Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2019-02-28 — CA
Operator
Southwest Gas Corp
Cause
Other Outside Force Damage
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$138,000
Incident datetime
2019-02-28 15:09
Report number
Location
CA, EL DORADO
Narrative
Southwest gas was notified of a structure fire at 3281 south upper truckee road in south lake tahoe, ca. Once crews were on scene, it was determined that natural gas was blowing from the meter set assembly. The lake valley fire department was already on scene and fire department personnel were able to secure the flow of gas utilizing the valve on the riser (stopcock). Southwest gas personnel on scene conducted a leak survey and found no indication of below ground natural gas reads. Once the fire was extinguished, a failure was discovered on a 3/4" steel nipple just above the stopcock. The apparent cause of the damage to the meter set assembly was snow load, but the cause of that loading is under investigation. A supplemental report will be provided when that investigation is complete. Supplement: the incident occurred during an extreme weather event with excessive snow. The cause of the failure of the pipe nipple was the application of up to four successive dynamic loadings of snow and/or ice falling onto the pipe nipple from the roof of the residence. The snow and/or ice was either "natural force damage," "other outside force damage," or a combination of both. The precise cause or causes cannot be determined due to the loss of evidence caused by the fire and the fire-fighting efforts.
Detailed record list
Occurred At
2019-02-28 15:09:00
Year
2019
Report Received Date
2019-03-29 00:00:00
Iyear
2019.0
Report Number
20190033.0
Supplemental Number
33153.0
Report Type
Supplemental Final
Operator Id
18536
Name
Southwest Gas Corp
Operator Street Address
8360 S. Durango Drive
Operator City Name
Las Vegas
Operator State Abbreviation
NV
Operator Postal Code
89113
Local Datetime
2019-02-28 15:40:00
Location Street Address
3281 South Upper Truckee
Location City Name
South Lake Tahoe
Location County Name
El Dorado
Location State Abbreviation
CA
Location Postal Code
96150
Location Latitude
38.81815
Location Longitude
-120.02029
Nrc Rpt Datetime
2019-02-28 18:24:00
Nrc Rpt Num
1238918
Commodity Released Type
Natural Gas
Unintentional Release
4.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
Yes
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2019-02-28 15:09:00
On Site Datetime
2019-02-28 15:40:00
Federal
No
Location Type
Private Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance (E.g. Value Or Regulator Station, Outdoor Meter Set)
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Outside Meter/regulator Set
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown
Wt Steel
0.14
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
138000.0
Est Cost Emergency
274.0
Est Cost Other
0.0
Est Cost Unintentional Release
24.0
Prpty
138298.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
1.0
Accident Psig
60.0
Normal Psig
60.0
Mop Psig
60.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
No
Accident Identifier
Notification From Emergency Responder
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Outside Force Damage
Cause Details
Other Outside Force Damage
Outside Force Type
Other Outside Force Damage
Osf Other Details
See Part H, Narrative
Preparer Name
M**** D*******
Preparer Title
Engineering Supervisor Compliance
Preparer Email
M*************@s****.com
Preparer Telephone
775-887-2837
Authorizer Name
M****** H******
Authorizer Title
Director Of District Operations Nnv
Authorizer Telephone
775-887-2744
Authorizer Email
M**************@s****.com
Narrative
Southwest gas was notified of a structure fire at 3281 south upper truckee road in south lake tahoe, ca. Once crews were on scene, it was determined that natural gas was blowing from the meter set assembly. The lake valley fire department was already on scene and fire department personnel were able to secure the flow of gas utilizing the valve on the riser (stopcock). Southwest gas personnel on scene conducted a leak survey and found no indication of below ground natural gas reads. Once the fire was extinguished, a failure was discovered on a 3/4" steel nipple just above the stopcock. The apparent cause of the damage to the meter set assembly was snow load, but the cause of that loading is under investigation. A supplemental report will be provided when that investigation is complete. Supplement: the incident occurred during an extreme weather event with excessive snow. The cause of the failure of the pipe nipple was the application of up to four successive dynamic loadings of snow and/or ice falling onto the pipe nipple from the roof of the residence. The snow and/or ice was either "natural force damage," "other outside force damage," or a combination of both. The precise cause or causes cannot be determined due to the loss of evidence caused by the fire and the fire-fighting efforts.
| Occurred At | 2019-02-28 15:09:00 |
|---|---|
| Year | 2019 |
| Report Received Date | 2019-03-29 00:00:00 |
| Iyear | 2019.0 |
| Report Number | 20190033.0 |
| Supplemental Number | 33153.0 |
| Report Type | Supplemental Final |
| Operator Id | 18536 PHMSA Enforcement |
| Name | Southwest Gas Corp |
| Operator Street Address | 8360 S. Durango Drive |
| Operator City Name | Las Vegas |
| Operator State Abbreviation | NV |
| Operator Postal Code | 89113 |
| Local Datetime | 2019-02-28 15:40:00 |
| Location Street Address | 3281 South Upper Truckee |
| Location City Name | South Lake Tahoe |
| Location County Name | El Dorado |
| Location State Abbreviation | CA |
| Location Postal Code | 96150 |
| Location Latitude | 38.81815 Google Maps OpenStreetMap |
| Location Longitude | -120.02029 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2019-02-28 18:24:00 |
| Nrc Rpt Num | 1238918 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | Yes |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2019-02-28 15:09:00 |
| On Site Datetime | 2019-02-28 15:40:00 |
| Federal | No |
| Location Type | Private Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance (E.g. Value Or Regulator Station, Outdoor Meter Set) |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Outside Meter/regulator Set |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown |
| Wt Steel | 0.14 |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 138000.0 |
| Est Cost Emergency | 274.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 24.0 |
| Prpty | 138298.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 1.0 |
| Accident Psig | 60.0 |
| Normal Psig | 60.0 |
| Mop Psig | 60.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Emergency Responder |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Outside Force Damage |
| Cause Details | Other Outside Force Damage |
| Outside Force Type | Other Outside Force Damage |
| Osf Other Details | See Part H, Narrative |
| Preparer Name | M**** D******* |
| Preparer Title | Engineering Supervisor Compliance |
| Preparer Email | M*************@s****.com |
| Preparer Telephone | 775-887-2837 |
| Authorizer Name | M****** H****** |
| Authorizer Title | Director Of District Operations Nnv |
| Authorizer Telephone | 775-887-2744 |
| Authorizer Email | M**************@s****.com |
| Narrative | Southwest gas was notified of a structure fire at 3281 south upper truckee road in south lake tahoe, ca. Once crews were on scene, it was determined that natural gas was blowing from the meter set assembly. The lake valley fire department was already on scene and fire department personnel were able to secure the flow of gas utilizing the valve on the riser (stopcock). Southwest gas personnel on scene conducted a leak survey and found no indication of below ground natural gas reads. Once the fire was extinguished, a failure was discovered on a 3/4" steel nipple just above the stopcock. The apparent cause of the damage to the meter set assembly was snow load, but the cause of that loading is under investigation. A supplemental report will be provided when that investigation is complete. Supplement: the incident occurred during an extreme weather event with excessive snow. The cause of the failure of the pipe nipple was the application of up to four successive dynamic loadings of snow and/or ice falling onto the pipe nipple from the roof of the residence. The snow and/or ice was either "natural force damage," "other outside force damage," or a combination of both. The precise cause or causes cannot be determined due to the loss of evidence caused by the fire and the fire-fighting efforts. |
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