GTG incident on 2024-08-02 — KY

Operator
Southern Star Central Gas Pipeline, Inc
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities 0 injuries
Property damage (nominal)
$1,200
Incident datetime
2024-08-02 00:00 UTC
Report number
Location
KY
Narrative
On 7/5/2025 southern star central gas pipeline (sscgp) gas control was called at 3:40 am cdt about a possible gas leak and noticed a rapid pressure loss and flow changes at the saginaw compressor station. After initial review of the pressure drop it was determined at 4:07 am that the gas loss would be over the reportable threshold and the nrc was notified at 4:22 am. At 4:13 am, the on-site operator personnel determined it was a pressure relief valve (prv) activation that was the source of the pressure drop and shut in the prv at 4:14 am, no actual maop exceedance occurred. It was determined that the prv malfunction was due to a loose blowdown ring. The prv was repaired, tested and recertified with a set point of 715 psig and placed back in service on 7/5/2024 at 6:40 pm cdt.
Detailed record list
Report Received Date
2024-08-02 00:00:00
Iyear
2024
Report Number
20240098
Supplemental Number
39859
Report Type
Original Final
Operator Id
Name
Southern Star Central Gas Pipeline, Inc
Operator Street Address
4700 State Route 56; Box 20010
Operator City Name
Owensboro
Operator State Abbreviation
KY
Operator Postal Code
42301
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
Location Longitude
Nrc Rpt Num
Additional Nrc Report Numbers
1403934
Commodity Released Type
Natural Gas
Unintentional Release
11800
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
Yes
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Mo
Onshore Postal Code
64804
Onshore City Name
Joplin
Onshore County Name
Newton
Designated Location
Not Applicable
Pipe Fac Name
Saginaw Compressor Station
Segment Name
132-04-001
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Regulator/metering Station Equipment And Piping
Item Involved
Regulator/control Valve
Installation Year
2018
Manufactured Year
2018
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Pressure Relief Valve Release
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
185
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
Yes
Mca Buildng Human Occupy Ind
Yes
Mca Paved Surface Freeway Ind
Yes
Est Cost Oper Paid
0
Est Cost Unintentional Release
23246
Est Cost Intentional Release
0
Est Cost Prop Damage
1200
Est Cost Emergency
5400
Est Cost Other
0
Gas Cost In Mcf
1.97
Prpty
29846
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
707
Gas Flow In Pipe In Mcf
5000
Mop Psig
718
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1989-02-15 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized 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 Public
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
Operational parameters were within limits and pipeline operations in this area were steady, no change had occurred to cause the event.
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
Eq Additional Other Ind
Yes
Eq Additional Other Details
Loose Blow Down Ring Nut
Preparer Name
E*** G****
Preparer Title
Phmsa Compliance Engineer
Preparer Email
E*********@s***********.com
Preparer Telephone
2702810561
Preparer Fax
2708525016
Local Contact Name
C**** T*****
Local Contact Email
C***********@s***********.com
Local Contact Telephone
2703138424
Authorizer Name
C****** C****
Authorizer Title
Vp Chief Operations Officer
Authorizer Telephone
2708524626
Authorizer Email
C************@s***********.com
Narrative
On 7/5/2025 southern star central gas pipeline (sscgp) gas control was called at 3:40 am cdt about a possible gas leak and noticed a rapid pressure loss and flow changes at the saginaw compressor station. After initial review of the pressure drop it was determined at 4:07 am that the gas loss would be over the reportable threshold and the nrc was notified at 4:22 am. At 4:13 am, the on-site operator personnel determined it was a pressure relief valve (prv) activation that was the source of the pressure drop and shut in the prv at 4:14 am, no actual maop exceedance occurred. It was determined that the prv malfunction was due to a loose blowdown ring. The prv was repaired, tested and recertified with a set point of 715 psig and placed back in service on 7/5/2024 at 6:40 pm cdt.
Report Received Date 2024-08-02 00:00:00
Iyear 2024
Report Number 20240098
Supplemental Number 39859
Report Type Original Final
Operator Id 31711 PHMSA Enforcement
Name Southern Star Central Gas Pipeline, Inc
Operator Street Address 4700 State Route 56; Box 20010
Operator City Name Owensboro
Operator State Abbreviation KY
Operator Postal Code 42301
Time Zone Central
Daylight Savings Ind Yes
Location Latitude 37.015969 Google Maps OpenStreetMap
Location Longitude -94.479926 Google Maps OpenStreetMap
Nrc Rpt Num 1403815 NRC Report How to search
Additional Nrc Report Numbers 1403934
Commodity Released Type Natural Gas
Unintentional Release 11800
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 Yes
Communication State Fed Ind No
Ignite Ind No
Num Pub Evacuated 0
On Off Shore Onshore
Onshore State Abbreviation Mo
Onshore Postal Code 64804
Onshore City Name Joplin
Onshore County Name Newton
Designated Location Not Applicable
Pipe Fac Name Saginaw Compressor Station
Segment Name 132-04-001
Federal No
Location Type Operator-Controlled Property
Incident Area Type Aboveground
Incident Area Subtype Typical Aboveground Facility Piping Or Appurtenance
Crossing No
Pipe Facility Type Interstate
System Part Involved Onshore Regulator/metering Station Equipment And Piping
Item Involved Regulator/control Valve
Installation Year 2018
Manufactured Year 2018
Material Involved Carbon Steel
Release Type Other
Release Type Details Pressure Relief Valve Release
Class Location Type Class 1 Location
Could Be Hca No
Pir Radius 185
Heat Damage Ind No
Non Heat Damage Ind No
Did Occur In Mca Ind Yes
Mca Buildng Human Occupy Ind Yes
Mca Paved Surface Freeway Ind Yes
Est Cost Oper Paid 0
Est Cost Unintentional Release 23246
Est Cost Intentional Release 0
Est Cost Prop Damage 1200
Est Cost Emergency 5400
Est Cost Other 0
Gas Cost In Mcf 1.97
Prpty 29846
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 707
Gas Flow In Pipe In Mcf 5000
Mop Psig 718
Mop Cfr Section 192.619(A)(2) View CFR 49 §192
Maop Established Date 1989-02-15 00:00:00
Maop Reversal Flow Ind No
Accident Pressure Pressure Did Not Exceed Maop
Pressure Restriction Ind No
Gas Required Odorized 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 Public
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 Operational parameters were within limits and pipeline operations in this area were steady, no change had occurred to cause the event.
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
Eq Additional Other Ind Yes
Eq Additional Other Details Loose Blow Down Ring Nut
Preparer Name E*** G****
Preparer Title Phmsa Compliance Engineer
Preparer Email E*********@s***********.com
Preparer Telephone 2702810561
Preparer Fax 2708525016
Local Contact Name C**** T*****
Local Contact Email C***********@s***********.com
Local Contact Telephone 2703138424
Authorizer Name C****** C****
Authorizer Title Vp Chief Operations Officer
Authorizer Telephone 2708524626
Authorizer Email C************@s***********.com
Narrative On 7/5/2025 southern star central gas pipeline (sscgp) gas control was called at 3:40 am cdt about a possible gas leak and noticed a rapid pressure loss and flow changes at the saginaw compressor station. After initial review of the pressure drop it was determined at 4:07 am that the gas loss would be over the reportable threshold and the nrc was notified at 4:22 am. At 4:13 am, the on-site operator personnel determined it was a pressure relief valve (prv) activation that was the source of the pressure drop and shut in the prv at 4:14 am, no actual maop exceedance occurred. It was determined that the prv malfunction was due to a loose blowdown ring. The prv was repaired, tested and recertified with a set point of 715 psig and placed back in service on 7/5/2024 at 6:40 pm cdt.

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