Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2025-09-26 — 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
2025-09-26 09:00
Report number
Location
TX
Narrative
At 8:43 am central time a relief valve on the interconnect between epng lines 1115 and 1102 activated at 568.7 psig releasing 5529 mcf of natural gas before reseating at 536 psig. The valve activated below its set pressure of 591 psig. The increase in pressure was caused when the downstream plains compressor station went offline due to a power interruption, which backed up pressure on the suction side. The station was restored to service eliminating the pressure backup, and there was no repeat of the valve activation.
Detailed record list
Report Received Date
2025-10-24 00:00:00
Iyear
2025
Report Number
20250119
Supplemental Number
41594
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
Local Datetime
2025-09-26 08:43:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
32.703798
Location Longitude
-103.03671
Nrc Rpt Num
1443856
Nrc Rpt Datetime
2025-09-26 09:36:00
Additional Nrc Report Numbers
1444011
Commodity Released Type
Natural Gas
Unintentional Release
5529
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 Reseated And Operation Of Downstream Station Was Restored.
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
None.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Plains Compressor Station Was Restored To Service Ending The Pressure Backup.
Num Pub Evacuated
0
Incident Identified Datetime
2025-09-26 09:00:00
On Site Datetime
2025-09-26 09:43:00
Confirmed Discovery Datetime
2025-09-26 09:43:00
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
55.8
Pipe Fac Name
1100 Series California System Main Line - 1115
Segment Name
1115-1102 Interconnect
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
Regulator/control Valve
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Relief Valve Activation
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
515
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
16642
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
100
Est Cost Other
0
Gas Cost In Mcf
3.01
Prpty
16742
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
568.7
Gas Flow In Pipe In Mcf
79000
Mop Psig
580
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1994-12-03 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Length Segment Isolated
95040
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
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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
Controller actions were unrelated to the power interruption or relief valve set point.
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 Electricity Ind
Yes
Preparer Name
B** K*******
Preparer Title
Engineer-Pipeline Sr
Preparer Email
B***********@k***********.com
Preparer Telephone
860-806-2988
Local Contact Name
B*** S*****
Local Contact Email
B**********@k***********.com
Local Contact Telephone
575-492-3128
Authorizer Name
C****** P********
Authorizer Title
Manager-Codes And Standards
Authorizer Telephone
713-420-2460
Authorizer Email
C****************@k***********.com
Narrative
At 8:43 am central time a relief valve on the interconnect between epng lines 1115 and 1102 activated at 568.7 psig releasing 5529 mcf of natural gas before reseating at 536 psig. The valve activated below its set pressure of 591 psig. The increase in pressure was caused when the downstream plains compressor station went offline due to a power interruption, which backed up pressure on the suction side. The station was restored to service eliminating the pressure backup, and there was no repeat of the valve activation.
| Report Received Date | 2025-10-24 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250119 |
| Supplemental Number | 41594 |
| 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 |
| Local Datetime | 2025-09-26 08:43:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 32.703798 Google Maps OpenStreetMap |
| Location Longitude | -103.03671 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1443856 NRC Report How to search |
| Nrc Rpt Datetime | 2025-09-26 09:36:00 |
| Additional Nrc Report Numbers | 1444011 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 5529 |
| 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 Reseated And Operation Of Downstream Station Was Restored. |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | None. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Plains Compressor Station Was Restored To Service Ending The Pressure Backup. |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2025-09-26 09:00:00 |
| On Site Datetime | 2025-09-26 09:43:00 |
| Confirmed Discovery Datetime | 2025-09-26 09:43:00 |
| 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 | 55.8 |
| Pipe Fac Name | 1100 Series California System Main Line - 1115 |
| Segment Name | 1115-1102 Interconnect |
| 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 | Regulator/control Valve |
| Installation Year | Unknown |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Relief Valve Activation |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 515 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 16642 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 100 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 3.01 |
| Prpty | 16742 |
| 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 | 568.7 |
| Gas Flow In Pipe In Mcf | 79000 |
| Mop Psig | 580 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1994-12-03 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Length Segment Isolated | 95040 |
| 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 | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| 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 | Controller actions were unrelated to the power interruption or relief valve set point. |
| 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 Electricity Ind | Yes |
| Preparer Name | B** K******* |
| Preparer Title | Engineer-Pipeline Sr |
| Preparer Email | B***********@k***********.com |
| Preparer Telephone | 860-806-2988 |
| Local Contact Name | B*** S***** |
| Local Contact Email | B**********@k***********.com |
| Local Contact Telephone | 575-492-3128 |
| Authorizer Name | C****** P******** |
| Authorizer Title | Manager-Codes And Standards |
| Authorizer Telephone | 713-420-2460 |
| Authorizer Email | C****************@k***********.com |
| Narrative | At 8:43 am central time a relief valve on the interconnect between epng lines 1115 and 1102 activated at 568.7 psig releasing 5529 mcf of natural gas before reseating at 536 psig. The valve activated below its set pressure of 591 psig. The increase in pressure was caused when the downstream plains compressor station went offline due to a power interruption, which backed up pressure on the suction side. The station was restored to service eliminating the pressure backup, and there was no repeat of the valve activation. |
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