Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2025-07-31 — TX
Operator
Colorado Interstate Gas Co
Cause
Incorrect Operation
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
1 injury
Property damage (nominal)
$1,000,000
Incident datetime
2025-07-31 11:07
Report number
Location
TX
Narrative
Personnel working on a maintenance project finished purging and loading a section of line 70a when an explosion occurred. The gas ignited resulting in a fire and injury to an employee that required hospitalization. Line 070a was isolated and internal and external notifications were completed. An independent investigation and metallurgical analysis are ongoing. A supplemental will be filed upon their completion.
Detailed record list
Report Received Date
2025-08-29 00:00:00
Iyear
2025
Report Number
20250098
Supplemental Number
41327
Report Type
Original
Operator Id
2564
Name
Colorado Interstate Gas Co
Operator Street Address
1001 Louisiana St, Suite 1000
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2025-07-31 11:07:00
Time Zone
Mountain
Daylight Savings Ind
Yes
Location Latitude
43.2800222
Location Longitude
-107.592929
Nrc Rpt Num
1438489
Nrc Rpt Datetime
2025-07-31 11:50:00
Additional Nrc Report Numbers
1438819
Commodity Released Type
Natural Gas
Unintentional Release
10200
Intentional Release
6600
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
Yes
Num Emp Injuries
1
Num Contr Injuries
0
Num Er Injuries
0
Num Worker Injuries
0
Num Gp Injuries
0
Injure
1
Status When Identified
Post-Maintenance/repair
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Initial Responder Com Datetime
2025-07-31 11:07:00
Ignite Ind
Yes
Ignite Datetime
2025-07-31 11:07:00
How Extinguished
Allowed To Burn Out
Gas Consumed By Fire In Mcf
10200
Explode Ind
Yes
Upstream Action Taken
Valve Closure
Upstream Valve Close Datetime
2025-07-31 11:15:00
Downstream Action Taken
Valve Closure
Downstream Vlv Close Datetime
2025-07-31 11:43:00
Num Pub Evacuated
0
Incident Identified Datetime
2025-07-31 11:07:00
On Site Datetime
2025-07-31 11:07:00
Confirmed Discovery Datetime
2025-07-31 11:07:00
On Off Shore
Onshore
Onshore State Abbreviation
Wy
Onshore Postal Code
82642
Onshore City Name
Lysite
Onshore County Name
Fremont
Designated Location
Milepost
Designated Name
Mp 0
Pipe Fac Name
Lost Cabin Meter Station
Segment Name
070a
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
48
Other Underground Facilities
Yes
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
12.75
Puddle Weld Ind
Yes
Pipe Wall Thickness
0.188
Pipe Smys
52000
Pipe Specification
Api 5lx
Pipe Seam Type
Longitudinal Erw - High Frequency
Pipe Manufacturer
Us Steel
Pipe Coating Type
Cold Applied Tape
Coating Applied Ind
Unknown
Installation Year
1969
Manufactured Year
1969
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Other
Rupture Details
The Rupture Is Still Under Investigation And More Information Will Be Available When The Metallurgical Analysis Is Completed.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
332
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
0
Est Cost Intentional Release
0
Est Cost Prop Damage
1000000
Est Cost Emergency
0
Est Cost Other
0
Est Cost Other Details
This Is An Estimate. Investigation On-Going
Gas Cost In Mcf
0
Prpty
1000000
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
9
Gas Flow In Pipe In Mcf
0
Mop Psig
1100
Mop Cfr Section
192.619(C)
Maop Established Date
1970-07-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Remotely Controlled
Downstream Valve Type Ind
Remotely Controlled
Length Segment Isolated
105600
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
No
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 controller involvement.
Employee Drug Test Ind
Yes
Contractor Drug Test Ind
No
Num Employees Tested
3
Num Employees Failed
0
Cause
Incorrect Operation
Cause Details
Other Incorrect Operation
Operation Type
Other Incorrect Operation
Operation Details
Investigation Is Ongoing
Related Other Ind
Yes
Operation Related Details
Investigation Is Ongoing
Category Type
Other Maintenance
Operator Qualification Ind
Yes
Qualified Individuals
Yes, They Were Qualified For The Task(S)
Preparer Name
C****** P********
Preparer Title
Manager - Engineering Codes And Standards
Preparer Email
C****************@k***********.com
Preparer Telephone
7134202460
Local Contact Name
C****** P********
Local Contact Email
C****************@k***********.com
Local Contact Telephone
7134202460
Authorizer Name
C****** P********
Authorizer Title
Manager - Engineering Codes And Standards
Authorizer Telephone
7134202460
Authorizer Email
C****************@k***********.com
Narrative
Personnel working on a maintenance project finished purging and loading a section of line 70a when an explosion occurred. The gas ignited resulting in a fire and injury to an employee that required hospitalization. Line 070a was isolated and internal and external notifications were completed. An independent investigation and metallurgical analysis are ongoing. A supplemental will be filed upon their completion.
| Report Received Date | 2025-08-29 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250098 |
| Supplemental Number | 41327 |
| Report Type | Original |
| Operator Id | 2564 PHMSA Enforcement |
| Name | Colorado Interstate Gas Co |
| Operator Street Address | 1001 Louisiana St, Suite 1000 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2025-07-31 11:07:00 |
| Time Zone | Mountain |
| Daylight Savings Ind | Yes |
| Location Latitude | 43.2800222 Google Maps OpenStreetMap |
| Location Longitude | -107.592929 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1438489 NRC Report How to search |
| Nrc Rpt Datetime | 2025-07-31 11:50:00 |
| Additional Nrc Report Numbers | 1438819 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 10200 |
| Intentional Release | 6600 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | Yes |
| Num Emp Injuries | 1 |
| Num Contr Injuries | 0 |
| Num Er Injuries | 0 |
| Num Worker Injuries | 0 |
| Num Gp Injuries | 0 |
| Injure | 1 |
| Status When Identified | Post-Maintenance/repair |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Initial Responder Com Datetime | 2025-07-31 11:07:00 |
| Ignite Ind | Yes |
| Ignite Datetime | 2025-07-31 11:07:00 |
| How Extinguished | Allowed To Burn Out |
| Gas Consumed By Fire In Mcf | 10200 |
| Explode Ind | Yes |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Close Datetime | 2025-07-31 11:15:00 |
| Downstream Action Taken | Valve Closure |
| Downstream Vlv Close Datetime | 2025-07-31 11:43:00 |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2025-07-31 11:07:00 |
| On Site Datetime | 2025-07-31 11:07:00 |
| Confirmed Discovery Datetime | 2025-07-31 11:07:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Wy |
| Onshore Postal Code | 82642 |
| Onshore City Name | Lysite |
| Onshore County Name | Fremont |
| Designated Location | Milepost |
| Designated Name | Mp 0 |
| Pipe Fac Name | Lost Cabin Meter Station |
| Segment Name | 070a |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 48 |
| Other Underground Facilities | Yes |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 12.75 |
| Puddle Weld Ind | Yes |
| Pipe Wall Thickness | 0.188 |
| Pipe Smys | 52000 |
| Pipe Specification | Api 5lx |
| Pipe Seam Type | Longitudinal Erw - High Frequency |
| Pipe Manufacturer | Us Steel |
| Pipe Coating Type | Cold Applied Tape |
| Coating Applied Ind | Unknown |
| Installation Year | 1969 |
| Manufactured Year | 1969 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Other |
| Rupture Details | The Rupture Is Still Under Investigation And More Information Will Be Available When The Metallurgical Analysis Is Completed. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 332 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 0 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 1000000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Est Cost Other Details | This Is An Estimate. Investigation On-Going |
| Gas Cost In Mcf | 0 |
| Prpty | 1000000 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 9 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 1100 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Maop Established Date | 1970-07-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Valve Type Ind | Remotely Controlled |
| Length Segment Isolated | 105600 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | No |
| 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 controller involvement. |
| Employee Drug Test Ind | Yes |
| Contractor Drug Test Ind | No |
| Num Employees Tested | 3 |
| Num Employees Failed | 0 |
| Cause | Incorrect Operation |
| Cause Details | Other Incorrect Operation |
| Operation Type | Other Incorrect Operation |
| Operation Details | Investigation Is Ongoing |
| Related Other Ind | Yes |
| Operation Related Details | Investigation Is Ongoing |
| Category Type | Other Maintenance |
| Operator Qualification Ind | Yes |
| Qualified Individuals | Yes, They Were Qualified For The Task(S) |
| Preparer Name | C****** P******** |
| Preparer Title | Manager - Engineering Codes And Standards |
| Preparer Email | C****************@k***********.com |
| Preparer Telephone | 7134202460 |
| Local Contact Name | C****** P******** |
| Local Contact Email | C****************@k***********.com |
| Local Contact Telephone | 7134202460 |
| Authorizer Name | C****** P******** |
| Authorizer Title | Manager - Engineering Codes And Standards |
| Authorizer Telephone | 7134202460 |
| Authorizer Email | C****************@k***********.com |
| Narrative | Personnel working on a maintenance project finished purging and loading a section of line 70a when an explosion occurred. The gas ignited resulting in a fire and injury to an employee that required hospitalization. Line 070a was isolated and internal and external notifications were completed. An independent investigation and metallurgical analysis are ongoing. A supplemental will be filed upon their completion. |
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