Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2011-07-11 — MD
Operator
Washington Gas Light Co
Cause
Excavation Issue
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$64,000
Incident datetime
2011-07-11 15:54
Report number
Location
MD, MONTGOMERY
Narrative
On monday, july 11, 2011, a washington gas contractor, utility line services, inc. (uls), damaged an eight-inch, wrapped-steel, high-pressure main located on stringtown road between gateway center drive and I-270 in clarksburg, maryland. Uls had several locate tickets for the area. These ticket numbers were 11334752, 11348536, and 11353091. Uls had been working in the area for several months relocating a section of main and were excavating to abandon a portion of main when the damage occurred. Uls had the lines in question exposed via vacuum excavation on june 23, 2011, and later backfilled the excavation. The depth of the damaged line was 20 feet. During the process of installing a slide rail shoring system on july 11, 2011, uls was using a trackhoe to drive down a corner post for this shoring system when the damage occurred. I-270 and stringtown road were closed for approximately 6 hours as a result of this damage. As of the time of this report, uls is still working to abandon the section of main. Once this section has been abandoned and gas is restored, a supplemental report will be filed.
Detailed record list
Occurred At
2011-07-11 15:54:00
Year
2011
Report Received Date
2011-08-10 00:00:00
Iyear
2011.0
Report Number
20110280.0
Supplemental Number
15299.0
Report Type
Original
Operator Id
22182
Name
Washington Gas Light Co
Operator Street Address
1000 Maine Avenue, Sw
Operator City Name
Washington
Operator State Abbreviation
DC
Operator Postal Code
20024
Local Datetime
2011-07-11 15:54:00
Location Street Address
Stringtown Road Between Gateway Center Drive & I-270
Location City Name
Clarksburg
Location County Name
Montgomery
Location State Abbreviation
MD
Location Postal Code
20871
Location Latitude
39.255215
Location Longitude
-77.274962
Nrc Rpt Datetime
2011-07-11 21:11:00
Nrc Rpt Num
982398
Commodity Released Type
Natural Gas
Unintentional Release
11339.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2011-07-11 15:54:00
On Site Datetime
2011-07-11 16:00:00
Federal
No
Location Type
Utility Right-Of-Way / Easement
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
240.0
Crossing
Yes
Road Crossing Ind
Yes
Road Type
Uncased
Pipe Facility Type
Privately Owned
System Part Involved
Main
Installation Year
2002.0
Pipe Diameter
8.0
Pipe Specification
Api5l
Pipe Manufacturer
Unknown
Material Involved
Steel
Steel Seam Type
Seamless
Steel Seam Type Details
Seamless
Wt Steel
0.322
Release Type
Mechanical Puncture
Puncture Axial
2.0
Puncture Circum
6.0
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
64000.0
Est Cost Emergency
23500.0
Est Cost Other
0.0
Est Cost Unintentional Release
53220.0
Prpty
140720.0
Commercial Affected
9.0
Industrial Affected
0.0
Residences Affected
1.0
Accident Psig
215.0
Normal Psig
215.0
Mop Psig
400.0
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
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
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
Excavation damage
Employee Drug Test Ind
No
Contractor Drug Test Ind
Yes
Num Contractors Tested
2
Num Contractors Failed
0
Cause
Excavation Damage
Cause Details
Excavation Damage By Operator's Contractor (Second Party)
Ex Party Type
Excavation Damage By Operator's Contractor (Second Party)
Notify Cga Dirt
No
Public Row Ind
Yes
Public Subtype
State Highway
Excavator Type
Contractor
Excavator Equipment
Unknown/other
Work Performed
Natural Gas
One Call Notified Ind
Yes
One Call Ticket Num
11334752
One Call Center Name
Miss Utility Of Maryland
Locator Type
Contract Locator
Visible Marks
Yes
Service Interruption
Yes
Root Cause Category
Excavation Issue
Root Cause Type
Improper Backfilling Practices
Preparer Name
T* M****** U*****
Preparer Title
Supervisor - Dot Pipeline Safety Compliance
Preparer Email
M******@w******.com
Preparer Telephone
703-750-4479
Preparer Fax
703-750-5591
Authorizer Name
D**** W* S*******
Authorizer Title
Manager - Dot Pipeline Safety Compliance
Authorizer Telephone
703-750-4341
Authorizer Email
D********@w******.com
Narrative
On monday, july 11, 2011, a washington gas contractor, utility line services, inc. (uls), damaged an eight-inch, wrapped-steel, high-pressure main located on stringtown road between gateway center drive and I-270 in clarksburg, maryland. Uls had several locate tickets for the area. These ticket numbers were 11334752, 11348536, and 11353091. Uls had been working in the area for several months relocating a section of main and were excavating to abandon a portion of main when the damage occurred. Uls had the lines in question exposed via vacuum excavation on june 23, 2011, and later backfilled the excavation. The depth of the damaged line was 20 feet. During the process of installing a slide rail shoring system on july 11, 2011, uls was using a trackhoe to drive down a corner post for this shoring system when the damage occurred. I-270 and stringtown road were closed for approximately 6 hours as a result of this damage. As of the time of this report, uls is still working to abandon the section of main. Once this section has been abandoned and gas is restored, a supplemental report will be filed.
| Occurred At | 2011-07-11 15:54:00 |
|---|---|
| Year | 2011 |
| Report Received Date | 2011-08-10 00:00:00 |
| Iyear | 2011.0 |
| Report Number | 20110280.0 |
| Supplemental Number | 15299.0 |
| Report Type | Original |
| Operator Id | 22182 PHMSA Enforcement |
| Name | Washington Gas Light Co |
| Operator Street Address | 1000 Maine Avenue, Sw |
| Operator City Name | Washington |
| Operator State Abbreviation | DC |
| Operator Postal Code | 20024 |
| Local Datetime | 2011-07-11 15:54:00 |
| Location Street Address | Stringtown Road Between Gateway Center Drive & I-270 |
| Location City Name | Clarksburg |
| Location County Name | Montgomery |
| Location State Abbreviation | MD |
| Location Postal Code | 20871 |
| Location Latitude | 39.255215 Google Maps OpenStreetMap |
| Location Longitude | -77.274962 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2011-07-11 21:11:00 |
| Nrc Rpt Num | 982398 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 11339.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2011-07-11 15:54:00 |
| On Site Datetime | 2011-07-11 16:00:00 |
| Federal | No |
| Location Type | Utility Right-Of-Way / Easement |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 240.0 |
| Crossing | Yes |
| Road Crossing Ind | Yes |
| Road Type | Uncased |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Main |
| Installation Year | 2002.0 |
| Pipe Diameter | 8.0 |
| Pipe Specification | Api5l |
| Pipe Manufacturer | Unknown |
| Material Involved | Steel |
| Steel Seam Type | Seamless |
| Steel Seam Type Details | Seamless |
| Wt Steel | 0.322 |
| Release Type | Mechanical Puncture |
| Puncture Axial | 2.0 |
| Puncture Circum | 6.0 |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 64000.0 |
| Est Cost Emergency | 23500.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 53220.0 |
| Prpty | 140720.0 |
| Commercial Affected | 9.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 1.0 |
| Accident Psig | 215.0 |
| Normal Psig | 215.0 |
| Mop Psig | 400.0 |
| 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 | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| 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 | Excavation damage |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | Yes |
| Num Contractors Tested | 2 |
| Num Contractors Failed | 0 |
| Cause | Excavation Damage |
| Cause Details | Excavation Damage By Operator's Contractor (Second Party) |
| Ex Party Type | Excavation Damage By Operator's Contractor (Second Party) |
| Notify Cga Dirt | No |
| Public Row Ind | Yes |
| Public Subtype | State Highway |
| Excavator Type | Contractor |
| Excavator Equipment | Unknown/other |
| Work Performed | Natural Gas |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 11334752 |
| One Call Center Name | Miss Utility Of Maryland |
| Locator Type | Contract Locator |
| Visible Marks | Yes |
| Service Interruption | Yes |
| Root Cause Category | Excavation Issue |
| Root Cause Type | Improper Backfilling Practices |
| Preparer Name | T* M****** U***** |
| Preparer Title | Supervisor - Dot Pipeline Safety Compliance |
| Preparer Email | M******@w******.com |
| Preparer Telephone | 703-750-4479 |
| Preparer Fax | 703-750-5591 |
| Authorizer Name | D**** W* S******* |
| Authorizer Title | Manager - Dot Pipeline Safety Compliance |
| Authorizer Telephone | 703-750-4341 |
| Authorizer Email | D********@w******.com |
| Narrative | On monday, july 11, 2011, a washington gas contractor, utility line services, inc. (uls), damaged an eight-inch, wrapped-steel, high-pressure main located on stringtown road between gateway center drive and I-270 in clarksburg, maryland. Uls had several locate tickets for the area. These ticket numbers were 11334752, 11348536, and 11353091. Uls had been working in the area for several months relocating a section of main and were excavating to abandon a portion of main when the damage occurred. Uls had the lines in question exposed via vacuum excavation on june 23, 2011, and later backfilled the excavation. The depth of the damaged line was 20 feet. During the process of installing a slide rail shoring system on july 11, 2011, uls was using a trackhoe to drive down a corner post for this shoring system when the damage occurred. I-270 and stringtown road were closed for approximately 6 hours as a result of this damage. As of the time of this report, uls is still working to abandon the section of main. Once this section has been abandoned and gas is restored, a supplemental report will be filed. |
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