Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2015-07-27 — TX
Operator
Enbridge Energy, Limited Partnership
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$92,682
Incident datetime
2015-07-27 07:45
Report number
Location
TX
Narrative
At approximately 7:45 am on july 27, 2015, a line 2 integrity dig crew, upon arrival to the remote valve site at mp 1021.68, noticed that a small amount of crude oil had leaked from a 12" out of service crossover/loop valve which was tied into line 2. The edmonton control center was contacted and line 2 was shut down. Operation crews were dispatched to the site to determine the source of the leak. Upon arrival, it was discovered that approximately one cup of oil had leaked from the valve bonnet. Region management made the decision to isolate the crossover valve via stopple installation and remove it from the system. The national response center notification was made once the final repair plan was determined and the costs associated with that plan were estimated to exceed $50,000. After further investigation, it was determined that the valve was exposed to ambient temperature, causing thermal pressure buildup within the body of the valve. The valve did not contain a pressure relief system, therefore the thermal pressure buildup caused the valve body to leak at the bonnet, releasing a small amount of product. Future line 2 hydrotest preparation digs involving valves without a pressure relief system will be shaded either by a tent over the valve or wrapping with an insulating material. The small amount of contaminated soil will be managed onsite at the enbridge clearbrook minnesota terminal.
Detailed record list
Report Received Date
2015-08-25 00:00:00
Iyear
2015
Report Number
20150305
Supplemental Number
20694
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
2015-07-27 07:45:00
Location Latitude
47.1375
Location Longitude
-93.30972
Commodity Released Type
Crude Oil
Unintentional Release Bbls
0.01
Recovered Bbls
0.01
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
Incident Identified Datetime
2015-07-27 07:45:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2015-07-27 07:50:00
Restart Datetime
2015-07-30 00:30:00
On Site Datetime
2015-07-27 07:45:00
Nrc Rpt Datetime
2015-07-27 14:29:00
Nrc Rpt Num
1123988
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Line 2
Segment Name
Crossover Valve
Onshore State Abbreviation
Mn
Onshore Postal Code
55793
Onshore City Name
Warba
Onshore County Name
Itasca
Designated Location
Milepost/valve Station
Designated Name
1021.68
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Exposed Due To Excavation
Depth Of Cover
35
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
1954
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
Yes
Commodity Reached Hca
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
0
Est Cost Prop Damage
92682
Est Cost Emergency
972
Est Cost Environmental
0
Est Cost Other
0
Prpty
93654
Accident Psig
334
Mop Psig
774
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
30
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
No
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
Release identified in the field by integrity dig crew
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Other Equipment Failure
Eq Failure Type
Other Equipment Failure
Failure Details
Crossover Valve
Additional Thermal Ind
Yes
Preparer Name
S**** S****
Preparer Title
Compliance Analyst
Preparer Email
S**********@e*******.com
Preparer Telephone
715-395-3620
Preparer Fax
715-394-1564
Prepared Date
2015-08-25 00:00:00
Authorizer Name
R** C*******
Authorizer Telephone
715-395-3619
Authorizer Title
Manager Us Pipeline Compliance
Authorizer Email
R***********@e*******.com
Narrative
At approximately 7:45 am on july 27, 2015, a line 2 integrity dig crew, upon arrival to the remote valve site at mp 1021.68, noticed that a small amount of crude oil had leaked from a 12" out of service crossover/loop valve which was tied into line 2. The edmonton control center was contacted and line 2 was shut down. Operation crews were dispatched to the site to determine the source of the leak. Upon arrival, it was discovered that approximately one cup of oil had leaked from the valve bonnet. Region management made the decision to isolate the crossover valve via stopple installation and remove it from the system. The national response center notification was made once the final repair plan was determined and the costs associated with that plan were estimated to exceed $50,000. After further investigation, it was determined that the valve was exposed to ambient temperature, causing thermal pressure buildup within the body of the valve. The valve did not contain a pressure relief system, therefore the thermal pressure buildup caused the valve body to leak at the bonnet, releasing a small amount of product. Future line 2 hydrotest preparation digs involving valves without a pressure relief system will be shaded either by a tent over the valve or wrapping with an insulating material. The small amount of contaminated soil will be managed onsite at the enbridge clearbrook minnesota terminal.
| Report Received Date | 2015-08-25 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150305 |
| Supplemental Number | 20694 |
| 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 | 2015-07-27 07:45:00 |
| Location Latitude | 47.1375 Google Maps OpenStreetMap |
| Location Longitude | -93.30972 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 0.01 |
| Recovered Bbls | 0.01 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| Incident Identified Datetime | 2015-07-27 07:45:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2015-07-27 07:50:00 |
| Restart Datetime | 2015-07-30 00:30:00 |
| On Site Datetime | 2015-07-27 07:45:00 |
| Nrc Rpt Datetime | 2015-07-27 14:29:00 |
| Nrc Rpt Num | 1123988 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Line 2 |
| Segment Name | Crossover Valve |
| Onshore State Abbreviation | Mn |
| Onshore Postal Code | 55793 |
| Onshore City Name | Warba |
| Onshore County Name | Itasca |
| Designated Location | Milepost/valve Station |
| Designated Name | 1021.68 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Exposed Due To Excavation |
| Depth Of Cover | 35 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | 1954 |
| 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 | Yes |
| Commodity Reached Hca | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 0 |
| Est Cost Prop Damage | 92682 |
| Est Cost Emergency | 972 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 93654 |
| Accident Psig | 334 |
| Mop Psig | 774 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 30 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | No |
| 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 | Release identified in the field by integrity dig crew |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Other Equipment Failure |
| Eq Failure Type | Other Equipment Failure |
| Failure Details | Crossover Valve |
| Additional Thermal Ind | Yes |
| Preparer Name | S**** S**** |
| Preparer Title | Compliance Analyst |
| Preparer Email | S**********@e*******.com |
| Preparer Telephone | 715-395-3620 |
| Preparer Fax | 715-394-1564 |
| Prepared Date | 2015-08-25 00:00:00 |
| Authorizer Name | R** C******* |
| Authorizer Telephone | 715-395-3619 |
| Authorizer Title | Manager Us Pipeline Compliance |
| Authorizer Email | R***********@e*******.com |
| Narrative | At approximately 7:45 am on july 27, 2015, a line 2 integrity dig crew, upon arrival to the remote valve site at mp 1021.68, noticed that a small amount of crude oil had leaked from a 12" out of service crossover/loop valve which was tied into line 2. The edmonton control center was contacted and line 2 was shut down. Operation crews were dispatched to the site to determine the source of the leak. Upon arrival, it was discovered that approximately one cup of oil had leaked from the valve bonnet. Region management made the decision to isolate the crossover valve via stopple installation and remove it from the system. The national response center notification was made once the final repair plan was determined and the costs associated with that plan were estimated to exceed $50,000. After further investigation, it was determined that the valve was exposed to ambient temperature, causing thermal pressure buildup within the body of the valve. The valve did not contain a pressure relief system, therefore the thermal pressure buildup caused the valve body to leak at the bonnet, releasing a small amount of product. Future line 2 hydrotest preparation digs involving valves without a pressure relief system will be shaded either by a tent over the valve or wrapping with an insulating material. The small amount of contaminated soil will be managed onsite at the enbridge clearbrook minnesota terminal. |
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