Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2025-08-23 — TX
Operator
Panther Operating Company, Llc
Cause
Corrosion Failure
Commodity
Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$98,000
Incident datetime
2025-08-23 15:12
Report number
Location
TX
Narrative
On august 23, 2025, at approximately 3:12 pm, while conducting routine aerial patrols, the pilot observed a sheen coming from platform smi 288a. The pilot informed the local operation group and flew back to pick up an operations person. Once back on site and landed on the platform, operations confirmed that there was a small pin hole drip on the 4� riser pipeline and less than a gallon of oily water mixture had dripped in the gulf of america creating a sheen. The platform is currently deactivated and is scheduled to be decommissioned by the producer, and the pipeline is air-gapped on both ends and blinded off. There is zero pressure on the pipeline. On 8/26/25 operators placed a temporary containment wrap of absorbent pads and wax tap to stop the drip from hitting the water. To mitigate the leak; on 8/30/25 a hot tap clamp was installed several feet below the leak location and the fluids were drained and pipeline equalized below the leak location at the hot clamp location. The pipeline is scheduled to be flushed with sea water and abandoned. This will prevent future leaks.
Detailed record list
Report Received Date
2025-09-19 00:00:00
Iyear
2025
Report Number
20250226
Supplemental Number
41463
Report Type
Supplemental Final
Operator Id
31994
Name
Panther Operating Company, Llc
Operator Street Address
Third Coast Midstream, Llc Po Box 1227
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77251
Local Datetime
2025-08-23 15:12:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
28.9834
Location Longitude
-91.866739
Commodity Released Type
Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions
Commodity Subtype
Other
Commodity Details
Condensate
Unintentional Release Bbls
0.1
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Air Patrol
Operator Type
Contractor Working For The Operator
Incident Identified Datetime
2025-08-23 15:12:00
System Part Involved
Offshore Pipeline, Including Riser And Riser Bend
On Off Shore
Offshore
Status When Identified
Idle
Communication State Fed Ind
No
On Site Datetime
2025-08-23 16:00:00
Confirmed Discovery Datetime
2025-08-23 16:00:00
Nrc Rpt Datetime
2025-08-23 16:10:00
Nrc Rpt Num
1440699
Additional Nrc Report Numbers
1440871
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Pipeline Was In An Idle State, With Both Ends Air Gapped From Any Sources.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Pipeline Was In An Idle State, With Both Ends Air Gapped From Any Sources.
Num Pub Evacuated
0
Pipe Fac Name
4.5" Gulf Lateral
Segment Name
4.5" Gulf Lateralssmi 288lateral To Ei133 Bsee9971
Off Water Depth
40
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Ocs Type
Ocs-Gulf Of America
Off Ocs Area
South Marsh Island N
Off Ocs Block
288
Off Area Accident Type
Splash Zone Of Riser
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Puddle Weld Ind
No
Pipe Diameter
4.5
Pipe Wall Thickness
0.337
Pipe Smys
35000
Pipe Specification
Grade B
Pipe Seam Type
Seamless
Pipe Manufacturer
Unknown
Pipe Coating Type
None
Coating Applied Ind
No
Installation Year
1984
Manufactured Year
1984
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
Yes
Ocean Seawater Ind
Yes
Amount Released
0.1
Rel Water Name
Gulf Of America
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
1
Est Cost Prop Damage
98000
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
98001
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
0
Mop Psig
1440
Mop Cfr Section
Subpart E Pressure Test �195.406(A)(3)
Maop Established Date
1984-01-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
No Flow, Air Gapped
Operation Complications Ind
Yes
Low Flow Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
Air Gapped
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
No
Cpm In Place Ind
No
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the accident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
General Corrosion
Atmosphere Corrosion Ind
Yes
Field Exam Basis Ind
Yes
Underground Location
No
Externally Coated
Yes
Prior Damage
N/a Bare/ineffectively Coated Pipe
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
N****** P********
Preparer Title
Manager Pipeline Regulatory Compliance
Preparer Email
N*********@t**********.com
Preparer Telephone
3462413368
Prepared Date
2025-10-15 00:00:00
Authorizer Name
N****** P********
Authorizer Telephone
3462413368
Authorizer Title
Manager Pipeline Regulatory Compliance
Authorizer Email
N*********@t**********.com
Narrative
On august 23, 2025, at approximately 3:12 pm, while conducting routine aerial patrols, the pilot observed a sheen coming from platform smi 288a. The pilot informed the local operation group and flew back to pick up an operations person. Once back on site and landed on the platform, operations confirmed that there was a small pin hole drip on the 4� riser pipeline and less than a gallon of oily water mixture had dripped in the gulf of america creating a sheen. The platform is currently deactivated and is scheduled to be decommissioned by the producer, and the pipeline is air-gapped on both ends and blinded off. There is zero pressure on the pipeline. On 8/26/25 operators placed a temporary containment wrap of absorbent pads and wax tap to stop the drip from hitting the water. To mitigate the leak; on 8/30/25 a hot tap clamp was installed several feet below the leak location and the fluids were drained and pipeline equalized below the leak location at the hot clamp location. The pipeline is scheduled to be flushed with sea water and abandoned. This will prevent future leaks.
| Report Received Date | 2025-09-19 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250226 |
| Supplemental Number | 41463 |
| Report Type | Supplemental Final |
| Operator Id | 31994 PHMSA Enforcement |
| Name | Panther Operating Company, Llc |
| Operator Street Address | Third Coast Midstream, Llc Po Box 1227 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77251 |
| Local Datetime | 2025-08-23 15:12:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 28.9834 Google Maps OpenStreetMap |
| Location Longitude | -91.866739 Google Maps OpenStreetMap |
| Commodity Released Type | Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions |
| Commodity Subtype | Other |
| Commodity Details | Condensate |
| Unintentional Release Bbls | 0.1 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Air Patrol |
| Operator Type | Contractor Working For The Operator |
| Incident Identified Datetime | 2025-08-23 15:12:00 |
| System Part Involved | Offshore Pipeline, Including Riser And Riser Bend |
| On Off Shore | Offshore |
| Status When Identified | Idle |
| Communication State Fed Ind | No |
| On Site Datetime | 2025-08-23 16:00:00 |
| Confirmed Discovery Datetime | 2025-08-23 16:00:00 |
| Nrc Rpt Datetime | 2025-08-23 16:10:00 |
| Nrc Rpt Num | 1440699 NRC Report How to search |
| Additional Nrc Report Numbers | 1440871 |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Pipeline Was In An Idle State, With Both Ends Air Gapped From Any Sources. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Pipeline Was In An Idle State, With Both Ends Air Gapped From Any Sources. |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | 4.5" Gulf Lateral |
| Segment Name | 4.5" Gulf Lateralssmi 288lateral To Ei133 Bsee9971 |
| Off Water Depth | 40 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Ocs Type | Ocs-Gulf Of America |
| Off Ocs Area | South Marsh Island N |
| Off Ocs Block | 288 |
| Off Area Accident Type | Splash Zone Of Riser |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Puddle Weld Ind | No |
| Pipe Diameter | 4.5 |
| Pipe Wall Thickness | 0.337 |
| Pipe Smys | 35000 |
| Pipe Specification | Grade B |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | None |
| Coating Applied Ind | No |
| Installation Year | 1984 |
| Manufactured Year | 1984 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | Yes |
| Ocean Seawater Ind | Yes |
| Amount Released | 0.1 |
| Rel Water Name | Gulf Of America |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 1 |
| Est Cost Prop Damage | 98000 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 98001 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 0 |
| Mop Psig | 1440 |
| Mop Cfr Section | Subpart E Pressure Test �195.406(A)(3) View CFR 49 §192 |
| Maop Established Date | 1984-01-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | No Flow, Air Gapped |
| Operation Complications Ind | Yes |
| Low Flow Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | Air Gapped |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | No |
| Cpm In Place Ind | No |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the accident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | General Corrosion |
| Atmosphere Corrosion Ind | Yes |
| Field Exam Basis Ind | Yes |
| Underground Location | No |
| Externally Coated | Yes |
| Prior Damage | N/a Bare/ineffectively Coated Pipe |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | N****** P******** |
| Preparer Title | Manager Pipeline Regulatory Compliance |
| Preparer Email | N*********@t**********.com |
| Preparer Telephone | 3462413368 |
| Prepared Date | 2025-10-15 00:00:00 |
| Authorizer Name | N****** P******** |
| Authorizer Telephone | 3462413368 |
| Authorizer Title | Manager Pipeline Regulatory Compliance |
| Authorizer Email | N*********@t**********.com |
| Narrative | On august 23, 2025, at approximately 3:12 pm, while conducting routine aerial patrols, the pilot observed a sheen coming from platform smi 288a. The pilot informed the local operation group and flew back to pick up an operations person. Once back on site and landed on the platform, operations confirmed that there was a small pin hole drip on the 4� riser pipeline and less than a gallon of oily water mixture had dripped in the gulf of america creating a sheen. The platform is currently deactivated and is scheduled to be decommissioned by the producer, and the pipeline is air-gapped on both ends and blinded off. There is zero pressure on the pipeline. On 8/26/25 operators placed a temporary containment wrap of absorbent pads and wax tap to stop the drip from hitting the water. To mitigate the leak; on 8/30/25 a hot tap clamp was installed several feet below the leak location and the fluids were drained and pipeline equalized below the leak location at the hot clamp location. The pipeline is scheduled to be flushed with sea water and abandoned. This will prevent future leaks. |
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