Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-11-07 — NV
Operator
Great Basin Gas Transmission Company
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$50,000
Incident datetime
2024-11-07 00:00 UTC
Report number
Location
NV
Narrative
On wednesday, october 9, 2024, aspen developers corporation (aspen developers) was operating a track hoe to complete road work (grading and drainage) in preparation for a water line installation in the sierra nevada mountains, approximately 3.5 miles east of the washoe county census-designated place of incline village, nevada. While performing work on the existing dirt road, the track hoe operator punctured the top of great basin gas transmission company's (great basin) 8-inch diameter north tahoe lateral gas pipeline with a tooth of the track hoe bucket. The damage occurred at the approximate milepost location of nt-13.56 and resulted in the unintentional release of gas from the steel transmission facility. Great basin received notification of the damage at approximately 16:00 pdt on october 9, 2024, by truckee meadows fire and rescue, and promptly dispatched emergency response personnel to the scene for additional investigation and remediation. The pipeline and hazardous material safety administration (PHMSA) notification was made to the national response center (nrc) on october 9, 2024, at 20:14 pdt and assigned incident #1413294 due to the natural gas release anticipated to exceed three million cubic feet. Great basin did not shutdown the facility to avoid service interruption to a downstream shipper (local distribution company). A repair clamp was used to control the flow of gas on october 10, 2024, at 20:49 pdt. A supplemental notification was made to the nrc on october 14, 2024, at 09:08 pdt and assigned incident #1413672. Great basin calculated the total release of gas to total 7,304 mcf . Great basin performed a preliminary internal investigation to determine contributing factors associated with the incident on october 16, 2024, and determined that the facility locate marks, established on august 28, 2024, deviated from the actual facility location by 19 feet and the locator incorrectly marked the facility due to bleed off onto a nearby, unmarked steel water line. Great basin also determined that the facility locate ticket (2024081500260) used by aspen developers was expired as of september 12, 2024. In addition, and as required by great basin through documentation and verbal communications with the excavator, aspen developers did not notify great basin in advance of excavation to request a high pressure standby, nor did aspen developers pothole great basin facilities to verify location and depth. The repair clamp great basin installed on october 10, 2024 to control the flow of gas was welded onto the impacted area as a permanent repair on october 25, 2024.
Detailed record list
Report Received Date
2024-11-07 00:00:00
Iyear
2024
Report Number
20240123
Supplemental Number
40205
Report Type
Original Final
Operator Id
15033
Name
Great Basin Gas Transmission Company
Operator Street Address
P.o. Box 94197
Operator City Name
Las Vegas
Operator State Abbreviation
NV
Operator Postal Code
89193
Time Zone
Pacific
Daylight Savings Ind
Yes
Location Latitude
39.2173
Location Longitude
-119.8938
Nrc Rpt Num
1413294
Additional Nrc Report Numbers
1413672
Commodity Released Type
Natural Gas
Unintentional Release
7304
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
Avoid Service Disruption To Downstream Shipper (Local Distribution Company).
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Operated Upstream Valves To Reduce Pressure To Install A Repair Clamp.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Operated Downstream Valves To Reduce Pressure To Install A Repair Clamp.
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Nv
Onshore Postal Code
89451
Onshore City Name
Not Within A Municipality
Onshore County Name
Washoe
Designated Location
Milepost
Designated Name
Nt-13.56
Pipe Fac Name
North Tahoe Lateral
Segment Name
Nt-13.56
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
24
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
8
Puddle Weld Ind
No
Pipe Wall Thickness
0.188
Pipe Smys
46000
Pipe Specification
Api 5l
Pipe Seam Type
Longitudinal Erw - High Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
Yes
Installation Year
1966
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
1.3
Puncture Circum
1.3
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
126
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
17530
Est Cost Intentional Release
0
Est Cost Prop Damage
50000
Est Cost Emergency
104961
Est Cost Other
0
Gas Cost In Mcf
2.4
Prpty
172491
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
452
Gas Flow In Pipe In Mcf
410.4
Mop Psig
520
Mop Cfr Section
192.619(C)
Maop Established Date
1966-01-04 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Length Segment Isolated
32578
Internal Inspection Ind
No
Diameter Change 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
Yes
Scada Conf Ind
Yes
Accident Identifier
Notification From Emergency Responder
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
This incident was the direct result of an excavation damage. The gas controller actions were prompt and deemed adequate in support of the emergency response and repairs.
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
Yes
Public Row Ind
Yes
Public Subtype
Other
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
Road Work
One Call Notified Ind
Yes
One Call Ticket Num
2.02408e+12
One Call Center Name
Usa North
White Lined Ind
Yes
Locator Type
Facility Owner
Visible Marks
Yes
Service Interruption
No
Root Cause Category
Notification Issue
Root Cause Type
Excavator Dug After Valid Ticket Expired
Preparer Name
K***** C******
Preparer Title
Manager Engineering
Preparer Email
K*************@s****.com
Preparer Telephone
7753153829
Local Contact Name
K***** C******
Local Contact Email
K*************@s****.com
Local Contact Telephone
7753153829
Authorizer Name
C***** H******
Authorizer Title
Director Gas Operations
Authorizer Telephone
7758872805
Authorizer Email
C*************@s****.com
Narrative
On wednesday, october 9, 2024, aspen developers corporation (aspen developers) was operating a track hoe to complete road work (grading and drainage) in preparation for a water line installation in the sierra nevada mountains, approximately 3.5 miles east of the washoe county census-designated place of incline village, nevada. While performing work on the existing dirt road, the track hoe operator punctured the top of great basin gas transmission company's (great basin) 8-inch diameter north tahoe lateral gas pipeline with a tooth of the track hoe bucket. The damage occurred at the approximate milepost location of nt-13.56 and resulted in the unintentional release of gas from the steel transmission facility. Great basin received notification of the damage at approximately 16:00 pdt on october 9, 2024, by truckee meadows fire and rescue, and promptly dispatched emergency response personnel to the scene for additional investigation and remediation. The pipeline and hazardous material safety administration (PHMSA) notification was made to the national response center (nrc) on october 9, 2024, at 20:14 pdt and assigned incident #1413294 due to the natural gas release anticipated to exceed three million cubic feet. Great basin did not shutdown the facility to avoid service interruption to a downstream shipper (local distribution company). A repair clamp was used to control the flow of gas on october 10, 2024, at 20:49 pdt. A supplemental notification was made to the nrc on october 14, 2024, at 09:08 pdt and assigned incident #1413672. Great basin calculated the total release of gas to total 7,304 mcf . Great basin performed a preliminary internal investigation to determine contributing factors associated with the incident on october 16, 2024, and determined that the facility locate marks, established on august 28, 2024, deviated from the actual facility location by 19 feet and the locator incorrectly marked the facility due to bleed off onto a nearby, unmarked steel water line. Great basin also determined that the facility locate ticket (2024081500260) used by aspen developers was expired as of september 12, 2024. In addition, and as required by great basin through documentation and verbal communications with the excavator, aspen developers did not notify great basin in advance of excavation to request a high pressure standby, nor did aspen developers pothole great basin facilities to verify location and depth. The repair clamp great basin installed on october 10, 2024 to control the flow of gas was welded onto the impacted area as a permanent repair on october 25, 2024.
| Report Received Date | 2024-11-07 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240123 |
| Supplemental Number | 40205 |
| Report Type | Original Final |
| Operator Id | 15033 PHMSA Enforcement |
| Name | Great Basin Gas Transmission Company |
| Operator Street Address | P.o. Box 94197 |
| Operator City Name | Las Vegas |
| Operator State Abbreviation | NV |
| Operator Postal Code | 89193 |
| Time Zone | Pacific |
| Daylight Savings Ind | Yes |
| Location Latitude | 39.2173 Google Maps OpenStreetMap |
| Location Longitude | -119.8938 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1413294 NRC Report How to search |
| Additional Nrc Report Numbers | 1413672 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 7304 |
| 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 | Avoid Service Disruption To Downstream Shipper (Local Distribution Company). |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Operated Upstream Valves To Reduce Pressure To Install A Repair Clamp. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Operated Downstream Valves To Reduce Pressure To Install A Repair Clamp. |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Nv |
| Onshore Postal Code | 89451 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Washoe |
| Designated Location | Milepost |
| Designated Name | Nt-13.56 |
| Pipe Fac Name | North Tahoe Lateral |
| Segment Name | Nt-13.56 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 24 |
| 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 | 8 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.188 |
| Pipe Smys | 46000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Longitudinal Erw - High Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Yes |
| Installation Year | 1966 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Puncture Axial | 1.3 |
| Puncture Circum | 1.3 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 126 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 17530 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 50000 |
| Est Cost Emergency | 104961 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.4 |
| Prpty | 172491 |
| 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 | 452 |
| Gas Flow In Pipe In Mcf | 410.4 |
| Mop Psig | 520 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Maop Established Date | 1966-01-04 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Length Segment Isolated | 32578 |
| Internal Inspection Ind | No |
| Diameter Change 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 | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Notification From Emergency Responder |
| 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 | This incident was the direct result of an excavation damage. The gas controller actions were prompt and deemed adequate in support of the emergency response and repairs. |
| 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 | Yes |
| Public Row Ind | Yes |
| Public Subtype | Other |
| 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 | Road Work |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 2.02408e+12 |
| One Call Center Name | Usa North |
| White Lined Ind | Yes |
| Locator Type | Facility Owner |
| Visible Marks | Yes |
| Service Interruption | No |
| Root Cause Category | Notification Issue |
| Root Cause Type | Excavator Dug After Valid Ticket Expired |
| Preparer Name | K***** C****** |
| Preparer Title | Manager Engineering |
| Preparer Email | K*************@s****.com |
| Preparer Telephone | 7753153829 |
| Local Contact Name | K***** C****** |
| Local Contact Email | K*************@s****.com |
| Local Contact Telephone | 7753153829 |
| Authorizer Name | C***** H****** |
| Authorizer Title | Director Gas Operations |
| Authorizer Telephone | 7758872805 |
| Authorizer Email | C*************@s****.com |
| Narrative | On wednesday, october 9, 2024, aspen developers corporation (aspen developers) was operating a track hoe to complete road work (grading and drainage) in preparation for a water line installation in the sierra nevada mountains, approximately 3.5 miles east of the washoe county census-designated place of incline village, nevada. While performing work on the existing dirt road, the track hoe operator punctured the top of great basin gas transmission company's (great basin) 8-inch diameter north tahoe lateral gas pipeline with a tooth of the track hoe bucket. The damage occurred at the approximate milepost location of nt-13.56 and resulted in the unintentional release of gas from the steel transmission facility. Great basin received notification of the damage at approximately 16:00 pdt on october 9, 2024, by truckee meadows fire and rescue, and promptly dispatched emergency response personnel to the scene for additional investigation and remediation. The pipeline and hazardous material safety administration (PHMSA) notification was made to the national response center (nrc) on october 9, 2024, at 20:14 pdt and assigned incident #1413294 due to the natural gas release anticipated to exceed three million cubic feet. Great basin did not shutdown the facility to avoid service interruption to a downstream shipper (local distribution company). A repair clamp was used to control the flow of gas on october 10, 2024, at 20:49 pdt. A supplemental notification was made to the nrc on october 14, 2024, at 09:08 pdt and assigned incident #1413672. Great basin calculated the total release of gas to total 7,304 mcf . Great basin performed a preliminary internal investigation to determine contributing factors associated with the incident on october 16, 2024, and determined that the facility locate marks, established on august 28, 2024, deviated from the actual facility location by 19 feet and the locator incorrectly marked the facility due to bleed off onto a nearby, unmarked steel water line. Great basin also determined that the facility locate ticket (2024081500260) used by aspen developers was expired as of september 12, 2024. In addition, and as required by great basin through documentation and verbal communications with the excavator, aspen developers did not notify great basin in advance of excavation to request a high pressure standby, nor did aspen developers pothole great basin facilities to verify location and depth. The repair clamp great basin installed on october 10, 2024 to control the flow of gas was welded onto the impacted area as a permanent repair on october 25, 2024. |
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