Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-08-11 — LA
Operator
Crescent Midstream, Llc
Cause
Incorrect Operation
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$400,168
Incident datetime
2023-08-11 00:00 UTC
Report number
Location
LA
Narrative
Crescent conducted a hydrotest on the delta north 2 pipeline prior to the incident. During the hydrotest it was determined that valves on the ssti assembly connecting the delta duck facility to crescent's dn2 pipeline did not hold pressure. A successful hydrotest was conducted after removing a spool piece from the ssti assembly and installing a blind flange. The assembly was reassembled and product was returned to the line and a 2 hour stand up test was conducted. The line was then returned to service and during site checks by the contract crew, a small sheen was observed on the water above the assembly and pipeline. Divers went down to conduct a swab test and found a couple fittings and flanges with small leaks. New valves were ordered and during the construction activities to replace the valves on the assembly, crude oil was released. All assembly valves were replaced and the pipeline has been returned to service.
Detailed record list
Report Received Date
2023-08-11 00:00:00
Iyear
2023
Report Number
20230186
Supplemental Number
38648
Report Type
Supplemental Final
Operator Id
39084
Name
Crescent Midstream, Llc
Operator Street Address
263 Trinity Lane
Operator City Name
Gray
Operator State Abbreviation
LA
Operator Postal Code
70359
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
29.26058
Location Longitude
-89.19948
Commodity Released Type
Crude Oil
Unintentional Release Bbls
2.6
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Status When Identified
Post-Maintenance/repair
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Nrc Rpt Num
1372933
Additional Nrc Report Numbers
1373300
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Control Center Gave A Disable Command To The Delta Duck Facility, Mp-64, And Romere Facilities.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Isolated At Mp69 Facility And Bled Down Pressure From Pipeline.
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
Yes
Osro Arrived On Site Dt
7/15/2023 7:00
Num Pub Evacuated
0
Pipe Fac Name
Delta Duck Ssti (Ssti Assembly To Dn2 Pipeline)
Segment Name
La Dn2
Onshore State Abbreviation
La
Onshore Postal Code
70091
Onshore City Name
Not Within A Municipality
Onshore County Name
Plaquemines
Designated Location
Survey Station No.
Designated Name
Unkown
Federal
Yes
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Other
Incident Area Details
Occurred Mississippi River Delta/water
Depth Of Cover
36
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Flange Assembly
Installation Year
2013
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Connection Failure
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
215
Est Cost Prop Damage
400168
Est Cost Emergency
176617
Est Cost Environmental
0
Est Cost Other
0
Prpty
577000
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
900
Mop Cfr Section
Other
Mop Cfr Section Details
8 Hour Pressure Test
Maop Established Date
2023-07-04 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
The Leak Occurred On A 3" Ssti Assembly That Ties Into The Dn2 Pipeline. The Lateral Assembly Can Not Accommodate An Ili Tool.
Operation Complications 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
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf 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
The line was enabled and started after maintenance activities and contract personnel were on site.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Equipment Not Installed Properly
Operation Type
Equipment Not Installed Properly
Related Inadequate Proc Ind
Yes
Category Type
Construction
Operator Qualification Ind
Yes
Qualified Individuals
Yes, They Were Qualified For The Task(S)
Preparer Name
D***** P****
Preparer Title
Safety And Regulatory Supervisor
Preparer Email
D*****@c**********.com
Preparer Telephone
985-856-3965
Prepared Date
2023-10-11 00:00:00
Authorizer Name
E*** L****
Authorizer Telephone
985-347-8989
Authorizer Email
E*****@c**********.com
Narrative
Crescent conducted a hydrotest on the delta north 2 pipeline prior to the incident. During the hydrotest it was determined that valves on the ssti assembly connecting the delta duck facility to crescent's dn2 pipeline did not hold pressure. A successful hydrotest was conducted after removing a spool piece from the ssti assembly and installing a blind flange. The assembly was reassembled and product was returned to the line and a 2 hour stand up test was conducted. The line was then returned to service and during site checks by the contract crew, a small sheen was observed on the water above the assembly and pipeline. Divers went down to conduct a swab test and found a couple fittings and flanges with small leaks. New valves were ordered and during the construction activities to replace the valves on the assembly, crude oil was released. All assembly valves were replaced and the pipeline has been returned to service.
| Report Received Date | 2023-08-11 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230186 |
| Supplemental Number | 38648 |
| Report Type | Supplemental Final |
| Operator Id | 39084 PHMSA Enforcement |
| Name | Crescent Midstream, Llc |
| Operator Street Address | 263 Trinity Lane |
| Operator City Name | Gray |
| Operator State Abbreviation | LA |
| Operator Postal Code | 70359 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 29.26058 Google Maps OpenStreetMap |
| Location Longitude | -89.19948 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 2.6 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Status When Identified | Post-Maintenance/repair |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Nrc Rpt Num | 1372933 NRC Report How to search |
| Additional Nrc Report Numbers | 1373300 |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Control Center Gave A Disable Command To The Delta Duck Facility, Mp-64, And Romere Facilities. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Isolated At Mp69 Facility And Bled Down Pressure From Pipeline. |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | Yes |
| Osro Arrived On Site Dt | 7/15/2023 7:00 |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Delta Duck Ssti (Ssti Assembly To Dn2 Pipeline) |
| Segment Name | La Dn2 |
| Onshore State Abbreviation | La |
| Onshore Postal Code | 70091 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Plaquemines |
| Designated Location | Survey Station No. |
| Designated Name | Unkown |
| Federal | Yes |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Other |
| Incident Area Details | Occurred Mississippi River Delta/water |
| Depth Of Cover | 36 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Flange Assembly |
| Installation Year | 2013 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 215 |
| Est Cost Prop Damage | 400168 |
| Est Cost Emergency | 176617 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 577000 |
| 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 | 900 |
| Mop Cfr Section | Other View CFR 49 §192 |
| Mop Cfr Section Details | 8 Hour Pressure Test |
| Maop Established Date | 2023-07-04 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 | The Leak Occurred On A 3" Ssti Assembly That Ties Into The Dn2 Pipeline. The Lateral Assembly Can Not Accommodate An Ili Tool. |
| Operation Complications 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 | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf 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 | The line was enabled and started after maintenance activities and contract personnel were on site. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Equipment Not Installed Properly |
| Operation Type | Equipment Not Installed Properly |
| Related Inadequate Proc Ind | Yes |
| Category Type | Construction |
| Operator Qualification Ind | Yes |
| Qualified Individuals | Yes, They Were Qualified For The Task(S) |
| Preparer Name | D***** P**** |
| Preparer Title | Safety And Regulatory Supervisor |
| Preparer Email | D*****@c**********.com |
| Preparer Telephone | 985-856-3965 |
| Prepared Date | 2023-10-11 00:00:00 |
| Authorizer Name | E*** L**** |
| Authorizer Telephone | 985-347-8989 |
| Authorizer Email | E*****@c**********.com |
| Narrative | Crescent conducted a hydrotest on the delta north 2 pipeline prior to the incident. During the hydrotest it was determined that valves on the ssti assembly connecting the delta duck facility to crescent's dn2 pipeline did not hold pressure. A successful hydrotest was conducted after removing a spool piece from the ssti assembly and installing a blind flange. The assembly was reassembled and product was returned to the line and a 2 hour stand up test was conducted. The line was then returned to service and during site checks by the contract crew, a small sheen was observed on the water above the assembly and pipeline. Divers went down to conduct a swab test and found a couple fittings and flanges with small leaks. New valves were ordered and during the construction activities to replace the valves on the assembly, crude oil was released. All assembly valves were replaced and the pipeline has been returned to service. |
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