Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2019-04-13 — TX
Operator
Enbridge Energy, Limited Partnership
Cause
Corrosion Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$154,723
Incident datetime
2019-04-13 12:15
Report number
Location
TX
Narrative
On april 4, 2019 at approximately 10:00 am cdt crude oil was discovered in an excavation near valve 221-v-2406 within the superior terminal (this excavation was unrelated to this incident). The location of the discovered product was in an area of a historical release site, therefore operations personnel monitored the area and installed three potholes in an effort to determine if the crude oil was from a current or historical release. On april 6, 2019 an oil/water mixture was discovered in the potholes, the control center was contacted and the area of concern was isolated and pipeline maintenance personnel began excavating to investigate the source of the release. While onsite to observe a delivery into tank 24 on april 13, 2019 at approximately 12:15 pm cdt, field personnel observed a pinhole leak at the 6:00 position of the girth weld on a 45 degree elbow that was on the short piece of 24" piping that connected line 6 with the tank 24 header line. The nrc was notified on april 13, 2019 at 1:11 pm cdt (report #1242662). The 48-hour nrc notification was made on april 15, 2019 at 9:16 am cdt (report #1242765). After further investigation it was determined that internal corrosion caused the pinhole which led to the release of two barrels of crude oil. A leak clamp was installed over the failure. Tank 24 is currently out of service for an API 653 inspection. This short piece of dead leg piping will be removed from the system prior to tank 24 going back into service. Approximately 350 cubic yards of contaminated soil will be disposed of at an approved landfill.
Detailed record list
Report Received Date
2019-05-01 00:00:00
Iyear
2019
Report Number
20190144
Supplemental Number
32056
Report Type
Original Final
Operator Id
11169
Name
Enbridge Energy, Limited Partnership
Operator Street Address
915 N Eldridge Parkway, Suite 1100
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Local Datetime
2019-04-04 10:00:00
Location Latitude
46.687573
Location Longitude
-92.058995
Commodity Released Type
Crude Oil
Unintentional Release Bbls
2
Recovered Bbls
2
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2019-04-13 12:15:00
System Part Involved
Onshore Terminal/tank Farm Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Area Was Isolated
On Site Datetime
2019-04-04 10:00:00
Nrc Rpt Datetime
2019-04-13 13:11:00
Nrc Rpt Num
1242662
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Superior Terminal
Segment Name
Tank 24 Header Line
Onshore State Abbreviation
Wi
Onshore Postal Code
54880
Onshore City Name
Superior
Onshore County Name
Douglas
Designated Location
Milepost/valve Station
Designated Name
1098
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Exposed Due To Excavation
Depth Of Cover
180
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Weld, Including Heat-Affected Zone
Pipe Diameter
24
Pipe Wall Thickness
0.375
Pipe Smys
35000
Pipe Specification
Api 5l
Pipe Seam Type
Erw � Unknown Frequency
Pipe Manufacturer
Uknown
Pipe Coating Type
Coal Tar
Weld Subtype
Pipe Girth Weld
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Usa Drinking Ind
Yes
Usa Drinking Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
128
Est Cost Prop Damage
154723
Est Cost Emergency
248
Est Cost Environmental
82500
Est Cost Other
0
Prpty
237599
Accident Psig
29
Mop Psig
275
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
No
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
The small amount of volume would not be detected through a tank imbalance as it would not break any thresholds.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Not Cut Open
Int Water Acid Ind
Yes
Int Field Exam Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
No
Corrosion Lining
No
Cleaning Dewatering
Not Applicable - Not Mainline Pipe
Corrosion Coupons
Not Applicable - Not Mainline Pipe
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
S**** S****
Preparer Title
Sr Compliance Analyst
Preparer Email
S**********@e*******.com
Preparer Telephone
715-395-3620
Prepared Date
2019-05-01 00:00:00
Authorizer Name
R** C*******
Authorizer Telephone
715-395-3619
Authorizer Title
Supervisor Us Pipeline Compliance
Authorizer Email
R***********@e*******.com
Narrative
On april 4, 2019 at approximately 10:00 am cdt crude oil was discovered in an excavation near valve 221-v-2406 within the superior terminal (this excavation was unrelated to this incident). The location of the discovered product was in an area of a historical release site, therefore operations personnel monitored the area and installed three potholes in an effort to determine if the crude oil was from a current or historical release. On april 6, 2019 an oil/water mixture was discovered in the potholes, the control center was contacted and the area of concern was isolated and pipeline maintenance personnel began excavating to investigate the source of the release. While onsite to observe a delivery into tank 24 on april 13, 2019 at approximately 12:15 pm cdt, field personnel observed a pinhole leak at the 6:00 position of the girth weld on a 45 degree elbow that was on the short piece of 24" piping that connected line 6 with the tank 24 header line. The nrc was notified on april 13, 2019 at 1:11 pm cdt (report #1242662). The 48-hour nrc notification was made on april 15, 2019 at 9:16 am cdt (report #1242765). After further investigation it was determined that internal corrosion caused the pinhole which led to the release of two barrels of crude oil. A leak clamp was installed over the failure. Tank 24 is currently out of service for an API 653 inspection. This short piece of dead leg piping will be removed from the system prior to tank 24 going back into service. Approximately 350 cubic yards of contaminated soil will be disposed of at an approved landfill.
| Report Received Date | 2019-05-01 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190144 |
| Supplemental Number | 32056 |
| Report Type | Original Final |
| Operator Id | 11169 PHMSA Enforcement |
| Name | Enbridge Energy, Limited Partnership |
| Operator Street Address | 915 N Eldridge Parkway, Suite 1100 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Local Datetime | 2019-04-04 10:00:00 |
| Location Latitude | 46.687573 Google Maps OpenStreetMap |
| Location Longitude | -92.058995 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 2 |
| Recovered Bbls | 2 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2019-04-13 12:15:00 |
| System Part Involved | Onshore Terminal/tank Farm Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Area Was Isolated |
| On Site Datetime | 2019-04-04 10:00:00 |
| Nrc Rpt Datetime | 2019-04-13 13:11:00 |
| Nrc Rpt Num | 1242662 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Superior Terminal |
| Segment Name | Tank 24 Header Line |
| Onshore State Abbreviation | Wi |
| Onshore Postal Code | 54880 |
| Onshore City Name | Superior |
| Onshore County Name | Douglas |
| Designated Location | Milepost/valve Station |
| Designated Name | 1098 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Exposed Due To Excavation |
| Depth Of Cover | 180 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Weld, Including Heat-Affected Zone |
| Pipe Diameter | 24 |
| Pipe Wall Thickness | 0.375 |
| Pipe Smys | 35000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Erw � Unknown Frequency |
| Pipe Manufacturer | Uknown |
| Pipe Coating Type | Coal Tar |
| Weld Subtype | Pipe Girth Weld |
| Installation Year | Unknown |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Usa Drinking Ind | Yes |
| Usa Drinking Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 128 |
| Est Cost Prop Damage | 154723 |
| Est Cost Emergency | 248 |
| Est Cost Environmental | 82500 |
| Est Cost Other | 0 |
| Prpty | 237599 |
| Accident Psig | 29 |
| Mop Psig | 275 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | No |
| 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 | The small amount of volume would not be detected through a tank imbalance as it would not break any thresholds. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Not Cut Open |
| Int Water Acid Ind | Yes |
| Int Field Exam Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | No |
| Corrosion Lining | No |
| Cleaning Dewatering | Not Applicable - Not Mainline Pipe |
| Corrosion Coupons | Not Applicable - Not Mainline Pipe |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | S**** S**** |
| Preparer Title | Sr Compliance Analyst |
| Preparer Email | S**********@e*******.com |
| Preparer Telephone | 715-395-3620 |
| Prepared Date | 2019-05-01 00:00:00 |
| Authorizer Name | R** C******* |
| Authorizer Telephone | 715-395-3619 |
| Authorizer Title | Supervisor Us Pipeline Compliance |
| Authorizer Email | R***********@e*******.com |
| Narrative | On april 4, 2019 at approximately 10:00 am cdt crude oil was discovered in an excavation near valve 221-v-2406 within the superior terminal (this excavation was unrelated to this incident). The location of the discovered product was in an area of a historical release site, therefore operations personnel monitored the area and installed three potholes in an effort to determine if the crude oil was from a current or historical release. On april 6, 2019 an oil/water mixture was discovered in the potholes, the control center was contacted and the area of concern was isolated and pipeline maintenance personnel began excavating to investigate the source of the release. While onsite to observe a delivery into tank 24 on april 13, 2019 at approximately 12:15 pm cdt, field personnel observed a pinhole leak at the 6:00 position of the girth weld on a 45 degree elbow that was on the short piece of 24" piping that connected line 6 with the tank 24 header line. The nrc was notified on april 13, 2019 at 1:11 pm cdt (report #1242662). The 48-hour nrc notification was made on april 15, 2019 at 9:16 am cdt (report #1242765). After further investigation it was determined that internal corrosion caused the pinhole which led to the release of two barrels of crude oil. A leak clamp was installed over the failure. Tank 24 is currently out of service for an API 653 inspection. This short piece of dead leg piping will be removed from the system prior to tank 24 going back into service. Approximately 350 cubic yards of contaminated soil will be disposed of at an approved landfill. |
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