Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2025-06-23 — TX
Operator
Chevron Midstream Services Llc
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$10,000
Incident datetime
2025-06-23 07:00
Report number
Location
TX
Narrative
Receiver bypass outlet block valve, ball to valve body sealing o-ring failed. 6" valve. This was due to a buildup of liquids in receiver barrel, from barrel being blocked in. This issue was mitigated with an operational change.
Detailed record list
Report Received Date
2025-07-22 00:00:00
Iyear
2025
Report Number
20250172
Supplemental Number
41387
Report Type
Supplemental Final
Operator Id
40419
Name
Chevron Midstream Services Llc
Operator Street Address
1400 Smith St Floor 37
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2025-06-23 07:00:00
Time Zone
Mountain
Daylight Savings Ind
Yes
Location Latitude
40.2060667
Location Longitude
-104.6051045
Commodity Released Type
Crude Oil
Unintentional Release Bbls
1.4
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2025-06-23 07:00:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2025-06-23 07:00:00
Restart Datetime
2025-07-17 12:10:00
Communication State Fed Ind
No
On Site Datetime
2025-06-23 08:30:00
Confirmed Discovery Datetime
2025-06-23 07:00:00
Nrc Rpt Datetime
2025-06-23 07:55:00
Nrc Rpt Num
1434856
Additional Nrc Report Numbers
1434934
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Close Datetime
2025-06-23 07:00:00
Upstream Valve Type Ind
Remotely Controlled
Downstream Action Taken
Valve Closure
Downstream Vlv Close Datetime
2025-06-23 07:00:00
Downstream Valve Type Ind
Manual
Notify Qualified Indiv Ind
Yes
Qualified Indiv Notif Datetime
2025-06-23 07:15:00
Oil Spill Removal Org Ind
Yes
Osro Activated Datetime
2025-06-23 07:15:00
Osro Arrived On Site Dt
6/23/2025 8:30
Num Pub Evacuated
0
Pipe Fac Name
Milton To White Cliffs
Segment Name
Col 4800
Onshore State Abbreviation
Co
Onshore Postal Code
80645
Onshore City Name
Not Within A Municipality
Onshore County Name
Weld
Designated Location
Milepost
Designated Name
32-49
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Valve
Valve Type
Mainline
Valve Mainline Type
Ball
Valve Manufacturer
Unknown
Installation Year
2025
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Seal Or Packing
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
120
Est Cost Prop Damage
10000
Est Cost Emergency
0
Est Cost Environmental
5000
Est Cost Other
0
Prpty
15120
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
100
Mop Psig
265
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2016-12-10 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
5500
Internal Inspection Ind
Yes
Operation Complications 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
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Block Valve Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Block Valve Sealing Body O-Ring Failed Due To Liquid Buildup In Receiver Barrel
Preparer Name
C**** G****
Preparer Title
Regulatory Specialist
Preparer Email
C**********@c******.com
Preparer Telephone
9703818443
Prepared Date
2025-09-18 00:00:00
Local Contact Name
C**** G****
Local Contact Email
C**********@c******.com
Local Contact Telephone
9703818443
Authorizer Name
C**** G****
Authorizer Telephone
9703818443
Authorizer Title
Regulatory Specialist
Authorizer Email
C**********@c******.com
Narrative
Receiver bypass outlet block valve, ball to valve body sealing o-ring failed. 6" valve. This was due to a buildup of liquids in receiver barrel, from barrel being blocked in. This issue was mitigated with an operational change.
| Report Received Date | 2025-07-22 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250172 |
| Supplemental Number | 41387 |
| Report Type | Supplemental Final |
| Operator Id | 40419 PHMSA Enforcement |
| Name | Chevron Midstream Services Llc |
| Operator Street Address | 1400 Smith St Floor 37 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2025-06-23 07:00:00 |
| Time Zone | Mountain |
| Daylight Savings Ind | Yes |
| Location Latitude | 40.2060667 Google Maps OpenStreetMap |
| Location Longitude | -104.6051045 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 1.4 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2025-06-23 07:00:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2025-06-23 07:00:00 |
| Restart Datetime | 2025-07-17 12:10:00 |
| Communication State Fed Ind | No |
| On Site Datetime | 2025-06-23 08:30:00 |
| Confirmed Discovery Datetime | 2025-06-23 07:00:00 |
| Nrc Rpt Datetime | 2025-06-23 07:55:00 |
| Nrc Rpt Num | 1434856 NRC Report How to search |
| Additional Nrc Report Numbers | 1434934 |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Close Datetime | 2025-06-23 07:00:00 |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Action Taken | Valve Closure |
| Downstream Vlv Close Datetime | 2025-06-23 07:00:00 |
| Downstream Valve Type Ind | Manual |
| Notify Qualified Indiv Ind | Yes |
| Qualified Indiv Notif Datetime | 2025-06-23 07:15:00 |
| Oil Spill Removal Org Ind | Yes |
| Osro Activated Datetime | 2025-06-23 07:15:00 |
| Osro Arrived On Site Dt | 6/23/2025 8:30 |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Milton To White Cliffs |
| Segment Name | Col 4800 |
| Onshore State Abbreviation | Co |
| Onshore Postal Code | 80645 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Weld |
| Designated Location | Milepost |
| Designated Name | 32-49 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Valve |
| Valve Type | Mainline |
| Valve Mainline Type | Ball |
| Valve Manufacturer | Unknown |
| Installation Year | 2025 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 120 |
| Est Cost Prop Damage | 10000 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 5000 |
| Est Cost Other | 0 |
| Prpty | 15120 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 100 |
| Mop Psig | 265 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2016-12-10 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 5500 |
| Internal Inspection Ind | Yes |
| Operation Complications 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 | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Block Valve Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Block Valve Sealing Body O-Ring Failed Due To Liquid Buildup In Receiver Barrel |
| Preparer Name | C**** G**** |
| Preparer Title | Regulatory Specialist |
| Preparer Email | C**********@c******.com |
| Preparer Telephone | 9703818443 |
| Prepared Date | 2025-09-18 00:00:00 |
| Local Contact Name | C**** G**** |
| Local Contact Email | C**********@c******.com |
| Local Contact Telephone | 9703818443 |
| Authorizer Name | C**** G**** |
| Authorizer Telephone | 9703818443 |
| Authorizer Title | Regulatory Specialist |
| Authorizer Email | C**********@c******.com |
| Narrative | Receiver bypass outlet block valve, ball to valve body sealing o-ring failed. 6" valve. This was due to a buildup of liquids in receiver barrel, from barrel being blocked in. This issue was mitigated with an operational change. |
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