Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2025-08-04 — 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
2025-08-04 00:00 UTC
Report number
Location
TX
Narrative
On july 6th, 2025 a relief valve within the epng l1115 system activated and vented 17,513 mcf of natural gas into the atmosphere as a result of overpressure caused by the upstream epng plains compressor station going offline due to a loss of commercial power. The kinder morgan gas control team was notified by the sheriff's department operator, and the local operations team were dispatched to the site. The gas control team redirected gas flow upstream of the relief valve to lower the pressure and allow the relief valve to close. The epng plains compressor station was subsequently restored to service without any further issues.
Detailed record list
Report Received Date
2025-08-04 00:00:00
Iyear
2025
Report Number
20250086
Supplemental Number
41214
Report Type
Original
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
Central
Daylight Savings Ind
Yes
Location Latitude
32.70381169
Location Longitude
-103.0367154
Nrc Rpt Num
1436173
Additional Nrc Report Numbers
1436356
Commodity Released Type
Natural Gas
Unintentional Release
17513
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
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Redirected Gas Flow Upstream Of The Relief Valve To Reduce Pressure And Enable Relief Valve Closure
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Redirected Gas Flow Upstream Of The Relief Valve To Reduce Pressure And Enable Relief Valve Closure
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Tx
Onshore Postal Code
79360
Onshore City Name
Not Within A Municipality
Onshore County Name
Gaines
Designated Location
Milepost
Designated Name
Mp 55
Pipe Fac Name
El Paso Natural Gas
Segment Name
Epng L1115
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
1958
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
459
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
56742
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
100
Est Cost Other
0
Gas Cost In Mcf
3.24
Prpty
56842
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
568
Gas Flow In Pipe In Mcf
61000
Mop Psig
920
Mop Cfr Section
192.619(C)
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
93400
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
Notification From Emergency Responder
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
Preparer Name
E****** D* L***
Preparer Title
Pipeline Engineer
Preparer Email
E*************@k***********.com
Preparer Telephone
713-420-3530
Authorizer Name
Z*** R*****
Authorizer Title
Director - Engineering
Authorizer Telephone
713-420-2609
Authorizer Email
Z**********@k***********.com
Narrative
On july 6th, 2025 a relief valve within the epng l1115 system activated and vented 17,513 mcf of natural gas into the atmosphere as a result of overpressure caused by the upstream epng plains compressor station going offline due to a loss of commercial power. The kinder morgan gas control team was notified by the sheriff's department operator, and the local operations team were dispatched to the site. The gas control team redirected gas flow upstream of the relief valve to lower the pressure and allow the relief valve to close. The epng plains compressor station was subsequently restored to service without any further issues.
| Report Received Date | 2025-08-04 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250086 |
| Supplemental Number | 41214 |
| Report Type | Original |
| 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 | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 32.70381169 Google Maps OpenStreetMap |
| Location Longitude | -103.0367154 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1436173 NRC Report How to search |
| Additional Nrc Report Numbers | 1436356 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 17513 |
| 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 |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Redirected Gas Flow Upstream Of The Relief Valve To Reduce Pressure And Enable Relief Valve Closure |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Redirected Gas Flow Upstream Of The Relief Valve To Reduce Pressure And Enable Relief Valve Closure |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 79360 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Gaines |
| Designated Location | Milepost |
| Designated Name | Mp 55 |
| Pipe Fac Name | El Paso Natural Gas |
| Segment Name | Epng L1115 |
| 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 | 1958 |
| 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 | 459 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 56742 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 100 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 3.24 |
| Prpty | 56842 |
| 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 | 568 |
| Gas Flow In Pipe In Mcf | 61000 |
| Mop Psig | 920 |
| Mop Cfr Section | 192.619(C) 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 | 93400 |
| 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 | Notification From Emergency Responder |
| 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 |
| Preparer Name | E****** D* L*** |
| Preparer Title | Pipeline Engineer |
| Preparer Email | E*************@k***********.com |
| Preparer Telephone | 713-420-3530 |
| Authorizer Name | Z*** R***** |
| Authorizer Title | Director - Engineering |
| Authorizer Telephone | 713-420-2609 |
| Authorizer Email | Z**********@k***********.com |
| Narrative | On july 6th, 2025 a relief valve within the epng l1115 system activated and vented 17,513 mcf of natural gas into the atmosphere as a result of overpressure caused by the upstream epng plains compressor station going offline due to a loss of commercial power. The kinder morgan gas control team was notified by the sheriff's department operator, and the local operations team were dispatched to the site. The gas control team redirected gas flow upstream of the relief valve to lower the pressure and allow the relief valve to close. The epng plains compressor station was subsequently restored to service without any further issues. |
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