Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2025-06-01 — NE
Operator
Northern Natural Gas Co
Cause
Other Incident Cause
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2025-06-01 00:00 UTC
Report number
Location
NE
Narrative
At the tescott compressor station on 5/2/2025 at 23:51 hrs, an 8-inch esd valve opened causing a release of 37.523 mmscf of natural gas. Initial pressure at the time of release was 820 psig going to the e-line. A bird had built a nest in the esd valve control box and perched on the control trip handle, causing it to release. The nearby landowner reported releasing gas to the field team at 00:19 hrs. Members of the field team closed the valve at 02:10 hours and cleared out the bird nest. The valve control box was locked at the time of the incident, and it appears that the bird had entered the box through one of the holes on the back of the box. The box's design has multiple holes on the back and sides. An occ call was initiated at 03:42 hrs when the team determined that it could be a reportable condition which facility planning confirmed. The determination was made at 04:05 hrs and a call was made to the nrc at 04:13 hrs (ticket number 1430071). No injuries, no evacuations, and no property damage. Nearest house was 1.42 miles away.
Detailed record list
Report Received Date
2025-06-01 00:00:00
Iyear
2025
Report Number
20250065
Supplemental Number
40975
Report Type
Original
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
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
39.056278
Location Longitude
-97.857123
Nrc Rpt Num
1430071
Additional Nrc Report Numbers
1430225
Commodity Released Type
Natural Gas
Unintentional Release
37523
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
Another Compressor Was Able To Maintain Service.
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Ks
Onshore Postal Code
67484
Onshore City Name
Tescott
Onshore County Name
Ottawa
Designated Location
Not Applicable
Pipe Fac Name
Tescott Compressor Station
Segment Name
Ks-040
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Inside A Building
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Compressor
Installation Year
2020
Manufactured Year
2019
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Emergency Shutdown
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
167
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
102813
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
500
Est Cost Other
0
Gas Cost In Mcf
2.74
Prpty
103313
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
820
Gas Flow In Pipe In Mcf
0
Mop Psig
1000
Mop Cfr Section
192.619(C)
Maop Established Date
2020-10-30 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized 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 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
Incident was caused by the actuation of the esd valve due to a bird resting on the control trip handle.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Incident Cause
Cause Details
Miscellaneous
Other Type
Miscellaneous
Misc Details
A Bird Had Built A Nest In The Esd Blowdown Valve And Had Rested On The Control Trip Handle Which Triggered It And Caused The Release.
Preparer Name
W**** C*****
Preparer Title
Sr Pipeline Integrity Engineer
Preparer Email
W***********@n****.com
Preparer Telephone
4026764066
Local Contact Name
W**** C*****
Local Contact Email
W***********@n****.com
Local Contact Telephone
4026764066
Authorizer Name
T** C******
Authorizer Title
Vp Pipeline Safety And Risk
Authorizer Telephone
4023987715
Authorizer Email
T*************@n****.com
Narrative
At the tescott compressor station on 5/2/2025 at 23:51 hrs, an 8-inch esd valve opened causing a release of 37.523 mmscf of natural gas. Initial pressure at the time of release was 820 psig going to the e-line. A bird had built a nest in the esd valve control box and perched on the control trip handle, causing it to release. The nearby landowner reported releasing gas to the field team at 00:19 hrs. Members of the field team closed the valve at 02:10 hours and cleared out the bird nest. The valve control box was locked at the time of the incident, and it appears that the bird had entered the box through one of the holes on the back of the box. The box's design has multiple holes on the back and sides. An occ call was initiated at 03:42 hrs when the team determined that it could be a reportable condition which facility planning confirmed. The determination was made at 04:05 hrs and a call was made to the nrc at 04:13 hrs (ticket number 1430071). No injuries, no evacuations, and no property damage. Nearest house was 1.42 miles away.
| Report Received Date | 2025-06-01 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250065 |
| Supplemental Number | 40975 |
| Report Type | Original |
| 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 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 39.056278 Google Maps OpenStreetMap |
| Location Longitude | -97.857123 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1430071 NRC Report How to search |
| Additional Nrc Report Numbers | 1430225 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 37523 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Another Compressor Was Able To Maintain Service. |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ks |
| Onshore Postal Code | 67484 |
| Onshore City Name | Tescott |
| Onshore County Name | Ottawa |
| Designated Location | Not Applicable |
| Pipe Fac Name | Tescott Compressor Station |
| Segment Name | Ks-040 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Inside A Building |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Compressor |
| Installation Year | 2020 |
| Manufactured Year | 2019 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Emergency Shutdown |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 167 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 102813 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 500 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.74 |
| Prpty | 103313 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 820 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 1000 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Maop Established Date | 2020-10-30 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized 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 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 | Incident was caused by the actuation of the esd valve due to a bird resting on the control trip handle. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Incident Cause |
| Cause Details | Miscellaneous |
| Other Type | Miscellaneous |
| Misc Details | A Bird Had Built A Nest In The Esd Blowdown Valve And Had Rested On The Control Trip Handle Which Triggered It And Caused The Release. |
| Preparer Name | W**** C***** |
| Preparer Title | Sr Pipeline Integrity Engineer |
| Preparer Email | W***********@n****.com |
| Preparer Telephone | 4026764066 |
| Local Contact Name | W**** C***** |
| Local Contact Email | W***********@n****.com |
| Local Contact Telephone | 4026764066 |
| Authorizer Name | T** C****** |
| Authorizer Title | Vp Pipeline Safety And Risk |
| Authorizer Telephone | 4023987715 |
| Authorizer Email | T*************@n****.com |
| Narrative | At the tescott compressor station on 5/2/2025 at 23:51 hrs, an 8-inch esd valve opened causing a release of 37.523 mmscf of natural gas. Initial pressure at the time of release was 820 psig going to the e-line. A bird had built a nest in the esd valve control box and perched on the control trip handle, causing it to release. The nearby landowner reported releasing gas to the field team at 00:19 hrs. Members of the field team closed the valve at 02:10 hours and cleared out the bird nest. The valve control box was locked at the time of the incident, and it appears that the bird had entered the box through one of the holes on the back of the box. The box's design has multiple holes on the back and sides. An occ call was initiated at 03:42 hrs when the team determined that it could be a reportable condition which facility planning confirmed. The determination was made at 04:05 hrs and a call was made to the nrc at 04:13 hrs (ticket number 1430071). No injuries, no evacuations, and no property damage. Nearest house was 1.42 miles away. |
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