Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2010-04-29 — AL
Operator
Mobile Gas Service Corp
Cause
Other Outside Force Damage
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
1 injury
Property damage (nominal)
$0
Incident datetime
2010-04-29 17:09
Report number
Location
AL, MOBILE
Narrative
On 4/29/2010, a subcontractor for at&t entered an at&t manhole located at moffett road and shelton beach road, in mobile, alabama, while smoking a cigarette. It is our belief that the at&t subcontractor did not follow proper at&t procedures for airing out the confined space and extinguishing his cigarette before entering. Once the subcontractor had entered, a flammable substance in the manhole ignited and burned the subcontractor, requiring medical treatment. The investigation determined that natural gas may have migrated from an nearby leak and possibly collected in the manhole. The 4" cast iron main in the vicinity of the manhole was removed and sent to a lab for testing and inspection. The tests discovered a crack in the pipe approximately a half-block away from the manhole. The crack was likely caused by excessive external loading from passing vehicles. While the type of flammable substance could not be confirmed, it is presumed that the incident was caused by leaking natural gas from the crack in the pipe that had migrated to and collected in the at&t manhole. .
Detailed record list
Occurred At
2010-04-29 17:09:00
Year
2010
Report Received Date
2010-06-21 00:00:00
Iyear
2010.0
Report Number
20110006.0
Supplemental Number
30953.0
Report Type
Supplemental Final
Operator Id
12642
Name
Mobile Gas Service Corp
Operator Street Address
2828 Dauphin Street
Operator City Name
Mobile
Operator State Abbreviation
AL
Operator Postal Code
36606
Local Datetime
2010-04-29 17:09:00
Location Street Address
4710 Moffett Road
Location City Name
Mobile
Location County Name
Mobile
Location State Abbreviation
AL
Location Postal Code
36618
Location Latitude
30.720014
Location Longitude
-88.15109
Nrc Rpt Datetime
2010-05-05 08:25:00
Nrc Rpt Num
939174
Commodity Released Type
Natural Gas
Unintentional Release
0.5
Fatality Ind
No
Fatal
0
Injury Ind
Yes
Num Emp Injuries
0
Num Contr Injuries
0
Num Er Injuries
0
Num Worker Injuries
1
Num Gp Injuries
0
Injure
1
Ignite Ind
Yes
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2010-04-29 17:09:00
On Site Datetime
2010-04-29 17:15:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
In Underground Enclosed Space (E.g. Vault)
Crossing
No
Pipe Facility Type
Other
Pipe Type Other
Privately Owned Distribution
System Part Involved
Main
Installation Year
1950.0
Pipe Diameter
4.0
Pipe Specification
Unknown
Pipe Manufacturer
Unknown
Material Involved
Cast/wrought Iron
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
0.0
Est Cost Emergency
0.0
Est Cost Other
1000.0
Est Cost Other Details
Removal Of Segment Of Pipe For Testing.
Est Cost Unintentional Release
10.0
Prpty
1010.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
0.0
Accident Psig
40.0
Normal Psig
40.0
Mop Psig
60.0
Accident Pressure
Pressure Did Not Exceed Maop
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
The low volume of gas released would not have been detected on the scada system.
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
Crack Was Likely Caused By Excessive External Weight Of Vehicles Passing Over Or In The Vicinity Of The Pipe.
Preparer Name
S**** S****
Preparer Title
Manager Pipeline Safety Distribution
Preparer Email
S**********@s**********.com
Preparer Telephone
334-207-3090
Authorizer Name
C**** H********
Authorizer Title
Vice President Operations Services
Authorizer Telephone
314-349-2972
Authorizer Email
C**************@s**********.com
Narrative
On 4/29/2010, a subcontractor for at&t entered an at&t manhole located at moffett road and shelton beach road, in mobile, alabama, while smoking a cigarette. It is our belief that the at&t subcontractor did not follow proper at&t procedures for airing out the confined space and extinguishing his cigarette before entering. Once the subcontractor had entered, a flammable substance in the manhole ignited and burned the subcontractor, requiring medical treatment. The investigation determined that natural gas may have migrated from an nearby leak and possibly collected in the manhole. The 4" cast iron main in the vicinity of the manhole was removed and sent to a lab for testing and inspection. The tests discovered a crack in the pipe approximately a half-block away from the manhole. The crack was likely caused by excessive external loading from passing vehicles. While the type of flammable substance could not be confirmed, it is presumed that the incident was caused by leaking natural gas from the crack in the pipe that had migrated to and collected in the at&t manhole. .
| Occurred At | 2010-04-29 17:09:00 |
|---|---|
| Year | 2010 |
| Report Received Date | 2010-06-21 00:00:00 |
| Iyear | 2010.0 |
| Report Number | 20110006.0 |
| Supplemental Number | 30953.0 |
| Report Type | Supplemental Final |
| Operator Id | 12642 PHMSA Enforcement |
| Name | Mobile Gas Service Corp |
| Operator Street Address | 2828 Dauphin Street |
| Operator City Name | Mobile |
| Operator State Abbreviation | AL |
| Operator Postal Code | 36606 |
| Local Datetime | 2010-04-29 17:09:00 |
| Location Street Address | 4710 Moffett Road |
| Location City Name | Mobile |
| Location County Name | Mobile |
| Location State Abbreviation | AL |
| Location Postal Code | 36618 |
| Location Latitude | 30.720014 Google Maps OpenStreetMap |
| Location Longitude | -88.15109 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2010-05-05 08:25:00 |
| Nrc Rpt Num | 939174 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 0.5 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | Yes |
| Num Emp Injuries | 0 |
| Num Contr Injuries | 0 |
| Num Er Injuries | 0 |
| Num Worker Injuries | 1 |
| Num Gp Injuries | 0 |
| Injure | 1 |
| Ignite Ind | Yes |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2010-04-29 17:09:00 |
| On Site Datetime | 2010-04-29 17:15:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | In Underground Enclosed Space (E.g. Vault) |
| Crossing | No |
| Pipe Facility Type | Other |
| Pipe Type Other | Privately Owned Distribution |
| System Part Involved | Main |
| Installation Year | 1950.0 |
| Pipe Diameter | 4.0 |
| Pipe Specification | Unknown |
| Pipe Manufacturer | Unknown |
| Material Involved | Cast/wrought Iron |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 0.0 |
| Est Cost Emergency | 0.0 |
| Est Cost Other | 1000.0 |
| Est Cost Other Details | Removal Of Segment Of Pipe For Testing. |
| Est Cost Unintentional Release | 10.0 |
| Prpty | 1010.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Accident Psig | 40.0 |
| Normal Psig | 40.0 |
| Mop Psig | 60.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| 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 | The low volume of gas released would not have been detected on the scada system. |
| 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 | Crack Was Likely Caused By Excessive External Weight Of Vehicles Passing Over Or In The Vicinity Of The Pipe. |
| Preparer Name | S**** S**** |
| Preparer Title | Manager Pipeline Safety Distribution |
| Preparer Email | S**********@s**********.com |
| Preparer Telephone | 334-207-3090 |
| Authorizer Name | C**** H******** |
| Authorizer Title | Vice President Operations Services |
| Authorizer Telephone | 314-349-2972 |
| Authorizer Email | C**************@s**********.com |
| Narrative | On 4/29/2010, a subcontractor for at&t entered an at&t manhole located at moffett road and shelton beach road, in mobile, alabama, while smoking a cigarette. It is our belief that the at&t subcontractor did not follow proper at&t procedures for airing out the confined space and extinguishing his cigarette before entering. Once the subcontractor had entered, a flammable substance in the manhole ignited and burned the subcontractor, requiring medical treatment. The investigation determined that natural gas may have migrated from an nearby leak and possibly collected in the manhole. The 4" cast iron main in the vicinity of the manhole was removed and sent to a lab for testing and inspection. The tests discovered a crack in the pipe approximately a half-block away from the manhole. The crack was likely caused by excessive external loading from passing vehicles. While the type of flammable substance could not be confirmed, it is presumed that the incident was caused by leaking natural gas from the crack in the pipe that had migrated to and collected in the at&t manhole. . |
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