Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2025-05-23 — NY
Operator
Keyspan Energy Delivery - Ny City
Cause
Other Incident Cause
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
1 injury
Property damage (nominal)
$0
Incident datetime
2025-05-23 00:00 UTC
Report number
Location
NY
Narrative
(see below for update on supplemental report) national grid had previously performed an inline inspection of a portion of the 30" 350 psi jamaica bay line transmission pipeline in brooklyn, ny, and was preparing to return the pipeline to normal operating status. One of the steps was to insert a completion plug into a 2" thread-o-ring (tor) operating at 310 psig. During this process, a failure from an unknown source occurred, resulting in an unplanned, accidental release of natural gas. A company employee was injured and hospitalized as an inpatient; and a second employee was treated at a hospital. The fitting and materials believed to be involved in this incident will be cut out from the 30" pipeline and tested by a third party lab to help determine the apparent cause. *** supplemental report issued 7/24/2025: the 30" pipeline was shutdown during the weekend of may 31 and the section in question was removed for further examination and analysis. (cause still unknown). A replacement section was installed and the 30" pipeline was gassed back into service on 6/4/2025. No additional costs are associated with the emergency response. The section was cleaned and then sent to an independent metallurgical laboratory on 6/4/2025. Analysis is ongoing. . Entered date/time of restart (section a question 16a and b).
Detailed record list
Report Received Date
2025-05-23 00:00:00
Iyear
2025
Report Number
20250057
Supplemental Number
41178
Report Type
Supplemental
Operator Id
1800
Name
Keyspan Energy Delivery - Ny City
Operator Street Address
2 Hanson Place
Operator City Name
Brooklyn
Operator State Abbreviation
NY
Operator Postal Code
11217
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
40.624038
Location Longitude
-74.034698
Nrc Rpt Num
1429382
Additional Nrc Report Numbers
1429441, 1431759
Commodity Released Type
Natural Gas
Unintentional Release
1403
Intentional Release
840
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
Yes
Num Emp Injuries
1
Num Contr Injuries
0
Num Er Injuries
0
Num Worker Injuries
0
Num Gp Injuries
0
Injure
1
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
32
On Off Shore
Onshore
Onshore State Abbreviation
Ny
Onshore Postal Code
11209
Onshore City Name
Brooklyn
Onshore County Name
Kings
Designated Location
Survey Station No.
Designated Name
C1
Pipe Fac Name
Jamaica Bay Line
Segment Name
4.0.0.0.0.1
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Exposed Due To Excavation
Depth Of Cover
40
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Other
Item Involved Details
Unk. Source. 2" Thread-O-Ring Or Plug
Installation Year
2018
Manufactured Year
2017
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Tbd - Likely, Material Failure Or Incorrect Operation At 2" Thread-O-Ring Or 2" Completion Plug. Note The Plug Is Brass With A Rubber O-Ring.
Class Location Type
Class 4 Location
Could Be Hca
Yes
Determination Method
Method1
Pir Radius
387
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
8474
Est Cost Intentional Release
5074
Est Cost Prop Damage
0
Est Cost Emergency
15000
Est Cost Other
0
Gas Cost In Mcf
6.04
Prpty
28548
Num Persons Hosp Not Ovnght
1
Num Injured Treated By Emt
0
Num Resident Building Affctd
32
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
310
Gas Flow In Pipe In Mcf
6150
Mop Psig
350
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1960-12-02 00:00:00
Maop Reversal Flow Ind
Bi-Directional
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
Yes
Gas Odorized Ind
Yes
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
5600
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission Line Of Distribution System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
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
This incident resulted from conditions in the field, not due to controller actions or control room issues.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Incident Cause
Cause Details
Unknown
Other Type
Unknown
Unknown Subtype
Still Under Investigation, Cause Of Incident To Be Determined* (*supplemental Report Required)
Preparer Name
C****** B*****
Preparer Title
Prin Program Mgr Regulatory Moc
Preparer Email
C*************@n***********.com
Preparer Telephone
5169030596
Local Contact Name
C****** B*****
Local Contact Email
C*************@n***********.com
Local Contact Telephone
5169030596
Authorizer Name
C****** B*****
Authorizer Title
Prin Program Mgr Regulatory Moc
Authorizer Telephone
5169030596
Authorizer Email
C*************@n***********.com
Narrative
(see below for update on supplemental report) national grid had previously performed an inline inspection of a portion of the 30" 350 psi jamaica bay line transmission pipeline in brooklyn, ny, and was preparing to return the pipeline to normal operating status. One of the steps was to insert a completion plug into a 2" thread-o-ring (tor) operating at 310 psig. During this process, a failure from an unknown source occurred, resulting in an unplanned, accidental release of natural gas. A company employee was injured and hospitalized as an inpatient; and a second employee was treated at a hospital. The fitting and materials believed to be involved in this incident will be cut out from the 30" pipeline and tested by a third party lab to help determine the apparent cause. *** supplemental report issued 7/24/2025: the 30" pipeline was shutdown during the weekend of may 31 and the section in question was removed for further examination and analysis. (cause still unknown). A replacement section was installed and the 30" pipeline was gassed back into service on 6/4/2025. No additional costs are associated with the emergency response. The section was cleaned and then sent to an independent metallurgical laboratory on 6/4/2025. Analysis is ongoing. . Entered date/time of restart (section a question 16a and b).
| Report Received Date | 2025-05-23 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250057 |
| Supplemental Number | 41178 |
| Report Type | Supplemental |
| Operator Id | 1800 PHMSA Enforcement |
| Name | Keyspan Energy Delivery - Ny City |
| Operator Street Address | 2 Hanson Place |
| Operator City Name | Brooklyn |
| Operator State Abbreviation | NY |
| Operator Postal Code | 11217 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 40.624038 Google Maps OpenStreetMap |
| Location Longitude | -74.034698 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1429382 NRC Report How to search |
| Additional Nrc Report Numbers | 1429441, 1431759 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1403 |
| Intentional Release | 840 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | Yes |
| Num Emp Injuries | 1 |
| Num Contr Injuries | 0 |
| Num Er Injuries | 0 |
| Num Worker Injuries | 0 |
| Num Gp Injuries | 0 |
| Injure | 1 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Valve Closure |
| Num Pub Evacuated | 32 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ny |
| Onshore Postal Code | 11209 |
| Onshore City Name | Brooklyn |
| Onshore County Name | Kings |
| Designated Location | Survey Station No. |
| Designated Name | C1 |
| Pipe Fac Name | Jamaica Bay Line |
| Segment Name | 4.0.0.0.0.1 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Exposed Due To Excavation |
| Depth Of Cover | 40 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Other |
| Item Involved Details | Unk. Source. 2" Thread-O-Ring Or Plug |
| Installation Year | 2018 |
| Manufactured Year | 2017 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Tbd - Likely, Material Failure Or Incorrect Operation At 2" Thread-O-Ring Or 2" Completion Plug. Note The Plug Is Brass With A Rubber O-Ring. |
| Class Location Type | Class 4 Location |
| Could Be Hca | Yes |
| Determination Method | Method1 |
| Pir Radius | 387 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 8474 |
| Est Cost Intentional Release | 5074 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 15000 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 6.04 |
| Prpty | 28548 |
| Num Persons Hosp Not Ovnght | 1 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 32 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 310 |
| Gas Flow In Pipe In Mcf | 6150 |
| Mop Psig | 350 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1960-12-02 00:00:00 |
| Maop Reversal Flow Ind | Bi-Directional |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | Yes |
| Gas Odorized Ind | Yes |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 5600 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission Line Of Distribution System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| 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 | This incident resulted from conditions in the field, not due to controller actions or control room issues. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Incident Cause |
| Cause Details | Unknown |
| Other Type | Unknown |
| Unknown Subtype | Still Under Investigation, Cause Of Incident To Be Determined* (*supplemental Report Required) |
| Preparer Name | C****** B***** |
| Preparer Title | Prin Program Mgr Regulatory Moc |
| Preparer Email | C*************@n***********.com |
| Preparer Telephone | 5169030596 |
| Local Contact Name | C****** B***** |
| Local Contact Email | C*************@n***********.com |
| Local Contact Telephone | 5169030596 |
| Authorizer Name | C****** B***** |
| Authorizer Title | Prin Program Mgr Regulatory Moc |
| Authorizer Telephone | 5169030596 |
| Authorizer Email | C*************@n***********.com |
| Narrative | (see below for update on supplemental report) national grid had previously performed an inline inspection of a portion of the 30" 350 psi jamaica bay line transmission pipeline in brooklyn, ny, and was preparing to return the pipeline to normal operating status. One of the steps was to insert a completion plug into a 2" thread-o-ring (tor) operating at 310 psig. During this process, a failure from an unknown source occurred, resulting in an unplanned, accidental release of natural gas. A company employee was injured and hospitalized as an inpatient; and a second employee was treated at a hospital. The fitting and materials believed to be involved in this incident will be cut out from the 30" pipeline and tested by a third party lab to help determine the apparent cause. *** supplemental report issued 7/24/2025: the 30" pipeline was shutdown during the weekend of may 31 and the section in question was removed for further examination and analysis. (cause still unknown). A replacement section was installed and the 30" pipeline was gassed back into service on 6/4/2025. No additional costs are associated with the emergency response. The section was cleaned and then sent to an independent metallurgical laboratory on 6/4/2025. Analysis is ongoing. . Entered date/time of restart (section a question 16a and b). |
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