Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-11-27 — OH
Operator
Enbridge Gas Ohio
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$569,000
Incident datetime
2024-11-27 00:00 UTC
Report number
Location
OH
Narrative
A transmission line leak was identified in ego's gas storage system (group 8) at approximately 16:15 edt on 10/18/2024 near 9232 mudbrook st nw in jackson, oh after a member of the public called in an odor complaint. Local personnel utilized valves to shut in the leaking line around 18:00 edt that same day. An original assessment of the costs to replace the line were under the $145,400 operator loss threshold for an incident per 191.3. On 11/5/2024 at approximately 9:20 est, the enbridge gas ohio project manager for the replacement of the section of pipe with the leak informed pipeline safety that costs were now likely to eventually exceed the $145,400 threshold due to higher than expected environmental and contractor costs. The leak was called in as an incident at that time to the ohio public utility commission and the national response center. The section of pipe with the leak has been removed and sent to a 3rd party for analysis. A new section of pipe has been installed to replace the old line but is not yet in service. A supplemental report will be provided with the in-service date and results of the 3rd party lab analysis. 4/25/25 supplemental update: laboratory analysis has been completed. The results of the metallurgical analysis indicate that the leak occurred at an area of discrete pitting from internal corrosion at the bottom of the pipe (6:17 orientation). The leak was likely caused by the presence of an acidic brine (ph 2.92, measured at ambient pressure) with high salinity. The localized corrosion likely occurred at breaks in an otherwise thick protective scale or at areas under deposits at the bottom of the pipe. It is possible that there was a gas phase contribution (I.E., from CO2, h2s, and/or 02 corrosion), however, the gas phase contribution was likely secondary to the presence of the acidic brine. The cause of the brine acidity at this location is unknown, but a ph value of 2.92, measured at ambient pressure, is in excess of what is possible from CO2 gas dissolved in the process stream. Enbridge gas ohio has placed permanent ut gauges on the line for future internal corrosion monitoring. Pipeline was placed back into service on 1/7/25. 5/12/2025 updated final report: a14 was changed to "onshore pipeline" to reflect that pipe was considered a transmission asset for regulatory purposes. 5/20/2025: finalizing supplemental report with changes to a14.
Detailed record list
Report Received Date
2024-11-27 00:00:00
Iyear
2024
Report Number
20240132
Supplemental Number
40907
Report Type
Supplemental Final
Operator Id
4060
Name
Enbridge Gas Ohio
Operator Street Address
1201 East 55th Street
Operator City Name
Cleveland
Operator State Abbreviation
OH
Operator Postal Code
44103
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
40.871439
Location Longitude
-81.522747
Nrc Rpt Num
1415619
Additional Nrc Report Numbers
1415741
Commodity Released Type
Natural Gas
Unintentional Release
41.36
Intentional Release
0
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
Oh
Onshore Postal Code
44646
Onshore City Name
Jackson Township
Onshore County Name
Stark
Designated Location
Not Applicable
Pipe Fac Name
Storage Group 8
Segment Name
L#2453
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
6
Puddle Weld Ind
No
Pipe Wall Thickness
0.312
Pipe Smys
42000
Pipe Specification
X42
Pipe Seam Type
Longitudinal Erw - High Frequency
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
No
Pir Radius
149
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
115
Est Cost Intentional Release
0
Est Cost Prop Damage
569000
Est Cost Emergency
1000
Est Cost Other
0
Gas Cost In Mcf
2.785
Prpty
570115
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
1519
Gas Flow In Pipe In Mcf
0
Mop Psig
1565
Mop Cfr Section
192.619(A)(4)
Maop Established Date
2024-02-02 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Gas Odorized Ind
Yes
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
1500
Internal Inspection Ind
No
Diameter Change Ind
Yes
Unsuitable Mainline Ind
Yes
Tight Mitered Ind
Yes
Other Restrictions Ind
Yes
Operation Complications Ind
Yes
Low Flow Ind
Yes
Pipeline Function
Transmission In Storage Field
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Notification From Public
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
Leak was too small to be picked up by scada.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Localized Pitting
Int Water Acid Ind
Yes
Int Metallurgical Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
No
Corrosion Lining
No
Cleaning Dewatering
No
Corrosion Coupons
No
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
2013
Hydrtst Most Rcnt Pressure
2735
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
D***** E****
Preparer Title
Manager Gas Operations
Preparer Email
D*************@d*************.com
Preparer Telephone
3305715796
Local Contact Name
P***** J*****
Local Contact Email
P**************@d*************.com
Local Contact Telephone
330-592-7132
Authorizer Name
D***** E****
Authorizer Title
Manager Gas Operations
Authorizer Telephone
3305715796
Authorizer Email
D*************@d*************.com
Narrative
A transmission line leak was identified in ego's gas storage system (group 8) at approximately 16:15 edt on 10/18/2024 near 9232 mudbrook st nw in jackson, oh after a member of the public called in an odor complaint. Local personnel utilized valves to shut in the leaking line around 18:00 edt that same day. An original assessment of the costs to replace the line were under the $145,400 operator loss threshold for an incident per 191.3. On 11/5/2024 at approximately 9:20 est, the enbridge gas ohio project manager for the replacement of the section of pipe with the leak informed pipeline safety that costs were now likely to eventually exceed the $145,400 threshold due to higher than expected environmental and contractor costs. The leak was called in as an incident at that time to the ohio public utility commission and the national response center. The section of pipe with the leak has been removed and sent to a 3rd party for analysis. A new section of pipe has been installed to replace the old line but is not yet in service. A supplemental report will be provided with the in-service date and results of the 3rd party lab analysis. 4/25/25 supplemental update: laboratory analysis has been completed. The results of the metallurgical analysis indicate that the leak occurred at an area of discrete pitting from internal corrosion at the bottom of the pipe (6:17 orientation). The leak was likely caused by the presence of an acidic brine (ph 2.92, measured at ambient pressure) with high salinity. The localized corrosion likely occurred at breaks in an otherwise thick protective scale or at areas under deposits at the bottom of the pipe. It is possible that there was a gas phase contribution (I.E., from CO2, h2s, and/or 02 corrosion), however, the gas phase contribution was likely secondary to the presence of the acidic brine. The cause of the brine acidity at this location is unknown, but a ph value of 2.92, measured at ambient pressure, is in excess of what is possible from CO2 gas dissolved in the process stream. Enbridge gas ohio has placed permanent ut gauges on the line for future internal corrosion monitoring. Pipeline was placed back into service on 1/7/25. 5/12/2025 updated final report: a14 was changed to "onshore pipeline" to reflect that pipe was considered a transmission asset for regulatory purposes. 5/20/2025: finalizing supplemental report with changes to a14.
| Report Received Date | 2024-11-27 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240132 |
| Supplemental Number | 40907 |
| Report Type | Supplemental Final |
| Operator Id | 4060 PHMSA Enforcement |
| Name | Enbridge Gas Ohio |
| Operator Street Address | 1201 East 55th Street |
| Operator City Name | Cleveland |
| Operator State Abbreviation | OH |
| Operator Postal Code | 44103 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 40.871439 Google Maps OpenStreetMap |
| Location Longitude | -81.522747 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1415619 NRC Report How to search |
| Additional Nrc Report Numbers | 1415741 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 41.36 |
| Intentional Release | 0 |
| 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 | Oh |
| Onshore Postal Code | 44646 |
| Onshore City Name | Jackson Township |
| Onshore County Name | Stark |
| Designated Location | Not Applicable |
| Pipe Fac Name | Storage Group 8 |
| Segment Name | L#2453 |
| 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 | 6 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.312 |
| Pipe Smys | 42000 |
| Pipe Specification | X42 |
| Pipe Seam Type | Longitudinal Erw - High Frequency |
| 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 | No |
| Pir Radius | 149 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 115 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 569000 |
| Est Cost Emergency | 1000 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.785 |
| Prpty | 570115 |
| 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 | 1519 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 1565 |
| Mop Cfr Section | 192.619(A)(4) View CFR 49 §192 |
| Maop Established Date | 2024-02-02 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Gas Odorized Ind | Yes |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 1500 |
| Internal Inspection Ind | No |
| Diameter Change Ind | Yes |
| Unsuitable Mainline Ind | Yes |
| Tight Mitered Ind | Yes |
| Other Restrictions Ind | Yes |
| Operation Complications Ind | Yes |
| Low Flow Ind | Yes |
| Pipeline Function | Transmission In Storage Field |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Notification From Public |
| 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 | Leak was too small to be picked up by scada. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Localized Pitting |
| Int Water Acid Ind | Yes |
| Int Metallurgical Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | No |
| Corrosion Lining | No |
| Cleaning Dewatering | No |
| Corrosion Coupons | No |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 2013 |
| Hydrtst Most Rcnt Pressure | 2735 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | D***** E**** |
| Preparer Title | Manager Gas Operations |
| Preparer Email | D*************@d*************.com |
| Preparer Telephone | 3305715796 |
| Local Contact Name | P***** J***** |
| Local Contact Email | P**************@d*************.com |
| Local Contact Telephone | 330-592-7132 |
| Authorizer Name | D***** E**** |
| Authorizer Title | Manager Gas Operations |
| Authorizer Telephone | 3305715796 |
| Authorizer Email | D*************@d*************.com |
| Narrative | A transmission line leak was identified in ego's gas storage system (group 8) at approximately 16:15 edt on 10/18/2024 near 9232 mudbrook st nw in jackson, oh after a member of the public called in an odor complaint. Local personnel utilized valves to shut in the leaking line around 18:00 edt that same day. An original assessment of the costs to replace the line were under the $145,400 operator loss threshold for an incident per 191.3. On 11/5/2024 at approximately 9:20 est, the enbridge gas ohio project manager for the replacement of the section of pipe with the leak informed pipeline safety that costs were now likely to eventually exceed the $145,400 threshold due to higher than expected environmental and contractor costs. The leak was called in as an incident at that time to the ohio public utility commission and the national response center. The section of pipe with the leak has been removed and sent to a 3rd party for analysis. A new section of pipe has been installed to replace the old line but is not yet in service. A supplemental report will be provided with the in-service date and results of the 3rd party lab analysis. 4/25/25 supplemental update: laboratory analysis has been completed. The results of the metallurgical analysis indicate that the leak occurred at an area of discrete pitting from internal corrosion at the bottom of the pipe (6:17 orientation). The leak was likely caused by the presence of an acidic brine (ph 2.92, measured at ambient pressure) with high salinity. The localized corrosion likely occurred at breaks in an otherwise thick protective scale or at areas under deposits at the bottom of the pipe. It is possible that there was a gas phase contribution (I.E., from CO2, h2s, and/or 02 corrosion), however, the gas phase contribution was likely secondary to the presence of the acidic brine. The cause of the brine acidity at this location is unknown, but a ph value of 2.92, measured at ambient pressure, is in excess of what is possible from CO2 gas dissolved in the process stream. Enbridge gas ohio has placed permanent ut gauges on the line for future internal corrosion monitoring. Pipeline was placed back into service on 1/7/25. 5/12/2025 updated final report: a14 was changed to "onshore pipeline" to reflect that pipe was considered a transmission asset for regulatory purposes. 5/20/2025: finalizing supplemental report with changes to a14. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA