Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-02-17 — NC
Operator
Piedmont Natural Gas Co Inc
Cause
Other Outside Force Damage
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$200,000
Incident datetime
2023-02-17 00:00 UTC
Report number
Location
NC
Narrative
Piedmont natural gas responded to a report of a vehicle damaging a mainline valve. Upon arrival operator observed visual damage of the blowdown stack and detected a small gas leak from a grease fitting on the mainline valve. Field operations monitored a minor gas reading well below lel, enabling field operations to safely hand dig to expose the below ground piping to investigate the extent of the damage without any isolation of this segment. Gas flowed normally during the impacted segment of line 272 containing 272-mlv-3 site during the entirety of the repair response. Unable to determine gas volume.
Detailed record list
Report Received Date
2023-02-17 00:00:00
Iyear
2023
Report Number
20230018
Supplemental Number
37765
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
35.61886
Location Longitude
-80.3958
Nrc Rpt Num
1358400
Additional Nrc Report Numbers
1358492
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
Replacement Was On Normally Closed Bypass Piping Around Open Mainline Valve.
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Flow Upstream Was Monitored By Field Operations.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Flow Downstream Was Monitored By Field Operations.
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Nc
Onshore Postal Code
28146
Onshore City Name
Salisbury
Onshore County Name
Rowan
Designated Location
Not Applicable
Pipe Fac Name
Line 272-Mlv-3
Segment Name
Line 272
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Valve
Valve Type
Mainline
Valve Mainline Type
Ball
Valve Manufacturer
Rockwell
Installation Year
1998
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Seal Or Packing
Class Location Type
Class 2 Location
Could Be Hca
No
Pir Radius
137
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
0
Est Cost Intentional Release
0
Est Cost Prop Damage
200000
Est Cost Emergency
5000
Est Cost Other
0
Gas Cost In Mcf
0.1
Prpty
205000
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
658
Gas Flow In Pipe In Mcf
3300
Mop Psig
900
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1998-11-16 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
3700
Internal Inspection Ind
No
Diameter Change Ind
Yes
Unsuitable Mainline Ind
Yes
Tight Mitered Ind
Yes
Other Restrictions 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 Emergency Responder
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 too small to register on the scada system.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Outside Force Damage
Cause Details
Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation
Outside Force Type
Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation
Vehicle Subtype
Third Party
Driver Issued Citation Ind
Unknown
Driver In Control Ind
Unknown
Estimated Speed Unknown Ind
Yes
Vehicle Type
Passenger Car
Vehicle Travel From
Off-Road
Vehicle Travel Distance Ft
50
Protections Installed Ind
Yes
Protection Bollards Post Ind
Yes
Protection Barricades Ind
Yes
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
Manager- Pipeline Safety
Authorizer Telephone
704-731-4618
Authorizer Email
F***********@d**********.com
Narrative
Piedmont natural gas responded to a report of a vehicle damaging a mainline valve. Upon arrival operator observed visual damage of the blowdown stack and detected a small gas leak from a grease fitting on the mainline valve. Field operations monitored a minor gas reading well below lel, enabling field operations to safely hand dig to expose the below ground piping to investigate the extent of the damage without any isolation of this segment. Gas flowed normally during the impacted segment of line 272 containing 272-mlv-3 site during the entirety of the repair response. Unable to determine gas volume.
| Report Received Date | 2023-02-17 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230018 |
| Supplemental Number | 37765 |
| 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 | 35.61886 Google Maps OpenStreetMap |
| Location Longitude | -80.3958 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1358400 NRC Report How to search |
| Additional Nrc Report Numbers | 1358492 |
| 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 | Replacement Was On Normally Closed Bypass Piping Around Open Mainline Valve. |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Flow Upstream Was Monitored By Field Operations. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Flow Downstream Was Monitored By Field Operations. |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Nc |
| Onshore Postal Code | 28146 |
| Onshore City Name | Salisbury |
| Onshore County Name | Rowan |
| Designated Location | Not Applicable |
| Pipe Fac Name | Line 272-Mlv-3 |
| Segment Name | Line 272 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Valve |
| Valve Type | Mainline |
| Valve Mainline Type | Ball |
| Valve Manufacturer | Rockwell |
| Installation Year | 1998 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Class Location Type | Class 2 Location |
| Could Be Hca | No |
| Pir Radius | 137 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 0 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 200000 |
| Est Cost Emergency | 5000 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 0.1 |
| Prpty | 205000 |
| 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 | 658 |
| Gas Flow In Pipe In Mcf | 3300 |
| Mop Psig | 900 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1998-11-16 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 | 3700 |
| Internal Inspection Ind | No |
| Diameter Change Ind | Yes |
| Unsuitable Mainline Ind | Yes |
| Tight Mitered Ind | Yes |
| Other Restrictions 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 Emergency Responder |
| 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 too small to register on the scada system. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Outside Force Damage |
| Cause Details | Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation |
| Outside Force Type | Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation |
| Vehicle Subtype | Third Party |
| Driver Issued Citation Ind | Unknown |
| Driver In Control Ind | Unknown |
| Estimated Speed Unknown Ind | Yes |
| Vehicle Type | Passenger Car |
| Vehicle Travel From | Off-Road |
| Vehicle Travel Distance Ft | 50 |
| Protections Installed Ind | Yes |
| Protection Bollards Post Ind | Yes |
| Protection Barricades Ind | Yes |
| 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 | Manager- Pipeline Safety |
| Authorizer Telephone | 704-731-4618 |
| Authorizer Email | F***********@d**********.com |
| Narrative | Piedmont natural gas responded to a report of a vehicle damaging a mainline valve. Upon arrival operator observed visual damage of the blowdown stack and detected a small gas leak from a grease fitting on the mainline valve. Field operations monitored a minor gas reading well below lel, enabling field operations to safely hand dig to expose the below ground piping to investigate the extent of the damage without any isolation of this segment. Gas flowed normally during the impacted segment of line 272 containing 272-mlv-3 site during the entirety of the repair response. Unable to determine gas volume. |
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