Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2014-11-14 — TX
Operator
Enable Gas Transmission, Llc
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$48,525
Incident datetime
2014-11-14 18:14
Report number
Location
TX
Narrative
Friday 11/14/2014 at 17:17, system control received a call from mr. Gary grady reporting that a natural gas line had been hit by a bulldozer and was blowing gas near okolona, arkansas. System control contacted emmet team personnel to investigate the call. Emmet team personnel contacted mr. Grady to determine the location and situation. Additional personnel were called out to assist with responding to the leak. At 18:14, emmet team personnel confirmed that line am-153 was leaking gas. The site of the leak was reported to be at gps coordinates -93.36972716 w, 34.01297563 n. The site of the leak was approximately 1.5 miles west along the pipeline from the okolona city limits in section 29 township 8s and range 22w of clark county. The leak was later determined to be at station 695+18 on line am-153. The pipeline was marked with carsonite markers and buried approximately 30 inches deep at the leak site. Additional signs were added once repair was made. Mr. Grady told emmet team personnel that he was operating the bulldozer sub-cultivating the property for the landowner in preparation for replanting of trees. He stated that he had not notified 811 arkansas one call prior to starting his work. Arkansas one call personnel confirmed that no request to locate underground utilities was received when they searched their records for the haretown road area in clark county. Because the local temperature was in the high 30s and expected to drop during the night into the 20s, a plan was developed to temporarily stop the leak and make permanent repairs during the next day. Additional personnel were called out to monitor line pressures at the am-153 take-off from line s near gurdon and the end of am-153 near delight. Equipment and a temporary repair sleeve were brought from the emmet office. An emergency excavation notice was given to arkansas one call about the impending excavation near the line am-153 leak, ticket # ar14114-0908. The installation of the style 96 bolt-on repair sleeve over the leaking pipe was started. At 00:15 on saturday 11/15/2014, emmet team personnel completed the installation and notified system control that the leak was stopped. The line pressure at delight was observed to be approximately 1 psig. System control provided local, state and federal agencies with updated status reports about the am-153 leak. During the installation of the temporary leak repair, local distribution company experienced the loss of natural gas service to 5 or 6 homes. Distribution personnel closed off the delight distribution system at the town border station due to a concern about the possibility of pilot lights extinguishing and of escaping gas. Natural gas distribution service was stopped to approximately 200 customers. After sunrise on 11/15/2014, a contractor was mobilized. Repair materials including pre-tested pipe, fittings and stopples were brought to the leak site. System control was notified of the repair work that would occur. Excavation for the repair installation began at 09:49. Two stopples and a by-pass pipe were installed to replace the damage section of pipe. Welds were checked. The new piping was successfully leak tested from 13:30 to 14:00. The stopples were tapped to allow gas to flow around the damaged section of pipe. The damaged section of pipe was removed and replaced with weld caps. At 19:18 on 11/15/2014, system control was notified that the permanent repairs were completed. During the installation of the permanent leak repair, the town border station at delight was reopened to provide natural gas to the delight distribution system. Sgo assembled approximately 20 technicians to relight pilots and restore natural gas service to customers in delight.
Detailed record list
Report Received Date
2014-12-05 00:00:00
Iyear
2014
Report Number
20140133
Supplemental Number
16717
Report Type
Supplemental Final
Operator Id
Name
Enable Gas Transmission, Llc
Operator Street Address
1111 Louisiana Street
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2014-11-14 17:17:00
Location Latitude
34.01297563
Location Longitude
-93.36972716
Nrc Rpt Num
1101082
Nrc Rpt Datetime
2014-11-14 18:42:00
Commodity Released Type
Natural Gas
Unintentional Release
2820
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
No
Shutdown Explain
Lowered & Monitored Pressure To Allow Installation Of A Temporary Repair Sleeve
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2014-11-14 18:14:00
On Site Datetime
2014-11-14 18:14:00
On Off Shore
Onshore
Onshore State Abbreviation
Ar
Onshore Postal Code
71962
Onshore City Name
Oklona
Onshore County Name
Clark
Designated Location
Milepost
Designated Name
695+18
Pipe Fac Name
Am-153
Segment Name
Am-153
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
30
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
4
Pipe Wall Thickness
0.188
Pipe Smys
30000
Pipe Specification
Api 5l Grade A
Pipe Seam Type
Longitudinal Erw - Unknown Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Installation Year
1958
Manufactured Year
1958
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
2.2
Puncture Circum
1.2
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
37
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
11280
Est Cost Intentional Release
0
Est Cost Prop Damage
48525
Est Cost Emergency
1000
Est Cost Other
9500
Est Cost Other Details
Restore Service To Lost Customers
Prpty
70305
Accident Psig
116
Mop Psig
175
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
1
Internal Inspection Ind
No
Diameter Change Ind
Yes
Operation Complications Ind
Yes
Low Op Pressure Ind
Yes
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf 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
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
No
Notify Cga Dirt
Yes
Pipeline Easement Row Ind
Yes
Excavator Type
Contractor
Excavator Equipment
Farm Equipment
Work Performed
Agriculture
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
No
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
J**** C****
Preparer Title
Dot Compliance Manager
Preparer Email
J**********@e**************.com
Preparer Telephone
3184293664
Preparer Fax
3184293997
Authorizer Name
J***** C*****
Authorizer Title
Manager Of Dot Compliance Programs
Authorizer Telephone
3184293606
Authorizer Email
J************@e**************.com
Narrative
Friday 11/14/2014 at 17:17, system control received a call from mr. Gary grady reporting that a natural gas line had been hit by a bulldozer and was blowing gas near okolona, arkansas. System control contacted emmet team personnel to investigate the call. Emmet team personnel contacted mr. Grady to determine the location and situation. Additional personnel were called out to assist with responding to the leak. At 18:14, emmet team personnel confirmed that line am-153 was leaking gas. The site of the leak was reported to be at gps coordinates -93.36972716 w, 34.01297563 n. The site of the leak was approximately 1.5 miles west along the pipeline from the okolona city limits in section 29 township 8s and range 22w of clark county. The leak was later determined to be at station 695+18 on line am-153. The pipeline was marked with carsonite markers and buried approximately 30 inches deep at the leak site. Additional signs were added once repair was made. Mr. Grady told emmet team personnel that he was operating the bulldozer sub-cultivating the property for the landowner in preparation for replanting of trees. He stated that he had not notified 811 arkansas one call prior to starting his work. Arkansas one call personnel confirmed that no request to locate underground utilities was received when they searched their records for the haretown road area in clark county. Because the local temperature was in the high 30s and expected to drop during the night into the 20s, a plan was developed to temporarily stop the leak and make permanent repairs during the next day. Additional personnel were called out to monitor line pressures at the am-153 take-off from line s near gurdon and the end of am-153 near delight. Equipment and a temporary repair sleeve were brought from the emmet office. An emergency excavation notice was given to arkansas one call about the impending excavation near the line am-153 leak, ticket # ar14114-0908. The installation of the style 96 bolt-on repair sleeve over the leaking pipe was started. At 00:15 on saturday 11/15/2014, emmet team personnel completed the installation and notified system control that the leak was stopped. The line pressure at delight was observed to be approximately 1 psig. System control provided local, state and federal agencies with updated status reports about the am-153 leak. During the installation of the temporary leak repair, local distribution company experienced the loss of natural gas service to 5 or 6 homes. Distribution personnel closed off the delight distribution system at the town border station due to a concern about the possibility of pilot lights extinguishing and of escaping gas. Natural gas distribution service was stopped to approximately 200 customers. After sunrise on 11/15/2014, a contractor was mobilized. Repair materials including pre-tested pipe, fittings and stopples were brought to the leak site. System control was notified of the repair work that would occur. Excavation for the repair installation began at 09:49. Two stopples and a by-pass pipe were installed to replace the damage section of pipe. Welds were checked. The new piping was successfully leak tested from 13:30 to 14:00. The stopples were tapped to allow gas to flow around the damaged section of pipe. The damaged section of pipe was removed and replaced with weld caps. At 19:18 on 11/15/2014, system control was notified that the permanent repairs were completed. During the installation of the permanent leak repair, the town border station at delight was reopened to provide natural gas to the delight distribution system. Sgo assembled approximately 20 technicians to relight pilots and restore natural gas service to customers in delight.
| Report Received Date | 2014-12-05 00:00:00 |
|---|---|
| Iyear | 2014 |
| Report Number | 20140133 |
| Supplemental Number | 16717 |
| Report Type | Supplemental Final |
| Operator Id | 602 PHMSA Enforcement |
| Name | Enable Gas Transmission, Llc |
| Operator Street Address | 1111 Louisiana Street |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2014-11-14 17:17:00 |
| Location Latitude | 34.01297563 Google Maps OpenStreetMap |
| Location Longitude | -93.36972716 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1101082 NRC Report How to search |
| Nrc Rpt Datetime | 2014-11-14 18:42:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 2820 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Lowered & Monitored Pressure To Allow Installation Of A Temporary Repair Sleeve |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2014-11-14 18:14:00 |
| On Site Datetime | 2014-11-14 18:14:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ar |
| Onshore Postal Code | 71962 |
| Onshore City Name | Oklona |
| Onshore County Name | Clark |
| Designated Location | Milepost |
| Designated Name | 695+18 |
| Pipe Fac Name | Am-153 |
| Segment Name | Am-153 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 30 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 4 |
| Pipe Wall Thickness | 0.188 |
| Pipe Smys | 30000 |
| Pipe Specification | Api 5l Grade A |
| Pipe Seam Type | Longitudinal Erw - Unknown Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1958 |
| Manufactured Year | 1958 |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Puncture Axial | 2.2 |
| Puncture Circum | 1.2 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 37 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 11280 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 48525 |
| Est Cost Emergency | 1000 |
| Est Cost Other | 9500 |
| Est Cost Other Details | Restore Service To Lost Customers |
| Prpty | 70305 |
| Accident Psig | 116 |
| Mop Psig | 175 |
| 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 | 1 |
| Internal Inspection Ind | No |
| Diameter Change Ind | Yes |
| Operation Complications Ind | Yes |
| Low Op Pressure Ind | Yes |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf 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 | 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 | No |
| Notify Cga Dirt | Yes |
| Pipeline Easement Row Ind | Yes |
| Excavator Type | Contractor |
| Excavator Equipment | Farm Equipment |
| Work Performed | Agriculture |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | No |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | J**** C**** |
| Preparer Title | Dot Compliance Manager |
| Preparer Email | J**********@e**************.com |
| Preparer Telephone | 3184293664 |
| Preparer Fax | 3184293997 |
| Authorizer Name | J***** C***** |
| Authorizer Title | Manager Of Dot Compliance Programs |
| Authorizer Telephone | 3184293606 |
| Authorizer Email | J************@e**************.com |
| Narrative | Friday 11/14/2014 at 17:17, system control received a call from mr. Gary grady reporting that a natural gas line had been hit by a bulldozer and was blowing gas near okolona, arkansas. System control contacted emmet team personnel to investigate the call. Emmet team personnel contacted mr. Grady to determine the location and situation. Additional personnel were called out to assist with responding to the leak. At 18:14, emmet team personnel confirmed that line am-153 was leaking gas. The site of the leak was reported to be at gps coordinates -93.36972716 w, 34.01297563 n. The site of the leak was approximately 1.5 miles west along the pipeline from the okolona city limits in section 29 township 8s and range 22w of clark county. The leak was later determined to be at station 695+18 on line am-153. The pipeline was marked with carsonite markers and buried approximately 30 inches deep at the leak site. Additional signs were added once repair was made. Mr. Grady told emmet team personnel that he was operating the bulldozer sub-cultivating the property for the landowner in preparation for replanting of trees. He stated that he had not notified 811 arkansas one call prior to starting his work. Arkansas one call personnel confirmed that no request to locate underground utilities was received when they searched their records for the haretown road area in clark county. Because the local temperature was in the high 30s and expected to drop during the night into the 20s, a plan was developed to temporarily stop the leak and make permanent repairs during the next day. Additional personnel were called out to monitor line pressures at the am-153 take-off from line s near gurdon and the end of am-153 near delight. Equipment and a temporary repair sleeve were brought from the emmet office. An emergency excavation notice was given to arkansas one call about the impending excavation near the line am-153 leak, ticket # ar14114-0908. The installation of the style 96 bolt-on repair sleeve over the leaking pipe was started. At 00:15 on saturday 11/15/2014, emmet team personnel completed the installation and notified system control that the leak was stopped. The line pressure at delight was observed to be approximately 1 psig. System control provided local, state and federal agencies with updated status reports about the am-153 leak. During the installation of the temporary leak repair, local distribution company experienced the loss of natural gas service to 5 or 6 homes. Distribution personnel closed off the delight distribution system at the town border station due to a concern about the possibility of pilot lights extinguishing and of escaping gas. Natural gas distribution service was stopped to approximately 200 customers. After sunrise on 11/15/2014, a contractor was mobilized. Repair materials including pre-tested pipe, fittings and stopples were brought to the leak site. System control was notified of the repair work that would occur. Excavation for the repair installation began at 09:49. Two stopples and a by-pass pipe were installed to replace the damage section of pipe. Welds were checked. The new piping was successfully leak tested from 13:30 to 14:00. The stopples were tapped to allow gas to flow around the damaged section of pipe. The damaged section of pipe was removed and replaced with weld caps. At 19:18 on 11/15/2014, system control was notified that the permanent repairs were completed. During the installation of the permanent leak repair, the town border station at delight was reopened to provide natural gas to the delight distribution system. Sgo assembled approximately 20 technicians to relight pilots and restore natural gas service to customers in delight. |
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