Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2023-07-20 — MO
Operator
Summit Natural Gas Of Missouri
Cause
Excavation Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$4,500
Incident datetime
2023-07-20 00:00 UTC
Report number
Location
MO, WRIGHT
Narrative
On june 26th, 2023, a&a cable was installing a new fiber optic line in mountain grove, missouri. A&a was subcontracting for mastec doing fiber installations. A&a was blind boring approximately 300 feet, crossing multiple natural gas lines, communications lines, a sewer main, and a water main without exposing or potholing any of the utilities before excavation took place. During this blind bore shot a 2' pe natural gas main operated by summit natural gas was struck. The gas line was located accurately by a sngmo technician under the locate request number 231690282. Once the gas line was struck by the boring machine the natural gas migrated following the path of a sewer drain and entered an empty detached garage / wash bay owned and operated by craig hurt funeral home. The garage contained a hanging style furnace with a standing pilot. Once an adequate volume of gas had entered the structure to reach the lel the gas ignited, and a hard ignition and fire was the result. The lack of debris field and review of video indicated there was no sudden and violent release of energy constituting an explosion. Approximately 152 mcf of natural gas was lost due to the rupture of the gas main. Two vehicles and other privately owned materials were lost in the subsequent fire in the garage. The structure and contents were a total loss.
Detailed record list
Report Received Date
2023-07-20 00:00:00
Iyear
2023.0
Report Number
20230036.0
Supplemental Number
38450.0
Report Type
Supplemental
Operator Id
32074
Name
Summit Natural Gas Of Missouri
Operator Street Address
116 Chiefs Court
Operator City Name
Branson
Operator State Abbreviation
MO
Operator Postal Code
65616.0
Time Zone
Central
Daylight Savings Ind
Yes
Location Street Address
West 4th Street
Location City Name
Mountain Grove
Location County Name
Wright
Location State Abbreviation
MO
Location Postal Code
65711.0
Location Latitude
37.13184
Location Longitude
-92.26381
Flow Cont Main Valve Ind
Yes
Nrc Rpt Num
1371439.0
Additional Nrc Report Numbers
1371439.0
Commodity Released Type
Natural Gas
Unintentional Release
152.0
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
0
Explode Ind
No
Num Pub Evacuated
6.0
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Federal
No
Location Type
Utility Right-Of-Way / Easement
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
72.0
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Main
Pipe Diameter
2.0
Pipe Specification
Astm D2513 - Sdr 11
Pipe Manufacturer
Plexco
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Wt Plastic
0.216
Material Pe Pipe Code
2406
Release Type
Mechanical Puncture
Puncture Axial
2.0
Puncture Circum
2.0
Class Location Type
Class 3 Location
Est Cost Oper Paid
250000.0
Est Cost Prop Damage
4500.0
Est Cost Emergency
15000.0
Est Cost Other
0.0
Gas Cost In Mcf
10.529
Est Cost Unintentional Release
1600.0
Est Cost Intentional Release
0.0
Prpty
271100.0
Commercial Affected
3.0
Industrial Affected
0.0
Residences Affected
3.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
3.0
Num Business Building Affctd
3.0
Accident Psig
38.0
Normal Psig
38.0
Mop Psig
50.0
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1995-05-15 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Odorized By Others
Gas Odorized Level
0.6
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
Damage was caused by mechanical damage of blind boring
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
Excavator Type
Contractor
Excavator Equipment
Directional Drilling
Work Performed
Telecommunications
One Call Notified Ind
Yes
One Call Ticket Num
231690282.0
Locator Type
Facility Owner
Visible Marks
Yes
Service Interruption
Yes
Service Interruption Hours
26.0
Root Cause Category
Excavation Issue
Root Cause Type
Improper Excavation Practice Not Listed Above
Excvtn Dmg Third Party Ind
Yes
Preparer Name
J***** S******
Preparer Title
Operations Manager
Preparer Email
J*******@s***************.com
Preparer Telephone
417-349-0512
Local Contact Name
J***** S******
Local Contact Email
J*******@s***************.com
Local Contact Telephone
417-349-0512
Authorizer Name
M**** P*****
Authorizer Title
Director Of Operations - Missouri
Authorizer Telephone
720-981-2116
Authorizer Email
M******@s**************.com
Narrative
On june 26th, 2023, a&a cable was installing a new fiber optic line in mountain grove, missouri. A&a was subcontracting for mastec doing fiber installations. A&a was blind boring approximately 300 feet, crossing multiple natural gas lines, communications lines, a sewer main, and a water main without exposing or potholing any of the utilities before excavation took place. During this blind bore shot a 2' pe natural gas main operated by summit natural gas was struck. The gas line was located accurately by a sngmo technician under the locate request number 231690282. Once the gas line was struck by the boring machine the natural gas migrated following the path of a sewer drain and entered an empty detached garage / wash bay owned and operated by craig hurt funeral home. The garage contained a hanging style furnace with a standing pilot. Once an adequate volume of gas had entered the structure to reach the lel the gas ignited, and a hard ignition and fire was the result. The lack of debris field and review of video indicated there was no sudden and violent release of energy constituting an explosion. Approximately 152 mcf of natural gas was lost due to the rupture of the gas main. Two vehicles and other privately owned materials were lost in the subsequent fire in the garage. The structure and contents were a total loss.
| Report Received Date | 2023-07-20 00:00:00 |
|---|---|
| Iyear | 2023.0 |
| Report Number | 20230036.0 |
| Supplemental Number | 38450.0 |
| Report Type | Supplemental |
| Operator Id | 32074 PHMSA Enforcement |
| Name | Summit Natural Gas Of Missouri |
| Operator Street Address | 116 Chiefs Court |
| Operator City Name | Branson |
| Operator State Abbreviation | MO |
| Operator Postal Code | 65616.0 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Street Address | West 4th Street |
| Location City Name | Mountain Grove |
| Location County Name | Wright |
| Location State Abbreviation | MO |
| Location Postal Code | 65711.0 |
| Location Latitude | 37.13184 Google Maps OpenStreetMap |
| Location Longitude | -92.26381 Google Maps OpenStreetMap |
| Flow Cont Main Valve Ind | Yes |
| Nrc Rpt Num | 1371439.0 NRC Report How to search |
| Additional Nrc Report Numbers | 1371439.0 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 152.0 |
| 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 | 0 |
| Explode Ind | No |
| Num Pub Evacuated | 6.0 |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Federal | No |
| Location Type | Utility Right-Of-Way / Easement |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 72.0 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Pipe Diameter | 2.0 |
| Pipe Specification | Astm D2513 - Sdr 11 |
| Pipe Manufacturer | Plexco |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Wt Plastic | 0.216 |
| Material Pe Pipe Code | 2406 |
| Release Type | Mechanical Puncture |
| Puncture Axial | 2.0 |
| Puncture Circum | 2.0 |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 250000.0 |
| Est Cost Prop Damage | 4500.0 |
| Est Cost Emergency | 15000.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 10.529 |
| Est Cost Unintentional Release | 1600.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 271100.0 |
| Commercial Affected | 3.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 3.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 3.0 |
| Num Business Building Affctd | 3.0 |
| Accident Psig | 38.0 |
| Normal Psig | 38.0 |
| Mop Psig | 50.0 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1995-05-15 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Odorized By Others |
| Gas Odorized Level | 0.6 |
| 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 | Damage was caused by mechanical damage of blind boring |
| 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 |
| Excavator Type | Contractor |
| Excavator Equipment | Directional Drilling |
| Work Performed | Telecommunications |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 231690282.0 |
| Locator Type | Facility Owner |
| Visible Marks | Yes |
| Service Interruption | Yes |
| Service Interruption Hours | 26.0 |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Improper Excavation Practice Not Listed Above |
| Excvtn Dmg Third Party Ind | Yes |
| Preparer Name | J***** S****** |
| Preparer Title | Operations Manager |
| Preparer Email | J*******@s***************.com |
| Preparer Telephone | 417-349-0512 |
| Local Contact Name | J***** S****** |
| Local Contact Email | J*******@s***************.com |
| Local Contact Telephone | 417-349-0512 |
| Authorizer Name | M**** P***** |
| Authorizer Title | Director Of Operations - Missouri |
| Authorizer Telephone | 720-981-2116 |
| Authorizer Email | M******@s**************.com |
| Narrative | On june 26th, 2023, a&a cable was installing a new fiber optic line in mountain grove, missouri. A&a was subcontracting for mastec doing fiber installations. A&a was blind boring approximately 300 feet, crossing multiple natural gas lines, communications lines, a sewer main, and a water main without exposing or potholing any of the utilities before excavation took place. During this blind bore shot a 2' pe natural gas main operated by summit natural gas was struck. The gas line was located accurately by a sngmo technician under the locate request number 231690282. Once the gas line was struck by the boring machine the natural gas migrated following the path of a sewer drain and entered an empty detached garage / wash bay owned and operated by craig hurt funeral home. The garage contained a hanging style furnace with a standing pilot. Once an adequate volume of gas had entered the structure to reach the lel the gas ignited, and a hard ignition and fire was the result. The lack of debris field and review of video indicated there was no sudden and violent release of energy constituting an explosion. Approximately 152 mcf of natural gas was lost due to the rupture of the gas main. Two vehicles and other privately owned materials were lost in the subsequent fire in the garage. The structure and contents were a total loss. |
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