Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2024-06-14 — TX
Operator
Enbridge Energy, Limited Partnership
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$26,411
Incident datetime
2024-06-14 00:00 UTC
Report number
Location
TX
Narrative
On may 17, 2024, at approximately 7:52 pm cdt, an enbridge technician at the walworth station discovered crude oil had misted onto the line 14 unit pump 3 as well as the surrounding equipment and nearby gravel. The technician contacted the edmonton control center, and the unit was isolated. At approximately 8:03 pm cdt the manager on call and the technical supervisor were notified. It was determined at this time that the cleanup and repair costs would exceed the $50,000 nrc reporting threshold. Operations personnel were dispatched to the site for clean-up and remediation. It is estimated that approximately 15 gallons of crude oil was released from a pinhole in the 1/2" stainless steel tubing on the seal flush line of the unit pump. The unit was locked out and isolated until repairs could be made. All impacted gravel has been removed from the release site. The nrc was notified on may 17, 2024, at 8:56 pm cdt (nrc # 1399286). A 48-hour update to the nrc was made on may 19, 2024, at 12:03 pm cdt (nrc# 1399381). The unit motor was sent in for internal cleaning with a third party, tubing was replaced and went back into service on september 12, 2024. The cause of the release was due to abrasive wear in the tubing from solids in the process flow allowing the tubing to thin over time. This caused localized thinning around the 90-degree bend, ending in a small rupture point in the tubing. Due to the excessive wear within the tubing and absence of orifices, thicker wall tubing and orifices will be installed.
Detailed record list
Report Received Date
2024-06-14 00:00:00
Iyear
2024
Report Number
20240144
Supplemental Number
40049
Report Type
Supplemental 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
42.538949
Location Longitude
-88.634333
Commodity Released Type
Crude Oil
Unintentional Release Bbls
0.36
Recovered Bbls
0.36
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 Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
Unit Was Isolated
Communication State Fed Ind
No
Nrc Rpt Num
1399286
Additional Nrc Report Numbers
1399381
Ignite Ind
No
Notify Qualified Indiv Ind
No
Oil Spill Removal Org Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Walworth Station
Segment Name
Line 14 Unit 3 Pump
Onshore State Abbreviation
Wi
Onshore Postal Code
53184
Onshore City Name
Walworth
Onshore County Name
Walworth
Designated Location
Milepost
Designated Name
341.35
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Tubing
Tubing Material
Stainless Steel
Tubing Type
Rigid
Installation Year
2009
Manufactured Year
2009
Material Involved
Material Other Than Carbon Steel
Material Details
Stainless Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
Yes
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
30
Est Cost Prop Damage
26411
Est Cost Emergency
6647
Est Cost Environmental
62890
Est Cost Other
0
Prpty
95978
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
865
Mop Psig
1440
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2007-08-19 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
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
Lack of control center involvement. Release was discovered by field personnel.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Defective Or Loose Tubing Or Fitting
Eq Failure Type
Defective Or Loose Tubing Or Fitting
Additional Erosion Wear Ind
Yes
Preparer Name
S**** S****
Preparer Title
Advisor Regulatory Compliance
Preparer Email
S**********@e*******.com
Preparer Telephone
7153953620
Prepared Date
2024-09-27 00:00:00
Authorizer Name
L*** S**********
Authorizer Telephone
7153941584
Authorizer Title
Supervisor Regulatory Compliance
Authorizer Email
L***************@e*******.com
Narrative
On may 17, 2024, at approximately 7:52 pm cdt, an enbridge technician at the walworth station discovered crude oil had misted onto the line 14 unit pump 3 as well as the surrounding equipment and nearby gravel. The technician contacted the edmonton control center, and the unit was isolated. At approximately 8:03 pm cdt the manager on call and the technical supervisor were notified. It was determined at this time that the cleanup and repair costs would exceed the $50,000 nrc reporting threshold. Operations personnel were dispatched to the site for clean-up and remediation. It is estimated that approximately 15 gallons of crude oil was released from a pinhole in the 1/2" stainless steel tubing on the seal flush line of the unit pump. The unit was locked out and isolated until repairs could be made. All impacted gravel has been removed from the release site. The nrc was notified on may 17, 2024, at 8:56 pm cdt (nrc # 1399286). A 48-hour update to the nrc was made on may 19, 2024, at 12:03 pm cdt (nrc# 1399381). The unit motor was sent in for internal cleaning with a third party, tubing was replaced and went back into service on september 12, 2024. The cause of the release was due to abrasive wear in the tubing from solids in the process flow allowing the tubing to thin over time. This caused localized thinning around the 90-degree bend, ending in a small rupture point in the tubing. Due to the excessive wear within the tubing and absence of orifices, thicker wall tubing and orifices will be installed.
| Report Received Date | 2024-06-14 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240144 |
| Supplemental Number | 40049 |
| Report Type | Supplemental 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 | 42.538949 Google Maps OpenStreetMap |
| Location Longitude | -88.634333 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 0.36 |
| Recovered Bbls | 0.36 |
| 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 Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Unit Was Isolated |
| Communication State Fed Ind | No |
| Nrc Rpt Num | 1399286 NRC Report How to search |
| Additional Nrc Report Numbers | 1399381 |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | No |
| Oil Spill Removal Org Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Walworth Station |
| Segment Name | Line 14 Unit 3 Pump |
| Onshore State Abbreviation | Wi |
| Onshore Postal Code | 53184 |
| Onshore City Name | Walworth |
| Onshore County Name | Walworth |
| Designated Location | Milepost |
| Designated Name | 341.35 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Tubing |
| Tubing Material | Stainless Steel |
| Tubing Type | Rigid |
| Installation Year | 2009 |
| Manufactured Year | 2009 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Stainless Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| 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 | 30 |
| Est Cost Prop Damage | 26411 |
| Est Cost Emergency | 6647 |
| Est Cost Environmental | 62890 |
| Est Cost Other | 0 |
| Prpty | 95978 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 865 |
| Mop Psig | 1440 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2007-08-19 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 | 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 | Lack of control center involvement. Release was discovered by field personnel. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Defective Or Loose Tubing Or Fitting |
| Eq Failure Type | Defective Or Loose Tubing Or Fitting |
| Additional Erosion Wear Ind | Yes |
| Preparer Name | S**** S**** |
| Preparer Title | Advisor Regulatory Compliance |
| Preparer Email | S**********@e*******.com |
| Preparer Telephone | 7153953620 |
| Prepared Date | 2024-09-27 00:00:00 |
| Authorizer Name | L*** S********** |
| Authorizer Telephone | 7153941584 |
| Authorizer Title | Supervisor Regulatory Compliance |
| Authorizer Email | L***************@e*******.com |
| Narrative | On may 17, 2024, at approximately 7:52 pm cdt, an enbridge technician at the walworth station discovered crude oil had misted onto the line 14 unit pump 3 as well as the surrounding equipment and nearby gravel. The technician contacted the edmonton control center, and the unit was isolated. At approximately 8:03 pm cdt the manager on call and the technical supervisor were notified. It was determined at this time that the cleanup and repair costs would exceed the $50,000 nrc reporting threshold. Operations personnel were dispatched to the site for clean-up and remediation. It is estimated that approximately 15 gallons of crude oil was released from a pinhole in the 1/2" stainless steel tubing on the seal flush line of the unit pump. The unit was locked out and isolated until repairs could be made. All impacted gravel has been removed from the release site. The nrc was notified on may 17, 2024, at 8:56 pm cdt (nrc # 1399286). A 48-hour update to the nrc was made on may 19, 2024, at 12:03 pm cdt (nrc# 1399381). The unit motor was sent in for internal cleaning with a third party, tubing was replaced and went back into service on september 12, 2024. The cause of the release was due to abrasive wear in the tubing from solids in the process flow allowing the tubing to thin over time. This caused localized thinning around the 90-degree bend, ending in a small rupture point in the tubing. Due to the excessive wear within the tubing and absence of orifices, thicker wall tubing and orifices will be installed. |
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