Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2010-11-03 — MA
Operator
Nstar Gas Company
Cause
Notification Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2010-11-03 08:52
Report number
Location
MA, SUFFOLK
Narrative
On november 3, 2010, a third party contractor was installing new water mains in the public way in hyde park, massachusetts. While excavating in the public way, the contractor struck and pulled up a 1" ip steel gas service to 17 danny road, hyde park causing an unintentional release of natural gas into the home located at 17 danny road, hyde park and resulting explosion. The 1" ip steel gas service had been installed with the cover of 36 inches.The contractor had failed to request a mark-out of underground facilities in danny road as required by massachusetts dig safe laws and regulations. As a result of the explosion and as a precaution, emergency personnel at the scene evacuated several adjacent residences; the number of general public evacuated is not known.
Detailed record list
Occurred At
2010-11-03 08:52:00
Year
2010
Report Received Date
2010-12-22 00:00:00
Iyear
2010.0
Report Number
20100111.0
Supplemental Number
15850.0
Report Type
Supplemental
Operator Id
2652
Name
Nstar Gas Company
Operator Street Address
One Nstar Way
Operator City Name
Westwood
Operator State Abbreviation
MA
Operator Postal Code
02090
Local Datetime
2010-11-03 08:52:00
Location Street Address
17 Danny Road
Location City Name
Hyde Park
Location County Name
Suffolk
Location State Abbreviation
MA
Location Postal Code
02136
Location Latitude
42.24113
Location Longitude
-71.13693
Nrc Rpt Datetime
2010-11-03 15:37:00
Nrc Rpt Num
958866
Commodity Released Type
Natural Gas
Unintentional Release
4.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
Yes
Explode Ind
Yes
Incident Identified Datetime
2010-11-03 08:52:00
On Site Datetime
2010-11-03 09:10:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Exposed Due To Excavation
Depth Of Cover
36.0
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Service
Installation Year
1960.0
Pipe Diameter
1.0
Pipe Specification
Unknown
Pipe Manufacturer
Unknown
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown
Wt Steel
0.133
Release Type
Other
Release Type Details
Komatsu Pc240lc Backhoe Excavator Operated By A Third Party Contractor Pulled Gas Line Causing Break
Class Location Type
Class 3 Location
Est Cost Oper Paid
500000.0
Est Cost Prop Damage
0.0
Est Cost Emergency
0.0
Est Cost Other
0.0
Est Cost Other Details
Costs Originally Unknown. Estimate Of Property Damage Added 4/21/14.
Est Cost Unintentional Release
240.0
Prpty
500240.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
1.0
Accident Psig
22.0
Normal Psig
22.0
Mop Psig
25.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
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
Third party contractors damage to the gas service line did not cause sufficient reduction of pressure on the system to trigger any scada alarms.
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
No
Notify Cga Dirt
No
Public Row Ind
Yes
Public Subtype
City Street
Excavator Type
Contractor
Excavator Equipment
Backhoe/trackhoe
Work Performed
Water
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
Unknown/other
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
K**** K*****
Preparer Title
Manager - Gas Distribution
Preparer Email
K***********@n****.com
Preparer Telephone
(339) 987-8222
Preparer Fax
(617) 369-5496
Authorizer Name
W****** M*****
Authorizer Title
Director - Gas Distribution
Authorizer Telephone
(508) 305-6950
Authorizer Email
W*************@n****.com
Narrative
On november 3, 2010, a third party contractor was installing new water mains in the public way in hyde park, massachusetts. While excavating in the public way, the contractor struck and pulled up a 1" ip steel gas service to 17 danny road, hyde park causing an unintentional release of natural gas into the home located at 17 danny road, hyde park and resulting explosion. The 1" ip steel gas service had been installed with the cover of 36 inches.The contractor had failed to request a mark-out of underground facilities in danny road as required by massachusetts dig safe laws and regulations. As a result of the explosion and as a precaution, emergency personnel at the scene evacuated several adjacent residences; the number of general public evacuated is not known.
| Occurred At | 2010-11-03 08:52:00 |
|---|---|
| Year | 2010 |
| Report Received Date | 2010-12-22 00:00:00 |
| Iyear | 2010.0 |
| Report Number | 20100111.0 |
| Supplemental Number | 15850.0 |
| Report Type | Supplemental |
| Operator Id | 2652 PHMSA Enforcement |
| Name | Nstar Gas Company |
| Operator Street Address | One Nstar Way |
| Operator City Name | Westwood |
| Operator State Abbreviation | MA |
| Operator Postal Code | 02090 |
| Local Datetime | 2010-11-03 08:52:00 |
| Location Street Address | 17 Danny Road |
| Location City Name | Hyde Park |
| Location County Name | Suffolk |
| Location State Abbreviation | MA |
| Location Postal Code | 02136 |
| Location Latitude | 42.24113 Google Maps OpenStreetMap |
| Location Longitude | -71.13693 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2010-11-03 15:37:00 |
| Nrc Rpt Num | 958866 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | Yes |
| Explode Ind | Yes |
| Incident Identified Datetime | 2010-11-03 08:52:00 |
| On Site Datetime | 2010-11-03 09:10:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Exposed Due To Excavation |
| Depth Of Cover | 36.0 |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Service |
| Installation Year | 1960.0 |
| Pipe Diameter | 1.0 |
| Pipe Specification | Unknown |
| Pipe Manufacturer | Unknown |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown |
| Wt Steel | 0.133 |
| Release Type | Other |
| Release Type Details | Komatsu Pc240lc Backhoe Excavator Operated By A Third Party Contractor Pulled Gas Line Causing Break |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 500000.0 |
| Est Cost Prop Damage | 0.0 |
| Est Cost Emergency | 0.0 |
| Est Cost Other | 0.0 |
| Est Cost Other Details | Costs Originally Unknown. Estimate Of Property Damage Added 4/21/14. |
| Est Cost Unintentional Release | 240.0 |
| Prpty | 500240.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 1.0 |
| Accident Psig | 22.0 |
| Normal Psig | 22.0 |
| Mop Psig | 25.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| 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 | Third party contractors damage to the gas service line did not cause sufficient reduction of pressure on the system to trigger any scada alarms. |
| 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 | No |
| Notify Cga Dirt | No |
| Public Row Ind | Yes |
| Public Subtype | City Street |
| Excavator Type | Contractor |
| Excavator Equipment | Backhoe/trackhoe |
| Work Performed | Water |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | Unknown/other |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | K**** K***** |
| Preparer Title | Manager - Gas Distribution |
| Preparer Email | K***********@n****.com |
| Preparer Telephone | (339) 987-8222 |
| Preparer Fax | (617) 369-5496 |
| Authorizer Name | W****** M***** |
| Authorizer Title | Director - Gas Distribution |
| Authorizer Telephone | (508) 305-6950 |
| Authorizer Email | W*************@n****.com |
| Narrative | On november 3, 2010, a third party contractor was installing new water mains in the public way in hyde park, massachusetts. While excavating in the public way, the contractor struck and pulled up a 1" ip steel gas service to 17 danny road, hyde park causing an unintentional release of natural gas into the home located at 17 danny road, hyde park and resulting explosion. The 1" ip steel gas service had been installed with the cover of 36 inches.The contractor had failed to request a mark-out of underground facilities in danny road as required by massachusetts dig safe laws and regulations. As a result of the explosion and as a precaution, emergency personnel at the scene evacuated several adjacent residences; the number of general public evacuated is not known. |
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