Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2025-08-20 — NC
Operator
Piedmont Natural Gas Co Inc
Cause
Other Incident Cause
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$492,742
Incident datetime
2025-08-20 00:00 UTC
Report number
Location
NC
Narrative
At approximately 11:15 a.M. On 7/23/25, a leak was reported along line 5 section 4 in an area being excavated for an ili reassessment interval dig. Gas initially was present and recorded with a combustible gas indicator (cgi). Stopples were welded on and a by-pass was utilized to maintain flow along the pipeline. A 65 foot section of pipeline was removed and replaced with tested pipe. The cut out section contained the assumed location of the leak, the anomaly that was to be assessed, as well as a previously repaired anomaly. The cutout section was non destructively examined, but no leaks were found; therefore, an estimate of gas released could not be determined.
Detailed record list
Report Received Date
2025-08-20 00:00:00
Iyear
2025
Report Number
20250090
Supplemental Number
41279
Report Type
Original Final
Operator Id
15518
Name
Piedmont Natural Gas Co Inc
Operator Street Address
525 South Tryon Street
Operator City Name
Charlotte
Operator State Abbreviation
NC
Operator Postal Code
28202
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
35.396262
Location Longitude
-78.071065
Nrc Rpt Num
1437735
Additional Nrc Report Numbers
1437807
Commodity Released Type
Natural Gas
Unintentional Release
0.01
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
No
Shutdown Explain
A Stopple Bypass Was Used To Isolate The Section.
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
A Bypass Was Made On The Pipe.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
A Bypass Was Made On The Pipe.
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Nc
Onshore Postal Code
27530
Onshore City Name
Goldsboro
Onshore County Name
Wayne
Designated Location
Not Applicable
Pipe Fac Name
Line 5
Segment Name
Line 5 Section 4
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
5
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
10
Puddle Weld Ind
No
Pipe Wall Thickness
0.188
Pipe Smys
42000
Pipe Specification
X46
Pipe Seam Type
Longitudinal Erw - Low Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
No
Installation Year
1959
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Suspect Leak But A Leak Was Not Identified.
Class Location Type
Class 3 Location
Could Be Hca
No
Not Flammable Ind
Not Flammable
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
Yes
Mca Buildng Human Occupy Ind
Yes
Est Cost Oper Paid
0
Est Cost Unintentional Release
0
Est Cost Intentional Release
0
Est Cost Prop Damage
492742
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
4.5
Prpty
492742
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
647
Gas Flow In Pipe In Mcf
28000
Mop Psig
695
Mop Cfr Section
192.619(C)
Maop Established Date
1969-10-29 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
Length Segment Isolated
20590
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
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
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
Identification by field team during a field activity.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Incident Cause
Cause Details
Unknown
Other Type
Unknown
Unknown Subtype
Investigation Complete, Cause Of Incident Unknown
Incident Unknown Comments
After Testing A Cause Could Not Be Determined.
Preparer Name
C********** R******
Preparer Title
Gas Regulatory Compliance Analyst
Preparer Email
C******************@d**********.com
Preparer Telephone
704-731-4680
Authorizer Name
F***** B****
Authorizer Title
Pipeline Safety Governance Manager
Authorizer Telephone
704-731-4618
Authorizer Email
F***********@d**********.com
Narrative
At approximately 11:15 a.M. On 7/23/25, a leak was reported along line 5 section 4 in an area being excavated for an ili reassessment interval dig. Gas initially was present and recorded with a combustible gas indicator (cgi). Stopples were welded on and a by-pass was utilized to maintain flow along the pipeline. A 65 foot section of pipeline was removed and replaced with tested pipe. The cut out section contained the assumed location of the leak, the anomaly that was to be assessed, as well as a previously repaired anomaly. The cutout section was non destructively examined, but no leaks were found; therefore, an estimate of gas released could not be determined.
| Report Received Date | 2025-08-20 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250090 |
| Supplemental Number | 41279 |
| Report Type | Original Final |
| Operator Id | 15518 PHMSA Enforcement |
| Name | Piedmont Natural Gas Co Inc |
| Operator Street Address | 525 South Tryon Street |
| Operator City Name | Charlotte |
| Operator State Abbreviation | NC |
| Operator Postal Code | 28202 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 35.396262 Google Maps OpenStreetMap |
| Location Longitude | -78.071065 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1437735 NRC Report How to search |
| Additional Nrc Report Numbers | 1437807 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 0.01 |
| 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 | No |
| Shutdown Explain | A Stopple Bypass Was Used To Isolate The Section. |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | A Bypass Was Made On The Pipe. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | A Bypass Was Made On The Pipe. |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Nc |
| Onshore Postal Code | 27530 |
| Onshore City Name | Goldsboro |
| Onshore County Name | Wayne |
| Designated Location | Not Applicable |
| Pipe Fac Name | Line 5 |
| Segment Name | Line 5 Section 4 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 5 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 10 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.188 |
| Pipe Smys | 42000 |
| Pipe Specification | X46 |
| Pipe Seam Type | Longitudinal Erw - Low Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | No |
| Installation Year | 1959 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Suspect Leak But A Leak Was Not Identified. |
| Class Location Type | Class 3 Location |
| Could Be Hca | No |
| Not Flammable Ind | Not Flammable |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | Yes |
| Mca Buildng Human Occupy Ind | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 0 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 492742 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 4.5 |
| Prpty | 492742 |
| 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 | 647 |
| Gas Flow In Pipe In Mcf | 28000 |
| Mop Psig | 695 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Maop Established Date | 1969-10-29 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 |
| Length Segment Isolated | 20590 |
| 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 | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| 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 | Identification by field team during a field activity. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Incident Cause |
| Cause Details | Unknown |
| Other Type | Unknown |
| Unknown Subtype | Investigation Complete, Cause Of Incident Unknown |
| Incident Unknown Comments | After Testing A Cause Could Not Be Determined. |
| Preparer Name | C********** R****** |
| Preparer Title | Gas Regulatory Compliance Analyst |
| Preparer Email | C******************@d**********.com |
| Preparer Telephone | 704-731-4680 |
| Authorizer Name | F***** B**** |
| Authorizer Title | Pipeline Safety Governance Manager |
| Authorizer Telephone | 704-731-4618 |
| Authorizer Email | F***********@d**********.com |
| Narrative | At approximately 11:15 a.M. On 7/23/25, a leak was reported along line 5 section 4 in an area being excavated for an ili reassessment interval dig. Gas initially was present and recorded with a combustible gas indicator (cgi). Stopples were welded on and a by-pass was utilized to maintain flow along the pipeline. A 65 foot section of pipeline was removed and replaced with tested pipe. The cut out section contained the assumed location of the leak, the anomaly that was to be assessed, as well as a previously repaired anomaly. The cutout section was non destructively examined, but no leaks were found; therefore, an estimate of gas released could not be determined. |
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