Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2022-11-05 — TX
Operator
Enbridge Energy, Limited Partnership
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$194,048
Incident datetime
2022-11-05 10:58
Report number
Location
TX
Narrative
On november 5, 2022 storms and high winds occurred in the area around flanagan terminal. Line 61 shut down at 10:41 am cdt due to a 5-7 second power disruption at the terminal which sent a low voltage alarm to the line 61 plc resulting in an emergency shut down to occur on the system cooler. Line 61 mainline delivery pcv closed in approximately 10 seconds which activated the line 61 delivery relief valves to open and direct volume to the dedicated relief tank. The edmonton control center contacted field personnel to investigate the event. Field personnel discovered crude oil on the ground around the relief system at 10:58 am cdt. Approximately 50 barrels of crude oil was released with the majority of product remaining on company property. An immeasurable amount reached the roadside from product mist over due to strong winds. Ics was stood up and osro contractors were mobilized to the site to commence the cleanup. The nrc was notified at 12:00 pm cdt (nrc #1351798). The 48-hour update to the nrc was made on november 7, 2022 at 9:44 am cst (nrc #1351920). The sources of the release have been identified as mechanical failure of certain small-bore components on the line 61 mainline relief system, specifically a needle valve assembly, pt flush ring and associated tubing on a 2" vent valve body relief. Repairs were made and line 61 was returned to service on november 7, 2022 at 1:38 am cst. Approximately 501 tons of contaminated soil was removed from the release site. Through third-party destructive testing of the failed components, the investigation team found that the approximately 10-second closure of the line 61 mainline delivery pcv caused an overload event. Analysis of the damaged and failed components also revealed evidence of high-cycle, intermittent fatigue from induced harmonics on the small-bore equipment, indicating a weakened state prior to the event. The overload event combined with the fatigue led to the subsequent crude oil release.
Detailed record list
Report Received Date
2022-12-05 00:00:00
Iyear
2022
Report Number
20220274
Supplemental Number
37958
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
Local Datetime
2022-11-05 10:58:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
40.94263
Location Longitude
-88.644437
Commodity Released Type
Crude Oil
Unintentional Release Bbls
50
Recovered Bbls
50
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2022-11-05 10:58:00
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
Shutdown Datetime
2022-11-05 10:41:00
Restart Datetime
2022-11-07 01:38:00
Communication State Fed Ind
No
On Site Datetime
2022-11-05 10:58:00
Confirmed Discovery Datetime
2022-11-05 10:58:00
Nrc Rpt Datetime
2022-11-05 12:00:00
Nrc Rpt Num
1351798
Additional Nrc Report Numbers
1351920
Ignite Ind
No
Notify Qualified Indiv Ind
Yes
Qualified Indiv Notif Datetime
2022-11-05 11:15:00
Oil Spill Removal Org Ind
Yes
Osro Activated Datetime
2022-11-05 12:52:00
Osro Arrived On Site Dt
11/5/2022 14:30
Num Pub Evacuated
0
Pipe Fac Name
Flanagan Terminal
Segment Name
61-Vv-11
Onshore State Abbreviation
Il
Onshore Postal Code
61764
Onshore City Name
Pontiac
Onshore County Name
Livingston
Designated Location
Milepost
Designated Name
462
Federal
No
Location Type
Originated On Operator-Controlled Property, But Then Flowed Or Migrated Off The 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
2020
Manufactured Year
2020
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Connection Failure
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
5000
Est Cost Prop Damage
194048
Est Cost Emergency
317148
Est Cost Environmental
330010
Est Cost Other
0
Prpty
846206
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
667
Mop Psig
1440
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2021-02-28 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
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
The release was determined to be outside of the controller's responsibility
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Control Valve Ind
Yes
Additional Vibration Ind
Yes
Additional Electricity Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Overload Event
Preparer Name
S**** S****
Preparer Title
Regulatory Compliance Advisor
Preparer Email
S**********@e*******.com
Preparer Telephone
715-395-3620
Prepared Date
2023-04-20 00:00:00
Authorizer Name
L*** S**********
Authorizer Telephone
715-394-1584
Authorizer Title
Supervisor Us Regulatory Compliance
Authorizer Email
L***************@e*******.com
Narrative
On november 5, 2022 storms and high winds occurred in the area around flanagan terminal. Line 61 shut down at 10:41 am cdt due to a 5-7 second power disruption at the terminal which sent a low voltage alarm to the line 61 plc resulting in an emergency shut down to occur on the system cooler. Line 61 mainline delivery pcv closed in approximately 10 seconds which activated the line 61 delivery relief valves to open and direct volume to the dedicated relief tank. The edmonton control center contacted field personnel to investigate the event. Field personnel discovered crude oil on the ground around the relief system at 10:58 am cdt. Approximately 50 barrels of crude oil was released with the majority of product remaining on company property. An immeasurable amount reached the roadside from product mist over due to strong winds. Ics was stood up and osro contractors were mobilized to the site to commence the cleanup. The nrc was notified at 12:00 pm cdt (nrc #1351798). The 48-hour update to the nrc was made on november 7, 2022 at 9:44 am cst (nrc #1351920). The sources of the release have been identified as mechanical failure of certain small-bore components on the line 61 mainline relief system, specifically a needle valve assembly, pt flush ring and associated tubing on a 2" vent valve body relief. Repairs were made and line 61 was returned to service on november 7, 2022 at 1:38 am cst. Approximately 501 tons of contaminated soil was removed from the release site. Through third-party destructive testing of the failed components, the investigation team found that the approximately 10-second closure of the line 61 mainline delivery pcv caused an overload event. Analysis of the damaged and failed components also revealed evidence of high-cycle, intermittent fatigue from induced harmonics on the small-bore equipment, indicating a weakened state prior to the event. The overload event combined with the fatigue led to the subsequent crude oil release.
| Report Received Date | 2022-12-05 00:00:00 |
|---|---|
| Iyear | 2022 |
| Report Number | 20220274 |
| Supplemental Number | 37958 |
| 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 |
| Local Datetime | 2022-11-05 10:58:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 40.94263 Google Maps OpenStreetMap |
| Location Longitude | -88.644437 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 50 |
| Recovered Bbls | 50 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2022-11-05 10:58:00 |
| 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 |
| Shutdown Datetime | 2022-11-05 10:41:00 |
| Restart Datetime | 2022-11-07 01:38:00 |
| Communication State Fed Ind | No |
| On Site Datetime | 2022-11-05 10:58:00 |
| Confirmed Discovery Datetime | 2022-11-05 10:58:00 |
| Nrc Rpt Datetime | 2022-11-05 12:00:00 |
| Nrc Rpt Num | 1351798 NRC Report How to search |
| Additional Nrc Report Numbers | 1351920 |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | Yes |
| Qualified Indiv Notif Datetime | 2022-11-05 11:15:00 |
| Oil Spill Removal Org Ind | Yes |
| Osro Activated Datetime | 2022-11-05 12:52:00 |
| Osro Arrived On Site Dt | 11/5/2022 14:30 |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Flanagan Terminal |
| Segment Name | 61-Vv-11 |
| Onshore State Abbreviation | Il |
| Onshore Postal Code | 61764 |
| Onshore City Name | Pontiac |
| Onshore County Name | Livingston |
| Designated Location | Milepost |
| Designated Name | 462 |
| Federal | No |
| Location Type | Originated On Operator-Controlled Property, But Then Flowed Or Migrated Off The 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 | 2020 |
| Manufactured Year | 2020 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 5000 |
| Est Cost Prop Damage | 194048 |
| Est Cost Emergency | 317148 |
| Est Cost Environmental | 330010 |
| Est Cost Other | 0 |
| Prpty | 846206 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 667 |
| Mop Psig | 1440 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2021-02-28 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 | 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 | The release was determined to be outside of the controller's responsibility |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Control Valve Ind | Yes |
| Additional Vibration Ind | Yes |
| Additional Electricity Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Overload Event |
| Preparer Name | S**** S**** |
| Preparer Title | Regulatory Compliance Advisor |
| Preparer Email | S**********@e*******.com |
| Preparer Telephone | 715-395-3620 |
| Prepared Date | 2023-04-20 00:00:00 |
| Authorizer Name | L*** S********** |
| Authorizer Telephone | 715-394-1584 |
| Authorizer Title | Supervisor Us Regulatory Compliance |
| Authorizer Email | L***************@e*******.com |
| Narrative | On november 5, 2022 storms and high winds occurred in the area around flanagan terminal. Line 61 shut down at 10:41 am cdt due to a 5-7 second power disruption at the terminal which sent a low voltage alarm to the line 61 plc resulting in an emergency shut down to occur on the system cooler. Line 61 mainline delivery pcv closed in approximately 10 seconds which activated the line 61 delivery relief valves to open and direct volume to the dedicated relief tank. The edmonton control center contacted field personnel to investigate the event. Field personnel discovered crude oil on the ground around the relief system at 10:58 am cdt. Approximately 50 barrels of crude oil was released with the majority of product remaining on company property. An immeasurable amount reached the roadside from product mist over due to strong winds. Ics was stood up and osro contractors were mobilized to the site to commence the cleanup. The nrc was notified at 12:00 pm cdt (nrc #1351798). The 48-hour update to the nrc was made on november 7, 2022 at 9:44 am cst (nrc #1351920). The sources of the release have been identified as mechanical failure of certain small-bore components on the line 61 mainline relief system, specifically a needle valve assembly, pt flush ring and associated tubing on a 2" vent valve body relief. Repairs were made and line 61 was returned to service on november 7, 2022 at 1:38 am cst. Approximately 501 tons of contaminated soil was removed from the release site. Through third-party destructive testing of the failed components, the investigation team found that the approximately 10-second closure of the line 61 mainline delivery pcv caused an overload event. Analysis of the damaged and failed components also revealed evidence of high-cycle, intermittent fatigue from induced harmonics on the small-bore equipment, indicating a weakened state prior to the event. The overload event combined with the fatigue led to the subsequent crude oil release. |
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