Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2023-02-10 — ND
Operator
Montana - Dakota Utilities Co
Cause
Other Outside Force Damage
Commodity
Natural Gas
Program
GD
Damage and Injuries
1 fatality
1 injury
Property damage (nominal)
$270
Incident datetime
2023-02-10 00:00 UTC
Report number
Location
ND, MORTON
Narrative
On january 18, 2023, mdu responded to a structure fire/explosion at 4616 cortez circle in mandan, nd. An unintentional release and ignition of natural gas occurred. Mdu personnel secured the release by squeezing off the service line. On january 19, 2023, the mandan fire department and atf conducted an investigation at 4616 cortez circle in mandan, nd, with representatives from mdu and the nd psc present. During examination of the structure's interior, approximately ten (10) feet downstream of the gas meter, the non-jurisdictional gas piping was found to be separated at a connection point. A natural gas range and natural gas furnace were the only two fuel fired appliances located in the structure. The connections and piping to the range and furnace appeared to be intact. The heat source or cause of ignition was inconclusive. Following the investigation on january 19, 2023, mdu made attempts to coordinate the investigation of jurisdictional facilities with all parties. After failed attempts to coordinate, the company provided notification to all parties that an investigation would commence on august 15, 2023. Mdu and the north dakota gas pipeline safety program manager/inspector conducted an investigation of jurisdictional facilities at 4616 cortez circle in mandan, nd. A pressure test was performed on the service line. The pressure test passed, holding at system pressure. Above ground piping was intact up to the riser valve. There was a cracked nipple between the riser valve and the regulator. The analysis concludes that the nipple damage was due to an unknown outside force. It is unknown when the nipple damage occurred. Mdu was allowed to investigate jurisdictional facilities only. October 11, 2023 - corrected time in field a4. Updated from 12:26 to 11:57.
Detailed record list
Report Received Date
2023-02-10 00:00:00
Iyear
2023.0
Report Number
20230007.0
Supplemental Number
38650.0
Report Type
Supplemental Final
Operator Id
12684
Name
Montana - Dakota Utilities Co
Operator Street Address
400 North Fourth Street
Operator City Name
Bismarck
Operator State Abbreviation
ND
Operator Postal Code
58501.0
Time Zone
Central
Daylight Savings Ind
No
Location Street Address
4616 Cortez Circle
Location City Name
Mandan
Location County Name
Morton
Location State Abbreviation
ND
Location Postal Code
58554.0
Location Latitude
46.86667512
Location Longitude
-100.9446269
Flow Cont Squeeze Off Ind
Yes
Nrc Rpt Num
1357989.0
Additional Nrc Report Numbers
1358143.0
Commodity Released Type
Natural Gas
Unintentional Release
8.21
Intentional Release
0.0
Fatality Ind
Yes
Num Emp Fatalities
0
Num Contr Fatalities
0
Num Er Fatalities
0
Num Worker Fatalities
0
Num Gp Fatalities
1
Fatal
1
Injury Ind
Yes
Num Emp Injuries
0
Num Contr Injuries
0
Num Er Injuries
0
Num Worker Injuries
0
Num Gp Injuries
1
Injure
1
Ignite Ind
Yes
How Extinguished
Local/state/federal Emergency Responder
Gas Consumed By Fire In Mcf
8.21
Explode Ind
Yes
Num Pub Evacuated
2.0
Federal
No
Location Type
Private Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance (E.g. Value Or Regulator Station, Outdoor Meter Set)
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Outside Meter/regulator Set
Installation Year
2017.0
Customer Type
Single Family Residential
Was Efv Installed Before Ind
No
Curb Valve Inst Before Inc Ind
No
Material Involved
Steel
Steel Seam Type
Seamless
Wt Steel
0.113
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 3 Location
Est Cost Oper Paid
105000.0
Est Cost Prop Damage
270.0
Est Cost Emergency
1100.0
Est Cost Other
0.0
Gas Cost In Mcf
6.74
Est Cost Unintentional Release
55.0
Est Cost Intentional Release
0.0
Prpty
106425.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
1.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
2.0
Num Business Building Affctd
0.0
Accident Psig
30.0
Normal Psig
30.0
Mop Psig
60.0
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1983-09-30 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Odorized By Others
Gas Odorized Level
15
Scada In Place Ind
No
Accident Identifier
Notification From Emergency Responder
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
Other Outside Force Damage
Cause Details
Other Outside Force Damage
Outside Force Type
Other Outside Force Damage
Osf Other Details
There Was A Cracked Nipple Between The Riser Valve And The Regulator. The Analysis Concludes That The Nipple Damage Was Due To An Unknown Outside Force. It Is Unknown When The Nipple Damage Occurred.
Preparer Name
S******* C*******
Preparer Title
Manager Policy And Procedure
Preparer Email
S****************@m**.com
Preparer Telephone
208-509-2140
Local Contact Name
S******* C*******
Local Contact Email
S****************@m**.com
Local Contact Telephone
208-509-2140
Authorizer Name
J*** S******
Authorizer Title
Director Policy And Procedure
Authorizer Telephone
701-222-7773
Authorizer Email
J***********@m**.com
Narrative
On january 18, 2023, mdu responded to a structure fire/explosion at 4616 cortez circle in mandan, nd. An unintentional release and ignition of natural gas occurred. Mdu personnel secured the release by squeezing off the service line. On january 19, 2023, the mandan fire department and atf conducted an investigation at 4616 cortez circle in mandan, nd, with representatives from mdu and the nd psc present. During examination of the structure's interior, approximately ten (10) feet downstream of the gas meter, the non-jurisdictional gas piping was found to be separated at a connection point. A natural gas range and natural gas furnace were the only two fuel fired appliances located in the structure. The connections and piping to the range and furnace appeared to be intact. The heat source or cause of ignition was inconclusive. Following the investigation on january 19, 2023, mdu made attempts to coordinate the investigation of jurisdictional facilities with all parties. After failed attempts to coordinate, the company provided notification to all parties that an investigation would commence on august 15, 2023. Mdu and the north dakota gas pipeline safety program manager/inspector conducted an investigation of jurisdictional facilities at 4616 cortez circle in mandan, nd. A pressure test was performed on the service line. The pressure test passed, holding at system pressure. Above ground piping was intact up to the riser valve. There was a cracked nipple between the riser valve and the regulator. The analysis concludes that the nipple damage was due to an unknown outside force. It is unknown when the nipple damage occurred. Mdu was allowed to investigate jurisdictional facilities only. October 11, 2023 - corrected time in field a4. Updated from 12:26 to 11:57.
| Report Received Date | 2023-02-10 00:00:00 |
|---|---|
| Iyear | 2023.0 |
| Report Number | 20230007.0 |
| Supplemental Number | 38650.0 |
| Report Type | Supplemental Final |
| Operator Id | 12684 PHMSA Enforcement |
| Name | Montana - Dakota Utilities Co |
| Operator Street Address | 400 North Fourth Street |
| Operator City Name | Bismarck |
| Operator State Abbreviation | ND |
| Operator Postal Code | 58501.0 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Street Address | 4616 Cortez Circle |
| Location City Name | Mandan |
| Location County Name | Morton |
| Location State Abbreviation | ND |
| Location Postal Code | 58554.0 |
| Location Latitude | 46.86667512 Google Maps OpenStreetMap |
| Location Longitude | -100.9446269 Google Maps OpenStreetMap |
| Flow Cont Squeeze Off Ind | Yes |
| Nrc Rpt Num | 1357989.0 NRC Report How to search |
| Additional Nrc Report Numbers | 1358143.0 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 8.21 |
| Intentional Release | 0.0 |
| Fatality Ind | Yes |
| Num Emp Fatalities | 0 |
| Num Contr Fatalities | 0 |
| Num Er Fatalities | 0 |
| Num Worker Fatalities | 0 |
| Num Gp Fatalities | 1 |
| Fatal | 1 |
| Injury Ind | Yes |
| Num Emp Injuries | 0 |
| Num Contr Injuries | 0 |
| Num Er Injuries | 0 |
| Num Worker Injuries | 0 |
| Num Gp Injuries | 1 |
| Injure | 1 |
| Ignite Ind | Yes |
| How Extinguished | Local/state/federal Emergency Responder |
| Gas Consumed By Fire In Mcf | 8.21 |
| Explode Ind | Yes |
| Num Pub Evacuated | 2.0 |
| Federal | No |
| Location Type | Private Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance (E.g. Value Or Regulator Station, Outdoor Meter Set) |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Outside Meter/regulator Set |
| Installation Year | 2017.0 |
| Customer Type | Single Family Residential |
| Was Efv Installed Before Ind | No |
| Curb Valve Inst Before Inc Ind | No |
| Material Involved | Steel |
| Steel Seam Type | Seamless |
| Wt Steel | 0.113 |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 105000.0 |
| Est Cost Prop Damage | 270.0 |
| Est Cost Emergency | 1100.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 6.74 |
| Est Cost Unintentional Release | 55.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 106425.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 1.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 2.0 |
| Num Business Building Affctd | 0.0 |
| Accident Psig | 30.0 |
| Normal Psig | 30.0 |
| Mop Psig | 60.0 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1983-09-30 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Odorized By Others |
| Gas Odorized Level | 15 |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Emergency Responder |
| 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 | Other Outside Force Damage |
| Cause Details | Other Outside Force Damage |
| Outside Force Type | Other Outside Force Damage |
| Osf Other Details | There Was A Cracked Nipple Between The Riser Valve And The Regulator. The Analysis Concludes That The Nipple Damage Was Due To An Unknown Outside Force. It Is Unknown When The Nipple Damage Occurred. |
| Preparer Name | S******* C******* |
| Preparer Title | Manager Policy And Procedure |
| Preparer Email | S****************@m**.com |
| Preparer Telephone | 208-509-2140 |
| Local Contact Name | S******* C******* |
| Local Contact Email | S****************@m**.com |
| Local Contact Telephone | 208-509-2140 |
| Authorizer Name | J*** S****** |
| Authorizer Title | Director Policy And Procedure |
| Authorizer Telephone | 701-222-7773 |
| Authorizer Email | J***********@m**.com |
| Narrative | On january 18, 2023, mdu responded to a structure fire/explosion at 4616 cortez circle in mandan, nd. An unintentional release and ignition of natural gas occurred. Mdu personnel secured the release by squeezing off the service line. On january 19, 2023, the mandan fire department and atf conducted an investigation at 4616 cortez circle in mandan, nd, with representatives from mdu and the nd psc present. During examination of the structure's interior, approximately ten (10) feet downstream of the gas meter, the non-jurisdictional gas piping was found to be separated at a connection point. A natural gas range and natural gas furnace were the only two fuel fired appliances located in the structure. The connections and piping to the range and furnace appeared to be intact. The heat source or cause of ignition was inconclusive. Following the investigation on january 19, 2023, mdu made attempts to coordinate the investigation of jurisdictional facilities with all parties. After failed attempts to coordinate, the company provided notification to all parties that an investigation would commence on august 15, 2023. Mdu and the north dakota gas pipeline safety program manager/inspector conducted an investigation of jurisdictional facilities at 4616 cortez circle in mandan, nd. A pressure test was performed on the service line. The pressure test passed, holding at system pressure. Above ground piping was intact up to the riser valve. There was a cracked nipple between the riser valve and the regulator. The analysis concludes that the nipple damage was due to an unknown outside force. It is unknown when the nipple damage occurred. Mdu was allowed to investigate jurisdictional facilities only. October 11, 2023 - corrected time in field a4. Updated from 12:26 to 11:57. |
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