Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2024-09-03 — TX
Operator
Mid - Valley Pipeline Co
Cause
Corrosion Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$11,029
Incident datetime
2024-09-03 00:00 UTC
Report number
Location
TX
Narrative
On 08/08/24 at approximately 07:15, during the morning walkthrough, a local operator employee discovered a leak on the 16-inch strainer bypass piping at mayersville pump station. The control center was immediately notified and the station was isolated although at the time of discovery the pipeline was down on normal schedule. The leak area was further isolated and an investigation determined the leak was coming from a pinhole leak at the 6 oclock position on the strainer bypass piping. The leak point was repaired using a 16-inch mechanical clamp. Approximately 15 gallons (0.4 bbls.) of crude oil was released. Cleanup contractors removed product and remediated impacted soil. The failed section has been cut out and replaced and sent to a laboratory for examination. Supplemental & final: the lab analysis determined the cause of the accident was due to internal corrosion. To prevent reoccurrence, continuous treatments upstream of this station have been implemented and the volume of product to flush the line was increased.
Detailed record list
Report Received Date
2024-09-03 00:00:00
Iyear
2024
Report Number
20240210
Supplemental Number
40616
Report Type
Supplemental Final
Operator Id
12470
Name
Mid - Valley Pipeline Co
Operator Street Address
1300 Main Street
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
32.876169
Location Longitude
-91.052988
Commodity Released Type
Crude Oil
Unintentional Release Bbls
0.4
Recovered Bbls
0.4
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
No
Shutdown Explain
Line Was Already Shutdown
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Mayersville Station
Segment Name
16-Inch Strainer Bypass Line
Onshore State Abbreviation
Ms
Onshore Postal Code
39111
Onshore City Name
Mayersville
Onshore County Name
Issaquena
Designated Location
Milepost
Designated Name
227
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
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Puddle Weld Ind
No
Pipe Diameter
16
Pipe Wall Thickness
0.375
Pipe Smys
42000
Pipe Specification
X52
Pipe Seam Type
Seamless
Pipe Manufacturer
Unknown
Pipe Coating Type
Cold Applied Tape
Coating Applied Ind
Yes
Installation Year
1950
Manufactured Year
1948
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
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
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
0
Est Cost Prop Damage
11029
Est Cost Emergency
5329
Est Cost Environmental
1800
Est Cost Other
0
Prpty
18158
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
200
Mop Psig
250
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2021-09-20 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
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
No
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
A review of the accident determined that there were no control room actions that contributed to the event.
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
Localized Pitting
Int Water Acid Ind
Yes
Int Microbiological Ind
Yes
Int Field Exam Basis Ind
Yes
Int Metallurgical Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Int Dead Leg Loc Ind
Yes
Corrosion Inhibitors
Yes
Corrosion Lining
No
Cleaning Dewatering
Not Applicable - Not Mainline Pipe
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
Preparer Name
T*** N*******
Preparer Title
Director - Dot Compliance
Preparer Email
T************@e*************.com
Preparer Telephone
713-989-7126
Prepared Date
2025-03-12 00:00:00
Authorizer Name
T*** N*******
Authorizer Telephone
713-989-7126
Authorizer Title
Director - Dot Compliance
Authorizer Email
T************@e*************.com
Narrative
On 08/08/24 at approximately 07:15, during the morning walkthrough, a local operator employee discovered a leak on the 16-inch strainer bypass piping at mayersville pump station. The control center was immediately notified and the station was isolated although at the time of discovery the pipeline was down on normal schedule. The leak area was further isolated and an investigation determined the leak was coming from a pinhole leak at the 6 oclock position on the strainer bypass piping. The leak point was repaired using a 16-inch mechanical clamp. Approximately 15 gallons (0.4 bbls.) of crude oil was released. Cleanup contractors removed product and remediated impacted soil. The failed section has been cut out and replaced and sent to a laboratory for examination. Supplemental & final: the lab analysis determined the cause of the accident was due to internal corrosion. To prevent reoccurrence, continuous treatments upstream of this station have been implemented and the volume of product to flush the line was increased.
| Report Received Date | 2024-09-03 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240210 |
| Supplemental Number | 40616 |
| Report Type | Supplemental Final |
| Operator Id | 12470 PHMSA Enforcement |
| Name | Mid - Valley Pipeline Co |
| Operator Street Address | 1300 Main Street |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 32.876169 Google Maps OpenStreetMap |
| Location Longitude | -91.052988 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 0.4 |
| Recovered Bbls | 0.4 |
| 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 | No |
| Shutdown Explain | Line Was Already Shutdown |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Mayersville Station |
| Segment Name | 16-Inch Strainer Bypass Line |
| Onshore State Abbreviation | Ms |
| Onshore Postal Code | 39111 |
| Onshore City Name | Mayersville |
| Onshore County Name | Issaquena |
| Designated Location | Milepost |
| Designated Name | 227 |
| 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 | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Puddle Weld Ind | No |
| Pipe Diameter | 16 |
| Pipe Wall Thickness | 0.375 |
| Pipe Smys | 42000 |
| Pipe Specification | X52 |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Cold Applied Tape |
| Coating Applied Ind | Yes |
| Installation Year | 1950 |
| Manufactured Year | 1948 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| 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 | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 0 |
| Est Cost Prop Damage | 11029 |
| Est Cost Emergency | 5329 |
| Est Cost Environmental | 1800 |
| Est Cost Other | 0 |
| Prpty | 18158 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 200 |
| Mop Psig | 250 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2021-09-20 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 | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | No |
| 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 | A review of the accident determined that there were no control room actions that contributed to the event. |
| 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 | Localized Pitting |
| Int Water Acid Ind | Yes |
| Int Microbiological Ind | Yes |
| Int Field Exam Basis Ind | Yes |
| Int Metallurgical Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Int Dead Leg Loc Ind | Yes |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | No |
| Cleaning Dewatering | Not Applicable - Not Mainline Pipe |
| 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 |
| Preparer Name | T*** N******* |
| Preparer Title | Director - Dot Compliance |
| Preparer Email | T************@e*************.com |
| Preparer Telephone | 713-989-7126 |
| Prepared Date | 2025-03-12 00:00:00 |
| Authorizer Name | T*** N******* |
| Authorizer Telephone | 713-989-7126 |
| Authorizer Title | Director - Dot Compliance |
| Authorizer Email | T************@e*************.com |
| Narrative | On 08/08/24 at approximately 07:15, during the morning walkthrough, a local operator employee discovered a leak on the 16-inch strainer bypass piping at mayersville pump station. The control center was immediately notified and the station was isolated although at the time of discovery the pipeline was down on normal schedule. The leak area was further isolated and an investigation determined the leak was coming from a pinhole leak at the 6 oclock position on the strainer bypass piping. The leak point was repaired using a 16-inch mechanical clamp. Approximately 15 gallons (0.4 bbls.) of crude oil was released. Cleanup contractors removed product and remediated impacted soil. The failed section has been cut out and replaced and sent to a laboratory for examination. Supplemental & final: the lab analysis determined the cause of the accident was due to internal corrosion. To prevent reoccurrence, continuous treatments upstream of this station have been implemented and the volume of product to flush the line was increased. |
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