Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-09-16 — TX
Operator
East Tennessee Natural Gas, Llc
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$155,000
Incident datetime
2024-09-16 00:00 UTC
Report number
Location
TX
Narrative
On august 30, 2024, at 10:49 a.M. Ct gas control was notified by the local gas distribution company that there had been a line strike, with gas blowing, near their meter station and police and fire were on their way. Gas control did not have any indication of a pressure loss on the line. A crew was immediately dispatched to determine if the potential line strike it was on an east tennessee natural gas (etng) system. Out of an abundance of caution, the decision was made to isolate the line segment prior to confirming. At 11:38 a.M., the valve section was isolated, and a blowdown of the line section began shortly thereafter. An excavator was installing light pole foundations around a ball field when it struck a 22-inch, 720 psig maop line with an auger. The contractor doing the work did not have a valid one-call excavation notice for conducting the excavation.
Detailed record list
Report Received Date
2024-09-16 00:00:00
Iyear
2024
Report Number
20240108
Supplemental Number
40004
Report Type
Original Final
Operator Id
4070
Name
East Tennessee Natural Gas, Llc
Operator Street Address
915 North Eldridge Parkway
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
36.41124689
Location Longitude
-86.42653812
Nrc Rpt Num
1409488
Additional Nrc Report Numbers
1409632
Commodity Released Type
Natural Gas
Unintentional Release
1098
Intentional Release
5307
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
Yes
Party Initiated Communication
Local/state/federal Emergency Responder
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
30
On Off Shore
Onshore
Onshore State Abbreviation
Tn
Onshore Postal Code
37066
Onshore City Name
Gallatin
Onshore County Name
Sumner
Designated Location
Milepost
Designated Name
4.718
Pipe Fac Name
East Tennesse Natural Gas
Segment Name
Ridg-Dixo/3100-1 Vs-04
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
69
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
22
Puddle Weld Ind
No
Pipe Wall Thickness
0.312
Pipe Smys
52000
Pipe Specification
Api-5l
Pipe Seam Type
Longitudinal Erw - High Frequency
Pipe Manufacturer
Mitsui
Pipe Coating Type
Epoxy
Coating Applied Ind
No
Installation Year
1988
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Gouge From Auger.
Class Location Type
Class 3 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
408
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
2339
Est Cost Intentional Release
11304
Est Cost Prop Damage
155000
Est Cost Emergency
20000
Est Cost Other
7500
Est Cost Other Details
Security
Gas Cost In Mcf
2.13
Prpty
196143
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
1
Wildlife Impact Ind
No
Accident Psig
565
Gas Flow In Pipe In Mcf
104013
Mop Psig
720
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1988-09-22 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
52377
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
No
Scada Conf Ind
No
Accident Identifier
Other
Accident Details
Local Gas Utility Representative
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 caused by the damage was not of a size that could be identified through scada.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Excavation Damage
Cause Details
Excavation Damage By Third Party
Ex Party Type
Excavation Damage By Third Party
Prior Notification Ind
No
State Law Exempt Ind
No
Notify Cga Dirt
Yes
Public Row Ind
Yes
Public Subtype
Other
Pipeline Easement Row Ind
Yes
Joint Trench Ind
No
Cross Bore Ind
No
Depth Of Grade
Measured Depth From Grade
Depth Of Grade Detail
69
Excavator Type
Contractor
Excavator Equipment
Auger
Work Performed
Pole
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
No
Service Interruption
Yes
Service Interruption Hours
48
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
M****** J**** M******
Preparer Email
M**************@e*******.com
Preparer Telephone
(612)805-6542
Authorizer Name
S***** A******
Authorizer Title
Manager Operational Compliance
Authorizer Telephone
(936)433-3303
Authorizer Email
S*************@e*******.com
Narrative
On august 30, 2024, at 10:49 a.M. Ct gas control was notified by the local gas distribution company that there had been a line strike, with gas blowing, near their meter station and police and fire were on their way. Gas control did not have any indication of a pressure loss on the line. A crew was immediately dispatched to determine if the potential line strike it was on an east tennessee natural gas (etng) system. Out of an abundance of caution, the decision was made to isolate the line segment prior to confirming. At 11:38 a.M., the valve section was isolated, and a blowdown of the line section began shortly thereafter. An excavator was installing light pole foundations around a ball field when it struck a 22-inch, 720 psig maop line with an auger. The contractor doing the work did not have a valid one-call excavation notice for conducting the excavation.
| Report Received Date | 2024-09-16 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240108 |
| Supplemental Number | 40004 |
| Report Type | Original Final |
| Operator Id | 4070 PHMSA Enforcement |
| Name | East Tennessee Natural Gas, Llc |
| Operator Street Address | 915 North Eldridge Parkway |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 36.41124689 Google Maps OpenStreetMap |
| Location Longitude | -86.42653812 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1409488 NRC Report How to search |
| Additional Nrc Report Numbers | 1409632 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1098 |
| Intentional Release | 5307 |
| 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 | Yes |
| Party Initiated Communication | Local/state/federal Emergency Responder |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Valve Closure |
| Num Pub Evacuated | 30 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tn |
| Onshore Postal Code | 37066 |
| Onshore City Name | Gallatin |
| Onshore County Name | Sumner |
| Designated Location | Milepost |
| Designated Name | 4.718 |
| Pipe Fac Name | East Tennesse Natural Gas |
| Segment Name | Ridg-Dixo/3100-1 Vs-04 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 69 |
| 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 | 22 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.312 |
| Pipe Smys | 52000 |
| Pipe Specification | Api-5l |
| Pipe Seam Type | Longitudinal Erw - High Frequency |
| Pipe Manufacturer | Mitsui |
| Pipe Coating Type | Epoxy |
| Coating Applied Ind | No |
| Installation Year | 1988 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Gouge From Auger. |
| Class Location Type | Class 3 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 408 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 2339 |
| Est Cost Intentional Release | 11304 |
| Est Cost Prop Damage | 155000 |
| Est Cost Emergency | 20000 |
| Est Cost Other | 7500 |
| Est Cost Other Details | Security |
| Gas Cost In Mcf | 2.13 |
| Prpty | 196143 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 1 |
| Wildlife Impact Ind | No |
| Accident Psig | 565 |
| Gas Flow In Pipe In Mcf | 104013 |
| Mop Psig | 720 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1988-09-22 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 52377 |
| 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 | No |
| Scada Conf Ind | No |
| Accident Identifier | Other |
| Accident Details | Local Gas Utility Representative |
| 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 caused by the damage was not of a size that could be identified through scada. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Excavation Damage |
| Cause Details | Excavation Damage By Third Party |
| Ex Party Type | Excavation Damage By Third Party |
| Prior Notification Ind | No |
| State Law Exempt Ind | No |
| Notify Cga Dirt | Yes |
| Public Row Ind | Yes |
| Public Subtype | Other |
| Pipeline Easement Row Ind | Yes |
| Joint Trench Ind | No |
| Cross Bore Ind | No |
| Depth Of Grade | Measured Depth From Grade |
| Depth Of Grade Detail | 69 |
| Excavator Type | Contractor |
| Excavator Equipment | Auger |
| Work Performed | Pole |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | No |
| Service Interruption | Yes |
| Service Interruption Hours | 48 |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | M****** J**** M****** |
| Preparer Email | M**************@e*******.com |
| Preparer Telephone | (612)805-6542 |
| Authorizer Name | S***** A****** |
| Authorizer Title | Manager Operational Compliance |
| Authorizer Telephone | (936)433-3303 |
| Authorizer Email | S*************@e*******.com |
| Narrative | On august 30, 2024, at 10:49 a.M. Ct gas control was notified by the local gas distribution company that there had been a line strike, with gas blowing, near their meter station and police and fire were on their way. Gas control did not have any indication of a pressure loss on the line. A crew was immediately dispatched to determine if the potential line strike it was on an east tennessee natural gas (etng) system. Out of an abundance of caution, the decision was made to isolate the line segment prior to confirming. At 11:38 a.M., the valve section was isolated, and a blowdown of the line section began shortly thereafter. An excavator was installing light pole foundations around a ball field when it struck a 22-inch, 720 psig maop line with an auger. The contractor doing the work did not have a valid one-call excavation notice for conducting the excavation. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA