7	33	0	4	7
1995	12	10	6	33	0	3	4
1996	22	12	6	36	0	2	6
1997	26	10	3	24	0	3	3
1998	25	15	6	42	0	4	5
1999	19	9	5	40	0	7	8
2000	39	9	4	36	0	3	7
2001	9	8	3	42	0	4	3
2002	20	10	6	24	0	2	3
2003	27	19	2	52	1	0	3
2004	20	21	7	31	28	5	10
2005	14	12	6	23	39	2	8
2006	16	5	2	20	26	3	0
2007	24	6	0	30	25	1	6

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. Note: Significant Incidents include all Serious Incidents. Unless otherwise noted, any counts of Significant Incidents also include Serious Incidents.
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.
4. 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 Hazardous Liquid Filtered Incidents File - October 14, 2008
2. PHMSA Gas Transmission Filtered Incidents File - October 14, 2008
3. PHMSA Gas Distribution Filtered Incidents File - October 14, 2008

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