Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2020-05-08 — MN
Operator
Northern States Power Co Of Minnesota
Cause
Locating Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$1,500,000
Incident datetime
2020-05-08 15:13
Report number
Location
MN, WASHINGTON
Narrative
On may 8, 2020, northern states power company, minnesota (nspm) was notified regarding a blowing gas situation. The investigation revealed that an abandoned six inch steel, coal tar coating pipeline was located. An existing 12 inch steel fbe coated high pressure distribution line was not located. Review of the bore profile determined the 12 inch main that was installed in 2018 was approximately 25 feet at the point of damage. Nspm attempted to excavate the main at the point of damaged and later determined due to depth, it was safer to not expose the main at the point of damage and install approximately 1100 feet of new 12 inch steel. Estimated gas loss was calculated from scada data at the time of the damage. Point of damage was not exposed so size of puncture is not known for part d: question 2.D review of existing damage prevention processes was conducted and found that the individual responsible for verifying the size and type of pipe that was exposed did not follow those processes.
Detailed record list
Occurred At
2020-05-08 15:13:00
Year
2020
Report Received Date
2020-06-11 00:00:00
Iyear
2020.0
Report Number
20200056.0
Supplemental Number
34317.0
Report Type
Supplemental Final
Operator Id
31636
Name
Northern States Power Co Of Minnesota
Operator Street Address
414 Nicollet Mall
Operator City Name
Minneapolis
Operator State Abbreviation
MN
Operator Postal Code
55402
Local Datetime
2020-05-11 17:00:00
Location Street Address
Valley Creek Drive And Tower Drive
Location City Name
Woodbury
Location County Name
Washington
Location State Abbreviation
MN
Location Postal Code
55125
Location Latitude
44.920019
Location Longitude
-92.944151
Nrc Rpt Datetime
2020-05-11 17:00:00
Nrc Rpt Num
1277068
Commodity Released Type
Natural Gas
Unintentional Release
1405.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2020-05-08 15:13:00
On Site Datetime
2020-05-08 15:25:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
300.0
Crossing
Yes
Road Crossing Ind
Yes
Road Type
Bored/drilled
Pipe Facility Type
Investor Owned
System Part Involved
Main
Installation Year
2018.0
Pipe Diameter
12.0
Pipe Specification
Api 5l
Pipe Manufacturer
Tenaris
Material Involved
Steel
Steel Seam Type
Longitudinal Erw - High Frequency
Steel Seam Type Details
High Frequency Weld
Wt Steel
0.375
Release Type
Mechanical Puncture
Puncture Axial
1.0
Puncture Circum
1.0
Class Location Type
Class 3 Location
Est Cost Oper Paid
50000.0
Est Cost Prop Damage
1500000.0
Est Cost Emergency
3737.0
Est Cost Other
0.0
Est Cost Unintentional Release
3204.0
Prpty
1556941.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
0.0
Accident Psig
196.0
Normal Psig
200.0
Mop Psig
220.0
Accident Pressure
Pressure Did Not Exceed Maop
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 Emergency Responder
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
Release was caused by 3rd party excavator
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
Excavator Ind
Yes
Notify Cga Dirt
No
Public Row Ind
Yes
Public Subtype
County Road
Excavator Type
Contractor
Excavator Equipment
Directional Drilling
Work Performed
Water
One Call Notified Ind
Yes
One Call Ticket Num
201135196
Locator Type
Contract Locator
Visible Marks
No
Service Interruption
No
Root Cause Category
Locating Issue
Root Cause Type
Facility Not Marked Due To Unlocatable Facility
Preparer Name
L*** K*******
Preparer Title
Principal Consultant Gas Standards
Preparer Email
E*******************@x*********.com
Preparer Telephone
651-229-2282
Authorizer Name
C********** A****
Authorizer Title
Manager Gas Standards
Authorizer Telephone
303-571-3298
Authorizer Email
C******************@x*********.com
Narrative
On may 8, 2020, northern states power company, minnesota (nspm) was notified regarding a blowing gas situation. The investigation revealed that an abandoned six inch steel, coal tar coating pipeline was located. An existing 12 inch steel fbe coated high pressure distribution line was not located. Review of the bore profile determined the 12 inch main that was installed in 2018 was approximately 25 feet at the point of damage. Nspm attempted to excavate the main at the point of damaged and later determined due to depth, it was safer to not expose the main at the point of damage and install approximately 1100 feet of new 12 inch steel. Estimated gas loss was calculated from scada data at the time of the damage. Point of damage was not exposed so size of puncture is not known for part d: question 2.D review of existing damage prevention processes was conducted and found that the individual responsible for verifying the size and type of pipe that was exposed did not follow those processes.
| Occurred At | 2020-05-08 15:13:00 |
|---|---|
| Year | 2020 |
| Report Received Date | 2020-06-11 00:00:00 |
| Iyear | 2020.0 |
| Report Number | 20200056.0 |
| Supplemental Number | 34317.0 |
| Report Type | Supplemental Final |
| Operator Id | 31636 PHMSA Enforcement |
| Name | Northern States Power Co Of Minnesota |
| Operator Street Address | 414 Nicollet Mall |
| Operator City Name | Minneapolis |
| Operator State Abbreviation | MN |
| Operator Postal Code | 55402 |
| Local Datetime | 2020-05-11 17:00:00 |
| Location Street Address | Valley Creek Drive And Tower Drive |
| Location City Name | Woodbury |
| Location County Name | Washington |
| Location State Abbreviation | MN |
| Location Postal Code | 55125 |
| Location Latitude | 44.920019 Google Maps OpenStreetMap |
| Location Longitude | -92.944151 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2020-05-11 17:00:00 |
| Nrc Rpt Num | 1277068 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1405.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2020-05-08 15:13:00 |
| On Site Datetime | 2020-05-08 15:25:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 300.0 |
| Crossing | Yes |
| Road Crossing Ind | Yes |
| Road Type | Bored/drilled |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Installation Year | 2018.0 |
| Pipe Diameter | 12.0 |
| Pipe Specification | Api 5l |
| Pipe Manufacturer | Tenaris |
| Material Involved | Steel |
| Steel Seam Type | Longitudinal Erw - High Frequency |
| Steel Seam Type Details | High Frequency Weld |
| Wt Steel | 0.375 |
| Release Type | Mechanical Puncture |
| Puncture Axial | 1.0 |
| Puncture Circum | 1.0 |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 50000.0 |
| Est Cost Prop Damage | 1500000.0 |
| Est Cost Emergency | 3737.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 3204.0 |
| Prpty | 1556941.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Accident Psig | 196.0 |
| Normal Psig | 200.0 |
| Mop Psig | 220.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| 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 Emergency Responder |
| 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 | Release was caused by 3rd party excavator |
| 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 |
| Excavator Ind | Yes |
| Notify Cga Dirt | No |
| Public Row Ind | Yes |
| Public Subtype | County Road |
| Excavator Type | Contractor |
| Excavator Equipment | Directional Drilling |
| Work Performed | Water |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 201135196 |
| Locator Type | Contract Locator |
| Visible Marks | No |
| Service Interruption | No |
| Root Cause Category | Locating Issue |
| Root Cause Type | Facility Not Marked Due To Unlocatable Facility |
| Preparer Name | L*** K******* |
| Preparer Title | Principal Consultant Gas Standards |
| Preparer Email | E*******************@x*********.com |
| Preparer Telephone | 651-229-2282 |
| Authorizer Name | C********** A**** |
| Authorizer Title | Manager Gas Standards |
| Authorizer Telephone | 303-571-3298 |
| Authorizer Email | C******************@x*********.com |
| Narrative | On may 8, 2020, northern states power company, minnesota (nspm) was notified regarding a blowing gas situation. The investigation revealed that an abandoned six inch steel, coal tar coating pipeline was located. An existing 12 inch steel fbe coated high pressure distribution line was not located. Review of the bore profile determined the 12 inch main that was installed in 2018 was approximately 25 feet at the point of damage. Nspm attempted to excavate the main at the point of damaged and later determined due to depth, it was safer to not expose the main at the point of damage and install approximately 1100 feet of new 12 inch steel. Estimated gas loss was calculated from scada data at the time of the damage. Point of damage was not exposed so size of puncture is not known for part d: question 2.D review of existing damage prevention processes was conducted and found that the individual responsible for verifying the size and type of pipe that was exposed did not follow those processes. |
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