Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2018-02-23 — TX
Operator
Atmos Energy Corporation - Mid-Tex
Cause
Miscellaneous Root Causes
Commodity
Natural Gas
Program
GD
Damage and Injuries
1 fatality
0 injuries
Property damage (nominal)
$13,835
Incident datetime
2018-02-23 06:42
Report number
Location
TX, DALLAS
Narrative
On 2/23/2018, a natural gas explosion occurred at 3534 espanola drive, dallas, texas at 6:38 a.M. Multiple 911 calls came into the dallas fire-rescue dispatch center reporting the explosion. Five family members were in the house at the time of the accident. One resident's injuries were fatal. The other four residents sustained non-life-threatening injuries. At the time of the explosion, atmos personnel were in the area working to repair a non-hazardous leak in the 3500 block of espanola. An atmos operations supervisor heard the explosion and took immediate action to protect lives and make the area safe. He directed his crew to start evacuating a two-block area, north and south of the accident house. Firefighters and atmos crews went door-to-door advising residents to evacuate and to refrain from starting cars or switching on lights. The evacuation was completed in 12-15 minutes with the assistance of dallas fire-rescue. The atmos onsite operations supervisor, working with the operations manager and the director of operations, coordinated the shut-down of the main line in the alley behind 3534 espanola. The national transportation safety board (ntsb) arrived onsite on 2/25/2018. Atmos energy, the texas railroad commission (rrc), pipeline & hazardous materials safety administration (PHMSA), and dallas fire - rescue assisted with the ntsb's investigation. The probable cause of the explosion at 3534 espanola drive was the ignition of an accumulation of natural gas that leaked from the gas main that was damaged during a sewer replacement project 23 years earlier. Post-accident excavation confirmed the 2" main was cracked in the area it had been gouged, bent, and dented by mechanized equipment. The third-party damage was never reported to atmos.
Detailed record list
Occurred At
2018-02-23 06:42:00
Year
2018
Report Received Date
2018-03-23 00:00:00
Iyear
2018.0
Report Number
20180034.0
Supplemental Number
35120.0
Report Type
Supplemental Final
Operator Id
31348
Name
Atmos Energy Corporation - Mid-Tex
Operator Street Address
5420 Lbj Freeway Suite 1800
Operator City Name
Dallas
Operator State Abbreviation
TX
Operator Postal Code
75240
Local Datetime
2018-02-23 06:38:00
Time Zone
Central
Daylight Savings Ind
No
Location Street Address
3534 Espanola Dr.
Location City Name
Dallas
Location County Name
Dallas
Location State Abbreviation
TX
Location Postal Code
75220
Location Latitude
32.868106
Location Longitude
-96.859732
Flow Cont Main Valve Ind
Yes
Nrc Rpt Datetime
2018-02-23 07:34:00
Nrc Rpt Num
1205026
Additional Nrc Report Numbers
1205177
Commodity Released Type
Natural Gas
Unintentional Release
1.14
Intentional Release
0.04
Fatality Ind
Yes
Num Emp Fatalities
0
Num Contr Fatalities
0
Num Er Fatalities
0
Num Worker Fatalities
0
Num Gp Fatalities
1
Fatal
1
Injury Ind
No
Injure
0
Ignite Ind
Yes
Ignite Datetime
2018-02-23 06:38:00
How Extinguished
Other
How Extinguished Other Detail
A Fire Did Not Occur, And We Are Unable To Accurately Estimate Volume Of Gas Consumed By The Fire.
Gas Consumed By Fire In Mcf
1
Explode Ind
Yes
Num Pub Evacuated
42.0
Incident Identified Datetime
2018-02-23 06:42:00
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Initial Responder Com Datetime
2018-02-23 06:42:00
On Site Datetime
2018-02-23 06:42:00
Federal
No
Location Type
Private Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
48.0
Other Underground Facilities
Yes
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Main
Installation Year
1946.0
Pipe Diameter
2.0
Pipe Specification
Api 5l
Pipe Manufacturer
Unknown
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown
Wt Steel
0.15
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 3 Location
Est Cost Oper Paid
199000.0
Est Cost Prop Damage
13835.0
Est Cost Emergency
1353.0
Est Cost Other
0.0
Gas Cost In Mcf
7.19
Est Cost Unintentional Release
8.0
Est Cost Intentional Release
0.0
Prpty
214196.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
42.0
Num Persons Hosp Not Ovnght
4.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
42.0
Num Business Building Affctd
0.0
Accident Psig
25.0
Normal Psig
25.0
Mop Psig
55.0
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1946-01-01 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Injection Pump
Gas Odorized Level
5
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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
No abnormal changes in pressure
Employee Drug Test Ind
Yes
Num Employees Tested
31
Num Employees Failed
0
Contractor Drug Test Ind
Yes
Num Contractors Tested
12
Num Contractors Failed
0
Cause
Excavation Damage
Cause Details
Previous Damage Due To Excavation Activity
Ex Party Type
Previous Damage Due To Excavation Activity
Ex Hydrotest Leak Survey Date
2017-03-07 00:00:00
Ex Hydrotest Conducted Ind
No
Notify Cga Dirt
No
Public Row Ind
Yes
Public Subtype
Other
Excavator Type
Municipality
Excavator Equipment
Backhoe/trackhoe
Work Performed
Sewer (Sanitary/storm)
One Call Notified Ind
No
Service Interruption
Data Not Collected
Root Cause Category
Miscellaneous Root Causes
Root Cause Type
Previous Damage
Preparer Name
B*** B*****
Preparer Title
Director Regulatory And Compliance
Preparer Email
B**********@a**********.com
Preparer Telephone
806-787-9422
Local Contact Name
T**** L*****
Local Contact Email
T***********@a**********.com
Local Contact Telephone
469-261-7387
Authorizer Name
M**** S*****
Authorizer Title
Vice President Technical Services
Authorizer Telephone
214-206-2033
Authorizer Email
M***********@a**********.com
Narrative
On 2/23/2018, a natural gas explosion occurred at 3534 espanola drive, dallas, texas at 6:38 a.M. Multiple 911 calls came into the dallas fire-rescue dispatch center reporting the explosion. Five family members were in the house at the time of the accident. One resident's injuries were fatal. The other four residents sustained non-life-threatening injuries. At the time of the explosion, atmos personnel were in the area working to repair a non-hazardous leak in the 3500 block of espanola. An atmos operations supervisor heard the explosion and took immediate action to protect lives and make the area safe. He directed his crew to start evacuating a two-block area, north and south of the accident house. Firefighters and atmos crews went door-to-door advising residents to evacuate and to refrain from starting cars or switching on lights. The evacuation was completed in 12-15 minutes with the assistance of dallas fire-rescue. The atmos onsite operations supervisor, working with the operations manager and the director of operations, coordinated the shut-down of the main line in the alley behind 3534 espanola. The national transportation safety board (ntsb) arrived onsite on 2/25/2018. Atmos energy, the texas railroad commission (rrc), pipeline & hazardous materials safety administration (PHMSA), and dallas fire - rescue assisted with the ntsb's investigation. The probable cause of the explosion at 3534 espanola drive was the ignition of an accumulation of natural gas that leaked from the gas main that was damaged during a sewer replacement project 23 years earlier. Post-accident excavation confirmed the 2" main was cracked in the area it had been gouged, bent, and dented by mechanized equipment. The third-party damage was never reported to atmos.
| Occurred At | 2018-02-23 06:42:00 |
|---|---|
| Year | 2018 |
| Report Received Date | 2018-03-23 00:00:00 |
| Iyear | 2018.0 |
| Report Number | 20180034.0 |
| Supplemental Number | 35120.0 |
| Report Type | Supplemental Final |
| Operator Id | 31348 PHMSA Enforcement |
| Name | Atmos Energy Corporation - Mid-Tex |
| Operator Street Address | 5420 Lbj Freeway Suite 1800 |
| Operator City Name | Dallas |
| Operator State Abbreviation | TX |
| Operator Postal Code | 75240 |
| Local Datetime | 2018-02-23 06:38:00 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Street Address | 3534 Espanola Dr. |
| Location City Name | Dallas |
| Location County Name | Dallas |
| Location State Abbreviation | TX |
| Location Postal Code | 75220 |
| Location Latitude | 32.868106 Google Maps OpenStreetMap |
| Location Longitude | -96.859732 Google Maps OpenStreetMap |
| Flow Cont Main Valve Ind | Yes |
| Nrc Rpt Datetime | 2018-02-23 07:34:00 |
| Nrc Rpt Num | 1205026 NRC Report How to search |
| Additional Nrc Report Numbers | 1205177 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1.14 |
| Intentional Release | 0.04 |
| Fatality Ind | Yes |
| Num Emp Fatalities | 0 |
| Num Contr Fatalities | 0 |
| Num Er Fatalities | 0 |
| Num Worker Fatalities | 0 |
| Num Gp Fatalities | 1 |
| Fatal | 1 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | Yes |
| Ignite Datetime | 2018-02-23 06:38:00 |
| How Extinguished | Other |
| How Extinguished Other Detail | A Fire Did Not Occur, And We Are Unable To Accurately Estimate Volume Of Gas Consumed By The Fire. |
| Gas Consumed By Fire In Mcf | 1 |
| Explode Ind | Yes |
| Num Pub Evacuated | 42.0 |
| Incident Identified Datetime | 2018-02-23 06:42:00 |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Initial Responder Com Datetime | 2018-02-23 06:42:00 |
| On Site Datetime | 2018-02-23 06:42:00 |
| Federal | No |
| Location Type | Private Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 48.0 |
| Other Underground Facilities | Yes |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Installation Year | 1946.0 |
| Pipe Diameter | 2.0 |
| Pipe Specification | Api 5l |
| Pipe Manufacturer | Unknown |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown |
| Wt Steel | 0.15 |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 199000.0 |
| Est Cost Prop Damage | 13835.0 |
| Est Cost Emergency | 1353.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 7.19 |
| Est Cost Unintentional Release | 8.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 214196.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 42.0 |
| Num Persons Hosp Not Ovnght | 4.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 42.0 |
| Num Business Building Affctd | 0.0 |
| Accident Psig | 25.0 |
| Normal Psig | 25.0 |
| Mop Psig | 55.0 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1946-01-01 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Injection Pump |
| Gas Odorized Level | 5 |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| 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 | No abnormal changes in pressure |
| Employee Drug Test Ind | Yes |
| Num Employees Tested | 31 |
| Num Employees Failed | 0 |
| Contractor Drug Test Ind | Yes |
| Num Contractors Tested | 12 |
| Num Contractors Failed | 0 |
| Cause | Excavation Damage |
| Cause Details | Previous Damage Due To Excavation Activity |
| Ex Party Type | Previous Damage Due To Excavation Activity |
| Ex Hydrotest Leak Survey Date | 2017-03-07 00:00:00 |
| Ex Hydrotest Conducted Ind | No |
| Notify Cga Dirt | No |
| Public Row Ind | Yes |
| Public Subtype | Other |
| Excavator Type | Municipality |
| Excavator Equipment | Backhoe/trackhoe |
| Work Performed | Sewer (Sanitary/storm) |
| One Call Notified Ind | No |
| Service Interruption | Data Not Collected |
| Root Cause Category | Miscellaneous Root Causes |
| Root Cause Type | Previous Damage |
| Preparer Name | B*** B***** |
| Preparer Title | Director Regulatory And Compliance |
| Preparer Email | B**********@a**********.com |
| Preparer Telephone | 806-787-9422 |
| Local Contact Name | T**** L***** |
| Local Contact Email | T***********@a**********.com |
| Local Contact Telephone | 469-261-7387 |
| Authorizer Name | M**** S***** |
| Authorizer Title | Vice President Technical Services |
| Authorizer Telephone | 214-206-2033 |
| Authorizer Email | M***********@a**********.com |
| Narrative | On 2/23/2018, a natural gas explosion occurred at 3534 espanola drive, dallas, texas at 6:38 a.M. Multiple 911 calls came into the dallas fire-rescue dispatch center reporting the explosion. Five family members were in the house at the time of the accident. One resident's injuries were fatal. The other four residents sustained non-life-threatening injuries. At the time of the explosion, atmos personnel were in the area working to repair a non-hazardous leak in the 3500 block of espanola. An atmos operations supervisor heard the explosion and took immediate action to protect lives and make the area safe. He directed his crew to start evacuating a two-block area, north and south of the accident house. Firefighters and atmos crews went door-to-door advising residents to evacuate and to refrain from starting cars or switching on lights. The evacuation was completed in 12-15 minutes with the assistance of dallas fire-rescue. The atmos onsite operations supervisor, working with the operations manager and the director of operations, coordinated the shut-down of the main line in the alley behind 3534 espanola. The national transportation safety board (ntsb) arrived onsite on 2/25/2018. Atmos energy, the texas railroad commission (rrc), pipeline & hazardous materials safety administration (PHMSA), and dallas fire - rescue assisted with the ntsb's investigation. The probable cause of the explosion at 3534 espanola drive was the ignition of an accumulation of natural gas that leaked from the gas main that was damaged during a sewer replacement project 23 years earlier. Post-accident excavation confirmed the 2" main was cracked in the area it had been gouged, bent, and dented by mechanized equipment. The third-party damage was never reported to atmos. |
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