Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2022-08-16 — TX
Operator
Enable Gas Transmission, Llc
Cause
Material Failure Of Pipe Or Weld
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$69,351
Incident datetime
2022-08-16 16:15
Report number
Location
TX
Narrative
A emergency locate request was sent in from summit utilities at approximately (15:45) on august 16, 2022. Our operations technician responded to the scene at (16:15) and discovered a gas reading of 3% lel in the atmosphere....More technicians arrived and began bar hole testing which revealed readings as high as 50% gas. The pipeline (bm-21) is in the vicinity of 2 duplexes and runs under 2 concrete driveways to these duplexes; the suspected leak was under one of these concrete driveways. The decision was made to evacuate the residents of the 2 duplexes as a precaution; this decision was made at approximately 18:40 on august 16, 2022. After evacuating the residents, operations personnel formed a perimeter and monitored gas levels while waiting for equipment to arrive to isolate and blow down the affected pipeline segment. Operations isolated 8,661' of pipe by placing a stopple plug in a stopple fitting located at line plus 540+95 and by closing block valve 43120 at greenbrier town boarder station located at line plus 627+56; the line was blown flat at 22:50 on august 16, 2022. Contractors mobilized to the site on the morning of august 17, 2022....After heavy rain moved out of the area, the contractors began removing both concrete driveways. The pipe was uncovered on the afternoon (august 17th) and a small pinhole leak was discovered in a girth weld. The pipe was cutout and 44' of 0.237: wt, 4.5" dia, x52 grade pipe was installed in its place. The pipe was purged and loaded and then brought back into service on the morning of august 18th, 2022.
Detailed record list
Report Received Date
2022-08-29 00:00:00
Iyear
2022
Report Number
20220092
Supplemental Number
37039
Report Type
Original Final
Operator Id
Name
Enable Gas Transmission, Llc
Operator Street Address
1300 Main Street
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2022-08-16 18:46:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
35.22697
Location Longitude
-92.398986
Nrc Rpt Num
1344682
Nrc Rpt Datetime
2022-08-16 18:53:00
Additional Nrc Report Numbers
1344853
Commodity Released Type
Natural Gas
Unintentional Release
1
Intentional Release
14.6
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
Shutdown Datetime
2022-08-16 22:50:00
Restart Datetime
2022-08-18 11:27:00
Communication State Fed Ind
Yes
Party Initiated Communication
Local/state/federal Emergency Responder
Initial Responder Com Datetime
2022-08-16 07:11:00
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Close Datetime
2022-08-16 22:40:00
Downstream Action Taken
Valve Closure
Downstream Vlv Close Datetime
2022-08-16 22:50:00
Num Pub Evacuated
4
Incident Identified Datetime
2022-08-16 16:15:00
On Site Datetime
2022-08-16 16:15:00
On Off Shore
Onshore
Onshore State Abbreviation
Ar
Onshore Postal Code
72058
Onshore City Name
Greenbrier
Onshore County Name
Faulkner
Designated Location
Not Applicable
Pipe Fac Name
Bm-21
Segment Name
Pipeline
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
36
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
4
Puddle Weld Ind
No
Pipe Wall Thickness
0.188
Pipe Smys
30000
Pipe Specification
Unknown
Pipe Seam Type
Furnace Butt Welded
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
Unknown
Installation Year
1957
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 3 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
55
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
9
Est Cost Intentional Release
135
Est Cost Prop Damage
69351
Est Cost Emergency
0
Est Cost Other
852
Est Cost Other Details
Hotel Stays For Those Evacuated.
Gas Cost In Mcf
9.28
Prpty
70347
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
2
Num Business Building Affctd
1
Wildlife Impact Ind
No
Accident Psig
260
Gas Flow In Pipe In Mcf
3534
Mop Psig
310
Mop Cfr Section
192.619(A)(2)
Maop Established Date
2012-03-30 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
8661
Internal Inspection Ind
No
Unsuitable Mainline Ind
Yes
Other Restrictions Ind
Yes
Other Inspection Ind
Yes
Internal Inspection Details
No Launcher/receiver; Dead Legs Are Present
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
No
Accident Identifier
Other
Accident Details
An Emergency Locate Request Was Submitted By Summit Utilities.
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 leak was very small (pin hole) and not something a controller would be able to identify.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Design-, Construction-, Installation-, Or Fabrication-Related
Pwjf Failure Type
Design-, Construction-, Installation-, Or Fabrication-Related
Field Exam Ind
Yes
Other Factor
Yes
Other Factor Details
Pin Hole In Weld
Pwf Additional Other Ind
Yes
Additional Other Details
Pin Hole In Weld
Post Constr Pressure Test Val
Unknown
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
2018
Hydrtst Most Rcnt Pressure
388
Direct Asmnt Conducted
Yes, But The Point Of The Accident Was Not Identified As A Dig Site
Direct Asmnt Pnt Not Idntf Yr
2020
Asmnt Ecda Rcnt Year
2020
Asmnt Icda Rcnt Year
2020
Asmnt Ecda Rcnt Ind
Yes
Asmnt Icda Rcnt Ind
Yes
Non Destructive Exam Ind
No
Extrnl Cor Galvanic Ind
Yes
Preparer Name
D***** A******
Preparer Title
Sr. Dot Specialist
Preparer Email
D*************@e*************.com
Preparer Telephone
501-472-5065
Local Contact Name
B****** B***
Local Contact Email
B***********@e*************.com
Local Contact Telephone
870-769-2435
Authorizer Name
J**** C****
Authorizer Title
Sr. Manager Regulatory Compliance
Authorizer Telephone
318-426-2515
Authorizer Email
J**********@e*************.com
Narrative
A emergency locate request was sent in from summit utilities at approximately (15:45) on august 16, 2022. Our operations technician responded to the scene at (16:15) and discovered a gas reading of 3% lel in the atmosphere....More technicians arrived and began bar hole testing which revealed readings as high as 50% gas. The pipeline (bm-21) is in the vicinity of 2 duplexes and runs under 2 concrete driveways to these duplexes; the suspected leak was under one of these concrete driveways. The decision was made to evacuate the residents of the 2 duplexes as a precaution; this decision was made at approximately 18:40 on august 16, 2022. After evacuating the residents, operations personnel formed a perimeter and monitored gas levels while waiting for equipment to arrive to isolate and blow down the affected pipeline segment. Operations isolated 8,661' of pipe by placing a stopple plug in a stopple fitting located at line plus 540+95 and by closing block valve 43120 at greenbrier town boarder station located at line plus 627+56; the line was blown flat at 22:50 on august 16, 2022. Contractors mobilized to the site on the morning of august 17, 2022....After heavy rain moved out of the area, the contractors began removing both concrete driveways. The pipe was uncovered on the afternoon (august 17th) and a small pinhole leak was discovered in a girth weld. The pipe was cutout and 44' of 0.237: wt, 4.5" dia, x52 grade pipe was installed in its place. The pipe was purged and loaded and then brought back into service on the morning of august 18th, 2022.
| Report Received Date | 2022-08-29 00:00:00 |
|---|---|
| Iyear | 2022 |
| Report Number | 20220092 |
| Supplemental Number | 37039 |
| Report Type | Original Final |
| Operator Id | 602 PHMSA Enforcement |
| Name | Enable Gas Transmission, Llc |
| Operator Street Address | 1300 Main Street |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2022-08-16 18:46:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 35.22697 Google Maps OpenStreetMap |
| Location Longitude | -92.398986 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1344682 NRC Report How to search |
| Nrc Rpt Datetime | 2022-08-16 18:53:00 |
| Additional Nrc Report Numbers | 1344853 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1 |
| Intentional Release | 14.6 |
| 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 |
| Shutdown Datetime | 2022-08-16 22:50:00 |
| Restart Datetime | 2022-08-18 11:27:00 |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Local/state/federal Emergency Responder |
| Initial Responder Com Datetime | 2022-08-16 07:11:00 |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Close Datetime | 2022-08-16 22:40:00 |
| Downstream Action Taken | Valve Closure |
| Downstream Vlv Close Datetime | 2022-08-16 22:50:00 |
| Num Pub Evacuated | 4 |
| Incident Identified Datetime | 2022-08-16 16:15:00 |
| On Site Datetime | 2022-08-16 16:15:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ar |
| Onshore Postal Code | 72058 |
| Onshore City Name | Greenbrier |
| Onshore County Name | Faulkner |
| Designated Location | Not Applicable |
| Pipe Fac Name | Bm-21 |
| Segment Name | Pipeline |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 36 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 4 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.188 |
| Pipe Smys | 30000 |
| Pipe Specification | Unknown |
| Pipe Seam Type | Furnace Butt Welded |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Unknown |
| Installation Year | 1957 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 3 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 55 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 9 |
| Est Cost Intentional Release | 135 |
| Est Cost Prop Damage | 69351 |
| Est Cost Emergency | 0 |
| Est Cost Other | 852 |
| Est Cost Other Details | Hotel Stays For Those Evacuated. |
| Gas Cost In Mcf | 9.28 |
| Prpty | 70347 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 2 |
| Num Business Building Affctd | 1 |
| Wildlife Impact Ind | No |
| Accident Psig | 260 |
| Gas Flow In Pipe In Mcf | 3534 |
| Mop Psig | 310 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 2012-03-30 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 | 8661 |
| Internal Inspection Ind | No |
| Unsuitable Mainline Ind | Yes |
| Other Restrictions Ind | Yes |
| Other Inspection Ind | Yes |
| Internal Inspection Details | No Launcher/receiver; Dead Legs Are Present |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | No |
| Accident Identifier | Other |
| Accident Details | An Emergency Locate Request Was Submitted By Summit Utilities. |
| 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 leak was very small (pin hole) and not something a controller would be able to identify. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Design-, Construction-, Installation-, Or Fabrication-Related |
| Pwjf Failure Type | Design-, Construction-, Installation-, Or Fabrication-Related |
| Field Exam Ind | Yes |
| Other Factor | Yes |
| Other Factor Details | Pin Hole In Weld |
| Pwf Additional Other Ind | Yes |
| Additional Other Details | Pin Hole In Weld |
| Post Constr Pressure Test Val | Unknown |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 2018 |
| Hydrtst Most Rcnt Pressure | 388 |
| Direct Asmnt Conducted | Yes, But The Point Of The Accident Was Not Identified As A Dig Site |
| Direct Asmnt Pnt Not Idntf Yr | 2020 |
| Asmnt Ecda Rcnt Year | 2020 |
| Asmnt Icda Rcnt Year | 2020 |
| Asmnt Ecda Rcnt Ind | Yes |
| Asmnt Icda Rcnt Ind | Yes |
| Non Destructive Exam Ind | No |
| Extrnl Cor Galvanic Ind | Yes |
| Preparer Name | D***** A****** |
| Preparer Title | Sr. Dot Specialist |
| Preparer Email | D*************@e*************.com |
| Preparer Telephone | 501-472-5065 |
| Local Contact Name | B****** B*** |
| Local Contact Email | B***********@e*************.com |
| Local Contact Telephone | 870-769-2435 |
| Authorizer Name | J**** C**** |
| Authorizer Title | Sr. Manager Regulatory Compliance |
| Authorizer Telephone | 318-426-2515 |
| Authorizer Email | J**********@e*************.com |
| Narrative | A emergency locate request was sent in from summit utilities at approximately (15:45) on august 16, 2022. Our operations technician responded to the scene at (16:15) and discovered a gas reading of 3% lel in the atmosphere....More technicians arrived and began bar hole testing which revealed readings as high as 50% gas. The pipeline (bm-21) is in the vicinity of 2 duplexes and runs under 2 concrete driveways to these duplexes; the suspected leak was under one of these concrete driveways. The decision was made to evacuate the residents of the 2 duplexes as a precaution; this decision was made at approximately 18:40 on august 16, 2022. After evacuating the residents, operations personnel formed a perimeter and monitored gas levels while waiting for equipment to arrive to isolate and blow down the affected pipeline segment. Operations isolated 8,661' of pipe by placing a stopple plug in a stopple fitting located at line plus 540+95 and by closing block valve 43120 at greenbrier town boarder station located at line plus 627+56; the line was blown flat at 22:50 on august 16, 2022. Contractors mobilized to the site on the morning of august 17, 2022....After heavy rain moved out of the area, the contractors began removing both concrete driveways. The pipe was uncovered on the afternoon (august 17th) and a small pinhole leak was discovered in a girth weld. The pipe was cutout and 44' of 0.237: wt, 4.5" dia, x52 grade pipe was installed in its place. The pipe was purged and loaded and then brought back into service on the morning of august 18th, 2022. |
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