Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-06-06 — TX
Operator
Enable Gas Transmission, Llc
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$95,055
Incident datetime
2024-06-06 00:00 UTC
Report number
Location
TX
Narrative
On thursday, may 9th at approximately 1:25pm central time, emmet operations received a call from a third party about a possible line strike with a gas release. At 1:38pm, operations personnel confirmed that a third party had struck line sm-23 with a bulldozer causing a gas release. No one was injured and the gas did not ignite. An operations technician remained on site to monitor the release while one technician went to the upstream valve site and another technician mobilized to the downstream valve site. Pressure at the time of the strike was 550psig; pressure was lowered to 350psig and monitored. The decision to monitor pressure was made to avoid significant outages to residential customers. Once customer notifications were finalized, the pipeline was shunt in and blown down. A type b sleeve was installed over the defect and the pipeline was purged and returned to service on friday may 10th at approximately 4:40pm central time. The pipeline was struck by a third party logging company. The contractors working for the logging company did not complete a one call and were not authorized to perform work on the sm-23 right of way.
Detailed record list
Report Received Date
2024-06-06 00:00:00
Iyear
2024
Report Number
20240079
Supplemental Number
39651
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
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
33.49613
Location Longitude
-92.91935
Nrc Rpt Num
1398499
Additional Nrc Report Numbers
1398644
Commodity Released Type
Natural Gas
Unintentional Release
13000
Intentional Release
1758
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
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Ar
Onshore Postal Code
71701
Onshore City Name
Not Within A Municipality
Onshore County Name
Ouachita
Designated Location
Not Applicable
Pipe Fac Name
Sm-23
Segment Name
Sm-23
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
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
20
Puddle Weld Ind
No
Pipe Wall Thickness
0.25
Pipe Smys
46000
Pipe Specification
Api 5l
Pipe Seam Type
Longitudinal Erw - Unknown Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
No
Installation Year
1967
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
3.6
Puncture Circum
1.2
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
390
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
26390
Est Cost Intentional Release
3569
Est Cost Prop Damage
95055
Est Cost Emergency
20353
Est Cost Other
0
Gas Cost In Mcf
2.03
Prpty
145367
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
550
Gas Flow In Pipe In Mcf
10
Mop Psig
800
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1967-01-01 00:00:00
Maop Reversal Flow Ind
No
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
32736
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
No
Accident Identifier
Notification From Third Party That Caused The Incident
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
No scada on this particular pipeline segment. Incident was called in by third party.
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
Pipeline Easement Row Ind
Yes
Joint Trench Ind
No
Cross Bore Ind
No
Depth Of Grade
18� � 36�
Excavator Type
Contractor
Excavator Equipment
Bulldozer
Work Performed
Grading
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
No
Service Interruption
Yes
Service Interruption Hours
24
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
D***** A******
Preparer Title
Sr. Dot Specialist
Preparer Email
D*************@e*************.com
Preparer Telephone
501-351-8513
Local Contact Name
M*** G*****
Local Contact Email
M*************@e*************.com
Local Contact Telephone
870-703-0482
Authorizer Name
S**** S*****
Authorizer Title
Director Regulatory Compliance
Authorizer Telephone
405-557-5271
Authorizer Email
S***********@e*************.com
Narrative
On thursday, may 9th at approximately 1:25pm central time, emmet operations received a call from a third party about a possible line strike with a gas release. At 1:38pm, operations personnel confirmed that a third party had struck line sm-23 with a bulldozer causing a gas release. No one was injured and the gas did not ignite. An operations technician remained on site to monitor the release while one technician went to the upstream valve site and another technician mobilized to the downstream valve site. Pressure at the time of the strike was 550psig; pressure was lowered to 350psig and monitored. The decision to monitor pressure was made to avoid significant outages to residential customers. Once customer notifications were finalized, the pipeline was shunt in and blown down. A type b sleeve was installed over the defect and the pipeline was purged and returned to service on friday may 10th at approximately 4:40pm central time. The pipeline was struck by a third party logging company. The contractors working for the logging company did not complete a one call and were not authorized to perform work on the sm-23 right of way.
| Report Received Date | 2024-06-06 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240079 |
| Supplemental Number | 39651 |
| 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 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 33.49613 Google Maps OpenStreetMap |
| Location Longitude | -92.91935 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1398499 NRC Report How to search |
| Additional Nrc Report Numbers | 1398644 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 13000 |
| Intentional Release | 1758 |
| 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 |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Valve Closure |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ar |
| Onshore Postal Code | 71701 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Ouachita |
| Designated Location | Not Applicable |
| Pipe Fac Name | Sm-23 |
| Segment Name | Sm-23 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| 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 | 20 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 46000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Longitudinal Erw - Unknown Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | No |
| Installation Year | 1967 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Puncture Axial | 3.6 |
| Puncture Circum | 1.2 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 390 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 26390 |
| Est Cost Intentional Release | 3569 |
| Est Cost Prop Damage | 95055 |
| Est Cost Emergency | 20353 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.03 |
| Prpty | 145367 |
| 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 | 550 |
| Gas Flow In Pipe In Mcf | 10 |
| Mop Psig | 800 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1967-01-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| 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 | 32736 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Third Party That Caused The Incident |
| 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 | No scada on this particular pipeline segment. Incident was called in by third party. |
| 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 |
| Pipeline Easement Row Ind | Yes |
| Joint Trench Ind | No |
| Cross Bore Ind | No |
| Depth Of Grade | 18� � 36� |
| Excavator Type | Contractor |
| Excavator Equipment | Bulldozer |
| Work Performed | Grading |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | No |
| Service Interruption | Yes |
| Service Interruption Hours | 24 |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | D***** A****** |
| Preparer Title | Sr. Dot Specialist |
| Preparer Email | D*************@e*************.com |
| Preparer Telephone | 501-351-8513 |
| Local Contact Name | M*** G***** |
| Local Contact Email | M*************@e*************.com |
| Local Contact Telephone | 870-703-0482 |
| Authorizer Name | S**** S***** |
| Authorizer Title | Director Regulatory Compliance |
| Authorizer Telephone | 405-557-5271 |
| Authorizer Email | S***********@e*************.com |
| Narrative | On thursday, may 9th at approximately 1:25pm central time, emmet operations received a call from a third party about a possible line strike with a gas release. At 1:38pm, operations personnel confirmed that a third party had struck line sm-23 with a bulldozer causing a gas release. No one was injured and the gas did not ignite. An operations technician remained on site to monitor the release while one technician went to the upstream valve site and another technician mobilized to the downstream valve site. Pressure at the time of the strike was 550psig; pressure was lowered to 350psig and monitored. The decision to monitor pressure was made to avoid significant outages to residential customers. Once customer notifications were finalized, the pipeline was shunt in and blown down. A type b sleeve was installed over the defect and the pipeline was purged and returned to service on friday may 10th at approximately 4:40pm central time. The pipeline was struck by a third party logging company. The contractors working for the logging company did not complete a one call and were not authorized to perform work on the sm-23 right of way. |
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