GTG incident on 2024-06-29 — UT

Operator
Enbridge Gas Utah/ Wyoming/idaho
Cause
Locating Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities 0 injuries
Property damage (nominal)
$0
Incident datetime
2024-06-29 00:00 UTC
Report number
Location
UT
Narrative
Enbridge gas (company) high pressure pipeline (fl052) was damaged on 5/28/2024 at 1987 w erda way, tooele at approximately 1200' south of the tooele valley airport by a third party contractor while excavating for a pressurized 4" sewer line. The 14" hp pipe incurred a 4" hole from a trackhoe striking the pipe causing a release of gas. Company high pressure personnel had the line isolated, blown down, and secured at approx. 12:27 on 5/28/2024. Repairs were made by cutting out and replacing a 13' 9" pre-tested pipe section of x52, 0.375 wall pipe. Pipeline was then purged and gas was introduced into the feederline on wednesday, 05/29/2024 at 11:38. Stations to0009 and bird cage wa1515 where then turned back on by measurement and control with the line being fully operational. Note: all associated costs are still being determined and will be provided on the supplemental or final report.
Detailed record list
Report Received Date
2024-06-29 00:00:00
Iyear
2024
Report Number
20240087
Supplemental Number
39736
Report Type
Original
Operator Id
12876
PHMSA Enforcement
Name
Enbridge Gas Utah/ Wyoming/idaho
Operator Street Address
333 South State Street P.o. Box 45360
Operator City Name
Salt Lake City
Operator State Abbreviation
UT
Operator Postal Code
84111
Time Zone
Mountain
Daylight Savings Ind
Yes
Location Latitude
40.597283
Google Maps OpenStreetMap
Location Longitude
-112.35091
Google Maps OpenStreetMap
Nrc Rpt Num
1400298
NRC Report How to search
Additional Nrc Report Numbers
1400487
Commodity Released Type
Natural Gas
Unintentional Release
12125.2
Intentional Release
700
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
Operator
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Ut
Onshore Postal Code
84074
Onshore City Name
Tooele
Onshore County Name
Tooele
Designated Location
Not Applicable
Pipe Fac Name
Fl052
Segment Name
None
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
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
14
Puddle Weld Ind
No
Pipe Wall Thickness
0.25
Pipe Smys
42000
Pipe Specification
Api 5l
Pipe Seam Type
Longitudinal Erw - Unknown Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
Unknown
Installation Year
1971
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
4
Puncture Circum
4
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
182
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
0
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
0
Prpty
0
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
300
Gas Flow In Pipe In Mcf
0
Mop Psig
354
Mop Cfr Section
192.619(A)(4)
View CFR 49 §192
Maop Established Date
2010-12-30 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
Yes
Gas Odorized Ind
Yes
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
13200
Internal Inspection Ind
No
Diameter Change Ind
Yes
Other Inspection Ind
Yes
Internal Inspection Details
No Receiver Facility.
Operation Complications Ind
Yes
Low Flow Ind
Yes
Pipeline Function
Transmission Line Of Distribution System
Scada In Place Ind
No
Accident Identifier
Notification From Third Party That Caused The Incident
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
Due to the cause being a third party damage.
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
Yes
One Call System Ind
Yes
State Law Exempt Ind
No
Notify Cga Dirt
No
Pipeline Easement Row Ind
Yes
Joint Trench Ind
No
Cross Bore Ind
No
Depth Of Grade
18� � 36�
Excavator Type
Contractor
Excavator Equipment
Backhoe/trackhoe
Work Performed
Sewer (Sanitary/storm)
One Call Notified Ind
Yes
One Call Ticket Num
C041310119
One Call Center Name
Elm
White Lined Ind
No
Locator Type
Contract Locator
Visible Marks
No
Service Interruption
No
Root Cause Category
Locating Issue
Root Cause Type
Facility Not Marked Due To Incomplete Marks At Damage Location
Excvtn Dmg Third Party Ind
Yes
Preparer Name
S**** B******
Preparer Title
Supervisor Gas Operations
Preparer Email
S************@d*************.com
Preparer Telephone
801-548-7520
Local Contact Name
S**** B******
Local Contact Email
S************@d*************.com
Local Contact Telephone
801-548-7520
Authorizer Name
R*** J******
Authorizer Title
Manager Gas Operations
Authorizer Telephone
801-574-0111
Authorizer Email
R***********@d*************.com
Narrative
Enbridge gas (company) high pressure pipeline (fl052) was damaged on 5/28/2024 at 1987 w erda way, tooele at approximately 1200' south of the tooele valley airport by a third party contractor while excavating for a pressurized 4" sewer line. The 14" hp pipe incurred a 4" hole from a trackhoe striking the pipe causing a release of gas. Company high pressure personnel had the line isolated, blown down, and secured at approx. 12:27 on 5/28/2024. Repairs were made by cutting out and replacing a 13' 9" pre-tested pipe section of x52, 0.375 wall pipe. Pipeline was then purged and gas was introduced into the feederline on wednesday, 05/29/2024 at 11:38. Stations to0009 and bird cage wa1515 where then turned back on by measurement and control with the line being fully operational. Note: all associated costs are still being determined and will be provided on the supplemental or final report.
Report Received Date 2024-06-29 00:00:00
Iyear 2024
Report Number 20240087
Supplemental Number 39736
Report Type Original
Operator Id 12876 PHMSA Enforcement
Name Enbridge Gas Utah/ Wyoming/idaho
Operator Street Address 333 South State Street P.o. Box 45360
Operator City Name Salt Lake City
Operator State Abbreviation UT
Operator Postal Code 84111
Time Zone Mountain
Daylight Savings Ind Yes
Location Latitude 40.597283 Google Maps OpenStreetMap
Location Longitude -112.35091 Google Maps OpenStreetMap
Nrc Rpt Num 1400298 NRC Report How to search
Additional Nrc Report Numbers 1400487
Commodity Released Type Natural Gas
Unintentional Release 12125.2
Intentional Release 700
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 Operator
Ignite Ind No
Upstream Action Taken Valve Closure
Downstream Action Taken Valve Closure
Num Pub Evacuated 0
On Off Shore Onshore
Onshore State Abbreviation Ut
Onshore Postal Code 84074
Onshore City Name Tooele
Onshore County Name Tooele
Designated Location Not Applicable
Pipe Fac Name Fl052
Segment Name None
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 Intrastate
System Part Involved Onshore Pipeline, Including Valve Sites
Item Involved Pipe
Pipe Type Pipe Body
Pipe Diameter 14
Puddle Weld Ind No
Pipe Wall Thickness 0.25
Pipe Smys 42000
Pipe Specification Api 5l
Pipe Seam Type Longitudinal Erw - Unknown Frequency
Pipe Manufacturer Unknown
Pipe Coating Type Coal Tar
Coating Applied Ind Unknown
Installation Year 1971
Manufactured Year Unknown
Material Involved Carbon Steel
Release Type Mechanical Puncture
Puncture Axial 4
Puncture Circum 4
Class Location Type Class 1 Location
Could Be Hca No
Pir Radius 182
Heat Damage Ind No
Non Heat Damage Ind No
Did Occur In Mca Ind No
Est Cost Oper Paid 0
Est Cost Unintentional Release 0
Est Cost Intentional Release 0
Est Cost Prop Damage 0
Est Cost Emergency 0
Est Cost Other 0
Gas Cost In Mcf 0
Prpty 0
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 300
Gas Flow In Pipe In Mcf 0
Mop Psig 354
Mop Cfr Section 192.619(A)(4) View CFR 49 §192
Maop Established Date 2010-12-30 00:00:00
Maop Reversal Flow Ind No
Accident Pressure Pressure Did Not Exceed Maop
Pressure Restriction Ind No
Gas Required Odorized Ind Yes
Gas Odorized Ind Yes
Upstream Valve Type Ind Manual
Downstream Valve Type Ind Manual
Length Segment Isolated 13200
Internal Inspection Ind No
Diameter Change Ind Yes
Other Inspection Ind Yes
Internal Inspection Details No Receiver Facility.
Operation Complications Ind Yes
Low Flow Ind Yes
Pipeline Function Transmission Line Of Distribution System
Scada In Place Ind No
Accident Identifier Notification From Third Party That Caused The Incident
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 Due to the cause being a third party damage.
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 Yes
One Call System Ind Yes
State Law Exempt Ind No
Notify Cga Dirt No
Pipeline Easement Row Ind Yes
Joint Trench Ind No
Cross Bore Ind No
Depth Of Grade 18� � 36�
Excavator Type Contractor
Excavator Equipment Backhoe/trackhoe
Work Performed Sewer (Sanitary/storm)
One Call Notified Ind Yes
One Call Ticket Num C041310119
One Call Center Name Elm
White Lined Ind No
Locator Type Contract Locator
Visible Marks No
Service Interruption No
Root Cause Category Locating Issue
Root Cause Type Facility Not Marked Due To Incomplete Marks At Damage Location
Excvtn Dmg Third Party Ind Yes
Preparer Name S**** B******
Preparer Title Supervisor Gas Operations
Preparer Email S************@d*************.com
Preparer Telephone 801-548-7520
Local Contact Name S**** B******
Local Contact Email S************@d*************.com
Local Contact Telephone 801-548-7520
Authorizer Name R*** J******
Authorizer Title Manager Gas Operations
Authorizer Telephone 801-574-0111
Authorizer Email R***********@d*************.com
Narrative Enbridge gas (company) high pressure pipeline (fl052) was damaged on 5/28/2024 at 1987 w erda way, tooele at approximately 1200' south of the tooele valley airport by a third party contractor while excavating for a pressurized 4" sewer line. The 14" hp pipe incurred a 4" hole from a trackhoe striking the pipe causing a release of gas. Company high pressure personnel had the line isolated, blown down, and secured at approx. 12:27 on 5/28/2024. Repairs were made by cutting out and replacing a 13' 9" pre-tested pipe section of x52, 0.375 wall pipe. Pipeline was then purged and gas was introduced into the feederline on wednesday, 05/29/2024 at 11:38. Stations to0009 and bird cage wa1515 where then turned back on by measurement and control with the line being fully operational. Note: all associated costs are still being determined and will be provided on the supplemental or final report.
External Resources
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