Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2025-07-15 — NC
Operator
Piedmont Natural Gas Co Inc
Cause
Excavation Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$372,467
Incident datetime
2025-07-15 00:00 UTC
Report number
Location
NC
Narrative
Contractor bored into a 8" transmission line during a telecommunication installation. Use of mechanized equipment in the tolerance zone & excavator failed to support and protect facilities. The third-party contractor failed to follow established procedures and proceeded with hdd without obtaining prior authorization from the operator.
Detailed record list
Report Received Date
2025-07-15 00:00:00
Iyear
2025
Report Number
20250080
Supplemental Number
41274
Report Type
Supplemental 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
35.050678
Location Longitude
-81.940591
Nrc Rpt Num
1434725
Additional Nrc Report Numbers
1434854
Commodity Released Type
Natural Gas
Unintentional Release
6000
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
Northstar Performed A Bypass.
Communication State Fed Ind
Yes
Party Initiated Communication
Local/state/federal Emergency Responder
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Ran A Bypass.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Ran A Bypass.
Num Pub Evacuated
3
On Off Shore
Onshore
Onshore State Abbreviation
Sc
Onshore Postal Code
29316
Onshore City Name
Boiling Springs
Onshore County Name
Spartanburg
Designated Location
Not Applicable
Pipe Fac Name
Line 379
Segment Name
Line 379
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
84
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
8
Puddle Weld Ind
No
Pipe Wall Thickness
0.25
Pipe Smys
32000
Pipe Specification
Unknown
Pipe Seam Type
Longitudinal Erw - Unknown Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Epoxy
Coating Applied Ind
No
Installation Year
1998
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
1
Puncture Circum
1
Class Location Type
Class 1 Location
Could Be Hca
No
Not Flammable Ind
Not Flammable
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
24000
Est Cost Intentional Release
0
Est Cost Prop Damage
372467
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
4
Prpty
396467
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
660
Gas Flow In Pipe In Mcf
400
Mop Psig
800
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1998-10-08 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
17896
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
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
The incident was caused by a 3rd-party damage.
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
Yes
One Call System Ind
Yes
State Law Exempt Ind
No
Notify Cga Dirt
No
Pipeline Easement Row Ind
Yes
Joint Trench Ind
No
Cross Bore Ind
Yes
Depth Of Grade
Measured Depth From Grade
Depth Of Grade Detail
84
Excavator Type
Contractor
Excavator Equipment
Boring
Work Performed
Telecommunications
One Call Notified Ind
Yes
One Call Ticket Num
2506040902
White Lined Ind
Unknown
Locator Type
Contract Locator
Visible Marks
Yes
Service Interruption
No
Root Cause Category
Excavation Issue
Root Cause Type
Excavator Failed To Protect/shore/support Facilities
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
Contractor bored into a 8" transmission line during a telecommunication installation. Use of mechanized equipment in the tolerance zone & excavator failed to support and protect facilities. The third-party contractor failed to follow established procedures and proceeded with hdd without obtaining prior authorization from the operator.
| Report Received Date | 2025-07-15 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250080 |
| Supplemental Number | 41274 |
| Report Type | Supplemental 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 | 35.050678 Google Maps OpenStreetMap |
| Location Longitude | -81.940591 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1434725 NRC Report How to search |
| Additional Nrc Report Numbers | 1434854 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 6000 |
| 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 | Northstar Performed A Bypass. |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Local/state/federal Emergency Responder |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Ran A Bypass. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Ran A Bypass. |
| Num Pub Evacuated | 3 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Sc |
| Onshore Postal Code | 29316 |
| Onshore City Name | Boiling Springs |
| Onshore County Name | Spartanburg |
| Designated Location | Not Applicable |
| Pipe Fac Name | Line 379 |
| Segment Name | Line 379 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 84 |
| 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 | 8 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 32000 |
| Pipe Specification | Unknown |
| Pipe Seam Type | Longitudinal Erw - Unknown Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Epoxy |
| Coating Applied Ind | No |
| Installation Year | 1998 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Puncture Axial | 1 |
| Puncture Circum | 1 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Not Flammable Ind | Not Flammable |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 24000 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 372467 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 4 |
| Prpty | 396467 |
| 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 | 660 |
| Gas Flow In Pipe In Mcf | 400 |
| Mop Psig | 800 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1998-10-08 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 | 17896 |
| 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 | 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 | The incident was caused by a 3rd-party damage. |
| 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 | Yes |
| One Call System Ind | Yes |
| State Law Exempt Ind | No |
| Notify Cga Dirt | No |
| Pipeline Easement Row Ind | Yes |
| Joint Trench Ind | No |
| Cross Bore Ind | Yes |
| Depth Of Grade | Measured Depth From Grade |
| Depth Of Grade Detail | 84 |
| Excavator Type | Contractor |
| Excavator Equipment | Boring |
| Work Performed | Telecommunications |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 2506040902 |
| White Lined Ind | Unknown |
| Locator Type | Contract Locator |
| Visible Marks | Yes |
| Service Interruption | No |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Excavator Failed To Protect/shore/support Facilities |
| 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 | Contractor bored into a 8" transmission line during a telecommunication installation. Use of mechanized equipment in the tolerance zone & excavator failed to support and protect facilities. The third-party contractor failed to follow established procedures and proceeded with hdd without obtaining prior authorization from the operator. |
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