Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-10-04 — TX
Operator
Northwest Pipeline Llc
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2024-10-04 00:00 UTC
Report number
Location
TX
Narrative
On august 18th at approximately 17:00 cst gas control was remote starting unit 1 at the goldendale compressor station. At 17:03 an a/c power failure alarm was received and the unit shutdown on low pressure. At 17:21 an alarm for unexpected gas venting was received. Local operations was notified. Due to response time gas control worked to remotely reduce pressure. When that was unsuccessful station was remotely isolated and the release was stopped by 18:15. Initial estimate of volume released was 10 mscfd, which was below the reporting threshold. When rechecking the calculation for environmental reporting and the volume release estimated at 6,000 mscfd. This resulted in the need to report. Failure to report was due to internal miscommunication of volume. Company investigation is on going and a supplemental report will be submitted once the investigation is complete.
Detailed record list
Report Received Date
2024-10-04 00:00:00
Iyear
2024
Report Number
20240115
Supplemental Number
40071
Report Type
Original
Operator Id
13845
Name
Northwest Pipeline Llc
Operator Street Address
2800 Post Oak Blvd
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77056
Time Zone
Pacific
Daylight Savings Ind
Yes
Location Latitude
45.771312
Location Longitude
-120.79931
Nrc Rpt Num
1410114
Additional Nrc Report Numbers
1410154
Commodity Released Type
Natural Gas
Unintentional Release
6114.82
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Routine Start-Up
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Wa
Onshore Postal Code
98620
Onshore City Name
Goldendale
Onshore County Name
Klickitat
Designated Location
Not Applicable
Pipe Fac Name
Goldendale Compressor Station
Segment Name
1400
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 Compressor Station Equipment And Piping
Item Involved
Compressor
Installation Year
1992
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Release From Vent Valve
Class Location Type
Class 3 Location
Could Be Hca
No
Pir Radius
554
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
9906
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
1.62
Prpty
9906
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
555
Gas Flow In Pipe In Mcf
0
Mop Psig
809
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1973-08-16 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
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
Investigation Status
Yes, but the investigation of the control room and/or controller actions has not yet been completed by the operator (supplemental report required)
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
Power Failure Ind
Yes
Additional Electricity Ind
Yes
Preparer Name
C********** E*****
Preparer Title
Senior Engineer
Preparer Email
C***********@w*******.com
Preparer Telephone
570-406-0743
Authorizer Name
E*** W****
Authorizer Title
Manager Pipeline Safety
Authorizer Telephone
281-536-9504
Authorizer Email
E*********@w*******.com
Narrative
On august 18th at approximately 17:00 cst gas control was remote starting unit 1 at the goldendale compressor station. At 17:03 an a/c power failure alarm was received and the unit shutdown on low pressure. At 17:21 an alarm for unexpected gas venting was received. Local operations was notified. Due to response time gas control worked to remotely reduce pressure. When that was unsuccessful station was remotely isolated and the release was stopped by 18:15. Initial estimate of volume released was 10 mscfd, which was below the reporting threshold. When rechecking the calculation for environmental reporting and the volume release estimated at 6,000 mscfd. This resulted in the need to report. Failure to report was due to internal miscommunication of volume. Company investigation is on going and a supplemental report will be submitted once the investigation is complete.
Report Received Date | 2024-10-04 00:00:00 |
---|---|
Iyear | 2024 |
Report Number | 20240115 |
Supplemental Number | 40071 |
Report Type | Original |
Operator Id | 13845 PHMSA Enforcement |
Name | Northwest Pipeline Llc |
Operator Street Address | 2800 Post Oak Blvd |
Operator City Name | Houston |
Operator State Abbreviation | TX |
Operator Postal Code | 77056 |
Time Zone | Pacific |
Daylight Savings Ind | Yes |
Location Latitude | 45.771312 Google Maps OpenStreetMap |
Location Longitude | -120.79931 Google Maps OpenStreetMap |
Nrc Rpt Num | 1410114 NRC Report How to search |
Additional Nrc Report Numbers | 1410154 |
Commodity Released Type | Natural Gas |
Unintentional Release | 6114.82 |
Intentional Release | 0 |
Accompanying Liquid | 0 |
Fatality Ind | No |
Fatal | 0 |
Injury Ind | No |
Injure | 0 |
Status When Identified | Routine Start-Up |
Shutdown Due Accident Ind | Yes |
Communication State Fed Ind | No |
Ignite Ind | No |
Num Pub Evacuated | 0 |
On Off Shore | Onshore |
Onshore State Abbreviation | Wa |
Onshore Postal Code | 98620 |
Onshore City Name | Goldendale |
Onshore County Name | Klickitat |
Designated Location | Not Applicable |
Pipe Fac Name | Goldendale Compressor Station |
Segment Name | 1400 |
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 Compressor Station Equipment And Piping |
Item Involved | Compressor |
Installation Year | 1992 |
Manufactured Year | Unknown |
Material Involved | Carbon Steel |
Release Type | Other |
Release Type Details | Release From Vent Valve |
Class Location Type | Class 3 Location |
Could Be Hca | No |
Pir Radius | 554 |
Heat Damage Ind | No |
Non Heat Damage Ind | No |
Did Occur In Mca Ind | No |
Est Cost Oper Paid | 0 |
Est Cost Unintentional Release | 9906 |
Est Cost Intentional Release | 0 |
Est Cost Prop Damage | 0 |
Est Cost Emergency | 0 |
Est Cost Other | 0 |
Gas Cost In Mcf | 1.62 |
Prpty | 9906 |
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 | 555 |
Gas Flow In Pipe In Mcf | 0 |
Mop Psig | 809 |
Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
Maop Established Date | 1973-08-16 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 | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
Investigation Status | Yes, but the investigation of the control room and/or controller actions has not yet been completed by the operator (supplemental report required) |
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 |
Power Failure Ind | Yes |
Additional Electricity Ind | Yes |
Preparer Name | C********** E***** |
Preparer Title | Senior Engineer |
Preparer Email | C***********@w*******.com |
Preparer Telephone | 570-406-0743 |
Authorizer Name | E*** W**** |
Authorizer Title | Manager Pipeline Safety |
Authorizer Telephone | 281-536-9504 |
Authorizer Email | E*********@w*******.com |
Narrative | On august 18th at approximately 17:00 cst gas control was remote starting unit 1 at the goldendale compressor station. At 17:03 an a/c power failure alarm was received and the unit shutdown on low pressure. At 17:21 an alarm for unexpected gas venting was received. Local operations was notified. Due to response time gas control worked to remotely reduce pressure. When that was unsuccessful station was remotely isolated and the release was stopped by 18:15. Initial estimate of volume released was 10 mscfd, which was below the reporting threshold. When rechecking the calculation for environmental reporting and the volume release estimated at 6,000 mscfd. This resulted in the need to report. Failure to report was due to internal miscommunication of volume. Company investigation is on going and a supplemental report will be submitted once the investigation is complete. |
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