Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2025-05-16 — TX
Operator
Enbridge Energy, Limited Partnership
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$26,850
Incident datetime
2025-05-16 00:00 UTC
Report number
Location
TX
Narrative
On april 17, 2025, at approximately 8:24 am cdt, technicians at the superior terminal were completing maintenance and observing the startup of the line 6, unit 3 pump after a seal replacement. During startup, a release of product was found to be coming from the outboard seal on unit 3, and an enbridge technician initiated the pump emergency shutdown button. Supervision was notified, and after isolating and locking out the unit, the spill was cleaned up promptly. The volume released was approximately 100 gallons, all of which was contained on the concrete floor within the pump building. Cleanup was completed with approximately 95 gallons of crude oil returned to the system, and clean-up materials were properly disposed of. The seal was replaced, and unit 3 was returned to service. Following the release, the failed seal was submitted to the manufacturer for further analysis. The findings indicated that the seal encountered an unexpected load force on the seal faces during startup, which contributed to its failure. This load force was determined to be a result of the seal installation. Based on these findings, additional steps for the work execution plan were identified to minimize the possibility of a recurrence.
Detailed record list
Report Received Date
2025-05-16 00:00:00
Iyear
2025
Report Number
20250125
Supplemental Number
40900
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
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
46.6898
Location Longitude
-92.0614
Commodity Released Type
Crude Oil
Unintentional Release Bbls
2.38
Recovered Bbls
2.38
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
System Part Involved
Onshore Terminal/tank Farm Equipment And Piping
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
No
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Notify Qualified Indiv Ind
No
Oil Spill Removal Org Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Superior Terminal
Segment Name
6-Up-3
Onshore State Abbreviation
Wi
Onshore Postal Code
54880
Onshore City Name
Superior
Onshore County Name
Douglas
Designated Location
Milepost
Designated Name
1098
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Inside A Building
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pump
Pump Type
Centrifugal
Pump Service Type
Mainline
Installation Year
2017
Manufactured Year
2017
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Seal Or Packing
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
8
Est Cost Prop Damage
26850
Est Cost Emergency
1080
Est Cost Environmental
0
Est Cost Other
0
Prpty
27938
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
677
Mop Psig
1200
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
1996-11-25 00:00:00
Maop Reversal Flow Ind
No
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
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Controller Ind
Yes
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Pump Or Pump-Related Equipment
Eq Failure Type
Pump Or Pump-Related Equipment
Other Pump Ind
Seal/packing Failure
Additional Installation Ind
Yes
Preparer Name
S**** S****
Preparer Title
Advisor Regulatory Compliance
Preparer Email
S**********@e*******.com
Preparer Telephone
7153953620
Prepared Date
2025-05-16 00:00:00
Authorizer Name
L*** S**********
Authorizer Telephone
7153941584
Authorizer Title
Supervisor Regulatory Compliance
Authorizer Email
L***************@e*******.com
Narrative
On april 17, 2025, at approximately 8:24 am cdt, technicians at the superior terminal were completing maintenance and observing the startup of the line 6, unit 3 pump after a seal replacement. During startup, a release of product was found to be coming from the outboard seal on unit 3, and an enbridge technician initiated the pump emergency shutdown button. Supervision was notified, and after isolating and locking out the unit, the spill was cleaned up promptly. The volume released was approximately 100 gallons, all of which was contained on the concrete floor within the pump building. Cleanup was completed with approximately 95 gallons of crude oil returned to the system, and clean-up materials were properly disposed of. The seal was replaced, and unit 3 was returned to service. Following the release, the failed seal was submitted to the manufacturer for further analysis. The findings indicated that the seal encountered an unexpected load force on the seal faces during startup, which contributed to its failure. This load force was determined to be a result of the seal installation. Based on these findings, additional steps for the work execution plan were identified to minimize the possibility of a recurrence.
| Report Received Date | 2025-05-16 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250125 |
| Supplemental Number | 40900 |
| 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 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 46.6898 Google Maps OpenStreetMap |
| Location Longitude | -92.0614 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 2.38 |
| Recovered Bbls | 2.38 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| System Part Involved | Onshore Terminal/tank Farm Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | No |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | No |
| Oil Spill Removal Org Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Superior Terminal |
| Segment Name | 6-Up-3 |
| Onshore State Abbreviation | Wi |
| Onshore Postal Code | 54880 |
| Onshore City Name | Superior |
| Onshore County Name | Douglas |
| Designated Location | Milepost |
| Designated Name | 1098 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Inside A Building |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pump |
| Pump Type | Centrifugal |
| Pump Service Type | Mainline |
| Installation Year | 2017 |
| Manufactured Year | 2017 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 8 |
| Est Cost Prop Damage | 26850 |
| Est Cost Emergency | 1080 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 27938 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 677 |
| Mop Psig | 1200 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 1996-11-25 00:00:00 |
| Maop Reversal Flow Ind | No |
| 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 | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Pump Or Pump-Related Equipment |
| Eq Failure Type | Pump Or Pump-Related Equipment |
| Other Pump Ind | Seal/packing Failure |
| Additional Installation Ind | Yes |
| Preparer Name | S**** S**** |
| Preparer Title | Advisor Regulatory Compliance |
| Preparer Email | S**********@e*******.com |
| Preparer Telephone | 7153953620 |
| Prepared Date | 2025-05-16 00:00:00 |
| Authorizer Name | L*** S********** |
| Authorizer Telephone | 7153941584 |
| Authorizer Title | Supervisor Regulatory Compliance |
| Authorizer Email | L***************@e*******.com |
| Narrative | On april 17, 2025, at approximately 8:24 am cdt, technicians at the superior terminal were completing maintenance and observing the startup of the line 6, unit 3 pump after a seal replacement. During startup, a release of product was found to be coming from the outboard seal on unit 3, and an enbridge technician initiated the pump emergency shutdown button. Supervision was notified, and after isolating and locking out the unit, the spill was cleaned up promptly. The volume released was approximately 100 gallons, all of which was contained on the concrete floor within the pump building. Cleanup was completed with approximately 95 gallons of crude oil returned to the system, and clean-up materials were properly disposed of. The seal was replaced, and unit 3 was returned to service. Following the release, the failed seal was submitted to the manufacturer for further analysis. The findings indicated that the seal encountered an unexpected load force on the seal faces during startup, which contributed to its failure. This load force was determined to be a result of the seal installation. Based on these findings, additional steps for the work execution plan were identified to minimize the possibility of a recurrence. |
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