Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2020-09-02 — NE
Operator
Black Hills Energy
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$190,000
Incident datetime
2020-09-02 11:30
Report number
Location
NE, LANCASTER
Narrative
Gas leak was called in to this location by customer smelling gas outside for 3 minutes on sept 2, 2020. Bhe technician responded performed outside leak investigation. Lz-30 and cgi instruments detected underground leak and was pinpointed under the concrete of o street. O street traffic was closed and concrete was removed to ventilate leak. Leak was on 16 inch steel main and later determined to be a pinhole corrosion leak. A 16 inch short stop needed to be ordered and contractor hired to install stop in order to do repair. Street remained closed to allow venting of pinhole leak until 9-12-2020 as date of repair. To repair leak, an existing short stop was used along with a newly installed shortstop to isolate the leak and cut out pipe section to replace. The corrosion department investigated this determined that the steel main was poorly coated 1931 vintage pipe and the point of corrosion was directly under poor coating. It had a corrosion rate of 2.8 mpy. Cp test points close to this location had sufficient cp protection historically, but were not sufficient in the bell hole of where the leak occurred. Bhe installed 6 anodes in the bell hole of the main at this location to raise cp protection to an acceptable level. Cp test points remain at an acceptable level of protection after repair. On 9-16-2020, it was determined that costs of equipment, contractors, and street repair exceeded the $50,000 level of reporting.
Detailed record list
Occurred At
2020-09-02 11:30:00
Year
2020
Report Received Date
2020-10-15 00:00:00
Iyear
2020.0
Report Number
20200097.0
Supplemental Number
34680.0
Report Type
Supplemental Final
Operator Id
15359
Name
Black Hills Energy
Operator Street Address
2287 College Road Po Box 2006
Operator City Name
Council Bluffs
Operator State Abbreviation
IA
Operator Postal Code
51502
Local Datetime
2020-09-02 10:34:00
Time Zone
Central
Daylight Savings Ind
No
Location Street Address
3401 O Street
Location City Name
Lincoln
Location County Name
Lancaster
Location State Abbreviation
NE
Location Postal Code
68510
Location Latitude
40.813258
Location Longitude
-96.671531
Flow Cont Stopple Fitng Ind
Yes
Nrc Rpt Datetime
2020-09-16 14:42:00
Nrc Rpt Num
1287516
Commodity Released Type
Natural Gas
Unintentional Release
2.0
Intentional Release
0.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2020-09-02 11:30:00
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Initial Responder Com Datetime
2020-09-02 10:45:00
On Site Datetime
2020-09-02 11:24:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
24.0
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Main
Installation Year
1931.0
Pipe Diameter
16.0
Pipe Specification
Unknown
Pipe Manufacturer
Unknown
Material Involved
Steel
Steel Seam Type
Other
Steel Seam Type Details
Unknown
Wt Steel
0.25
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 3 Location
Est Cost Oper Paid
60000.0
Est Cost Prop Damage
190000.0
Est Cost Emergency
50000.0
Est Cost Other
15000.0
Est Cost Other Details
Traffic Control, Ems
Gas Cost In Mcf
20.0
Est Cost Unintentional Release
40.0
Est Cost Intentional Release
0.0
Prpty
315040.0
Commercial Affected
1.0
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
2.0
Accident Psig
70.0
Normal Psig
70.0
Mop Psig
74.0
Mop Cfr Section
192.619(A)(4)
Maop Established Date
1994-02-23 00:00:00
Accident Pressure
Pressure Did Not Exceed Maop
Gas Odorized System Type
Injection Pump
Gas Odorized Level
0.1
Scada In Place Ind
No
Accident Identifier
Notification From Public
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Localized Pitting
Other Corrosion Ind
Yes
Corrosion Type Details
Poorly Coated 1931 Vintage Pipe With Bad Coating At Point Of Corrosion Failure.
Field Exam Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Shielding Evident
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Other Cp Survey Ind
Yes
Cp Annual Survey Year
2020
Other Cp Survey Year
2020
Other Cp Survey Details
Cp Surveys In Area Immediately After Incident Were Compliant
Prior Damage
Yes
Coating Type
Other
Coating Type Details
Field Applied Mop/hand Coaltar
Field Applied Ind
Yes
Cor Hydrotest Leak Survey Date
2018-08-08 00:00:00
Cor Hydrotest Conducted Ind
No
Preparer Name
T** D********
Preparer Title
Pipeline Safety Compliance Coordinator
Preparer Email
T************@b*************.com
Preparer Telephone
308 760 4592
Authorizer Name
T** D********
Authorizer Title
Pipeline Safety Compliance Coordinator
Authorizer Telephone
402 858 3602
Authorizer Email
T************@b*************.com
Narrative
Gas leak was called in to this location by customer smelling gas outside for 3 minutes on sept 2, 2020. Bhe technician responded performed outside leak investigation. Lz-30 and cgi instruments detected underground leak and was pinpointed under the concrete of o street. O street traffic was closed and concrete was removed to ventilate leak. Leak was on 16 inch steel main and later determined to be a pinhole corrosion leak. A 16 inch short stop needed to be ordered and contractor hired to install stop in order to do repair. Street remained closed to allow venting of pinhole leak until 9-12-2020 as date of repair. To repair leak, an existing short stop was used along with a newly installed shortstop to isolate the leak and cut out pipe section to replace. The corrosion department investigated this determined that the steel main was poorly coated 1931 vintage pipe and the point of corrosion was directly under poor coating. It had a corrosion rate of 2.8 mpy. Cp test points close to this location had sufficient cp protection historically, but were not sufficient in the bell hole of where the leak occurred. Bhe installed 6 anodes in the bell hole of the main at this location to raise cp protection to an acceptable level. Cp test points remain at an acceptable level of protection after repair. On 9-16-2020, it was determined that costs of equipment, contractors, and street repair exceeded the $50,000 level of reporting.
| Occurred At | 2020-09-02 11:30:00 |
|---|---|
| Year | 2020 |
| Report Received Date | 2020-10-15 00:00:00 |
| Iyear | 2020.0 |
| Report Number | 20200097.0 |
| Supplemental Number | 34680.0 |
| Report Type | Supplemental Final |
| Operator Id | 15359 PHMSA Enforcement |
| Name | Black Hills Energy |
| Operator Street Address | 2287 College Road Po Box 2006 |
| Operator City Name | Council Bluffs |
| Operator State Abbreviation | IA |
| Operator Postal Code | 51502 |
| Local Datetime | 2020-09-02 10:34:00 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Street Address | 3401 O Street |
| Location City Name | Lincoln |
| Location County Name | Lancaster |
| Location State Abbreviation | NE |
| Location Postal Code | 68510 |
| Location Latitude | 40.813258 Google Maps OpenStreetMap |
| Location Longitude | -96.671531 Google Maps OpenStreetMap |
| Flow Cont Stopple Fitng Ind | Yes |
| Nrc Rpt Datetime | 2020-09-16 14:42:00 |
| Nrc Rpt Num | 1287516 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 2.0 |
| Intentional Release | 0.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2020-09-02 11:30:00 |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Initial Responder Com Datetime | 2020-09-02 10:45:00 |
| On Site Datetime | 2020-09-02 11:24:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 24.0 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Main |
| Installation Year | 1931.0 |
| Pipe Diameter | 16.0 |
| Pipe Specification | Unknown |
| Pipe Manufacturer | Unknown |
| Material Involved | Steel |
| Steel Seam Type | Other |
| Steel Seam Type Details | Unknown |
| Wt Steel | 0.25 |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 60000.0 |
| Est Cost Prop Damage | 190000.0 |
| Est Cost Emergency | 50000.0 |
| Est Cost Other | 15000.0 |
| Est Cost Other Details | Traffic Control, Ems |
| Gas Cost In Mcf | 20.0 |
| Est Cost Unintentional Release | 40.0 |
| Est Cost Intentional Release | 0.0 |
| Prpty | 315040.0 |
| Commercial Affected | 1.0 |
| 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 | 2.0 |
| Accident Psig | 70.0 |
| Normal Psig | 70.0 |
| Mop Psig | 74.0 |
| Mop Cfr Section | 192.619(A)(4) View CFR 49 §192 |
| Maop Established Date | 1994-02-23 00:00:00 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Gas Odorized System Type | Injection Pump |
| Gas Odorized Level | 0.1 |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Public |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | Localized Pitting |
| Other Corrosion Ind | Yes |
| Corrosion Type Details | Poorly Coated 1931 Vintage Pipe With Bad Coating At Point Of Corrosion Failure. |
| Field Exam Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Shielding Evident | Yes |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Other Cp Survey Ind | Yes |
| Cp Annual Survey Year | 2020 |
| Other Cp Survey Year | 2020 |
| Other Cp Survey Details | Cp Surveys In Area Immediately After Incident Were Compliant |
| Prior Damage | Yes |
| Coating Type | Other |
| Coating Type Details | Field Applied Mop/hand Coaltar |
| Field Applied Ind | Yes |
| Cor Hydrotest Leak Survey Date | 2018-08-08 00:00:00 |
| Cor Hydrotest Conducted Ind | No |
| Preparer Name | T** D******** |
| Preparer Title | Pipeline Safety Compliance Coordinator |
| Preparer Email | T************@b*************.com |
| Preparer Telephone | 308 760 4592 |
| Authorizer Name | T** D******** |
| Authorizer Title | Pipeline Safety Compliance Coordinator |
| Authorizer Telephone | 402 858 3602 |
| Authorizer Email | T************@b*************.com |
| Narrative | Gas leak was called in to this location by customer smelling gas outside for 3 minutes on sept 2, 2020. Bhe technician responded performed outside leak investigation. Lz-30 and cgi instruments detected underground leak and was pinpointed under the concrete of o street. O street traffic was closed and concrete was removed to ventilate leak. Leak was on 16 inch steel main and later determined to be a pinhole corrosion leak. A 16 inch short stop needed to be ordered and contractor hired to install stop in order to do repair. Street remained closed to allow venting of pinhole leak until 9-12-2020 as date of repair. To repair leak, an existing short stop was used along with a newly installed shortstop to isolate the leak and cut out pipe section to replace. The corrosion department investigated this determined that the steel main was poorly coated 1931 vintage pipe and the point of corrosion was directly under poor coating. It had a corrosion rate of 2.8 mpy. Cp test points close to this location had sufficient cp protection historically, but were not sufficient in the bell hole of where the leak occurred. Bhe installed 6 anodes in the bell hole of the main at this location to raise cp protection to an acceptable level. Cp test points remain at an acceptable level of protection after repair. On 9-16-2020, it was determined that costs of equipment, contractors, and street repair exceeded the $50,000 level of reporting. |
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