Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-09-14 — CO
Operator
Tallgrass Interstate Gas Transmission, Llc
Cause
Notification Issue
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$27,740
Incident datetime
2023-09-14 00:00 UTC
Report number
Location
CO
Narrative
On august 16, 2023, at 8:07 mt, tallgrass occ received a call from keith county 911 indicating a release of gas on a pipeline located near a mile marker on highway 30. Tallgrass occ personnel located the general area of the release and notified tallgrass field operations personnel of the release who mobilized to the site. Tallgrass occ initiated emergency response procedures and began shut down of compressor stations to limit the release of natural gas. Tallgrass field operations arrived onsite and confirmed location of release and the local fire department had already blocked and isolated highway 30. Tallgrass field operations personnel then closed valves to further isolate the release. Once the release was stopped, highway 30 was reopened. The impacted pipeline was exposed for evaluation and repair. Pipe on either side of release location along with pieces of the pipe in the excavation were collected and have been sent for metallurgical evaluation. Replacement pipe, that was already pressure tested, was welded into place and underwent a ut survey, blast and recoat, and coating inspection with no holidays found. The pipeline was placed back into service on august 17, 2023 at 19:25 mt. 04/17/2024 update updated e.11 with results from control room investigation updated equipment in g3.5 updated work performed in g3.6 investigation results concluded that the third-party excavator failed to use one call system prior to excavation and struck the pipeline, resulting in a pipeline rupture. Third party metallurgical report confirmed the pipeline failed due to mechanical damage and did not have preexisting defects and did not fail due to overpressure.
Detailed record list
Report Received Date
2023-09-14 00:00:00
Iyear
2023
Report Number
20230088
Supplemental Number
39451
Report Type
Supplemental Final
Operator Id
1007
Name
Tallgrass Interstate Gas Transmission, Llc
Operator Street Address
370 Van Gordon St
Operator City Name
Lakewood
Operator State Abbreviation
CO
Operator Postal Code
80228
Time Zone
Mountain
Daylight Savings Ind
Yes
Location Latitude
41.1275062
Location Longitude
-101.4596987
Nrc Rpt Num
1376349
Additional Nrc Report Numbers
1376353, 1376557
Commodity Released Type
Natural Gas
Unintentional Release
13020
Intentional Release
580
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
Yes
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Big Springs Compressor Station Issued Stop Command
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Lexington Compressor Station Issued Stop Command
Num Pub Evacuated
2
On Off Shore
Onshore
Onshore State Abbreviation
Ne
Onshore Postal Code
69155
Onshore City Name
Not Within A Municipality
Onshore County Name
Keith
Designated Location
Survey Station No.
Designated Name
1875+14
Pipe Fac Name
Ogallala - North Platte
Segment Name
700-008-00-00
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
24
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
10
Puddle Weld Ind
No
Pipe Wall Thickness
0.219
Pipe Smys
42000
Pipe Specification
X42
Pipe Seam Type
Longitudinal Erw - Low Frequency
Pipe Manufacturer
Youngstown
Pipe Coating Type
Coal Tar
Coating Applied Ind
Yes
Installation Year
1952
Manufactured Year
1952
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Circumferential
Rupture Length
42
Rupture Width
10
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
250
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
26717
Est Cost Intentional Release
1190
Est Cost Prop Damage
27740
Est Cost Emergency
4044
Est Cost Other
0
Gas Cost In Mcf
2.052
Prpty
59691
Num Persons Hosp Not Ovnght
1
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
1
Wildlife Impact Ind
No
Accident Psig
843
Gas Flow In Pipe In Mcf
50944
Mop Psig
930
Mop Cfr Section
192.619(C)
Maop Established Date
1970-07-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
Yes
Gas Odorized Ind
Yes
Length Segment Isolated
46662
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
No
Accident Identifier
Notification From Emergency Responder
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest Schedule Ind
Yes
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
State Law Exempt Ind
No
Notify Cga Dirt
No
Private Row Ind
Yes
Private Subtype
Private Landowner
Pipeline Easement Row Ind
Yes
Joint Trench Ind
No
Cross Bore Ind
No
Depth Of Grade
Measured Depth From Grade
Depth Of Grade Detail
24
Excavator Type
Farmer
Excavator Equipment
Backhoe/trackhoe
Work Performed
Grading
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
No
Service Interruption
Yes
Service Interruption Hours
35
Root Cause Category
Notification Issue
Root Cause Type
No Notification Made To The One-Call Center/811
Preparer Name
K****** M********
Preparer Title
Sr. Compliance Coordinator
Preparer Email
K****************@t********.com
Preparer Telephone
303-763-3408
Authorizer Name
D******* S*******
Authorizer Title
Director Phmsa Compliance
Authorizer Telephone
346-388-0550
Authorizer Email
D****************@t********.com
Narrative
On august 16, 2023, at 8:07 mt, tallgrass occ received a call from keith county 911 indicating a release of gas on a pipeline located near a mile marker on highway 30. Tallgrass occ personnel located the general area of the release and notified tallgrass field operations personnel of the release who mobilized to the site. Tallgrass occ initiated emergency response procedures and began shut down of compressor stations to limit the release of natural gas. Tallgrass field operations arrived onsite and confirmed location of release and the local fire department had already blocked and isolated highway 30. Tallgrass field operations personnel then closed valves to further isolate the release. Once the release was stopped, highway 30 was reopened. The impacted pipeline was exposed for evaluation and repair. Pipe on either side of release location along with pieces of the pipe in the excavation were collected and have been sent for metallurgical evaluation. Replacement pipe, that was already pressure tested, was welded into place and underwent a ut survey, blast and recoat, and coating inspection with no holidays found. The pipeline was placed back into service on august 17, 2023 at 19:25 mt. 04/17/2024 update updated e.11 with results from control room investigation updated equipment in g3.5 updated work performed in g3.6 investigation results concluded that the third-party excavator failed to use one call system prior to excavation and struck the pipeline, resulting in a pipeline rupture. Third party metallurgical report confirmed the pipeline failed due to mechanical damage and did not have preexisting defects and did not fail due to overpressure.
| Report Received Date | 2023-09-14 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230088 |
| Supplemental Number | 39451 |
| Report Type | Supplemental Final |
| Operator Id | 1007 PHMSA Enforcement |
| Name | Tallgrass Interstate Gas Transmission, Llc |
| Operator Street Address | 370 Van Gordon St |
| Operator City Name | Lakewood |
| Operator State Abbreviation | CO |
| Operator Postal Code | 80228 |
| Time Zone | Mountain |
| Daylight Savings Ind | Yes |
| Location Latitude | 41.1275062 Google Maps OpenStreetMap |
| Location Longitude | -101.4596987 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1376349 NRC Report How to search |
| Additional Nrc Report Numbers | 1376353, 1376557 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 13020 |
| Intentional Release | 580 |
| 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 | Yes |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Big Springs Compressor Station Issued Stop Command |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Lexington Compressor Station Issued Stop Command |
| Num Pub Evacuated | 2 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ne |
| Onshore Postal Code | 69155 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Keith |
| Designated Location | Survey Station No. |
| Designated Name | 1875+14 |
| Pipe Fac Name | Ogallala - North Platte |
| Segment Name | 700-008-00-00 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 24 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 10 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.219 |
| Pipe Smys | 42000 |
| Pipe Specification | X42 |
| Pipe Seam Type | Longitudinal Erw - Low Frequency |
| Pipe Manufacturer | Youngstown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Yes |
| Installation Year | 1952 |
| Manufactured Year | 1952 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Circumferential |
| Rupture Length | 42 |
| Rupture Width | 10 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 250 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 26717 |
| Est Cost Intentional Release | 1190 |
| Est Cost Prop Damage | 27740 |
| Est Cost Emergency | 4044 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.052 |
| Prpty | 59691 |
| Num Persons Hosp Not Ovnght | 1 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 1 |
| Wildlife Impact Ind | No |
| Accident Psig | 843 |
| Gas Flow In Pipe In Mcf | 50944 |
| Mop Psig | 930 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Maop Established Date | 1970-07-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | Yes |
| Gas Odorized Ind | Yes |
| Length Segment Isolated | 46662 |
| 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 | No |
| Accident Identifier | Notification From Emergency Responder |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest Schedule Ind | Yes |
| 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 |
| State Law Exempt Ind | No |
| Notify Cga Dirt | No |
| Private Row Ind | Yes |
| Private Subtype | Private Landowner |
| Pipeline Easement Row Ind | Yes |
| Joint Trench Ind | No |
| Cross Bore Ind | No |
| Depth Of Grade | Measured Depth From Grade |
| Depth Of Grade Detail | 24 |
| Excavator Type | Farmer |
| Excavator Equipment | Backhoe/trackhoe |
| Work Performed | Grading |
| One Call Notified Ind | No |
| Locator Type | Unknown/other |
| Visible Marks | No |
| Service Interruption | Yes |
| Service Interruption Hours | 35 |
| Root Cause Category | Notification Issue |
| Root Cause Type | No Notification Made To The One-Call Center/811 |
| Preparer Name | K****** M******** |
| Preparer Title | Sr. Compliance Coordinator |
| Preparer Email | K****************@t********.com |
| Preparer Telephone | 303-763-3408 |
| Authorizer Name | D******* S******* |
| Authorizer Title | Director Phmsa Compliance |
| Authorizer Telephone | 346-388-0550 |
| Authorizer Email | D****************@t********.com |
| Narrative | On august 16, 2023, at 8:07 mt, tallgrass occ received a call from keith county 911 indicating a release of gas on a pipeline located near a mile marker on highway 30. Tallgrass occ personnel located the general area of the release and notified tallgrass field operations personnel of the release who mobilized to the site. Tallgrass occ initiated emergency response procedures and began shut down of compressor stations to limit the release of natural gas. Tallgrass field operations arrived onsite and confirmed location of release and the local fire department had already blocked and isolated highway 30. Tallgrass field operations personnel then closed valves to further isolate the release. Once the release was stopped, highway 30 was reopened. The impacted pipeline was exposed for evaluation and repair. Pipe on either side of release location along with pieces of the pipe in the excavation were collected and have been sent for metallurgical evaluation. Replacement pipe, that was already pressure tested, was welded into place and underwent a ut survey, blast and recoat, and coating inspection with no holidays found. The pipeline was placed back into service on august 17, 2023 at 19:25 mt. 04/17/2024 update updated e.11 with results from control room investigation updated equipment in g3.5 updated work performed in g3.6 investigation results concluded that the third-party excavator failed to use one call system prior to excavation and struck the pipeline, resulting in a pipeline rupture. Third party metallurgical report confirmed the pipeline failed due to mechanical damage and did not have preexisting defects and did not fail due to overpressure. |
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