Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-11-08 — TX
Operator
Northwest Pipeline Llc
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$385,000
Incident datetime
2023-11-08 00:00 UTC
Report number
Location
TX
Narrative
On october 12, 2023 a farmer accidentally struck the williams 1400 ignacia to sumas 22" pipeline while using an excavator in his field. The williams security operations center (soc) was alerted of the rupture by a power county road crew at 10:30 am mt. The williams operations team immediately dispatched operations personnel to the incident location and the nearest upstream/downstream valve locations to further investigate and isolate the line. At 11:06 mt gas control was notified that the caldwell cs block valve (upstream of the rupture) was closed. At 11:35 mt gas control was notified that valve 11-4a (downstream of the rupture) was closed. The farmer that struck the pipeline was taken to the hospital by his family immediately after the rupture occurred, he was discharged later that day with no significant injuries or in-patient hospitalization. The local emergency responders issued a "shelter in place" order for all residents within 4 square miles of the incident that lasted approximately one hour. Over the course of the next couple of weeks williams worked to replace the damaged pipeline to return the line to service as quickly as possible. The line was returned to service on october 23, 2023.
Detailed record list
Report Received Date
2023-11-08 00:00:00
Iyear
2023
Report Number
20230103
Supplemental Number
39833
Report Type
Supplemental Final
Operator Id
13845
Name
Northwest Pipeline Llc
Operator Street Address
2800 Post Oak Blvd
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77056
Time Zone
Mountain
Daylight Savings Ind
Yes
Location Latitude
43.73412
Location Longitude
-116.597051
Nrc Rpt Num
1381543
Additional Nrc Report Numbers
1381631
Commodity Released Type
Natural Gas
Unintentional Release
50900
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
Yes
Communication State Fed Ind
Yes
Party Initiated Communication
Local/state/federal Emergency Responder
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Id
Onshore Postal Code
83644
Onshore City Name
Middleton
Onshore County Name
Canyon
Designated Location
Milepost
Designated Name
842.7
Pipe Fac Name
Northwest Pipeline
Segment Name
1400 Ignacio To Sumas 22" Line
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
36
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
22
Puddle Weld Ind
No
Pipe Wall Thickness
0.25
Pipe Smys
52000
Pipe Specification
Api 5lx
Pipe Seam Type
Dsaw
Pipe Manufacturer
Kaiser Steel Corporation
Pipe Coating Type
Coal Tar
Coating Applied Ind
Yes
Installation Year
1956
Manufactured Year
1955
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Longitudinal
Rupture Length
4
Rupture Width
6
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
442
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
457082
Est Cost Intentional Release
0
Est Cost Prop Damage
385000
Est Cost Emergency
2000
Est Cost Other
0
Gas Cost In Mcf
8.98
Prpty
844082
Num Persons Hosp Not Ovnght
1
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
633
Gas Flow In Pipe In Mcf
443000
Mop Psig
850
Mop Cfr Section
192.619(A)(3)
Maop Established Date
1965-12-01 00:00:00
Maop Reversal Flow Ind
Bi-Directional
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Remotely Controlled
Downstream Valve Type Ind
Manual
Length Segment Isolated
54489
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
Yes
Accident Identifier
Notification From Public
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 control room noticed a decrease in pressure shortly after the rupture occurred and was able to confirm the rupture for operations. As a result, no investigation was deemed necessary.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Excavation Damage
Cause Details
Excavation Damage By Third Party
Ex Party Type
Excavation Damage By Third Party
Prior Notification Ind
No
State Law Exempt Ind
No
Notify Cga Dirt
No
Private Row Ind
Yes
Private Subtype
Private Landowner
Joint Trench Ind
No
Cross Bore Ind
No
Depth Of Grade
18� � 36�
Excavator Type
Farmer
Excavator Equipment
Backhoe/trackhoe
Work Performed
Drainage
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
Yes
Service Interruption
Yes
Service Interruption Hours
165
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
J*** B***
Preparer Title
Tgom - Manger Pipeline Safety
Preparer Email
J********@w*******.com
Preparer Telephone
337-317-9145
Authorizer Name
J**** L****
Authorizer Title
Director - Pipeline Safety And Asset Integrity
Authorizer Telephone
918-340-3572
Authorizer Email
J***********@w*******.com
Narrative
On october 12, 2023 a farmer accidentally struck the williams 1400 ignacia to sumas 22" pipeline while using an excavator in his field. The williams security operations center (soc) was alerted of the rupture by a power county road crew at 10:30 am mt. The williams operations team immediately dispatched operations personnel to the incident location and the nearest upstream/downstream valve locations to further investigate and isolate the line. At 11:06 mt gas control was notified that the caldwell cs block valve (upstream of the rupture) was closed. At 11:35 mt gas control was notified that valve 11-4a (downstream of the rupture) was closed. The farmer that struck the pipeline was taken to the hospital by his family immediately after the rupture occurred, he was discharged later that day with no significant injuries or in-patient hospitalization. The local emergency responders issued a "shelter in place" order for all residents within 4 square miles of the incident that lasted approximately one hour. Over the course of the next couple of weeks williams worked to replace the damaged pipeline to return the line to service as quickly as possible. The line was returned to service on october 23, 2023.
| Report Received Date | 2023-11-08 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230103 |
| Supplemental Number | 39833 |
| Report Type | Supplemental Final |
| Operator Id | 13845 PHMSA Enforcement |
| Name | Northwest Pipeline Llc |
| Operator Street Address | 2800 Post Oak Blvd |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77056 |
| Time Zone | Mountain |
| Daylight Savings Ind | Yes |
| Location Latitude | 43.73412 Google Maps OpenStreetMap |
| Location Longitude | -116.597051 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1381543 NRC Report How to search |
| Additional Nrc Report Numbers | 1381631 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 50900 |
| 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 | Yes |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Local/state/federal Emergency Responder |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Valve Closure |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Id |
| Onshore Postal Code | 83644 |
| Onshore City Name | Middleton |
| Onshore County Name | Canyon |
| Designated Location | Milepost |
| Designated Name | 842.7 |
| Pipe Fac Name | Northwest Pipeline |
| Segment Name | 1400 Ignacio To Sumas 22" Line |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 36 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 22 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 52000 |
| Pipe Specification | Api 5lx |
| Pipe Seam Type | Dsaw |
| Pipe Manufacturer | Kaiser Steel Corporation |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Yes |
| Installation Year | 1956 |
| Manufactured Year | 1955 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Longitudinal |
| Rupture Length | 4 |
| Rupture Width | 6 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 442 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 457082 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 385000 |
| Est Cost Emergency | 2000 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 8.98 |
| Prpty | 844082 |
| Num Persons Hosp Not Ovnght | 1 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 633 |
| Gas Flow In Pipe In Mcf | 443000 |
| Mop Psig | 850 |
| Mop Cfr Section | 192.619(A)(3) View CFR 49 §192 |
| Maop Established Date | 1965-12-01 00:00:00 |
| Maop Reversal Flow Ind | Bi-Directional |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 54489 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | Yes |
| Accident Identifier | Notification From Public |
| 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 control room noticed a decrease in pressure shortly after the rupture occurred and was able to confirm the rupture for operations. As a result, no investigation was deemed necessary. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Excavation Damage |
| Cause Details | Excavation Damage By Third Party |
| Ex Party Type | Excavation Damage By Third Party |
| Prior Notification Ind | No |
| State Law Exempt Ind | No |
| Notify Cga Dirt | No |
| Private Row Ind | Yes |
| Private Subtype | Private Landowner |
| Joint Trench Ind | No |
| Cross Bore Ind | No |
| Depth Of Grade | 18� � 36� |
| Excavator Type | Farmer |
| Excavator Equipment | Backhoe/trackhoe |
| Work Performed | Drainage |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | Yes |
| Service Interruption | Yes |
| Service Interruption Hours | 165 |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | J*** B*** |
| Preparer Title | Tgom - Manger Pipeline Safety |
| Preparer Email | J********@w*******.com |
| Preparer Telephone | 337-317-9145 |
| Authorizer Name | J**** L**** |
| Authorizer Title | Director - Pipeline Safety And Asset Integrity |
| Authorizer Telephone | 918-340-3572 |
| Authorizer Email | J***********@w*******.com |
| Narrative | On october 12, 2023 a farmer accidentally struck the williams 1400 ignacia to sumas 22" pipeline while using an excavator in his field. The williams security operations center (soc) was alerted of the rupture by a power county road crew at 10:30 am mt. The williams operations team immediately dispatched operations personnel to the incident location and the nearest upstream/downstream valve locations to further investigate and isolate the line. At 11:06 mt gas control was notified that the caldwell cs block valve (upstream of the rupture) was closed. At 11:35 mt gas control was notified that valve 11-4a (downstream of the rupture) was closed. The farmer that struck the pipeline was taken to the hospital by his family immediately after the rupture occurred, he was discharged later that day with no significant injuries or in-patient hospitalization. The local emergency responders issued a "shelter in place" order for all residents within 4 square miles of the incident that lasted approximately one hour. Over the course of the next couple of weeks williams worked to replace the damaged pipeline to return the line to service as quickly as possible. The line was returned to service on october 23, 2023. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA