Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2015-10-23 — CA
Operator
Pacific Gas & Electric Co
Cause
Excavation Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$300,000
Incident datetime
2015-10-23 11:23
Report number
Location
CA
Narrative
On october 23, 2015 at 1123 hours, pg&e was notified of blowing gas in a field near 5430 putah creek rd. Dixon, solano county. Pg&e gas service representative arrived on site at 1206 hours and a gas pipeline operations and maintenance (gpom) crew at 1245 hours. It was determined that transmission line l-150 at milepoint (mp) 7.23 had been struck by a ripper being pulled in an agricultural field by a bulldozer being operated by nichelini construction. The excavator held a USA ticket #490858 and the pipeline had been properly marked prior to the incident. The operator had made numerous passes over the pipeline but failed to raise the ripper during the pass which struck the pipe. The depth, at which the line was damaged, was approximately 39 inches below the surface of the soil. No injuries, fatalities, or ignition. Damage to the transmission pipeline, including repairs is approximately $300,000. Pg&e secured the area and closed mainline valve v-9.7 at 1504 hours and 90% closed v-5.96 at 1617 hours in order to keep a positive pressure in the shut-in section of pipeline. The flow of gas was completely stopped at 1849 hours. Repairs on the pipeline were completed on 10/23/15 at 2238 hours and the pipeline was restored to normal operation on 10/25/15 at 0140 hours. Gas service to the customers was restored by 10/26/15 at 1330 hours.
Detailed record list
Report Received Date
2015-11-24 00:00:00
Iyear
2015
Report Number
20150139
Supplemental Number
16930
Report Type
Original Final
Operator Id
15007
Name
Pacific Gas & Electric Co
Operator Street Address
6121 Bollinger Canyon Rd.
Operator City Name
San Ramon
Operator State Abbreviation
CA
Operator Postal Code
94583
Local Datetime
2015-10-23 11:23:00
Location Latitude
38.5140764
Location Longitude
-121.8908531
Nrc Rpt Num
1131545
Nrc Rpt Datetime
2015-10-23 14:22:00
Commodity Released Type
Natural Gas
Unintentional Release
2655
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2015-10-23 18:49:00
Restart Datetime
2015-10-25 01:40:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2015-10-23 11:23:00
On Site Datetime
2015-10-23 12:06:00
On Off Shore
Onshore
Onshore State Abbreviation
Ca
Onshore Postal Code
95620
Onshore City Name
Dixon
Onshore County Name
Solano
Designated Location
Milepost
Designated Name
Mile Point
Pipe Fac Name
L-150
Segment Name
Mp 7.23
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
39
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
6
Pipe Wall Thickness
0.28
Pipe Smys
35000
Pipe Specification
Grade B
Pipe Seam Type
Seamless
Pipe Manufacturer
Unknown
Pipe Coating Type
Epoxy
Installation Year
1949
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
6.6
Puncture Circum
20.8
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
52
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
0
Est Cost Intentional Release
0
Est Cost Prop Damage
300000
Est Cost Emergency
0
Est Cost Other
0
Prpty
300000
Accident Psig
118
Mop Psig
125
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
19483
Internal Inspection Ind
No
Other Restrictions Ind
Yes
Operation Complications Ind
Yes
Low Op Pressure Ind
Yes
Low Flow Ind
Yes
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 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
Scada-related equipment operated as intended
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
Notify Cga Dirt
Yes
Private Row Ind
Yes
Private Subtype
Private Landowner
Excavator Type
Contractor
Excavator Equipment
Farm Equipment
Work Performed
Agriculture
One Call Notified Ind
Yes
One Call Ticket Num
490858
One Call Center Name
Usa North 811
Locator Type
Utility Owner
Visible Marks
Yes
Service Interruption
Yes
Service Interruption Hours
1470
Root Cause Category
Excavation Issue
Root Cause Type
Excavator Failed To Maintain Clearance After Verifying Marks
Preparer Name
S****** R****
Preparer Title
Compliance Engineer
Preparer Email
S***@p**.com
Preparer Telephone
925-328-6107
Authorizer Name
L**** D*******
Authorizer Title
Manager Of Regulatory Compliance
Authorizer Telephone
925-328-5756
Authorizer Email
L***@p**.com
Narrative
On october 23, 2015 at 1123 hours, pg&e was notified of blowing gas in a field near 5430 putah creek rd. Dixon, solano county. Pg&e gas service representative arrived on site at 1206 hours and a gas pipeline operations and maintenance (gpom) crew at 1245 hours. It was determined that transmission line l-150 at milepoint (mp) 7.23 had been struck by a ripper being pulled in an agricultural field by a bulldozer being operated by nichelini construction. The excavator held a USA ticket #490858 and the pipeline had been properly marked prior to the incident. The operator had made numerous passes over the pipeline but failed to raise the ripper during the pass which struck the pipe. The depth, at which the line was damaged, was approximately 39 inches below the surface of the soil. No injuries, fatalities, or ignition. Damage to the transmission pipeline, including repairs is approximately $300,000. Pg&e secured the area and closed mainline valve v-9.7 at 1504 hours and 90% closed v-5.96 at 1617 hours in order to keep a positive pressure in the shut-in section of pipeline. The flow of gas was completely stopped at 1849 hours. Repairs on the pipeline were completed on 10/23/15 at 2238 hours and the pipeline was restored to normal operation on 10/25/15 at 0140 hours. Gas service to the customers was restored by 10/26/15 at 1330 hours.
| Report Received Date | 2015-11-24 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150139 |
| Supplemental Number | 16930 |
| Report Type | Original Final |
| Operator Id | 15007 PHMSA Enforcement |
| Name | Pacific Gas & Electric Co |
| Operator Street Address | 6121 Bollinger Canyon Rd. |
| Operator City Name | San Ramon |
| Operator State Abbreviation | CA |
| Operator Postal Code | 94583 |
| Local Datetime | 2015-10-23 11:23:00 |
| Location Latitude | 38.5140764 Google Maps OpenStreetMap |
| Location Longitude | -121.8908531 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1131545 NRC Report How to search |
| Nrc Rpt Datetime | 2015-10-23 14:22:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 2655 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2015-10-23 18:49:00 |
| Restart Datetime | 2015-10-25 01:40:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2015-10-23 11:23:00 |
| On Site Datetime | 2015-10-23 12:06:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 95620 |
| Onshore City Name | Dixon |
| Onshore County Name | Solano |
| Designated Location | Milepost |
| Designated Name | Mile Point |
| Pipe Fac Name | L-150 |
| Segment Name | Mp 7.23 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 39 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 6 |
| Pipe Wall Thickness | 0.28 |
| Pipe Smys | 35000 |
| Pipe Specification | Grade B |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Epoxy |
| Installation Year | 1949 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Puncture Axial | 6.6 |
| Puncture Circum | 20.8 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 52 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 0 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 300000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 300000 |
| Accident Psig | 118 |
| Mop Psig | 125 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 19483 |
| Internal Inspection Ind | No |
| Other Restrictions Ind | Yes |
| Operation Complications Ind | Yes |
| Low Op Pressure Ind | Yes |
| Low Flow Ind | Yes |
| 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 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 | Scada-related equipment operated as intended |
| 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 |
| Notify Cga Dirt | Yes |
| Private Row Ind | Yes |
| Private Subtype | Private Landowner |
| Excavator Type | Contractor |
| Excavator Equipment | Farm Equipment |
| Work Performed | Agriculture |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 490858 |
| One Call Center Name | Usa North 811 |
| Locator Type | Utility Owner |
| Visible Marks | Yes |
| Service Interruption | Yes |
| Service Interruption Hours | 1470 |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Excavator Failed To Maintain Clearance After Verifying Marks |
| Preparer Name | S****** R**** |
| Preparer Title | Compliance Engineer |
| Preparer Email | S***@p**.com |
| Preparer Telephone | 925-328-6107 |
| Authorizer Name | L**** D******* |
| Authorizer Title | Manager Of Regulatory Compliance |
| Authorizer Telephone | 925-328-5756 |
| Authorizer Email | L***@p**.com |
| Narrative | On october 23, 2015 at 1123 hours, pg&e was notified of blowing gas in a field near 5430 putah creek rd. Dixon, solano county. Pg&e gas service representative arrived on site at 1206 hours and a gas pipeline operations and maintenance (gpom) crew at 1245 hours. It was determined that transmission line l-150 at milepoint (mp) 7.23 had been struck by a ripper being pulled in an agricultural field by a bulldozer being operated by nichelini construction. The excavator held a USA ticket #490858 and the pipeline had been properly marked prior to the incident. The operator had made numerous passes over the pipeline but failed to raise the ripper during the pass which struck the pipe. The depth, at which the line was damaged, was approximately 39 inches below the surface of the soil. No injuries, fatalities, or ignition. Damage to the transmission pipeline, including repairs is approximately $300,000. Pg&e secured the area and closed mainline valve v-9.7 at 1504 hours and 90% closed v-5.96 at 1617 hours in order to keep a positive pressure in the shut-in section of pipeline. The flow of gas was completely stopped at 1849 hours. Repairs on the pipeline were completed on 10/23/15 at 2238 hours and the pipeline was restored to normal operation on 10/25/15 at 0140 hours. Gas service to the customers was restored by 10/26/15 at 1330 hours. |
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