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This report is a sub-report of the Montana Significant Incident and Mileage Overview 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

Montana All Pipeline Systems: Significant Incident Details: 1998-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	1	6.2%	0	0	$0	0.0%
THIRD PARTY EXCAVATION DAMAGE	2	12.5%	0	2	$672,320	18.7%
VARIOUS	4	25.0%	0	1	$905,880	25.2%
Sub Total	7	43.7%	0	3	$1,578,200	43.9%
HUMAN ERROR
VARIOUS	1	6.2%	0	0	$879,525	24.5%
Sub Total	1	6.2%	0	0	$879,525	24.5%
MATERIAL FAILURE
RUPTURED OR LEAKING SEAL/PUMP PACKING	2	12.5%	0	0	$426,042	11.8%
VARIOUS	2	12.5%	0	0	$477,564	13.3%
Sub Total	4	25.0%	0	0	$903,606	25.1%
NATURAL FORCE DAMAGE
VARIOUS	1	6.2%	0	0	$72,725	2.0%
Sub Total	1	6.2%	0	0	$72,725	2.0%
ALL OTHER CAUSES
MISCELLANEOUS	1	6.2%	0	0	$19,200	0.5%
UNKNOWN	2	12.5%	0	1	$137,120	3.8%
Sub Total	3	18.7%	0	1	$156,320	4.3%
Totals	16	100.0%	0	4	$3,590,378	100.0%

• All Hazardous Liquid Systems
• Onshore Only
• Offshore Only

Montana Hazardous Liquid: Significant Incident Details: 1998-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	1	10.0%	0	0	$0	0.0%
VARIOUS	1	10.0%	0	0	$586,350	23.6%
Sub Total	2	20.0%	0	0	$586,350	23.6%
HUMAN ERROR
VARIOUS	1	10.0%	0	0	$879,525	35.4%
Sub Total	1	10.0%	0	0	$879,525	35.4%
MATERIAL FAILURE
RUPTURED OR LEAKING SEAL/PUMP PACKING	2	20.0%	0	0	$426,042	17.1%
VARIOUS	2	20.0%	0	0	$477,564	19.2%
Sub Total	4	40.0%	0	0	$903,606	36.4%
NATURAL FORCE DAMAGE
VARIOUS	1	10.0%	0	0	$72,725	2.9%
Sub Total	1	10.0%	0	0	$72,725	2.9%
ALL OTHER CAUSES
MISCELLANEOUS	1	10.0%	0	0	$19,200	0.7%
UNKNOWN	1	10.0%	0	0	$17,120	0.6%
Sub Total	2	20.0%	0	0	$36,320	1.4%
Totals	10	100.0%	0	0	$2,478,527	100.0%

Montana Hazardous Liquid Onshore: Significant Incident Details: 1998-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
EXCAVATION DAMAGE
OPERATOR EXCAVATION DAMAGE	1	10.0%	0	0	$0	0.0%
VARIOUS	1	10.0%	0	0	$586,350	23.6%
Sub Total	2	20.0%	0	0	$586,350	23.6%
HUMAN ERROR
VARIOUS	1	10.0%	0	0	$879,525	35.4%
Sub Total	1	10.0%	0	0	$879,525	35.4%
MATERIAL FAILURE
RUPTURED OR LEAKING SEAL/PUMP PACKING	2	20.0%	0	0	$426,042	17.1%
VARIOUS	2	20.0%	0	0	$477,564	19.2%
Sub Total	4	40.0%	0	0	$903,606	36.4%
NATURAL FORCE DAMAGE
VARIOUS	1	10.0%	0	0	$72,725	2.9%
Sub Total	1	10.0%	0	0	$72,725	2.9%
ALL OTHER CAUSES
MISCELLANEOUS	1	10.0%	0	0	$19,200	0.7%
UNKNOWN	1	10.0%	0	0	$17,120	0.6%
Sub Total	2	20.0%	0	0	$36,320	1.4%
Totals	10	100.0%	0	0	$2,478,527	100.0%

No Data Available

• All Gas Transmission Systems
• Onshore Only
• Offshore Only

Montana Gas Transmission: Significant Incident Details: 1998-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
EXCAVATION DAMAGE
VARIOUS	2	100.0%	0	0	$308,271	100.0%
Sub Total	2	100.0%	0	0	$308,271	100.0%
Totals	2	100.0%	0	0	$308,271	100.0%

Montana Gas Transmission Onshore: Significant Incident Details: 1998-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
EXCAVATION DAMAGE
VARIOUS	2	100.0%	0	0	$308,271	100.0%
Sub Total	2	100.0%	0	0	$308,271	100.0%
Totals	2	100.0%	0	0	$308,271	100.0%

No Data Available

No Data Available

Montana Gas Distribution: Significant Incident Details: 1998-2008 YTD

Reported Cause of Incident	Number	%	Fatalities	Injuries	Property Damage (B) (C)	% of Property Damage
EXCAVATION DAMAGE
THIRD PARTY EXCAVATION DAMAGE	2	50.0%	0	2	$672,320	83.6%
VARIOUS	1	25.0%	0	1	$11,259	1.4%
Sub Total	3	75.0%	0	3	$683,579	85.0%
ALL OTHER CAUSES
UNKNOWN	1	25.0%	0	1	$120,000	14.9%
Sub Total	1	25.0%	0	1	$120,000	14.9%
Totals	4	100.0%	0	4	$803,579	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. 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.

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.