Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2012-04-25 — NE
Operator
Northern Natural Gas Co
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
2 injuries
Property damage (nominal)
$218,190
Incident datetime
2012-04-25 13:58
Report number
Location
NE
Narrative
On april 25, 2012, northern natural gas' 24-inch-diameter south sioux city-to-paulina m560c mainline (c-line) was damaged during the installation of farm drainage tile in a field in plymouth county near hinton, iowa. The tiling work was being performed by derocher construction headquartered in le mars, iowa, on behalf of randy riediger of hinton, iowa, the farm tenant. The damaged c-line ruptured and the escaping gas ignited. Two tiling workers were treated for injuries at a sioux city hospital but their injuries are not believed to be life threatening. No one call request was placed for the tiling operation. Repairs to the c-line and inspection of the nearby 16-inch-diameter south sioux city-to-paulina b-line were completed april 27, 2012. No customers lost service due to the line hit or the subsequent investigation and repairs. Facility planning estimates the total gas lost as a result of this incident to be 57.576 mmcf. The iowa attorney general office contacted northern natural gas immediately following the incident and has opened an investigation into the one call violation. Supplemental/final report for report no. 20120049-15515 dated 05/14/2012. Updated information in part a, section 11, part d, section 7 with estimated final total cost. Approximately 102 feet of new 24-inch-diameter tested pipe was replaced. The legal department of northern natural gas company is following up with seeking reimbursement for cost incurred from the incident. Supplemental/final update to report # 20120049-15648 - in section c, item 6 where a mechanical punture was indicated, although there extensive damage to the pipe, the size of the punture is estimated as 10 inches axial by a circumferential size of 18-inches. Supplemental/final: report # 20120049, dated 5/14/2012 - updated part d item 7a, part g3 item 10 to trencher and item 16. The two tiling workers injuries: one incurred 1st degree burns on his back and the other incurred 1st and 2nd degree burns on his back.
Detailed record list
Report Received Date
2012-05-14 00:00:00
Iyear
2012
Report Number
20120049
Supplemental Number
16732
Report Type
Supplemental Final
Operator Id
13750
Name
Northern Natural Gas Co
Operator Street Address
1111 South 103rd Street
Operator City Name
Omaha
Operator State Abbreviation
NE
Operator Postal Code
68124
Local Datetime
2012-04-25 13:45:00
Location Latitude
42.59731
Location Longitude
-96.12534
Nrc Rpt Num
1009666
Nrc Rpt Datetime
2012-04-25 15:37:00
Commodity Released Type
Natural Gas
Unintentional Release
46285
Intentional Release
12460
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
Yes
Num Emp Injuries
0
Num Contr Injuries
0
Num Er Injuries
0
Num Worker Injuries
2
Num Gp Injuries
0
Injure
2
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2012-04-25 15:02:00
Restart Datetime
2012-04-27 19:27:00
Ignite Ind
Yes
Explode Ind
Yes
Num Pub Evacuated
0
Incident Identified Datetime
2012-04-25 13:58:00
On Site Datetime
2012-04-25 14:10:00
On Off Shore
Onshore
Onshore State Abbreviation
Ia
Onshore Postal Code
51024-8541
Onshore City Name
Hinton
Onshore County Name
Plymouth
Designated Location
Milepost
Designated Name
20.29
Pipe Fac Name
Iam60802-M560c South Sioux City To Paullina C-Line
Segment Name
M560c
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
54
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
24
Pipe Wall Thickness
0.281
Pipe Smys
52000
Pipe Specification
5lx
Pipe Seam Type
Flash Welded
Pipe Manufacturer
A.o.smith
Pipe Coating Type
Coal Tar
Installation Year
1957
Manufactured Year
1957
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
10
Puncture Circum
18
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
468
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
43000
Est Cost Unintentional Release
100486
Est Cost Intentional Release
27051
Est Cost Prop Damage
218190
Est Cost Emergency
83546
Est Cost Other
0
Prpty
472273
Accident Psig
763
Mop Psig
800
Mop Cfr Section
192.619(C)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
40128
Internal Inspection Ind
No
Unsuitable Mainline Ind
Yes
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
Missing 3-Mile Segment
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
Yes
Accident Identifier
Air Patrol
Operator Type
Contractor Working For The Operator
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Excavation Damage
Cause Details
Excavation Damage By Third Party
Ex Party Type
Excavation Damage By Third Party
Prior Notification Ind
No
Notify Cga Dirt
No
Private Row Ind
Yes
Private Subtype
Private Landowner
Excavator Type
Contractor
Excavator Equipment
Trencher
Work Performed
Drainage
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
Unknown/other
Service Interruption
No
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
B**** W***
Preparer Title
Sr Pipeline Safety Specialist
Preparer Email
B*********@n****.com
Preparer Telephone
402-398-7396
Authorizer Name
T***** C******
Authorizer Title
Sr. Director Pipeline Safety And Risk
Authorizer Telephone
402-398-7715
Authorizer Email
T*************@n****.com
Narrative
On april 25, 2012, northern natural gas' 24-inch-diameter south sioux city-to-paulina m560c mainline (c-line) was damaged during the installation of farm drainage tile in a field in plymouth county near hinton, iowa. The tiling work was being performed by derocher construction headquartered in le mars, iowa, on behalf of randy riediger of hinton, iowa, the farm tenant. The damaged c-line ruptured and the escaping gas ignited. Two tiling workers were treated for injuries at a sioux city hospital but their injuries are not believed to be life threatening. No one call request was placed for the tiling operation. Repairs to the c-line and inspection of the nearby 16-inch-diameter south sioux city-to-paulina b-line were completed april 27, 2012. No customers lost service due to the line hit or the subsequent investigation and repairs. Facility planning estimates the total gas lost as a result of this incident to be 57.576 mmcf. The iowa attorney general office contacted northern natural gas immediately following the incident and has opened an investigation into the one call violation. Supplemental/final report for report no. 20120049-15515 dated 05/14/2012. Updated information in part a, section 11, part d, section 7 with estimated final total cost. Approximately 102 feet of new 24-inch-diameter tested pipe was replaced. The legal department of northern natural gas company is following up with seeking reimbursement for cost incurred from the incident. Supplemental/final update to report # 20120049-15648 - in section c, item 6 where a mechanical punture was indicated, although there extensive damage to the pipe, the size of the punture is estimated as 10 inches axial by a circumferential size of 18-inches. Supplemental/final: report # 20120049, dated 5/14/2012 - updated part d item 7a, part g3 item 10 to trencher and item 16. The two tiling workers injuries: one incurred 1st degree burns on his back and the other incurred 1st and 2nd degree burns on his back.
| Report Received Date | 2012-05-14 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120049 |
| Supplemental Number | 16732 |
| Report Type | Supplemental Final |
| Operator Id | 13750 PHMSA Enforcement |
| Name | Northern Natural Gas Co |
| Operator Street Address | 1111 South 103rd Street |
| Operator City Name | Omaha |
| Operator State Abbreviation | NE |
| Operator Postal Code | 68124 |
| Local Datetime | 2012-04-25 13:45:00 |
| Location Latitude | 42.59731 Google Maps OpenStreetMap |
| Location Longitude | -96.12534 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1009666 NRC Report How to search |
| Nrc Rpt Datetime | 2012-04-25 15:37:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 46285 |
| Intentional Release | 12460 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | Yes |
| Num Emp Injuries | 0 |
| Num Contr Injuries | 0 |
| Num Er Injuries | 0 |
| Num Worker Injuries | 2 |
| Num Gp Injuries | 0 |
| Injure | 2 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2012-04-25 15:02:00 |
| Restart Datetime | 2012-04-27 19:27:00 |
| Ignite Ind | Yes |
| Explode Ind | Yes |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2012-04-25 13:58:00 |
| On Site Datetime | 2012-04-25 14:10:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ia |
| Onshore Postal Code | 51024-8541 |
| Onshore City Name | Hinton |
| Onshore County Name | Plymouth |
| Designated Location | Milepost |
| Designated Name | 20.29 |
| Pipe Fac Name | Iam60802-M560c South Sioux City To Paullina C-Line |
| Segment Name | M560c |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 54 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 24 |
| Pipe Wall Thickness | 0.281 |
| Pipe Smys | 52000 |
| Pipe Specification | 5lx |
| Pipe Seam Type | Flash Welded |
| Pipe Manufacturer | A.o.smith |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1957 |
| Manufactured Year | 1957 |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Puncture Axial | 10 |
| Puncture Circum | 18 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 468 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 43000 |
| Est Cost Unintentional Release | 100486 |
| Est Cost Intentional Release | 27051 |
| Est Cost Prop Damage | 218190 |
| Est Cost Emergency | 83546 |
| Est Cost Other | 0 |
| Prpty | 472273 |
| Accident Psig | 763 |
| Mop Psig | 800 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 40128 |
| Internal Inspection Ind | No |
| Unsuitable Mainline Ind | Yes |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | Missing 3-Mile Segment |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | Yes |
| Accident Identifier | Air Patrol |
| Operator Type | Contractor Working For The Operator |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Excavation Damage |
| Cause Details | Excavation Damage By Third Party |
| Ex Party Type | Excavation Damage By Third Party |
| Prior Notification Ind | No |
| Notify Cga Dirt | No |
| Private Row Ind | Yes |
| Private Subtype | Private Landowner |
| Excavator Type | Contractor |
| Excavator Equipment | Trencher |
| Work Performed | Drainage |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | Unknown/other |
| Service Interruption | No |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | B**** W*** |
| Preparer Title | Sr Pipeline Safety Specialist |
| Preparer Email | B*********@n****.com |
| Preparer Telephone | 402-398-7396 |
| Authorizer Name | T***** C****** |
| Authorizer Title | Sr. Director Pipeline Safety And Risk |
| Authorizer Telephone | 402-398-7715 |
| Authorizer Email | T*************@n****.com |
| Narrative | On april 25, 2012, northern natural gas' 24-inch-diameter south sioux city-to-paulina m560c mainline (c-line) was damaged during the installation of farm drainage tile in a field in plymouth county near hinton, iowa. The tiling work was being performed by derocher construction headquartered in le mars, iowa, on behalf of randy riediger of hinton, iowa, the farm tenant. The damaged c-line ruptured and the escaping gas ignited. Two tiling workers were treated for injuries at a sioux city hospital but their injuries are not believed to be life threatening. No one call request was placed for the tiling operation. Repairs to the c-line and inspection of the nearby 16-inch-diameter south sioux city-to-paulina b-line were completed april 27, 2012. No customers lost service due to the line hit or the subsequent investigation and repairs. Facility planning estimates the total gas lost as a result of this incident to be 57.576 mmcf. The iowa attorney general office contacted northern natural gas immediately following the incident and has opened an investigation into the one call violation. Supplemental/final report for report no. 20120049-15515 dated 05/14/2012. Updated information in part a, section 11, part d, section 7 with estimated final total cost. Approximately 102 feet of new 24-inch-diameter tested pipe was replaced. The legal department of northern natural gas company is following up with seeking reimbursement for cost incurred from the incident. Supplemental/final update to report # 20120049-15648 - in section c, item 6 where a mechanical punture was indicated, although there extensive damage to the pipe, the size of the punture is estimated as 10 inches axial by a circumferential size of 18-inches. Supplemental/final: report # 20120049, dated 5/14/2012 - updated part d item 7a, part g3 item 10 to trencher and item 16. The two tiling workers injuries: one incurred 1st degree burns on his back and the other incurred 1st and 2nd degree burns on his back. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA