Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2018-11-27 — NE
Operator
Northern Natural Gas Co
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$90,000
Incident datetime
2018-11-27 09:49
Report number
Location
NE
Narrative
On november 27, 2018, mumm backhoe and excavating, llc, was installing drain tile in farmland located near colo, iowa. Company owner greg mumm ("mumm") and employee tim abel ("abel") were hired by land owner dave egger ("egger") to install drain tile in his farm field due to drainage issues encountered earlier in the year. Abel was operating the tiling machine on the southeast 1/4 section, (s34, t48n, r21w) in story county, iowa, and mumm was routing drain tile with his vehicle and drain tile trailer. At approximately 0945, abel was using the tiling machine to install drain tile in the northwest corner of the property in an easterly direction and made contact with and damaged northern natural gas ("northern") 10-inch-diameter iab66101 branch line causing a rupture and gas leak. Northern isolated and blew down branch line iab66101 and completed repairs to restore service november 29, 2018. The incident resulted in a gas release of approximately 7.0 mcf and an emergency which was reported to the national response center (notification #1231388 and 1231571). The root cause was failure by mumm to make a one call notification prior to performing trenching activities. Had mumm properly submitted a one call, this would have notified northern to perform a line locate, which could have prevented the line strike.
Detailed record list
Report Received Date
2018-12-13 00:00:00
Iyear
2018
Report Number
20180128
Supplemental Number
31323
Report Type
Original 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
2018-11-27 09:45:00
Location Latitude
42.042107
Location Longitude
-93.270962
Nrc Rpt Num
1231388
Nrc Rpt Datetime
2018-11-27 10:43:00
Commodity Released Type
Natural Gas
Unintentional Release
7000
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2018-11-27 13:56:00
Restart Datetime
2018-11-29 10:18:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2018-11-27 09:49:00
On Site Datetime
2018-11-27 11:00:00
On Off Shore
Onshore
Onshore State Abbreviation
Ia
Onshore Postal Code
50056
Onshore City Name
Not Within A Municipality
Onshore County Name
Story
Designated Location
Milepost
Designated Name
20.5
Pipe Fac Name
Marshalltown 10-Inch
Segment Name
Iab66101
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
44
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
10.75
Pipe Wall Thickness
0.219
Pipe Smys
42000
Pipe Specification
5lx
Pipe Seam Type
Longitudinal Erw - Low Frequency
Pipe Manufacturer
Republic
Pipe Coating Type
Cold Applied Tape
Installation Year
1950
Manufactured Year
1950
Material Involved
Carbon Steel
Release Type
Mechanical Puncture
Puncture Axial
3
Puncture Circum
1
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
166
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
32410
Est Cost Intentional Release
0
Est Cost Prop Damage
90000
Est Cost Emergency
10000
Est Cost Other
0
Prpty
132410
Accident Psig
425
Mop Psig
500
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
39000
Internal Inspection Ind
Yes
Operation Complications Ind
No
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
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 third party contacted northern before the controllers could react.
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
Service Interruption
No
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
J*** A G******
Preparer Title
Sr Corrosion Specialist
Preparer Email
J***********@n****.com
Preparer Telephone
4023987494
Authorizer Name
T***** G C******
Authorizer Title
Vp Pipeline Safety And Risk
Authorizer Telephone
4023987715
Authorizer Email
T*************@n****.com
Narrative
On november 27, 2018, mumm backhoe and excavating, llc, was installing drain tile in farmland located near colo, iowa. Company owner greg mumm ("mumm") and employee tim abel ("abel") were hired by land owner dave egger ("egger") to install drain tile in his farm field due to drainage issues encountered earlier in the year. Abel was operating the tiling machine on the southeast 1/4 section, (s34, t48n, r21w) in story county, iowa, and mumm was routing drain tile with his vehicle and drain tile trailer. At approximately 0945, abel was using the tiling machine to install drain tile in the northwest corner of the property in an easterly direction and made contact with and damaged northern natural gas ("northern") 10-inch-diameter iab66101 branch line causing a rupture and gas leak. Northern isolated and blew down branch line iab66101 and completed repairs to restore service november 29, 2018. The incident resulted in a gas release of approximately 7.0 mcf and an emergency which was reported to the national response center (notification #1231388 and 1231571). The root cause was failure by mumm to make a one call notification prior to performing trenching activities. Had mumm properly submitted a one call, this would have notified northern to perform a line locate, which could have prevented the line strike.
| Report Received Date | 2018-12-13 00:00:00 |
|---|---|
| Iyear | 2018 |
| Report Number | 20180128 |
| Supplemental Number | 31323 |
| Report Type | Original 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 | 2018-11-27 09:45:00 |
| Location Latitude | 42.042107 Google Maps OpenStreetMap |
| Location Longitude | -93.270962 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1231388 NRC Report How to search |
| Nrc Rpt Datetime | 2018-11-27 10:43:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 7000 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2018-11-27 13:56:00 |
| Restart Datetime | 2018-11-29 10:18:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2018-11-27 09:49:00 |
| On Site Datetime | 2018-11-27 11:00:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ia |
| Onshore Postal Code | 50056 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Story |
| Designated Location | Milepost |
| Designated Name | 20.5 |
| Pipe Fac Name | Marshalltown 10-Inch |
| Segment Name | Iab66101 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 44 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 10.75 |
| Pipe Wall Thickness | 0.219 |
| Pipe Smys | 42000 |
| Pipe Specification | 5lx |
| Pipe Seam Type | Longitudinal Erw - Low Frequency |
| Pipe Manufacturer | Republic |
| Pipe Coating Type | Cold Applied Tape |
| Installation Year | 1950 |
| Manufactured Year | 1950 |
| Material Involved | Carbon Steel |
| Release Type | Mechanical Puncture |
| Puncture Axial | 3 |
| Puncture Circum | 1 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 166 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 32410 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 90000 |
| Est Cost Emergency | 10000 |
| Est Cost Other | 0 |
| Prpty | 132410 |
| Accident Psig | 425 |
| Mop Psig | 500 |
| 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 | 39000 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| 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 | 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 third party contacted northern before the controllers could react. |
| 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 |
| Service Interruption | No |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | J*** A G****** |
| Preparer Title | Sr Corrosion Specialist |
| Preparer Email | J***********@n****.com |
| Preparer Telephone | 4023987494 |
| Authorizer Name | T***** G C****** |
| Authorizer Title | Vp Pipeline Safety And Risk |
| Authorizer Telephone | 4023987715 |
| Authorizer Email | T*************@n****.com |
| Narrative | On november 27, 2018, mumm backhoe and excavating, llc, was installing drain tile in farmland located near colo, iowa. Company owner greg mumm ("mumm") and employee tim abel ("abel") were hired by land owner dave egger ("egger") to install drain tile in his farm field due to drainage issues encountered earlier in the year. Abel was operating the tiling machine on the southeast 1/4 section, (s34, t48n, r21w) in story county, iowa, and mumm was routing drain tile with his vehicle and drain tile trailer. At approximately 0945, abel was using the tiling machine to install drain tile in the northwest corner of the property in an easterly direction and made contact with and damaged northern natural gas ("northern") 10-inch-diameter iab66101 branch line causing a rupture and gas leak. Northern isolated and blew down branch line iab66101 and completed repairs to restore service november 29, 2018. The incident resulted in a gas release of approximately 7.0 mcf and an emergency which was reported to the national response center (notification #1231388 and 1231571). The root cause was failure by mumm to make a one call notification prior to performing trenching activities. Had mumm properly submitted a one call, this would have notified northern to perform a line locate, which could have prevented the line strike. |
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