Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2019-05-16 — IL
Operator
Ameren Illinois Company
Cause
Excavation Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$37,522
Incident datetime
2019-05-16 11:25
Report number
Location
IL, JEFFERSON
Narrative
Report updated and marked final with final cost on 12/20/2019. Second party contractor for ameren illinois was excavating to expose a 10" gas main for maintenance. Contractor had called julie (illinois one-call) for a locate request. Ameren illinois gas did not appear on the locate request, reportedly due to a ticket entry error by the one-call center. The contract locator was notified to locate the vicinity for a different utility, and attempted to locate the gas line since the contractor also locates for ameren illinois. The locator could not completely mark the gas facilities due to standing water on the ground, he was able to mark only a portion of the main and not the 3/4" service that was ultimately damaged. The locator reportedly contacted the excavator to notify that he could not complete the locate due to water. The excavator proceeded to dig to excavate the main and damaged the buried, unmarked 3/4" steel high pressure gas service, tearing the service in two downstream of the service tee off the main. Ameren illinois isolated the damage by installing two 10" line stoppers and running a bypass to keep gas service to downstream communities. Due to very wet ground conditions and depth of pipe, the emergency response took a little over two days to get the line safely shut down to make the service repairs. Initial estimates during the response indicated that the gas loss would not exceed the incident reporting threshold of 3000 mcf. Once the line was shut down and the damage was analyzed, it was determined that the size of punch (orifice) in the service tee was larger than estimated resulting in a total loss of 7040 mcf. It was at this time on 5/18/2019 that it was determined the threshold for an incident had been met and the nrc was notified. The line was subsequently placed back into normal service on 5/18/2019 with one service interruption to the effected customer.
Detailed record list
Occurred At
2019-05-16 11:25:00
Year
2019
Report Received Date
2019-06-18 00:00:00
Iyear
2019.0
Report Number
20190060.0
Supplemental Number
33124.0
Report Type
Supplemental Final
Operator Id
32513
Name
Ameren Illinois Company
Operator Street Address
10 Executive Dr.
Operator City Name
Collinsville
Operator State Abbreviation
IL
Operator Postal Code
62234
Local Datetime
2019-05-16 11:25:00
Location Street Address
20275 N Old Centralia Ln
Location City Name
Dix
Location County Name
Jefferson
Location State Abbreviation
IL
Location Postal Code
62830
Location Latitude
38.41920853
Location Longitude
-88.99169922
Nrc Rpt Datetime
2019-05-18 15:33:00
Nrc Rpt Num
1246077
Commodity Released Type
Natural Gas
Unintentional Release
7040.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
1.0
Incident Identified Datetime
2019-05-16 11:25:00
On Site Datetime
2019-05-16 11:30:00
Federal
No
Location Type
Utility Right-Of-Way / Easement
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
41.0
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Service
Installation Year
2018.0
Pipe Diameter
0.75
Pipe Specification
Astm A106
Pipe Manufacturer
Michigan Seamless Tube
Material Involved
Steel
Steel Seam Type
Seamless
Steel Seam Type Details
Seamless
Wt Steel
0.113
Release Type
Rupture
Rupture Orient
Circumferential
Rupture Length
1
Rupture Width
0.7
Class Location Type
Class 1 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
37522.0
Est Cost Emergency
155412.0
Est Cost Other
0.0
Est Cost Unintentional Release
25013.0
Prpty
217947.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
1.0
Accident Psig
700.0
Normal Psig
704.0
Mop Psig
720.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
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
While gas control does monitor the adjacent pressure system, it would not detect the rate of gas release from this 3/4" service which was pulled apart during the damage.
Employee Drug Test Ind
No
Contractor Drug Test Ind
Yes
Num Contractors Tested
1
Num Contractors Failed
0
Cause
Excavation Damage
Cause Details
Excavation Damage By Operator's Contractor (Second Party)
Ex Party Type
Excavation Damage By Operator's Contractor (Second Party)
Notify Cga Dirt
No
Pipeline Easement Row Ind
Yes
Excavator Type
Contractor
Excavator Equipment
Backhoe/trackhoe
Work Performed
Natural Gas
One Call Notified Ind
Yes
One Call Ticket Num
1283576
One Call Center Name
Illinois - Julie
Locator Type
Contract Locator
Visible Marks
No
Service Interruption
Yes
Service Interruption Hours
23.0
Root Cause Category
Excavation Issue
Root Cause Type
Improper Backfilling Practices
Preparer Name
J*** B******
Preparer Title
Director Pipeline Safety And Quality Mgmt
Preparer Email
J*******@a*****.com
Preparer Telephone
217-625-6854
Authorizer Name
J*** B******
Authorizer Title
Director Pipeline Safety And Quality Mgmt
Authorizer Telephone
217-625-6854
Authorizer Email
J*******@a*****.com
Narrative
Report updated and marked final with final cost on 12/20/2019. Second party contractor for ameren illinois was excavating to expose a 10" gas main for maintenance. Contractor had called julie (illinois one-call) for a locate request. Ameren illinois gas did not appear on the locate request, reportedly due to a ticket entry error by the one-call center. The contract locator was notified to locate the vicinity for a different utility, and attempted to locate the gas line since the contractor also locates for ameren illinois. The locator could not completely mark the gas facilities due to standing water on the ground, he was able to mark only a portion of the main and not the 3/4" service that was ultimately damaged. The locator reportedly contacted the excavator to notify that he could not complete the locate due to water. The excavator proceeded to dig to excavate the main and damaged the buried, unmarked 3/4" steel high pressure gas service, tearing the service in two downstream of the service tee off the main. Ameren illinois isolated the damage by installing two 10" line stoppers and running a bypass to keep gas service to downstream communities. Due to very wet ground conditions and depth of pipe, the emergency response took a little over two days to get the line safely shut down to make the service repairs. Initial estimates during the response indicated that the gas loss would not exceed the incident reporting threshold of 3000 mcf. Once the line was shut down and the damage was analyzed, it was determined that the size of punch (orifice) in the service tee was larger than estimated resulting in a total loss of 7040 mcf. It was at this time on 5/18/2019 that it was determined the threshold for an incident had been met and the nrc was notified. The line was subsequently placed back into normal service on 5/18/2019 with one service interruption to the effected customer.
| Occurred At | 2019-05-16 11:25:00 |
|---|---|
| Year | 2019 |
| Report Received Date | 2019-06-18 00:00:00 |
| Iyear | 2019.0 |
| Report Number | 20190060.0 |
| Supplemental Number | 33124.0 |
| Report Type | Supplemental Final |
| Operator Id | 32513 PHMSA Enforcement |
| Name | Ameren Illinois Company |
| Operator Street Address | 10 Executive Dr. |
| Operator City Name | Collinsville |
| Operator State Abbreviation | IL |
| Operator Postal Code | 62234 |
| Local Datetime | 2019-05-16 11:25:00 |
| Location Street Address | 20275 N Old Centralia Ln |
| Location City Name | Dix |
| Location County Name | Jefferson |
| Location State Abbreviation | IL |
| Location Postal Code | 62830 |
| Location Latitude | 38.41920853 Google Maps OpenStreetMap |
| Location Longitude | -88.99169922 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2019-05-18 15:33:00 |
| Nrc Rpt Num | 1246077 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 7040.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 1.0 |
| Incident Identified Datetime | 2019-05-16 11:25:00 |
| On Site Datetime | 2019-05-16 11:30:00 |
| Federal | No |
| Location Type | Utility Right-Of-Way / Easement |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 41.0 |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Service |
| Installation Year | 2018.0 |
| Pipe Diameter | 0.75 |
| Pipe Specification | Astm A106 |
| Pipe Manufacturer | Michigan Seamless Tube |
| Material Involved | Steel |
| Steel Seam Type | Seamless |
| Steel Seam Type Details | Seamless |
| Wt Steel | 0.113 |
| Release Type | Rupture |
| Rupture Orient | Circumferential |
| Rupture Length | 1 |
| Rupture Width | 0.7 |
| Class Location Type | Class 1 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 37522.0 |
| Est Cost Emergency | 155412.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 25013.0 |
| Prpty | 217947.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 1.0 |
| Accident Psig | 700.0 |
| Normal Psig | 704.0 |
| Mop Psig | 720.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| 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 | While gas control does monitor the adjacent pressure system, it would not detect the rate of gas release from this 3/4" service which was pulled apart during the damage. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | Yes |
| Num Contractors Tested | 1 |
| Num Contractors Failed | 0 |
| Cause | Excavation Damage |
| Cause Details | Excavation Damage By Operator's Contractor (Second Party) |
| Ex Party Type | Excavation Damage By Operator's Contractor (Second Party) |
| Notify Cga Dirt | No |
| Pipeline Easement Row Ind | Yes |
| Excavator Type | Contractor |
| Excavator Equipment | Backhoe/trackhoe |
| Work Performed | Natural Gas |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 1283576 |
| One Call Center Name | Illinois - Julie |
| Locator Type | Contract Locator |
| Visible Marks | No |
| Service Interruption | Yes |
| Service Interruption Hours | 23.0 |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Improper Backfilling Practices |
| Preparer Name | J*** B****** |
| Preparer Title | Director Pipeline Safety And Quality Mgmt |
| Preparer Email | J*******@a*****.com |
| Preparer Telephone | 217-625-6854 |
| Authorizer Name | J*** B****** |
| Authorizer Title | Director Pipeline Safety And Quality Mgmt |
| Authorizer Telephone | 217-625-6854 |
| Authorizer Email | J*******@a*****.com |
| Narrative | Report updated and marked final with final cost on 12/20/2019. Second party contractor for ameren illinois was excavating to expose a 10" gas main for maintenance. Contractor had called julie (illinois one-call) for a locate request. Ameren illinois gas did not appear on the locate request, reportedly due to a ticket entry error by the one-call center. The contract locator was notified to locate the vicinity for a different utility, and attempted to locate the gas line since the contractor also locates for ameren illinois. The locator could not completely mark the gas facilities due to standing water on the ground, he was able to mark only a portion of the main and not the 3/4" service that was ultimately damaged. The locator reportedly contacted the excavator to notify that he could not complete the locate due to water. The excavator proceeded to dig to excavate the main and damaged the buried, unmarked 3/4" steel high pressure gas service, tearing the service in two downstream of the service tee off the main. Ameren illinois isolated the damage by installing two 10" line stoppers and running a bypass to keep gas service to downstream communities. Due to very wet ground conditions and depth of pipe, the emergency response took a little over two days to get the line safely shut down to make the service repairs. Initial estimates during the response indicated that the gas loss would not exceed the incident reporting threshold of 3000 mcf. Once the line was shut down and the damage was analyzed, it was determined that the size of punch (orifice) in the service tee was larger than estimated resulting in a total loss of 7040 mcf. It was at this time on 5/18/2019 that it was determined the threshold for an incident had been met and the nrc was notified. The line was subsequently placed back into normal service on 5/18/2019 with one service interruption to the effected customer. |
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