Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2019-10-22 — WA
Operator
Cascade Natural Gas Corp
Cause
Locating Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2019-10-22 09:00
Report number
Location
WA, GRANT
Narrative
Original nrc# 1263446 48-hour follow-up nrc# 1263581 on 10/17/19 at 710 north stratford road, moses lake, wa, a third-party contractor used a mini excavator alongside a cngc field employee with a shovel in an attempt to locate a long stub service line that was unlocatable. They dug 5.5 feet deep, but were unable to locate the stub. On 10/18/19, two cngc field employees attempted to locate this stub service line with no success; they contacted a cngc corrosion control technician for assistance. On 10/21/19, the corrosion control technician attempted to locate the stub service line, again, with no success. Markings provided by cngc were based on measurements from field drawings. On 10/22/19, two cngc field employees were on-site (see first operator arrival) at 8:30am working with the third-party contractor. At 9:00am, the contractor was digging very slowly when he struck the unlocatable stub service line and pulled the 3/4" auto perf tee away from the 6" steel main creating a 3/8" hole. Once the blowing gas was under control and on bypass, cngc crew dug up to permanently repair the damage. System pressure was 40psig at the time of the incident and was lowered to 27psig at 2:50pm in order to mitigate gas loss. All affected service lines were shut off after normal business hours. Cng became aware the repair costs were nearing $50,000 on november 8, 2019 at which time cng contacted the national response center.
Detailed record list
Occurred At
2019-10-22 09:00:00
Year
2019
Report Received Date
2019-11-22 00:00:00
Iyear
2019.0
Report Number
20190134.0
Supplemental Number
32980.0
Report Type
Supplemental Final
Operator Id
2128
Name
Cascade Natural Gas Corp
Operator Street Address
8113 W. Grandridge Blvd
Operator City Name
Kennewick
Operator State Abbreviation
WA
Operator Postal Code
99336
Local Datetime
2019-10-22 09:00:00
Location Street Address
710 N Stratford Road
Location City Name
Moses Lake
Location County Name
Grant
Location State Abbreviation
WA
Location Postal Code
98837-1569
Location Latitude
47.13890119
Location Longitude
-119.2785201
Nrc Rpt Datetime
2019-11-08 12:11:00
Nrc Rpt Num
1263446
Commodity Released Type
Natural Gas
Unintentional Release
79.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
8.0
Incident Identified Datetime
2019-10-22 09:00:00
On Site Datetime
2019-10-22 08:30:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Exposed Due To Excavation
Depth Of Cover
42.0
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Main
Pipe Diameter
6.0
Pipe Specification
Unknown
Pipe Manufacturer
Unknown
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown
Wt Steel
0.75
Release Type
Other
Release Type Details
Service Tee Was Pulled Off 6" Main Leaving A 3/8" Hole. The Service Tee Was Installed In 1961.
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
0.0
Est Cost Emergency
30000.0
Est Cost Other
35279.0
Est Cost Other Details
Surface Restoration, Traffic Control, Light Towers, Bypass Equipment.
Est Cost Unintentional Release
356.0
Prpty
65635.0
Commercial Affected
3.0
Industrial Affected
0.0
Residences Affected
0.0
Accident Psig
40.0
Normal Psig
40.0
Mop Psig
47.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
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
No
Public Row Ind
Yes
Public Subtype
City Street
Excavator Type
Contractor
Excavator Equipment
Backhoe/trackhoe
Work Performed
Unknown/other
One Call Notified Ind
Yes
Locator Type
Utility Owner
Visible Marks
No
Service Interruption
Yes
Service Interruption Hours
18.0
Root Cause Category
Locating Issue
Root Cause Type
Facility Not Marked Due To Unlocatable Facility
Preparer Name
G*** W******
Preparer Title
Manager Policy And Procedure
Preparer Email
G***********@m**.com
Preparer Telephone
208-377-6032
Authorizer Name
G*** W******
Authorizer Title
Manager Policy And Procedure
Authorizer Telephone
208-377-6032
Authorizer Email
G***********@m**.com
Narrative
Original nrc# 1263446 48-hour follow-up nrc# 1263581 on 10/17/19 at 710 north stratford road, moses lake, wa, a third-party contractor used a mini excavator alongside a cngc field employee with a shovel in an attempt to locate a long stub service line that was unlocatable. They dug 5.5 feet deep, but were unable to locate the stub. On 10/18/19, two cngc field employees attempted to locate this stub service line with no success; they contacted a cngc corrosion control technician for assistance. On 10/21/19, the corrosion control technician attempted to locate the stub service line, again, with no success. Markings provided by cngc were based on measurements from field drawings. On 10/22/19, two cngc field employees were on-site (see first operator arrival) at 8:30am working with the third-party contractor. At 9:00am, the contractor was digging very slowly when he struck the unlocatable stub service line and pulled the 3/4" auto perf tee away from the 6" steel main creating a 3/8" hole. Once the blowing gas was under control and on bypass, cngc crew dug up to permanently repair the damage. System pressure was 40psig at the time of the incident and was lowered to 27psig at 2:50pm in order to mitigate gas loss. All affected service lines were shut off after normal business hours. Cng became aware the repair costs were nearing $50,000 on november 8, 2019 at which time cng contacted the national response center.
| Occurred At | 2019-10-22 09:00:00 |
|---|---|
| Year | 2019 |
| Report Received Date | 2019-11-22 00:00:00 |
| Iyear | 2019.0 |
| Report Number | 20190134.0 |
| Supplemental Number | 32980.0 |
| Report Type | Supplemental Final |
| Operator Id | 2128 PHMSA Enforcement |
| Name | Cascade Natural Gas Corp |
| Operator Street Address | 8113 W. Grandridge Blvd |
| Operator City Name | Kennewick |
| Operator State Abbreviation | WA |
| Operator Postal Code | 99336 |
| Local Datetime | 2019-10-22 09:00:00 |
| Location Street Address | 710 N Stratford Road |
| Location City Name | Moses Lake |
| Location County Name | Grant |
| Location State Abbreviation | WA |
| Location Postal Code | 98837-1569 |
| Location Latitude | 47.13890119 Google Maps OpenStreetMap |
| Location Longitude | -119.2785201 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2019-11-08 12:11:00 |
| Nrc Rpt Num | 1263446 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 79.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 8.0 |
| Incident Identified Datetime | 2019-10-22 09:00:00 |
| On Site Datetime | 2019-10-22 08:30:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Exposed Due To Excavation |
| Depth Of Cover | 42.0 |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Pipe Diameter | 6.0 |
| Pipe Specification | Unknown |
| Pipe Manufacturer | Unknown |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown |
| Wt Steel | 0.75 |
| Release Type | Other |
| Release Type Details | Service Tee Was Pulled Off 6" Main Leaving A 3/8" Hole. The Service Tee Was Installed In 1961. |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 0.0 |
| Est Cost Emergency | 30000.0 |
| Est Cost Other | 35279.0 |
| Est Cost Other Details | Surface Restoration, Traffic Control, Light Towers, Bypass Equipment. |
| Est Cost Unintentional Release | 356.0 |
| Prpty | 65635.0 |
| Commercial Affected | 3.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Accident Psig | 40.0 |
| Normal Psig | 40.0 |
| Mop Psig | 47.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| 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 | No |
| Public Row Ind | Yes |
| Public Subtype | City Street |
| Excavator Type | Contractor |
| Excavator Equipment | Backhoe/trackhoe |
| Work Performed | Unknown/other |
| One Call Notified Ind | Yes |
| Locator Type | Utility Owner |
| Visible Marks | No |
| Service Interruption | Yes |
| Service Interruption Hours | 18.0 |
| Root Cause Category | Locating Issue |
| Root Cause Type | Facility Not Marked Due To Unlocatable Facility |
| Preparer Name | G*** W****** |
| Preparer Title | Manager Policy And Procedure |
| Preparer Email | G***********@m**.com |
| Preparer Telephone | 208-377-6032 |
| Authorizer Name | G*** W****** |
| Authorizer Title | Manager Policy And Procedure |
| Authorizer Telephone | 208-377-6032 |
| Authorizer Email | G***********@m**.com |
| Narrative | Original nrc# 1263446 48-hour follow-up nrc# 1263581 on 10/17/19 at 710 north stratford road, moses lake, wa, a third-party contractor used a mini excavator alongside a cngc field employee with a shovel in an attempt to locate a long stub service line that was unlocatable. They dug 5.5 feet deep, but were unable to locate the stub. On 10/18/19, two cngc field employees attempted to locate this stub service line with no success; they contacted a cngc corrosion control technician for assistance. On 10/21/19, the corrosion control technician attempted to locate the stub service line, again, with no success. Markings provided by cngc were based on measurements from field drawings. On 10/22/19, two cngc field employees were on-site (see first operator arrival) at 8:30am working with the third-party contractor. At 9:00am, the contractor was digging very slowly when he struck the unlocatable stub service line and pulled the 3/4" auto perf tee away from the 6" steel main creating a 3/8" hole. Once the blowing gas was under control and on bypass, cngc crew dug up to permanently repair the damage. System pressure was 40psig at the time of the incident and was lowered to 27psig at 2:50pm in order to mitigate gas loss. All affected service lines were shut off after normal business hours. Cng became aware the repair costs were nearing $50,000 on november 8, 2019 at which time cng contacted the national response center. |
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