Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2011-07-01 — TX
Operator
Exxonmobil Pipeline Co
Cause
Natural Force Damage
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$5,000,000
Incident datetime
2011-07-01 23:45
Report number
Location
TX
Narrative
1. In reference to part a9 and d5b, estimate of the release was changed to 1509 bbls. On 1-19-12 2. In reference to section b12, empco was unable to determine the water depth at the location of the accident. The closest gauge downstream measured 13.91 ft. 3. In addition to the fbe coating the pipe has a 1 inch concrete "skin" for abrasion r�sistance in reference section 3h. 4. In reference to a4, a14a and a18a, the system pressure dropped at approximately 22:40. The silvertip station pumps were shut down by the controller by approximately 22:48. Positive confirmation of the accident occurred at approximately 23:45 when empco was notified by laurel emergency responders. 5. Supplemental report created on 1-27-12 to change release amount from 1000 to 1509 bbls and provide additional cost information. 6. Emergency response and environmental remediation cost are combined in section d. (8d & 8e) 7. Section d. 8f estimated other cost 22,350,000 includes the hdd's at rock creek and clarks fork, pipe extraction, and other restart costs. 8. Damaged segments of the ruptured pipeline were removed and shipped to a third party metallurgy laboratory for analysis. The metallurgy laboratory report was sent to PHMSA on 8-6-12. 9. Part g-apparent cause narrative on july 1, 2011, the silvertip pipeline suffered a loss of containment at a crossing of the yellowstone river in laurel, mt during flood and high water conditions that persisted for more than a month. Kiefner & associates, inc. Conducted a metallurgical examination of the failed pipe and concluded that the pipeline failed at a girth weld as a result of the effects of external loading that occurred due to exposure to flood conditions. 10. Supplemental report created per federal register change to collect pipe data pipe adjacent to girth weld in part c 3 a-h.
Detailed record list
Report Received Date
2011-07-29 00:00:00
Iyear
2011
Report Number
20110262
Supplemental Number
20985
Report Type
Supplemental Final
Operator Id
4906
Name
Exxonmobil Pipeline Co
Operator Street Address
22777 Springwoods Village Parkway E2.2b-Emp
Operator City Name
Spring
Operator State Abbreviation
TX
Operator Postal Code
77389
Local Datetime
2011-07-01 22:40:00
Location Latitude
45.655486
Location Longitude
-108.75724
Commodity Released Type
Crude Oil
Unintentional Release Bbls
1509
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Notification From Emergency Responder
Incident Identified Datetime
2011-07-01 23:45:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2011-07-01 22:48:00
Restart Datetime
2011-09-24 07:00:00
On Site Datetime
2011-07-02 00:10:00
Nrc Rpt Datetime
2011-07-02 00:19:00
Nrc Rpt Num
981503
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Automatic
Downstream Valve Type Ind
Check Valve
Num Pub Evacuated
40
Pipe Fac Name
Silvertip To Billings 12 Inch Crude Oil Pipeline
Segment Name
Edgar To Laurel
Onshore State Abbreviation
Mt
Onshore Postal Code
59044
Onshore City Name
Laurel
Onshore County Name
Yellowstone
Designated Location
Milepost/valve Station
Designated Name
21.1
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Other
Incident Area Details
Under Water (River Bottom)
Depth Of Cover
1
Crossing
Yes
Water Crossing Ind
Yes
Water Type
Uncased
Water Name
Yellowstone River
Water Depth
13
Water Subtype
Below Water, Pipe Buried Below Bottom (Not In Bored/drilled Crossing)
Pipe Facility Type
Interstate
Item Involved
Weld, Including Heat-Affected Zone
Pipe Diameter
12.75
Pipe Wall Thickness
0.5
Pipe Smys
35000
Pipe Specification
Api 5l Grade B
Pipe Seam Type
Seamless
Pipe Manufacturer
U. S. Steel
Pipe Coating Type
Fusion Bonded Epoxy(Fbe)
Weld Subtype
Pipe Girth Weld
Installation Year
1991
Manufactured Year
1990
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Guillotine Break Of The Pipe
Wildlife Impact Ind
Yes
Fish Aquatic Impact Ind
Yes
Birds Impact Ind
Yes
Terrestrial Impact Ind
Yes
Soil Contamination
Yes
Long Term Assessment
Yes
Remediation Ind
Yes
Surface Water Remed Ind
Yes
Soil Remed Ind
Yes
Vegetation Remed Ind
Yes
Wildlife Remed Ind
Yes
Water Contam Ind
Yes
Surface Contam Ind
Yes
Amount Released
1509
Rel Water Name
Yellowstone River
Could Be Hca
Yes
Commodity Reached Hca
Yes
High Pop Ind
Yes
High Pop Yes No
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Usa Drinking Ind
Yes
Usa Drinking Yes No
Yes
Est Cost Oper Paid
7500000
Est Cost Gas Released
150000
Est Cost Prop Damage
5000000
Est Cost Emergency
100000000
Est Cost Environmental
0
Est Cost Other
22350000
Est Cost Other Details
Environmental & Emergency Response Combined Other Cost: Explained In Section H
Prpty
135000000
Accident Psig
525
Mop Psig
960
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
1709
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
Yes
Cpm Conf Ind
Yes
Investigation Status
No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate)
Investigation Status Details
Controller recognized the incident and took steps necessary to mitigate the situation.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Natural Force Damage
Cause Details
Heavy Rains/floods
Natural Force Type
Heavy Rains/floods
Heavy Rains Subtype
Washouts/scouring
Nf Extreme Weather Ind
Yes
Nf Other Ind
Yes
Nf Extreme Weather Details
Heavy Rains And Flood.
Preparer Name
M****** B*****
Preparer Title
Pipeline Safety Advisor
Preparer Email
M***************@e*********.com
Preparer Telephone
832-624-7879
Preparer Fax
262-313-1317
Prepared Date
2015-12-15 00:00:00
Authorizer Name
M*** B*******
Authorizer Telephone
587-476-4074
Authorizer Title
Sshe Manager
Authorizer Email
M**********************@e***.ca
Narrative
1. In reference to part a9 and d5b, estimate of the release was changed to 1509 bbls. On 1-19-12 2. In reference to section b12, empco was unable to determine the water depth at the location of the accident. The closest gauge downstream measured 13.91 ft. 3. In addition to the fbe coating the pipe has a 1 inch concrete "skin" for abrasion r�sistance in reference section 3h. 4. In reference to a4, a14a and a18a, the system pressure dropped at approximately 22:40. The silvertip station pumps were shut down by the controller by approximately 22:48. Positive confirmation of the accident occurred at approximately 23:45 when empco was notified by laurel emergency responders. 5. Supplemental report created on 1-27-12 to change release amount from 1000 to 1509 bbls and provide additional cost information. 6. Emergency response and environmental remediation cost are combined in section d. (8d & 8e) 7. Section d. 8f estimated other cost 22,350,000 includes the hdd's at rock creek and clarks fork, pipe extraction, and other restart costs. 8. Damaged segments of the ruptured pipeline were removed and shipped to a third party metallurgy laboratory for analysis. The metallurgy laboratory report was sent to PHMSA on 8-6-12. 9. Part g-apparent cause narrative on july 1, 2011, the silvertip pipeline suffered a loss of containment at a crossing of the yellowstone river in laurel, mt during flood and high water conditions that persisted for more than a month. Kiefner & associates, inc. Conducted a metallurgical examination of the failed pipe and concluded that the pipeline failed at a girth weld as a result of the effects of external loading that occurred due to exposure to flood conditions. 10. Supplemental report created per federal register change to collect pipe data pipe adjacent to girth weld in part c 3 a-h.
| Report Received Date | 2011-07-29 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110262 |
| Supplemental Number | 20985 |
| Report Type | Supplemental Final |
| Operator Id | 4906 PHMSA Enforcement |
| Name | Exxonmobil Pipeline Co |
| Operator Street Address | 22777 Springwoods Village Parkway E2.2b-Emp |
| Operator City Name | Spring |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77389 |
| Local Datetime | 2011-07-01 22:40:00 |
| Location Latitude | 45.655486 Google Maps OpenStreetMap |
| Location Longitude | -108.75724 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 1509 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Notification From Emergency Responder |
| Incident Identified Datetime | 2011-07-01 23:45:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2011-07-01 22:48:00 |
| Restart Datetime | 2011-09-24 07:00:00 |
| On Site Datetime | 2011-07-02 00:10:00 |
| Nrc Rpt Datetime | 2011-07-02 00:19:00 |
| Nrc Rpt Num | 981503 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Automatic |
| Downstream Valve Type Ind | Check Valve |
| Num Pub Evacuated | 40 |
| Pipe Fac Name | Silvertip To Billings 12 Inch Crude Oil Pipeline |
| Segment Name | Edgar To Laurel |
| Onshore State Abbreviation | Mt |
| Onshore Postal Code | 59044 |
| Onshore City Name | Laurel |
| Onshore County Name | Yellowstone |
| Designated Location | Milepost/valve Station |
| Designated Name | 21.1 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Other |
| Incident Area Details | Under Water (River Bottom) |
| Depth Of Cover | 1 |
| Crossing | Yes |
| Water Crossing Ind | Yes |
| Water Type | Uncased |
| Water Name | Yellowstone River |
| Water Depth | 13 |
| Water Subtype | Below Water, Pipe Buried Below Bottom (Not In Bored/drilled Crossing) |
| Pipe Facility Type | Interstate |
| Item Involved | Weld, Including Heat-Affected Zone |
| Pipe Diameter | 12.75 |
| Pipe Wall Thickness | 0.5 |
| Pipe Smys | 35000 |
| Pipe Specification | Api 5l Grade B |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | U. S. Steel |
| Pipe Coating Type | Fusion Bonded Epoxy(Fbe) |
| Weld Subtype | Pipe Girth Weld |
| Installation Year | 1991 |
| Manufactured Year | 1990 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Guillotine Break Of The Pipe |
| Wildlife Impact Ind | Yes |
| Fish Aquatic Impact Ind | Yes |
| Birds Impact Ind | Yes |
| Terrestrial Impact Ind | Yes |
| Soil Contamination | Yes |
| Long Term Assessment | Yes |
| Remediation Ind | Yes |
| Surface Water Remed Ind | Yes |
| Soil Remed Ind | Yes |
| Vegetation Remed Ind | Yes |
| Wildlife Remed Ind | Yes |
| Water Contam Ind | Yes |
| Surface Contam Ind | Yes |
| Amount Released | 1509 |
| Rel Water Name | Yellowstone River |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| High Pop Ind | Yes |
| High Pop Yes No | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Usa Drinking Ind | Yes |
| Usa Drinking Yes No | Yes |
| Est Cost Oper Paid | 7500000 |
| Est Cost Gas Released | 150000 |
| Est Cost Prop Damage | 5000000 |
| Est Cost Emergency | 100000000 |
| Est Cost Environmental | 0 |
| Est Cost Other | 22350000 |
| Est Cost Other Details | Environmental & Emergency Response Combined Other Cost: Explained In Section H |
| Prpty | 135000000 |
| Accident Psig | 525 |
| Mop Psig | 960 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 1709 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | Yes |
| Cpm Conf Ind | Yes |
| Investigation Status | No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate) |
| Investigation Status Details | Controller recognized the incident and took steps necessary to mitigate the situation. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Natural Force Damage |
| Cause Details | Heavy Rains/floods |
| Natural Force Type | Heavy Rains/floods |
| Heavy Rains Subtype | Washouts/scouring |
| Nf Extreme Weather Ind | Yes |
| Nf Other Ind | Yes |
| Nf Extreme Weather Details | Heavy Rains And Flood. |
| Preparer Name | M****** B***** |
| Preparer Title | Pipeline Safety Advisor |
| Preparer Email | M***************@e*********.com |
| Preparer Telephone | 832-624-7879 |
| Preparer Fax | 262-313-1317 |
| Prepared Date | 2015-12-15 00:00:00 |
| Authorizer Name | M*** B******* |
| Authorizer Telephone | 587-476-4074 |
| Authorizer Title | Sshe Manager |
| Authorizer Email | M**********************@e***.ca |
| Narrative | 1. In reference to part a9 and d5b, estimate of the release was changed to 1509 bbls. On 1-19-12 2. In reference to section b12, empco was unable to determine the water depth at the location of the accident. The closest gauge downstream measured 13.91 ft. 3. In addition to the fbe coating the pipe has a 1 inch concrete "skin" for abrasion r�sistance in reference section 3h. 4. In reference to a4, a14a and a18a, the system pressure dropped at approximately 22:40. The silvertip station pumps were shut down by the controller by approximately 22:48. Positive confirmation of the accident occurred at approximately 23:45 when empco was notified by laurel emergency responders. 5. Supplemental report created on 1-27-12 to change release amount from 1000 to 1509 bbls and provide additional cost information. 6. Emergency response and environmental remediation cost are combined in section d. (8d & 8e) 7. Section d. 8f estimated other cost 22,350,000 includes the hdd's at rock creek and clarks fork, pipe extraction, and other restart costs. 8. Damaged segments of the ruptured pipeline were removed and shipped to a third party metallurgy laboratory for analysis. The metallurgy laboratory report was sent to PHMSA on 8-6-12. 9. Part g-apparent cause narrative on july 1, 2011, the silvertip pipeline suffered a loss of containment at a crossing of the yellowstone river in laurel, mt during flood and high water conditions that persisted for more than a month. Kiefner & associates, inc. Conducted a metallurgical examination of the failed pipe and concluded that the pipeline failed at a girth weld as a result of the effects of external loading that occurred due to exposure to flood conditions. 10. Supplemental report created per federal register change to collect pipe data pipe adjacent to girth weld in part c 3 a-h. |
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