Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2015-10-24 — MI
Operator
Consumers Energy Co
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$10,921
Incident datetime
2015-10-24 11:55
Report number
Location
MI
Narrative
At approximately 11:55 on saturday, october 24, 2015 consumers energy gas control was notified by a landowner of a possible gas leak at the cranberry storage field. A gas system mechanic (gsm) was dispatch and arrived on-site at 12:23 and identified blowing gas on lateral 60 west. The leak location was approximately 1750 feet north of well 367. Lateral 60 west is a 6 inch pipeline (approximately 11/2 miles long) located in consumers energy's cranberry storage field, marion, michigan (missaukee county) the gsm implemented the standard precautionary lock out tag out process, isolating and shutting down lateral 60 west and barricaded the location until further investigation could be performed. The pipeline was shut down at approximately 12:31. On tueday, november 3, 2015 a 4 foot section of pipeline was cut out and a oval hole approximately .25 x .50 was discovered. The leak was visually examined and preliminary analysis identified corrosion as a possible leak source. The gas loss calculation was determined based on the following information: lateral 60 west was placed back into service on october 7, 2015. The leak was identified and the pipeline was isolated and shut down on october 24, 2015 approximately 36 minutes following notification. A visual inspection was performed by operations personnel when the pipeline was placed back into service, however no additional inspections/patrols were conducted. Because no additional leak inspection was performed during this period, consumers energy opted to calculate the hours from the date the line was placed back in service on october 7th until the leak was discovered and the lateral shut-down resulting in a gas loss of approximately 37mmcf. The gas loss calculation based on notification and isolation and shut down would have resulted in a gas loss calculation of less than 1mmcf. The damaged section of the pipeline was transported to the consumers energy trail street laboratory for further examination. Laboratory analysis confirmed the leak was a result of a localized corrosion pit on the pipe id. The mic testing performed on sludge extracted from the pipeline indicates microbiological influence corrosion (mic) may have caused or contributed to the failure. Lateral 60 west remains shut-in and scheduled for replacement both lateral 60 east and west will be eliminated and replaced with one lateral in summer 2016.
Detailed record list
Report Received Date
2015-11-24 00:00:00
Iyear
2015
Report Number
20150140
Supplemental Number
17172
Report Type
Supplemental Final
Operator Id
2748
Name
Consumers Energy Co
Operator Street Address
One Energy Plaza
Operator City Name
Jackson
Operator State Abbreviation
MI
Operator Postal Code
49201
Local Datetime
2015-10-24 11:55:00
Location Latitude
44.161972
Location Longitude
-85.006155
Nrc Rpt Num
1133332
Nrc Rpt Datetime
2015-11-13 10:29:00
Commodity Released Type
Natural Gas
Unintentional Release
37025
Intentional Release
91.5
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2015-10-24 12:31:00
Still Shutdown Ind
Yes
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2015-10-24 11:55:00
On Site Datetime
2015-10-24 12:23:00
On Off Shore
Onshore
Onshore State Abbreviation
Mi
Onshore Postal Code
49665
Onshore City Name
Marion
Onshore County Name
Missaukee
Designated Location
Survey Station No.
Designated Name
Station 60 W
Pipe Fac Name
Cranberry Lake Storage Field
Segment Name
Lateral 60 West
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
36
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Belowground Storage, Including Associated Equipment And Piping
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
6
Pipe Wall Thickness
0.188
Pipe Smys
35000
Pipe Specification
Api5l
Pipe Seam Type
Longitudinal Erw - Unknown Frequency
Pipe Manufacturer
Youngtown Sheet & Tube
Pipe Coating Type
Other
Pipe Coating Details
Black Wrap With Light Brown Outer Layer, No Abestos Fibers
Installation Year
1957
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Oval Hole Appr .25 X .50
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
117
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
277728
Est Cost Intentional Release
682
Est Cost Prop Damage
10921
Est Cost Emergency
494
Est Cost Other
3127
Est Cost Other Details
Lab Analysis
Prpty
292952
Accident Psig
709
Mop Psig
800
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
No
Accident Identifier
Notification From Public
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 facility was not monitored by a controller at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Localized Pitting
Int Microbiological Ind
Yes
Int Metallurgical Basis Ind
Yes
Int Other Basis Ind
Yes
Int Corrosion Basis Details
Mic Testing
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
Yes
Corrosion Lining
No
Cleaning Dewatering
No
Corrosion Coupons
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Axial Recent Year
2005
Other Tool
Micro Vertiline Tool
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
1999
Hydrtst Most Rcnt Pressure
1241
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
C******* K***
Preparer Title
Senior Engineering Technical Analyst Ii
Preparer Email
C************@c********.com
Preparer Telephone
734-513-6256
Authorizer Name
A***** L* W***
Authorizer Title
Gas Regulatory Services Lead
Authorizer Telephone
517-545-8746
Authorizer Email
A**********@c********
Narrative
At approximately 11:55 on saturday, october 24, 2015 consumers energy gas control was notified by a landowner of a possible gas leak at the cranberry storage field. A gas system mechanic (gsm) was dispatch and arrived on-site at 12:23 and identified blowing gas on lateral 60 west. The leak location was approximately 1750 feet north of well 367. Lateral 60 west is a 6 inch pipeline (approximately 11/2 miles long) located in consumers energy's cranberry storage field, marion, michigan (missaukee county) the gsm implemented the standard precautionary lock out tag out process, isolating and shutting down lateral 60 west and barricaded the location until further investigation could be performed. The pipeline was shut down at approximately 12:31. On tueday, november 3, 2015 a 4 foot section of pipeline was cut out and a oval hole approximately .25 x .50 was discovered. The leak was visually examined and preliminary analysis identified corrosion as a possible leak source. The gas loss calculation was determined based on the following information: lateral 60 west was placed back into service on october 7, 2015. The leak was identified and the pipeline was isolated and shut down on october 24, 2015 approximately 36 minutes following notification. A visual inspection was performed by operations personnel when the pipeline was placed back into service, however no additional inspections/patrols were conducted. Because no additional leak inspection was performed during this period, consumers energy opted to calculate the hours from the date the line was placed back in service on october 7th until the leak was discovered and the lateral shut-down resulting in a gas loss of approximately 37mmcf. The gas loss calculation based on notification and isolation and shut down would have resulted in a gas loss calculation of less than 1mmcf. The damaged section of the pipeline was transported to the consumers energy trail street laboratory for further examination. Laboratory analysis confirmed the leak was a result of a localized corrosion pit on the pipe id. The mic testing performed on sludge extracted from the pipeline indicates microbiological influence corrosion (mic) may have caused or contributed to the failure. Lateral 60 west remains shut-in and scheduled for replacement both lateral 60 east and west will be eliminated and replaced with one lateral in summer 2016.
| Report Received Date | 2015-11-24 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150140 |
| Supplemental Number | 17172 |
| Report Type | Supplemental Final |
| Operator Id | 2748 PHMSA Enforcement |
| Name | Consumers Energy Co |
| Operator Street Address | One Energy Plaza |
| Operator City Name | Jackson |
| Operator State Abbreviation | MI |
| Operator Postal Code | 49201 |
| Local Datetime | 2015-10-24 11:55:00 |
| Location Latitude | 44.161972 Google Maps OpenStreetMap |
| Location Longitude | -85.006155 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1133332 NRC Report How to search |
| Nrc Rpt Datetime | 2015-11-13 10:29:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 37025 |
| Intentional Release | 91.5 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2015-10-24 12:31:00 |
| Still Shutdown Ind | Yes |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2015-10-24 11:55:00 |
| On Site Datetime | 2015-10-24 12:23:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Mi |
| Onshore Postal Code | 49665 |
| Onshore City Name | Marion |
| Onshore County Name | Missaukee |
| Designated Location | Survey Station No. |
| Designated Name | Station 60 W |
| Pipe Fac Name | Cranberry Lake Storage Field |
| Segment Name | Lateral 60 West |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 36 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Belowground Storage, Including Associated Equipment And Piping |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 6 |
| Pipe Wall Thickness | 0.188 |
| Pipe Smys | 35000 |
| Pipe Specification | Api5l |
| Pipe Seam Type | Longitudinal Erw - Unknown Frequency |
| Pipe Manufacturer | Youngtown Sheet & Tube |
| Pipe Coating Type | Other |
| Pipe Coating Details | Black Wrap With Light Brown Outer Layer, No Abestos Fibers |
| Installation Year | 1957 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Oval Hole Appr .25 X .50 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 117 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 277728 |
| Est Cost Intentional Release | 682 |
| Est Cost Prop Damage | 10921 |
| Est Cost Emergency | 494 |
| Est Cost Other | 3127 |
| Est Cost Other Details | Lab Analysis |
| Prpty | 292952 |
| Accident Psig | 709 |
| Mop Psig | 800 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Public |
| 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 facility was not monitored by a controller at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Localized Pitting |
| Int Microbiological Ind | Yes |
| Int Metallurgical Basis Ind | Yes |
| Int Other Basis Ind | Yes |
| Int Corrosion Basis Details | Mic Testing |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | No |
| Cleaning Dewatering | No |
| Corrosion Coupons | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Axial Recent Year | 2005 |
| Other Tool | Micro Vertiline Tool |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 1999 |
| Hydrtst Most Rcnt Pressure | 1241 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | C******* K*** |
| Preparer Title | Senior Engineering Technical Analyst Ii |
| Preparer Email | C************@c********.com |
| Preparer Telephone | 734-513-6256 |
| Authorizer Name | A***** L* W*** |
| Authorizer Title | Gas Regulatory Services Lead |
| Authorizer Telephone | 517-545-8746 |
| Authorizer Email | A**********@c******** |
| Narrative | At approximately 11:55 on saturday, october 24, 2015 consumers energy gas control was notified by a landowner of a possible gas leak at the cranberry storage field. A gas system mechanic (gsm) was dispatch and arrived on-site at 12:23 and identified blowing gas on lateral 60 west. The leak location was approximately 1750 feet north of well 367. Lateral 60 west is a 6 inch pipeline (approximately 11/2 miles long) located in consumers energy's cranberry storage field, marion, michigan (missaukee county) the gsm implemented the standard precautionary lock out tag out process, isolating and shutting down lateral 60 west and barricaded the location until further investigation could be performed. The pipeline was shut down at approximately 12:31. On tueday, november 3, 2015 a 4 foot section of pipeline was cut out and a oval hole approximately .25 x .50 was discovered. The leak was visually examined and preliminary analysis identified corrosion as a possible leak source. The gas loss calculation was determined based on the following information: lateral 60 west was placed back into service on october 7, 2015. The leak was identified and the pipeline was isolated and shut down on october 24, 2015 approximately 36 minutes following notification. A visual inspection was performed by operations personnel when the pipeline was placed back into service, however no additional inspections/patrols were conducted. Because no additional leak inspection was performed during this period, consumers energy opted to calculate the hours from the date the line was placed back in service on october 7th until the leak was discovered and the lateral shut-down resulting in a gas loss of approximately 37mmcf. The gas loss calculation based on notification and isolation and shut down would have resulted in a gas loss calculation of less than 1mmcf. The damaged section of the pipeline was transported to the consumers energy trail street laboratory for further examination. Laboratory analysis confirmed the leak was a result of a localized corrosion pit on the pipe id. The mic testing performed on sludge extracted from the pipeline indicates microbiological influence corrosion (mic) may have caused or contributed to the failure. Lateral 60 west remains shut-in and scheduled for replacement both lateral 60 east and west will be eliminated and replaced with one lateral in summer 2016. |
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