Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2021-02-28 — AZ
Operator
Southwest Gas Corp
Cause
Other Outside Force Damage
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$2,098,109
Incident datetime
2021-02-28 04:50
Report number
Location
AZ, MARICOPA
Narrative
Pl c1-pl2021-0007 on february 28, 2021 at 04:16 southwest gas corporation (swg) was notified by the phoenix fire department of a release of gas and fire at the 7th street bridge located south of university drive in phoenix. Swg crews responded to find a natural gas fed fire engulfing the bridge. A 10-inch steel pipeline (maop 275 psig) is suspended under the bridge that crosses the salt river. Swg controlled the flow of gas by utilizing valves that resulted in an outage of six commercial accounts (five active, one inactive). There were no injuries or fatalities as a result of this incident. Notification was made to PHMSA via the national response center (nrc) on february 28, 2021 at 6:42 and was given nrc report #1299214. An update was provided to the nrc on march 1, 2021 at 19:05 and was given nrc report #1299368. Chemical safety and hazard investigation board was notified on march 1, 2021 at 10:38 when it was determined that property damage may exceed $1,000,000. No report number was given. Investigation into the cause is still ongoing, and a supplemental report will be submitted upon completion of the investigation by swg. Supplemental report: the report was updated to reflect an apparent cause of the incident. Part g - apparent cause was changed from g8 "other incident cause" - unknown, to g4 - other outside force damage, intentional damage, theft of equipment. The incident investigation is still ongoing, and a supplemental report will be submitted upon completion of the investigation by southwest gas corporation. Supplemental report 2: the report was updated to reflect revised estimated costs. In part d #2, estimated costs were revised. 2.A. Estimated costs of public and non-operator private property damage was revised to $8,767,645, 2.B. Estimated cost of operator's property damage & repairs was revised to $2,098,109, and 2.E. Total estimated property damage was revised to $10,864,754. The incident investigation is still ongoing pending the release of the failed components, and a supplemental report will be submitted upon completion of the investigation by southwest gas corporation. Supplemental report 3: southwest gas corporation's investigation determined that the incident was caused by the removal of fasteners from a flanged joint by an unknown person. The report was updated to reflect type of release involved. In part c #5, other was changed to "intentional damage - removal of flange fasteners by unknown person".
Detailed record list
Occurred At
2021-02-28 04:50:00
Year
2021
Report Received Date
2021-03-28 00:00:00
Iyear
2021.0
Report Number
20210036.0
Supplemental Number
39564.0
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
2021-02-28 04:16:00
Time Zone
Mountain
Daylight Savings Ind
No
Location Street Address
7th Street & University Drive
Location City Name
Phoenix
Location County Name
Maricopa
Location State Abbreviation
AZ
Location Postal Code
85034
Location Latitude
33.42151
Location Longitude
-112.06494
Flow Cont Key Crit Ind
Yes
Nrc Rpt Datetime
2021-02-28 06:42:00
Nrc Rpt Num
1299214
Additional Nrc Report Numbers
1299368
Commodity Released Type
Natural Gas
Unintentional Release
4614.0
Intentional Release
0.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
Yes
Ignite Datetime
2021-02-28 04:16:00
How Extinguished
Allowed To Burn Out
Gas Consumed By Fire In Mcf
4614
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2021-02-28 04:50:00
On Site Datetime
2021-02-28 04:50:00
Confirmed Discovery Datetime
2021-02-28 06:00:00
Federal
No
Location Type
Utility Right-Of-Way / Easement
Incident Area Type
Aboveground
Incident Area Subtype
Overhead Crossing
Crossing
Yes
Bridge Crossing Ind
Yes
Bridge Type
Uncased
Pipe Facility Type
Investor Owned
System Part Involved
Main
Installation Year
1984.0
Pipe Diameter
10.0
Pipe Specification
Grade B
Pipe Manufacturer
Unknown
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown
Wt Steel
0.365
Release Type
Other
Release Type Details
Intentional Damage - Removal Of Flange Fasteners By Unknown Person.
Class Location Type
Class 3 Location
Est Cost Oper Paid
8764645.0
Est Cost Prop Damage
2098109.0
Est Cost Emergency
5000.0
Est Cost Other
0.0
Gas Cost In Mcf
2.4541
Est Cost Unintentional Release
11323.0
Est Cost Intentional Release
0.0
Prpty
10879077.0
Commercial Affected
6.0
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
6.0
Accident Psig
270.0
Normal Psig
270.0
Mop Psig
275.0
Mop Cfr Section
192.619(A)(4)
Maop Established Date
1986-11-12 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Drip
Gas Odorized Level
0.3
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
Pressure and flow change was not sufficient to signal scada alarms.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Outside Force Damage
Cause Details
Intentional Damage
Outside Force Type
Intentional Damage
Intentional Subtype
Theft Of Equipment
Preparer Name
S**** B****
Preparer Title
Administrator Division Compliance
Preparer Email
S**********@s****.com
Preparer Telephone
602-484-5489
Preparer Fax
602-484-5322
Local Contact Name
S**** B****
Local Contact Email
S**********@s****.com
Local Contact Telephone
602-484-5489
Authorizer Name
R***** M****
Authorizer Title
Director Central Support
Authorizer Telephone
602-484-5367
Authorizer Email
R***********@s****.com
Narrative
Pl c1-pl2021-0007 on february 28, 2021 at 04:16 southwest gas corporation (swg) was notified by the phoenix fire department of a release of gas and fire at the 7th street bridge located south of university drive in phoenix. Swg crews responded to find a natural gas fed fire engulfing the bridge. A 10-inch steel pipeline (maop 275 psig) is suspended under the bridge that crosses the salt river. Swg controlled the flow of gas by utilizing valves that resulted in an outage of six commercial accounts (five active, one inactive). There were no injuries or fatalities as a result of this incident. Notification was made to PHMSA via the national response center (nrc) on february 28, 2021 at 6:42 and was given nrc report #1299214. An update was provided to the nrc on march 1, 2021 at 19:05 and was given nrc report #1299368. Chemical safety and hazard investigation board was notified on march 1, 2021 at 10:38 when it was determined that property damage may exceed $1,000,000. No report number was given. Investigation into the cause is still ongoing, and a supplemental report will be submitted upon completion of the investigation by swg. Supplemental report: the report was updated to reflect an apparent cause of the incident. Part g - apparent cause was changed from g8 "other incident cause" - unknown, to g4 - other outside force damage, intentional damage, theft of equipment. The incident investigation is still ongoing, and a supplemental report will be submitted upon completion of the investigation by southwest gas corporation. Supplemental report 2: the report was updated to reflect revised estimated costs. In part d #2, estimated costs were revised. 2.A. Estimated costs of public and non-operator private property damage was revised to $8,767,645, 2.B. Estimated cost of operator's property damage & repairs was revised to $2,098,109, and 2.E. Total estimated property damage was revised to $10,864,754. The incident investigation is still ongoing pending the release of the failed components, and a supplemental report will be submitted upon completion of the investigation by southwest gas corporation. Supplemental report 3: southwest gas corporation's investigation determined that the incident was caused by the removal of fasteners from a flanged joint by an unknown person. The report was updated to reflect type of release involved. In part c #5, other was changed to "intentional damage - removal of flange fasteners by unknown person".
| Occurred At | 2021-02-28 04:50:00 |
|---|---|
| Year | 2021 |
| Report Received Date | 2021-03-28 00:00:00 |
| Iyear | 2021.0 |
| Report Number | 20210036.0 |
| Supplemental Number | 39564.0 |
| 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 | 2021-02-28 04:16:00 |
| Time Zone | Mountain |
| Daylight Savings Ind | No |
| Location Street Address | 7th Street & University Drive |
| Location City Name | Phoenix |
| Location County Name | Maricopa |
| Location State Abbreviation | AZ |
| Location Postal Code | 85034 |
| Location Latitude | 33.42151 Google Maps OpenStreetMap |
| Location Longitude | -112.06494 Google Maps OpenStreetMap |
| Flow Cont Key Crit Ind | Yes |
| Nrc Rpt Datetime | 2021-02-28 06:42:00 |
| Nrc Rpt Num | 1299214 NRC Report How to search |
| Additional Nrc Report Numbers | 1299368 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4614.0 |
| Intentional Release | 0.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | Yes |
| Ignite Datetime | 2021-02-28 04:16:00 |
| How Extinguished | Allowed To Burn Out |
| Gas Consumed By Fire In Mcf | 4614 |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2021-02-28 04:50:00 |
| On Site Datetime | 2021-02-28 04:50:00 |
| Confirmed Discovery Datetime | 2021-02-28 06:00:00 |
| Federal | No |
| Location Type | Utility Right-Of-Way / Easement |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Overhead Crossing |
| Crossing | Yes |
| Bridge Crossing Ind | Yes |
| Bridge Type | Uncased |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Installation Year | 1984.0 |
| Pipe Diameter | 10.0 |
| Pipe Specification | Grade B |
| Pipe Manufacturer | Unknown |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown |
| Wt Steel | 0.365 |
| Release Type | Other |
| Release Type Details | Intentional Damage - Removal Of Flange Fasteners By Unknown Person. |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 8764645.0 |
| Est Cost Prop Damage | 2098109.0 |
| Est Cost Emergency | 5000.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 2.4541 |
| Est Cost Unintentional Release | 11323.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 10879077.0 |
| Commercial Affected | 6.0 |
| 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 | 6.0 |
| Accident Psig | 270.0 |
| Normal Psig | 270.0 |
| Mop Psig | 275.0 |
| Mop Cfr Section | 192.619(A)(4) View CFR 49 §192 |
| Maop Established Date | 1986-11-12 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Drip |
| Gas Odorized Level | 0.3 |
| 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 | Pressure and flow change was not sufficient to signal scada alarms. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Outside Force Damage |
| Cause Details | Intentional Damage |
| Outside Force Type | Intentional Damage |
| Intentional Subtype | Theft Of Equipment |
| Preparer Name | S**** B**** |
| Preparer Title | Administrator Division Compliance |
| Preparer Email | S**********@s****.com |
| Preparer Telephone | 602-484-5489 |
| Preparer Fax | 602-484-5322 |
| Local Contact Name | S**** B**** |
| Local Contact Email | S**********@s****.com |
| Local Contact Telephone | 602-484-5489 |
| Authorizer Name | R***** M**** |
| Authorizer Title | Director Central Support |
| Authorizer Telephone | 602-484-5367 |
| Authorizer Email | R***********@s****.com |
| Narrative | Pl c1-pl2021-0007 on february 28, 2021 at 04:16 southwest gas corporation (swg) was notified by the phoenix fire department of a release of gas and fire at the 7th street bridge located south of university drive in phoenix. Swg crews responded to find a natural gas fed fire engulfing the bridge. A 10-inch steel pipeline (maop 275 psig) is suspended under the bridge that crosses the salt river. Swg controlled the flow of gas by utilizing valves that resulted in an outage of six commercial accounts (five active, one inactive). There were no injuries or fatalities as a result of this incident. Notification was made to PHMSA via the national response center (nrc) on february 28, 2021 at 6:42 and was given nrc report #1299214. An update was provided to the nrc on march 1, 2021 at 19:05 and was given nrc report #1299368. Chemical safety and hazard investigation board was notified on march 1, 2021 at 10:38 when it was determined that property damage may exceed $1,000,000. No report number was given. Investigation into the cause is still ongoing, and a supplemental report will be submitted upon completion of the investigation by swg. Supplemental report: the report was updated to reflect an apparent cause of the incident. Part g - apparent cause was changed from g8 "other incident cause" - unknown, to g4 - other outside force damage, intentional damage, theft of equipment. The incident investigation is still ongoing, and a supplemental report will be submitted upon completion of the investigation by southwest gas corporation. Supplemental report 2: the report was updated to reflect revised estimated costs. In part d #2, estimated costs were revised. 2.A. Estimated costs of public and non-operator private property damage was revised to $8,767,645, 2.B. Estimated cost of operator's property damage & repairs was revised to $2,098,109, and 2.E. Total estimated property damage was revised to $10,864,754. The incident investigation is still ongoing pending the release of the failed components, and a supplemental report will be submitted upon completion of the investigation by southwest gas corporation. Supplemental report 3: southwest gas corporation's investigation determined that the incident was caused by the removal of fasteners from a flanged joint by an unknown person. The report was updated to reflect type of release involved. In part c #5, other was changed to "intentional damage - removal of flange fasteners by unknown person". |
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