Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2023-12-19 — MD
Operator
Baltimore Gas And Electric Company
Cause
Incorrect Operation
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2023-12-19 00:00 UTC
Report number
Location
MD, BALTIMORE
Narrative
At approximately 11:00 am on 11/20/2023, during a routine inspection of a district regulator station located at 1410 coventry-meadows drive in sykesville, md, an abnormal operating condition of over pressurization was discovered on the gas system. During the inspection of the regulator, a control line valve didn't close properly due to a broken operating handle. This allowed higher pressure gas (250psig) to flow into a main with an maop of 99psig. The crew recognized the problem, and their initial reactions of closing/readjusting the station bypass throttle valve and relieving the pressure from the regulator station likely caused the ohp pressure to enter the downstream side of the main through the bypass and over pressurize the main. The event lasted less than 15min before the crew was able to stabilize pressure in the main. A leak survey of the impacted area was performed, and crews checked all houses in the area to verify pressure and turn services off for safety. 15 services were impacted in total, and all were turned on later that day after inspections were performed.
Detailed record list
Report Received Date
2023-12-19 00:00:00
Iyear
2023.0
Report Number
20230079.0
Supplemental Number
39672.0
Report Type
Supplemental
Operator Id
1088
Name
Baltimore Gas And Electric Company
Operator Street Address
110 W Fayette St
Operator City Name
Baltimore
Operator State Abbreviation
MD
Operator Postal Code
21201.0
Time Zone
Eastern
Daylight Savings Ind
No
Location Street Address
1410 Coventry Meadows Dr.
Location City Name
Sykesville
Location County Name
Baltimore
Location State Abbreviation
MD
Location Postal Code
21784.0
Location Latitude
39.33197
Location Longitude
-76.491953
Flow Cont Key Crit Ind
Yes
Nrc Rpt Num
1384778.0
Additional Nrc Report Numbers
1384902.0
Commodity Released Type
Natural Gas
Unintentional Release
0.0
Intentional Release
19.67
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
In Underground Enclosed Space (E.g. Vault)
Depth Of Cover
36.0
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
District Regulator/metering Station
Installation Year
1992.0
Manufactured Year
1992.0
Material Involved
Steel
Steel Seam Type
Longitudinal Erw - High Frequency
Wt Steel
0.154
Release Type
Other
Release Type Details
Intentional Release
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
0.0
Est Cost Emergency
0.0
Est Cost Other
0.0
Est Cost Other Details
Total Cost Under Investigation
Gas Cost In Mcf
2.29
Est Cost Unintentional Release
0.0
Est Cost Intentional Release
45.0
Prpty
45.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
15.0
Num Persons Hosp Not Ovnght
0.0
Num Injured Treated By Emt
0.0
Num Resident Building Affctd
15.0
Num Business Building Affctd
0.0
Accident Psig
259.0
Normal Psig
92.0
Mop Psig
99.0
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1992-01-01 00:00:00
Accident Pressure
Pressure Exceeded The Applicable Allowance In 192.201
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
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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
Issue occurred during maintenance operations, the condition was noted by the field technicians already on site.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Pipeline Or Equipment Overpressured
Operation Type
Pipeline Or Equipment Overpressured
Related Inadequate Proc Ind
Yes
Category Type
Routine Maintenance
Operator Qualification Ind
Yes
Qualified Individuals
Yes, They Were Qualified For The Task(S)
Eqf Control Releaf Ind
Yes
Preparer Name
J*** W***********
Preparer Title
Manager Gas Engineering And Standards
Preparer Email
J*******************@b**.com
Preparer Telephone
410-598-1601
Authorizer Name
R***** R**
Authorizer Title
Sr. Manager Gas Engineering And Asset Performance
Authorizer Telephone
302-593-3732
Authorizer Email
R*********@d*******.com
Narrative
At approximately 11:00 am on 11/20/2023, during a routine inspection of a district regulator station located at 1410 coventry-meadows drive in sykesville, md, an abnormal operating condition of over pressurization was discovered on the gas system. During the inspection of the regulator, a control line valve didn't close properly due to a broken operating handle. This allowed higher pressure gas (250psig) to flow into a main with an maop of 99psig. The crew recognized the problem, and their initial reactions of closing/readjusting the station bypass throttle valve and relieving the pressure from the regulator station likely caused the ohp pressure to enter the downstream side of the main through the bypass and over pressurize the main. The event lasted less than 15min before the crew was able to stabilize pressure in the main. A leak survey of the impacted area was performed, and crews checked all houses in the area to verify pressure and turn services off for safety. 15 services were impacted in total, and all were turned on later that day after inspections were performed.
| Report Received Date | 2023-12-19 00:00:00 |
|---|---|
| Iyear | 2023.0 |
| Report Number | 20230079.0 |
| Supplemental Number | 39672.0 |
| Report Type | Supplemental |
| Operator Id | 1088 PHMSA Enforcement |
| Name | Baltimore Gas And Electric Company |
| Operator Street Address | 110 W Fayette St |
| Operator City Name | Baltimore |
| Operator State Abbreviation | MD |
| Operator Postal Code | 21201.0 |
| Time Zone | Eastern |
| Daylight Savings Ind | No |
| Location Street Address | 1410 Coventry Meadows Dr. |
| Location City Name | Sykesville |
| Location County Name | Baltimore |
| Location State Abbreviation | MD |
| Location Postal Code | 21784.0 |
| Location Latitude | 39.33197 Google Maps OpenStreetMap |
| Location Longitude | -76.491953 Google Maps OpenStreetMap |
| Flow Cont Key Crit Ind | Yes |
| Nrc Rpt Num | 1384778.0 NRC Report How to search |
| Additional Nrc Report Numbers | 1384902.0 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 0.0 |
| Intentional Release | 19.67 |
| 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 | In Underground Enclosed Space (E.g. Vault) |
| Depth Of Cover | 36.0 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | District Regulator/metering Station |
| Installation Year | 1992.0 |
| Manufactured Year | 1992.0 |
| Material Involved | Steel |
| Steel Seam Type | Longitudinal Erw - High Frequency |
| Wt Steel | 0.154 |
| Release Type | Other |
| Release Type Details | Intentional Release |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 0.0 |
| Est Cost Emergency | 0.0 |
| Est Cost Other | 0.0 |
| Est Cost Other Details | Total Cost Under Investigation |
| Gas Cost In Mcf | 2.29 |
| Est Cost Unintentional Release | 0.0 |
| Est Cost Intentional Release | 45.0 |
| Prpty | 45.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 15.0 |
| Num Persons Hosp Not Ovnght | 0.0 |
| Num Injured Treated By Emt | 0.0 |
| Num Resident Building Affctd | 15.0 |
| Num Business Building Affctd | 0.0 |
| Accident Psig | 259.0 |
| Normal Psig | 92.0 |
| Mop Psig | 99.0 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1992-01-01 00:00:00 |
| Accident Pressure | Pressure Exceeded The Applicable Allowance In 192.201 |
| 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 | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| 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 | Issue occurred during maintenance operations, the condition was noted by the field technicians already on site. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Pipeline Or Equipment Overpressured |
| Operation Type | Pipeline Or Equipment Overpressured |
| Related Inadequate Proc Ind | Yes |
| Category Type | Routine Maintenance |
| Operator Qualification Ind | Yes |
| Qualified Individuals | Yes, They Were Qualified For The Task(S) |
| Eqf Control Releaf Ind | Yes |
| Preparer Name | J*** W*********** |
| Preparer Title | Manager Gas Engineering And Standards |
| Preparer Email | J*******************@b**.com |
| Preparer Telephone | 410-598-1601 |
| Authorizer Name | R***** R** |
| Authorizer Title | Sr. Manager Gas Engineering And Asset Performance |
| Authorizer Telephone | 302-593-3732 |
| Authorizer Email | R*********@d*******.com |
| Narrative | At approximately 11:00 am on 11/20/2023, during a routine inspection of a district regulator station located at 1410 coventry-meadows drive in sykesville, md, an abnormal operating condition of over pressurization was discovered on the gas system. During the inspection of the regulator, a control line valve didn't close properly due to a broken operating handle. This allowed higher pressure gas (250psig) to flow into a main with an maop of 99psig. The crew recognized the problem, and their initial reactions of closing/readjusting the station bypass throttle valve and relieving the pressure from the regulator station likely caused the ohp pressure to enter the downstream side of the main through the bypass and over pressurize the main. The event lasted less than 15min before the crew was able to stabilize pressure in the main. A leak survey of the impacted area was performed, and crews checked all houses in the area to verify pressure and turn services off for safety. 15 services were impacted in total, and all were turned on later that day after inspections were performed. |
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