Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2023-11-20 — MD
Operator
Washington Gas Light Co
Cause
Other Outside Force Damage
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2023-11-20 00:00 UTC
Report number
Location
MD, MONTGOMERY COUNTY
Narrative
On october 12, 2023, at approximately 17:15 hours washington gas was notified of a possible leak at 11301 mapleview dr silver spring md. Washington gas dispatched crews to the location who arrived and performed an assessment of situation, which resulted in the identification of a leaking 4-inch steel main line. Washington surburban sanitary commission was working on a leaking water main in the area that eventually caused the gas main leak. The cause of the leak on the 4-inch gas main line was a leak that originated on a 30-inch water main line at a 100 psi which created an approximately 3-inch diameter hole at the bottom of the 4-inch gas main. The gas main was submerged in the excavation due to the water leak. On october 14 at approximately 1220 hours the gas was turned off utilizing valves, stopple fitting and squeeze off method.
Detailed record list
Report Received Date
2023-11-20 00:00:00
Iyear
2023.0
Report Number
20230069.0
Supplemental Number
38836.0
Report Type
Original Final
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
20024.0
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Street Address
11301 Mapleview Drive
Location City Name
Silver Spring
Location County Name
Montgomery County
Location State Abbreviation
MD
Location Postal Code
20902.0
Location Latitude
39.042714
Location Longitude
-77.068798
Flow Cont Key Crit Ind
Yes
Flow Cont Squeeze Off Ind
Yes
Flow Cont Stopple Fitng Ind
Yes
Nrc Rpt Num
1383374.0
Additional Nrc Report Numbers
1383517.0
Commodity Released Type
Natural Gas
Unintentional Release
5950.0
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
No
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Other
Incident Area Details
In A Water Flooded Excavation
Depth Of Cover
48.0
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Main
Installation Year
1978.0
Pipe Diameter
4.0
Pipe Specification
Unknown
Pipe Manufacturer
Unknown
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown Frequency Or Seamless
Release Type
Other
Release Type Details
Water Main Line At A 100-Psi Burst Creating A Hole At The Bottom Of The 4-Inch Gas Main.
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
0.0
Est Cost Emergency
10947.0
Est Cost Other
383.0
Est Cost Other Details
Administrative Costs
Gas Cost In Mcf
1.26
Est Cost Unintentional Release
7497.0
Est Cost Intentional Release
0.0
Prpty
18827.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
0.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
0.0
Num Business Building Affctd
0.0
Accident Psig
20.0
Normal Psig
20.0
Mop Psig
25.0
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1978-01-01 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
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
The 4-inch steel natural gas line was a two-way feed system and pressure did not drop below alarm set point.
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
Water Escaping From A Burst Water Main.
Preparer Name
A***** M G****
Preparer Title
Supervisor Dot Pipeline Safety
Preparer Email
A*****@w******.com
Preparer Telephone
5713187993
Local Contact Name
A** G****
Local Contact Email
A*****@w******.com
Local Contact Telephone
5713187993
Authorizer Name
S****** M******
Authorizer Title
Manager Dot Pipeline Safety
Authorizer Telephone
7037505558
Authorizer Email
S*******@w******.com
Narrative
On october 12, 2023, at approximately 17:15 hours washington gas was notified of a possible leak at 11301 mapleview dr silver spring md. Washington gas dispatched crews to the location who arrived and performed an assessment of situation, which resulted in the identification of a leaking 4-inch steel main line. Washington surburban sanitary commission was working on a leaking water main in the area that eventually caused the gas main leak. The cause of the leak on the 4-inch gas main line was a leak that originated on a 30-inch water main line at a 100 psi which created an approximately 3-inch diameter hole at the bottom of the 4-inch gas main. The gas main was submerged in the excavation due to the water leak. On october 14 at approximately 1220 hours the gas was turned off utilizing valves, stopple fitting and squeeze off method.
| Report Received Date | 2023-11-20 00:00:00 |
|---|---|
| Iyear | 2023.0 |
| Report Number | 20230069.0 |
| Supplemental Number | 38836.0 |
| Report Type | Original Final |
| 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 | 20024.0 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Street Address | 11301 Mapleview Drive |
| Location City Name | Silver Spring |
| Location County Name | Montgomery County |
| Location State Abbreviation | MD |
| Location Postal Code | 20902.0 |
| Location Latitude | 39.042714 Google Maps OpenStreetMap |
| Location Longitude | -77.068798 Google Maps OpenStreetMap |
| Flow Cont Key Crit Ind | Yes |
| Flow Cont Squeeze Off Ind | Yes |
| Flow Cont Stopple Fitng Ind | Yes |
| Nrc Rpt Num | 1383374.0 NRC Report How to search |
| Additional Nrc Report Numbers | 1383517.0 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 5950.0 |
| 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 | No |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Other |
| Incident Area Details | In A Water Flooded Excavation |
| Depth Of Cover | 48.0 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Main |
| Installation Year | 1978.0 |
| Pipe Diameter | 4.0 |
| Pipe Specification | Unknown |
| Pipe Manufacturer | Unknown |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown Frequency Or Seamless |
| Release Type | Other |
| Release Type Details | Water Main Line At A 100-Psi Burst Creating A Hole At The Bottom Of The 4-Inch Gas Main. |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 0.0 |
| Est Cost Emergency | 10947.0 |
| Est Cost Other | 383.0 |
| Est Cost Other Details | Administrative Costs |
| Gas Cost In Mcf | 1.26 |
| Est Cost Unintentional Release | 7497.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 18827.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 0.0 |
| Num Business Building Affctd | 0.0 |
| Accident Psig | 20.0 |
| Normal Psig | 20.0 |
| Mop Psig | 25.0 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1978-01-01 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 | 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 | The 4-inch steel natural gas line was a two-way feed system and pressure did not drop below alarm set point. |
| 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 | Water Escaping From A Burst Water Main. |
| Preparer Name | A***** M G**** |
| Preparer Title | Supervisor Dot Pipeline Safety |
| Preparer Email | A*****@w******.com |
| Preparer Telephone | 5713187993 |
| Local Contact Name | A** G**** |
| Local Contact Email | A*****@w******.com |
| Local Contact Telephone | 5713187993 |
| Authorizer Name | S****** M****** |
| Authorizer Title | Manager Dot Pipeline Safety |
| Authorizer Telephone | 7037505558 |
| Authorizer Email | S*******@w******.com |
| Narrative | On october 12, 2023, at approximately 17:15 hours washington gas was notified of a possible leak at 11301 mapleview dr silver spring md. Washington gas dispatched crews to the location who arrived and performed an assessment of situation, which resulted in the identification of a leaking 4-inch steel main line. Washington surburban sanitary commission was working on a leaking water main in the area that eventually caused the gas main leak. The cause of the leak on the 4-inch gas main line was a leak that originated on a 30-inch water main line at a 100 psi which created an approximately 3-inch diameter hole at the bottom of the 4-inch gas main. The gas main was submerged in the excavation due to the water leak. On october 14 at approximately 1220 hours the gas was turned off utilizing valves, stopple fitting and squeeze off method. |
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