Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2025-08-01 — CO
Operator
Tallgrass Pony Express Pipeline, Llc
Cause
Other Accident Cause
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2025-08-01 00:00 UTC
Report number
Location
CO
Narrative
On july 2, 2025, tallgrass personnel observed crude oil on the ground during a station walkthrough and a call was made to the tallgrass operations control center (occ) to isolate the facility from the mainline and to initiate the internal emergency response procedures. The source of the release was not observed on any of the aboveground piping. Steps were taken to prevent the migration of crude oil offsite, the osro was contacted, and an emergency one call was placed in preparation for excavation to determine the source of the release. Excavation began after the osro arrived onsite. The source of the release was found to be on the underground 2� drain line on station discharge piping. The affected part was cut out and was sent for analysis. The cutout was replaced before newkirk station was started back up. Tallgrass is currently waiting for results from analysis on the cut-out to determine the apparent cause. The supplemental-final report will have the apparent cause and updated costs.
Detailed record list
Report Received Date
2025-08-01 00:00:00
Iyear
2025
Report Number
20250181
Supplemental Number
41195
Report Type
Original
Operator Id
39043
Name
Tallgrass Pony Express Pipeline, Llc
Operator Street Address
370 Van Gordon St.
Operator City Name
Lakewood
Operator State Abbreviation
CO
Operator Postal Code
80228
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
36.8176
Location Longitude
-97.115716
Commodity Released Type
Crude Oil
Unintentional Release Bbls
457
Recovered Bbls
457
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
No
Nrc Rpt Num
1435820
Additional Nrc Report Numbers
1435953
Ignite Ind
No
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
Yes
Osro Arrived On Site Dt
7/2/2025 13:27
Num Pub Evacuated
0
Pipe Fac Name
Newkirk Pump Station
Segment Name
2" Drain Line
Onshore State Abbreviation
Ok
Onshore Postal Code
74647
Onshore City Name
Not Within A Municipality
Onshore County Name
Kay
Designated Location
Milepost
Designated Name
Facility
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
96
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Puddle Weld Ind
No
Pipe Diameter
2
Pipe Wall Thickness
0.154
Pipe Smys
49500
Pipe Specification
Asme B16.9
Pipe Seam Type
Seamless
Pipe Manufacturer
Tube Forgings Of America
Pipe Coating Type
Fusion Bonded Epoxy(Fbe)
Coating Applied Ind
Yes
Installation Year
2014
Manufactured Year
2014
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
0
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
0
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
500
Mop Psig
1440
Mop Cfr Section
Subpart E Pressure Test �195.406(A)(3)
Maop Established Date
2015-01-30 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
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 leak originated from a small pinhole, resulting in a release not detectable by the controller
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Accident Cause
Cause Details
Unknown
Other Type
Unknown
Unknown Subtype
Still Under Investigation, Cause Of Accident To Be Determined* (*supplemental Report Required)
Preparer Name
K****** M********
Preparer Title
Senior Compliance Coordinator
Preparer Email
K****************@t********.com
Preparer Telephone
303-763-3408
Prepared Date
2025-08-01 00:00:00
Authorizer Name
D******* S*******
Authorizer Telephone
346-388-0550
Authorizer Title
Director Phmsa Compliance
Authorizer Email
D****************@t********.com
Narrative
On july 2, 2025, tallgrass personnel observed crude oil on the ground during a station walkthrough and a call was made to the tallgrass operations control center (occ) to isolate the facility from the mainline and to initiate the internal emergency response procedures. The source of the release was not observed on any of the aboveground piping. Steps were taken to prevent the migration of crude oil offsite, the osro was contacted, and an emergency one call was placed in preparation for excavation to determine the source of the release. Excavation began after the osro arrived onsite. The source of the release was found to be on the underground 2� drain line on station discharge piping. The affected part was cut out and was sent for analysis. The cutout was replaced before newkirk station was started back up. Tallgrass is currently waiting for results from analysis on the cut-out to determine the apparent cause. The supplemental-final report will have the apparent cause and updated costs.
| Report Received Date | 2025-08-01 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250181 |
| Supplemental Number | 41195 |
| Report Type | Original |
| Operator Id | 39043 PHMSA Enforcement |
| Name | Tallgrass Pony Express Pipeline, Llc |
| Operator Street Address | 370 Van Gordon St. |
| Operator City Name | Lakewood |
| Operator State Abbreviation | CO |
| Operator Postal Code | 80228 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 36.8176 Google Maps OpenStreetMap |
| Location Longitude | -97.115716 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 457 |
| Recovered Bbls | 457 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | No |
| Nrc Rpt Num | 1435820 NRC Report How to search |
| Additional Nrc Report Numbers | 1435953 |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | Yes |
| Osro Arrived On Site Dt | 7/2/2025 13:27 |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Newkirk Pump Station |
| Segment Name | 2" Drain Line |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 74647 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Kay |
| Designated Location | Milepost |
| Designated Name | Facility |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 96 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Puddle Weld Ind | No |
| Pipe Diameter | 2 |
| Pipe Wall Thickness | 0.154 |
| Pipe Smys | 49500 |
| Pipe Specification | Asme B16.9 |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Tube Forgings Of America |
| Pipe Coating Type | Fusion Bonded Epoxy(Fbe) |
| Coating Applied Ind | Yes |
| Installation Year | 2014 |
| Manufactured Year | 2014 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 0 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 500 |
| Mop Psig | 1440 |
| Mop Cfr Section | Subpart E Pressure Test �195.406(A)(3) View CFR 49 §192 |
| Maop Established Date | 2015-01-30 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| 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 leak originated from a small pinhole, resulting in a release not detectable by the controller |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Accident Cause |
| Cause Details | Unknown |
| Other Type | Unknown |
| Unknown Subtype | Still Under Investigation, Cause Of Accident To Be Determined* (*supplemental Report Required) |
| Preparer Name | K****** M******** |
| Preparer Title | Senior Compliance Coordinator |
| Preparer Email | K****************@t********.com |
| Preparer Telephone | 303-763-3408 |
| Prepared Date | 2025-08-01 00:00:00 |
| Authorizer Name | D******* S******* |
| Authorizer Telephone | 346-388-0550 |
| Authorizer Title | Director Phmsa Compliance |
| Authorizer Email | D****************@t********.com |
| Narrative | On july 2, 2025, tallgrass personnel observed crude oil on the ground during a station walkthrough and a call was made to the tallgrass operations control center (occ) to isolate the facility from the mainline and to initiate the internal emergency response procedures. The source of the release was not observed on any of the aboveground piping. Steps were taken to prevent the migration of crude oil offsite, the osro was contacted, and an emergency one call was placed in preparation for excavation to determine the source of the release. Excavation began after the osro arrived onsite. The source of the release was found to be on the underground 2� drain line on station discharge piping. The affected part was cut out and was sent for analysis. The cutout was replaced before newkirk station was started back up. Tallgrass is currently waiting for results from analysis on the cut-out to determine the apparent cause. The supplemental-final report will have the apparent cause and updated costs. |
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