Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2022-10-07 — TX
Operator
High Point Gas Gathering, Llc
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$470,637
Incident datetime
2022-10-07 11:00
Report number
Location
TX
Narrative
On 10/07/22 at approximately 11:04am while field personnel were flying back from duties at another location, they spotted bubbles on the sea surface with no sheen in close proximity to one of our pipelines (high point gas gathering (hpgg), sp160 bsee 4283). At that time control center did not see a pressure drop. A call was placed to the nrc at 6:12pm on 10/07/22 (nrc# 1349308) to report an unknown release as well to the coast guard to issue a broadcast warning to all marine traffic. Third coast hpgg shut in production and isolated the lateral to stabilize and monitor the pressure. Third coast also contracted a vessel to be at the release site to monitor and keep traffic at a safe distance. On 10/8/22 after the pressure settled due to production and receiving shutting down; a slow pressure drop was observed. It was determined that the release was coming from our pipeline. On 10/08/22 at 6:54pm a call was placed to the nrc (nrc# 1349385) to take ownership of the release and update with known information. Hpgg kept the lateral isolated from the mainline upstream; downstream of the release was blinded. Control center had production maintain flow in the line to keep a 150psi to 200psi on the line to prevent water entering until repairs could be made. On 10/10/22 at 2:40pm a 48hr call was placed to the nrc (nrc# 1349499) to update with new information. Due to availability, a dive boat could not arrive on location until 10/16/22 to locate the release. Divers located the release and confirmed that it was coming from the sp160 lateral. Due to weather, the dive boat had to return to the dock. On 10/20/22 the dive boat was back on location diving and making the repair. On 10/23/22 at 2:46am the repair was made with a clamp and the release stopped. Approximately 4.983 million cubic feet of natural gas was released. The divers then moved upstream isolating the pipeline via a subsea valve sets from the producer. The sp160 lateral will be purged of hydrocarbons and kept isolated.
Detailed record list
Report Received Date
2022-11-07 00:00:00
Iyear
2022
Report Number
20220117
Supplemental Number
37324
Report Type
Original Final
Operator Id
32595
Name
High Point Gas Gathering, 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
2022-10-08 17:14:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
29.7194167
Location Longitude
-88.877333
Nrc Rpt Num
1349385
Nrc Rpt Datetime
2022-10-08 17:54:00
Additional Nrc Report Numbers
1349499
Commodity Released Type
Natural Gas
Unintentional Release
4983
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
Producer Kept Flow At 150 Psi To Prevent Water From Entering Pipe
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Close Datetime
2022-10-17 17:14:00
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Downstream Was Blinded No Valve
Num Pub Evacuated
0
Incident Identified Datetime
2022-10-07 11:00:00
On Site Datetime
2022-10-16 20:44:00
On Off Shore
Offshore
Pipe Fac Name
Main Pass To Franklin 26"
Segment Name
Sp 160 Lateral 18" (Bsee 4283)
Off Water Depth
200
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Ocs Type
Ocs-Gulf Of Mexico
Off Ocs Area
Main Pass
Off Ocs Block
148
Off Area Accident Type
Below Water, Pipe Buried Or Jetted Below Seabed
Pipe Facility Type
Interstate
System Part Involved
Offshore Pipeline, Including Riser And Riser Bend
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
18
Puddle Weld Ind
No
Pipe Wall Thickness
0.5
Pipe Smys
52000
Pipe Specification
X-52
Pipe Seam Type
Longitudinal Erw - High Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Other
Pipe Coating Details
Concrete And Mastic
Coating Applied Ind
No
Installation Year
1974
Manufactured Year
1973
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
354
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
33635
Est Cost Intentional Release
0
Est Cost Prop Damage
470637
Est Cost Emergency
93300
Est Cost Other
0
Gas Cost In Mcf
6.75
Prpty
597572
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
814
Gas Flow In Pipe In Mcf
0
Mop Psig
1200
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1974-01-25 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Remotely Controlled
Length Segment Isolated
58608
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
Downstream End Of Pipe Blinded
Operation Complications Ind
Yes
Low Flow Ind
Yes
Pipeline Function
Offshore Gathering
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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
Not Cut Open
Int Corrosive Commodity Ind
Yes
Int Field Exam Basis Ind
Yes
Int Dead Leg Loc Ind
Yes
Corrosion Inhibitors
No
Corrosion Lining
No
Cleaning Dewatering
No
Corrosion Coupons
No
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
Authorizer Name
N****** P********
Authorizer Title
Manager Pipeline Regulatory Compliance
Authorizer Telephone
3462413368
Authorizer Email
N*********@t**********.com
Narrative
On 10/07/22 at approximately 11:04am while field personnel were flying back from duties at another location, they spotted bubbles on the sea surface with no sheen in close proximity to one of our pipelines (high point gas gathering (hpgg), sp160 bsee 4283). At that time control center did not see a pressure drop. A call was placed to the nrc at 6:12pm on 10/07/22 (nrc# 1349308) to report an unknown release as well to the coast guard to issue a broadcast warning to all marine traffic. Third coast hpgg shut in production and isolated the lateral to stabilize and monitor the pressure. Third coast also contracted a vessel to be at the release site to monitor and keep traffic at a safe distance. On 10/8/22 after the pressure settled due to production and receiving shutting down; a slow pressure drop was observed. It was determined that the release was coming from our pipeline. On 10/08/22 at 6:54pm a call was placed to the nrc (nrc# 1349385) to take ownership of the release and update with known information. Hpgg kept the lateral isolated from the mainline upstream; downstream of the release was blinded. Control center had production maintain flow in the line to keep a 150psi to 200psi on the line to prevent water entering until repairs could be made. On 10/10/22 at 2:40pm a 48hr call was placed to the nrc (nrc# 1349499) to update with new information. Due to availability, a dive boat could not arrive on location until 10/16/22 to locate the release. Divers located the release and confirmed that it was coming from the sp160 lateral. Due to weather, the dive boat had to return to the dock. On 10/20/22 the dive boat was back on location diving and making the repair. On 10/23/22 at 2:46am the repair was made with a clamp and the release stopped. Approximately 4.983 million cubic feet of natural gas was released. The divers then moved upstream isolating the pipeline via a subsea valve sets from the producer. The sp160 lateral will be purged of hydrocarbons and kept isolated.
| Report Received Date | 2022-11-07 00:00:00 |
|---|---|
| Iyear | 2022 |
| Report Number | 20220117 |
| Supplemental Number | 37324 |
| Report Type | Original Final |
| Operator Id | 32595 PHMSA Enforcement |
| Name | High Point Gas Gathering, 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 | 2022-10-08 17:14:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 29.7194167 Google Maps OpenStreetMap |
| Location Longitude | -88.877333 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1349385 NRC Report How to search |
| Nrc Rpt Datetime | 2022-10-08 17:54:00 |
| Additional Nrc Report Numbers | 1349499 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4983 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Producer Kept Flow At 150 Psi To Prevent Water From Entering Pipe |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Close Datetime | 2022-10-17 17:14:00 |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Downstream Was Blinded No Valve |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2022-10-07 11:00:00 |
| On Site Datetime | 2022-10-16 20:44:00 |
| On Off Shore | Offshore |
| Pipe Fac Name | Main Pass To Franklin 26" |
| Segment Name | Sp 160 Lateral 18" (Bsee 4283) |
| Off Water Depth | 200 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Ocs Type | Ocs-Gulf Of Mexico |
| Off Ocs Area | Main Pass |
| Off Ocs Block | 148 |
| Off Area Accident Type | Below Water, Pipe Buried Or Jetted Below Seabed |
| Pipe Facility Type | Interstate |
| System Part Involved | Offshore Pipeline, Including Riser And Riser Bend |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 18 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.5 |
| Pipe Smys | 52000 |
| Pipe Specification | X-52 |
| Pipe Seam Type | Longitudinal Erw - High Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Other |
| Pipe Coating Details | Concrete And Mastic |
| Coating Applied Ind | No |
| Installation Year | 1974 |
| Manufactured Year | 1973 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 354 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 33635 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 470637 |
| Est Cost Emergency | 93300 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 6.75 |
| Prpty | 597572 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 814 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 1200 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1974-01-25 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Remotely Controlled |
| Length Segment Isolated | 58608 |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | Downstream End Of Pipe Blinded |
| Operation Complications Ind | Yes |
| Low Flow Ind | Yes |
| Pipeline Function | Offshore Gathering |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| 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 | Not Cut Open |
| Int Corrosive Commodity Ind | Yes |
| Int Field Exam Basis Ind | Yes |
| Int Dead Leg Loc Ind | Yes |
| Corrosion Inhibitors | No |
| Corrosion Lining | No |
| Cleaning Dewatering | No |
| Corrosion Coupons | No |
| 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 |
| Authorizer Name | N****** P******** |
| Authorizer Title | Manager Pipeline Regulatory Compliance |
| Authorizer Telephone | 3462413368 |
| Authorizer Email | N*********@t**********.com |
| Narrative | On 10/07/22 at approximately 11:04am while field personnel were flying back from duties at another location, they spotted bubbles on the sea surface with no sheen in close proximity to one of our pipelines (high point gas gathering (hpgg), sp160 bsee 4283). At that time control center did not see a pressure drop. A call was placed to the nrc at 6:12pm on 10/07/22 (nrc# 1349308) to report an unknown release as well to the coast guard to issue a broadcast warning to all marine traffic. Third coast hpgg shut in production and isolated the lateral to stabilize and monitor the pressure. Third coast also contracted a vessel to be at the release site to monitor and keep traffic at a safe distance. On 10/8/22 after the pressure settled due to production and receiving shutting down; a slow pressure drop was observed. It was determined that the release was coming from our pipeline. On 10/08/22 at 6:54pm a call was placed to the nrc (nrc# 1349385) to take ownership of the release and update with known information. Hpgg kept the lateral isolated from the mainline upstream; downstream of the release was blinded. Control center had production maintain flow in the line to keep a 150psi to 200psi on the line to prevent water entering until repairs could be made. On 10/10/22 at 2:40pm a 48hr call was placed to the nrc (nrc# 1349499) to update with new information. Due to availability, a dive boat could not arrive on location until 10/16/22 to locate the release. Divers located the release and confirmed that it was coming from the sp160 lateral. Due to weather, the dive boat had to return to the dock. On 10/20/22 the dive boat was back on location diving and making the repair. On 10/23/22 at 2:46am the repair was made with a clamp and the release stopped. Approximately 4.983 million cubic feet of natural gas was released. The divers then moved upstream isolating the pipeline via a subsea valve sets from the producer. The sp160 lateral will be purged of hydrocarbons and kept isolated. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA