Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2021-11-22 — SC
Operator
Dominion Energy South Carolina, Inc.
Cause
Excavation Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$156,189
Incident datetime
2021-11-22 12:09
Report number
Location
SC, HORRY
Narrative
Supplemental report created to change a4 to 12:09 p.M. When the damage was done. On november 22, 2021, at approximately 12:09 p.M., dominion energy south carolina (desc) gas operations responded to a notification from a third party contractor concerning a natural gas leak near 301 el bethel road in conway, sc. The contractor was performing a directional drilling operation to install a water line parallel to the desc 6-inch plastic gas main. The boring contractor had properly notified sc811 and the gas facilities were accurately located and marked. The contractor performed the bore, and while performing the pull back, the boring equipment drifted off the original bore path into the natural gas line, causing a leak. Desc operations crews were able to isolate the leak at approximately by operating two isolation valves. No customers' gas service was lost and the leak garnered and no media coverage. The damaged gas main required extensive repairs and a new gas main was installed. The total cost of the repair was approximately $156,189, which exceeded the reportable threshold of $122,000. Ldf: 322718
Detailed record list
Occurred At
2021-11-22 12:09:00
Year
2021
Report Received Date
2021-12-16 00:00:00
Iyear
2021.0
Report Number
20210101.0
Supplemental Number
36147.0
Report Type
Supplemental Final
Operator Id
18408
Name
Dominion Energy South Carolina, Inc.
Operator Street Address
601 Taylor Road Mail Code J48
Operator City Name
Cayce
Operator State Abbreviation
SC
Operator Postal Code
29033
Local Datetime
2021-11-22 12:09:00
Time Zone
Eastern
Daylight Savings Ind
No
Location Street Address
301 El Bethel Road
Location City Name
Conway
Location County Name
Horry
Location State Abbreviation
SC
Location Postal Code
29568
Location Latitude
33.861299
Location Longitude
-79.092041
Flow Cont Key Crit Ind
Yes
Nrc Rpt Datetime
2021-11-22 18:25:00
Nrc Rpt Num
1322715
Additional Nrc Report Numbers
1322830
Commodity Released Type
Natural Gas
Unintentional Release
162.34
Intentional Release
0.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2021-11-22 12:09:00
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Initial Responder Com Datetime
2021-11-22 17:31:00
On Site Datetime
2021-11-22 12:33:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
204.0
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Main
Installation Year
2014.0
Manufactured Year
2014.0
Pipe Diameter
6.0
Pipe Specification
Astm D2513
Pipe Manufacturer
Driscoplex
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Plastic Sdr
13.5
Material Pe Pipe Code
2406
Release Type
Mechanical Puncture
Puncture Axial
5.5
Puncture Circum
5.5
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
156189.0
Est Cost Emergency
0.0
Est Cost Other
0.0
Gas Cost In Mcf
8.64
Est Cost Unintentional Release
1403.0
Est Cost Intentional Release
0.0
Prpty
157592.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
0.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
0.0
Num Business Building Affctd
0.0
Accident Psig
45.0
Normal Psig
45.0
Mop Psig
60.0
Mop Cfr Section
192.619(A)(2)
Maop Established Date
2014-07-14 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Odorized By Others
Gas Odorized Lvl Not Msrd Ind
Yes
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
Pressure change due to the leak was not substantial enough to be observed by the control room.
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
Yes
Public Row Ind
Yes
Public Subtype
State Highway
Excavator Type
Contractor
Excavator Equipment
Directional Drilling
Work Performed
Water
One Call Notified Ind
Yes
One Call Ticket Num
2111022187
Locator Type
Contract Locator
Visible Marks
Yes
Service Interruption
No
Root Cause Category
Excavation Issue
Root Cause Type
Excavator Failed To Maintain Clearance After Verifying Marks
Preparer Name
J***** F***
Preparer Title
Engineer Iii - Pipeline Compliance
Preparer Email
J**********@d*************.com
Preparer Telephone
803-260-3602
Local Contact Name
D***** W******
Local Contact Email
D*************@d*************.com
Local Contact Telephone
843-745-7984
Authorizer Name
C**** O********
Authorizer Title
Director - Gas Operations
Authorizer Telephone
803-817-9245
Authorizer Email
C****************@d*************.com
Narrative
Supplemental report created to change a4 to 12:09 p.M. When the damage was done. On november 22, 2021, at approximately 12:09 p.M., dominion energy south carolina (desc) gas operations responded to a notification from a third party contractor concerning a natural gas leak near 301 el bethel road in conway, sc. The contractor was performing a directional drilling operation to install a water line parallel to the desc 6-inch plastic gas main. The boring contractor had properly notified sc811 and the gas facilities were accurately located and marked. The contractor performed the bore, and while performing the pull back, the boring equipment drifted off the original bore path into the natural gas line, causing a leak. Desc operations crews were able to isolate the leak at approximately by operating two isolation valves. No customers' gas service was lost and the leak garnered and no media coverage. The damaged gas main required extensive repairs and a new gas main was installed. The total cost of the repair was approximately $156,189, which exceeded the reportable threshold of $122,000. Ldf: 322718
| Occurred At | 2021-11-22 12:09:00 |
|---|---|
| Year | 2021 |
| Report Received Date | 2021-12-16 00:00:00 |
| Iyear | 2021.0 |
| Report Number | 20210101.0 |
| Supplemental Number | 36147.0 |
| Report Type | Supplemental Final |
| Operator Id | 18408 PHMSA Enforcement |
| Name | Dominion Energy South Carolina, Inc. |
| Operator Street Address | 601 Taylor Road Mail Code J48 |
| Operator City Name | Cayce |
| Operator State Abbreviation | SC |
| Operator Postal Code | 29033 |
| Local Datetime | 2021-11-22 12:09:00 |
| Time Zone | Eastern |
| Daylight Savings Ind | No |
| Location Street Address | 301 El Bethel Road |
| Location City Name | Conway |
| Location County Name | Horry |
| Location State Abbreviation | SC |
| Location Postal Code | 29568 |
| Location Latitude | 33.861299 Google Maps OpenStreetMap |
| Location Longitude | -79.092041 Google Maps OpenStreetMap |
| Flow Cont Key Crit Ind | Yes |
| Nrc Rpt Datetime | 2021-11-22 18:25:00 |
| Nrc Rpt Num | 1322715 NRC Report How to search |
| Additional Nrc Report Numbers | 1322830 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 162.34 |
| Intentional Release | 0.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2021-11-22 12:09:00 |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Initial Responder Com Datetime | 2021-11-22 17:31:00 |
| On Site Datetime | 2021-11-22 12:33:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 204.0 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Installation Year | 2014.0 |
| Manufactured Year | 2014.0 |
| Pipe Diameter | 6.0 |
| Pipe Specification | Astm D2513 |
| Pipe Manufacturer | Driscoplex |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Plastic Sdr | 13.5 |
| Material Pe Pipe Code | 2406 |
| Release Type | Mechanical Puncture |
| Puncture Axial | 5.5 |
| Puncture Circum | 5.5 |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 156189.0 |
| Est Cost Emergency | 0.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 8.64 |
| Est Cost Unintentional Release | 1403.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 157592.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 0.0 |
| Num Business Building Affctd | 0.0 |
| Accident Psig | 45.0 |
| Normal Psig | 45.0 |
| Mop Psig | 60.0 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 2014-07-14 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Odorized By Others |
| Gas Odorized Lvl Not Msrd Ind | Yes |
| 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 | Pressure change due to the leak was not substantial enough to be observed by the control room. |
| 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 | Yes |
| Public Row Ind | Yes |
| Public Subtype | State Highway |
| Excavator Type | Contractor |
| Excavator Equipment | Directional Drilling |
| Work Performed | Water |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 2111022187 |
| Locator Type | Contract Locator |
| Visible Marks | Yes |
| Service Interruption | No |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Excavator Failed To Maintain Clearance After Verifying Marks |
| Preparer Name | J***** F*** |
| Preparer Title | Engineer Iii - Pipeline Compliance |
| Preparer Email | J**********@d*************.com |
| Preparer Telephone | 803-260-3602 |
| Local Contact Name | D***** W****** |
| Local Contact Email | D*************@d*************.com |
| Local Contact Telephone | 843-745-7984 |
| Authorizer Name | C**** O******** |
| Authorizer Title | Director - Gas Operations |
| Authorizer Telephone | 803-817-9245 |
| Authorizer Email | C****************@d*************.com |
| Narrative | Supplemental report created to change a4 to 12:09 p.M. When the damage was done. On november 22, 2021, at approximately 12:09 p.M., dominion energy south carolina (desc) gas operations responded to a notification from a third party contractor concerning a natural gas leak near 301 el bethel road in conway, sc. The contractor was performing a directional drilling operation to install a water line parallel to the desc 6-inch plastic gas main. The boring contractor had properly notified sc811 and the gas facilities were accurately located and marked. The contractor performed the bore, and while performing the pull back, the boring equipment drifted off the original bore path into the natural gas line, causing a leak. Desc operations crews were able to isolate the leak at approximately by operating two isolation valves. No customers' gas service was lost and the leak garnered and no media coverage. The damaged gas main required extensive repairs and a new gas main was installed. The total cost of the repair was approximately $156,189, which exceeded the reportable threshold of $122,000. Ldf: 322718 |
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