Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2018-09-05 — WV
Operator
Dominion Energy Transmission, Inc.
Cause
Other Outside Force Damage
Commodity
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$20,000
Incident datetime
2018-09-05 12:55
Report number
Location
WV
Narrative
On 9/5/2018, a contractor working for deti was mowing the g-134 right-of-way with a brush hog mounted on the front of a skid steer. At 12:55 pm, the contractor felt the brush hog hit an object and a propane cloud began to form around the skid steer and brush hog. The contractor immediately pressed the skid steer engine shutoff switch, but the skid steer engine did not shutoff due to the propane cloud. The contractor then put the skid steer in reverse and backed out of the propane cloud until the skid steer engine did shutoff. The contractor contacted deti personnel at the hastings extraction plant and communicated the situation. At 12:57 pm, deti personnel started to isolate g-134. The cpm leak detection system had already closed the upstream valve on g-134. Deti personnel were mobilized to lower run gate to close the downstream valve on g-134. At 1:04 pm, deti personnel closed the downstream valve on g-134 at lower run gate. At 1:08 pm, g-134 was isolated. At 1:09 pm, emergency traffic lights were activated to restrict traffic on route 20 near the hastings extraction plant. Deti personnel started to monitor the lower explosive limit for propane in the area surrounding the leak with combustible gas indicators. At 1:33 pm, flaring of propane from g-134 started at lower run gate. At 4:15 pm, venting of propane to the relief valve header initiated at the hastings extraction plant. At 4:20 pm, deti personnel determined that it was safe to approach the site of the leak based on the monitoring of the lower explosive limit for propane. At 5:40 pm, deti personnel located and closed a 1" diameter valve on g-134 at the site of the leak. The 1" diameter valve was part of a tap on g-134 that consisted of a 16" long nipple and a second 1" diameter valve that was previously closed and plugged. The tap on g-134 was identified as the source of the leak and was partially exposed aboveground. The contractor working for deti had contacted the tap on g-134 with the brush hog which caused the 16" long nipple to break right at the top of the 1" diameter valve on g-134. Deti personnel also located a short piece of casing pipe that had been installed around the tap on g-134. At 5:48 pm, deti personnel determined that it was safe to turn off the emergency traffic lights and allow traffic on route 20 near the hastings extraction plant. At 9:55 pm, flaring of propane from g-134 was stopped at lower run gate. On 9/6/2018, deti personnel and contractors working for deti excavated the tap on g-134 and completed repairs. The repairs consisted of removing the two 1" diameter valves and the 16" long nipple, threading a plug into the remaining threadolet on g-134, backwelding the plug, and applying coating to the plug. Coating was also applied to g-134 on a short section of 4" diameter pipe for which coating had been removed to facilitate the repairs. G-134 was placed back into service on 9/6/2018 at 7:00 pm.
Detailed record list
Report Received Date
2018-10-04 00:00:00
Iyear
2018
Report Number
20180292
Supplemental Number
31047
Report Type
Supplemental Final
Operator Id
2714
Name
Dominion Energy Transmission, Inc.
Operator Street Address
925 White Oaks Boulevard
Operator City Name
Bridgeport
Operator State Abbreviation
WV
Operator Postal Code
26330
Local Datetime
2018-09-05 12:55:00
Location Latitude
39.552849
Location Longitude
-80.675667
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Other Hvl
Commodity Details
Propane
Unintentional Release Bbls
10.95
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
Incident Identified Datetime
2018-09-05 12:55:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2018-09-05 13:08:00
Restart Datetime
2018-09-06 19:00:00
On Site Datetime
2018-09-05 13:04:00
Nrc Rpt Datetime
2018-09-05 14:18:00
Nrc Rpt Num
1223691
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Automatic
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Hastings Liquid Pipelines
Segment Name
G-134
Onshore State Abbreviation
Wv
Onshore Postal Code
26419
Onshore City Name
Pine Grove
Onshore County Name
Wetzel
Designated Location
Survey Station No.
Designated Name
6+73
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
Unknown
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Other
Item Involved Details
Tap
Installation Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Connection Failure
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
Yes
Commercially Nav Ind
Yes
Commercially Nav Yes No
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Usa Drinking Ind
Yes
Usa Drinking Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
1000
Est Cost Prop Damage
20000
Est Cost Emergency
1000
Est Cost Environmental
1000
Est Cost Other
0
Prpty
23000
Accident Psig
550
Mop Psig
720
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
7348
Internal Inspection Ind
No
Other Restrictions Ind
Yes
Other Inspection Ind
Yes
Internal Inspection Details
4" Diameter Pipe And Lack Of Smart Pig Launcher/receiver.
Operation Complications Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
Yes
Cpm Conf Ind
Yes
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Employee Drug Test Ind
No
Contractor Drug Test Ind
Yes
Num Contractors Tested
1
Num Contractors Failed
0
Cause
Other Outside Force Damage
Cause Details
Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation
Outside Force Type
Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation
Vehicle Subtype
Operator's Contractor
Preparer Name
D***** S****
Preparer Title
Pipeline Integrity Engineer
Preparer Email
D*************@d*************.com
Preparer Telephone
681-842-3365
Prepared Date
2018-10-10 00:00:00
Authorizer Name
J***** R***
Authorizer Telephone
681-842-3586
Authorizer Title
Manager Pipeline Integrity
Authorizer Email
J**********@d*************.com
Narrative
On 9/5/2018, a contractor working for deti was mowing the g-134 right-of-way with a brush hog mounted on the front of a skid steer. At 12:55 pm, the contractor felt the brush hog hit an object and a propane cloud began to form around the skid steer and brush hog. The contractor immediately pressed the skid steer engine shutoff switch, but the skid steer engine did not shutoff due to the propane cloud. The contractor then put the skid steer in reverse and backed out of the propane cloud until the skid steer engine did shutoff. The contractor contacted deti personnel at the hastings extraction plant and communicated the situation. At 12:57 pm, deti personnel started to isolate g-134. The cpm leak detection system had already closed the upstream valve on g-134. Deti personnel were mobilized to lower run gate to close the downstream valve on g-134. At 1:04 pm, deti personnel closed the downstream valve on g-134 at lower run gate. At 1:08 pm, g-134 was isolated. At 1:09 pm, emergency traffic lights were activated to restrict traffic on route 20 near the hastings extraction plant. Deti personnel started to monitor the lower explosive limit for propane in the area surrounding the leak with combustible gas indicators. At 1:33 pm, flaring of propane from g-134 started at lower run gate. At 4:15 pm, venting of propane to the relief valve header initiated at the hastings extraction plant. At 4:20 pm, deti personnel determined that it was safe to approach the site of the leak based on the monitoring of the lower explosive limit for propane. At 5:40 pm, deti personnel located and closed a 1" diameter valve on g-134 at the site of the leak. The 1" diameter valve was part of a tap on g-134 that consisted of a 16" long nipple and a second 1" diameter valve that was previously closed and plugged. The tap on g-134 was identified as the source of the leak and was partially exposed aboveground. The contractor working for deti had contacted the tap on g-134 with the brush hog which caused the 16" long nipple to break right at the top of the 1" diameter valve on g-134. Deti personnel also located a short piece of casing pipe that had been installed around the tap on g-134. At 5:48 pm, deti personnel determined that it was safe to turn off the emergency traffic lights and allow traffic on route 20 near the hastings extraction plant. At 9:55 pm, flaring of propane from g-134 was stopped at lower run gate. On 9/6/2018, deti personnel and contractors working for deti excavated the tap on g-134 and completed repairs. The repairs consisted of removing the two 1" diameter valves and the 16" long nipple, threading a plug into the remaining threadolet on g-134, backwelding the plug, and applying coating to the plug. Coating was also applied to g-134 on a short section of 4" diameter pipe for which coating had been removed to facilitate the repairs. G-134 was placed back into service on 9/6/2018 at 7:00 pm.
| Report Received Date | 2018-10-04 00:00:00 |
|---|---|
| Iyear | 2018 |
| Report Number | 20180292 |
| Supplemental Number | 31047 |
| Report Type | Supplemental Final |
| Operator Id | 2714 PHMSA Enforcement |
| Name | Dominion Energy Transmission, Inc. |
| Operator Street Address | 925 White Oaks Boulevard |
| Operator City Name | Bridgeport |
| Operator State Abbreviation | WV |
| Operator Postal Code | 26330 |
| Local Datetime | 2018-09-05 12:55:00 |
| Location Latitude | 39.552849 Google Maps OpenStreetMap |
| Location Longitude | -80.675667 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Other Hvl |
| Commodity Details | Propane |
| Unintentional Release Bbls | 10.95 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| Incident Identified Datetime | 2018-09-05 12:55:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2018-09-05 13:08:00 |
| Restart Datetime | 2018-09-06 19:00:00 |
| On Site Datetime | 2018-09-05 13:04:00 |
| Nrc Rpt Datetime | 2018-09-05 14:18:00 |
| Nrc Rpt Num | 1223691 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Automatic |
| Downstream Valve Type Ind | Manual |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Hastings Liquid Pipelines |
| Segment Name | G-134 |
| Onshore State Abbreviation | Wv |
| Onshore Postal Code | 26419 |
| Onshore City Name | Pine Grove |
| Onshore County Name | Wetzel |
| Designated Location | Survey Station No. |
| Designated Name | 6+73 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | Unknown |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Other |
| Item Involved Details | Tap |
| Installation Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| Commercially Nav Ind | Yes |
| Commercially Nav Yes No | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Usa Drinking Ind | Yes |
| Usa Drinking Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 1000 |
| Est Cost Prop Damage | 20000 |
| Est Cost Emergency | 1000 |
| Est Cost Environmental | 1000 |
| Est Cost Other | 0 |
| Prpty | 23000 |
| Accident Psig | 550 |
| Mop Psig | 720 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 7348 |
| Internal Inspection Ind | No |
| Other Restrictions Ind | Yes |
| Other Inspection Ind | Yes |
| Internal Inspection Details | 4" Diameter Pipe And Lack Of Smart Pig Launcher/receiver. |
| Operation Complications Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | Yes |
| Cpm Conf Ind | Yes |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | Yes |
| Num Contractors Tested | 1 |
| Num Contractors Failed | 0 |
| Cause | Other Outside Force Damage |
| Cause Details | Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation |
| Outside Force Type | Damage By Car, Truck, Or Other Motorized Vehicle/equipment Not Engaged In Excavation |
| Vehicle Subtype | Operator's Contractor |
| Preparer Name | D***** S**** |
| Preparer Title | Pipeline Integrity Engineer |
| Preparer Email | D*************@d*************.com |
| Preparer Telephone | 681-842-3365 |
| Prepared Date | 2018-10-10 00:00:00 |
| Authorizer Name | J***** R*** |
| Authorizer Telephone | 681-842-3586 |
| Authorizer Title | Manager Pipeline Integrity |
| Authorizer Email | J**********@d*************.com |
| Narrative | On 9/5/2018, a contractor working for deti was mowing the g-134 right-of-way with a brush hog mounted on the front of a skid steer. At 12:55 pm, the contractor felt the brush hog hit an object and a propane cloud began to form around the skid steer and brush hog. The contractor immediately pressed the skid steer engine shutoff switch, but the skid steer engine did not shutoff due to the propane cloud. The contractor then put the skid steer in reverse and backed out of the propane cloud until the skid steer engine did shutoff. The contractor contacted deti personnel at the hastings extraction plant and communicated the situation. At 12:57 pm, deti personnel started to isolate g-134. The cpm leak detection system had already closed the upstream valve on g-134. Deti personnel were mobilized to lower run gate to close the downstream valve on g-134. At 1:04 pm, deti personnel closed the downstream valve on g-134 at lower run gate. At 1:08 pm, g-134 was isolated. At 1:09 pm, emergency traffic lights were activated to restrict traffic on route 20 near the hastings extraction plant. Deti personnel started to monitor the lower explosive limit for propane in the area surrounding the leak with combustible gas indicators. At 1:33 pm, flaring of propane from g-134 started at lower run gate. At 4:15 pm, venting of propane to the relief valve header initiated at the hastings extraction plant. At 4:20 pm, deti personnel determined that it was safe to approach the site of the leak based on the monitoring of the lower explosive limit for propane. At 5:40 pm, deti personnel located and closed a 1" diameter valve on g-134 at the site of the leak. The 1" diameter valve was part of a tap on g-134 that consisted of a 16" long nipple and a second 1" diameter valve that was previously closed and plugged. The tap on g-134 was identified as the source of the leak and was partially exposed aboveground. The contractor working for deti had contacted the tap on g-134 with the brush hog which caused the 16" long nipple to break right at the top of the 1" diameter valve on g-134. Deti personnel also located a short piece of casing pipe that had been installed around the tap on g-134. At 5:48 pm, deti personnel determined that it was safe to turn off the emergency traffic lights and allow traffic on route 20 near the hastings extraction plant. At 9:55 pm, flaring of propane from g-134 was stopped at lower run gate. On 9/6/2018, deti personnel and contractors working for deti excavated the tap on g-134 and completed repairs. The repairs consisted of removing the two 1" diameter valves and the 16" long nipple, threading a plug into the remaining threadolet on g-134, backwelding the plug, and applying coating to the plug. Coating was also applied to g-134 on a short section of 4" diameter pipe for which coating had been removed to facilitate the repairs. G-134 was placed back into service on 9/6/2018 at 7:00 pm. |
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