Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2025-09-14 — CO
Operator
Rockies Express Pipeline Llc
Cause
Other Incident Cause
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$1,200
Incident datetime
2025-09-14 10:50
Report number
Location
CO
Narrative
On 9/13/2025 at 10:00pm chandlersville station unit 5100 plc rack power supply failed. On 9/14/2025 at 10:30am a neighbor of the station called a tallgrass technician and reported a loud noise. The technician arrived onsite at 10:50am and closed the suction and discharge valves manually stopping the leak. Incident investigation is ongoing (supplemental will be filed).
Detailed record list
Report Received Date
2025-10-10 00:00:00
Iyear
2025
Report Number
20250114
Supplemental Number
41452
Report Type
Original
Operator Id
32163
Name
Rockies Express Pipeline Llc
Operator Street Address
370 Van Gordon St
Operator City Name
Lakewood
Operator State Abbreviation
CO
Operator Postal Code
80228
Local Datetime
2025-09-13 21:47:00
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
39.84014
Location Longitude
-81.94064
Nrc Rpt Num
1442701
Nrc Rpt Datetime
2025-09-14 12:57:00
Additional Nrc Report Numbers
1442709, 1442871
Commodity Released Type
Natural Gas
Unintentional Release
55000
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
Unit 5100 Was Isolated, But The Station Remained Online.
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2025-09-14 10:50:00
On Site Datetime
2025-09-14 10:50:00
Confirmed Discovery Datetime
2025-09-14 12:30:00
On Off Shore
Onshore
Onshore State Abbreviation
Oh
Onshore Postal Code
43771
Onshore City Name
Philo
Onshore County Name
Muskingum
Designated Location
Not Applicable
Pipe Fac Name
Rockies Express Pipeline
Segment Name
Chandlersville Compressor Station
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Instrumentation
Installation Year
2009
Manufactured Year
2007
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Plc Power Supply Failure Resulted In Unit Isolation Valves And Vents Being Open At The Same Time. Gas Flowed In The Unit Suction Valve, Through Compressor And Out The Vent Valve Through A Blowdown Silencer.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
1171
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
Yes
Mca Buildng Human Occupy Ind
Yes
Est Cost Oper Paid
0
Est Cost Unintentional Release
98450
Est Cost Intentional Release
0
Est Cost Prop Damage
1200
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
1.79
Prpty
99650
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
943
Gas Flow In Pipe In Mcf
310000
Mop Psig
1480
Mop Cfr Section
Other
Mop Cfr Section Details
Special Permit
Maop Established Date
2009-06-22 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
Yes, but the investigation of the control room and/or controller actions has not yet been completed by the operator (supplemental report required)
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Incident Cause
Cause Details
Unknown
Other Type
Unknown
Unknown Subtype
Still Under Investigation, Cause Of Incident To Be Determined* (*supplemental Report Required)
Preparer Name
S****** H*****
Preparer Title
Sr. Compliance Coordinator
Preparer Email
S*************@t********.com
Preparer Telephone
2814354951
Authorizer Name
D******* S*******
Authorizer Title
Director Phmsa Compliance
Authorizer Telephone
713-725-0147
Authorizer Email
D****************@t********.com
Narrative
On 9/13/2025 at 10:00pm chandlersville station unit 5100 plc rack power supply failed. On 9/14/2025 at 10:30am a neighbor of the station called a tallgrass technician and reported a loud noise. The technician arrived onsite at 10:50am and closed the suction and discharge valves manually stopping the leak. Incident investigation is ongoing (supplemental will be filed).
| Report Received Date | 2025-10-10 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250114 |
| Supplemental Number | 41452 |
| Report Type | Original |
| Operator Id | 32163 PHMSA Enforcement |
| Name | Rockies Express Pipeline Llc |
| Operator Street Address | 370 Van Gordon St |
| Operator City Name | Lakewood |
| Operator State Abbreviation | CO |
| Operator Postal Code | 80228 |
| Local Datetime | 2025-09-13 21:47:00 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 39.84014 Google Maps OpenStreetMap |
| Location Longitude | -81.94064 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1442701 NRC Report How to search |
| Nrc Rpt Datetime | 2025-09-14 12:57:00 |
| Additional Nrc Report Numbers | 1442709, 1442871 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 55000 |
| 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 | Unit 5100 Was Isolated, But The Station Remained Online. |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2025-09-14 10:50:00 |
| On Site Datetime | 2025-09-14 10:50:00 |
| Confirmed Discovery Datetime | 2025-09-14 12:30:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Oh |
| Onshore Postal Code | 43771 |
| Onshore City Name | Philo |
| Onshore County Name | Muskingum |
| Designated Location | Not Applicable |
| Pipe Fac Name | Rockies Express Pipeline |
| Segment Name | Chandlersville Compressor Station |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Instrumentation |
| Installation Year | 2009 |
| Manufactured Year | 2007 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Plc Power Supply Failure Resulted In Unit Isolation Valves And Vents Being Open At The Same Time. Gas Flowed In The Unit Suction Valve, Through Compressor And Out The Vent Valve Through A Blowdown Silencer. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 1171 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | Yes |
| Mca Buildng Human Occupy Ind | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 98450 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 1200 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 1.79 |
| Prpty | 99650 |
| 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 | 943 |
| Gas Flow In Pipe In Mcf | 310000 |
| Mop Psig | 1480 |
| Mop Cfr Section | Other View CFR 49 §192 |
| Mop Cfr Section Details | Special Permit |
| Maop Established Date | 2009-06-22 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 | Yes, but the investigation of the control room and/or controller actions has not yet been completed by the operator (supplemental report required) |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Incident Cause |
| Cause Details | Unknown |
| Other Type | Unknown |
| Unknown Subtype | Still Under Investigation, Cause Of Incident To Be Determined* (*supplemental Report Required) |
| Preparer Name | S****** H***** |
| Preparer Title | Sr. Compliance Coordinator |
| Preparer Email | S*************@t********.com |
| Preparer Telephone | 2814354951 |
| Authorizer Name | D******* S******* |
| Authorizer Title | Director Phmsa Compliance |
| Authorizer Telephone | 713-725-0147 |
| Authorizer Email | D****************@t********.com |
| Narrative | On 9/13/2025 at 10:00pm chandlersville station unit 5100 plc rack power supply failed. On 9/14/2025 at 10:30am a neighbor of the station called a tallgrass technician and reported a loud noise. The technician arrived onsite at 10:50am and closed the suction and discharge valves manually stopping the leak. Incident investigation is ongoing (supplemental will be filed). |
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