Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2024-08-15 — TX
Operator
Centerpoint Energy Resources Corporation
Cause
Locating Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$16,335
Incident datetime
2024-08-15 00:00 UTC
Report number
Location
TX, WILSON
Narrative
On july 16th, 2024, c4 unlimited was performing boring excavation activities to install telecommunications conduit for rise broadband in the 1600 block of h st. In floresville, texas. At 11:30am, centerpoint energy responded to a leak odor call at 1705 10th st. No gas leak on the property was detected by the technician; however, odor was detected. The centerpoint energy technician began investigating the vicinity for leaks. At 11:45am, the centerpoint energy tech was flagged down by contract locator representative and notified of possible damage to centerpoint energy's gas line in the 1600 block of h st. By c4 unlimited. C4 unlimited did not report the possible damage to centerpoint energy. The centerpoint energy technician detected gas venting out of the ground at multiple locations along h st. The technician then began to check the sewer lateral at 1601 h st. And identified gas blowing. This prompted the technician to determine whether evacuations were necessary at this location and east of 1601 h st., in the direction of the possible bore path, as well as request additional resources from centerpoint energy. At 12:00pm additional centerpoint energy resources arrived to assist with identifying the extent of the gas leak, opening sewer lateral clean outs to vent out gas from sewer system, as well as ensuring evacuations from the 1600 block of h st. It was later determined that the structures were previously evacuated by the floresville fire department. After evacuations were confirmed, the centerpoint energy construction crew established the damage location area and remote isolation point. At 2:00pm, while the construction crew was excavating at the isolation point, the main structure at 1605 h st. Exploded. The crew continued excavating the gas line and squeezed off the 2" plastic main at 2:05pm. After the incident, it was determined that the contract locator incorrectly located and marked the 2" plastic main, which the excavator c4 unlimited had damaged in several locations.
Detailed record list
Report Received Date
2024-08-15 00:00:00
Iyear
2024.0
Report Number
20240043.0
Supplemental Number
40969.0
Report Type
Supplemental Final
Operator Id
4499
Name
Centerpoint Energy Resources Corporation
Operator Street Address
1111 Louisiana St
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002.0
Time Zone
Central
Daylight Savings Ind
Yes
Location Street Address
1605 H St
Location City Name
Floresville
Location County Name
Wilson
Location State Abbreviation
TX
Location Postal Code
78114.0
Location Latitude
29.13353
Location Longitude
-98.14761
Flow Cont Squeeze Off Ind
Yes
Nrc Rpt Num
1404974.0
Additional Nrc Report Numbers
1405079.0
Commodity Released Type
Natural Gas
Unintentional Release
51.51
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
51.51
Explode Ind
Yes
Num Pub Evacuated
5.0
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 Soil
Depth Of Cover
42.0
Other Underground Facilities
Yes
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Main
Installation Year
2021.0
Manufactured Year
2021.0
Pipe Diameter
2.0
Pipe Specification
Astm 2406/2708
Pipe Manufacturer
Duraline
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Plastic Sdr
11
Material Pe Pipe Code
2406
Release Type
Mechanical Puncture
Puncture Axial
1.0
Puncture Circum
1.0
Class Location Type
Class 3 Location
Est Cost Oper Paid
500000.0
Est Cost Prop Damage
16335.0
Est Cost Emergency
180.0
Est Cost Other
0.0
Gas Cost In Mcf
9.73
Est Cost Unintentional Release
501.0
Est Cost Intentional Release
0.0
Prpty
517016.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
2.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
3.0
Num Business Building Affctd
0.0
Accident Psig
30.0
Normal Psig
30.0
Mop Psig
60.0
Mop Cfr Section
192.619(A)(1)
Maop Established Date
2021-06-29 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
By-Pass
Gas Odorized Level
0.5
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Ground Patrol By Operator Or Its Contractor
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
Failure did not exceed the detection threshold of the system.
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
Yes
Public Row Ind
Yes
Public Subtype
City Street
Public Util Easement Row Ind
Yes
Joint Trench Ind
No
Cross Bore Ind
No
Depth Of Grade
> 36�
Excavator Type
Utility
Excavator Equipment
Directional Drilling
Work Performed
Telecommunications
One Call Notified Ind
Yes
One Call Ticket Num
2469288723.0
One Call Center Name
Texas 811
White Lined Ind
No
Locator Type
Contract Locator
Visible Marks
Yes
Service Interruption
Unknown/other
Root Cause Category
Locating Issue
Root Cause Type
Facility Marked Inaccurately Due To Locator Error
Preparer Name
E**** S******
Preparer Title
Operations Specialist
Preparer Email
E************@c****************.com
Preparer Telephone
281-755-2470
Local Contact Name
E**** S******
Local Contact Email
Operations Specialist
Local Contact Telephone
281-755-2470
Authorizer Name
P****** G****
Authorizer Title
Manager Gas Compliance
Authorizer Telephone
713-378-9845
Authorizer Email
P************@c****************.com
Narrative
On july 16th, 2024, c4 unlimited was performing boring excavation activities to install telecommunications conduit for rise broadband in the 1600 block of h st. In floresville, texas. At 11:30am, centerpoint energy responded to a leak odor call at 1705 10th st. No gas leak on the property was detected by the technician; however, odor was detected. The centerpoint energy technician began investigating the vicinity for leaks. At 11:45am, the centerpoint energy tech was flagged down by contract locator representative and notified of possible damage to centerpoint energy's gas line in the 1600 block of h st. By c4 unlimited. C4 unlimited did not report the possible damage to centerpoint energy. The centerpoint energy technician detected gas venting out of the ground at multiple locations along h st. The technician then began to check the sewer lateral at 1601 h st. And identified gas blowing. This prompted the technician to determine whether evacuations were necessary at this location and east of 1601 h st., in the direction of the possible bore path, as well as request additional resources from centerpoint energy. At 12:00pm additional centerpoint energy resources arrived to assist with identifying the extent of the gas leak, opening sewer lateral clean outs to vent out gas from sewer system, as well as ensuring evacuations from the 1600 block of h st. It was later determined that the structures were previously evacuated by the floresville fire department. After evacuations were confirmed, the centerpoint energy construction crew established the damage location area and remote isolation point. At 2:00pm, while the construction crew was excavating at the isolation point, the main structure at 1605 h st. Exploded. The crew continued excavating the gas line and squeezed off the 2" plastic main at 2:05pm. After the incident, it was determined that the contract locator incorrectly located and marked the 2" plastic main, which the excavator c4 unlimited had damaged in several locations.
| Report Received Date | 2024-08-15 00:00:00 |
|---|---|
| Iyear | 2024.0 |
| Report Number | 20240043.0 |
| Supplemental Number | 40969.0 |
| Report Type | Supplemental Final |
| Operator Id | 4499 PHMSA Enforcement |
| Name | Centerpoint Energy Resources Corporation |
| Operator Street Address | 1111 Louisiana St |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002.0 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Street Address | 1605 H St |
| Location City Name | Floresville |
| Location County Name | Wilson |
| Location State Abbreviation | TX |
| Location Postal Code | 78114.0 |
| Location Latitude | 29.13353 Google Maps OpenStreetMap |
| Location Longitude | -98.14761 Google Maps OpenStreetMap |
| Flow Cont Squeeze Off Ind | Yes |
| Nrc Rpt Num | 1404974.0 NRC Report How to search |
| Additional Nrc Report Numbers | 1405079.0 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 51.51 |
| 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 | 51.51 |
| Explode Ind | Yes |
| Num Pub Evacuated | 5.0 |
| 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 Soil |
| Depth Of Cover | 42.0 |
| Other Underground Facilities | Yes |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Installation Year | 2021.0 |
| Manufactured Year | 2021.0 |
| Pipe Diameter | 2.0 |
| Pipe Specification | Astm 2406/2708 |
| Pipe Manufacturer | Duraline |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Plastic Sdr | 11 |
| Material Pe Pipe Code | 2406 |
| Release Type | Mechanical Puncture |
| Puncture Axial | 1.0 |
| Puncture Circum | 1.0 |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 500000.0 |
| Est Cost Prop Damage | 16335.0 |
| Est Cost Emergency | 180.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 9.73 |
| Est Cost Unintentional Release | 501.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 517016.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 2.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 3.0 |
| Num Business Building Affctd | 0.0 |
| Accident Psig | 30.0 |
| Normal Psig | 30.0 |
| Mop Psig | 60.0 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 2021-06-29 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | By-Pass |
| Gas Odorized Level | 0.5 |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Ground Patrol By Operator Or Its Contractor |
| 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 | Failure did not exceed the detection threshold of the system. |
| 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 | Yes |
| Public Row Ind | Yes |
| Public Subtype | City Street |
| Public Util Easement Row Ind | Yes |
| Joint Trench Ind | No |
| Cross Bore Ind | No |
| Depth Of Grade | > 36� |
| Excavator Type | Utility |
| Excavator Equipment | Directional Drilling |
| Work Performed | Telecommunications |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 2469288723.0 |
| One Call Center Name | Texas 811 |
| White Lined Ind | No |
| Locator Type | Contract Locator |
| Visible Marks | Yes |
| Service Interruption | Unknown/other |
| Root Cause Category | Locating Issue |
| Root Cause Type | Facility Marked Inaccurately Due To Locator Error |
| Preparer Name | E**** S****** |
| Preparer Title | Operations Specialist |
| Preparer Email | E************@c****************.com |
| Preparer Telephone | 281-755-2470 |
| Local Contact Name | E**** S****** |
| Local Contact Email | Operations Specialist |
| Local Contact Telephone | 281-755-2470 |
| Authorizer Name | P****** G**** |
| Authorizer Title | Manager Gas Compliance |
| Authorizer Telephone | 713-378-9845 |
| Authorizer Email | P************@c****************.com |
| Narrative | On july 16th, 2024, c4 unlimited was performing boring excavation activities to install telecommunications conduit for rise broadband in the 1600 block of h st. In floresville, texas. At 11:30am, centerpoint energy responded to a leak odor call at 1705 10th st. No gas leak on the property was detected by the technician; however, odor was detected. The centerpoint energy technician began investigating the vicinity for leaks. At 11:45am, the centerpoint energy tech was flagged down by contract locator representative and notified of possible damage to centerpoint energy's gas line in the 1600 block of h st. By c4 unlimited. C4 unlimited did not report the possible damage to centerpoint energy. The centerpoint energy technician detected gas venting out of the ground at multiple locations along h st. The technician then began to check the sewer lateral at 1601 h st. And identified gas blowing. This prompted the technician to determine whether evacuations were necessary at this location and east of 1601 h st., in the direction of the possible bore path, as well as request additional resources from centerpoint energy. At 12:00pm additional centerpoint energy resources arrived to assist with identifying the extent of the gas leak, opening sewer lateral clean outs to vent out gas from sewer system, as well as ensuring evacuations from the 1600 block of h st. It was later determined that the structures were previously evacuated by the floresville fire department. After evacuations were confirmed, the centerpoint energy construction crew established the damage location area and remote isolation point. At 2:00pm, while the construction crew was excavating at the isolation point, the main structure at 1605 h st. Exploded. The crew continued excavating the gas line and squeezed off the 2" plastic main at 2:05pm. After the incident, it was determined that the contract locator incorrectly located and marked the 2" plastic main, which the excavator c4 unlimited had damaged in several locations. |
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