Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2023-06-26 — MI
Operator
Semco Energy Gas Company
Cause
Excavation Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$3,278
Incident datetime
2023-06-26 00:00 UTC
Report number
Location
MI, MACOMB
Narrative
On 05/26/23, a gas main located at 29920 jamestown drive, chesterfield twp, mi, was struck by a third-party excavator while attempting to fix a leaking water line. The contractor then called 911 and began evacuating nearby residents. According to the contractor, the gas leak ignited within approximately 5 minutes of the gas main hit. The fire then spread to the home. Semco dispatch was notified of the incident by the local police department at 10:53 am. Semco crews arrived, and once local fire personnel secured the scene, semco crews secured the 2" plastic main by 12:09 pm. Repairs, purging, and re-activation of gas mains were completed by 05/26/23 22:38 pm. The following morning 05/27/23 semco crews began relighting 26 customers at 08:00 am and completed the relights by approximately 11:45 am. Upon investigation, the excavator dug using a mini-excavator within the 4' caution zone of the marked gas lines without hand exposing, resulting in damage to the gas line and a release of gas. It was also determined that although the main and service lines feeding the addressed house were marked accurately, a portion of main located to the west of the service line was not marked, due to a map error. Additionally, the contractor hit an underground electrical service line in the same excavation which was likely the source of ignition.
Detailed record list
Report Received Date
2023-06-26 00:00:00
Iyear
2023.0
Report Number
20230030.0
Supplemental Number
38490.0
Report Type
Supplemental Final
Operator Id
18472
Name
Semco Energy Gas Company
Operator Street Address
1411 Third Street
Operator City Name
Port Huron
Operator State Abbreviation
MI
Operator Postal Code
48060.0
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Street Address
29920 Jamestown Drive
Location City Name
Chesterfield Township
Location County Name
Macomb
Location State Abbreviation
MI
Location Postal Code
48051.0
Location Latitude
42.68316
Location Longitude
-82.80843
Flow Cont Main Valve Ind
Yes
Flow Cont Squeeze Off Ind
Yes
Nrc Rpt Num
1368330.0
Additional Nrc Report Numbers
1368665.0
Commodity Released Type
Natural Gas
Unintentional Release
15.09
Intentional Release
0.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
Yes
How Extinguished
Local/state/federal Emergency Responder
Gas Consumed By Fire In Mcf
15.09
Explode Ind
No
Num Pub Evacuated
2.0
Federal
No
Location Type
Private Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
30.0
Other Underground Facilities
Yes
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Main
Installation Year
1981.0
Pipe Diameter
2.0
Pipe Specification
Unknown
Pipe Manufacturer
Unknown
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Wt Plastic Unknown Ind
Unknown
Material Pe Pipe Code
Unknown
Release Type
Mechanical Puncture
Puncture Axial
1.2
Puncture Circum
0.2
Class Location Type
Class 3 Location
Est Cost Oper Paid
140000.0
Est Cost Prop Damage
3278.0
Est Cost Emergency
14025.0
Est Cost Other
0.0
Gas Cost In Mcf
4.5
Est Cost Unintentional Release
68.0
Est Cost Intentional Release
0.0
Prpty
157371.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
26.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
26.0
Num Business Building Affctd
0.0
Accident Psig
55.0
Normal Psig
55.0
Mop Psig
60.0
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1981-07-10 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Injection Pump
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 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
Incident was caused by third party damage.
Employee Drug Test Ind
Yes
Num Employees Tested
1
Num Employees Failed
0
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
Private Row Ind
Yes
Private Subtype
Private Landowner
Excavator Type
Contractor
Excavator Equipment
Backhoe/trackhoe
Work Performed
Water
One Call Notified Ind
Yes
One Call Ticket Num
2023050000000.0
Locator Type
Facility Owner
Visible Marks
Yes
Service Interruption
Yes
Service Interruption Hours
21.0
Root Cause Category
Excavation Issue
Root Cause Type
Improper Excavation Practice Not Listed Above
Preparer Name
J******* P***
Preparer Title
Supervisor Of Codes And Standards
Preparer Email
J************@s**********.com
Preparer Telephone
8102422381
Local Contact Name
A*** D*******
Local Contact Email
A************@s**********.com
Local Contact Telephone
(810) 887-5027
Authorizer Name
P*** L***
Authorizer Title
Director Of Operations Support
Authorizer Telephone
(810) 887-5027
Authorizer Email
P********@s**********.com
Narrative
On 05/26/23, a gas main located at 29920 jamestown drive, chesterfield twp, mi, was struck by a third-party excavator while attempting to fix a leaking water line. The contractor then called 911 and began evacuating nearby residents. According to the contractor, the gas leak ignited within approximately 5 minutes of the gas main hit. The fire then spread to the home. Semco dispatch was notified of the incident by the local police department at 10:53 am. Semco crews arrived, and once local fire personnel secured the scene, semco crews secured the 2" plastic main by 12:09 pm. Repairs, purging, and re-activation of gas mains were completed by 05/26/23 22:38 pm. The following morning 05/27/23 semco crews began relighting 26 customers at 08:00 am and completed the relights by approximately 11:45 am. Upon investigation, the excavator dug using a mini-excavator within the 4' caution zone of the marked gas lines without hand exposing, resulting in damage to the gas line and a release of gas. It was also determined that although the main and service lines feeding the addressed house were marked accurately, a portion of main located to the west of the service line was not marked, due to a map error. Additionally, the contractor hit an underground electrical service line in the same excavation which was likely the source of ignition.
| Report Received Date | 2023-06-26 00:00:00 |
|---|---|
| Iyear | 2023.0 |
| Report Number | 20230030.0 |
| Supplemental Number | 38490.0 |
| Report Type | Supplemental Final |
| Operator Id | 18472 PHMSA Enforcement |
| Name | Semco Energy Gas Company |
| Operator Street Address | 1411 Third Street |
| Operator City Name | Port Huron |
| Operator State Abbreviation | MI |
| Operator Postal Code | 48060.0 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Street Address | 29920 Jamestown Drive |
| Location City Name | Chesterfield Township |
| Location County Name | Macomb |
| Location State Abbreviation | MI |
| Location Postal Code | 48051.0 |
| Location Latitude | 42.68316 Google Maps OpenStreetMap |
| Location Longitude | -82.80843 Google Maps OpenStreetMap |
| Flow Cont Main Valve Ind | Yes |
| Flow Cont Squeeze Off Ind | Yes |
| Nrc Rpt Num | 1368330.0 NRC Report How to search |
| Additional Nrc Report Numbers | 1368665.0 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 15.09 |
| Intentional Release | 0.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | Yes |
| How Extinguished | Local/state/federal Emergency Responder |
| Gas Consumed By Fire In Mcf | 15.09 |
| Explode Ind | No |
| Num Pub Evacuated | 2.0 |
| Federal | No |
| Location Type | Private Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 30.0 |
| Other Underground Facilities | Yes |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Installation Year | 1981.0 |
| Pipe Diameter | 2.0 |
| Pipe Specification | Unknown |
| Pipe Manufacturer | Unknown |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Wt Plastic Unknown Ind | Unknown |
| Material Pe Pipe Code | Unknown |
| Release Type | Mechanical Puncture |
| Puncture Axial | 1.2 |
| Puncture Circum | 0.2 |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 140000.0 |
| Est Cost Prop Damage | 3278.0 |
| Est Cost Emergency | 14025.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 4.5 |
| Est Cost Unintentional Release | 68.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 157371.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 26.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 26.0 |
| Num Business Building Affctd | 0.0 |
| Accident Psig | 55.0 |
| Normal Psig | 55.0 |
| Mop Psig | 60.0 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1981-07-10 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Injection Pump |
| 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 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 | Incident was caused by third party damage. |
| Employee Drug Test Ind | Yes |
| Num Employees Tested | 1 |
| Num Employees Failed | 0 |
| 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 |
| Private Row Ind | Yes |
| Private Subtype | Private Landowner |
| Excavator Type | Contractor |
| Excavator Equipment | Backhoe/trackhoe |
| Work Performed | Water |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 2023050000000.0 |
| Locator Type | Facility Owner |
| Visible Marks | Yes |
| Service Interruption | Yes |
| Service Interruption Hours | 21.0 |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Improper Excavation Practice Not Listed Above |
| Preparer Name | J******* P*** |
| Preparer Title | Supervisor Of Codes And Standards |
| Preparer Email | J************@s**********.com |
| Preparer Telephone | 8102422381 |
| Local Contact Name | A*** D******* |
| Local Contact Email | A************@s**********.com |
| Local Contact Telephone | (810) 887-5027 |
| Authorizer Name | P*** L*** |
| Authorizer Title | Director Of Operations Support |
| Authorizer Telephone | (810) 887-5027 |
| Authorizer Email | P********@s**********.com |
| Narrative | On 05/26/23, a gas main located at 29920 jamestown drive, chesterfield twp, mi, was struck by a third-party excavator while attempting to fix a leaking water line. The contractor then called 911 and began evacuating nearby residents. According to the contractor, the gas leak ignited within approximately 5 minutes of the gas main hit. The fire then spread to the home. Semco dispatch was notified of the incident by the local police department at 10:53 am. Semco crews arrived, and once local fire personnel secured the scene, semco crews secured the 2" plastic main by 12:09 pm. Repairs, purging, and re-activation of gas mains were completed by 05/26/23 22:38 pm. The following morning 05/27/23 semco crews began relighting 26 customers at 08:00 am and completed the relights by approximately 11:45 am. Upon investigation, the excavator dug using a mini-excavator within the 4' caution zone of the marked gas lines without hand exposing, resulting in damage to the gas line and a release of gas. It was also determined that although the main and service lines feeding the addressed house were marked accurately, a portion of main located to the west of the service line was not marked, due to a map error. Additionally, the contractor hit an underground electrical service line in the same excavation which was likely the source of ignition. |
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