Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2024-12-18 — TX
Operator
Enbridge Energy, Limited Partnership
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$52,000
Incident datetime
2024-12-18 00:00 UTC
Report number
Location
TX
Narrative
On november 18, 2024, at 9:17 am cst, a technician was doing maintenance near the line 4 unit 2 valve (dn-4-udv-21) at donaldson station. During a walk around they discovered crude oil on the valve and the surrounding ground. The edmonton control center was immediately notified, and the unit was isolated. The source of the release was a leaking valve stem seal that released approximately 1.25 gallons of crude oil. The nrc was notified on november 18, 2024, at 10:16 am cst (nrc #1416706). The minnesota duty officer was also notified (#224022). Operations and contracted labor responded to the site to clean up any contaminated soil. Operations performed a stem seal packing operation after the valve was closed which stopped the leakage. A 48-hour update to the nrc was made on november 20, 2024, at 10:01 am cst (nrc #1416880). All contaminated soil has been removed from the release site. The repair assembly was installed on december 18, 2024. Enbridge personnel completed the stem seal investigation and repair with the manufacturer present. It was determined that two contributing factors caused the stem seal failure. The first observation was debris build-up within the stem seal assembly. The observed debris could have contributed to the damaged stem. This debris could have been left in the assembly during manufacturing. The second observation was that the stem was damaged/gouged which could have also occurred during the manufacturing process. The damaged stem created a leak path for the seal to fail. The actual volume released at donaldson station was 0.02 barrels (1.25 gallons) of crude oil. The PHMSA portal does not recognize volumes less than 0.1 barrels therefore that is the volume entered.
Detailed record list
Report Received Date
2024-12-18 00:00:00
Iyear
2024
Report Number
20240291
Supplemental Number
40423
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
No
Location Latitude
48.573439
Location Longitude
-96.934506
Commodity Released Type
Crude Oil
Unintentional Release Bbls
0.1
Recovered Bbls
0.1
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
No Shutdown Was Required; Unit Was Isolated And Line Kept Running.
Communication State Fed Ind
No
Nrc Rpt Num
1416706
Additional Nrc Report Numbers
1416880
Ignite Ind
No
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Donaldson Station
Segment Name
Dn-4-Udv-21
Onshore State Abbreviation
Mn
Onshore Postal Code
56720
Onshore City Name
Donaldson
Onshore County Name
Kittson
Designated Location
Milepost
Designated Name
814.07
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
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
1998
Manufactured Year
1998
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Seal Or Packing
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
2
Est Cost Prop Damage
52000
Est Cost Emergency
5000
Est Cost Environmental
1000
Est Cost Other
0
Prpty
58002
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
736
Mop Psig
931
Mop Cfr Section
Subpart E Pressure Test �195.406(A)(3)
Maop Established Date
1998-10-22 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
Control room operator had no involvement in this event. Release was identified by field personnel.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Non-Threaded Connection Failure
Eq Failure Type
Non-Threaded Connection Failure
Other Non Threaded Ind
Seal (Not Pump Seal) Or Packing
Additional Defect Ind
Yes
Additional Erosion Wear Ind
Yes
Preparer Name
S**** S****
Preparer Title
Advisor Regulatory Compliance
Preparer Email
S**********@e*******.com
Preparer Telephone
7153953620
Prepared Date
2025-01-17 00:00:00
Authorizer Name
L*** S**********
Authorizer Telephone
7153941584
Authorizer Title
Supervisor Regulatory Compliance
Authorizer Email
L***************@e*******.com
Narrative
On november 18, 2024, at 9:17 am cst, a technician was doing maintenance near the line 4 unit 2 valve (dn-4-udv-21) at donaldson station. During a walk around they discovered crude oil on the valve and the surrounding ground. The edmonton control center was immediately notified, and the unit was isolated. The source of the release was a leaking valve stem seal that released approximately 1.25 gallons of crude oil. The nrc was notified on november 18, 2024, at 10:16 am cst (nrc #1416706). The minnesota duty officer was also notified (#224022). Operations and contracted labor responded to the site to clean up any contaminated soil. Operations performed a stem seal packing operation after the valve was closed which stopped the leakage. A 48-hour update to the nrc was made on november 20, 2024, at 10:01 am cst (nrc #1416880). All contaminated soil has been removed from the release site. The repair assembly was installed on december 18, 2024. Enbridge personnel completed the stem seal investigation and repair with the manufacturer present. It was determined that two contributing factors caused the stem seal failure. The first observation was debris build-up within the stem seal assembly. The observed debris could have contributed to the damaged stem. This debris could have been left in the assembly during manufacturing. The second observation was that the stem was damaged/gouged which could have also occurred during the manufacturing process. The damaged stem created a leak path for the seal to fail. The actual volume released at donaldson station was 0.02 barrels (1.25 gallons) of crude oil. The PHMSA portal does not recognize volumes less than 0.1 barrels therefore that is the volume entered.
| Report Received Date | 2024-12-18 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240291 |
| Supplemental Number | 40423 |
| 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 | No |
| Location Latitude | 48.573439 Google Maps OpenStreetMap |
| Location Longitude | -96.934506 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 0.1 |
| Recovered Bbls | 0.1 |
| 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 | No Shutdown Was Required; Unit Was Isolated And Line Kept Running. |
| Communication State Fed Ind | No |
| Nrc Rpt Num | 1416706 NRC Report How to search |
| Additional Nrc Report Numbers | 1416880 |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Donaldson Station |
| Segment Name | Dn-4-Udv-21 |
| Onshore State Abbreviation | Mn |
| Onshore Postal Code | 56720 |
| Onshore City Name | Donaldson |
| Onshore County Name | Kittson |
| Designated Location | Milepost |
| Designated Name | 814.07 |
| 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 | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | 1998 |
| Manufactured Year | 1998 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| 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 | 2 |
| Est Cost Prop Damage | 52000 |
| Est Cost Emergency | 5000 |
| Est Cost Environmental | 1000 |
| Est Cost Other | 0 |
| Prpty | 58002 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 736 |
| Mop Psig | 931 |
| Mop Cfr Section | Subpart E Pressure Test �195.406(A)(3) View CFR 49 §192 |
| Maop Established Date | 1998-10-22 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 | Control room operator had no involvement in this event. Release was identified by field personnel. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Non-Threaded Connection Failure |
| Eq Failure Type | Non-Threaded Connection Failure |
| Other Non Threaded Ind | Seal (Not Pump Seal) Or Packing |
| Additional Defect Ind | Yes |
| Additional Erosion Wear Ind | Yes |
| Preparer Name | S**** S**** |
| Preparer Title | Advisor Regulatory Compliance |
| Preparer Email | S**********@e*******.com |
| Preparer Telephone | 7153953620 |
| Prepared Date | 2025-01-17 00:00:00 |
| Authorizer Name | L*** S********** |
| Authorizer Telephone | 7153941584 |
| Authorizer Title | Supervisor Regulatory Compliance |
| Authorizer Email | L***************@e*******.com |
| Narrative | On november 18, 2024, at 9:17 am cst, a technician was doing maintenance near the line 4 unit 2 valve (dn-4-udv-21) at donaldson station. During a walk around they discovered crude oil on the valve and the surrounding ground. The edmonton control center was immediately notified, and the unit was isolated. The source of the release was a leaking valve stem seal that released approximately 1.25 gallons of crude oil. The nrc was notified on november 18, 2024, at 10:16 am cst (nrc #1416706). The minnesota duty officer was also notified (#224022). Operations and contracted labor responded to the site to clean up any contaminated soil. Operations performed a stem seal packing operation after the valve was closed which stopped the leakage. A 48-hour update to the nrc was made on november 20, 2024, at 10:01 am cst (nrc #1416880). All contaminated soil has been removed from the release site. The repair assembly was installed on december 18, 2024. Enbridge personnel completed the stem seal investigation and repair with the manufacturer present. It was determined that two contributing factors caused the stem seal failure. The first observation was debris build-up within the stem seal assembly. The observed debris could have contributed to the damaged stem. This debris could have been left in the assembly during manufacturing. The second observation was that the stem was damaged/gouged which could have also occurred during the manufacturing process. The damaged stem created a leak path for the seal to fail. The actual volume released at donaldson station was 0.02 barrels (1.25 gallons) of crude oil. The PHMSA portal does not recognize volumes less than 0.1 barrels therefore that is the volume entered. |
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