Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-11-26 — TX
Operator
El Paso Natural Gas Co
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2024-11-26 00:00 UTC
Report number
Location
TX
Narrative
Commercial power was lost at the epng plains station for about three hours due to weather conditions and caused pressure to back up at the eunice compressor station. The pressure backup into the downstream facilities on the epng line 1102 led to the actuation of the relief valve outside of the eunice compressor station. The employees on site identified the incident when it occurred and notified the control room. The control-room maintained contact with employees at the plains and eunice stations as the incident unfolded. Since employees were on site at both the epng plains station and eunice station during the initial occurrence of the event, the response was very timely, and the vent was estimated to last approximately 45 minutes. A km employee manually shut a valve under the pressure relief valve to stop the release.
Detailed record list
Report Received Date
2024-11-26 00:00:00
Iyear
2024
Report Number
20240131
Supplemental Number
40855
Report Type
Supplemental Final
Operator Id
4280
Name
El Paso Natural Gas Co
Operator Street Address
1001 Louisiana St, Ste 1000
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002-5089
Time Zone
Mountain
Daylight Savings Ind
No
Location Latitude
32.54480556
Location Longitude
-103.2479444
Nrc Rpt Num
1415419
Additional Nrc Report Numbers
1415504
Commodity Released Type
Natural Gas
Unintentional Release
18070
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
Relief Valve Release Was Due To Power Loss And Pressure Increase
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Valve Was Closed At The Location Of The Relief Valve Release. The Upstream Valve Was Not Closed
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Valve Was Closed At The Location Of The Relief Valve Release. The Downstream Valve Was Not Closed
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Nm
Onshore Postal Code
88231
Onshore City Name
Oil Center
Onshore County Name
Lea
Designated Location
Milepost
Designated Name
244
Pipe Fac Name
El Paso Natural Gas
Segment Name
Epng L1102
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Valve
Valve Type
Relief Valve
Installation Year
1948
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Relief Valve
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
555
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
25659
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
100
Est Cost Other
0
Gas Cost In Mcf
1.42
Prpty
25759
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
578
Gas Flow In Pipe In Mcf
350000
Mop Psig
580
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1970-07-01 00:00:00
Maop Reversal Flow Ind
Bi-Directional
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Length Segment Isolated
20
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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 incident is deemed independent of controller action.
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
Relief Valve Ind
Yes
Additional Overpressure Ind
Yes
Additional Electricity Ind
Yes
Nf Heavy Rains Ind
Yes
Nf Lightning Ind
Yes
Nf High Winds Ind
Yes
Preparer Name
E****** D*****
Preparer Title
Pipeline Engineer
Preparer Email
E*************@k***********.com
Preparer Telephone
832-374-1936
Authorizer Name
C****** P********
Authorizer Title
Manager - Engineering
Authorizer Telephone
713-420-2460
Authorizer Email
C****************@k***********.com
Narrative
Commercial power was lost at the epng plains station for about three hours due to weather conditions and caused pressure to back up at the eunice compressor station. The pressure backup into the downstream facilities on the epng line 1102 led to the actuation of the relief valve outside of the eunice compressor station. The employees on site identified the incident when it occurred and notified the control room. The control-room maintained contact with employees at the plains and eunice stations as the incident unfolded. Since employees were on site at both the epng plains station and eunice station during the initial occurrence of the event, the response was very timely, and the vent was estimated to last approximately 45 minutes. A km employee manually shut a valve under the pressure relief valve to stop the release.
| Report Received Date | 2024-11-26 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240131 |
| Supplemental Number | 40855 |
| Report Type | Supplemental Final |
| Operator Id | 4280 PHMSA Enforcement |
| Name | El Paso Natural Gas Co |
| Operator Street Address | 1001 Louisiana St, Ste 1000 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002-5089 |
| Time Zone | Mountain |
| Daylight Savings Ind | No |
| Location Latitude | 32.54480556 Google Maps OpenStreetMap |
| Location Longitude | -103.2479444 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1415419 NRC Report How to search |
| Additional Nrc Report Numbers | 1415504 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 18070 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Relief Valve Release Was Due To Power Loss And Pressure Increase |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Valve Was Closed At The Location Of The Relief Valve Release. The Upstream Valve Was Not Closed |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Valve Was Closed At The Location Of The Relief Valve Release. The Downstream Valve Was Not Closed |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Nm |
| Onshore Postal Code | 88231 |
| Onshore City Name | Oil Center |
| Onshore County Name | Lea |
| Designated Location | Milepost |
| Designated Name | 244 |
| Pipe Fac Name | El Paso Natural Gas |
| Segment Name | Epng L1102 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Valve |
| Valve Type | Relief Valve |
| Installation Year | 1948 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Relief Valve |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 555 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 25659 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 100 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 1.42 |
| Prpty | 25759 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 578 |
| Gas Flow In Pipe In Mcf | 350000 |
| Mop Psig | 580 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1970-07-01 00:00:00 |
| Maop Reversal Flow Ind | Bi-Directional |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Length Segment Isolated | 20 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| 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 incident is deemed independent of controller action. |
| 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 |
| Relief Valve Ind | Yes |
| Additional Overpressure Ind | Yes |
| Additional Electricity Ind | Yes |
| Nf Heavy Rains Ind | Yes |
| Nf Lightning Ind | Yes |
| Nf High Winds Ind | Yes |
| Preparer Name | E****** D***** |
| Preparer Title | Pipeline Engineer |
| Preparer Email | E*************@k***********.com |
| Preparer Telephone | 832-374-1936 |
| Authorizer Name | C****** P******** |
| Authorizer Title | Manager - Engineering |
| Authorizer Telephone | 713-420-2460 |
| Authorizer Email | C****************@k***********.com |
| Narrative | Commercial power was lost at the epng plains station for about three hours due to weather conditions and caused pressure to back up at the eunice compressor station. The pressure backup into the downstream facilities on the epng line 1102 led to the actuation of the relief valve outside of the eunice compressor station. The employees on site identified the incident when it occurred and notified the control room. The control-room maintained contact with employees at the plains and eunice stations as the incident unfolded. Since employees were on site at both the epng plains station and eunice station during the initial occurrence of the event, the response was very timely, and the vent was estimated to last approximately 45 minutes. A km employee manually shut a valve under the pressure relief valve to stop the release. |
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