Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2012-11-30 — CA
Operator
Pacific Gas & Electric Co
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$350,000
Incident datetime
2012-11-30 09:54
Report number
Location
CA
Narrative
On november 30, 2012 at approximately 0954 hours a third party excavator (madera irrigation district) struck and severely damaged pacific gas and electric company's (pg&e) 12-inch natural gas transmission line 118b at mile point 7.8, resulting in a release of gas. The third party excavator was using a tractor with a blade to clean out the bottom of a dry creek and did not comply with excavation damage prevention regulations by failing to call USA prior to excavation. Gas pipeline markers were in place. Pg&e representatives arrived on-site at 1010 hours. Pg&e crews isolated the damaged section of pipeline by closing tap valves and main line valves. The flow of gas was brought down from 370 psig to 4 psig at 1430 hours. The three feet of damaged pipeline was replaced with 12-inch od, 0.281 inch wt, x-42, pre-tested pipe. The repair work was completed at approximately 1215 hours on december 1, 2012. Eleven customers experienced gas service interruption and all eleven services were restored by 1730 hours on december 1, 2012. The temporary installation of compressed natural gas was used to maintain gas service to many of the surrounding customers. Out of an abundance of caution, northbound and southbound highway 99 and the adjacent railroad were shut down, and the area was evacuated within a half mile radius. There were no injuries, no fatalities and no ignition as a result of this incident. This incident was reported to both the DOT and the cpuc because the cost of damages exceeded $50,000, and the volume of unintentionally released gas was greater than 3 mmcf. In addition, sacramento major tv news media channels 30 and 47 were observed on-scene.
Detailed record list
Report Received Date
2012-12-28 00:00:00
Iyear
2012
Report Number
20120129
Supplemental Number
16275
Report Type
Supplemental 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
2012-11-30 09:54:00
Location Latitude
36.92201281
Location Longitude
-120.0192831
Nrc Rpt Num
1031956
Nrc Rpt Datetime
2012-11-30 11:40:00
Commodity Released Type
Natural Gas
Unintentional Release
7010
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Incident Identified Datetime
2012-11-30 09:54:00
On Site Datetime
2012-11-30 10:10:00
On Off Shore
Onshore
Onshore State Abbreviation
Ca
Onshore Postal Code
93637
Onshore City Name
Madera
Onshore County Name
Madera
Designated Location
Milepost
Designated Name
7.8
Pipe Fac Name
118b
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
10
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
12.75
Pipe Wall Thickness
0.25
Pipe Smys
42000
Pipe Specification
12.75" Od 0.25" Wt X42 Erw
Pipe Seam Type
Longitudinal Erw - Unknown Frequency
Pipe Coating Type
Asphalt
Installation Year
1965
Manufactured Year
1965
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
166
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
450
Est Cost Unintentional Release
10450
Est Cost Intentional Release
3000
Est Cost Prop Damage
350000
Est Cost Emergency
0
Est Cost Other
0
Prpty
363900
Accident Psig
370
Mop Psig
400
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
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 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
Incident caused by third party dig-in
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
Notify Cga Dirt
No
Pipeline Easement Row Ind
Yes
Excavator Type
Unknown/other
Excavator Equipment
Grader/scraper
Work Performed
Grading
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
Unknown/other
Service Interruption
Yes
Service Interruption Hours
27
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
N***** B***
Preparer Title
Associate Gas Engineer
Preparer Email
N***@p**.com
Preparer Telephone
925-322-3311
Authorizer Name
L******* D*******
Authorizer Title
Acting Manager
Authorizer Telephone
925-328-5756
Authorizer Email
L***@p**.com
Narrative
On november 30, 2012 at approximately 0954 hours a third party excavator (madera irrigation district) struck and severely damaged pacific gas and electric company's (pg&e) 12-inch natural gas transmission line 118b at mile point 7.8, resulting in a release of gas. The third party excavator was using a tractor with a blade to clean out the bottom of a dry creek and did not comply with excavation damage prevention regulations by failing to call USA prior to excavation. Gas pipeline markers were in place. Pg&e representatives arrived on-site at 1010 hours. Pg&e crews isolated the damaged section of pipeline by closing tap valves and main line valves. The flow of gas was brought down from 370 psig to 4 psig at 1430 hours. The three feet of damaged pipeline was replaced with 12-inch od, 0.281 inch wt, x-42, pre-tested pipe. The repair work was completed at approximately 1215 hours on december 1, 2012. Eleven customers experienced gas service interruption and all eleven services were restored by 1730 hours on december 1, 2012. The temporary installation of compressed natural gas was used to maintain gas service to many of the surrounding customers. Out of an abundance of caution, northbound and southbound highway 99 and the adjacent railroad were shut down, and the area was evacuated within a half mile radius. There were no injuries, no fatalities and no ignition as a result of this incident. This incident was reported to both the DOT and the cpuc because the cost of damages exceeded $50,000, and the volume of unintentionally released gas was greater than 3 mmcf. In addition, sacramento major tv news media channels 30 and 47 were observed on-scene.
| Report Received Date | 2012-12-28 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120129 |
| Supplemental Number | 16275 |
| Report Type | Supplemental 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 | 2012-11-30 09:54:00 |
| Location Latitude | 36.92201281 Google Maps OpenStreetMap |
| Location Longitude | -120.0192831 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1031956 NRC Report How to search |
| Nrc Rpt Datetime | 2012-11-30 11:40:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 7010 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Incident Identified Datetime | 2012-11-30 09:54:00 |
| On Site Datetime | 2012-11-30 10:10:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 93637 |
| Onshore City Name | Madera |
| Onshore County Name | Madera |
| Designated Location | Milepost |
| Designated Name | 7.8 |
| Pipe Fac Name | 118b |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 10 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 12.75 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 42000 |
| Pipe Specification | 12.75" Od 0.25" Wt X42 Erw |
| Pipe Seam Type | Longitudinal Erw - Unknown Frequency |
| Pipe Coating Type | Asphalt |
| Installation Year | 1965 |
| Manufactured Year | 1965 |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 166 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 450 |
| Est Cost Unintentional Release | 10450 |
| Est Cost Intentional Release | 3000 |
| Est Cost Prop Damage | 350000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 363900 |
| Accident Psig | 370 |
| Mop Psig | 400 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted 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 |
| 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 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 | Incident caused by third party dig-in |
| 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 |
| Notify Cga Dirt | No |
| Pipeline Easement Row Ind | Yes |
| Excavator Type | Unknown/other |
| Excavator Equipment | Grader/scraper |
| Work Performed | Grading |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | Unknown/other |
| Service Interruption | Yes |
| Service Interruption Hours | 27 |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | N***** B*** |
| Preparer Title | Associate Gas Engineer |
| Preparer Email | N***@p**.com |
| Preparer Telephone | 925-322-3311 |
| Authorizer Name | L******* D******* |
| Authorizer Title | Acting Manager |
| Authorizer Telephone | 925-328-5756 |
| Authorizer Email | L***@p**.com |
| Narrative | On november 30, 2012 at approximately 0954 hours a third party excavator (madera irrigation district) struck and severely damaged pacific gas and electric company's (pg&e) 12-inch natural gas transmission line 118b at mile point 7.8, resulting in a release of gas. The third party excavator was using a tractor with a blade to clean out the bottom of a dry creek and did not comply with excavation damage prevention regulations by failing to call USA prior to excavation. Gas pipeline markers were in place. Pg&e representatives arrived on-site at 1010 hours. Pg&e crews isolated the damaged section of pipeline by closing tap valves and main line valves. The flow of gas was brought down from 370 psig to 4 psig at 1430 hours. The three feet of damaged pipeline was replaced with 12-inch od, 0.281 inch wt, x-42, pre-tested pipe. The repair work was completed at approximately 1215 hours on december 1, 2012. Eleven customers experienced gas service interruption and all eleven services were restored by 1730 hours on december 1, 2012. The temporary installation of compressed natural gas was used to maintain gas service to many of the surrounding customers. Out of an abundance of caution, northbound and southbound highway 99 and the adjacent railroad were shut down, and the area was evacuated within a half mile radius. There were no injuries, no fatalities and no ignition as a result of this incident. This incident was reported to both the DOT and the cpuc because the cost of damages exceeded $50,000, and the volume of unintentionally released gas was greater than 3 mmcf. In addition, sacramento major tv news media channels 30 and 47 were observed on-scene. |
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