Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2025-07-24 — CO
Operator
Mplx Lp
Cause
Corrosion Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$200,000
Incident datetime
2025-07-24 00:00 UTC
Report number
Location
CO
Narrative
On june 24, 2025, mplx operations personnel arrived at conan station and observed evidence of a crude oil leak originating from below ground. The leak was located in the vicinity of the enterprise 20� outgoing line and an adjacent 10� relief line. In response, the operator initiated an emergency shutdown (esd) of the station and immediately notified the control room and the operations manager. Both lines were isolated to determine the source of the leak. After confirming the leaking line, inlet flows to the station were returned to service. The enterprise 20� outgoing line was then disconnected and blinded. The station was subsequently brought back online. An estimated volume of approximately 10 barrels (bbls) of crude oil was released. All released product remained contained on mplx property with no off-site impact. Investigation findings: the investigation concluded that the failure was caused by internal corrosion due to microbiological activity, likely exacerbated by the line�s low flow rates. Path forward: � abandon the affected line. � retie the line to alternate headers to increase flow frequency. � replace the line, as necessary, to ensure continued safe operation.
Detailed record list
Report Received Date
2025-07-24 00:00:00
Iyear
2025
Report Number
20250174
Supplemental Number
41170
Report Type
Original Final
Operator Id
40149
Name
Mplx Lp
Operator Street Address
1515 Arapahoe Street Suite 1600
Operator City Name
Denver
Operator State Abbreviation
CO
Operator Postal Code
80202
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
31.977837
Location Longitude
-103.66352
Commodity Released Type
Crude Oil
Unintentional Release Bbls
10
Recovered Bbls
10
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
No
Nrc Rpt Num
1434981
Additional Nrc Report Numbers
1435190
Ignite Ind
No
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
Yes
Osro Arrived On Site Dt
6/24/2025 9:10
Num Pub Evacuated
0
Pipe Fac Name
Conan Station
Segment Name
Enterprise Suction Line
Onshore State Abbreviation
Tx
Onshore Postal Code
79754
Onshore City Name
Not Within A Municipality
Onshore County Name
Loving
Designated Location
Survey Station No.
Designated Name
0.85
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
36
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Puddle Weld Ind
No
Pipe Diameter
20
Pipe Wall Thickness
0.375
Pipe Smys
52000
Pipe Specification
Api 5l Ss,erw
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Fusion Bonded Epoxy(Fbe)
Coating Applied Ind
No
Installation Year
2018
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
650
Est Cost Prop Damage
200000
Est Cost Emergency
0
Est Cost Environmental
175000
Est Cost Other
0
Prpty
375650
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
3
Mop Psig
285
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2018-04-14 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
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
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
General Corrosion
Int Microbiological Ind
Yes
Int Field Exam Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
No
Corrosion Lining
No
Cleaning Dewatering
No
Corrosion Coupons
Not Applicable - Not Mainline Pipe
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Intrnl Cor Microbiologic Ind
Yes
Preparer Name
W****** K N*****
Preparer Title
Pipeline Compliance Specialist
Preparer Email
W*******@m***.com
Preparer Telephone
5053600834
Prepared Date
2025-07-24 00:00:00
Local Contact Name
K**** N*****
Local Contact Email
W*******@m***.com
Local Contact Telephone
5053600834
Authorizer Name
A***** R********
Authorizer Telephone
2102438906
Authorizer Title
Compliance Manager
Authorizer Email
A**********@m***.com
Narrative
On june 24, 2025, mplx operations personnel arrived at conan station and observed evidence of a crude oil leak originating from below ground. The leak was located in the vicinity of the enterprise 20� outgoing line and an adjacent 10� relief line. In response, the operator initiated an emergency shutdown (esd) of the station and immediately notified the control room and the operations manager. Both lines were isolated to determine the source of the leak. After confirming the leaking line, inlet flows to the station were returned to service. The enterprise 20� outgoing line was then disconnected and blinded. The station was subsequently brought back online. An estimated volume of approximately 10 barrels (bbls) of crude oil was released. All released product remained contained on mplx property with no off-site impact. Investigation findings: the investigation concluded that the failure was caused by internal corrosion due to microbiological activity, likely exacerbated by the line�s low flow rates. Path forward: � abandon the affected line. � retie the line to alternate headers to increase flow frequency. � replace the line, as necessary, to ensure continued safe operation.
| Report Received Date | 2025-07-24 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250174 |
| Supplemental Number | 41170 |
| Report Type | Original Final |
| Operator Id | 40149 PHMSA Enforcement |
| Name | Mplx Lp |
| Operator Street Address | 1515 Arapahoe Street Suite 1600 |
| Operator City Name | Denver |
| Operator State Abbreviation | CO |
| Operator Postal Code | 80202 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 31.977837 Google Maps OpenStreetMap |
| Location Longitude | -103.66352 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 10 |
| Recovered Bbls | 10 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | No |
| Nrc Rpt Num | 1434981 NRC Report How to search |
| Additional Nrc Report Numbers | 1435190 |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | Yes |
| Osro Arrived On Site Dt | 6/24/2025 9:10 |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Conan Station |
| Segment Name | Enterprise Suction Line |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 79754 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Loving |
| Designated Location | Survey Station No. |
| Designated Name | 0.85 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 36 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Puddle Weld Ind | No |
| Pipe Diameter | 20 |
| Pipe Wall Thickness | 0.375 |
| Pipe Smys | 52000 |
| Pipe Specification | Api 5l Ss,erw |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Fusion Bonded Epoxy(Fbe) |
| Coating Applied Ind | No |
| Installation Year | 2018 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 650 |
| Est Cost Prop Damage | 200000 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 175000 |
| Est Cost Other | 0 |
| Prpty | 375650 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 3 |
| Mop Psig | 285 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2018-04-14 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| 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 | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | General Corrosion |
| Int Microbiological Ind | Yes |
| Int Field Exam Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | No |
| Corrosion Lining | No |
| Cleaning Dewatering | No |
| Corrosion Coupons | Not Applicable - Not Mainline Pipe |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Intrnl Cor Microbiologic Ind | Yes |
| Preparer Name | W****** K N***** |
| Preparer Title | Pipeline Compliance Specialist |
| Preparer Email | W*******@m***.com |
| Preparer Telephone | 5053600834 |
| Prepared Date | 2025-07-24 00:00:00 |
| Local Contact Name | K**** N***** |
| Local Contact Email | W*******@m***.com |
| Local Contact Telephone | 5053600834 |
| Authorizer Name | A***** R******** |
| Authorizer Telephone | 2102438906 |
| Authorizer Title | Compliance Manager |
| Authorizer Email | A**********@m***.com |
| Narrative | On june 24, 2025, mplx operations personnel arrived at conan station and observed evidence of a crude oil leak originating from below ground. The leak was located in the vicinity of the enterprise 20� outgoing line and an adjacent 10� relief line. In response, the operator initiated an emergency shutdown (esd) of the station and immediately notified the control room and the operations manager. Both lines were isolated to determine the source of the leak. After confirming the leaking line, inlet flows to the station were returned to service. The enterprise 20� outgoing line was then disconnected and blinded. The station was subsequently brought back online. An estimated volume of approximately 10 barrels (bbls) of crude oil was released. All released product remained contained on mplx property with no off-site impact. Investigation findings: the investigation concluded that the failure was caused by internal corrosion due to microbiological activity, likely exacerbated by the line�s low flow rates. Path forward: � abandon the affected line. � retie the line to alternate headers to increase flow frequency. � replace the line, as necessary, to ensure continued safe operation. |
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