Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2023-09-12 — NY
Operator
Niagara Mohawk Power Corp
Cause
Excavation Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$70,134
Incident datetime
2023-09-12 00:00 UTC
Report number
Location
NY, JEFFERSON
Narrative
Contractor struck and damaged national grid's 6-inch plastic distribution main, while trenching to install a new water main. This caused an unplanned interruption of over 230 customers in the area. The 6-inch main was properly marked out, and had intact tracer wire over it. The contractor did not follow proper hand excavating and did not keep markings visible as they progressed in excavating. The incident occurred on monday 8/14 at approx. 10:49 am, and national grid arrived at 10:57; however, we were not aware that this incident would potentially meet PHMSA reporting limits of $137k minimum threshold until tuesday 8/15 at 4:20 pm. Upon confirmation, the nrc was notified at 5:50 pm. As of september 9, all customers have been restored except for inactive/removed meters. Total inactive/removed meters is 8. Supplemental report filed 9/13/2023 to revise incident reporting time to 10:46 on 8/14/2023.
Detailed record list
Report Received Date
2023-09-12 00:00:00
Iyear
2023.0
Report Number
20230050.0
Supplemental Number
38536.0
Report Type
Supplemental Final
Operator Id
13480
Name
Niagara Mohawk Power Corp
Operator Street Address
300 Erie Boulevard West
Operator City Name
Syracuse
Operator State Abbreviation
NY
Operator Postal Code
13202.0
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Street Address
24244 State Route 37
Location City Name
Watertown
Location County Name
Jefferson
Location State Abbreviation
NY
Location Postal Code
13601.0
Location Latitude
44.0164555
Location Longitude
-75.9016211
Flow Cont Squeeze Off Ind
Yes
Nrc Rpt Num
1376286.0
Additional Nrc Report Numbers
1376491.0
Commodity Released Type
Natural Gas
Unintentional Release
223.0
Intentional Release
0.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Num Pub Evacuated
0.0
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
48.0
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Main
Installation Year
1987.0
Pipe Diameter
6.0
Pipe Specification
Astm D2513
Pipe Manufacturer
Phillips
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Plastic Sdr
11
Material Pe Pipe Code
3408
Release Type
Mechanical Puncture
Puncture Axial
24.0
Puncture Circum
4.0
Class Location Type
Class 2 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
70134.0
Est Cost Emergency
309939.0
Est Cost Other
0.0
Gas Cost In Mcf
3.48
Est Cost Unintentional Release
776.0
Est Cost Intentional Release
0.0
Prpty
380849.0
Commercial Affected
39.0
Industrial Affected
2.0
Residences Affected
214.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
214.0
Num Business Building Affctd
41.0
Accident Psig
40.0
Normal Psig
40.0
Mop Psig
45.0
Mop Cfr Section
192.621 M
Maop Established Date
1986-10-30 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Injection Pump
Gas Odorized Lvl Not Msrd Ind
Yes
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
Yes
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
No control room issues were the cause of or contributed to 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
State Law Exempt Ind
No
Notify Cga Dirt
No
Public Util Easement Row Ind
Yes
Excavator Type
Contractor
Excavator Equipment
Trencher
Work Performed
Water
One Call Notified Ind
Yes
One Call Ticket Num
8083001181.0
One Call Center Name
U-Dig
Locator Type
Contract Locator
Visible Marks
No
Service Interruption
Yes
Service Interruption Hours
18.0
Root Cause Category
Excavation Issue
Root Cause Type
Improper Excavation Practice Not Listed Above
Preparer Name
C****** B*****
Preparer Title
Prin Program Mgr Regulatory Moc
Preparer Email
C*************@n***********.com
Preparer Telephone
5169030596
Local Contact Name
C****** B*****
Local Contact Email
C*************@n***********.com
Local Contact Telephone
5169030596
Authorizer Name
C****** B*****
Authorizer Title
Prin Program Mgr Regulatory Moc
Authorizer Telephone
5169030596
Authorizer Email
C*************@n***********.com
Narrative
Contractor struck and damaged national grid's 6-inch plastic distribution main, while trenching to install a new water main. This caused an unplanned interruption of over 230 customers in the area. The 6-inch main was properly marked out, and had intact tracer wire over it. The contractor did not follow proper hand excavating and did not keep markings visible as they progressed in excavating. The incident occurred on monday 8/14 at approx. 10:49 am, and national grid arrived at 10:57; however, we were not aware that this incident would potentially meet PHMSA reporting limits of $137k minimum threshold until tuesday 8/15 at 4:20 pm. Upon confirmation, the nrc was notified at 5:50 pm. As of september 9, all customers have been restored except for inactive/removed meters. Total inactive/removed meters is 8. Supplemental report filed 9/13/2023 to revise incident reporting time to 10:46 on 8/14/2023.
| Report Received Date | 2023-09-12 00:00:00 |
|---|---|
| Iyear | 2023.0 |
| Report Number | 20230050.0 |
| Supplemental Number | 38536.0 |
| Report Type | Supplemental Final |
| Operator Id | 13480 PHMSA Enforcement |
| Name | Niagara Mohawk Power Corp |
| Operator Street Address | 300 Erie Boulevard West |
| Operator City Name | Syracuse |
| Operator State Abbreviation | NY |
| Operator Postal Code | 13202.0 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Street Address | 24244 State Route 37 |
| Location City Name | Watertown |
| Location County Name | Jefferson |
| Location State Abbreviation | NY |
| Location Postal Code | 13601.0 |
| Location Latitude | 44.0164555 Google Maps OpenStreetMap |
| Location Longitude | -75.9016211 Google Maps OpenStreetMap |
| Flow Cont Squeeze Off Ind | Yes |
| Nrc Rpt Num | 1376286.0 NRC Report How to search |
| Additional Nrc Report Numbers | 1376491.0 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 223.0 |
| Intentional Release | 0.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Num Pub Evacuated | 0.0 |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 48.0 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Installation Year | 1987.0 |
| Pipe Diameter | 6.0 |
| Pipe Specification | Astm D2513 |
| Pipe Manufacturer | Phillips |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Plastic Sdr | 11 |
| Material Pe Pipe Code | 3408 |
| Release Type | Mechanical Puncture |
| Puncture Axial | 24.0 |
| Puncture Circum | 4.0 |
| Class Location Type | Class 2 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 70134.0 |
| Est Cost Emergency | 309939.0 |
| Est Cost Other | 0.0 |
| Gas Cost In Mcf | 3.48 |
| Est Cost Unintentional Release | 776.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 380849.0 |
| Commercial Affected | 39.0 |
| Industrial Affected | 2.0 |
| Residences Affected | 214.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 214.0 |
| Num Business Building Affctd | 41.0 |
| Accident Psig | 40.0 |
| Normal Psig | 40.0 |
| Mop Psig | 45.0 |
| Mop Cfr Section | 192.621 M View CFR 49 §192 |
| Maop Established Date | 1986-10-30 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Injection Pump |
| Gas Odorized Lvl Not Msrd Ind | Yes |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | Yes |
| 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 | No control room issues were the cause of or contributed to 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 |
| State Law Exempt Ind | No |
| Notify Cga Dirt | No |
| Public Util Easement Row Ind | Yes |
| Excavator Type | Contractor |
| Excavator Equipment | Trencher |
| Work Performed | Water |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 8083001181.0 |
| One Call Center Name | U-Dig |
| Locator Type | Contract Locator |
| Visible Marks | No |
| Service Interruption | Yes |
| Service Interruption Hours | 18.0 |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Improper Excavation Practice Not Listed Above |
| Preparer Name | C****** B***** |
| Preparer Title | Prin Program Mgr Regulatory Moc |
| Preparer Email | C*************@n***********.com |
| Preparer Telephone | 5169030596 |
| Local Contact Name | C****** B***** |
| Local Contact Email | C*************@n***********.com |
| Local Contact Telephone | 5169030596 |
| Authorizer Name | C****** B***** |
| Authorizer Title | Prin Program Mgr Regulatory Moc |
| Authorizer Telephone | 5169030596 |
| Authorizer Email | C*************@n***********.com |
| Narrative | Contractor struck and damaged national grid's 6-inch plastic distribution main, while trenching to install a new water main. This caused an unplanned interruption of over 230 customers in the area. The 6-inch main was properly marked out, and had intact tracer wire over it. The contractor did not follow proper hand excavating and did not keep markings visible as they progressed in excavating. The incident occurred on monday 8/14 at approx. 10:49 am, and national grid arrived at 10:57; however, we were not aware that this incident would potentially meet PHMSA reporting limits of $137k minimum threshold until tuesday 8/15 at 4:20 pm. Upon confirmation, the nrc was notified at 5:50 pm. As of september 9, all customers have been restored except for inactive/removed meters. Total inactive/removed meters is 8. Supplemental report filed 9/13/2023 to revise incident reporting time to 10:46 on 8/14/2023. |
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