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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: 2004-2008

Reported Cause of Incident (C)	Number (B)	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	142	9.8%	3	24	$204,015,217	8.6%
CORROSION, INTERNAL	142	9.8%	0	1	$54,609,314	2.3%
Sub Total	284	19.7%	3	25	$258,624,531	10.9%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	40	2.7%	1	10	$11,934,049	0.5%
THIRD PARTY EXCAVATION DAMAGE	205	14.2%	19	43	$78,076,973	3.3%
VARIOUS	8	0.5%	1	2	$2,546,396	0.1%
Sub Total	253	17.5%	21	55	$92,557,420	3.9%
INCORRECT OPERATION
INCORRECT OPERATION	77	5.3%	6	25	$18,811,199	0.7%
Sub Total	77	5.3%	6	25	$18,811,199	0.7%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE	39	2.7%	0	6	$22,429,852	0.9%
BUTT WELD	29	2.0%	0	0	$15,187,415	0.6%
COMPONENT	54	3.7%	0	4	$45,852,581	1.9%
FILLET WELD	12	0.8%	0	0	$20,462,225	0.8%
JOINT	26	1.8%	2	1	$7,146,566	0.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	48	3.3%	0	0	$8,606,308	0.3%
PIPE SEAM WELD	33	2.2%	0	0	$44,242,426	1.8%
RUPTURED OR LEAKING SEAL/PUMP PACKING	37	2.5%	0	1	$19,750,069	0.8%
THREADS STRIPPED, BROKEN PIPE COUPLING	25	1.7%	0	2	$3,041,721	0.1%
VARIOUS	3	0.2%	0	0	$948,368	0.0%
Sub Total	306	21.2%	2	14	$187,667,535	7.9%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	34	2.3%	0	5	$252,459,817	10.6%
HEAVY RAINS/FLOODS	82	5.7%	0	1	$790,929,684	33.3%
HIGH WINDS	28	1.9%	1	3	$420,098,415	17.7%
LIGHTNING	19	1.3%	4	1	$22,593,226	0.9%
TEMPERATURE	12	0.8%	3	1	$7,233,592	0.3%
VARIOUS	8	0.5%	0	4	$2,291,984	0.1%
Sub Total	183	12.7%	8	15	$1,495,606,721	63.1%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	94	6.5%	8	24	$88,954,962	3.7%
FIRE/EXPLOSION AS PRIMARY CAUSE	7	0.4%	0	1	$1,612,957	0.0%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	13	0.9%	0	1	$24,405,429	1.0%
VANDALISM	9	0.6%	3	7	$1,491,712	0.0%
Sub Total	123	8.5%	11	33	$116,465,062	4.9%
ALL OTHER CAUSES
MISCELLANEOUS	107	7.4%	3	25	$58,666,671	2.4%
UNKNOWN	95	6.6%	20	57	$137,831,324	5.8%
VARIOUS	11	0.7%	4	2	$2,984,108	0.1%
Sub Total	213	14.8%	27	84	$199,482,104	8.4%
Totals	1,439	100.0%	78	251	$2,369,214,574	100.0%

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• All Hazardous Liquid Systems
• Onshore Only
• Offshore Only

National Hazardous Liquid: Significant Incident Details: 2004-2008

Reported Cause of Incident (C)	Number	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	80	13.5%	0	15	$65,930,582	8.8%
CORROSION, INTERNAL	68	11.5%	0	0	$13,813,413	1.8%
Sub Total	148	25.0%	0	15	$79,743,996	10.6%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	22	3.7%	0	1	$9,384,074	1.2%
THIRD PARTY EXCAVATION DAMAGE	60	10.1%	5	6	$29,442,997	3.9%
Sub Total	82	13.9%	5	7	$38,827,072	5.2%
INCORRECT OPERATION
INCORRECT OPERATION	43	7.2%	4	0	$13,755,809	1.8%
Sub Total	43	7.2%	4	0	$13,755,809	1.8%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE	20	3.3%	0	0	$16,715,097	2.2%
BUTT WELD	10	1.6%	0	0	$1,327,265	0.1%
COMPONENT	30	5.0%	0	1	$21,033,596	2.8%
FILLET WELD	10	1.6%	0	0	$19,935,010	2.6%
JOINT	9	1.5%	0	0	$2,428,208	0.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	22	3.7%	0	0	$1,268,058	0.1%
PIPE SEAM WELD	28	4.7%	0	0	$42,867,230	5.7%
RUPTURED OR LEAKING SEAL/PUMP PACKING	32	5.4%	0	0	$7,360,682	0.9%
THREADS STRIPPED, BROKEN PIPE COUPLING	19	3.2%	0	0	$2,384,863	0.3%
Sub Total	180	30.5%	0	1	$115,320,014	15.4%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	9	1.5%	0	0	$61,557,630	8.2%
HEAVY RAINS/FLOODS	10	1.6%	0	0	$54,785,373	7.3%
HIGH WINDS	12	2.0%	0	0	$242,499,034	32.5%
LIGHTNING	13	2.2%	0	0	$20,840,066	2.7%
TEMPERATURE	7	1.1%	0	0	$6,338,958	0.8%
Sub Total	51	8.6%	0	0	$386,021,064	51.7%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	11	1.8%	1	0	$11,300,156	1.5%
FIRE/EXPLOSION AS PRIMARY CAUSE	3	0.5%	0	0	$164,176	0.0%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	6	1.0%	0	0	$17,132,226	2.3%
VANDALISM	4	0.6%	0	1	$998,264	0.1%
Sub Total	24	4.0%	1	1	$29,594,824	3.9%
ALL OTHER CAUSES
MISCELLANEOUS	40	6.7%	0	0	$11,976,516	1.6%
UNKNOWN	18	3.0%	3	8	$70,697,653	9.4%
VARIOUS	4	0.6%	0	0	$220,779	0.0%
Sub Total	62	10.5%	3	8	$82,894,949	11.1%
Totals	590	100.0%	13	32	$746,157,729	100.0%

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National Hazardous Liquid Onshore: Significant Incident Details: 2004-2008

Reported Cause of Incident (C)	Number	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	79	13.3%	0	15	$65,809,060	8.8%
CORROSION, INTERNAL	68	11.5%	0	0	$13,813,413	1.8%
Sub Total	147	24.9%	0	15	$79,622,473	10.6%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	22	3.7%	0	1	$9,384,074	1.2%
THIRD PARTY EXCAVATION DAMAGE	60	10.1%	5	6	$29,442,997	3.9%
Sub Total	82	13.9%	5	7	$38,827,072	5.2%
INCORRECT OPERATION
INCORRECT OPERATION	43	7.2%	4	0	$13,755,809	1.8%
Sub Total	43	7.2%	4	0	$13,755,809	1.8%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE	20	3.3%	0	0	$16,715,097	2.2%
BUTT WELD	10	1.6%	0	0	$1,327,265	0.1%
COMPONENT	28	4.7%	0	1	$7,387,510	0.9%
FILLET WELD	10	1.6%	0	0	$19,935,010	2.6%
JOINT	9	1.5%	0	0	$2,428,208	0.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	22	3.7%	0	0	$1,268,058	0.1%
PIPE SEAM WELD	28	4.7%	0	0	$42,867,230	5.7%
RUPTURED OR LEAKING SEAL/PUMP PACKING	31	5.2%	0	0	$6,788,254	0.9%
THREADS STRIPPED, BROKEN PIPE COUPLING	19	3.2%	0	0	$2,384,863	0.3%
Sub Total	177	30.0%	0	1	$101,101,499	13.5%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	7	1.1%	0	0	$27,298,917	3.6%
HEAVY RAINS/FLOODS	8	1.3%	0	0	$43,911,935	5.8%
HIGH WINDS	2	0.3%	0	0	$184,876,397	24.7%
LIGHTNING	13	2.2%	0	0	$20,840,066	2.7%
TEMPERATURE	7	1.1%	0	0	$6,338,958	0.8%
Sub Total	37	6.2%	0	0	$283,266,275	37.9%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	8	1.3%	1	0	$2,183,420	0.2%
FIRE/EXPLOSION AS PRIMARY CAUSE	3	0.5%	0	0	$164,176	0.0%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	6	1.0%	0	0	$17,132,226	2.3%
VANDALISM	4	0.6%	0	1	$998,264	0.1%
Sub Total	21	3.5%	1	1	$20,478,087	2.7%
ALL OTHER CAUSES
MISCELLANEOUS	38	6.4%	0	0	$11,100,054	1.4%
UNKNOWN	15	2.5%	3	8	$49,917,787	6.6%
VARIOUS	4	0.6%	0	0	$220,779	0.0%
Sub Total	57	9.6%	3	8	$61,238,620	8.2%
Totals	564	95.5%	13	32	$598,289,838	80.1%

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National Hazardous Liquid Offshore: Significant Incident Details: 2004-2008

Reported Cause of Incident (C)	Number	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	1	0.1%	0	0	$121,522	0.0%
Sub Total	1	0.1%	0	0	$121,522	0.0%
MAT'L/WELD/EQUIP FAILURE
COMPONENT	2	0.3%	0	0	$13,646,086	1.8%
RUPTURED OR LEAKING SEAL/PUMP PACKING	1	0.1%	0	0	$572,428	0.0%
Sub Total	3	0.5%	0	0	$14,218,514	1.9%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	2	0.3%	0	0	$34,258,712	4.5%
HEAVY RAINS/FLOODS	2	0.3%	0	0	$10,873,438	1.4%
HIGH WINDS	10	1.6%	0	0	$57,622,637	7.7%
Sub Total	14	2.3%	0	0	$102,754,788	13.7%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	3	0.5%	0	0	$9,116,736	1.2%
Sub Total	3	0.5%	0	0	$9,116,736	1.2%
ALL OTHER CAUSES
MISCELLANEOUS	2	0.3%	0	0	$876,462	0.1%
UNKNOWN	3	0.5%	0	0	$20,779,866	2.7%
Sub Total	5	0.8%	0	0	$21,656,328	2.9%
Totals	26	4.4%	0	0	$147,867,890	19.8%

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• All Gas Transmission Systems
• Onshore Only
• Offshore Only

National Gas Transmission: Significant Incident Details: 2004-2008

Reported Cause of Incident (C)	Number	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	45	11.4%	1	2	$134,704,834	21.2%
CORROSION, INTERNAL	45	11.4%	0	0	$23,498,493	3.7%
Sub Total	90	22.9%	1	2	$158,203,328	24.9%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	11	2.8%	0	3	$1,563,345	0.2%
THIRD PARTY EXCAVATION DAMAGE	39	9.9%	4	1	$10,583,684	1.6%
Sub Total	50	12.7%	4	4	$12,147,029	1.9%
INCORRECT OPERATION
INCORRECT OPERATION	12	3.0%	0	5	$1,415,560	0.2%
Sub Total	12	3.0%	0	5	$1,415,560	0.2%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE	13	3.3%	0	0	$4,132,800	0.6%
BUTT WELD	18	4.5%	0	0	$13,504,650	2.1%
COMPONENT	15	3.8%	0	1	$6,185,566	0.9%
FILLET WELD	2	0.5%	0	0	$527,214	0.0%
JOINT	8	2.0%	0	0	$1,975,511	0.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	19	4.8%	0	0	$5,863,161	0.9%
PIPE SEAM WELD	5	1.2%	0	0	$1,375,196	0.2%
RUPTURED OR LEAKING SEAL/PUMP PACKING	4	1.0%	0	1	$12,239,387	1.9%
THREADS STRIPPED, BROKEN PIPE COUPLING	4	1.0%	0	1	$494,169	0.0%
Sub Total	88	22.4%	0	3	$46,297,657	7.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	8	2.0%	0	0	$5,636,565	0.8%
HEAVY RAINS/FLOODS	53	13.5%	0	0	$203,474,364	32.0%
HIGH WINDS	7	1.7%	0	0	$109,931,869	17.3%
LIGHTNING	2	0.5%	0	0	$616,423	0.1%
Sub Total	70	17.8%	0	0	$319,659,222	50.3%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	24	6.1%	0	3	$33,184,359	5.2%
FIRE/EXPLOSION AS PRIMARY CAUSE	4	1.0%	0	1	$1,448,781	0.2%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	3	0.7%	0	1	$3,608,670	0.5%
Sub Total	31	7.9%	0	5	$38,241,811	6.0%
ALL OTHER CAUSES
MISCELLANEOUS	35	8.9%	0	3	$33,463,643	5.2%
UNKNOWN	16	4.0%	0	1	$26,034,086	4.1%
Sub Total	51	13.0%	0	4	$59,497,729	9.3%
Totals	392	100.0%	5	23	$635,462,339	100.0%

Export Table

National Gas Transmission Onshore: Significant Incident Details: 2004-2008

Reported Cause of Incident (C)	Number	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	44	11.2%	1	2	$134,510,001	21.1%
CORROSION, INTERNAL	15	3.8%	0	0	$8,070,392	1.2%
Sub Total	59	15.0%	1	2	$142,580,393	22.4%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	11	2.8%	0	3	$1,563,345	0.2%
THIRD PARTY EXCAVATION DAMAGE	39	9.9%	4	1	$10,583,684	1.6%
Sub Total	50	12.7%	4	4	$12,147,029	1.9%
INCORRECT OPERATION
INCORRECT OPERATION	11	2.8%	0	5	$680,161	0.1%
Sub Total	11	2.8%	0	5	$680,161	0.1%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE	12	3.0%	0	0	$4,020,624	0.6%
BUTT WELD	15	3.8%	0	0	$12,501,941	1.9%
COMPONENT	6	1.5%	0	1	$1,313,511	0.2%
FILLET WELD	2	0.5%	0	0	$527,214	0.0%
JOINT	6	1.5%	0	0	$1,322,838	0.2%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	19	4.8%	0	0	$5,863,161	0.9%
PIPE SEAM WELD	5	1.2%	0	0	$1,375,196	0.2%
RUPTURED OR LEAKING SEAL/PUMP PACKING	4	1.0%	0	1	$12,239,387	1.9%
THREADS STRIPPED, BROKEN PIPE COUPLING	3	0.7%	0	1	$228,809	0.0%
Sub Total	72	18.3%	0	3	$39,392,686	6.2%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	6	1.5%	0	0	$2,834,049	0.4%
HEAVY RAINS/FLOODS	10	2.5%	0	0	$77,956,143	12.2%
HIGH WINDS	4	1.0%	0	0	$78,987,415	12.4%
LIGHTNING	2	0.5%	0	0	$616,423	0.1%
Sub Total	22	5.6%	0	0	$160,394,031	25.2%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	13	3.3%	0	3	$9,939,735	1.5%
FIRE/EXPLOSION AS PRIMARY CAUSE	4	1.0%	0	1	$1,448,781	0.2%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	2	0.5%	0	1	$1,820,158	0.2%
Sub Total	19	4.8%	0	5	$13,208,674	2.0%
ALL OTHER CAUSES
MISCELLANEOUS	26	6.6%	0	3	$12,316,095	1.9%
UNKNOWN	9	2.3%	0	1	$24,047,143	3.7%
Sub Total	35	8.9%	0	4	$36,363,239	5.7%
Totals	268	68.3%	5	23	$404,766,216	63.7%

Export Table

National Gas Transmission Offshore: Significant Incident Details: 2004-2008

Reported Cause of Incident (C)	Number	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	1	0.2%	0	0	$194,833	0.0%
CORROSION, INTERNAL	30	7.6%	0	0	$15,428,101	2.4%
Sub Total	31	7.9%	0	0	$15,622,934	2.4%
INCORRECT OPERATION
INCORRECT OPERATION	1	0.2%	0	0	$735,398	0.1%
Sub Total	1	0.2%	0	0	$735,398	0.1%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE	1	0.2%	0	0	$112,175	0.0%
BUTT WELD	3	0.7%	0	0	$1,002,708	0.1%
COMPONENT	9	2.3%	0	0	$4,872,055	0.7%
JOINT	2	0.5%	0	0	$652,673	0.1%
THREADS STRIPPED, BROKEN PIPE COUPLING	1	0.2%	0	0	$265,359	0.0%
Sub Total	16	4.0%	0	0	$6,904,971	1.0%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	2	0.5%	0	0	$2,802,516	0.4%
HEAVY RAINS/FLOODS	43	10.9%	0	0	$125,518,220	19.7%
HIGH WINDS	3	0.7%	0	0	$30,944,453	4.8%
Sub Total	48	12.2%	0	0	$159,265,190	25.0%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	11	2.8%	0	0	$23,244,623	3.6%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	1	0.2%	0	0	$1,788,512	0.2%
Sub Total	12	3.0%	0	0	$25,033,136	3.9%
ALL OTHER CAUSES
MISCELLANEOUS	9	2.3%	0	0	$21,147,548	3.3%
UNKNOWN	7	1.7%	0	0	$1,986,942	0.3%
Sub Total	16	4.0%	0	0	$23,134,490	3.6%
Totals	124	31.6%	0	0	$230,696,122	36.3%

Export Table

National Gas Gathering: Significant Incident Details: 2004-2008

Reported Cause of Incident (C)	Number	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	5	7.5%	0	0	$1,894,202	0.5%
CORROSION, INTERNAL	28	42.4%	0	0	$16,842,991	5.1%
Sub Total	33	50.0%	0	0	$18,737,193	5.7%
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE	1	1.5%	0	0	$113,577	0.0%
Sub Total	1	1.5%	0	0	$113,577	0.0%
INCORRECT OPERATION
INCORRECT OPERATION	2	3.0%	0	3	$22,715	0.0%
Sub Total	2	3.0%	0	3	$22,715	0.0%
MAT'L/WELD/EQUIP FAILURE
COMPONENT	5	7.5%	0	1	$17,639,812	5.3%
JOINT	2	3.0%	0	0	$383,088	0.1%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	1	1.5%	0	0	$92,678	0.0%
THREADS STRIPPED, BROKEN PIPE COUPLING	1	1.5%	0	0	$159,215	0.0%
Sub Total	9	13.6%	0	1	$18,274,796	5.5%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	6	9.0%	0	0	$179,634,128	54.7%
HEAVY RAINS/FLOODS	2	3.0%	0	0	$532,498	0.1%
HIGH WINDS	3	4.5%	0	0	$45,423,739	13.8%
Sub Total	11	16.6%	0	0	$225,590,366	68.7%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	2	3.0%	0	0	$30,561,907	9.3%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	1	1.5%	0	0	$1,915,017	0.5%
Sub Total	3	4.5%	0	0	$32,476,924	9.9%
ALL OTHER CAUSES
MISCELLANEOUS	4	6.0%	0	0	$6,309,585	1.9%
UNKNOWN	3	4.5%	0	0	$26,625,957	8.1%
Sub Total	7	10.6%	0	0	$32,935,542	10.0%
Totals	66	100.0%	0	4	$328,151,115	100.0%

Export Table

National Gas Distribution: Significant Incident Details: 2004-2008

Reported Cause of Incident (C)	Number (B)	%	Fatalities	Injuries	Property Damage (D) (E)	% of Property Damage
CORROSION
CORROSION, EXTERNAL	12	3.0%	2	7	$1,485,597	0.2%
CORROSION, INTERNAL	1	0.2%	0	1	$454,416	0.0%
Sub Total	13	3.3%	2	8	$1,940,013	0.2%
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	7	1.7%	1	6	$986,630	0.1%
THIRD PARTY EXCAVATION DAMAGE	105	26.8%	10	36	$37,936,714	5.7%
VARIOUS	8	2.0%	1	2	$2,546,396	0.3%
Sub Total	120	30.6%	12	44	$41,469,741	6.2%
INCORRECT OPERATION
INCORRECT OPERATION	20	5.1%	2	17	$3,617,113	0.5%
Sub Total	20	5.1%	2	17	$3,617,113	0.5%
MAT'L/WELD/EQUIP FAILURE
BODY OF PIPE	6	1.5%	0	6	$1,581,954	0.2%
BUTT WELD	1	0.2%	0	0	$355,500	0.0%
COMPONENT	4	1.0%	0	1	$993,604	0.1%
JOINT	7	1.7%	2	1	$2,359,757	0.3%
MALFUNCTION OF CONTROL/RELIEF EQUIPMENT	6	1.5%	0	0	$1,382,409	0.2%
RUPTURED OR LEAKING SEAL/PUMP PACKING	1	0.2%	0	0	$150,000	0.0%
THREADS STRIPPED, BROKEN PIPE COUPLING	1	0.2%	0	1	$3,473	0.0%
VARIOUS	3	0.7%	0	0	$948,368	0.1%
Sub Total	29	7.4%	2	9	$7,775,066	1.1%
NATURAL FORCE DAMAGE
EARTH MOVEMENT	11	2.8%	0	5	$5,631,492	0.8%
HEAVY RAINS/FLOODS	17	4.3%	0	1	$532,137,448	80.6%
HIGH WINDS	6	1.5%	1	3	$22,243,772	3.3%
LIGHTNING	4	1.0%	4	1	$1,136,736	0.1%
TEMPERATURE	5	1.2%	3	1	$894,634	0.1%
VARIOUS	8	2.0%	0	4	$2,291,984	0.3%
Sub Total	51	13.0%	8	15	$564,336,067	85.5%
OTHER OUTSIDE FORCE DAMAGE
CAR, TRUCK OR OTHER VEHICLE NOT RELATED TO...	57	14.5%	7	21	$13,908,539	2.1%
RUPTURE OF PREVIOUSLY DAMAGED PIPE	3	0.7%	0	0	$1,749,515	0.2%
VANDALISM	5	1.2%	3	6	$493,447	0.0%
Sub Total	65	16.6%	10	27	$16,151,502	2.4%
ALL OTHER CAUSES
MISCELLANEOUS	28	7.1%	3	22	$6,916,926	1.0%
UNKNOWN	58	14.8%	17	48	$14,473,627	2.1%
VARIOUS	7	1.7%	4	2	$2,763,328	0.4%
Sub Total	93	23.7%	24	72	$24,153,882	3.6%
Totals	391	100.0%	60	192	$659,443,389	100.0%

Export Table

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. 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.
3. 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.
4. The costs for incidents prior to 2008 are presented in 2008 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. All costs prior to 2008 are expressed in 2008 dollars.

Sources

1. PHMSA Hazardous Liquid Flagged Incidents File - October 14, 2009
2. PHMSA Gas Transmission Flagged Incidents File - October 14, 2009
3. PHMSA Gas Distribution Flagged Incidents File - October 14, 2009

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